JP2013084671A - Solar battery module and solar battery module array - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery module which permits solar battery cells to be connected in parallel to each other between solar battery modules and a solar battery module array composed of these solar battery modules which are combined (connected in parallel).SOLUTION: A solar battery module 1 comprises: a cell group 11 composed of a plurality of solar battery cells PV1 which are connected in series to each other via a junction point CP1; terminal parts TP1 connected to the junction point CP1; and at least a pair of tab parts TB (tab part TB1 and tab part TB2) which have the terminal parts TP1 disposed therein and which are formed on the outside of the cell group 11. The tab parts TB are disposed axial symmetrically to each other, and the terminal parts TP1 are disposed point symmetrically in each of the tab parts TB.

Description

  The present invention relates to a solar cell module having a terminal portion connected to a connection point between solar cells connected in series with each other, and a solar cell module array in which such solar cell modules are connected in parallel.

  It is an era when the use of natural energy is required, and for example, solar cells that convert sunlight into electricity and solar cell modules in which solar cells are interconnected are drawing attention. Various technical proposals have been made in response to increasing expectations for such solar cells and solar cell modules. For example, a technique for forming a solar cell module by mounting solar cells on a wiring board has been proposed (see, for example, Patent Document 1).

  Moreover, since a solar cell converts sunlight into electricity, it is directly affected by the state of sunlight. For example, photovoltaic power cannot be generated when a shade generated by shading sunlight falls on a solar cell (or solar cell module). That is, the substantial power generation efficiency varies depending on the state of occurrence of the shade, and in some cases, it may be greatly reduced. As a countermeasure against the shade for avoiding the influence of such a shade, for example, a solar cell module in which solar cells are connected in parallel with each other has been proposed (see, for example, Patent Document 2).

  According to the technique described in Patent Document 2, since the solar cells inside the solar cell module are connected in parallel to each other, an effect as a measure against the shadow is expected. Limited to the inside of the module. Therefore, the range of the shade where the effect is obtained may be limited to the inside of the module and may not match the actual shade situation. That is, it is difficult to increase the capacity of the solar cell module array in which the solar cell modules are connected in parallel to each other and the shade is taken.

JP 2010-245398 A JP 2010-287795 A

  The present invention has been made in view of such a situation, and by providing a terminal portion connected to a connection point of solar cells connected in series, the solar cells are arranged between adjacent solar cell modules. It aims at proposing the solar cell module which can connect a battery cell mutually in parallel.

  Another object of the present invention is to provide a solar cell module array in which a plurality of solar cell modules according to the present invention are connected to prevent a decrease in power generation efficiency due to shadows.

  The solar cell module according to the present invention includes a cell group in which a plurality of solar cells are connected in series with each other via a connection point, a terminal portion connected to the connection point, and the terminal portion. And at least a pair of tab portions formed on the outside of the tab portions, the tab portions are arranged symmetrically with respect to each other, and the terminal portions are arranged symmetrically with respect to the tab portions. .

  Therefore, in the solar cell module according to the present invention, the terminal portions arranged on at least a pair of tab portions formed outside the cell group and arranged in line symmetry are arranged point-symmetrically in the tab portions. When connecting solar cells of a plurality of solar cell modules in parallel, the terminal portions of adjacent tab portions can be easily connected to each other, so that the solar cells are arranged in parallel without providing a special wiring area for parallel connection. Can be connected.

  Moreover, in the solar cell module according to the present invention, the tab portions are two pairs, and the pairs are arranged at different positions.

  Therefore, in the solar cell module according to the present invention, the terminal portions are led out in four different directions (four locations) according to the arrangement of the tab portions, and when arranged side by side, the terminal portions connected in parallel increase. The degree of freedom in parallel connection, workability, and reliability can be improved.

  Further, in the solar cell module according to the present invention, there are a plurality of the connection points, and each of the terminal portions having the same number as the plurality of connection points is a pair connected to each other in the tab portion. Is point-symmetrical arrangement.

  Therefore, the solar cell module according to the present invention is point-symmetric as a pair (two terminal portions corresponding to one connection point) in which a plurality of terminal portions having the same number as the plurality of connection points are connected to each other at the tab portion. Therefore, parallel connection by rotating 180 degrees is facilitated, so that the degree of freedom in arrangement can be improved even when a plurality of connection points (a plurality of terminal portions) are provided.

  Moreover, in the solar cell module according to the present invention, the cell group has a pseudo-rectangular outer periphery in which four corners of the rectangle are hypotenuses, and the tab portion is disposed at the corner. Features.

  Therefore, since the solar cell module according to the present invention arranges the tab portions at the four corners of the pseudo rectangle, the tab portions can be opposed to each other at the corners when the solar cell modules are arranged in a matrix. Therefore, without increasing the area for parallel connection, the filling rate of solar cells can be improved and the power generation efficiency per arrangement area can be improved.

  In the solar cell module according to the present invention, the cell group is mounted on a single wiring board, and the tab portion is formed by extending the wiring board.

  Therefore, since the solar cell module according to the present invention mounts the cell group on the wiring board and extends the tab portion from the wiring board, the integrity can be secured, so that the reliability and workability can be improved. it can.

  In the solar cell module according to the present invention, the wiring board is a double-sided wiring, and the terminal portion is formed as a double-sided wiring connected to each other at the tab portion.

  Therefore, since the solar cell module according to the present invention can easily connect the terminal portions of the tab portions arranged adjacent to each other, it is possible to improve the workability of the parallel connection and easily increase the capacity. it can.

  In the solar cell module according to the present invention, the solar cell is a pseudo square in which four corners of a square are hypotenuses.

  Therefore, the solar battery module according to the present invention is a crystalline solar battery cell with high power generation efficiency because the solar battery cell is formed in a pseudo square (pseudo octagon) with the four corners of the square as hypotenuses. Can be used to improve the area filling rate, productivity, and power generation efficiency.

  Moreover, in the solar cell module according to the present invention, the solar cell is formed by dividing a pseudo square in which four corners of a square are hypotenuses.

  Therefore, the solar cell module according to the present invention can easily and efficiently form a plurality of solar cells connected in series, and can improve productivity and increase the voltage.

  The solar cell module array according to the present invention is characterized in that a plurality of solar cell modules according to the present invention are connected.

  Therefore, the solar cell module array which concerns on this invention can prevent the fall of the power generation efficiency by a shadow by connecting the photovoltaic cell with which a solar cell module is equipped in parallel.

  A solar cell module according to the present invention includes a terminal portion connected to a connection point where solar cells are connected in series, and a pair of tab portions on which the terminal portions are arranged, and the tab portions are arranged symmetrically with each other. The terminal part is arranged point-symmetrically at the tab part.

  Therefore, since the solar cell module according to the present invention can easily connect the terminal portions of the adjacent tab portions when connecting the solar cells of the plurality of solar cell modules in parallel, a special wiring area for parallel connection There is an effect that the solar cells can be connected in parallel without providing.

  The solar cell module array according to the present invention is characterized in that a plurality of solar cell modules according to the present invention are connected.

  Therefore, the solar cell module array according to the present invention has an effect of preventing a decrease in power generation efficiency due to a shadow.

