JP2010205989A - Solar cell, and concentrating solar power generation module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar cell that prevents mixture of foreign matters, such as rainwater and dust, from the outside and has high heat resistance, reliability, and weatherability, to provide a concentrating solar power generation module, and to provide a method of manufacturing the solar cells. <P>SOLUTION: The solar cell 21 includes: an optical member 40 for transmitting condensed solar light Ls; a solar cell element 23 for photoelectrically converting the solar light Ls transmitted through the optical member 40; and a receiver substrate 22 on which the solar cell element 23 is placed. The solar cell 21 includes: a first bonding section 31 bonded to the receiver substrate 22 and formed in a frame shape for surrounding the solar cell element 23; and a pedestal section 45 that abuts on the receiver substrate 22 and is bonded to the first bonding section 31 while surrounding the solar cell element 23. The optical member 40 (first flat optical member 40f) is disposed in an internal region of a peripheral frame 45f of the pedestal 45. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solar cell that includes an optical member that irradiates a solar cell element with concentrated sunlight and a receiver substrate on which the solar cell element is mounted, and concentrating sunlight that includes such a solar cell. The present invention relates to a power generation module and a solar cell manufacturing method for manufacturing such a solar cell.

  Solar power generation devices that convert solar energy into electric power have been put into practical use, but in order to achieve lower costs and to obtain higher power, the sunlight received by the condensing lens is received by the condensing lens. A concentrating solar power generation device of a type that takes out electric power by irradiating a smaller solar cell element has been proposed (for example, see Patent Document 1).

  Since the concentrating solar power generation device condenses sunlight with a condenser lens and irradiates the solar cell element, the solar cell element has a small light receiving area that can receive sunlight collected by the optical system. Just prepare. That is, since the solar cell element having a size smaller than the light receiving area of the condensing lens may be used, the size of the solar cell element can be reduced, so that the usage amount of the solar cell element that is an expensive component in the solar power generation device The cost can be reduced.

  Due to such advantages, the concentrating solar power generation apparatus is being used for power supply in an area where power can be generated using a large area.

  In addition, in order to improve the condensing characteristic, the condensing lens is a primary optical system, and sunlight condensed by the primary optical system is incident on a secondary optical system arranged corresponding to the surface of the solar cell element. A concentrating solar power generation device having a configuration has been proposed (see, for example, Patent Document 2 to Patent Document 4).

  For example, when the technique disclosed in Patent Document 1 is put into practical use, when foreign matter (rain water, dust, or the like) enters from the outside of the cylindrical lens frame 18, the top of the light guide 47 attached to the solar battery cell 46. There was a problem that water droplets and dust entered into the light receiving area such as the end face and the light could not be received sufficiently. In addition, the lens frame 18 that supports the lens assembly 20 and the base panel 23 on which the solar cells 46 are mounted are each increased in size, and a gap may occur due to an assembly error.

JP-A-11-284217 JP 2002-289896 A JP 2002-289897 A JP 2002-289898 A

  The present invention has been made in view of such a situation, and includes an optical member that transmits condensed sunlight, a solar cell element that photoelectrically converts sunlight transmitted through the optical member, and a solar cell element. It is a solar cell provided with a placed receiver substrate, and includes a first adhesive part surrounding the solar cell element, a pedestal part adhered to the first adhesive part, and a resin sealing part covering the solar cell element. Therefore, it is possible to easily and accurately determine the constituent elements in the plane direction and the superimposing direction corresponding to the optical axis, and effectively irradiate the collected solar light to the solar cell element. A highly productive solar cell with improved heat resistance, weather resistance, and reliability by improving the power generation efficiency and power generation by preventing the influence of foreign matter on the solar cell element from being blocked from the outside The purpose is to provide.

  In addition, the present invention improves the power generation efficiency and power generation by improving the light condensing characteristics over a wide wavelength region by using a concentrating solar power generation module including the condensing lens and the solar cell according to the present invention. Another object of the present invention is to provide an inexpensive concentrating solar power generation module with high heat resistance, weather resistance, and reliability.

  Moreover, this invention is a solar cell manufacturing method which manufactures the solar cell which concerns on this invention, Comprising: The 1st adhesive agent application process which apply | coats a 1st adhesive agent, and the base which mounts a base part in a 1st adhesive agent The part mounting step, the first thermosetting step for forming the first adhesive portion, and the optical member disposing step for disposing the optical member (columnar optical member) on the fixed portion are performed, and the respective constituent members are sequentially stacked. Another object is to provide a solar cell manufacturing method capable of manufacturing a solar cell having high heat resistance, weather resistance, and reliability with high productivity with a simple process of combining them with high accuracy.

  Moreover, this invention is a solar cell manufacturing method which manufactures the solar cell which concerns on this invention, Comprising: The 1st adhesive agent application process which apply | coats a 1st adhesive agent, and the base which mounts a base part in a 1st adhesive agent A part mounting step, a second adhesive application step for applying the second adhesive to the pedestal portion, a pedestal covering portion mounting step for mounting the pedestal covering portion on the receiver substrate, a first adhesive portion and a second adhesive The first thermosetting step for forming the part and the columnar optical member step for arranging the columnar optical member are performed in a simple process in which the respective constituent members are stacked and aligned in order, and heat resistance is easily and accurately performed. Another object of the present invention is to provide a solar cell manufacturing method capable of manufacturing a solar cell having high reliability and weather resistance with high productivity.

  A solar cell according to the present invention includes an optical member that transmits condensed sunlight, a solar cell element that photoelectrically converts sunlight transmitted through the optical member, and a receiver substrate on which the solar cell element is placed A first adhesive portion formed in a frame shape that is bonded to the receiver substrate and surrounds the solar cell element; and the first adhesive that is in contact with the receiver substrate and surrounds the solar cell element And a resin sealing portion that is surrounded by the first adhesive portion and covers the solar cell element.

  With this configuration, the first adhesive portion and the pedestal portion are overlapped and connected to the receiver substrate and the solar cell element in the overlapping direction, so that the positioning of the resin sealing portion and the optical member with respect to the solar cell element corresponds to the optical axis. The solar cell element is effectively radiated to the solar cell element which is easily and accurately determined and collected in the planar direction and the superposition direction (height direction), and the solar cell element is cut off from the outside. As a result, it is possible to prevent the influence of foreign matter on the solar cell element, thereby improving the power generation efficiency and power generation, and improving the heat resistance, weather resistance, and reliability to provide a highly productive solar cell. be able to.

  In the solar cell according to the present invention, the optical member is a flat plate-shaped first flat optical member, and the first flat optical member is disposed between the first adhesive portion and the pedestal portion. It is characterized by being.

  With this configuration, the optical member (first flat plate optical member) can be easily and accurately positioned and fixed in the planar direction and the overlapping direction with respect to the first adhesive portion and the pedestal portion.

  In the solar cell according to the present invention, a beam-shaped flange portion provided with a second adhesive portion formed on the top of the pedestal portion, bonded to the second adhesive portion and extended in a direction parallel to the receiver substrate, A pedestal covering portion extending outward from the beam-like flange portion and having a coupling flange portion connected to the receiver substrate outside the pedestal portion is provided.

  With this configuration, the second adhesive portion and the pedestal covering portion can be easily and accurately positioned with respect to the receiver substrate, the solar cell element, the first adhesive portion, and the pedestal portion in the planar direction and the overlapping direction. The pedestal is fixed by the covering part (beam-like flange part and coupling flange part), and the pedestal part can be protected from the surroundings by the pedestal covering part, so that the physical strength of the pedestal part is improved. It can be set as a highly efficient solar cell.

  In the solar cell according to the present invention, the optical member is a flat plate-shaped second flat plate optical member, and the second flat plate optical member is placed on the top of the pedestal portion and has an outer peripheral end at the beam-shaped flange. It is covered with a part.

  With this configuration, the optical member (second flat plate optical member) can be easily and accurately placed and positioned with respect to the pedestal portion in the planar direction and the overlapping direction.

  In the solar cell according to the present invention, the optical member is a columnar optical member whose top surface is columnar than the bottom surface, and the columnar optical member is fixed by a fixing portion at an inner end of the beam-shaped flange portion. It is characterized by being.

  With this configuration, the optical member (columnar optical member) can be easily and accurately positioned with respect to the pedestal portion and the beam-shaped flange portion in the planar direction and the overlapping direction. On the other hand, positioning can be performed easily and with high accuracy.

  In the solar cell according to the present invention, the fixing portion is a vertical fixing portion that has a penetrating inclined surface that penetrates the columnar optical member and opposes the columnar optical member, and is erected on the inner end frame of the beam-shaped flange portion. It is characterized by.

  With this configuration, the columnar optical member can be easily and accurately positioned and fixed to the beam-like flange portion (vertical fixing portion) in the planar direction and the overlapping direction.

  A concentrating photovoltaic solar cell module according to the present invention includes a concentrating solar power generation module including a condensing lens that condenses sunlight and a solar cell that receives the collected sunlight and performs photoelectric conversion. The solar cell is a solar cell according to the present invention.

  With this configuration, it is possible to reliably improve the light collection characteristics over a wide wavelength region to improve the power generation efficiency and power generation, and to make a cheap concentrating solar power generation module with high heat resistance, weather resistance, and reliability. .

  The solar cell manufacturing method according to the present invention includes an optical member that transmits condensed sunlight, a solar cell element that photoelectrically converts sunlight transmitted through the optical member, and a receiver on which the solar cell element is mounted. A substrate, a first bonding portion formed in a frame shape that is bonded to the receiver substrate and surrounds the solar cell element, and abuts on the receiver substrate and surrounds the solar cell element and is bonded to the first bonding portion A solar cell manufacturing method for manufacturing a solar cell comprising a pedestal portion and a fixing portion for fixing the optical member with reference to the pedestal portion, wherein the first adhesive forming the first adhesive portion is the receiver. A first adhesive application step of applying to the substrate; a pedestal portion placement step of attaching the pedestal portion to the first adhesive and placing the pedestal portion on the receiver substrate; and heating the first adhesive to A first thermosetting step for forming one adhesive portion; Characterized in that it comprises an optical member disposing step of disposing the optical member serial fixing unit.

  By this structure, a 1st adhesive agent application process, a base part mounting process, a 1st thermosetting process, and an optical member arrangement | positioning process are performed, and each structural member (a 1st adhesive agent, a base part, an optical member) is piled up in order. With a simple process of positioning, it is possible to easily and accurately manufacture a solar cell with high heat resistance, weather resistance, and reliability with high productivity.

  The solar cell manufacturing method according to the present invention includes an optical member that transmits condensed sunlight, a solar cell element that photoelectrically converts sunlight transmitted through the optical member, and a receiver on which the solar cell element is mounted. A substrate, a first bonding portion formed in a frame shape that is bonded to the receiver substrate and surrounds the solar cell element, and abuts on the receiver substrate and surrounds the solar cell element and is bonded to the first bonding portion A pedestal part; a resin sealing part that is surrounded by the first adhesive part and covers the solar cell element; and a second adhesive part that is formed on the top of the pedestal part, and is bonded to the second adhesive part. A base cover having a beam-like flange portion extended in a direction parallel to the receiver substrate, and a coupling flange portion extended outward from the beam-like flange portion and connected to the receiver substrate outside the base portion. And a column as the optical member It is a solar cell manufacturing method which manufactures a solar cell provided with the fixing | fixed part which fixes said columnar optical member, Comprising: The 1st adhesive which apply | coats the 1st adhesive agent which forms the said 1st adhesion part to the said receiver board | substrate An application step, a pedestal portion placement step of attaching the pedestal portion to the first adhesive and placing the pedestal portion on the receiver substrate, and a second adhesive forming the second adhesive portion on the top of the pedestal portion A second adhesive applying step to be applied; and a vertical fixing portion as the fixing portion that has a penetrating inclined surface that penetrates and opposes the columnar optical member and is erected on the inner end frame of the beam-like flange portion A pedestal covering portion placing step of attaching the pedestal covering portion to the second adhesive and placing the pedestal covering portion on the receiver substrate; and heating the first adhesive and the second adhesive to the first adhesive portion And a first thermosetting step for forming the second adhesive portion, A columnar optical member disposing step for disposing the columnar optical member so as to be in contact with and fixed to the through inclined surface, and a sealing resin for injecting a sealing resin for resin-sealing the solar cell element into the inner region of the first adhesive portion And an injection step.

  With this configuration, the first adhesive application step, the pedestal portion placement step, the second adhesive application step, the pedestal covering portion placement step (fixed portion placement step), the columnar optical member placement step (optical member placement step), the sealing The stop resin injection step is executed, and each component (first adhesive portion, pedestal portion, second adhesive portion, pedestal covering portion (fixed portion = vertical fixed portion), resin sealing portion, optical member (columnar optical member) ) In order and in a simple process of aligning, a solar cell having high heat resistance, weather resistance, and high reliability can be manufactured with high productivity with high accuracy.

  According to the solar cell of the present invention, an optical member that transmits the concentrated sunlight, a solar cell element that photoelectrically converts sunlight transmitted through the optical member, and a receiver substrate on which the solar cell element is placed; A first adhesion part formed in a frame shape that is adhered to the receiver substrate and surrounds the solar cell element, and is adhered to the first adhesion part that is in contact with the receiver substrate and surrounds the solar cell element Since it comprises a pedestal part and a resin sealing part that is surrounded by the first adhesive part and covers the solar cell element, the first adhesive part and the pedestal part are stacked in the overlapping direction on the receiver substrate and the solar cell element. The effect of the sunlight that is collected and determined with high precision and accuracy in the plane direction and the superimposition direction (height direction) that match the optical axis with the resin sealing part and optical member positioning relative to the solar cell element. Irradiate the solar cell element, Since it is possible to block the solar cell element from the outside air and prevent the influence of the outside air on the solar cell element, it is possible to obtain a highly productive solar cell with improved heat resistance, weather resistance, and reliability. There is an effect.

  According to the concentrating solar solar cell module according to the present invention, concentrating solar light including a condensing lens that condenses sunlight and a solar cell that receives the collected sunlight and performs photoelectric conversion. Since the solar cell is the solar cell according to the present invention, it is a power generation module, so that the light collection characteristics with respect to a wide wavelength region are reliably improved to improve the power generation efficiency and power generation, and the heat resistance, weather resistance, reliability The effect that it can be set as a highly efficient and cheap concentrating solar power generation module is produced.

