WO2018061703A1

WO2018061703A1 - Solar cell module

Info

Publication number: WO2018061703A1
Application number: PCT/JP2017/032347
Authority: WO
Inventors: 俊行佐久間; 亮治内藤; 健悟松根; 島　正樹; 裕幸神納
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2016-09-29
Filing date: 2017-09-07
Publication date: 2018-04-05

Abstract

A first crossover wiring material 14a extends from one end side of a first solar cell string 12a. A first extraction wiring material 20a extends curving from the first crossover wiring material 14a. A second solar cell string 12b extends along the first solar cell string 12a. A second crossover wiring material 14b extends from one end side of the second solar cell string 12b along the first crossover wiring material 14a, intersecting the first extraction wiring material 20a. A second extraction wiring material 20b extends from the second crossover wiring material 14b along the first extraction wiring material 20a. With an insulating member 30, the first extraction wiring material 20a and the second crossover wiring material 14b are placed on mutually different surfaces. The insulating member 30 has a melting point that is higher than the temperature when performing laminating processing of this solar cell module 100.

Description

Solar cell module

The present invention relates to a solar cell module, and particularly to a solar cell module provided with an extraction wiring material.

The plurality of solar cell elements are electrically connected in series by the wiring material. The wiring members are electrically connected to each other by a connecting member, and are connected to a terminal box arranged on the back surface of the solar cell module, whereby the generated electric power is taken out (see, for example, Patent Document 1).

JP 2006-19440 A

A slit is provided on the back side of the solar cell panel, and the wiring material taken out from the slit is drawn to the outside. In order to prevent the extracted wiring member from coming into contact with the solar battery cell and causing a short circuit, the extracted wiring member is insulated by laminating. Moreover, in order to prevent the extraction wiring material from damaging the solar battery cell, an EVA (ethylene vinyl acetate copolymer) sheet is inserted between the extraction wiring material and the solar battery cell. These complicate the structure of the solar cell module including the solar cell panel and increase the manufacturing process of the solar cell module.

The present invention has been made in view of such circumstances, and an object thereof is to provide a technique for simplifying the structure of a solar cell module.

In order to solve the above problems, a solar cell module according to an aspect of the present invention is a solar cell module, and includes a first solar cell string and a first solar cell from one end side of the first solar cell string. A first transition wiring member extending in a direction different from the direction in which the string extends, a first extraction wiring member extending in a direction different from the direction in which the first transition wiring member extends, and the first solar cell string A second solar cell string extending along the second solar cell string, and a second transition wiring material extending from one end side of the second solar cell string along the first transition wiring material and crossing the first extraction wiring material Insulating members for arranging the second lead-out wiring member extending along the first lead-out wiring member from the second cross-over wiring member and the first lead-out wiring member and the second cross-over wiring member on different surfaces. With. At least a part of the insulating member has a melting point higher than the temperature when the solar cell module is laminated.

According to the present invention, the structure of the solar cell module can be simplified.

It is a top view from the back surface side of the solar cell module which concerns on the Example of this invention. 2A and 2B are enlarged plan views of a part of the solar cell panel of FIG. It is sectional drawing of the solar cell module of FIG. It is a top view from the back surface side of another solar cell module which concerns on the Example of this invention. It is the top view which expanded a part of solar cell panel of FIG.

An outline will be given before concretely explaining the present invention. The Example of this invention is related with the solar cell module from which the extraction wiring material is pulled out from the back surface side of a solar cell panel. The extraction wiring member is connected to a terminal box arranged on the back surface side of the solar cell panel, whereby electric power generated in the solar cell panel is output to the outside. The lead-out wiring member is disposed so as to overlap the solar battery cell in the solar battery panel. With such an arrangement, the extracted wiring member may come into contact with the solar battery cell, causing a short circuit. Moreover, there is a possibility that the extracted wiring material may come into contact with the solar battery cell and damage the solar battery cell. In order to cope with the former, the extraction wiring member is insulated by applying a lamination process to the extraction wiring member. In order to cope with the latter, an EVA sheet is inserted as a cushioning material between the extraction wiring member and the solar battery cell. These complicate the structure of the solar cell module including the solar cell panel and increase the manufacturing process of the solar cell module.