It is a schematic plan view which shows typically the planar shape of the solar cell module which concerns on Embodiment 1 of this invention. It is a schematic circuit diagram which shows typically the connection structure of the solar cell module shown to FIG. 1A. It is a schematic plan view which shows typically the planar shape of the solar cell module array which concerns on Embodiment 2 of this invention. It is a schematic circuit diagram which shows typically the connection structure of the solar cell module array shown to FIG. 2A. It is a schematic plan view which shows typically the planar shape of the solar cell module which concerns on Embodiment 3 of this invention. It is a schematic circuit diagram which shows typically the connection structure of the solar cell module shown to FIG. 3A. It is a schematic plan view which shows typically the planar shape of the solar cell module array which concerns on Embodiment 4 of this invention. It is a schematic circuit diagram which shows typically the connection structure of the solar cell module array shown to FIG. 4A. It is a schematic plan view which shows typically the planar shape of the solar cell module which concerns on Embodiment 5 of this invention. It is a schematic circuit diagram which shows typically the connection structure of the solar cell module shown to FIG. 5A. It is a schematic plan view which shows typically the planar shape of the solar cell module array which concerns on Embodiment 6 of this invention. It is a schematic circuit diagram which shows typically the connection structure of the solar cell module array shown to FIG. 6A. It is a schematic plan view which shows typically the planar shape of the solar cell module array which concerns on Embodiment 7 of this invention. It is a schematic circuit diagram which shows typically the connection structure of the solar cell module array shown to FIG. 7A. It is a schematic plan view which shows typically the planar shape of the solar cell module array which concerns on Embodiment 8 of this invention. It is a schematic circuit diagram which shows typically the connection structure of the solar cell module array shown to FIG. 8A. It is a schematic plan view which shows typically the planar shape of the solar cell module which concerns on Embodiment 9 of this invention. It is a schematic top view which shows typically the planar shape of the solar cell module array formed by connecting the solar cell module shown to FIG. 9A in parallel. It is a schematic plan view which shows typically the modification of arrangement | positioning of the terminal part in the tab part of the solar cell module shown to FIG. 9A. It is a schematic plan view which shows typically the planar shape of the solar cell module which deform | transformed the shape of the terminal part of the solar cell module shown to FIG. 9A. It is an enlarged plan view which expands and shows the terminal part of the solar cell module shown to FIG. 9D. It is a schematic plan view which shows typically a planar state when a shadow falls on the solar cell module array (solar cell module) shown to FIG. 9B. It is a schematic circuit diagram which shows typically the circuit state by the shadow to the solar cell module array shown to FIG. 10A.

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

<Embodiment 1>
With reference to FIG. 1A and FIG. 1B, the solar cell module 1 which concerns on this Embodiment is demonstrated.

  FIG. 1A is a schematic plan view schematically showing a planar shape of solar cell module 1 according to Embodiment 1 of the present invention.

  FIG. 1B is a schematic circuit diagram schematically showing a connection configuration of the solar cell module 1 shown in FIG. 1A.

  In the solar cell module 1 according to the present embodiment, a plurality of (for example, two) solar cells PV1 are connected in series to each other via a connection point CP1 (for example, one) and a connection point CP1. Terminal portion TP1 and at least a pair of tab portions TB (tab portion TB1 and tab portion TB2 formed outside the cell group 11 by arranging the terminal portion TP1. In the following, the tab portion TB1 and the tab portion TB2 are When there is no need to distinguish, the tab portion TB may be simply used.), And the tab portion TB (the tab portion TB1 and the tab portion TB2) is arranged in line symmetry with each other, and the terminal portion TP1 is The tab portions TB (each of the tab portion TB1 and the tab portion TB2) are arranged point-symmetrically.

  Therefore, the solar cell module 1 includes at least a pair of tab portions TB that are formed outside the cell group 11 and arranged in line symmetry (when the outer periphery of the cell group 11 is a pseudo rectangle, for example, the short side (Y Terminal portions disposed on two tab portions TB1 and TB2 disposed at both ends of the direction) or two tab portions TB (not illustrated) disposed on both ends of the long side (X direction) of the pseudo rectangle. TP1 is arranged point-symmetrically at the tab portion TB1 (and tab portion TB2) (for example, arranged point-symmetrically with respect to the center (symmetric point) of the tab portion TB1. Placed symmetrically with respect to the center of the tab portion TB2). Therefore, when the solar cells PV1 of the plurality of solar cell modules 1 are connected in parallel, the adjacent tab portion TB (for example, another solar cell module relative to the tab portion TB1 of one solar cell module 1). Since the tab portion TB2 of Lumpur 1. The terminal portion TP1 each other see Figure 2A) can be easily connected, it is possible to connect the solar cells PV1 in parallel without providing any special wiring area for parallel connection.

  The connection between the connection point CP1 and the terminal part TP1 is performed by connecting the lead wiring WL extended from the connection point CP1 to the terminal part TP1. The lead wiring WL is formed by appropriately patterning the wiring board 20. The wiring board 20 is preferably formed of a flexible film. By giving flexibility, the influence on the photovoltaic cell PV1 can be suppressed, and the connection between the connection points CP1 is facilitated.

  Note that the pseudo rectangle is a state in which, for example, four corners of the rectangle are hypotenuses to form, for example, a pseudo octagon. Further, the state in which the pair of tab portions TB are arranged in line symmetry means that when the outer periphery of the cell group 11 is, for example, a pseudo rectangle, both ends of one side (short side or long side) of the pseudo rectangle are pseudo rectangles. In FIG. For example, since the tab portion TB1 and the tab portion TB2 are disposed at both ends of the short side, the tab portion TB1 and the tab portion TB2 are arranged in line symmetry in the solar cell module 1 (the outer periphery of the cell group 11). It has become.

  The terminal portion TP1 being arranged point-symmetrically at the tab portion TB1 (or tab portion TB2) means that the terminal portion TP1 is arranged with the center of the tab portion TB as a symmetrical point. In the present embodiment, since only one terminal portion TP1 is disposed in each tab portion TB, the terminal portion TP1 is disposed in the center of the tab portion TB. The shape of the terminal portion TP1 may be a shape that allows mutual connection. Note that the case where a plurality of terminal portions are arranged in one tab portion TB will be further described in Embodiment 5 (FIG. 5A).

  Since the solar cell module 1 is a module component that can be connected in parallel, the solar cells PV1 included in the plurality of solar cell modules 1 can be easily connected in parallel, and the capacity can be increased with a high yield. Moreover, it becomes possible to select only non-defective products at the stage of the solar cell module 1 including the cell group 11, and it is possible to efficiently form a large-capacity solar cell array 9a (see FIG. 2A) in which a plurality of solar cell modules 1 are arranged. Can be done.

  The solar cell modules 1 are arranged in parallel to each other in one direction (in this embodiment, the Y direction) in which the tab portions TB (tab portions TB1, tab portions TB2) are arranged, and the solar cells PV1 are arranged in parallel. Can be connected (see FIG. 2A). Further, since the terminal portion TP1 is arranged point-symmetrically, the terminal portion TP1 is connected to each other by being rotated 180 degrees and arranged in the direction (X direction) intersecting the Y direction where the tab portion TB is arranged. It is also possible.

  In the solar cell module 1, the cell group 11 includes a pseudo rectangle (pseudo rectangle) in which four corners of a rectangle (in this embodiment, a rectangle having a ratio of a short side to a long side of approximately 1 to 2) are hypotenuses. The tab part TB (tab part TB1, tab part TB2) is arranged at the corner part.

  Therefore, the solar cell module 1 includes a tab portion TB that is paired in either the X direction or the Y direction among the four corners of the pseudo rectangle (in the present embodiment, the two left and right Y directions in the drawing). Since the tab portion TB1 and the tab portion TB2 arranged in the Y direction on the right side are arranged, the solar cell modules 1 are arranged in parallel in the row direction or the column direction (X direction or Y direction) (see FIG. 2A). When this is done, the tab portions TB can be opposed to each other at the corner portions, so that the charging rate of the solar cells PV1 can be improved and the power generation efficiency per arrangement area can be improved without increasing the area for parallel connection. Can do. Note that, as described above, it is also possible to arrange the rotation by 180 degrees.

  In the solar cell module 1, the cell group 11 is mounted on a single wiring board 20, and the tab portion TB is formed by extending the wiring board 20. Therefore, since the solar cell module 1 mounts the cell group 11 on the wiring board 20 and extends the tab portion TB from the wiring board 20, it can ensure the integrity and improve the reliability and workability. Can do.

  The wiring board 20 is preferably a double-sided wiring, and the terminal portion TP1 is preferably formed as a double-sided wiring connected to each other at the tab portion TB. By using double-sided wiring, the solar cell module 1 can easily connect the terminal portions TP1 of the tab portions TB arranged adjacent to each other (see FIG. 2A), thereby improving the workability of parallel connection. Large capacity can be easily implemented.

  In the solar cell module 1, the solar cell PV1 is a pseudo square (pseudo octagon) in which four corners of the square are hypotenuses. Therefore, the solar cell module 1 can improve an area filling rate, productivity, and power generation efficiency using the crystalline solar cell PV1 with high power generation efficiency. As an example of a pseudo square, for example, a pseudo square may be cut out from a circular wafer, and a part of the circumference may be left as the hypotenuse of the corner of the pseudo square.