  According to the solar cell manufacturing method of the present invention, the optical member that transmits the concentrated sunlight, the solar cell element that photoelectrically converts the sunlight transmitted through the optical member, and the receiver on which the solar cell element is mounted. A substrate, a first adhesive portion that is bonded to the receiver substrate and formed in a frame shape surrounding the solar cell element, a pedestal portion that is in contact with the receiver substrate and surrounds the solar cell element, and is bonded to the first adhesive portion; A solar cell manufacturing method for manufacturing a solar cell including a fixing portion that fixes an optical member with reference to a portion, wherein a first adhesive application that applies a first adhesive forming a first adhesive portion to a receiver substrate A step, a pedestal portion placement step of attaching the pedestal portion to the first adhesive and placing it on the receiver substrate, a first thermosetting step of heating the first adhesive to form the first adhesive portion, and fixing An optical member disposing step of disposing an optical member on the part The first adhesive application step, the pedestal portion placement step, the first thermosetting step, and the optical member placement step are executed, and each component member (first adhesive, pedestal portion, optical member (columnar optical member)) With the simple process of stacking and aligning the layers, it is possible to easily and highly accurately manufacture a solar cell with high heat resistance, weather resistance, and reliability with high productivity.

  According to the solar cell manufacturing method of the present invention, the optical member that transmits the concentrated sunlight, the solar cell element that photoelectrically converts the sunlight transmitted through the optical member, and the receiver on which the solar cell element is mounted. A substrate, a first adhesive portion formed in a frame shape that is bonded to the receiver substrate and surrounds the solar cell element, a pedestal portion that is in contact with the receiver substrate and surrounds the solar cell element and is bonded to the first adhesive portion, A resin sealing portion that is surrounded by one bonding portion and covers the solar cell element, and a second bonding portion that is formed on the top of the pedestal portion, and is bonded to the second bonding portion and extends in a direction parallel to the receiver substrate. A pedestal covering portion having a beam-like flange portion, a coupling flange portion that extends outward from the beam-like flange portion and is connected to the receiver substrate outside the pedestal portion, and a columnar optical member that is columnar as an optical member With a fixing part for fixing A solar cell manufacturing method for manufacturing a battery, comprising: a first adhesive applying step of applying a first adhesive forming a first adhesive portion to a receiver substrate; and a pedestal portion bonded to the first adhesive to receive the receiver substrate A pedestal portion placing step, a second adhesive applying step for applying a second adhesive forming the second adhesive portion to the top of the pedestal portion, and a through inclined surface that penetrates the columnar optical member and faces each other. A base covering portion mounting step in which a base covering portion having a vertical fixing portion as a fixing portion erected on the inner end frame of the beam-like flange portion is bonded to the second adhesive and placed on the receiver substrate And a first thermosetting step of heating the first adhesive and the second adhesive to form the first adhesive portion and the second adhesive portion, and a columnar optical member disposed so as to contact and fix the penetrating inclined surface The columnar optical member arranging step and the sealing resin for resin-sealing the solar cell element are the first. And a sealing resin injection step for injecting into the inner region of the attachment portion, so that the first adhesive application step, the pedestal portion placement step, the second adhesive application step, the pedestal covering portion placement step (fixed portion placement step) ), Columnar optical member arrangement step (optical member arrangement step), sealing resin injection step, and each component member (first bonding portion, pedestal portion, second bonding portion, pedestal covering portion (fixing portion = vertical fixing) Part), resin-sealed part, and columnar optical member (optical member)) are stacked and aligned in order, making it easy to produce highly accurate solar cells with high heat resistance, weather resistance and reliability with high productivity. There exists an effect that it can manufacture.

It is sectional drawing which shows typically the cross-sectional state of schematic structure of the solar cell which concerns on Embodiment 1 of this invention. It is sectional drawing which shows typically the cross-sectional state of schematic structure of the solar cell which concerns on Embodiment 2 of this invention. It is sectional drawing which shows typically the cross-sectional state of schematic structure of the solar cell which concerns on Embodiment 3 of this invention. It is sectional drawing which shows typically the cross-sectional state of schematic structure of the solar cell and concentrating photovoltaic power generation module which concern on Embodiment 4 of this invention. It is an expanded sectional view which shows the cross-sectional state of the schematic structure which expanded the solar cell shown in FIG. It is a perspective view shown in the state which looked down at schematic structure of the solar cell shown in FIG. It is a perspective view which shows the arrangement | positioning state of the solar cell element of the solar cell shown in FIG. 4, and a receiver board | substrate. It is a perspective view which shows schematic structure of the base part of the solar cell shown in FIG. It is sectional drawing which shows the cross-sectional state of the base part shown in FIG. It is a perspective view which shows schematic structure of the base coating | coated part of a solar cell shown in FIG. 4, a fixing | fixed part, and a columnar optical member. It is sectional drawing which shows the cross-sectional state of the base coating | coated part shown in FIG. 10, a fixing | fixed part, and a columnar optical member. It is a perspective view which shows schematic structure of the cap part shown in FIG. It is sectional drawing which shows the cross-sectional shape of the cap part shown in FIG. It is a flowchart which shows the manufacturing process of the solar cell manufacturing method which manufactures the solar cell which concerns on Embodiment 5 of this invention. The process perspective view which shows the state which sets a receiver board | substrate to a positioning jig as a preparatory process for apply | coating the 1st adhesive agent used as a 1st adhesion part in the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. FIG. FIG. 16 is a process perspective view illustrating a state where the receiver substrate is set on the positioning jig in the preparation process of FIG. 15. It is a process perspective view which shows the state which apply | coats a 1st adhesion part at the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. It is a process perspective view which shows the state which mounted the base part on the receiver board | substrate at the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. It is a process perspective view which shows the state which apply | coats a 2nd adhesion part to a base part by the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. It is a process perspective view which shows the state which mounted the base covering part in the base part by the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. It is a process perspective view which shows the state which inject | pours the sealing resin which resin-seals a solar cell element into the base part by the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. It is a process perspective view which shows the state which inserted the columnar optical member in the through-hole of the vertical fixing | fixed part at the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. It is a process perspective view which shows the state which apply | coats a translucent adhesive agent to the top surface of a columnar optical member at the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. It is a process perspective view which shows the state which apply | coats a 3rd adhesive agent to a vertical fixing | fixed part at the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. It is a process perspective view which shows the state which mounted the translucent protective plate in the vertical fixing | fixed part at the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention. It is a process perspective view which shows the state which mounted the cap part in the vertical fixing | fixed part at the manufacturing process of the solar cell manufacturing method which concerns on Embodiment 5 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1>
Based on FIG. 1, the solar cell which concerns on this Embodiment, and the solar cell manufacturing method which manufactures this solar cell are demonstrated.

  FIG. 1 is a cross-sectional view schematically showing a cross-sectional state of the schematic configuration of the solar cell according to Embodiment 1 of the present invention.

  The solar cell 21 according to the present embodiment includes an optical member 40 (first flat plate optical member 40f) that transmits the concentrated sunlight Ls and a solar cell element that photoelectrically converts the sunlight Ls that has passed through the optical member 40. 23 and a receiver substrate 22 on which the solar cell element 23 is placed.

  The solar cell 21 is bonded to the receiver substrate 22 and has a first adhesive portion 31 formed in a frame shape surrounding the solar cell element 23, and the first adhesive portion 31 is in contact with the receiver substrate 22 and surrounds the solar cell element 23. A pedestal portion 45 that is bonded and a resin sealing portion 34 that is surrounded by the first bonding portion 31 and covers the solar cell element 23 are provided.

  Accordingly, since the first adhesive portion 31 and the pedestal portion 45 are overlapped and connected to the receiver substrate 22 and the solar cell element 23 in the overlapping direction, the resin sealing portion 34 and the optical member 40 (first member for the solar cell element 23). The flattened optical member 40f) is easily and accurately determined in the plane direction and the superimposing direction (height direction) corresponding to the optical axis Lax, and the collected sunlight Ls is effectively supplied to the solar cell element 23. Irradiation and the solar cell element 23 can be cut off from the outside to prevent the influence of foreign matters on the solar cell element, thereby improving the power generation efficiency and power generation, It can be set as the highly productive solar cell 21 which improved the weather resistance and reliability.

  That is, in the solar cell 21 according to the present embodiment, for example, the receiver substrate 22, the solar cell element 23, the first bonding portion 31, the pedestal portion 45, and the optical member in the planar direction and the overlapping direction corresponding to the optical axis Lax. It becomes possible to align 40 by overlapping 40 in order.

  The optical member 40 is a first flat plate optical member 40f having a flat plate shape, and the first flat plate optical member 40f is disposed between the first adhesive portion 31 and the pedestal portion 45 in the overlapping direction. . Therefore, the optical member 40 (first flat plate optical member 40f) can be positioned and fixed easily and accurately in the planar direction and the superimposing direction with respect to the first adhesive portion 31 and the pedestal portion 45. Further, since the optical member 40 is disposed in the inner region of the outer peripheral frame 45f of the pedestal portion 45 in the horizontal direction, the optical member 40 can be accurately positioned with respect to the pedestal portion 45.

  The pedestal portion 45 is bonded to the receiver substrate 22 by a first bonding portion 31 disposed between the bottom surface recess 45 d formed on the bottom surface 45 c of the pedestal portion 45 and the receiver substrate 22. That is, the first adhesive portion 31 is formed between the bottom surface recess 45 d of the pedestal portion 45 and the receiver substrate 22.

  Therefore, the base 45 and the receiver substrate 22 can be bonded and fixed with high accuracy via the first bonding portion 31. Note that the pedestal portion 45 is preferably frame-like, similar to the first adhesive portion 31, but is not limited thereto, and may be a quadruped structure, for example. That is, it is sufficient if the structure is sufficiently bonded to the first bonding portion 31 and is stably fixed to the receiver substrate 22. Since the position of the base portion 45 is determined with high accuracy, the focal length of the optical member 40 can be matched with high accuracy. The four-leg structure (modified example) of the pedestal portion 45 will be further described in the fifth embodiment.

  Further, in order to prevent foreign matters (rain water and dust) from entering, the gap between the connecting portions such as the lens frame 51 (see FIG. 4) and the base plate 52 (same as above) is reduced to guide the sunlight Ls. When the sealing degree of the space to be increased is increased, the gas (for example, air) containing moisture in the light guide region from the condenser lens 50 (same as above) to the solar cell element 23 or the optical member 40 is changed in the temperature. Due to the accompanying dew condensation phenomenon, water droplets may be generated in the light guide region and may adhere to the receiver substrate 22 or the like.

  There is a risk that water droplets adhering to the receiver substrate 22 and the like may flow into the surface of the solar cell element 23 due to a change in tracking angle of the receiver substrate 22 and the like when tracking sunlight Ls. However, the solar cell element 23 is blocked from the light guide region side by the first adhesive portion 31, the resin sealing portion 34, and the like, so that foreign matter (water droplets) from the light guide region side is mixed into the solar cell element 23. It becomes possible to prevent the influence.

  Further, a gas (for example, air, nitrogen, or the like) that blocks the surface region of the solar cell element 23 (for example, the space region between the resin sealing portion 34 and the bottom surface 40b of the first flat plate optical member 40f) from the light guide region. Or when it is set as the state filled with argon), it is preferable to fill the gas with the lowest possible humidity. Further, in terms of reducing the absolute amount of moisture, it is preferable to reduce the volume of the region blocked from the light guide region side as much as possible.

  Alternatively, the surface region of the solar cell element 23 may be sealed with a sealing resin instead of gas. In order to reduce the absolute amount of the filler and reduce the influence of expansion and contraction, it is preferable to reduce the volume of the region blocked from the light guide region side as much as possible. Further, a blocking region filled with gas may be provided on the light guide region side.

  Further, the blocking region seals the bypass diode 24 around the solar cell element 23, the wire 29 (see FIG. 7), the wiring member, the first connection pattern 25 (same as above), and the second connection pattern 26 (same as before). Also good. In this way, there is no possibility of causing a short circuit between the output extraction terminals due to adhesion of water droplets or dust.

  The first flat optical member 40f is disposed between the bottom surface recess 45d and the first adhesive portion 31, and is in close contact with the first adhesive portion 31, so that the first flat optical member 40f is positioned easily and with high accuracy, and the solar cell element 23 is connected to the outside. Can be protected from the environment.

  The resin sealing portion 34 that covers the solar cell element 23 is formed by covering the receiver substrate 22 between the optical member 40 (first flat plate optical member 40f) and the receiver substrate 22. Therefore, the solar cell element 23 and the connection member connected to the solar cell element 23 (such as the wire 29 (see FIG. 7) connecting the surface electrode and the extraction electrode of the solar cell element 23) are reliably protected (insulated). ), It is possible to ensure reliability.

  The resin sealing portion 34 can be brought into contact with the bottom surface 40b (inner surface) of the optical member 40. That is, in FIG. 1, the space region is formed between the resin sealing portion 34 and the first flat optical member 40 f, but the space region is completely filled with the sealing resin 34 r (resin sealing portion 34). It is also possible to have a shape.

  By filling the space region with the resin sealing portion 34, the influence of the gas (for example, air) existing in the space region can be suppressed. That is, the gas existing between the optical member 40 (first flat plate optical member 40f) and the resin sealing portion 34 is excluded, and the optical member 40 (first flat plate optical member 40f) and the resin sealing portion 34 are removed. , And the sunlight Ls can be efficiently guided to the solar cell element 23.

  Further, the outer periphery of the resin sealing portion 34 is surrounded by a first adhesive portion 31 in a frame shape. Therefore, it is possible to reliably cover and protect (insulate) the members (for example, the solar cell element 23, the bypass diode 24, the wire 29, and the wiring member) disposed on the surface of the receiver substrate 22 inside the base portion 45. Therefore, the withstand voltage and weather resistance can be improved and the reliability can be improved.

  A concentrating solar power generation module 20 (see FIG. 4) on which the solar cell 21 according to the present embodiment is mounted may be used. That is, the concentrating sunlight provided with the condensing lens 50 (same as above) that condenses the sunlight Ls and the solar cell 21 according to the present embodiment that receives the collected sunlight Ls and performs photoelectric conversion. The power generation module 20 can be obtained. Therefore, it is possible to reliably improve the light condensing characteristics over a wide wavelength region to improve the power generation efficiency and the generated power, and to provide an inexpensive concentrating solar power generation module 20 with high heat resistance, weather resistance, and reliability.

  The receiver board | substrate 22 is provided with the attachment hole 22h for applying the solar cell 21 to the concentrating solar power generation module 20, for example.

  The application of the solar cell 21 to the concentrating solar power generation module 20 will be described in detail in the fourth embodiment.

  A solar cell manufacturing method for manufacturing the solar cell 21 according to the present embodiment will be described. In addition, about a manufacturing process, since a typical example is shown in detail in Embodiment 4, only an outline is only demonstrated in this Embodiment.