In order to simplify the structure of the solar cell module, in this embodiment, the extracted wiring material is not laminated and the EVA sheet is not inserted. Instead, insulating properties and cushioning properties are ensured by inserting an insulating member, for example, an insulating sheet, between the crossover wiring material and the solar battery cell and the extraction wiring material. In the following description, “parallel” and “orthogonal” include not only perfect parallel and orthogonal, but also a case of deviating from parallel within an error range. Further, “substantially” means that they are the same in an approximate range.

FIG. 1 is a plan view from the back side of a solar cell module 100 according to an embodiment of the present invention, and particularly shows a solar cell panel 110 of the solar cell module 100. In the solar cell module 100, a frame is attached so as to surround the periphery of the solar cell panel 110, and a terminal box is disposed on the back side of the solar cell panel 110. Here, description of the frame and the terminal box is omitted. As shown in FIG. 1, an orthogonal coordinate system including an x-axis, a y-axis, and a z-axis is defined. The x axis and the y axis are orthogonal to each other in the plane of the solar cell panel 110. The z axis is perpendicular to the x axis and the y axis and extends in the thickness direction of the solar cell panel 110. Further, the positive directions of the x-axis, y-axis, and z-axis are each defined in the direction of the arrow in FIG. 1, and the negative direction is defined in the direction opposite to the arrow. Of the two main surfaces forming the solar cell panel 110 and parallel to the xy plane, the main plane arranged on the positive side of the z axis is the light receiving surface, and the z axis The main plane arranged on the negative direction side is the back surface. Hereinafter, the positive direction side of the z-axis is referred to as “light-receiving surface side”, and the negative direction side of the z-axis is referred to as “back surface side”.

The solar cell panel 110 includes eleventh solar cells 10aa, collectively referred to as solar cells 10,..., 84th solar cells 10hd, first crossover wiring members 14a, collectively referred to as crossover wiring members 14, and second crossovers. Wiring material 14b, third cross wiring material 14c, fourth cross wiring material 14d, fifth cross wiring material 14e, sixth cross wiring material 14f, seventh cross wiring material 14g, eighth cross wiring material 14h, ninth cross wiring 14i, cell end wiring material 16, inter-cell wiring material 18, first extraction wiring material 20a, second extraction wiring material 20b, third extraction wiring material 20c, and fourth extraction wiring material 20d, collectively referred to as extraction wiring material 20. , Including fifth extraction wiring member 20e.

The solar cell panel 110 has a rectangular plate shape that spreads in the xy plane. The first non-power generation region 22a and the second non-power generation region 22b are arranged so as to sandwich the plurality of solar cells 10 in the x-axis direction. Specifically, the first non-power generation region 22a is arranged on the positive side of the x axis with respect to the plurality of solar cells 10, and the second non-power generation region 22b is in the negative direction of the x axis with respect to the plurality of solar cells 10. Placed on the side. The first non-power generation region 22 a and the second non-power generation region 22 b (hereinafter sometimes collectively referred to as “non-power generation region 22”) have a rectangular shape and do not include the solar battery cell 10.

Each of the plurality of solar cells 10 absorbs incident light and generates photovoltaic power. The solar battery cell 10 is made of, for example, a semiconductor material such as crystalline silicon, gallium arsenide (GaAs), or indium phosphorus (InP). The structure of the solar battery cell 10 is not particularly limited, but here, as an example, it is assumed that crystalline silicon and amorphous silicon are stacked. Although omitted in FIG. 1, a plurality of finger electrodes extending in the y-axis direction parallel to each other and extending in the x-axis direction so as to be orthogonal to the plurality of finger electrodes are provided on the light receiving surface and the back surface of each solar battery cell 10. A plurality of, for example, three bus bar electrodes are provided. The bus bar electrode connects each of the plurality of finger electrodes. Further, the bus bar electrode and the finger electrode are formed of, for example, silver paste.

