JP2009044047A - Solar-battery module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar-battery module which can prevent a panel from being deformed and damaged even when the solar-battery module is enlarged. <P>SOLUTION: This solar-battery module 20 each includes a substrate 8 and a power generation layer 10, a solar cell panel 3 and a solar cell panel 4 which are arranged to be adjacent each other, an exterior frame 1 formed in a frame shape for supporting a peripheral part of regions other than the region where the solar cell panel 3 and the solar cell panel 4 are adjacent each other, and an interior frame 2 arranged in the region where the solar cell panel 3 and the solar cell panel 4 are adjacent each other for supporting a peripheral part of the region where solar cell panel 3 and solar cell panel 4 are adjacent each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a solar cell module, and more particularly to a solar cell module including a frame formed in a frame shape.

  Conventionally, a solar cell module provided with a frame formed in a frame shape is known (see, for example, Patent Documents 1 and 2).

  In the solar cell module of Patent Document 1, a frame-like frame for supporting the peripheral edge of one panel is provided with a rib extending so as to cross the frame. In the said patent document 1, it is suppressing that a panel deform | transforms by supporting from the back surface of a panel by this rib.

  Moreover, in the said patent document 2, the structure by which the peripheral part of one panel is hold | maintained only by an outer frame is disclosed.

Japanese Patent No. 3673234 Japanese Patent Laid-Open No. 11-135811

  However, in the configuration in which the peripheral portion of one panel is held only by the outer frame as in Patent Document 2, when the solar cell module is enlarged together with the panel, the panel is subjected to a load in the vertical direction. There is a problem that the panel is easily deformed, and as a result, the panel may be damaged.

  In addition, in the configuration in which the rib is supported from the back surface of one panel as in Patent Document 1, the panel can be prevented from being deformed by a load from above the panel, while the solar cell module is large together with the panel. It is considered difficult to suppress the deformation of the panel against the load applied to the panel from the lower side such as wind pressure. Also in this case, there is a problem that the panel may be damaged due to deformation.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to prevent the panel from being deformed and damaged even when the solar cell module is enlarged. It is providing the solar cell module which can be suppressed.

Means for Solving the Problems and Effects of the Invention

  A solar cell module according to an aspect of the present invention includes a substrate and a power generation layer, respectively, and a first panel and a second panel arranged so as to be adjacent to each other, and regions other than adjacent regions of the first panel and the second panel The first frame formed in a frame shape for supporting the outer peripheral portion of the first area and the first panel and the second panel adjacent to each other, and the first panel and the second panel adjacent to each other And a second frame for supporting the outer peripheral portion.

  In the solar cell module according to this one aspect, as described above, the first frame formed in a frame shape for supporting the outer peripheral portion of the region other than the regions adjacent to each other of the first panel and the second panel, The first frame and the second panel are provided in a region adjacent to each other of the first panel and the second panel, and a second frame for supporting an outer peripheral portion of the region adjacent to each other of the first panel and the second panel. The first panel and the second panel can be supported by the frame. In this case, unlike the case where the solar cell module is configured by a single panel, the first panel and the second panel are not enlarged, and the panel has a sufficient strength against the vertical load on the panel. A large-sized solar cell module can be constituted by the first panel and the second panel having a large size. As described above, by supporting the first panel and the second panel having appropriate sizes by the first frame and the second frame, it is possible to suppress the deformation of the first panel and the second panel. Therefore, in this invention, even when a solar cell module enlarges, it can suppress that a panel (a 1st panel and a 2nd panel) deform | transforms and is damaged.

  In the above configuration, the second frame is preferably configured to support the upper surface and the lower surface of the outer peripheral portion of the first panel and the second panel adjacent to each other.

  In the above configuration, the second frame is preferably made of an insulating member.

  In the above configuration, preferably, the first panel and the second panel are electrically connected via a conducting wire provided so as to penetrate through the second frame.

  In the above configuration, preferably, the second frame is disposed so as to cross the first frame, and supports substantially the entire outer periphery of the adjacent regions of the first panel and the second panel. The both ends of the second frame are fixed to the first frame.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

  FIG. 1 is an exploded perspective view showing a configuration of a solar cell module according to an embodiment of the present invention. FIG. 2 is a plan view showing a solar cell module according to an embodiment of the present invention. 3-6 is a figure for demonstrating in detail the structure of the solar cell module shown in FIG. First, with reference to FIGS. 1-6, the structure of the solar cell module 20 by one Embodiment of this invention is demonstrated.