  The solar cell manufacturing method according to the present embodiment includes an optical member 40 that transmits condensed sunlight Ls, a solar cell element 23 that photoelectrically converts sunlight Ls that has passed through the optical member 40, and a solar cell element 23. Is mounted on the receiver substrate 22, the first adhesive portion 31 is formed in a frame shape that is bonded to the receiver substrate 22 and surrounds the solar cell element 23, and the receiver substrate 22 is in contact with and surrounds the solar cell element 23. 1 is a solar cell manufacturing method for manufacturing a solar cell 21 including a pedestal portion 45 bonded to one bonding portion 31 and a resin sealing portion 34 that is surrounded by the first bonding portion 31 and covers the solar cell element 23.

  In the solar cell manufacturing method according to the present embodiment, a first adhesive application step for applying the first adhesive 31r forming the first adhesive portion 31 to the receiver substrate 22 and a flat plate as the optical member 40 are provided. A first flat plate optical member arranging step (an optical member arranging step of arranging the optical member 40) for arranging the one flat plate optical member 40f on the first adhesive 31r, and a receiver board by bonding the pedestal 45 to the first adhesive 31r. A pedestal portion placement step for placing on 22, a first thermosetting step for heating the first adhesive 31 r to form the first adhesion portion 31, and a sealing resin 34 r for resin-sealing the solar cell element 23. A sealing resin injection step of injecting the inner region of the first adhesive portion 31.

  Therefore, the first adhesive application step, the first flat plate optical member placement step (optical member placement step), the pedestal portion placement step, and the sealing resin injection step are executed. The heat-resisting, weather-resistant, and highly reliable sun can be easily and highly accurately by a simple process of stacking and aligning the stop resin portion 34, the first flat optical member 40f (optical member 40), and the pedestal portion 45) in order. The battery 21 can be manufactured with high productivity.

  Further, the sealing resin injection step can be performed from before the first adhesive application step to the first flat plate optical member placement step. Preferably, it implements after the 1st adhesive agent application process to the 1st flat plate optical member arrangement process.

  The sealing resin 34r is preferably subjected to a defoaming process and a thermosetting process. That is, in the solar cell manufacturing method according to the present embodiment, a defoaming process for performing defoaming on the sealing resin 34r, and a second thermosetting process for heating and thermosetting the sealing resin 34r. Prepare. Therefore, the highly reliable resin sealing portion 34 can be formed easily and with high accuracy.

<Embodiment 2>
Based on FIG. 2, the solar cell which concerns on this Embodiment, and the solar cell manufacturing method which manufactures this solar cell are demonstrated. Since the basic configuration of the solar cell according to the present embodiment is the same as that of the solar cell 21 according to the first embodiment, the description will be appropriately omitted by using the reference numerals, and different items will be mainly described.

  FIG. 2 is a cross-sectional view schematically showing a cross-sectional state of the schematic configuration of the solar cell according to Embodiment 2 of the present invention.

  The solar cell 21 according to the present embodiment includes an optical member 40 (second flat plate optical member 40s) that transmits the concentrated sunlight Ls and a solar cell element that photoelectrically converts the sunlight Ls that has passed through the optical member 40. 23 and a receiver substrate 22 on which the solar cell element 23 is placed.

  The solar cell 21 is bonded to the receiver substrate 22 and has a first adhesive portion 31 formed in a frame shape surrounding the solar cell element 23, and the first adhesive portion 31 is in contact with the receiver substrate 22 and surrounds the solar cell element 23. A pedestal portion 45 that is bonded and a resin sealing portion 34 that is surrounded by the first bonding portion 31 and covers the solar cell element 23 are provided.

  Accordingly, since the first adhesive portion 31 and the pedestal portion 45 are overlapped and connected to the receiver substrate 22 and the solar cell element 23 in the overlapping direction, the resin sealing portion 34 and the optical member 40 (second member) for the solar cell element 23 are connected. The flattened optical member 40s) is easily and accurately determined in the plane direction and the superimposing direction (height direction) corresponding to the optical axis Lax, and the collected sunlight Ls is effectively supplied to the solar cell element 23. Irradiation and the solar cell element 23 can be cut off from the outside to prevent the influence of foreign matters on the solar cell element, thereby improving the power generation efficiency and power generation, It can be set as the highly productive solar cell 21 which improved the weather resistance and reliability.

  That is, in the solar cell 21 according to the present embodiment, for example, the receiver substrate 22, the solar cell element 23, the first bonding portion 31, the pedestal portion 45, and the optical member in the planar direction and the overlapping direction corresponding to the optical axis Lax. 40 can be aligned and stacked.

  The pedestal portion 45 is bonded to the receiver substrate 22 by a first bonding portion 31 disposed between the bottom surface recess 45 d formed on the bottom surface 45 c of the pedestal portion 45 and the receiver substrate 22.

  Further, the solar cell 21 according to the present embodiment includes a second adhesive portion 32 formed on the top portion 45b of the pedestal portion 45, and is bonded to the second adhesive portion 32 and extended in a direction parallel to the receiver substrate 22. The base cover portion 30b has a beam-like flange portion 30c and a coupling flange portion 30d that extends outward from the beam-like flange portion 30c and is connected to the receiver substrate 22 outside the base portion 45.

  Therefore, the second adhesive portion 32 and the pedestal covering portion 30b are easily and accurately positioned in the planar direction and the overlapping direction with respect to the receiver substrate 22, the solar cell element 23, the first adhesive portion 31, and the pedestal portion 45, and the second Since the base portion 45 can be fixed by the adhesive portion 32 and the base cover portion 30b (the beam-like flange portion 30c and the coupling flange portion 30d), and the base portion 45 can be protected from the surroundings by the base cover portion 30b. A highly reliable solar cell 21 in which the physical strength of the pedestal 45 is improved can be obtained.

  The optical member 40 is a flat plate-shaped second flat optical member 40s, and the second flat optical member 40s is placed on the top 45b of the pedestal 45 in the overlapping direction, and the outer peripheral end 40st is a beam-shaped flange. Covered by the portion 30c. Therefore, the optical member 40 (second flat plate optical member 40s) can be easily and highly accurately placed and positioned with respect to the pedestal portion 45 in the planar direction and the overlapping direction. Further, since the optical member 40 is disposed in the inner region of the outer peripheral frame 45f of the pedestal portion 45 in the horizontal direction, the optical member 40 can be accurately positioned with respect to the pedestal portion 45.

  The resin sealing portion 34 that covers the solar cell element 23 is formed by covering the receiver substrate 22 between the optical member 40 (second flat plate optical member 40 s) and the receiver substrate 22. Therefore, the solar cell element 23 and the connection member connected to the solar cell element 23 (such as the wire 29 (see FIG. 7) connecting the surface electrode and the extraction electrode of the solar cell element 23) are reliably protected (insulated). ), It is possible to ensure reliability.

  The resin sealing portion 34 can be brought into contact with the bottom surface 40b (inner surface) of the optical member 40. That is, in FIG. 2, although it has the shape which has a space area | region between the resin sealing part 34 and the 2nd flat plate optical member 40s, a space area | region is completely filled with sealing resin 34r (resin sealing part 34). It is also possible to have a shape.

  By filling the space region with the resin sealing portion 34, the influence of the gas (for example, air) existing in the space region can be suppressed. That is, the gas existing between the optical member 40 (second flat plate optical member 40s) and the resin sealing portion 34 is excluded, and the optical member 40 (second flat plate optical member 40s) and the resin seal are sealed. It is possible to suppress the change in the refractive index between the unit 34 and the sunlight Ls to the solar cell element 23 efficiently.

  Further, the outer periphery of the resin sealing portion 34 is surrounded by a first adhesive portion 31 in a frame shape. Therefore, it is possible to reliably cover and protect the members (for example, the solar cell element 23, the bypass diode 24, the wire 29, and the wiring member) disposed on the surface of the receiver substrate 22 inside the base portion 45. Therefore, the withstand voltage and the weather resistance can be improved and the reliability can be improved.

  A pedestal covering portion mounting hole 30j aligned with the mounting hole 22h is formed in the coupling flange portion 30d. Therefore, the base covering portion 30b (the coupling flange portion 30d) can be easily and accurately positioned with respect to the receiver substrate 22.

  A concentrating solar power generation module 20 (see FIG. 4) on which the solar cell 21 according to the present embodiment is mounted may be used. Since the mode of application is the same as in the first embodiment, the details will be described in the fourth embodiment.

  A solar cell manufacturing method for manufacturing the solar cell 21 according to the present embodiment will be described. In addition, about a manufacturing process, since a typical example is shown in detail in Embodiment 4, only an outline is only demonstrated in this Embodiment.

  The solar cell manufacturing method according to the present embodiment includes an optical member 40 that transmits condensed sunlight Ls, a solar cell element 23 that photoelectrically converts sunlight Ls that has passed through the optical member 40, and a solar cell element 23. Is mounted on the receiver substrate 22, the first adhesive portion 31 is formed in a frame shape that is bonded to the receiver substrate 22 and surrounds the solar cell element 23, and the receiver substrate 22 is in contact with and surrounds the solar cell element 23. The pedestal portion 45 bonded to the first bonding portion 31, the second bonding portion 32 formed on the top portion 45 b of the pedestal portion 45, and the resin sealing portion 34 that is surrounded by the first bonding portion 31 and covers the solar cell element 23. A beam-like flange portion 30c that is bonded to the second bonding portion 32 and extends in a direction parallel to the receiver substrate 22, and a receiver substrate that extends outward from the beam-like flange portion 30c and outside the pedestal portion 45. Connected to 22 A solar cell manufacturing method for manufacturing the solar cell 21 comprises a pedestal covering portion 30b and a coupling flange portion 30d that.

  In the solar cell manufacturing method according to the present embodiment, the first adhesive application step of applying the first adhesive 31r forming the first adhesive portion 31 to the receiver substrate 22, and the base portion 45 on the first adhesive 31r. A pedestal mounting step for bonding and mounting on the receiver substrate 22, a second adhesive applying step for applying a second adhesive 32r forming the second bonding portion 32 to the top 45b of the pedestal 45, and an optical member The second flat plate optical member 40s, which is flat as 40, is disposed on the top 45b of the pedestal 45, the second flat plate optical member disposing step (the optical member disposing step of disposing the optical member 40), and the pedestal covering portion 30b. 2 A base covering portion mounting step for bonding to the adhesive 32r and mounting on the receiver substrate 22, and heating the first adhesive and the second adhesive 32r to form the first adhesive portion 31 and the second adhesive portion 32 The first thermosetting step and the sun Motoko Ike 23 and a sealing resin injection step of injecting a sealing resin 34r the resin sealing the inner region of the first adhesive portion 31.

  Therefore, the first adhesive application step, the pedestal portion placement step, the second adhesive application step, the second flat plate optical member placement step (optical member placement step), the base cover portion placement step, and the sealing resin injection step are executed. Therefore, each component (the 1st adhesion part 31, the base part 45, the 2nd adhesion part 32, the resin sealing part 34, the 2nd flat plate optical member 40s (optical member 40), and the base covering part 30b) is piled up in order. With a simple process of aligning, it becomes possible to manufacture the solar cell 21 having high heat resistance, weather resistance, and reliability with high productivity with high accuracy.

  In addition, the sealing resin injection step can be performed from before the first adhesive application step to the second flat plate optical member placement step. Preferably, it implements after forming the 1st adhesion part 31 at the 1st thermosetting process until the 2nd flat plate optical member arrangement process.

<Embodiment 3>
Based on FIG. 3, the solar cell which concerns on this Embodiment, and the solar cell manufacturing method which manufactures this solar cell are demonstrated. Since the basic configuration of the solar cell according to the present embodiment is the same as that of the solar cell 21 of the first embodiment and the second embodiment, the description is appropriately omitted by using the reference numerals, and mainly different matters. explain.

  FIG. 3 is a cross-sectional view schematically showing a cross-sectional state of the schematic configuration of the solar cell according to Embodiment 3 of the present invention.

  The solar cell 21 according to the present embodiment includes an optical member 40 (columnar optical member 40p) that transmits the concentrated sunlight Ls, and a solar cell element 23 that photoelectrically converts the sunlight Ls that has passed through the optical member 40. And a receiver substrate 22 on which the solar cell element 23 is placed.

  The solar cell 21 is bonded to the receiver substrate 22 and has a first adhesive portion 31 formed in a frame shape surrounding the solar cell element 23, and the first adhesive portion 31 is in contact with the receiver substrate 22 and surrounds the solar cell element 23. A pedestal portion 45 that is bonded and a resin sealing portion 34 that is surrounded by the first bonding portion 31 and covers the solar cell element 23 are provided.

  Accordingly, the first adhesive portion 31 and the pedestal portion 45 are overlapped and connected to the receiver substrate 22 and the solar cell element 23 in the overlapping direction, so that the resin sealing portion 34 and the optical member 40 (columnar optics) for the solar cell element 23 are connected. The solar cell element 23 is effectively irradiated with the condensed sunlight Ls determined and easily and accurately in the planar direction and the superimposing direction (height direction) corresponding to the optical axis Lax. Moreover, since it is possible to block the solar cell element 23 from the outside and prevent an influence on the solar cell element due to the entry of foreign matter from the outside, the power generation efficiency and the generated power are improved, and the heat resistance and weather resistance are improved. Thus, the solar cell 21 with improved productivity and improved reliability can be obtained.

  That is, in the solar cell 21 according to the present embodiment, for example, the receiver substrate 22, the solar cell element 23, the first bonding portion 31, the pedestal portion 45, and the optical member in the planar direction and the overlapping direction corresponding to the optical axis Lax. It becomes possible to align 40 by overlapping 40 in order.

  Further, the solar cell 21 according to the present embodiment includes a second adhesive portion 32 formed on the top portion 45b of the pedestal portion 45, and is bonded to the second adhesive portion 32 and extended in a direction parallel to the receiver substrate 22. The base cover portion 30b has a beam-like flange portion 30c and a coupling flange portion 30d that extends outward from the beam-like flange portion 30c and is connected to the receiver substrate 22 outside the base portion 45.

  Therefore, the second adhesive portion 32 and the pedestal covering portion 30b are easily and accurately positioned in the planar direction and the overlapping direction with respect to the receiver substrate 22, the solar cell element 23, the first adhesive portion 31, and the pedestal portion 45, and the second Since the base portion 45 can be fixed by the adhesive portion 32 and the base cover portion 30b (the beam-like flange portion 30c and the coupling flange portion 30d), and the base portion 45 can be protected from the surroundings by the base cover portion 30b. A highly reliable solar cell 21 in which the physical strength of the pedestal 45 is improved can be obtained.

  The optical member 40 is a columnar optical member 40p having a top surface 40a having a columnar shape larger than the bottom surface 40b. The columnar optical member 40p is fixed to the fixing portion 30 (fitting fixing portion 30r) at the inner end of the beam-shaped flange portion 30c. ).