The plurality of solar cells 10 are arranged in a matrix on the xy plane. Here, as an example, four solar cells 10 are arranged in the x-axis direction, and eight solar cells 10 are arranged in the y-axis direction. In addition, the number of the photovoltaic cells 10 arranged in the x-axis direction and the number of the photovoltaic cells 10 arranged in the y-axis direction are not limited to this. The four solar cells 10 arranged side by side in the x-axis direction are connected in series by the inter-cell wiring member 18 to form one solar cell string 12. For example, the first solar cell string 12a is formed by connecting the eleventh solar cell 10aa, the twelfth solar cell 10ab, the thirteenth solar cell 10ac, and the fourteenth solar cell 10ad. Other solar cell strings 12, for example, the second solar cell string 12b to the eighth solar cell string 12h are formed in the same manner. As a result, the eight solar cell strings 12 are arranged in parallel in the y-axis direction.

One solar cell string 12 (hereinafter, also referred to as “first solar cell string 12”) among the eight solar cell strings 12 extends in the x-axis direction. In addition, another one of the eight solar cell strings 12 (hereinafter, also referred to as “second solar cell string 12”) extends along the first solar cell string 12.

For example, when the first solar cell string 12a corresponds to the “first solar cell string 12”, at least one of the second solar cell string 12b to the fourth solar cell string 12d becomes the “second solar cell string 12”. Correspond. Further, when at least one of the second solar cell string 12b and the third solar cell string 12c corresponds to the “first solar cell string 12”, the fourth solar cell string 12d becomes the “second solar cell string 12”. Correspond.

Further, when the eighth solar cell string 12h corresponds to the “first solar cell string 12”, at least one of the fifth solar cell string 12e to the seventh solar cell string 12g becomes the “second solar cell string 12”. Correspond. Further, when at least one of the sixth solar cell string 12f and the seventh solar cell string 12g corresponds to the “first solar cell string 12”, the fifth solar cell string 12e becomes the “second solar cell string 12”. Correspond.

In order to form the solar cell string 12, the inter-cell wiring member 18 connects the bus bar electrode on one light receiving surface side of the adjacent solar cells 10 and the bus bar electrode on the other back surface side. For example, the three inter-cell wiring members 18 for connecting the eleventh solar cell 10aa and the twelfth solar cell 10ab include the bus bar electrode on the back surface side of the eleventh solar cell 10aa and the twelfth solar cell 10ab. The bus bar electrode on the light receiving surface side is electrically connected.

Five of the nine crossover wiring members 14 are arranged in the first non-power generation region 22a, and the remaining four are arranged in the second non-power generation region 22b. Each of the sixth transition wiring member 14f to the ninth transition wiring member 14i arranged in the second non-power generation region 22b extends in the y-axis direction and is adjacent to each other via the cell end wiring member 16 12 is electrically connected. For example, the sixth crossover wiring member 14f is electrically connected to the fourteenth solar cell 10ad in the first solar cell string 12a and the twenty-fourth solar cell 10bd in the second solar cell string 12b via the cell end wiring member 16. Connected to. Here, the cell end wiring member 16 is arranged in the same manner as the inter-cell wiring member 18 on the light receiving surface or the back surface of the solar battery cell 10.

The first crossover wiring member 14a disposed in the first non-power generation region 22a is connected to the eleventh solar cell 10aa which is the positive end of the first solar cell string 12a on the x-axis side via the cell end wiring member 16. Is done. The first crossover wiring member 14 a extends from the connection portion with the cell end wiring member 16 in the positive direction of the y axis to the vicinity of the center of the solar cell panel 110 in the y axis direction. The first lead-out wiring member 20a is bent and extends in the negative direction of the x-axis from the first transition wiring member 14a.

The second crossover wiring member 14b is connected to the twenty-first solar cell 10ba, which is the positive end on the x-axis side of the second solar cell string 12b, via the cell end wiring member 16. In addition, the second crossover wiring member 14 b is also connected to the thirty-first solar cell 10 ca that is the positive end on the x-axis side of the third solar cell string 12 c via another cell end wiring member 16. With these connections, the second crossover wiring member 14b electrically connects the second solar cell string 12b and the third solar cell string 12c. Furthermore, the second crossover wiring member 14 b extends from the connection portion of the cell end wiring member 16 in the positive y-axis direction to the vicinity of the center of the solar cell panel 110 in the y-axis direction. That is, the second transition wiring member 14b extends along the first transition wiring member 14a. In particular, since the second crossover wiring member 14b is closer to the center of the solar cell panel 110 in the y-axis direction than the first crossover wiring member 14a, the second crossover wiring member 14b extends across the first lead-out wiring member 20a. The second lead-out wiring member 20b is bent in the negative direction of the x-axis from the second transition wiring member 14b, that is, extends along the first lead-out wiring member 20a.