  In the series circuit (cell group 11) formed by the solar cell module 1, the output terminal MT1 is arranged for the current path MC1 from the outside, the output terminal MT2 is arranged for the current path MC2 to the outside, and the output terminal An internal current path MCm is formed between MT1 and output terminal MT2.

  In addition, the output terminals (output terminal MT1, output terminal MT2) at both ends of the series connection (series circuit) are connected in parallel to another solar cell module 1 that is arranged adjacently with the terminal portion TP1 connected in parallel. (See FIG. 10B). Depending on whether the solar cell modules 1 connected in parallel according to the parallel connection of the terminal portions TP1 are further connected in series or in parallel with other solar cell modules 1, output terminals (output terminal MT1, output terminal MT2) ) Is set as appropriate.

  Further, the output terminal MT1 and the output terminal MT2 can be arranged on the tab portion TB in the same manner as the terminal portion TP1. Since the connection mode of the output terminals (output terminal MT1, output terminal MT2) is set as appropriate, description thereof will be omitted as appropriate in the following embodiments.

  According to the solar cell module 1, when the solar cells PV1 arranged in the same series stage of the series circuit (cell group 11) are connected in parallel to each other, the detour route by the parallel connection (in addition to the current path MCm by the series connection) (Current path by the lead wiring WL) is formed (see FIG. 10B), it is possible to suppress the influence of the shade on the solar cells PV1 arranged in the same series stage and to prevent the output from being lowered due to the shade. it can. In addition, the effect of the detour route by parallel connection will be described in more detail in Embodiment 10 (FIGS. 10A and 10B).

  In addition, the solar cell PV1 mounted on the wiring board 20 has, for example, a first polarity electrode (for example, a p-type electrode) and a second polarity electrode (for example, an n-type electrode) on the back surface that is the surface opposite to the light receiving surface. Although it is preferable that it is a back electrode type in which is formed, it is not limited to this. The solar cell PV1 is mounted on the wiring pattern of the wiring substrate 20 that is appropriately patterned.

<Embodiment 2>
A solar cell module array 9a according to the present embodiment will be described with reference to FIGS. 2A and 2B. The solar cell module array 9a is configured by connecting a plurality of solar cell modules 1 according to Embodiment 1 (parallel connection). Therefore, the connected state (connected state) will be mainly described with reference to symbols.

  FIG. 2A is a schematic plan view schematically showing a planar shape of solar cell module array 9a according to Embodiment 2 of the present invention.

  FIG. 2B is a schematic circuit diagram schematically showing a connection configuration of the solar cell module array 9a shown in FIG. 2A.

  In order to facilitate understanding, a case where two solar cell modules 1 are connected in parallel will be described as an example. In the solar cell module array 9a according to the present embodiment, two solar cell modules 1 are arranged in parallel in the Y direction (column direction) to form two rows. Four solar cells PV1 are arranged in two rows (two rows in the Y direction) and two columns (two columns in the X direction). That is, it is set as the connection structure of 2 series 2 parallel.

  In FIG. 2A, the solar cell modules 1 arranged in parallel (hereinafter sometimes referred to as “solar cell module 1 f and solar cell module 1 s” as appropriate) are illustrated separately, but are adjacent to each other. The solar cell modules 1 are arranged so as to be spread over each other, and are in a state in which no gap is generated between them. Further, the tab portion TB1 of the solar cell module 1s and the tab portion TB2 of the solar cell module 1f are arranged to face each other.

  Since the tab portion TB1 of the solar cell module 1f and the tab portion TB2 of the solar cell module 1s are arranged symmetrically, when the two solar cell modules 1 are arranged in parallel, the tab portions TB1 overlap each other.

  In addition, since the terminal portion TP1 is arranged point-symmetrically with respect to the tab portion TB, when the tab portion TB2 of the solar cell module 1f and the tab portion TB1 of the solar cell module 1s overlap, The terminal part TP1 arranged in the tab part TB2 and the terminal part TP1 arranged in the tab part TB1 of the solar cell module 1s overlap in a self-aligning manner.

  Therefore, the terminal part TP1 arranged in the tab part TB2 of the solar cell module 1f and the terminal part TP1 arranged in the tab part TB1 of the solar cell module 1s are easily connected via the connecting member BP, and the solar cell module 1f. The solar battery cell PV1 and the solar battery cell PV1 of the solar battery module 1s are connected in parallel to each other via a connection point CP1, a lead wiring WL, a terminal portion TP1, and a connection member BP.

  In addition, it is preferable that the terminal part TP1 is a double-sided wiring that conducts between both sides of the tab part TB. With this configuration, the overlapped terminal portions TP1 are easily connected to each other with solder or the like (connecting member BP) filled in a through hole penetrating the double-sided wiring.

  The connecting member BP is not limited to the solder filling the through hole, and may be any member as long as the terminal portions TP1 of the opposing tab portions TB can be connected to each other. In addition, the wiring to the output terminal MT1 and the output terminal MT2 may be appropriately wired as necessary (series wiring, parallel wiring).

  In the solar cell module array 9a, by arranging the solar cell modules 1 in parallel in the Y direction, the number of solar cell modules 1 connected in parallel can be increased to further increase the capacity. Moreover, although the expansion | deployment to the Y direction was illustrated, it is also possible to set it as the form which rotates one solar cell module 1 180 degree | times with respect to the other, and connects each other in the X direction.

  The solar cell module array 9a includes two (a pair of) tab portions TB (tab portions TB1, tabs) connected to one connection point CP1 of the cell group 11 in which two solar cells PV1 are arranged in series. The solar cell module 1 that is individually disposed in each of the portions TB2) and in which the terminal portions TP1 are disposed point-symmetrically in each tab portion TB is used as a minimum unit.

  Therefore, not only parallel connection (parallel arrangement) in the vertical direction (Y direction) in a plan view but also parallel connection when rotated 180 degrees is possible.

<Embodiment 3>
With reference to FIG. 3A and FIG. 3B, the solar cell module 3 which concerns on this Embodiment is demonstrated. The basic configuration of the solar cell module 3 is the same as that of the solar cell module 1 according to Embodiment 1, and the solar cell module 1 includes a pair of tab portions TB1 and tab portions TB2, whereas the solar cell module 3 Are different in that they further include another pair of tab portions TB3 and TB4. Therefore, the description will be made mainly with reference to the difference in the tab portion TB with reference to the reference numerals.

  FIG. 3A is a schematic plan view schematically showing a planar shape of solar cell module 3 according to Embodiment 3 of the present invention.

  FIG. 3B is a schematic circuit diagram schematically showing the connection configuration of the solar cell module 3 shown in FIG. 3A.

  In solar cell module 3 according to the present embodiment, tab portion TB (hereinafter, tab portion TB1, tab portion TB2, tab portion TB3, tab portion TB4 is simply referred to as tab portion TB when it is not necessary to distinguish between them. ) May be two pairs. Further, the terminal portion TP (terminal portion TP1) is arranged point-symmetrically at the tab portion TB.

  In other words, the tab portion TB has two pairs (a set of the tab portion TB1 and the tab portion TB2 and a set of the tab portion TB3 and the tab portion TB4. Alternatively, a set of the tab portion TB1 and the tab portion TB3, and the tab portion TB2 and the tab portion. TB4), and the pairs are arranged at different positions. Accordingly, in the solar cell module 3, the terminal portions TP1 are led out in four different directions (four locations) according to the arrangement of the tab portions TB, and when arranged side by side, the terminal portions TP1 connected in parallel increase. The degree of freedom in parallel connection, workability, and reliability can be improved.

  According to the solar cell module 3, it can arrange | position in parallel in 2 directions (X direction, Y direction) by which the tab part TB is arrange | positioned, and can connect in parallel (refer FIG. 4A). Moreover, it is also possible to arrange by rotating 180 degrees (see FIG. 7A).

<Embodiment 4>
With reference to FIG. 4A and FIG. 4B, the solar cell module array 9b which concerns on this Embodiment is demonstrated. The solar cell module array 9b is configured by connecting a plurality of solar cell modules 3 according to Embodiment 3 (parallel connection). The basic configuration of the solar cell module array 9b according to the present embodiment is the same as that of the solar cell module array 9a according to the second embodiment. Therefore, the connected state (connected state) will be mainly described with reference to symbols.