  Therefore, the optical member 40 (columnar optical member 40p) can be easily and highly accurately positioned in the planar direction and the overlapping direction with respect to the pedestal 45 and the beam-shaped flange portion 30c. Positioning with respect to the battery element 23 can be performed easily and with high accuracy.

  The bottom surface 40b of the columnar optical member 40p has an area corresponding to the solar cell element 23, for example, an area corresponding to the effective light receiving area of the solar cell element 23. That is, by making the bottom surface 40b equal to the effective light receiving area of the solar cell element 23, it is possible to prevent unnecessary irradiation of the sunlight Ls, thereby preventing temperature rise due to solar energy and improving power generation efficiency. be able to.

  Moreover, since the top surface 40a of the columnar optical member 40p has a larger area than the bottom surface 40b, the condensed sunlight Ls can be reliably incident on the columnar optical member 40p.

  In addition, since the optical member 40 (columnar optical member 40p) is disposed in the inner region of the outer peripheral frame 45f of the pedestal portion 45 in the horizontal direction, the optical member 40 can be accurately positioned with respect to the pedestal portion 45. Specifically, the optical member 40 (columnar optical member 40p) is positioned with respect to the fitting fixing portion 30r (fixing portion 30), and the fitting fixing portion 30r is a beam-like flange portion 30c (pedestal covering portion 30b). The beam-shaped flange portion 30c is positioned with respect to the pedestal portion 45 (receiver substrate 22).

  Therefore, the fixing part 30 (fitting fixing part 30r) fixes the optical member 40 with the pedestal part 45 as a reference. That is, the solar cell 21 includes a fixing portion 30 (fitting fixing portion 30r) that fixes the optical member 40 with the pedestal portion 45 as a reference.

  In the solar cell 21 according to the present embodiment, the fixing portion 30 is a fitting fixing portion 30r that is fitted to the inner end frame 30ct of the beam-like flange portion 30c and fixes the columnar optical member 40p. Therefore, the columnar optical member 40p can be easily and accurately bonded and fixed to the beam-like flange portion 30c.

  Since the inner periphery of the fitting fixing portion 30r is inclined in advance so as to face the optical path inclined surface 40c of the columnar optical member 40p, the columnar optical member 40p is positioned in a self-aligning manner with respect to the fitting fixing portion 30r. It becomes possible to match. In addition, the fitting fixing | fixed part 30r can be previously formed as a molded article using a suitable synthetic resin, and can be formed by fitting in the inner side end frame 30ct.

  The resin sealing portion 34 covering the solar cell element 23 is formed by covering the receiver substrate 22 between the optical member 40 (columnar optical member 40p) and the receiver substrate 22. Moreover, the resin sealing part 34 is made to contact the bottom face 40b of the optical member 40 (columnar optical member 40p). That is, the space region between the resin sealing portion 34 and the columnar optical member 40p (bottom surface 40b) is completely filled with the sealing resin 34r (resin sealing portion 34).

  Therefore, the solar cell Ls is efficiently produced by preventing the refractive index from being fluctuated due to the gas (for example, air) existing in the space region between the optical member 40 (columnar optical member 40p) and the resin sealing portion 34. The light can be guided to the element 23.

  A concentrating solar power generation module 20 (see FIG. 4) on which the solar cell 21 according to the present embodiment is mounted may be used. In addition, since the application mode of the solar cell 21 in the concentrating solar power generation module 20 is the same as that in the first embodiment and the second embodiment, the details will be described in the fourth embodiment.

  A solar cell manufacturing method for manufacturing the solar cell 21 according to the present embodiment will be described. In addition, about a manufacturing process, since a typical example is shown in detail in Embodiment 4, only an outline is only demonstrated in this Embodiment.

  The solar cell manufacturing method according to the present embodiment includes an optical member 40 that transmits condensed sunlight Ls, a solar cell element 23 that photoelectrically converts sunlight Ls that has passed through the optical member 40, and a solar cell element 23. Is mounted on the receiver substrate 22, the first adhesive portion 31 is formed in a frame shape that is bonded to the receiver substrate 22 and surrounds the solar cell element 23, and the receiver substrate 22 is in contact with and surrounds the solar cell element 23. The pedestal portion 45 bonded to the first bonding portion 31, the second bonding portion 32 formed on the top portion 45 b of the pedestal portion 45, and the resin sealing portion 34 that is surrounded by the first bonding portion 31 and covers the solar cell element 23. And a beam-like flange portion 30c that is bonded to the second bonding portion 32 and extends in a direction parallel to the receiver substrate 22, and that extends outward from the beam-like flange portion 30c and outside the pedestal portion 45. Linked to The solar cell 21 includes a pedestal covering portion 30b having a coupling flange portion 30d and a fixing portion 30 (fitting fixing portion 30r) for fixing a columnar optical member 40p that is a columnar shape as the optical member 40. A battery manufacturing method.

  In the solar cell manufacturing method according to the present embodiment, the first adhesive application step of applying the first adhesive 31r forming the first adhesive portion 31 to the receiver substrate 22, and the base portion 45 on the first adhesive 31r. A pedestal mounting step for bonding and mounting on the receiver substrate 22, a second adhesive applying step for applying a second adhesive 32r forming the second bonding portion 32 to the top 45b of the pedestal 45, and a pedestal coating A base covering portion placement step of attaching the portion 30b to the second adhesive 32r and placing the portion 30b on the receiver substrate 22, and heating the first adhesive 31r and the second adhesive 32r to the first adhesive portion 31 and the second adhesive 32r. A first thermosetting step for forming the bonding portion 32 and a fitting fixing portion arranging step for arranging the fitting fixing portion 30r as the fixing portion 30 on the inner end frame 30ct of the beam-like flange portion 30c (disposing the fixing portion 30). It is also a fixing part arrangement process). A columnar optical member arranging step (an optical member arranging step for arranging the optical member 40) in which a columnar optical member 40p having a columnar shape as the academic member 40 is fixed to the fitting fixing portion 30r, and the solar cell element 23 is sealed with resin. A sealing resin injection step of injecting the sealing resin 34 r to be stopped into the inner region of the first adhesive portion 31.

  Therefore, the first adhesive application step, the pedestal portion placement step, the second adhesive application step, the pedestal covering portion placement step, the fitting fixing portion placement step (fixing portion placement step), the columnar optical member placement step (optical member) Arrangement step) and the sealing resin injection step, each component member (first adhesive portion 31, pedestal portion 45, second adhesive portion 32, pedestal covering portion 30b, fitting fixing portion 30r, resin sealing portion 34). In addition, it is possible to manufacture the solar cell 21 with high heat resistance, weather resistance, and high reliability easily and with high accuracy by a simple process of stacking and aligning the columnar optical members 40p (optical members 40) in order. .

  Further, the sealing resin injection step can be performed from before the first adhesive application step to the columnar optical member placement step. Preferably, it implements after forming the 1st adhesion part 31 in the 1st thermosetting process until the columnar optical member arrangement process. In addition, after the sealing resin injection process, a defoaming process process for performing a defoaming process on the sealing resin 34r and a second thermosetting process for heating and thermosetting the sealing resin 34r can be performed. .

  It is also possible to individually cure the first adhesive 31r and the second adhesive 32r. That is, it is possible to form only the first adhesive portion 31 in the first thermosetting step.

  In addition, the solar cell manufacturing method according to the present embodiment includes an optical member 40 that transmits the concentrated sunlight Ls, a solar cell element 23 that photoelectrically converts the sunlight Ls that has passed through the optical member 40, and a solar cell. A receiver substrate 22 on which the element 23 is placed, a first adhesive portion 31 that is bonded to the receiver substrate 22 and is formed in a frame shape surrounding the solar cell element 23, and abuts on the receiver substrate 22 to surround the solar cell element 23. The solar cell manufacturing that manufactures the solar cell 21 including the pedestal portion 45 bonded to the first bonding portion 31 and the fixing portion 30 (fitting fixing portion 30r) that fixes the optical member 40 with reference to the pedestal portion 45. It is also a method.

  That is, in the solar cell manufacturing method according to the present embodiment, the first adhesive application step of applying the first adhesive 31r forming the first adhesive portion 31 to the receiver substrate 22, and the pedestal portion on the first adhesive 31r. 45 is attached to the receiver substrate 22, and a first thermosetting step for heating the first adhesive 31r to form the first adhesive portion 31, and a fixing portion 30 (fitting and fixing). An optical member disposing step of disposing the optical member 40 (columnar optical member 40p) in the portion 30r).

  Therefore, a 1st adhesive agent application process, a base part mounting process, a 1st thermosetting process, and an optical member arrangement | positioning process are performed, and each structural member (The 1st adhesion part 31, the base part 45, the optical member 40 (columnar optical member) 40p)) are sequentially stacked and aligned, and the solar cell 21 having high heat resistance, weather resistance, and high reliability can be easily and accurately manufactured with high productivity.

<Embodiment 4>
A solar cell and a concentrating solar power generation module according to the present embodiment will be described with reference to FIGS. First, the overall image will be described with reference to FIGS. 4 to 6, and each component will be sequentially described with reference to FIGS. 7 to 13. Since the basic configuration of the solar cell according to the present embodiment is the same as that of the solar cell 21 of the first to third embodiments, the description will be appropriately omitted with the use of reference numerals, and mainly different matters will be described. explain.

  FIG. 4 is a cross-sectional view schematically showing a cross-sectional state of a schematic configuration of the solar cell and the concentrating solar power generation module according to Embodiment 4 of the present invention.

  FIG. 5 is an enlarged cross-sectional view showing a cross-sectional state of a schematic configuration in which the solar cell shown in FIG. 4 is enlarged.

  FIG. 6 is a perspective view showing a schematic configuration of the solar cell shown in FIG.

  The solar cell 21 according to the present embodiment photoelectrically converts the optical member 40 (columnar optical member 40p) that transmits the sunlight Ls collected by the condenser lens 50 and the sunlight Ls that has passed through the optical member 40. A solar cell element 23 and a receiver substrate 22 on which the solar cell element 23 is placed are provided.

  The solar cell 21 is bonded to the receiver substrate 22 and has a first adhesive portion 31 formed in a frame shape surrounding the solar cell element 23, and the first adhesive portion is in contact with the receiver substrate 22 and surrounds the solar cell element 23. A pedestal 45 bonded to 31, and a resin sealing portion 34 that is surrounded by the first bonding portion 31 and covers the solar cell element 23.

  Accordingly, the first adhesive portion 31 and the pedestal portion 45 are overlapped and connected to the receiver substrate 22 and the solar cell element 23 in the overlapping direction, so that the resin sealing portion 34 and the optical member 40 (columnar optics) for the solar cell element 23 are connected. The solar cell element 23 is effectively irradiated with the condensed sunlight Ls determined and easily and accurately in the planar direction and the superimposing direction (height direction) corresponding to the optical axis Lax. Moreover, since it is possible to block the solar cell element 23 from the outside and prevent an influence on the solar cell element due to the entry of foreign matter from the outside, the power generation efficiency and the generated power are improved, and the heat resistance and weather resistance are improved. Thus, the solar cell 21 with improved productivity and improved reliability can be obtained.

  The pedestal portion 45 is bonded to the receiver substrate 22 by a first bonding portion 31 disposed between the bottom surface recess 45 d formed on the bottom surface 45 c of the pedestal portion 45 and the receiver substrate 22. That is, the first adhesive portion 31 is formed between the bottom surface recess 45 d of the pedestal portion 45 and the receiver substrate 22. Therefore, the base 45 and the receiver substrate 22 can be bonded and fixed with high accuracy via the first bonding portion 31.

  Note that the pedestal portion 45 is preferably frame-like, similar to the first adhesive portion 31, but is not limited thereto, and may be a quadruped structure, for example. That is, it is sufficient if the structure is sufficiently bonded to the first bonding portion 31 and is stably fixed to the receiver substrate 22.

  Further, the solar cell 21 according to the present embodiment includes a second adhesive portion 32 formed on the top portion 45b of the pedestal portion 45, and is bonded to the second adhesive portion 32 and extended in a direction parallel to the receiver substrate 22. The base cover portion 30b has a beam-like flange portion 30c and a coupling flange portion 30d that extends outward from the beam-like flange portion 30c and is connected to the receiver substrate 22 outside the base portion 45.

  Therefore, the second adhesive portion 32 and the pedestal covering portion 30b are easily and accurately positioned in the planar direction and the overlapping direction with respect to the receiver substrate 22, the solar cell element 23, the first adhesive portion 31, and the pedestal portion 45, and the second Since the base portion 45 can be fixed by the adhesive portion 32 and the base cover portion 30b (the beam-like flange portion 30c and the coupling flange portion 30d), and the base portion 45 can be protected from the surroundings by the base cover portion 30b. A highly reliable solar cell 21 in which the physical strength of the pedestal 45 is improved can be obtained.

  The optical member 40 is a columnar optical member 40p having a top surface 40a having a columnar shape larger than the bottom surface 40b. The columnar optical member 40p is fixed to the fixing portion 30 (vertical fixing portion 30f) at the inner end of the beam-shaped flange portion 30c. ).

  Therefore, the optical member 40 (columnar optical member 40p) can be easily and highly accurately positioned in the planar direction and the overlapping direction with respect to the pedestal 45 and the beam-shaped flange portion 30c. Positioning with respect to the battery element 23 can be performed easily and with high accuracy.

  In addition, since the optical member 40 (columnar optical member 40p) is disposed in the inner region of the outer peripheral frame 45f of the pedestal portion 45 in the horizontal direction, the optical member 40 can be accurately positioned with respect to the pedestal portion 45. Specifically, the optical member 40 (columnar optical member 40p) is positioned with respect to the vertical fixing portion 30f (fixing portion 30), and the vertical fixing portion 30f is a beam-shaped flange portion 30c (pedestal covering portion 30b). The beam-shaped flange portion 30c is positioned with respect to the pedestal portion 45 (receiver substrate 22).

  Therefore, the fixing part 30 (vertical fixing part 30f) fixes the optical member 40 with the pedestal part 45 as a reference. That is, the solar cell 21 includes a fixing portion 30 (vertical fixing portion 30f) that fixes the optical member 40 with the pedestal portion 45 as a reference.

  In the solar cell 21 according to the present embodiment, the fixed portion 30 has a vertical inclined surface 30s that penetrates and opposes the columnar optical member 40p and is erected on the inner end frame 30ct of the beam-shaped flange portion 30c. It is the fixed part 30f. Therefore, the columnar optical member 40p can be easily positioned and fixed to the beam-like flange portion 30c (vertical fixing portion 30f) in a plane direction and a superimposing direction.