The third crossover wiring member 14c is connected to the forty-first solar cell 10da, which is the positive end on the x-axis side of the fourth solar cell string 12d, via the cell end wiring member 16. The third crossover wiring member 14 c is also connected to the 51st solar cell 10 ea that is the positive side end of the fifth solar cell string 12 e through the other cell end wiring member 16. With these connections, the third crossover wiring member 14c electrically connects the fourth solar cell string 12d and the fifth solar cell string 12e. Such third crossover wiring member 14c extends in the y-axis direction so as to straddle the center of the solar cell panel 110 in the y-axis direction. In other words, the third transition wiring member 14c extends along the first transition wiring member 14a and extends across the first extraction wiring member 20a and the second extraction wiring member 20b. The third extraction wiring member 20c extends in the negative direction of the x-axis from the center portion of the second transition wiring member 14b, that is, along the first extraction wiring member 20a or the second extraction wiring member 20b.

The fourth crossover wiring member 14d and the fourth lead-out wiring member 20d are reversed and arranged in the y-axis direction with respect to the second crossover wiring member 14b and the second lead-out wiring member 20b. Further, the fifth crossover wiring member 14e and the fifth lead-out wiring member 20e are arranged so as to be reversed in the y-axis direction with respect to the first crossover wiring member 14a and the first lead-out wiring member 20a. Therefore, the first solar cell string 12a to the eighth solar cell string 12h are electrically connected in series, and the first extraction wiring member 20a to the fifth extraction wiring member 20e are arranged side by side in the y-axis direction. , Connected to a terminal box (not shown).

In such a configuration, the transition wiring member 14 and the extraction wiring member 20 connected to the first solar cell string 12 are respectively referred to as “first transition wiring member 14” and “first extraction wiring member 20”. It is released. The transition wiring member 14 and the extraction wiring member 20 connected to the second solar cell string 12 are referred to as “second transition wiring member 14” and “second extraction wiring member 20”, respectively. For example, when the first solar cell string 12a corresponds to the “first solar cell string 12”, the first transition wiring member 14a and the first extraction wiring member 20a are “first transition wiring member 14”, “first Respectively corresponding to the lead-out wiring member 20 ". At this time, at least one of the second transition wiring member 14 b and the third transition wiring member 14 c corresponds to the “second transition wiring member 14” and is connected to the “second transition wiring member 14”. At least one of the material 20b and the third extraction wiring member 20c corresponds to the “second extraction wiring member 20”.

When at least one of the second solar cell string 12b and the third solar cell string 12c corresponds to the “first solar cell string 12”, the second transition wiring member 14b and the second extraction wiring member 20b are “first”. Corresponding to the “crossover wiring member 14” and “first take-out wiring member 20”. At that time, the third transition wiring member 14c and the third extraction wiring member 20c correspond to the “second transition wiring member 14” and the “second extraction wiring member 20”, respectively. Further, the “first transition wiring member 14” and the “second transition wiring member 14” are similarly defined from the third transition wiring member 14c to the fifth transition wiring member 14e, and the third take-out wiring member 20c. To the fifth extraction wiring member 20e, the “first extraction wiring member 20” and the “second extraction wiring member 20” are similarly defined.

FIGS. 2 (a)-(b) are enlarged plan views of a part of the solar cell panel 110. FIG. 2A is an enlarged plan view of the central portion in the y-axis direction of the solar cell panel 110 of FIG. 1, that is, the portion where the first extraction wiring member 20a to the fifth extraction wiring member 20e are arranged. . The first crossover wiring member 14a to the fifth crossover wiring member 14e and the first lead-out wiring member 20a to the fifth lead-out wiring member 20e are arranged in the same manner as in FIG. Note that at least the first extraction wiring member 20a to the fifth extraction wiring member 20e are not laminated and are not covered. Furthermore, the first connection point 24a to the fifth connection point 24e are shown. At the first connection point 24a, the first transition wiring member 14a and the first extraction wiring member 20a are electrically connected while intersecting. . The same applies to the second connection point 24b to the fifth connection point 24e.