  As shown in FIGS. 1 and 2, the solar cell module 20 includes an outer frame 1, an inner frame 2, and two solar cell panels 3 and 4 arranged adjacent to each other.

  The outer frame 1 is made of a metal such as Al and is formed in a rectangular shape having a short side 1a and a long side 1b when viewed in a plan view. Further, the outer frame 1 integrally includes a support portion 1c for supporting the outer peripheral portions of the solar cell panels 3 and 4 from the outside and a leg portion 1d.

  As shown in FIGS. 3 and 4, the support portion 1c has an opening toward the inside and is formed to have a U-shaped cross-sectional shape. Further, the support portion 1c sandwiches the outer peripheral portions of the regions 3b (see FIG. 1) other than the regions 3a and 4a adjacent to each other of the solar cell panel 3 and the solar cell panel 4 from above and below by the U-shaped portion. I support it. The width of the opening of the support portion 1c (the distance between the upper surface and the lower surface) is larger than the thickness of the solar cell panels 3 and 4, and rubber or the like is provided between the support portion 1c and the solar cell panels 3 and 4. The sealing material 5 (refer FIG. 4) which consists of these elastic materials is filled.

  Also, as shown in FIG. 1, four screw holes 1f are provided on the inner side surface 1e of the leg portion 1d at positions corresponding to the center portions of the long sides 1b facing each other.

  The inner frame 2 is formed of an insulating resin, and is disposed so as to cross the outer frame 1 in the short direction (A direction). The inner frame 2 integrally includes a support portion 2a for supporting the outer peripheral portions of the solar cell panels 3 and 4 from the inside and a leg portion 2b.

  The support portion 2a has openings toward both sides in the B direction and is formed to have an H-shaped cross-sectional shape, and the H-shaped portion causes the solar cell panels 3 and 4 to be adjacent to each other. It supports so that the substantially whole area of the outer peripheral part of 3a and 4a may be pinched | interposed from the upper and lower sides. 5, as in the case of the outer frame 1, the width of the opening of the support portion 2a of the inner frame 2 is larger than the thickness of the solar cell panels 3 and 4, and the support portion 2a and the solar cell panel Between 3 and 4, a sealing material 6 made of an elastic material such as rubber is filled.

  In addition, four screw insertion holes 2c are provided at both ends in the A direction of the leg 2b. As shown in FIGS. 4 and 6, the screw insertion hole 2 c of the inner frame 2 and the screw hole 1 f of the outer frame 1 are fastened with screws 7, so that both ends of the inner frame 2 are fixed to the outer frame 1. Has been. Further, as shown in FIG. 5, a hole 2f that penetrates from one side surface 2d of the leg portion 2b to the other side surface 2e is provided in the center portion in the A direction of the leg portion 2b. Further, a cover 2g made of an insulating resin is attached to the one side surface 2d and the other side surface 2e with silicone so as to cover the vicinity of the opening of the hole 2f.

  Moreover, as shown in FIG. 1, the solar cell panels 3 and 4 are thin film type solar cell panels, and a plurality of cells 3d and 4d having a power generation function separated by grooves 3c and 4c extending in the A direction are B It has a structure connected in series in the direction. Further, as shown in FIG. 5, the solar cell panels 3 and 4 include a substrate 8, a surface electrode layer 9, a power generation layer 10, a back electrode layer 11, a sealing resin 12, and a back sheet 13 laminated. Has a structured.

The substrate 8 is made of light-transmitting glass. A surface electrode layer 9 is formed on the upper surface of the substrate 8. The surface electrode layer 8 is made of TCO (Transparent Conductive Oxide) such as tin oxide (SnO ₂ ) having conductivity and translucency.

  A power generation layer 10 is formed on the upper surface of the surface electrode layer 9. The power generation layer 10 includes a photoelectric conversion layer made of a pin-type amorphous silicon-based semiconductor and a photoelectric conversion layer made of a pin-type microcrystalline silicon-based semiconductor.

  A back electrode layer 11 is formed on the upper surface of the power generation layer 10. A sealing resin 12 made of EVA (Ethylene-Vinyl Acetate) is formed on the upper surface of the back electrode layer 11. A back sheet 13 made of PET (Polyethylene Terephthalate) is formed on the upper surface of the sealing resin 12. Further, as shown in FIG. 5, in this embodiment, the solar cell panel 3 and the back electrode layer 11 of the cells 3d and 4d on the inner frame 2 side of the solar cell panel 4 are each made of a collection of copper foil leads. Electrodes 14 and 15 are provided. The end portion 14 a of the collector electrode 14 and the end portion 15 a of the collector electrode 15 are exposed on the back sheet 13 through notches provided in the sealing resin 12 and the back sheet 13. Further, the end portion 14 a of the collector electrode 14 exposed on the back sheet 13 and the end portion 15 a of the collector electrode 15 are electrically connected by a connection lead wire 16 passed through the hole 2 f of the inner frame 2. . The cover 2g has a function of protecting the exposed connection lead wire 16.