  FIG. 4A is a schematic plan view schematically showing a planar shape of solar cell module array 9b according to Embodiment 4 of the present invention.

  FIG. 4B is a schematic circuit diagram schematically showing the connection configuration of the solar cell module array 9b shown in FIG. 4A.

  In the solar cell module array 9b according to the present embodiment, a plurality of solar cell modules 3 are arranged in parallel like the solar cell module array 9a according to the second embodiment. Since the tab portions TB are arranged at four locations, it is possible to improve the expandability, reliability, and workability for parallel connection. In addition, the fundamental effect of the solar cell module array 9b which concerns on this Embodiment is the same as the effect of the solar cell module array 9a which concerns on Embodiment 2. FIG.

  In the solar cell module array 9b, two solar cell modules 3 are arranged in parallel in the Y direction (column direction) to form two rows. Four solar cells PV1 are arranged in two rows (two rows in the Y direction) and two columns (two columns in the X direction). That is, it is set as the connection structure of 2 series 2 parallel.

  In FIG. 4A, the solar cell modules 3 arranged in parallel (hereinafter sometimes referred to as “solar cell module 3 f and solar cell module 3 s” as appropriate) are illustrated separately, but are adjacent to each other. The solar cell modules 3 are arranged so as to be spread over each other, and are in a state in which no gap is generated between them. Moreover, the tab part TB2 of the solar cell module 3f and the tab part TB1 of the solar cell module 3s are arranged to face each other, and the tab part TB4 of the solar cell module 3f and the tab part TB3 of the solar cell module 3s are mutually connected. Opposed to each other.

  Since the tab portion TB2 of the solar cell module 3f and the tab portion TB1 of the solar cell module 3s are arranged symmetrically, when the two solar cell modules 3 are arranged in parallel, the tab portions TB2 overlap each other. Similarly, since the tab portion TB4 of the solar cell module 3f and the tab portion TB3 of the solar cell module 3s are arranged symmetrically, when the two solar cell modules 3 are arranged in parallel, they overlap each other. It becomes.

  Further, since the terminal portion TP1 is arranged point-symmetrically with respect to the tab portion TB, when the tab portion TB2 of the solar cell module 3f and the tab portion TB1 of the solar cell module 3s are overlapped, the solar cell module 3f The terminal part TP1 arranged in the tab part TB2 and the terminal part TP1 arranged in the tab part TB1 of the solar cell module 3s overlap in a self-aligning manner.

  Similarly, when the tab portion TB4 of the solar cell module 3f and the tab portion TB3 of the solar cell module 3s overlap, the terminal portion TP1 disposed on the tab portion TB4 of the solar cell module 3f and the tab portion TB3 of the solar cell module 3s. It overlaps with the terminal part TP1 arranged in self-alignment.

  Therefore, the terminal part TP1 arranged in the tab part TB2 of the solar cell module 3f and the terminal part TP1 arranged in the tab part TB1 of the solar cell module 3s are easily connected via the connecting member BP. The same applies to the tab portion TB4 (terminal portion TP1) of the solar cell module 3f and the tab portion TB3 (terminal portion TP1) of the solar cell module 3s.

  That is, the solar battery cell PV1 of the solar battery module 3f and the solar battery cell PV1 of the solar battery module 3s are connected in parallel to each other via the connection point CP1, the lead wiring WL, the terminal portion TP1, and the connection member BP. .

  The terminal portion TP1 is preferably a double-sided wiring that conducts between both surfaces of the tab portion TB. With this configuration, the overlapped terminal portions TP1 are easily connected to each other with solder or the like (connecting member BP) filled in a through hole penetrating the double-sided wiring.

  The connecting member BP is not limited to the solder filling the through hole, and may be any member as long as the terminal portions TP1 of the opposing tab portions TB can be connected to each other. In addition, the wiring to the output terminal MT1 and the output terminal MT2 may be appropriately wired as necessary (series wiring, parallel wiring).

  In the solar cell module array 9b, by arranging the solar cell modules 1 in parallel in the Y direction, the number of solar cell modules 1 connected in parallel can be increased to further increase the capacity. Moreover, although the expansion | deployment to the Y direction was illustrated, it is also possible to set it as the form which rotates one solar cell module 1 180 degree | times with respect to the other, and connects each other in the X direction.

  As described above, in the solar cell module array 9b, in addition to the connection between the tab portion TB1 and the tab portion TB2, the connection between the tab portion TB3 and the tab portion TB4 is provided by the connecting member BP.

  That is, in addition to the paired direction (Y direction) formed by the tab part TB1 and the tab part TB2, a parallel connection is performed in the paired direction (Y direction) formed by another tab part TB3 and the tab part TB4. ing. Therefore, the reliability and workability of parallel connection can be improved.

  The solar cell module array 9b includes four (two pairs) tab portions TB (tab portions TB1 to TB1) connected to one connection point CP1 included in the cell group 11 in which two solar cells PV1 are in series. Each of the tab portions TB4) is individually arranged, and the solar cell module 3 in which the terminal portions TP1 are arranged point-symmetrically in each tab portion TB is used as a minimum unit.

  Therefore, not only parallel connection (parallel arrangement) in the vertical direction (Y direction) in a plan view but also parallel connection when rotated 180 degrees is possible. That is, the arrangement of the solar cell modules 3 extended in the Y direction (parallel connection) and the arrangement of the solar cell modules 3 extended in the X direction (parallel connection) are possible, and a large-capacity solar cell module that suppresses the influence of the shade. An array 9b can be realized.

<Embodiment 5>
With reference to FIG. 5A and FIG. 5B, the solar cell module 6 which concerns on this Embodiment is demonstrated. The basic configuration of the solar cell module 6 is the same as that of the solar cell module 1 according to the first embodiment and the solar cell module 3 according to the third embodiment. Will be described.

  FIG. 5A is a schematic plan view schematically showing a planar shape of solar cell module 6 according to Embodiment 5 of the present invention.

  FIG. 5B is a schematic circuit diagram schematically showing the connection configuration of the solar cell module 6 shown in FIG. 5A.

  In the solar cell module 6 according to the present embodiment, three solar cells PV1 are arranged in series, and the connection point CP1 and the connection point CP2 are connected to each tab portion TB (tab portion TB1, tab portion) via the lead wiring WL. TB2, tab part TB3, tab part TB4), and terminal part TP1 and terminal part TP2 are arranged in tab part TB.

  That is, the connection between the connection point CP1 and the terminal part TP1 is performed by connecting the lead wiring WL extended from the connection point CP1 to the terminal part TP1, and the connection between the connection point CP2 and the terminal part TP2 is performed at the connection point CP2. The lead wiring WL extended from is connected to the terminal portion TP2 and applied.

  In the solar cell module 6, a plurality of (for example, three) solar cells PV1 have two connection points CP (for example, two connection points CP1 and CP2. In the following, it is necessary to particularly distinguish the connection points CP1 and CP2). If not, the cell group 12 may be simply connected to each other in series via the connection point CP), the terminal portion TP1 and the terminal portion TP2 connected to the connection point CP1 and the connection point CP2, respectively, and the terminal A portion TP (a terminal portion TP1 and a terminal portion TP2. In the following description, the terminal portion TP1 and the terminal portion TP2 may be simply referred to as a terminal portion TP when there is no need to distinguish between them). And at least a pair of tab portions TB (one set of tab portion TB1 and tab portion TB2 or one set of tab portion TB3 and tab portion TB4) formed on the outside. Is Yes disposed symmetrically to each other, the terminal portion TP (terminal portion TP1 and the terminal portion TP2) is arranged in point symmetry with each tab portion TB (tab portion TB1~ tab portion TB4).