In the portion where the first extraction wiring member 20a to the fifth extraction wiring member 20e are disposed, the insulating member 30 omitted in FIG. 1 is disposed. The insulating member 30 has a multilayer structure in which EVA, PET (polyethylene terephthalate), and EVA are sequentially laminated in the z-axis direction, and corresponds to the above-described insulating sheet. Here, the melting point of EVA is about 70 to 80 ° C., and the melting point of PET is about 260 ° C. On the other hand, the temperature when laminating the solar cell panel 110 is about 150 ° C. That is, PET in the insulating member 30 has a melting point higher than the temperature when the solar cell panel 110 is laminated. Therefore, even after the solar cell panel 110 is manufactured by laminating, the insulating member 30 remains without melting. FIG. 2B is used to describe the shape of the insulating member 30.

FIG. 2 (b) shows the structure of the insulating member 30 and is shown in the same manner as FIG. 2 (a). The insulating member 30 has a shape in which two edge portions extending in the y-axis direction are recessed near the center in a rectangular shape longer in the y-axis direction than in the x-axis direction on the xy plane. In particular, the edge on the positive direction side of the x-axis is formed in a stepped shape by the first edge 34a to the seventh edge 34g. More specifically, the first stage 34a includes a first edge 34a extending in the x-axis direction, a second edge 34b and a sixth edge 34f extending in the y-axis direction, and a seventh edge 34g extending in the x-axis direction. Dents are formed. In addition, a second dent is formed by a third edge 34c extending in the x-axis direction, a fourth edge 34d extending in the y-axis direction, and a fifth edge 34e extending in the x-axis direction near the center of the first dent. Is formed. Further, a first groove 36a is formed on the second edge 34b, and a second groove 36b is formed on the sixth edge 34f. Returning to FIG.

The first transition wiring member 14a, the first connection point 24a, the first extraction wiring member 20a, the fifth transition wiring member 14e, the fifth connection point 24e, and the fifth extraction wiring member 20e are in the negative direction of the z axis of the insulating member 30. Placed on the side surface. The second transition wiring member 14b to the fourth transition wiring member 14d are arranged on the surface of the insulating member 30 on the positive side of the z axis, and the second extraction wiring member 20b to the fourth extraction wiring member 20d are insulating members. 30 on the negative side surface of the z-axis. Furthermore, the second connection point 24b to the fourth connection point 24d are not arranged on either the positive-side surface or the negative-side surface of the z-axis of the insulating member 30. That is, the insulating member 30 arranges the first extraction wiring member 20 and the second transition wiring member 14 on different surfaces.

Thus, the second crossover wiring member 14b or the third crossover wiring member 14c and the first lead-out wiring member 20a are arranged with the insulating member 30 sandwiched in the z-axis direction at a portion where they intersect. Further, the second extraction wiring member 20b or the fourth extraction wiring member 20d and the third transition wiring member 14c are also arranged with the insulating member 30 sandwiched in the z-axis direction at a portion where they intersect. As a result, the first lead-out wiring member 20 and the second transition wiring member 14 are insulated by the insulating member 30 even at the intersecting portion. Furthermore, the insulating member 30 arrange | positions the 41st photovoltaic cell 10da and the 51st photovoltaic cell 10ea on a different surface with respect to the 5th extraction wiring material 20e from the 1st extraction wiring material 20a. Therefore, the first extraction wiring member 20a to the fifth extraction wiring member 20e, the 41st solar cell 10da, and the 51st solar cell 10ea are also insulated by the insulating member 30.

The first fixing member 32a and the second fixing member 32b have a rectangular shape in the xy plane, and an adhesive is disposed on the surface on the positive direction side of the z axis. The first fixing member 32a and the second fixing member 32b are, for example, tapes. The 1st fixing member 32a fixes the 2nd transition wiring material 14b, the 3rd transition wiring material 14c, and the 41st photovoltaic cell 10da collectively. Moreover, the 2nd fixing member 32b fixes the 3rd crossover wiring material 14c, the 4th crossover wiring material 14d, and the 51st photovoltaic cell 10ea collectively. In addition, the slit 26 is provided in the negative direction side of the z-axis of the insulating member 30, and the fifth extraction wiring member 20 e is drawn from the first extraction wiring member 20 a to the outside. Since the slit 26 is on the insulating member 30, the creeping distance from the slit 26 to the solar battery cell 10 can be increased, so that the insulation can be improved.