  The solar cell 21 includes a translucent protective plate 41 that covers the top surface 40a of the columnar optical member 40p and is fixed to the vertical fixing portion 30f. Therefore, the translucent protective plate 41 can be easily and accurately positioned and fixed to the columnar optical member 40p in the planar direction and the superimposing direction, so that the sunlight Ls is efficiently guided to the columnar optical member 40p. The gap between the columnar optical member 40p and the vertical fixing portion 30f can be blocked from the outside, and the solar cell element 23 and the columnar optical member 40p are reliably protected from the external environment, and the reliability is improved. The battery 21 can be used.

  The translucent protective plate 41 is bonded to a third bonding portion 33 formed on the top portion 30h of the vertical fixing portion 30f. Therefore, the translucent protective plate 41 is easily and accurately positioned with respect to the vertical fixing portion 30f in the planar direction and the overlapping direction, and the translucent protective plate 41 and the vertical fixing portion 30f are fixed without any gap. Therefore, the columnar optical member 40p can be shielded from the external environment to prevent the influence of foreign matters.

  In addition, the solar cell 21 includes a cap portion 60 that has a window frame 60b that covers the outer peripheral end of the translucent protective plate 41 and is connected to the vertical fixing portion 30f. Therefore, since the cap part 60 can be easily and highly accurately positioned and fixed in the plane direction and the superimposing direction with respect to the translucent protective plate 41, the translucent protective plate 41 is fixed and the vertical fixing part is fixed. By protecting the outer peripheral end of the top portion 30h of 30f, the mechanical strength of the translucent protective plate 41 is ensured, and the solar cell 21 with improved reliability can be obtained.

  The cap portion 60 (see FIG. 6) is coupled by fitting a claw portion 60d extending from the frame portion 60c into a locking recess 30k formed in the vertical fixing portion 30f and locking it. Moreover, the window frame 60b (cap part 60) is made into the shape which shields the 3rd adhesion part 33 from sunlight Ls. Since the 3rd adhesion part 33 can be prevented from being irradiated to sunlight Ls, degradation of the 3rd adhesion part 33 (3rd adhesive 33r) can be prevented.

  Therefore, since the solar cell element 23 and the columnar optical member 40p can be blocked from the outside, it is possible to prevent foreign matters (rain water, sand dust, etc.) from entering the solar cell element 23 and the columnar optical member 40p. Further, the columnar optical member 40p can improve the light condensing characteristics over a wide wavelength region to improve the power generation efficiency and the generated power, so that the inexpensive solar cell 21 with high heat resistance, reliability, and weather resistance can be obtained.

  That is, since the sunlight Ls irradiated to the solar cell element 23 is guided by the columnar optical member 40p, it is possible to improve the condensing characteristic with respect to a wide wavelength region. Moreover, since the outer periphery of the solar cell element 23 and the columnar optical member 40p is covered with the vertical fixing portion 30f, the pedestal portion 45, and the translucent protective plate 41, the solar cell element 23 and the columnar optical member 40p are unnecessary from the outside. It is possible to eliminate the influence, and it is possible to improve the light collecting characteristics and reliability.

  The translucent protective plate 41 is bonded to the top surface 40a of the columnar optical member 40p via the translucent adhesive layer 36. Therefore, the gap (space region) between the translucent protective plate 41 and the columnar optical member 40p is eliminated, and the fluctuation of the refractive index between the translucent protective plate 41 and the columnar optical member 40p is suppressed, The sunlight Ls can be efficiently guided to the solar cell element 23.

  For the refractive index n = 1.5 when the columnar optical member 40p is made of glass, for example, and for the refractive index n = 1.5 when the transparent protective plate 41 is made of glass, for example, the light-transmitting adhesive layer When 36 is made of silicone resin, the refractive index n = 1.3.

  Therefore, a large difference in refractive index does not occur between the columnar optical member 40p and the translucent adhesive layer 36, and between the translucent adhesive layer 36 and the translucent protective plate 41. Since there is no great difference in refractive index between the translucent protective plate 41 and the columnar optical member 40p, the sunlight Ls incident on the translucent protective plate 41 is efficiently columnar optical member 40p (top surface 40a). ). That is, it is possible to efficiently irradiate the solar cell element 23 (effective light receiving region) with the sunlight Ls incident on the translucent protective plate 41.

  The vertical fixing portion 30f is bonded to the pedestal portion 45 by a second bonding portion 32 disposed between the top portion 45b of the pedestal portion 45 and the beam-like flange portion 30c on which the vertical fixing portion 30f is erected. . That is, the second adhesive portion 32 is formed between the top portion 45b of the pedestal portion 45 and the vertical fixing portion 30f.

  Accordingly, the vertical fixing portion 30f and the pedestal portion 45 can be bonded and fixed without any gaps via the second adhesive portion 32, and therefore, between the vertical fixing portion 30f and the pedestal portion 45, It is possible to prevent foreign matters from entering the solar cell element 23 and the columnar optical member 40p.

  The vertical fixing portion 30f holds the side surface (optical path inclined surface 40c) adjacent to the top surface 40a of the columnar optical member 40p in contact with the through inclined surface 30s. Further, the vertical fixing portion 30f is integrated with the base covering portion 30b (the beam-like flange portion 30c and the coupling flange portion 30d). The second adhesive portion 32 is disposed between the pedestal covering portion 30 b (the beam-like flange portion 30 c) and the pedestal portion 45.

  Therefore, the heat from the vertical fixing portion 30f and the pedestal portion 45 is efficiently radiated to the receiver substrate 22 through the pedestal covering portion 30b (coupling flange portion 30d), and the receiver substrate is also radiated through the pedestal covering portion 30b. Since it becomes possible to position and fix the vertical fixing portion 30f to 22, it is possible to improve heat dissipation and physical strength.

  The pedestal covering portion 30b includes a beam-like flange portion 30c that extends from the vertical fixing portion 30f and is arranged in a beam shape, and a coupling member that is arranged by being bent from the beam-like flange portion 30c so as to contact the receiver substrate 22 A flange body 30d.

  Therefore, it is possible to improve the design freedom of the vertical fixing portion 30f, to make the vertical fixing portion 30f an optimal shape, and to securely connect the vertical fixing portion 30f (fixing portion 30) to the receiver substrate 22. .

  The bottom surface 40b of the columnar optical member 40p has an area corresponding to the solar cell element 23, for example, an area corresponding to the effective light receiving area of the solar cell element 23. That is, by making the bottom surface 40b equal to the effective light receiving area of the solar cell element 23, it is possible to prevent unnecessary irradiation of the sunlight Ls, thereby preventing temperature rise due to solar energy and improving power generation efficiency. be able to.

  Moreover, since the top surface 40a of the columnar optical member 40p has a larger area than the bottom surface 40b, the condensed sunlight Ls can be reliably incident on the columnar optical member 40p.

  The translucent protective plate 41 is bonded to the vertical fixing portion 30f by a third adhesive portion 33 disposed between the top 30h of the vertical fixing portion 30f and the translucent protective plate 41. That is, the third adhesive portion 33 is formed between the vertical fixing portion 30 f and the translucent protective plate 41.

  Accordingly, the translucent protective plate 41 and the vertical fixing portion 30f can be fixed without gaps via the third adhesive portion 33, so that the columnar optical member 40p is shielded from the external environment and foreign matter is columnar optical member. It is possible to prevent the influence on 40p.

  The resin sealing portion 34 covering the solar cell element 23 is formed by covering the receiver substrate 22 between the optical member 40 (columnar optical member 40p) and the receiver substrate 22. The resin sealing portion 34 is surrounded by the first bonding portion 31 at the end.

  Therefore, the members (for example, the solar cell element 23, the bypass diode 24, the wire 29 (see FIG. 7), and the wiring member) arranged on the surface of the receiver substrate 22 inside the pedestal portion 45 (the first bonding portion 31) are securely secured. Therefore, it is possible to improve the insulation and weather resistance and improve the reliability.

  Moreover, the resin sealing part 34 is made to contact the bottom face 40b of the columnar optical member 40p. That is, the bottom surface 40b (columnar optical member 40p) is in a state of being immersed in the resin sealing portion 34. Therefore, the gas between the columnar optical member 40p and the resin sealing portion 34 is excluded to suppress the change in the refractive index between the columnar optical member 40p and the resin sealing portion 34, and the sunlight Ls can be efficiently generated. The light can be guided to the solar cell element 23.

  In other words, the combination of the columnar optical member 40p and the resin sealing portion 34 makes it incident on the top surface 40a, travels through the columnar optical member 40p, and efficiently emits sunlight Ls emitted toward the solar cell element 23 from the bottom surface 40b. It becomes possible to irradiate the solar cell element 23, and the power generation efficiency can be improved.

  The columnar optical member 40p is made of, for example, heat-resistant glass, and the bottom surface 40b is immersed in the resin sealing portion 34 included in the pedestal portion 45, for example, 0.3 mm to 0.5 mm. In a specific example, the refractive index n of the columnar optical member 40p (for example, glass) is 1.5, and the refractive index n is 1.3 when the resin sealing portion 34 is formed of, for example, a silicone resin.

  Accordingly, since the difference between the refractive index n = 1 and the refractive index of air is larger than the refractive index n = 1.5 of the columnar optical member 40p, the sunlight Ls incident in the columnar optical member 40p is inclined in the optical path. It is possible to efficiently advance sunlight Ls to the tip (bottom surface 40b) of the columnar optical member 40p while efficiently totally reflecting the surface 40c.

  In addition, since there is no significant difference in refractive index between the columnar optical member 40p and the resin sealing portion 34, the sunlight Ls that has traveled to the bottom surface 40b while totally reflecting the columnar optical member 40p, The solar cell element 23 (effective light receiving region) can be efficiently irradiated through the resin sealing portion 34.

  That is, the combination of the resin sealing portion 34 and the columnar optical member 40p makes it easy to adjust and unify the refractive index in the secondary optical system (the light guide including the columnar optical member 40p), and the light is collected by the condenser lens 50. The solar light Ls can be efficiently incident on the solar cell element 23, and the power generation efficiency of the solar cell 21 can be increased.

  The coupling flange body 30d (pedestal covering portion 30b, vertical fixing portion 30f) includes a pedestal covering portion attachment hole 30j formed in alignment with the attachment hole 22h formed in the receiver substrate 22. Further, two mounting holes 22h and two pedestal covering portion mounting holes 30j are formed, and the receiver substrate 22 and the vertical fixing portion 30f can be positioned in a self-aligning manner.

  That is, the vertical fixing portion 30f is positioned with high accuracy and high workability with respect to the receiver substrate 22, and the mutual positional relationship can be fixed by the fixing member 54h (for example, rivets).

  Accordingly, the vertical fixing portion 30f can be easily and highly accurately positioned and firmly held with respect to the receiver substrate 22, so that the columnar optical member 40p can be easily and highly accurately attached to the solar cell element 23. An inexpensive solar cell 21 having high heat resistance, reliability, and weather resistance by improving the light collection efficiency and power generation by improving the light collection characteristics over a wide wavelength region. It can be.

  In the present embodiment, in addition to the solar cell 21, a concentrating solar power generation module 20 on which the solar cell 21 is mounted will be described together (see FIG. 4). As described above, the solar cell 21 according to the first to third embodiments can also be the concentrating solar power generation module 20 in the same manner as the present embodiment.

  The concentrating solar power generation module 20 according to the present embodiment includes a condensing lens 50 that condenses sunlight Ls, and a solar cell 21 that receives the collected sunlight Ls and performs photoelectric conversion. Therefore, it is possible to reliably improve the light condensing characteristics over a wide wavelength region to improve the power generation efficiency and the generated power, and to provide an inexpensive concentrating solar power generation module 20 with high heat resistance, reliability, and weather resistance.

  The concentrating solar power generation module 20 includes a lens frame 51 that holds the condensing lens 50 and positions the solar cell 21 and the condensing lens 50 relative to each other. The condenser lens 50 is fixed to the top surface of the side of the lens frame 51 with a fixing member 55t (for example, a screw).

  The solar cell 21 (receiver substrate 22) is fastened to the heat radiation fin 53 by a fixing member 54h that passes through the attachment hole 22h and the base cover attachment hole 30j, and the heat radiation fin 53 is a fixing member 54p (for example, a screw). The base plate 52 is fastened. The base plate 52 is fixed to the frame bottom 51b of the lens frame 51 by a fixing member 55b (for example, a screw).

  That is, the solar cell 21 is fixed to the lens frame 51 (frame bottom 51b) via the heat radiation fins 53 and the base plate 52. Therefore, the condensing lens 50 and the solar cell 21 are positioned easily and with high accuracy on the optical axis Lax, and the condensed sunlight Ls passes through the transmission window 51w opened in the frame bottom 51b of the lens frame 51. And enters the solar cell 21 with high accuracy.

  The receiver substrate 22 is connected and integrated with the heat radiation fins 53 by a fixing member 54h inserted into the attachment hole 22h. The heat radiation fins 53 are comb-shaped. Therefore, the radiation fins 53 connected to the back surface of the receiver substrate 22 can efficiently dissipate the heat generated in the receiver substrate 22 due to the concentrated sunlight Ls to the outside. It is possible to further improve the power generation efficiency and reliability. The radiating fins 53 are made of aluminum in order to reduce the weight.

  The condensing lens 50 can have various shapes such as a biconvex lens, a plano-convex lens, and a Fresnel lens. Moreover, as a material of the condensing lens 50, the thing with the high transmittance | permeability with the sensitivity wavelength light of the solar cell element 23 and a weather resistance are good. For example, it is possible to apply white plate glass, weather resistant grade acrylic, polycarbonate, and the like that are generally used for ordinary photovoltaic modules and the like.

  In addition, the material of the condensing lens 50 is not limited to these materials, The material of these materials may have a multilayer structure. In addition, an appropriate ultraviolet absorber can be added to these materials for the purpose of preventing ultraviolet degradation of the condenser lens 50 and other members.

  FIG. 7 is a perspective view showing an arrangement state of the solar cell element and the receiver substrate of the solar cell shown in FIG.

  The solar cell element 23 is arranged at the center of the receiver substrate 22 in consideration of the uniformity of heat dissipation. A bypass diode 24 is connected in parallel to the solar cell element 23. The bypass diode 24 ensures a current path when the solar cell element 23 operates as a resistor when the sunlight Ls is interrupted.

  For example, when the concentrating solar power generation module 20 is configured by connecting a plurality of solar cell elements 23, the bypass diode 24 can maintain the power generation function as a whole even when the specific solar cell element 23 does not perform the power generation function. It is to be configured.