  Therefore, the solar cell module 6 includes at least a pair of tab portions TB formed outside the cell group 12 and arranged in line symmetry (when the outer periphery of the cell group 12 is a pseudo rectangle, for example, the short side (Y The combination of the two tab portions TB1 and TB2 arranged at both ends of the direction, or the combination of the tab portion TB3 and the tab portion TB4, and 2 arranged at both ends of the long side (X direction) of the pseudo rectangle. The terminal portion TP1 and the terminal portion TP2 arranged in the tab portion TB1 and the tab portion TB3, or the combination of the tab portion TB2 and the tab portion TB4) are arranged point-symmetrically in the tab portion TB (the center of the tab portion TB). (Symmetry point) is arranged point-symmetrically), when solar cells PV1 of a plurality of solar cell modules 6 are connected in parallel, Tab portion TB (for example, tab portion TB2 of another solar cell module 6 with respect to tab portion TB1 of one solar cell module 6. Other solar cell module 6 with respect to tab portion TB3 of one solar cell module 6) Since the terminal portions TP of the tab portion TB4 (see FIG. 6A) (terminal portions TP1 and terminal portions TP2) can be easily connected to each other, the solar cell PV1 can be formed without providing a special wiring region for parallel connection. Can be connected in parallel.

  In the solar cell module 6, the tab portion TB has two pairs (a set of tab portion TB1 and tab portion TB2 and a set of tab portion TB3 and tab portion TB4. Alternatively, a set of tab portion TB1 and tab portion TB3 and a tab portion. TB2 and tab portion TB4), and the pairs are arranged at different positions. Therefore, when the solar cell module 6 is arranged side by side, the terminal portions TP (each of the terminal portions TP1 and TP2) are led out in four different directions (four locations) according to the arrangement of the tab portions TB. Since the terminal parts TP (terminal part TP1 and terminal part TP2) connected in parallel increase, the freedom of parallel connection, workability, and reliability can be improved.

  In the solar cell module 6, there are a plurality of connection points CP (for example, connection points CP1 and CP2), and the terminal portions TP (the terminal portions TP1 corresponding to the connection points CP1 and the connection points CP1 and the connection points CP1) are connected to the same number of connection points CP. Each of the terminal portions TP2) corresponding to the point CP2 is a pair (two terminal portions TP1 and two terminal portions TP2) connected to each other in the tab portion TB, and each pair is point-symmetrically arranged. Yes.

  Therefore, the solar cell module 6 includes a plurality of terminal portions TP (two locations of the terminal portion TP1 and the terminal portion TP2) having the same number as the plurality of connection points CP (two locations of the connection point CP1 and the connection point CP2). A pair of terminals connected to each other in each of the TBs (the tab part TB1, the tab part TB2, the tab part TB3, and the tab part TB4) (in each tab part TB, the terminal part TP1 corresponding to one connection point CP1 is connected to each other 2 Since two terminal portions TP2 corresponding to one connection point CP2 are connected to each other and are connected in a point-symmetric manner, it is easy to connect in parallel by rotating 180 degrees. Even in the case of including point CP (connection point CP1 and connection point CP2, a plurality of terminal portions TP (terminal portion TP1 and terminal portion TP2) arranged corresponding to a plurality of connection points CP), It can be improved Yoshido.

  In each tab part TB, the terminal part TP1 and the terminal part TP2 are arranged point-symmetrically in pairs (two). The terminal part TP1 and the terminal part TP2 are connected to each other in each tab part TB. The two terminal portions TP1 and the two terminal portions TP2 are arranged in a point-symmetric manner with respect to the center (symmetric point) of the tab portion TB.

  Therefore, the terminal portions TP arranged in each tab portion TB are, for example, in the clockwise direction (counterclockwise direction), the terminal portion TP1, the terminal portion TP2, the second terminal portion TP1, and the second terminal. The parts TP2 are arranged in order, and the terminal part TP forms rectangular vertices (or points divided into four on concentric circles) centered on a symmetry point (center of the tab part TB). The rectangle is preferably a square or a rectangle, but the terminal portions TP need only be arranged symmetrically and are not limited thereto. Moreover, the arrangement state of the terminal part TP becomes the same in each tab part TB by planar view.

  The cell group 12 has an outer periphery of a pseudo rectangle (pseudo rectangle) in which four corners of a rectangle (in the present embodiment, a rectangle having a ratio of a short side to a long side of approximately 1 to 3) is a hypotenuse, The tab portion TB (tab portion TB1 to tab portion TB4) is disposed at each corner portion. Therefore, since the solar cell module 6 arranges the tab portions TB at the four corners of the pseudo rectangle, when the solar cell modules 6 are arranged in a matrix, the tab portions TB can be opposed to each other at the corners. Therefore, without increasing the area for parallel connection, the filling rate of the solar cells PV1 can be improved, and the power generation efficiency per arrangement area can be improved. Note that, as described above, the solar cell module 6 can also be arranged by being rotated 180 degrees.

  As described above, the solar cell module 6 according to the present embodiment is exemplified as a connection configuration of three series (two connection points), but the configuration of the cell group 12 is not limited to this, and the number of series is further increased. It is also possible to do. For example, various modifications may be made such as arranging the three connection points CP <b> 1 to CP <b> 3 by dividing the two into six series. That is, the solar cell module 6 can be specified as follows, for example.

  The solar cell module 6 includes at least three solar cells PV1 as the cell group 12, and the tab portion TB includes at least two terminal portions TP.

  Therefore, since the solar cell module 6 has at least three solar cells PV1 in series in the cell group 12, the voltage can be further increased, and the terminal portion TP in the tab portion TB is at least 2 in length. Since each of the at least three solar cells PV1 can be connected in parallel, the versatility can be further improved by expanding the form of parallel connection.

<Embodiment 6>
A solar cell module array 9c according to the present embodiment will be described with reference to FIGS. 6A and 6B. The solar cell module array 9c is configured by connecting a plurality of solar cell modules 6 according to Embodiment 5 (parallel connection). The basic configuration of the solar cell module array 9c according to the present embodiment is the same as that of the solar cell module array 9a according to the second embodiment and the solar cell module array 9b according to the fourth embodiment. Therefore, the connected state (connected state) will be mainly described with reference to symbols.

  FIG. 6A is a schematic plan view schematically showing a planar shape of solar cell module array 9c according to Embodiment 6 of the present invention.

  6B is a schematic circuit diagram schematically showing a connection configuration of the solar cell module array 9c shown in FIG. 6A.

  An example in which two solar cell modules 6 are connected in parallel will be described. In the solar cell module array 9c according to the present embodiment, two solar cell modules 6 are arranged in parallel in the Y direction (column direction) to form two rows. Six solar cells PV1 are arranged in 2 rows (2 rows in the Y direction) and 3 columns (3 columns in the X direction). That is, it is set as the connection structure of 3 series 2 parallel.

  In FIG. 6A, the solar cell modules 6 arranged in parallel (hereinafter sometimes referred to as the solar cell module 6f and the solar cell module 6s as appropriate) are described separately, but are adjacent to each other. The solar cell modules 6 are arranged in a mutually spread state so that no gap is generated between them. Further, the tab portion TB2 of the solar cell module 6f and the tab portion TB1 of the solar cell module 6s are arranged to face each other, and the tab portion TB4 of the solar cell module 6f and the tab portion TB3 of the solar cell module 6s are mutually connected. Opposed to each other.

  Since the tab part TB2 of the solar cell module 6f and the tab part TB1 of the solar cell module 6s are arranged symmetrically, when the two solar cell modules 6 are arranged in parallel, they are in a state of overlapping each other. Similarly, since the tab portion TB4 of the solar cell module 6f and the tab portion TB3 of the solar cell module 6s are arranged symmetrically, when the two solar cell modules 6 are arranged in parallel, they overlap each other. It becomes.

  Further, since the two terminal portions TP1 and the two terminal portions TP2 are arranged point-symmetrically with respect to the tab portion TB, the tab portion TB2 of the solar cell module 6f and the tab portion TB1 of the solar cell module 6s. Are overlapped in a self-aligned manner with the terminal portion TP1 disposed in the tab portion TB2 of the solar cell module 6f and the terminal portion TP1 disposed in the tab portion TB1 of the solar cell module 6s. The terminal part TP2 arranged in the tab part TB2 and the terminal part TP2 arranged in the tab part TB1 of the solar cell module 6s overlap in a self-aligning manner. The same applies to the tab portion TB4 of the solar cell module 6f and the tab portion TB3 of the solar cell module 6s.

  Therefore, the terminal part TP1 arranged in the tab part TB2 of the solar cell module 6f and the terminal part TP1 arranged in the tab part TB1 of the solar cell module 6s are easily connected via the connecting member BP, and the solar cell module 6f. The terminal part TP2 arranged in the tab part TB2 and the terminal part TP2 arranged in the tab part TB1 of the solar cell module 6s are easily connected via the connecting member BP. The same applies to the terminal portion TP disposed in the tab portion TB4 of the solar cell module 6f and the tab portion TB3 of the solar cell module 6s.