FIG. 3 is a cross-sectional view of the solar cell module 100, and is a cross-sectional view taken along the line A-A ′ of FIG. The solar battery panel 110 is collectively referred to as a 41st solar battery cell 10da, a 42nd solar battery cell 10db, a 43rd solar battery cell 10dc, a 44th solar battery cell 10dd, and a transition wiring member 14 that are collectively referred to as the solar battery cell 10. 1st crossover wiring material 14a, 2nd crossover wiring material 14b, 3rd crossover wiring material 14c, cell edge wiring material 16, intercell wiring material 18, 1st extraction wiring material 20a, slit 26, insulating member 30, protection member 40 The first protection member 40a, the second protection member 40b, and the first sealing member 42a and the second sealing member 42b, which are collectively referred to as a sealing member 42, are included. The lower side of FIG. 3 corresponds to the light receiving side, and the upper side corresponds to the back side.

The 1st protection member 40a is arrange | positioned at the light-receiving surface side of the solar cell panel 110, and protects the surface of the solar cell panel 110. FIG. The first protective member 40a is made of a light-transmitting and water-blocking glass, a light-transmitting plastic, or the like, and is formed in a rectangular plate shape. Here, glass is used as an example. The 1st sealing member 42a is laminated | stacked on the back surface side of the 1st protection member 40a. The 1st sealing member 42a is arrange | positioned between the 1st protection member 40a and the photovoltaic cell 10, and adhere | attaches these. As the first sealing member 42a, for example, a thermoplastic resin such as a resin film of polyolefin, EVA, PVB (polyvinyl butyral), polyimide, or the like is used. A thermosetting resin may be used. The first sealing member 42a is formed of a rectangular sheet material having translucency and having a surface having substantially the same dimensions as the xy plane of the first protection member 40a.

The second sealing member 42b is laminated on the back side of the first sealing member 42a. The second sealing member 42b seals the plurality of solar cells 10, the inter-cell wiring member 18 and the like with the first sealing member 42a. The same thing as the 1st sealing member 42a can be used for the 2nd sealing member 42b. The second sealing member 42b may be integrated with the first sealing member 42a by heating in the laminating / curing process.

The second protective member 40b is laminated on the back side of the second sealing member 42b. The 2nd protection member 40b protects the back surface side of the solar cell panel 110 as a back sheet. As the second protective member 40b, for example, a resin film such as PET is used. Note that a laminated film having a structure in which an Al foil is sandwiched between resin films may be used as the second protective member 40b.

The third crossover wiring member 14c, the second crossover wiring member 14b, and the first crossover wiring member 14a are arranged side by side in the positive direction of the x-axis, and the third crossover wiring member 14c and the second crossover wiring member 14b An insulating member 30 is disposed on the negative direction side of the z axis. Here, the cell wiring member 16 from the 41st solar cell 10da is connected to the third transition wiring member 14c, and the first lead-out wiring member 20a is connected to the first transition wiring member 14a. The first lead-out wiring member 20a extends while intersecting the second transition wiring member 14b and the third transition wiring member 14c while sandwiching the insulating member 30 in the z-axis direction, and from the slit 26 provided in the second protection member 40b. Exposed outside. As described above, a terminal box (not shown) is connected to the first extraction wiring member 20a exposed to the outside from the slit 26. Furthermore, an Al frame frame may be attached around the solar cell panel 110.

As described above, since a resin film such as PET is used for the second protective member 40b, the second protective member 40b in the portion where the insulating member 30 is disposed is more than the portion where the insulating member 30 is not disposed. Projects to the negative direction side of the z-axis. Here, a portion protruding in the negative direction of the z-axis due to the arrangement of the insulating member 30 is shown as a peripheral portion 44, and a portion other than the peripheral portion 44 is shown as a non-peripheral portion 46. The protruding height in the z-axis direction of the peripheral portion 44 with respect to the non-peripheral portion 46 corresponds to the thickness of the insulating member 30 in the z-axis direction.