  The solar cell element 23 is formed with a PN junction, an electrode, and the like by a known semiconductor manufacturing process using, for example, Si or a GaAs compound semiconductor. From the viewpoint of reducing the material cost by reducing the solar cell material to be used, it is processed into a wafer state and formed as a solar cell element 23 and then separated into chips of about 4 to 6 mm square. . The solar cell element 23 includes a substrate electrode (not shown) on the substrate side of the chip and a surface electrode (not shown) on the surface side of the chip as electrodes.

  The receiver substrate 22 includes, for example, a base base 22a, an intermediate insulating layer stacked on the base base 22a, and a first connection pattern 25 and a second connection pattern 26 made of copper stacked on the intermediate insulating layer. The receiver substrate 22 includes a surface protective layer 27 that protects the first connection pattern 25 and the second connection pattern 26.

  The surface protective layer 27 covering the first connection pattern 25 is removed in the region of the first extraction electrode 25a to which an external terminal (not shown) is connected, the region in which the solar cell element 23 and the bypass diode 24 are mounted. The copper (conductor) of the first connection pattern 25 is directly exposed to the outside.

  Similarly, the surface protective layer 27 covering the second connection pattern 26 is formed on the region of the second extraction electrode 26 a to which an external terminal (not shown) is connected, the surface electrode of the solar cell element 23, and the surface electrode of the bypass diode 24. It is removed in the region of the wire connection part 26b connected via the wire 29, and the copper (conductor) of the second connection pattern 26 is directly exposed to the outside.

  The receiver substrate 22 is, for example, 24 mm to 60 mm square with respect to the solar cell element 23 of about 4 mm to 6 mm. The thickness of the receiver substrate 22 is, for example, about 0.6 mm to 3 mm in consideration of heat dissipation. Further, the base base 22a is made of, for example, aluminum or ceramic to improve heat dissipation and to reduce the weight.

  The mounting holes 22h formed in a pair on the diagonal line of the receiver substrate 22 are for positioning when the receiver substrate 22 is set in each manufacturing apparatus (not shown) in a later processing step in addition to the above-described fixing function. Also works.

  FIG. 8 is a perspective view showing a schematic configuration of the base portion of the solar cell shown in FIG.

  9 is a cross-sectional view showing a cross-sectional state of the pedestal portion shown in FIG.

  The pedestal portion 45 has a bottom surface recess 45 d formed on the bottom surface 45 c that contacts the receiver substrate 22. The bottom recess 45d is formed by chamfering, for example, an inner corner of the frame-like bottom surface of the pedestal 45.

  As described above, the pedestal portion 45 is bonded to the receiver substrate 22 by the first bonding portion 31 filled in the bottom surface recess 45d. Therefore, it becomes possible to fix (adhere) the pedestal portion 45 to the receiver substrate 22 with ease and high accuracy and good workability.

  Further, the pedestal portion 45 is formed in a frame shape so as to constitute a through opening 45a including the columnar optical member 40p, and has a frame-shaped top portion 45b facing the beam-shaped flange portion 30c. The top 45b is formed by providing a step in the outer corner of the top surface of the pedestal 45, and can be formed by positioning the second adhesive portion 32 with high accuracy. As described above, the pedestal portion 45 is bonded to the beam-shaped flange portion 30c by the second bonding portion 32 filled (formed) in the top portion 45b.

  Therefore, both the receiver substrate 22 and the pedestal portion 45, and the pedestal portion 45 and the beam-like flange portion 30c have excellent sealing properties with no gap. Further, since the beam-like flange portion 30c is bonded to the pedestal portion 45 by the second bonding portion 32, it is reliably and firmly fixed.

  The pedestal portion 45 has a frame shape that encloses the solar cell element 23, the bypass diode 24, and the wire connection portion 26b, has a frame shape with one side of 18 mm to 20 mm, and has a thickness (height) of about 8 mm. is there. In addition, although the base part 45 is shown as a frame shape, as described above, for example, it can be brought into contact with the receiver substrate 22 at a four-leg portion as a four-leg structure.

  Since the pedestal portion 45 may be in contact with the first connection pattern 25 and the second connection pattern 26 that are arranged on the surface of the receiver substrate 22 and function as external electrodes, the first connection pattern 25 is passed through the pedestal portion 45. It is necessary to prevent current from flowing between the second connection pattern 26 and the second connection pattern 26. Therefore, the pedestal portion 45 is made of an insulating resin such as polycarbonate.

  FIG. 10 is a perspective view showing a schematic configuration of the base covering portion, the fixing portion, and the columnar optical member of the solar cell shown in FIG.

  FIG. 11 is a cross-sectional view illustrating a cross-sectional state of the pedestal covering portion, the fixing portion, and the columnar optical member illustrated in FIG. 10.

  The pedestal covering portion 30b includes a beam-like flange portion 30c and a coupling flange portion 30d, and a vertical fixing portion 30f as a fixing portion 30 is formed at the tip (inner tip frame 30ct) of the beam-like flange portion 30c. ing.

  That is, since the vertical fixing portion 30f is connected to the base covering portion 30b (the beam-like flange portion 30c and the coupling flange portion 30d), it is fixed to the receiver substrate 22 in a mechanically stable state. Therefore, it is possible to stably hold the columnar optical member 40p by eliminating the influence of the position of the center of gravity of the columnar optical member 40p.

  The pedestal covering portion 30b and the vertical fixing portion 30f are integrated and formed of, for example, an aluminum alloy. That is, the base covering portion 30b and the vertical fixing portion 30f are made of metal. Accordingly, the mechanical strength and heat dissipation of the base covering portion 30b and the vertical fixing portion 30f can be improved, so that the columnar optical member 40p can be securely held with good stability, and heat can be stored in the columnar optical member 40p. It is possible to improve power generation efficiency and reliability.

  One side of the frame-shaped outer shape of the vertical fixing portion 30f is, for example, 17 mm, the height is, for example, 10 mm, and the height from the coupling flange body 30d to the top surface of the vertical fixing portion 30f is, for example, 20 mm.

  The columnar optical member 40p is a quadrangular column having an inclined side surface, and the top surface 40a and the bottom surface 40b are quadrilaterals whose centers coincide with each other. Therefore, the columnar optical member 40p has four optical path inclined surfaces 40c defined by a bottom surface 40b and a top surface 40a formed larger than the bottom surface 40b. Since the columnar optical member 40p has the optical path inclined surface 40c, it becomes a light guide path that efficiently guides and irradiates the concentrated sunlight Ls to the solar cell element 23.

  The vertical fixing portion 30f includes a through hole 30e having a through inclined surface 30s that penetrates the columnar optical member 40p (a quadrangular column having different areas of both end faces) and abuts (contacts) the optical path inclined surface 40c. That is, the optical path inclined surface 40c and the through inclined surface 30s have the same inclination angle. Therefore, the columnar optical member 40p is fitted in a self-aligned manner with respect to the beam-like flange portion 30c (through hole 30e, vertical fixing portion 30f) by taper fitting, and is positioned with high accuracy. be able to.

  Further, the vertical fixing portion 30f (through inclined surface 30s) and the columnar optical member 40p (optical path inclined surface 40c) are closely connected to each other and firmly connected to each other, and the condensed sunlight Ls is supplied to the solar cell element 23. It is possible to irradiate with high accuracy to improve the light collecting property and improve the power generation efficiency.

  The through hole 30e (through inclined surface 30s) is brought into contact with the upper position (on the top surface 40a side) of the columnar optical member 40p (optical path inclined surface 40c). Therefore, the columnar optical member 40p can be stably fixed regardless of the position of the center of gravity.

  The top portion 30h of the vertical fixing portion 30f has a groove-like recess for forming the third adhesive portion 33 with high accuracy, and a positioning step 30m for facilitating the positioning of the translucent protective plate 41 is provided in the frame. It is formed in a shape. Therefore, the 3rd adhesion part 33 (refer to Drawing 5) can be formed easily and with high precision, and translucent protection board 41 can be arranged easily and with high precision.

  The through-hole 30e has through-grooves 30g formed corresponding to the corners (four corners formed by the optical path inclined surfaces 40c intersecting each other) of a square column (columnar optical member 40p). Therefore, the through-groove 30g prevents damage to the corners of the columnar optical member 40p, and can form an air passage from the solar cell element 23 to the top surface 40a. Bubbles generated by the defoaming process for the sealing resin 34r (see FIG. 21) filled at the time of formation can be effectively discharged to the outside.

  Moreover, since the through-groove 30g can generate convection from the solar cell element 23 to the top surface 40a during operation, heat dissipation can be improved. In addition, a wide groove is formed on the through inclined surface 30s similarly to the through groove portion 30g so that total reflection at the optical path inclined surface 40c is effectively generated.

  In the columnar optical member 40p, since the top surface 40a on which the sunlight Ls is incident is made larger than the bottom surface 40b, a margin for the positional deviation between the condenser lens 50 and the solar cell 21 (top surface 40a). The power generation efficiency and power generation can be improved.

  That is, a light collecting path (columnar optical member 40p) having high positional accuracy and stability is obtained, and a light collecting characteristic capable of collecting sunlight Ls with high accuracy in a wide wavelength region is obtained. It is possible to improve the generated power by reducing the power generation efficiency and the temperature rise caused by the positional deviation of the concentrated sunlight Ls, and improve the heat resistance, reliability, and weather resistance.

  FIG. 12 is a perspective view illustrating a schematic configuration of the cap portion illustrated in FIG. 4.

  13 is a cross-sectional view showing a cross-sectional shape of the cap portion shown in FIG.

  The cap part 60 (window frame 60b) is configured to shield the third adhesive part 33 from sunlight Ls. Therefore, since it is possible to prevent the third adhesive portion 33 from being irradiated with the sunlight Ls, it is possible to prevent the third adhesive portion 33 (the third adhesive 33r) from being deteriorated.

  The cap unit 60 includes a flat surface portion 60a that is bonded to the third bonding portion 33 and shields sunlight Ls from the third bonding portion 33, and also has sunlight for the top portion 30h of the vertical fixing portion 30f (FIG. 11). A frame portion 60c that shields Ls is provided adjacent to the plane portion 60a. The flat portion 60a has a window frame 60b at the center that is opened so that sunlight Ls is incident on the inner side of the outer periphery of the top surface 40a. The frame part 60c is erected with respect to the end of the flat part 60a and has a shape surrounding the top part 30h of the vertical fixing part 30f.

  That is, the cap part 60 (the plane part 60 a and the frame part 60 c) has an L-shaped cross section and does not directly irradiate the third bonding part 33 with sunlight Ls. In addition, the cap part 60 is made into the shape of a frame whose one side is 20 mm, for example, and the thickness of the plane part 60a and the frame part 60c is about 1.5 mm.

  The cap part 60 is formed of a metal (for example, an aluminum alloy). Therefore, since the cap part 60 becomes high in mechanical strength and heat dissipation, the surface of the translucent protective plate 41 and the vertical fixing part 30f is prevented from being deteriorated or burnt by sunlight Ls, Since the translucent protective plate 41 and the vertical fixing portion 30f can be physically protected, the solar cell 21 having excellent power generation efficiency and reliability can be provided.

  Further, claw portions 60d formed by extending the frame portion 60c are provided at two opposing positions, and are configured to be locked to locking recesses 30k (FIG. 6) provided in the vertical fixing portion 30f. . By hooking the claw portion 60d to the locking recess 30k, the cap portion 60 can be locked and fixed to the outside of the top portion 30h of the vertical fixing portion 30f.

<Embodiment 5>
Based on FIG. 14 thru | or FIG. 26 and FIG. 7, the solar cell manufacturing method which manufactures the solar cell which concerns on this Embodiment is demonstrated.

  Since the solar cell 21 according to the present embodiment is the same as the solar cell 21 described in the first to fourth embodiments (particularly, the solar cell 21 according to the fourth embodiment), the reference numerals are appropriately used, The different items will be explained.

  That is, in the solar cell manufacturing method according to the present embodiment, the optical member 40 that transmits the concentrated sunlight Ls, the solar cell element 23 that photoelectrically converts the sunlight Ls that has passed through the optical member 40, and the solar cell. A receiver substrate 22 on which the element 23 is placed, a first adhesive portion 31 that is bonded to the receiver substrate 22 and is formed in a frame shape surrounding the solar cell element 23, and abuts on the receiver substrate 22 to surround the solar cell element 23. The base part 45 bonded to the first adhesive part 31, the resin sealing part 34 surrounded by the first adhesive part 31 and covering the solar cell element 23, and the second adhesive formed on the top part 45 b of the base part 45. A beam-like flange portion 30c that is bonded to the second bonding portion 32 and extends in a direction parallel to the receiver substrate 22, and a receiver that extends outwardly from the beam-like flange portion 30c and outside the pedestal portion 45. Board 22 A pedestal covering portion 30b and a linked coupling flange 30d, a solar cell manufacturing method for manufacturing the solar cell and a fixing portion 30 for fixing the columnar optical member 40p that is a columnar as the optical member 40.

  The solar cell manufacturing method according to the present embodiment includes a first adhesive application step, a pedestal portion placement step, a second adhesive application step, and a pedestal covering portion placement step (fixed portion) described below. Placement step), first thermosetting step, sealing resin injection step, columnar optical member mounting step (optical member placement step), defoaming step, second thermosetting step, and translucent adhesive resin. An application step, a third adhesive application step, a translucent protective plate placement step, a third thermosetting step, and a cap portion placement step;

  FIG. 14: is a flowchart which shows the manufacturing process of the solar cell manufacturing method which manufactures the solar cell which concerns on Embodiment 5 of this invention.

  The solar cell manufacturing method for manufacturing the solar cell 21 according to the present embodiment includes the following steps S1 to S15. This will be described with reference to the drawings (FIGS. 7, 15 to 26) corresponding to each step.

Step S1 (FIG. 7):
The solar cell element 23 is mounted on the receiver substrate 22 (solar cell element mounting step).

  First, the receiver board 22 is prepared. A first connection pattern 25 and a second connection pattern 26 are formed on the receiver substrate 22, and the surface is protected (insulated) by a surface protective layer 27. A chip substrate (substrate electrode: not shown) of the solar cell element 23 and a chip substrate (substrate electrode: not shown) of the bypass diode 24 are bonded (die-bonded) to the first connection pattern 25. In the region corresponding to the solar cell element 23, the bypass diode 24, the region corresponding to the first extraction electrode 25a, the second extraction electrode 26a, and the wire connection portion 26b to which the external terminal is connected, the surface protective layer 27 is removed in advance. ing.

  The solar cell element 23 is soldered and placed in a region (center portion) to which the solar cell element 23 of the receiver substrate 22 is connected. Similarly, the bypass diode 24 is soldered and placed in a region (a portion slightly shifted from the central portion of the receiver substrate 22) where the bypass diode is placed at a certain distance from the solar cell element 23.