  Next, the manufacturing process of the solar cell module 20 according to the present embodiment will be described.

  First, as shown in FIG. 5, solar cell panels 3 and 4 including a substrate 8, a front electrode layer 9, a power generation layer 10, a back electrode layer 11, a sealing resin 12, and a back sheet 13 are formed. That is, a solar cell in which a plurality of cells (cells 3d and 4d) are connected in series by laminating a surface electrode layer 9, a power generation layer 10 and a back electrode layer 11 on a substrate 8 made of glass and performing patterning with a laser. A battery panel is formed. Thereafter, copper foil leads as collector electrodes 14 and 15 are attached by ultrasonic soldering on the back electrode layer 11 of the cell located at the end of the solar cell panel.

  Thereafter, an EVA sheet and a PET sheet are laminated on the solar cell panel (on the back electrode layer 11 and the collector electrode (collector electrode 14 and collector electrode 15)), and heated in a vacuum at about 150 ° C. with a laminator (crimping device). To perform pressure bonding. At this time, the portions corresponding to the collector electrodes (collector electrodes 14 and 15) of the EVA sheet and the PET sheet were cut, and the ends of the collector electrodes 14 and 15 were drawn from the cut portions of the sealing resin 12 and the back sheet 13. Crimp in the state. Thereby, the solar cell panel 3 from which the end portion 14a of the collector electrode 14 is drawn out and the solar cell panel 4 from which the end portion 15a of the collector electrode 15 is drawn out are formed.

  Then, the two solar cell panels 3 and 4 formed as described above are attached to the support portion 1c of the outer frame 1 and the support portion 2a of the inner frame 2, respectively, as sealing materials 5 and 6 made of an elastic body such as rubber. At the same time, the screw 7 is tightened into the screw insertion hole 2 c of the inner frame 2 through the screw hole 1 f of the outer frame 1. Thereafter, the end portion 14a of the collector electrode 14 drawn out on the surface of the solar cell panel 3 and the end portion 15a of the collector electrode 15 drawn out on the surface of the solar cell panel 4 are connected through the hole 2f of the inner frame 2. The connection lead wire 16 passed through is connected. And the terminal cover 2g is attached with silicone so that the part exposed to the surface of the inner side frame 2 of the connection lead wire 16 may be covered. Thus, the solar cell module 20 according to the present embodiment is manufactured.

  In the present embodiment, as described above, the outer frame 1 formed in a frame shape for supporting the outer peripheral portions of the regions 3b and 4b other than the regions 3a and 4a adjacent to each other of the solar cell panel 3 and the solar cell panel 4. And an inner frame 2 that is disposed in regions adjacent to each other of the solar cell panel 3 and the solar cell panel 4 and supports the outer peripheral portions of the regions 3a and 4b adjacent to each other of the solar cell panel 3 and the solar cell panel 4. By providing, the solar cell panel 3 and the solar cell panel 4 can be supported by the outer frame 1 and the inner frame 2. In this case, unlike the case where the solar cell module is configured by one panel, the solar cell panel 3 and the solar cell panel 4 themselves are not enlarged, and sufficient for the vertical load on the solar cell panel. A large-sized solar cell module can be constituted by the solar cell panel 3 and the solar cell panel 4 having an appropriate size having strength. As described above, by supporting the solar cell panel 3 and the solar cell panel 4 having appropriate sizes by the outer frame 1 and the inner frame 2, the solar cell panel 3 and the solar cell panel 4 can be prevented from being deformed. it can. Therefore, in this invention, even when a solar cell module enlarges, it can suppress that a solar cell panel (solar cell panel 3 and the solar cell panel 4) deform | transforms. Thereby, the deformation | transformation of the solar cell panels 3 and 4 can be suppressed, without strengthening the intensity | strength of the outer side frame 1. FIG. Moreover, since it can suppress that a solar cell panel deform | transforms, without strengthening the intensity | strength of solar cell panel itself, even if it reduces the thickness of the board | substrate 8 which consists of glass, for example, a solar cell panel deform | transforms. Can be suppressed. By reducing the thickness of the substrate 8, the amount of light transmitted through the substrate 8 and incident on the power generation layer 10 can be increased, so that the output of the solar cell module 20 can be increased.