Up to now, five transition wiring members 14 and five lead-out wiring members 20 are provided by arranging eight solar cell strings 12 on the solar cell panel 110. On the other hand, four transition wiring members 14 and four extraction wiring members 20 may be provided by arranging six solar cell strings 12 on the solar cell panel 110. Even in such a case, the insulating member 30 has the same shape as before. Hereinafter, such a case will be described.

FIG. 4 is a plan view from the back side of another solar cell module 100 according to the embodiment of the present invention. This is shown as in FIG. Here, when the first solar cell string 12a corresponds to the “first solar cell string 12”, at least one of the second solar cell string 12b and the third solar cell string 12c is the “second solar cell string 12”. Corresponding to Further, when the sixth solar cell string 12f corresponds to the “first solar cell string 12”, at least one of the fourth solar cell string 12d and the fifth solar cell string 12e becomes the “second solar cell string 12”. Correspond.

Since the second crossover wiring member 14b is closer to the center of the solar cell panel 110 in the y-axis direction than the first crossover wiring member 14a, it extends across the first lead-out wiring member 20a. The third crossover wiring member 14c and the third lead-out wiring member 20c are disposed so as to be reversed in the y-axis direction with respect to the second crossover wiring member 14b and the second lead-out wiring member 20b. Further, the fourth transition wiring member 14d and the fourth extraction wiring member 20d are disposed so as to be reversed in the y-axis direction with respect to the first transition wiring member 14a and the first extraction wiring member 20a.

The first transition wiring member 14a and the first extraction wiring member 20a correspond to the “first transition wiring member 14” and the “first extraction wiring member 20”, respectively, and the second transition wiring member 14b and the second extraction wiring member 20a. 20b corresponds to the “second transition wiring member 14” and the “second extraction wiring member 20”, respectively. Further, the fourth transition wiring member 14d and the fourth extraction wiring member 20d correspond to the “first transition wiring member 14” and the “first extraction wiring member 20”, respectively, and the third transition wiring member 14c and the third extraction wiring member 20d. The wiring member 20c corresponds to the “second transition wiring member 14” and the “second extraction wiring member 20”, respectively.

FIG. 5 is an enlarged plan view of a part of the solar cell panel 110. This is shown in the same manner as in FIG. The first crossover wiring member 14a to the fourth crossover wiring member 14d and the first lead-out wiring member 20a to the fourth lead-out wiring member 20d are arranged in the same manner as in FIG. The first transition wiring member 14a, the first connection point 24a, the first extraction wiring member 20a, the fourth transition wiring member 14d, the fourth connection point 24d, and the fourth extraction wiring member 20d are in the negative direction of the z axis of the insulating member 30. Placed on the side surface. Further, the second transition wiring member 14b and the third transition wiring member 14c are arranged on the surface of the insulating member 30 on the positive side of the z axis, and the second extraction wiring member 20b and the third extraction wiring member 20c are insulating members. 30 on the negative side surface of the z-axis. Furthermore, the second connection point 24b and the third connection point 24c are not arranged on either the surface on the positive direction side or the surface on the negative direction side of the z-axis in the insulating member 30.

That is, the insulating member 30 arranges the first extraction wiring member 20 and the second transition wiring member 14 on different surfaces. As a result, the second crossover wiring member 14b and the first lead-out wiring member 20a are arranged with the insulating member 30 sandwiched in the z-axis direction at a portion where they intersect. Further, the third crossover wiring member 14c and the fourth lead-out wiring member 20d are also arranged with the insulating member 30 sandwiched in the z-axis direction at a portion where they intersect.

Since the number of the transition wiring members 14 and the lead-out wiring members 20 are both “4”, the two-stage formed by the third edge 34 c, the fourth edge 34 d, and the fifth edge 34 e in the insulating member 30. The crossover wiring member 14 and the lead-out wiring member 20 are not arranged in the eye recess. Furthermore, the insulating member 30 has a first groove portion 36a that can sandwich the second lead-out wiring member 20b at the second edge 34b that contacts the second lead-out wiring member 20b extending from the second connection point 24b. Further, the insulating member 30 has a second groove portion 36b that can sandwich the third lead-out wiring member 20c at the sixth edge 34f that contacts the third lead-out wiring member 20c extending from the third connection point 24c.