  That is, the solar cell PV1 of the solar cell module 6f and the solar cell PV1 of the solar cell module 6s are connected to the connection point CP1 (connection point CP2), the lead wiring WL, the terminal portion TP1 (terminal portion TP2), and the connecting member BP. They are connected in parallel to each other via a path.

  In addition, it is preferable that the terminal part TP is a double-sided wiring which mutually conducts between both surfaces of the tab part TB. With this configuration, the overlapped terminal portions TP1 are easily connected to each other with solder or the like (connecting member BP) filled in a through hole penetrating the double-sided wiring.

  In the solar cell module array 9c, by arranging the solar cell modules 1 in parallel in the Y direction, the number of solar cell modules 6 connected in parallel can be increased to further increase the capacity. Moreover, although the expansion | deployment to the Y direction was illustrated, it is also possible to set it as the form which rotates one solar cell module 6 180 degree | times with respect to the other, and connects mutually (refer FIG. 8A).

  The solar cell module array 9c includes two terminal portions TP (terminal portions) respectively connected to two connection points CP (connection point CP1 and connection point CP2) included in the cell group 12 in which three solar cells PV1 are arranged in series. TP1, terminal portion TP2) are arranged in four (two pairs) tab portions TB (tab portion TB1 to tab portion TB4), and the respective solar cell modules 6 are arranged in pairs in each tab portion TB. Is the smallest unit.

  Therefore, not only parallel connection (parallel arrangement) in the left and right and up and down directions in a plan view but also parallel connection when rotated 180 degrees is possible.

<Embodiment 7>
A solar cell module array 9d according to the present embodiment will be described with reference to FIGS. 7A and 7B. The solar cell module array 9d is a modification of the solar cell module array 9b according to Embodiment 4, and is a solar cell module 3 (solar cell module 3f and solar cell module 3s. In the following description, the solar cell module 3f and the solar cell are appropriately used. Module 3s) may be connected in parallel in a state of being arranged in the opposite direction (a state rotated by 180 degrees). The basic configuration of solar cell module array 9d is the same as that of solar cell module array 9b according to Embodiment 4. Therefore, the connected state (connected state) will be mainly described with reference to symbols.

  FIG. 7A is a schematic plan view schematically showing a planar shape of solar cell module array 9d according to Embodiment 7 of the present invention.

  FIG. 7B is a schematic circuit diagram schematically showing a connection configuration of the solar cell module array 9d shown in FIG. 7A.

  Similar to the solar cell module array 9b according to the fourth embodiment, the solar cell module array 9d according to the present embodiment is formed by arranging a plurality of solar cell modules 3 connected in parallel. Since the tab portions TB are arranged at four locations, it is possible to improve the reliability and workability for parallel connection. In addition, the effect of the solar cell module array 9d which concerns on this Embodiment is the same as the effect of the solar cell module array 9 which concerns on Embodiment 4. FIG.

  In the solar cell module array 9d, the solar cell module 3f and the solar cell module 3s are formed with current paths MCm in opposite directions. That is, the solar cell modules 3 are connected in parallel in a state where they are arranged in opposite directions.

  Therefore, when the two solar cell modules 3 are arranged side by side in the opposite direction, for example, the tab portion TB of the solar cell module 3f has a tab portion TB1, a tab portion TB2, and a tab portion in the clockwise direction from the right shoulder. The tab portion TB of the solar cell module 3s is arranged in the order of the tab portion TB4, the tab portion TB3, the tab portion TB1, and the tab portion TB2 in the clockwise direction from the right shoulder. .

  That is, the tab portion TB4 of the solar cell module 3s is adjacent (opposed) to the tab portion TB2 of the solar cell module 3f, and the tab portion TB2 of the solar cell module 3s is adjacent to the tab portion TB4 of the solar cell module 3f. Adjacent (opposite).

  Moreover, the tab part TB (tab part TB1-tab part TB4) is arrange | positioned mutually symmetrically as the solar cell module 1 which concerns on Embodiment 1, and the solar cell module 3 which concerns on Embodiment 3 were demonstrated. The terminal part TP (terminal part TP1) is arranged point-symmetrically at the tab part TB.

  Accordingly, the tab portion TB2 of the solar cell module 3f and the tab portion TB4 of the solar cell module 3s are aligned in a self-aligning manner, and the terminal portion TP1 of the tab portion TB2 of the solar cell module 3f and the solar cell module 3s are aligned. The terminal portion TP1 of the tab portion TB4 is aligned in a self-aligned manner and connected via a connecting member BP. Similarly, the terminal portion TP1 of the tab portion TB4 of the solar cell module 3f and the terminal portion TP1 of the tab portion TB2 of the solar cell module 3s are aligned and connected via the connecting member BP.

  When the current path MC1 and the current path MC2 are considered based on the solar cell module 3f, in the solar cell module 3s, there is an appropriate current path MCr from the output terminal MT1 of the solar cell module 3f to the output terminal MT1 of the solar cell module 3s. An appropriate current path MCr is set from the output terminal MT2 of the solar cell module 3s to the output terminal MT2 of the solar cell module 3f.

  That is, since the solar cell modules 3 having the current paths MCm that are opposite to each other can be connected in parallel to each other in a state of being arranged in parallel, a large-capacity solar cell module array that suppresses the influence of the shade 9 can be realized.

<Eighth embodiment>
A solar cell module array 9e according to the present embodiment will be described with reference to FIGS. 8A and 8B. The solar cell module array 9e is a modification of the solar cell module array 9c according to Embodiment 6, and includes a solar cell module 6 (a solar cell module 6f and a solar cell module 6s. In the following description, the solar cell module 6f and the solar cell are appropriately used. Module 6s) may be connected in parallel in a state of being arranged in the reverse direction (a state rotated by 180 degrees). The basic configuration of the solar cell module array 9e according to the present embodiment is the same as that of the solar cell module array 9c according to the sixth embodiment. Therefore, the connected state (connected state) will be mainly described with reference to symbols.

  FIG. 8A is a schematic plan view schematically showing a planar shape of solar cell module array 9e according to Embodiment 8 of the present invention.

  FIG. 8B is a schematic circuit diagram schematically showing a connection configuration of the solar cell module array 9e shown in FIG. 8A.

  Similarly to the solar cell module array 9c according to the sixth embodiment, a plurality of solar cell modules 6 are arranged in parallel to form the solar cell module array 9e according to the present embodiment. Since the tab portions TB are arranged at four locations, it is possible to improve the reliability and workability for parallel connection. In addition, the effect of the solar cell module array 9e which concerns on this Embodiment is the same as the effect of the solar cell module array 9c which concerns on Embodiment 6. FIG.

  In the solar cell module array 9e, the solar cell module 6f and the solar cell module 6s have current paths MCm formed in opposite directions. That is, the solar cell modules 6 are connected in parallel in a state where they are arranged in opposite directions.

  Accordingly, when the two solar cell modules 6 are arranged in parallel in the opposite directions, for example, the tab portion TB of the solar cell module 6f has a tab portion TB1, a tab portion TB2, a tab in the clockwise direction from the right shoulder. The tab TB in the solar cell module 6s is arranged in the order of the tab TB4, the tab TB3, the tab TB1, and the tab TB2 in the clockwise direction from the right shoulder. Is done.

  That is, the tab portion TB4 of the solar cell module 6s is adjacent (opposed) to the tab portion TB2 of the solar cell module 6f, and the tab portion TB2 of the solar cell module 6s is adjacent to the tab portion TB4 of the solar cell module 6f. Adjacent (opposite).

  Moreover, the tab part TB (tab part TB1-tab part TB4) is mutually arrange | positioned line-symmetrically as the solar cell module 1 which concerns on Embodiment 1, and the solar cell module 6 which concerns on Embodiment 5 were demonstrated. The terminal portions TP (terminal portions TP1 and TP2) are arranged point-symmetrically at each tab portion TB.