  Next, for example, one of the four wires 29 is connected to the surface electrode (not shown) of the solar cell element 23, and one of the two wires 29 is connected to the surface electrode (not shown) of the bypass diode 24, respectively. Connecting. The other of the wires 29 is connected to the wire connection portion 26b where the second connection pattern 26 is exposed.

  The receiver substrate 22 can be appropriately positioned by the mounting hole 22h.

Step S2 (FIGS. 15 to 17):
After the preparation steps of FIGS. 15 and 16, the first adhesive 31r is applied to the receiver substrate 22 (FIG. 17, first adhesive application step).

  FIG. 15 shows a state in which the receiver substrate is set on the positioning jig as a preparation step for applying the first adhesive that becomes the first adhesive portion in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention. FIG.

  FIG. 16 is a process perspective view showing a state in which the receiver substrate is set on the positioning jig in the preparation process of FIG.

  After mounting the solar cell element 23 and the bypass diode 24 on the receiver substrate 22, the mounting holes 22 h provided in the receiver substrate 22 are attached while being aligned with the positioning pins 71 provided in the positioning jig 70.

  That is, it is possible to position the base cover portion mounting hole 30j of the base cover portion 30b (coupling flange portion 30d) using the mounting hole 22h of the positioning jig 70 with respect to the positioning pin 71 as a reference for positioning. The base covering portion 30b can be easily and highly accurately positioned with respect to the substrate 22 with good workability.

  FIG. 17 is a process perspective view showing a state in which the first adhesive portion is applied in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  The 1st adhesive agent 31r which forms the 1st adhesion part 31 which adhere | attaches the base part 45 and the receiver board | substrate 22 is apply | coated to the receiver board | substrate 22 (1st adhesive agent application process).

  The positioning jig 70 on which the receiver substrate 22 is set is set at a predetermined position on a table (not shown) of the first adhesive dispenser 61, and a position corresponding to a predetermined position (bottom surface recess 45d (see FIG. 9)) of the receiver substrate 22. Appropriate marks may be formed in advance.) The first adhesive 31r is applied so as to have a predetermined shape for forming the first adhesive portion 31.

  That is, a shape (frame shape, cross-sectional width, cross-section) in which a white silicone resin (first adhesive 31r) is determined at a predetermined position on the surface of the receiver substrate 22 on which the solar cell element 23 and the bypass diode 24 are placed. Apply at the height).

Step S3 (FIG. 18):
FIG. 18 is a process perspective view showing a state in which the pedestal is placed on the receiver substrate in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  The pedestal 45 is bonded to the first adhesive 31r and placed on the receiver substrate 22 (pedestal placement step).

  The mounting of the pedestal 45 on the receiver substrate 22 is performed by adjusting the position so that the center of the pedestal 45 is in the center of the receiver substrate 22. The first adhesive 31r is applied in a shape that fills the bottom recess 45d. Therefore, the first adhesive 31r fills the bottom surface recess 45d, and forms the first adhesive portion 31 that firmly bonds (fixes) the pedestal portion 45 to the receiver substrate 22.

  Moreover, the base part 45 is provided with a through opening 45a on the inner side, and the through opening 45a has a shape including the solar cell element 23, the bypass diode 24, and the wire connection part 26b. Therefore, the base portion 45 can protect the solar cell element 23, the bypass diode 24, and the wire connection portion 26b from the surrounding environment.

  The first adhesive 31r (first adhesive portion 31) is made of resin (sealing resin constituting the resin sealing portion 34), gas (first flat plate optical member 40f and resin sealing portion 34 of the first embodiment), or the like. It functions as a blocking material (dam material) for sealing the filler. Therefore, the frame-shaped pedestal portion 45 is not required to have a structure in which the frame-shaped pedestal portion 45 is formed in a frame shape and the bottom surface 45c directly contacts and adheres to the receiver substrate 22 in a frame shape. In other words, the frame-shaped pedestal portion 45 only needs to be bonded so that at least a part of the bottom surface 45c directly contacts the receiver substrate 22 so that the focal length of the optical member 40 can be defined.

  For example, when the pedestal portion 45 is square (FIG. 18), it is provided with leg-like portions that protrude toward the receiver substrate 22 at the corners of the four corners, and are bonded so that the bottom surface of the leg-shaped portion directly contacts the receiver substrate 22. It is possible to adopt a configuration (modification). Preferably, the first adhesive 31r may be formed by crimping the first adhesive 31r to fill the gap formed between the pedestal 45 and the receiver substrate 22 with the first adhesive 31r, and at least the resin It is only necessary to create a sealed space with respect to the surrounding environment using the sealing portion 34 and the pedestal portion 45.

  Thereby, the resin (resin sealing part 34) with high translucency which seals the solar cell element 23, the 1st extraction electrode 25a of the 1st connection pattern 25 pulled out to the periphery, and the 2nd of the 2nd connection pattern 26 2 The sealing resin (not shown) for the take-out electrode 26a can be separated and applied, and expensive and highly transparent resin can be isolated and limited to a narrow space. The solar cell 21 can be manufactured at a low cost without deteriorating the performance.

Step S4 (FIG. 19):
FIG. 19 is a process perspective view illustrating a state in which the second adhesive portion is applied to the pedestal portion in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  The 2nd adhesive agent 32r which forms the 2nd adhesive part 32 which adhere | attaches the base coating | coated part 30b and the base part 45 is apply | coated to the top part 45b of the base part 45 (2nd adhesive agent application process).

  The positioning jig 70 on which the receiver substrate 22 is set is set at a predetermined position on a table (not shown) of the second adhesive dispenser 62, and is second bonded to the top 45b of the pedestal 45 mounted and bonded to the receiver substrate 22. The second adhesive 32r is applied so as to have a predetermined shape for forming the portion 32.

  That is, the second adhesive 32r is applied to the top 45b in a predetermined shape (frame shape, cross-sectional width, cross-sectional height). The first adhesive 31r and the second adhesive 32r may be the same resin, and the first adhesive dispenser 61 and the second adhesive dispenser 62 may be the same device.

Step S5 (FIG. 20):
FIG. 20 is a process perspective view showing a state in which the pedestal covering part is placed on the pedestal part in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  While maintaining the state of being placed on the table of the second adhesive dispenser 62, the pedestal covering portion 30b is placed on the receiver substrate 22 (that is, the second adhesive 32r of the pedestal portion 45) (pedestal covering portion placing step). ).

  That is, the vertical fixing portion 30f as the fixing portion 30 that has the through inclined surface 30s that penetrates the columnar optical member 40p and faces the inner end frame 30ct (see FIG. 11) of the beam-like flange portion 30c is provided. The pedestal covering portion 30b is adhered to the second adhesive 32r and placed on the receiver substrate 22 (the pedestal covering portion placing step. Alternatively, this is also a fixing portion arranging step for arranging the fixing portion 30).

  By fitting the pedestal covering portion mounting hole 30j formed in the coupling flange 30d of the pedestal covering portion 30b into the positioning pins 71 provided in the positioning jig 70 in a self-aligning manner, The pedestal covering portion 30b can be easily and accurately positioned. Further, since the second adhesive 32r is applied to the top 45b in the second adhesive application step (step S4), the base covering part 30b and the base 45 (top 45b) are bonded to each other. It will be in the state fixed firmly.

Step S6:
The first adhesive 31r and the second adhesive 32r are heated and thermally cured to form the first adhesive portion 31 and the second adhesive portion 32 (first thermosetting step).

  That is, with the receiver substrate 22 removed from the table of the second adhesive dispenser 62 and accommodated in an oven (not shown), the first adhesive 31r and the second adhesive 32r are heated by heating at 150 ° C. for 30 minutes, for example. Harden. By the thermosetting of the first adhesive 31r and the second adhesive 32r, the receiver substrate 22 and the pedestal part 45 are integrated (coupled without a gap) by the first adhesive part 31, and the pedestal part 45 and the pedestal covering part 30b are They are integrated by the second adhesive portion 32 and joined together without a gap.

Step S7 (FIG. 21):
FIG. 21 is a process perspective view showing a state in which a sealing resin for resin-sealing a solar cell element is injected into the pedestal portion in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  A sealing resin 34r for resin-sealing the solar cell element 23 is injected into the inner region of the pedestal portion 45 (first adhesive portion 31) (sealing resin injection step).

  The positioning jig 70 on which the receiver substrate 22 is set is set at a predetermined position on a table (not shown) of the sealing resin dispenser 63, and a predetermined amount of the sealing resin 34r passes through the vertical fixing portion 30f (fixing portion 30). Inject through hole 30e.

  As the sealing resin 34r, a silicone resin having high translucency is applied. The injection amount is the sealing resin 34r (resin sealing portion 34) injected by the tip (bottom surface 40b) of the columnar optical member 40 when the columnar optical member 40 is fitted into the through hole 30e of the vertical fixing portion 30f. The height is such that the surface is covered (immersed) by about 0.3 mm to 0.5 mm.

Step S8 (FIG. 22):
FIG. 22 is a process perspective view showing a state in which the columnar optical member is inserted into the through hole of the vertical fixing portion in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  The columnar optical member 40 is inserted into the through hole 30e of the vertical fixing portion 30f (columnar optical member arranging step). That is, the columnar optical member 40p is disposed so as to be in contact with and fixed to the through inclined surface 30s (the optical member 40 is also disposed and is an optical member disposing step). When the columnar optical member 40f is inserted into the vertical fixing portion 30f (through hole 30e), the bottom surface 40b of the columnar optical member 40 is covered with the sealing resin 34r.

  While maintaining the state of being placed on the table of the sealing resin dispenser 63, the columnar optical member 40f is fitted to the vertical fixing portion 30f (pedestal covering portion 30b). As described above, the columnar optical member 40 (optical path inclined surface 40c) is formed so as to be self-aligned with the vertical fixing portion 30f (through hole 30e, through inclined surface 30s). The optical member 40 can be coupled (contacted) to the base covering portion 30b (vertical fixing portion 30f).

Step S9:
A defoaming process is performed on the sealing resin 34r (defoaming process).

  In a state where the columnar optical member 40p is fitted in the through hole 30e (pedestal covering portion 30b) of the vertical fixing portion 30f, the receiver substrate 22 is taken out from the table of the sealing resin dispenser 63 and accommodated in a vacuum desiccator (not shown). In this state, evacuation is performed by a vacuum pump (not shown), and a defoaming process for removing bubbles contained in the resin sealing portion 34 is performed.

Step S10:
The sealing resin 34r is heated and thermally cured (second thermosetting step).

  After the defoaming process, the receiver substrate 22 is taken out from a vacuum desiccator (not shown), and the sealing resin 34r is heated and cured at, for example, 160 ° C. for 40 minutes in a state where it is accommodated in an oven (not shown). By the thermosetting of the sealing resin 34r, the tip (bottom surface 40b) of the columnar optical member 40p is covered and fixed by the resin sealing portion 34 formed by curing the sealing resin 34r. That is, the columnar optical member 40p is fixed to the resin sealing portion 34 and is also fixed to the inserted vertical fixing portion 30f (through hole 30e).

Step S11 (FIG. 23):
FIG. 23 is a process perspective view showing a state in which a translucent adhesive is applied to the top surface of the columnar optical member in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  A translucent adhesive 36r for forming a translucent adhesive layer 36 for adhering the top surface 40a of the columnar optical member 40p and the translucent protective plate 41 is applied to the top surface 40a of the columnar optical member 40p (translucency). Adhesive application process).

  The positioning jig 70 on which the receiver substrate 22 is set is set at a predetermined position on a table (not shown) of the translucent adhesive dispenser 64, and a predetermined amount of translucent adhesive 36r is placed on the top surface 40a of the columnar optical member 40p. Apply thinly to the top.

  As the translucent adhesive 36r, a silicone resin having high translucency is applied. Also, the coating amount is such that the thickness of the formed transparent adhesive layer 36 is such that air is not included in the gap when the transparent protective plate 41 is placed on the columnar optical member 40p (top surface 40a). It should be about 0.5 mm.

Step S12 (FIG. 24):
FIG. 24 is a process perspective view showing a state in which the third adhesive is applied to the vertical fixing portion in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  A third adhesive 33r that covers the top surface 40a of the columnar optical member 40p and adheres the translucent protective plate 41 fixed to the vertical fixing portion 30f is applied to the top 30h of the vertical fixing portion 30f (third adhesion). Agent coating step).

  The positioning jig 70 on which the receiver substrate 22 is set is set at a predetermined position on a table (not shown) of the third adhesive dispenser 65, and is erected at the tip of the pedestal covering portion 30b that is placed and bonded to the pedestal portion 45. The third adhesive 33r is applied to the top 30h of the vertical fixing portion 30f. That is, the third adhesive 33r is applied in a frame shape to the top 30h using the positioning step 30m.

  The first adhesive 31r, the second adhesive 32r, and the third adhesive 33r may be the same resin, or the first adhesive dispenser 61, the second adhesive dispenser 62, and the third adhesive dispenser 65. The same device may be applied.

Step S13 (FIG. 25):
FIG. 25 is a process perspective view showing a state where the translucent protective plate is placed on the vertical fixing portion in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  The translucent protective plate 41 is placed on the top surface 40a of the columnar optical member 40p (translucent protective plate placing step). That is, the translucent protective plate 41 is placed on the top surface 40a coated with the translucent adhesive 36r and the vertical fixing portion 30f coated with the third adhesive 33r.

  A translucent adhesive 36r is thinly applied to the entire top surface 40a by a translucent adhesive dispenser 64, and a third adhesive 33r is formed in a frame shape by a third adhesive dispenser 65 on the top 30h of the vertical fixing portion 30f. Since the translucent protective plate 41 is placed after coating, the translucent adhesive layer 36 is formed between the top surface 40a and the translucent protective plate 41, and the translucent protective plate 41 is vertically disposed. It becomes possible to adhere to the mold fixing part 30f.

  The translucent protective plate 41 is positioned with respect to the vertical fixing portion 30f (the third adhesive portion 33) by using a positioning step 30m formed in conjunction with the top portion 30h to provide a translucent protection at the center of the vertical fixing portion 30f. Adjusting so that the plate 41 comes. In addition, since the third adhesive 33r is applied so as to fill the groove-shaped concave portion of the top portion 30h, the translucent protective plate 41 is firmly bonded (fixed) to the vertical fixing portion 30f. .

  Moreover, the translucent protective plate 41 spreads the translucent adhesive 36r thinly applied to the top surface 40a of the columnar optical member 40p, and the translucent protective plate 41 and the columnar optical member 40p (top surface 40a). Are bonded through a light-transmitting adhesive 36r (light-transmitting adhesive layer 36).

Step S14:
The translucent adhesive 36r and the third adhesive 33r are heated and thermally cured to form the translucent adhesive layer 36 and the third adhesive portion 33 (third thermosetting step).