  Moreover, in this embodiment, by supporting the upper surface and lower surface of the outer peripheral part of the area | regions 3a and 4a which the solar cell panel 3 and the solar cell panel 4 mutually adjoin with the support part 2a of the inner side frame 2 as mentioned above. Unlike the case where the solar cell panel is supported only from the lower surface, the solar cell panels 3 and 4 can be supported more firmly. Moreover, since the outer peripheral part without a power generation function can be supported by supporting the upper surface and the lower surface of the outer peripheral part of the solar cell panels 3 and 4, the solar cell panel 3 without shielding the part having the power generation function. And 4 can be supported not only from the lower surface but also from the upper surface. As a result, the solar cell panels 3 and 4 are supported also from the upper surface while suppressing the occurrence of so-called hot spots, which is a phenomenon in which the output decreases due to an increase in the temperature of the light-shielded portion. Can do.

  In the present embodiment, as described above, the inner frame 2 is made of an insulating resin, so that the inner frame 2 and the solar cell panels 3 and 4 are different from the case where the inner frame is made of a conductive member. There is no need to separate the part having the power generation function. Therefore, since the part which has the power generation function of a solar cell panel can be extended to the inner frame 2 side to a limit, a power generation area can be expanded.

  In the present embodiment, as described above, the solar cell panel 3 and the solar cell panel 4 are electrically connected via the connection lead wires 16 provided so as to penetrate the inner frame 2. The connection lead wire 16 can be prevented from being damaged.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, the example in which the two solar cell panels 3 and 4 are supported by the rectangular outer frame 1 and the linear inner frame 2 is shown, but the present invention is not limited thereto, and the rectangular shape is used. Four solar cell panels may be supported by the outer frame and the cross-shaped inner frame. Further, the three solar cell panels may be supported by a rectangular outer frame and two linear inner frames.

  In the above embodiment, an example using a thin-film solar cell panel has been shown. However, the present invention is not limited to this, and other solar cell panels such as a crystal solar cell panel and a compound solar cell panel are used. May be used.

  Moreover, although the example which provided the sealing material 6 between the inner side frame 2 and the solar cell panels 3 and 4 was shown in the said embodiment, this invention is not limited to this and does not need to provide a sealing material.

  Moreover, although the example which used EVA as sealing resin was shown in the said embodiment, this invention is not restricted to this, You may use EEA, PVB, silicone, urethane, an acryl, or an epoxy.

In the above embodiment, an example of using the PET as a backsheet, the present invention is not limited to this, PVF, a plastic film such as PEN, metal foil and a laminate, metallized film, such as SiO _x, etc. Alternatively, a metal such as SUS or galvalume may be used.

  Moreover, although the example which formed the outer side frame with Al was shown in the said embodiment, this invention is not restricted to this, You may form with other metals or resin, such as iron and SUS.

It is a disassembled perspective view which shows the solar cell module by one Embodiment of this invention. It is a top view which shows the solar cell module by one Embodiment of this invention. It is a side view which shows the solar cell module by one Embodiment of this invention. FIG. 3 is a cross-sectional view taken along line 100-100 in FIG. 2. FIG. 3 is a cross-sectional view taken along line 200-200 in FIG. 2. It is sectional drawing along the 300-300 line of FIG.

Explanation of symbols

1 Outer frame (first frame)
2 Inner frame (second frame)
3 Solar panel (first panel)
4 Solar panel (second panel)
8 Substrate 10 Power generation layer 16 Connection lead (conductive wire)
20 Solar cell module

Claims (5)

A first panel and a second panel, each including a substrate and a power generation layer and disposed adjacent to each other;
A first frame formed in a frame shape for supporting an outer peripheral portion of a region other than the regions adjacent to each other of the first panel and the second panel;
A solar cell module comprising: a second frame disposed in a region adjacent to each other of the first panel and the second panel, and supporting an outer peripheral portion of the region adjacent to the first panel and the second panel. .   2. The solar cell module according to claim 1, wherein the second frame is configured to support an upper surface and a lower surface of an outer peripheral portion of a region adjacent to each other of the first panel and the second panel.   The solar cell module according to claim 1, wherein the second frame is made of an insulating member.   4. The solar cell module according to claim 3, wherein the first panel and the second panel are electrically connected via a conducting wire provided so as to penetrate through the second frame. 5. The second frame is arranged so as to cross the first frame, and is configured to support substantially the entire outer peripheral portion of the adjacent region of the first panel and the second panel, And the solar cell module of any one of Claims 1-4 by which the both ends of the said 2nd frame are being fixed to the said 1st frame.

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