  Accordingly, the tab portion TB2 of the solar cell module 6f and the tab portion TB4 of the solar cell module 6s are aligned in a self-aligning manner, and the terminal portion TP1 of the tab portion TB2 of the solar cell module 6f and the solar cell module 6s are aligned. The terminal portion TP1 of the tab portion TB4 is aligned in a self-aligned manner and is easily connected via the connecting member BP. The same applies to the terminal portion TP2 of the tab portion TB2 of the solar cell module 6f and the terminal portion TP2 of the tab portion TB4 of the solar cell module 6s. The same applies to the terminal portions TP disposed on the tab portion TB4 of the solar cell module 6f and the tab portion TB2 of the solar cell module 6s.

  That is, the solar cell PV1 of the solar cell module 6f and the solar cell PV1 of the solar cell module 6s are connected to the connection point CP1 (connection point CP2), the lead wiring WL, the terminal portion TP1 (terminal portion TP2), and the connecting member BP. They are connected in parallel to each other via a path.

  When the current path MC1 and the current path MC2 are considered based on the solar cell module 6f, in the solar cell module 6s, an appropriate current path MCr from the output terminal MT1 of the solar cell module 6f to the output terminal MT1 of the solar cell module 6s. An appropriate current path MCr is set from the output terminal MT2 of the solar cell module 6s to the output terminal MT2 of the solar cell module 6f.

  In other words, since the solar cell modules 6 having the current paths MCm that are opposite to each other can be connected in parallel with each other in parallel, the large-capacity solar cell module array that suppresses the influence of the shadow. 9 can be realized.

<Embodiment 9>
9A to 9E, solar cell module 7 according to the present embodiment, solar cell module array 9f in which solar cell modules 7 are connected in parallel, and a solar cell as a modification of solar cell module 7 The module 8 will be described. The solar cell module 7 and the solar cell module 8 are obtained by arranging four solar cells PV2 in series. Since the basic configuration is the same as that of the first embodiment and the like, the reference numerals are used to mainly describe the different items.

  FIG. 9A is a schematic plan view schematically showing a planar shape of solar cell module 7 according to Embodiment 9 of the present invention.

  In the solar cell module 7 according to the present embodiment, four solar cells PV2 have three connection points CP (connection point CP1, connection point CP2, and connection point CP3. Hereinafter, connection point CP1, connection point CP2, When it is not necessary to distinguish the connection point CP3, the connection point CP may be simply used as the connection point CP. That is, the solar cell module 7 includes the solar cells PV2 arranged in series. Therefore, a connection point CP3 as a connection point between cells is added as compared with the case of three series. Further, the connection between the connection point CP3 and the terminal part TP3 is performed by connecting the lead wiring WL extended from the connection point CP3 to the terminal part TP3, as in the other cases.

  The tab part TB is made into two pairs like the solar cell module 3 according to the third embodiment and the solar cell module 6 according to the fifth embodiment, and four tab parts (tab part TB1 to tab part TB4) are arranged. In addition, each tab portion TB is connected to a terminal portion TP (a terminal portion TP1 connected to the connection point CP1, a connection point CP2) corresponding to the connection point CP (connection point CP1, connection point CP2, connection point CP3). (The terminal portion TP2 and the terminal portion TP3 connected to the connection point CP3. Hereinafter, the terminal portion TP1, the terminal portion TP2, and the terminal portion TP3 may be simply referred to as the terminal portion TP if it is not necessary to distinguish them.) Is arranged. That is, the terminal portion TP3 is formed corresponding to the connection point CP3.

  The terminal part TP (terminal part TP1, terminal part TP2, terminal part TP3) is arranged point-symmetrically at the tab part TB. Further, the number of terminal portions TP (three terminal portions TP1, terminal portion TP2, and terminal portion TP3) equal to the number of connecting points CP (three connecting points CP1, connecting point CP2, and connecting point CP3). Each is a pair (two terminal portions TP1, two terminal portions TP2, two terminal portions TP3) connected to each other in the tab portion TB (each of the terminal portion TP1, the terminal portion TP2, and the terminal portion TP3). The pair is point-symmetrically arranged.

  That is, in the tab part TB, two terminal parts TP1 connected to each other, two terminal parts TP2 connected to each other, and two terminal parts TP3 connected to each other are arranged point-symmetrically. For example, each vertex of the hexagon is formed. Therefore, the terminal portions TP arranged in each tab portion TB are in the counterclockwise direction, the terminal portion TP1, the terminal portion TP2, the terminal portion TP3, the second terminal portion TP1, the second terminal portion TP2, Arranged in the order of the second terminal portion TP3, the terminal portion TP forms hexagonal vertices (or points divided into six on a concentric circle) around the symmetry point (center of the tab portion TB). doing. Although it is preferably a regular hexagon, the terminal portions TP need only be arranged symmetrically and are not limited thereto. Moreover, the arrangement state of the terminal part TP becomes the same in each tab part TB by planar view.

  The solar cell PV2 applied to the solar cell module 7 is formed by dividing the solar cell PV1 (see Embodiment 1 and others) into four parallel parts in the same direction. That is, the solar cell PV2 is formed by dividing a pseudo square (solar cell PV1) in which four corners of the square are hypotenuses. The four solar cells PV <b> 2 are formed in two types, a pseudo rectangle having a hypotenuse and a rectangle having no hypotenuse, and the pseudo rectangular solar cells PV <b> 2 are arranged at both ends of the cell group 13.

  Therefore, the solar cell module 7 can easily and efficiently form a plurality of solar cells PV2 connected in series, and can improve productivity and increase voltage. In addition, although the case of four divisions was illustrated, other division numbers can be used.

  In addition, the basic configuration and operation are the same as those of the other embodiments, and detailed description thereof is omitted.

  FIG. 9B is a schematic plan view schematically showing a planar shape of a solar cell module array 9f formed by connecting the solar cell modules 7 shown in FIG. 9A in parallel. The solar cell PV2 is shown in a reduced size, and the tab portion TB is shown relatively large. In addition, description of the lead wiring WL and the like is omitted as appropriate.

  The solar cell module array 9f according to the present embodiment includes a solar cell module 7 (solar cell module 7f and solar cell module 7s. Hereinafter, the solar cell module 7f and the solar cell module 7s may be appropriately described). They are connected in parallel in a state of being arranged in the reverse direction (a state rotated by 180 degrees).

  Since the two solar cell modules 7 are arranged side by side in the opposite direction, the tab portion TB of the solar cell module 7f has a tab portion TB1, a tab portion TB2, and a tab portion in the clockwise direction from the right shoulder. The tab portion TB in the solar cell module 7s is arranged in the order of the tab portion TB4, the tab portion TB3, the tab portion TB1, and the tab portion TB2 in the clockwise direction from the right shoulder. The

  That is, the tab portion TB4 of the solar cell module 7s is adjacent (opposed) to the tab portion TB2 of the solar cell module 7f, and the tab portion TB2 of the solar cell module 7s is adjacent to the tab portion TB4 of the solar cell module 7f. Adjacent (opposite).

  Moreover, the tab part TB (tab part TB1-tab part TB4) is mutually arrange | positioned line-symmetrically as the solar cell module 1 which concerns on Embodiment 1, and the solar cell module 6 which concerns on Embodiment 5 were demonstrated. The terminal portions TP (terminal portions TP1 to TP3) are arranged point-symmetrically at the tab portion TB.

  Accordingly, the tab portion TB2 of the solar cell module 7f and the tab portion TB4 of the solar cell module 7s are aligned in a self-aligning manner, and the tab portion TB4 of the solar cell module 7f and the tab portion TB2 of the solar cell module 7s are Self-aligned alignment.

  Further, the terminal part TP of the tab part TB2 of the solar cell module 7f and the terminal part TP of the tab part TB4 of the solar cell module 7s are aligned in a self-aligned manner and connected via the connecting member BP. The same applies to the terminal portion TP of the tab portion TB4 of the solar cell module 7f and the terminal portion TP of the tab portion TB2 of the solar cell module 7s.

  When the current path MC1 and the current path MC2 are considered based on the solar cell module 7f, in the solar cell module 7s, an appropriate current path MCr from the output terminal MT1 of the solar cell module 7f to the output terminal MT1 of the solar cell module 7s. An appropriate current path MCr is set from the output terminal MT2 of the solar cell module 7s to the output terminal MT2 of the solar cell module 7f.