  That is, with the receiver substrate 22 removed from the table of the third adhesive dispenser 65 and housed in an oven (not shown), the third adhesive 33r and the translucent adhesive 36r are heated at 150 ° C. for 30 minutes, for example. Heat cure. By the thermosetting of the third adhesive 33r and the translucent adhesive 36r, the vertical fixing portion 30f and the translucent protective plate 41 are integrated (coupled without a gap) by the third adhesive portion 33, so that the translucent protection is achieved. The plate 41 and the columnar optical member 40p are integrated (coupled without a gap) by the translucent adhesive layer 36.

Step S15 (FIG. 26):
FIG. 26 is a process perspective view showing a state where the cap part is placed on the vertical fixing part in the manufacturing process of the solar cell manufacturing method according to Embodiment 5 of the present invention.

  The cap part 60 which has the window frame 60b which covers the outer periphery end of the translucent protection board 41 is connected with the vertical fixing | fixed part 30f (cap part connection process).

  The cap part 60 is connected to the vertical fixing part 30f by aligning the direction so that the claw part 60d of the cap part 60 comes to the locking concave part 30k of the vertical fixing part 30f, and the cap part from above the vertical fixing part 30f. The cap portion 60 is attached to the vertical fixing portion 30f by placing the claw portion 60d so as to cover it and pressing the claw portion 60d until it is caught in the locking recess 30k.

Step after step S15:
After step S15, the receiver substrate 22 and the radiation fins 53 are connected and integrated by a fixing member 54h inserted through the attachment hole 22h and the base cover attachment hole 30j using a riveter (not shown). (Radiating fin mounting process).

  As described above, the solar cell manufacturing method according to the present embodiment includes the optical member 40 that transmits the concentrated sunlight Ls, the solar cell element 23 that photoelectrically converts the sunlight Ls that has passed through the optical member 40, and The receiver substrate 22 on which the solar cell element 23 is placed, the first adhesive portion 31 that is bonded to the receiver substrate 22 and is formed in a frame shape surrounding the solar cell element 23, and the solar cell element 23 that is in contact with the receiver substrate 22 , A pedestal portion 45 that is bonded to the first bonding portion 31, a resin sealing portion 34 that is surrounded by the first bonding portion 31 and covers the solar cell element 23, and a first portion 45 b formed on the top portion 45 b of the pedestal portion 45. A beam-shaped flange portion 30c that is bonded to the second bonding portion 32 and extends in a direction parallel to the receiver substrate 22, and an outer side of the pedestal portion 45 that extends outward from the beam-shaped flange portion 30c. With receiver A solar cell including a pedestal covering portion 30b having a coupling flange portion 30d connected to the plate 22 and a fixing portion 30 (vertical fixing portion 30f) for fixing the columnar optical member 40p formed as a columnar shape as the optical member 40. It is a solar cell manufacturing method which manufactures.

  Moreover, in the solar cell manufacturing method according to the present embodiment, the first adhesive application step of applying the first adhesive 31r forming the first adhesive portion 31 to the receiver substrate 22, and the pedestal portion on the first adhesive 31r. A pedestal portion placement step of attaching 45 to the receiver substrate 22; a second adhesive application step of applying a second adhesive 32r forming the second adhesion portion 32 to the top portion 45b of the pedestal portion 45; A pedestal covering portion 30b having a vertical fixing portion 30f as a fixing portion 30 which has a penetrating inclined surface 30s penetrating through the columnar optical member 40p and which is opposed to the inner end frame 30ct of the beam-like flange portion 30c. 2 A base covering portion placement step (which is also a fixing portion placement step for placing the fixing portion 30) that is bonded to the adhesive 32r and placed on the receiver substrate 22, and the first adhesive 31r and the second adhesive 32r Heat to first adhesive part A first thermosetting step for forming the first and second adhesive portions 32, and a columnar optical member disposing step for disposing the columnar optical member 40p so as to contact and fix the penetrating inclined surface 30s (an optical member for disposing the optical member 40) Disposing step) and a sealing resin injection step of injecting a sealing resin 34r for sealing the solar cell element 23 into the inner region of the first adhesive portion 31.

  Accordingly, the first adhesive application step, the pedestal portion placement step, the second adhesive application step, the pedestal covering portion placement step (fixed portion placement step), the columnar optical member placement step (optical member placement step), and the sealing resin The injection process is performed, and each component (first bonding portion 31, pedestal portion 45, second bonding portion 32, pedestal covering portion 30b (vertical fixing portion 30f as fixing portion 30), resin sealing portion 34, columnar shape The solar cell 21 having high heat resistance, weather resistance, and high reliability can be easily and accurately manufactured with high productivity through a simple process of sequentially aligning and aligning the optical members 40p (optical members 40)).

  Further, in the solar cell manufacturing method according to the present embodiment, a light-transmitting adhesive 36r that further forms a light-transmitting adhesive layer 36 that bonds the top surface 40a of the columnar optical member 40p and the light-transmitting protective plate 41 is used. Is applied to the top surface 40a of the columnar optical member 40p, and the translucent protective plate 41 that covers the top surface 40a of the columnar optical member 40p and is fixed to the vertical fixing portion 30f is bonded. A third adhesive applying step for applying the third adhesive 33r to the top 30h of the vertical fixing portion 30f, and a translucent protective plate mounting for placing the translucent protective plate 41 on the top surface 40a of the columnar optical member 40p. A placing step, a third thermosetting step in which the translucent adhesive 36r and the third adhesive 33r are heated and thermoset to form the translucent adhesive layer 36 and the third adhesive portion 33, and the translucent protective plate 41. Cap portion 60 having window frame 60b covering the outer peripheral edge of 41 is vertically And a cap portion connecting step of connecting the fixing portion 30f.

  Therefore, with respect to the 1st adhesion part 31, the pedestal part 45, the 2nd adhesion part 32, the pedestal covering part 30b (fixed part 30: vertical type fixed part 30f), and the optical member 40 (columnar optical member 40p) which were piled up and constituted. Further, a third adhesive application step, a translucent adhesive application step, a translucent protective plate placement step, a third thermosetting step, and a cap portion connection step are performed, and each component member (third adhesive portion 33, The solar cell 21 having high heat resistance, weather resistance, and reliability can be easily and accurately obtained by a simple process of sequentially aligning and aligning the light-transmitting adhesive layer 36, the light-transmitting protective plate 41, and the cap portion 60). It can be manufactured with high productivity.

  Further, the sealing resin injection step of injecting the sealing resin 34r for sealing the solar cell element 23 into the inner region of the first adhesive portion 31 is performed before the first adhesive application step until the columnar optical member placement step. Can be implemented. Preferably, it implements after forming the 1st adhesion part 31 and the 2nd adhesion part 32 in the 1st thermosetting process until the columnar optical member arrangement process. In addition to the sealing resin injection process, a defoaming process process for defoaming the sealing resin 34r and a second thermosetting process for heating and thermosetting the sealing resin 34r are performed. Is preferred.

  In addition, the solar cell manufacturing method according to the present embodiment includes an optical member 40 that transmits the concentrated sunlight Ls, a solar cell element 23 that photoelectrically converts the sunlight Ls that has passed through the optical member 40, and a solar cell. A receiver substrate 22 on which the element 23 is placed, a first adhesive portion 31 that is bonded to the receiver substrate 22 and is formed in a frame shape surrounding the solar cell element 23, and abuts on the receiver substrate 22 to surround the solar cell element 23. The solar cell manufacturing that manufactures the solar cell 21 including the pedestal portion 45 bonded to the first bonding portion 31 and the fixing portion 30 (fitting fixing portion 30r) that fixes the optical member 40 with reference to the pedestal portion 45. It is also a method.

  That is, in the solar cell manufacturing method according to the present embodiment, the first adhesive application step of applying the first adhesive 31r forming the first adhesive portion 31 to the receiver substrate 22, and the pedestal portion on the first adhesive 31r. 45 is attached to the receiver substrate 22, and a first thermosetting step of heating the first adhesive 31r to form the first adhesive portion 31, and a fixing portion 30 (vertical fixing). An optical member disposing step of disposing the optical member 40 (columnar optical member 40p) in the portion 30f).

  Therefore, a 1st adhesive agent application process, a base part mounting process, a 1st thermosetting process, and an optical member arrangement | positioning process are performed, and each structural member (The 1st adhesion part 31, the base part 45, the optical member 40 (columnar optical member) 40p)) are sequentially stacked and aligned, and the solar cell 21 having high heat resistance, weather resistance, and high reliability can be easily and accurately manufactured with high productivity.

DESCRIPTION OF SYMBOLS 20 Concentration type photovoltaic power generation module 21 Solar cell 22 Receiver board | substrate 22h Mounting hole 23 Solar cell element 30 Fixed part 30b Base coating | cover part 30c Beam-like flange part 30ct Inner front end frame 30d Coupling flange part 30e Through-hole 30f Vertical fixed part (Fixed part)
30g Through groove 30h Top 30j Base cover mounting hole 30k Locking recess 30m Positioning step 30r Fitting fixing part (fixing part)
30s penetrating inclined surface 31 first adhesive portion 31r first adhesive 32 second adhesive portion 32r second adhesive 33 third adhesive portion 33r third adhesive 34 resin sealing portion 34r sealing resin 36 translucent adhesive layer 36r Translucent adhesive 40 Optical member 40a Top surface 40b Bottom surface 40c Optical path inclined surface 40f First flat plate optical member (optical member)
40s second flat plate optical member (optical member)
40st Outer peripheral edge 40p Columnar optical member (optical member)
41 translucent protective plate 45 base 45a through opening 45b top 45c bottom 45d bottom recess 45f outer peripheral frame 50 condenser lens 51 lens frame 52 base plate 54h, 54p fixing member 55b, 55t fixing member 60 cap part 60a flat part 60b Window frame 60c Frame portion 60d Claw portion 61 First adhesive dispenser
62 Second adhesive dispenser
63 Sealing resin dispenser
64 Translucent adhesive dispenser
65 Third adhesive dispenser
70 Positioning jig 71 Positioning pin Lax Optical axis Ls Sunlight

Claims (9)

A solar cell comprising an optical member that transmits condensed sunlight, a solar cell element that photoelectrically converts sunlight transmitted through the optical member, and a receiver substrate on which the solar cell element is placed,
A first adhesive portion formed in a frame shape that is adhered to the receiver substrate and surrounds the solar cell element;
A pedestal that is in contact with the receiver substrate and surrounds the solar cell element and is bonded to the first bonding portion;
A solar cell comprising: a resin sealing portion surrounded by the first adhesive portion and covering the solar cell element. The solar cell according to claim 1,
The optical member is a flat plate-shaped first flat plate optical member, and the first flat plate optical member is disposed between the first adhesive portion and the pedestal portion. . The solar cell according to claim 1,
A beam-like flange portion formed on the top of the pedestal portion, the beam-like flange portion being bonded to the second adhesion portion and extending in a direction parallel to the receiver substrate, and outward from the beam-like flange portion A solar cell, comprising: a pedestal covering portion which is extended and has a coupling flange portion connected to the receiver substrate outside the pedestal portion. The solar cell according to claim 3,
The optical member is a flat plate-like second flat plate optical member, and the second flat plate optical member is placed on the top of the pedestal portion and has an outer peripheral end covered with the beam-like flange portion. Solar cell featuring. The solar cell according to claim 3,
The optical member is a columnar optical member whose top surface is columnar than the bottom surface, and the columnar optical member is fixed by a fixing portion at an inner end of the beam-shaped flange portion. . The solar cell according to claim 5,
The said fixing | fixed part is a vertical fixing | fixed part erected in the inner side front end frame of the said beam-like flange part which has the penetration inclined surface which penetrates the said columnar optical member, and opposes.   A concentrating solar power generation module comprising a condensing lens that condenses sunlight and a solar cell that receives and photoelectrically converts the condensed sunlight, wherein the solar cell comprises: A concentrating solar power generation module, which is the solar cell according to any one of Items 6. An optical member that transmits the concentrated sunlight, a solar cell element that photoelectrically converts sunlight transmitted through the optical member, a receiver substrate on which the solar cell element is mounted, and an adhesive member that is bonded to the receiver substrate A first adhesive portion formed in a frame shape surrounding the solar cell element, a pedestal portion that is in contact with the receiver substrate and is bonded to the first adhesive portion so as to surround the solar cell element, and the pedestal portion as a reference And a solar cell manufacturing method for manufacturing a solar cell comprising a fixing part for fixing the optical member,
A first adhesive application step of applying a first adhesive forming the first adhesive portion to the receiver substrate;
A pedestal portion placing step of attaching the pedestal portion to the first adhesive and placing the pedestal portion on the receiver substrate;
A first thermosetting step of heating the first adhesive to form the first adhesive portion;
An optical member arranging step of arranging the optical member on the fixed portion. An optical member that transmits the concentrated sunlight, a solar cell element that photoelectrically converts sunlight transmitted through the optical member, a receiver substrate on which the solar cell element is mounted, and an adhesive member that is bonded to the receiver substrate A first adhesive portion formed in a frame shape surrounding the solar cell element; a pedestal portion which is in contact with the receiver substrate and surrounds the solar cell element and is bonded to the first adhesive portion; and the first adhesive portion. A resin sealing portion that is surrounded and covers the solar cell element, and a second adhesive portion that is formed on the top of the pedestal portion, and is bonded to the second adhesive portion and extends in a direction parallel to the receiver substrate. A pedestal covering portion having a beam-shaped flange portion and a coupling flange portion extending outward from the beam-shaped flange portion and coupled to the receiver substrate outside the pedestal portion; and a columnar shape as the optical member. The columnar optical member A solar cell manufacturing method for manufacturing a solar cell and a tough,
A first adhesive application step of applying a first adhesive forming the first adhesive portion to the receiver substrate;
A pedestal portion placing step of attaching the pedestal portion to the first adhesive and placing the pedestal portion on the receiver substrate;
A second adhesive application step of applying a second adhesive forming the second adhesive portion to the top of the pedestal portion;
The pedestal covering portion having a vertical fixing portion as the fixing portion, which has a penetrating inclined surface that penetrates the columnar optical member and faces each other and is erected on an inner end frame of the beam-like flange portion, is the second adhesion. A pedestal covering portion mounting step for mounting on the receiver substrate by bonding to the agent;
A first thermosetting step of heating the first adhesive and the second adhesive to form the first adhesive portion and the second adhesive portion;
A columnar optical member arranging step of arranging the columnar optical member so as to contact and fix the penetrating inclined surface;
And a sealing resin injection step of injecting a sealing resin for sealing the solar cell element into the inner region of the first adhesive portion.

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