  That is, since the solar cell modules 7 having the current paths MCm in opposite directions can be connected in parallel with each other in a parallel arrangement state, a large-capacity solar cell module array in which the influence of the shade is suppressed. 9f can be realized.

  The solar cell module array 9f includes three terminal portions TP (terminal portions) respectively connected to three connection points CP (connection points CP1 to CP3) included in the cell group 13 in which four solar cells PV2 are arranged in series. A solar cell module in which TP1 to terminal portion TP3) are arranged in each of four (two pairs) tab portions TB (tab portion TB1 to tab portion TB4), and each terminal portion TP is arranged as a pair in each tab portion TB. 7 is the minimum unit.

  Therefore, not only parallel connection (parallel arrangement) in the left and right and up and down directions in a plan view but also parallel connection when rotated 180 degrees is possible.

  FIG. 9C is a schematic plan view schematically showing a modified example of the arrangement of the terminal portions TP in the tab portion TB of the solar cell module 7 shown in FIG. 9A.

  9A illustrates the case where the terminal portion TP forms hexagonal vertices (or points divided into six on a concentric circle) centered on the symmetry point (center of the tab portion TB). It is also possible to arrange the part TP1, the terminal part TP2, and the terminal part TP3 on a straight line.

  That is, on the straight line having the symmetry point as the center, the terminal portion TP1, the terminal portion TP2, the terminal portion TP3, the second terminal portion TP3, the second terminal portion TP2, and the second terminal portion TP1 from one end. When arranged in order, each of the terminal portions TP is a pair connected to each other, and the pair of points is symmetrical with respect to each pair.

  FIG. 9D is a schematic plan view schematically showing a planar shape of the solar cell module 8 obtained by modifying the shape of the terminal portion TP of the solar cell module 7 shown in FIG. 9A.

  FIG. 9E is an enlarged plan view showing the terminal portion TP of the solar cell module 8 shown in FIG. 9D in an enlarged manner.

  Since the basic configuration of the solar cell module 8 is the same as that of the solar cell module 7, different items will be mainly described.

  The terminal part TP provided in the solar cell module 8 is specifically a terminal part TP1, a terminal part TP2, and a terminal part TP3 corresponding to the connection point CP (connection point CP1, connection point CP2, connection point CP3). The terminal part TP1, the terminal part TP2, and the terminal part TP3 are ring-shaped concentric rings with the center of the tab part TB as the center point, and are arranged point-symmetrically.

  That is, since the terminal part TP (terminal part TP1, terminal part TP2, terminal part TP3) is annular (concentric ring), the tab part TB is arranged point-symmetrically in any direction. Therefore, the tab portion TB1 to the tab portion TB4 can be continuously connected to the left, right, up and down.

  Note that the terminal portion TP3 (innermost concentric ring) can be circular instead of ring-shaped. That is, in the case of a circular shape, the center of the circle is directly a symmetric point.

  The other configuration is the same as that of the solar cell module 7 shown in FIG. 9A and operates in the same manner as the solar cell module 7, and thus the description thereof is omitted. As in the other embodiments, the number of concentric rings can be adjusted as appropriate according to the connection point CP.

<Embodiment 10>
With reference to FIG. 10A and FIG. 10B, the effect as a shadow countermeasure by parallel connection at the time of using the solar cell module array 9f which concerns on Embodiment 9 is demonstrated.

  FIG. 10A is a schematic plan view schematically showing a planar state when the shade SHD falls on the solar cell module array 9f (solar cell module 7) shown in FIG. 9B.

  FIG. 10B is a schematic circuit diagram schematically showing a circuit state due to a shadow on the solar cell module array 9f shown in FIG. 10A.

  The shade caused by the positional relationship between the sunlight and the light shielding object usually occupies a certain area and often has a certain directionality. Therefore, in the present embodiment, the solar battery cell PV2 in the third stage from the current path MC1 side in the series stage of the solar battery module 7f and the solar battery module 7s arranged adjacent to and parallel to the solar battery module 7f. It is assumed that the shade SHD has fallen across the solar cells PV2 corresponding to the third level of the solar cell module 7f in series.

  Since the photovoltaic cell PV2 in which the shade SHD has dropped does not generate photovoltaic power and is merely a resistive load, the current path MCm is limited in current, and current flows in the current path MCm by normal photovoltaic power. No (see FIG. 10B). That is, no current flows in the current path MCm corresponding to simple series connection on either side of the solar cell module 7f and the solar cell module 7s.

  Therefore, the current solar cell module array 9f when it is assumed that there is no parallel connection is in a state in which no current can be taken out. However, the solar cell module array 9f according to the present embodiment is connected in parallel between the solar cell module 7f and the solar cell module 7s, and is connected to the bypass route MCs (bypass route) via the parallel current path (lead wire WL). ) Is formed and current flows.

  Moreover, the solar cell module 7f and the solar cell module 7s are set so that the direction of current flowing through the current path MCm is opposite. Therefore, as shown in FIG. 10B, in the same series stage, it is avoided that the solar cells PV2 that are affected by the shade are matched, and the photocurrent generated by the photovoltaic power generation when the bypass path MCs by the lead wiring WL functions effectively. It is supposed to be in a flowing state.

  Therefore, since the current path as a whole can be secured as the solar cell module array 9f, it is possible to take out the electric power according to the number of the received solar cells PV2 to the outside as it is. Therefore, the solar cell module array 9f generates a photovoltaic power (photogenerated photocurrent) corresponding to the light receiving area (the number of received solar cells PV2), and can avoid the influence of the shadow, and as a result High power generation efficiency can be ensured.

  In the present embodiment, for ease of understanding, the case where the solar cell module 7f and the solar cell module 7s are in parallel and the current path MCm is opposite to each other is shown. Increasing and arranging the reverse arrangement (adjacent solar cell modules 7 such that the current paths MCm that are opposite to each other flow in a balanced manner) have a balanced and balanced effect, and the effect as a countermeasure against shade is further increased.

  The specific matters according to the respective embodiments in the first to tenth embodiments described above can be appropriately applied to other embodiments.

1, 1f, 1s solar cell module 3, 3f, 3s solar cell module 6, 6f, 6s solar cell module 7, 7f, 7s solar cell module 8 solar cell module 9a, 9b, 9c, 9d, 9e, 9f solar cell module Array 11, 12, 13 Cell group 20 Wiring board CP, CP1, CP2, CP3 Connection point BP Connecting member MC1, MC2, MCm, MCr Current path MCs Bypass path MT1, MT2 Output terminal WL Lead wiring SHD Shade TB, TB1, TB2, TB3, TB4 Tab part TP, TP1, TP2, TP3 Terminal part PV1, PV2 Solar cell

Claims (9)

A group of cells in which a plurality of solar cells are connected to each other in series via connection points;
A terminal portion connected to the connection point;
Including at least a pair of tab portions formed outside the cell group with the terminal portions disposed thereon,
The tab portions are arranged in line symmetry with each other,
The solar cell module, wherein the terminal portion is arranged point-symmetrically at the tab portion. The solar cell module according to claim 1,
The tab portions are two pairs, and the pairs are arranged at different positions from each other. The solar cell module according to claim 1 or 2, wherein
There are a plurality of the connection points, and each of the terminal portions, which has the same number as the plurality of connection points, is a pair connected to each other in the tab portion, and each pair has a point-symmetric arrangement. A featured solar cell module. The solar cell module according to any one of claims 1 to 3, wherein
The cell group has an outer periphery of a pseudo rectangle in which four corners of the rectangle are hypotenuses,
The tab portion is arranged at the corner portion. The solar cell module according to any one of claims 1 to 4, wherein:
The cell group is mounted on a single wiring board, and the tab portion is formed by extending the wiring board. The solar cell module according to claim 5, wherein
The wiring board is a double-sided wiring, and the terminal portion is formed as a double-sided wiring connected to each other at the tab portion. The solar cell module according to any one of claims 1 to 6, wherein
The solar battery module, wherein the solar battery cell is a pseudo square in which four corners of a square are hypotenuses. The solar cell module according to any one of claims 1 to 6, wherein
The solar cell module is formed by dividing a pseudo-square having four square corners as hypotenuses.   A solar cell module array, wherein a plurality of the solar cell modules according to any one of claims 1 to 8 are connected.

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