The 1st fixing member 32a fixes the 1st crossover wiring material 14a, the 2nd crossover wiring material 14b, and the 31st photovoltaic cell 10ca collectively. Moreover, the 2nd fixing member 32b fixes the 3rd crossover wiring material 14c, the 4th crossover wiring material 14d, and the 41st photovoltaic cell 10da collectively. In addition, the slit 26 is provided in the negative direction side of the z axis of the insulating member 30, and the fourth extraction wiring member 20 d is drawn out from the slit 26 to the outside.

Below, the manufacturing method of the solar cell panel 110 in the solar cell module 100 is demonstrated. First, from the positive direction of the z axis toward the negative direction, the first protection member 40a, the first sealing member 42a, the solar battery 10 and the like, the insulating member 30, the second sealing member 42b, and the second protective member 40b are provided. A laminated body is produced | generated by superimposing in order. Following this, a laminate curing process is performed on the laminate. In this step, air is extracted from the laminated body, and heated and pressurized to integrate the laminated body. In the vacuum laminating in the laminating and curing process, the temperature is set to about 150 ° C. as described above.

According to the embodiment of the present invention, in the insulating member 30, the first extraction wiring member 20 and the second transition wiring member 14 are arranged on different surfaces. It is possible to insulate the transition wiring member 14 from the other. Further, since the first extraction wiring member 20 and the second transition wiring member 14 are insulated by the insulating member 30, it is possible to eliminate the need for laminating the extraction wiring member 20. Moreover, since the insulating member 30 has a melting point higher than the temperature when the solar cell panel 110 is laminated, the first extraction wiring member 20 and the second transition wiring member 14 can be insulated even after the lamination. Moreover, since the insulating member 30 is formed of a laminated structure of EVA, PET, and EVA, cushioning properties can be ensured. Moreover, since only the insulating member 30 is inserted, the structure of the solar cell module 100 can be simplified. Moreover, since the structure of the solar cell module 100 is simplified, the complexity of the manufacturing process can be suppressed.

Moreover, since the insulating member 30 arrange | positions the 1st extraction wiring material 20 and the 1st transition wiring material 14 in a different surface, and makes these connection points 24 non-arrangement, the 1st extraction wiring material 20 The first lead-out wiring member 20 can be pulled out to the outside while the second cross-over wiring member 14 is insulated. Moreover, since the insulating member 30 arrange | positions the 2nd extraction wiring material 20 and the 2nd transition wiring material 14 in a different surface, and makes these connection points 24 non-arrangement, the 1st extraction wiring material 20 The second lead-out wiring member 20 can be pulled out to the outside while the second cross-over wiring member 14 is insulated. Further, since the insulating member 30 has the first-stage depression and the second-stage depression, even if the number of the transition wiring members 14 and the extraction wiring members 20 is “4”, “5” Even in some cases it can be used. Moreover, since the insulating member 30 has the groove part 36, fixation of the 2nd extraction wiring material 20 can be strengthened. Further, since the slit 26 is disposed on the insulating member 30, the creepage distance can be increased. Moreover, since the fixing member 32 fixes the 1st crossover wiring material 14, the 2nd crossover wiring material 14, and the insulating member 30 collectively, the usage-amount of the fixing member 32 can be reduced.

The outline of this example is as follows. The solar cell module 100 of an aspect of the present invention extends from the first solar cell string 12 and one end side of the first solar cell string 12 in a direction different from the direction in which the first solar cell string 12 extends. The first transition wiring member 14, the first lead-out wiring member 20 extending in a direction different from the direction in which the first transition wiring member 14 extends, and the second sun extending along the first solar cell string 12. A battery string 12, a second transition wiring member 14 extending from one end side of the second solar cell string 12 along the first transition wiring member 14 and intersecting the first extraction wiring member 20; The second extraction wiring member 20 extending from the two transition wiring members 14 along the first extraction wiring member 20, and the first extraction wiring member 20 and the second transition wiring member 14 are arranged on different surfaces. Insulation And a wood 30. At least a part of the insulating member 30 has a melting point higher than the temperature when the solar cell module 100 is laminated.

The insulating member 30 is connected to the first transition wiring member 14 and the first extraction wiring member 20 while the first extraction wiring member 20 and the first transition wiring member 14 are arranged on different surfaces. You may have the shape which makes 24 non-arrangement.

The insulating member 30 is connected to the second connecting wiring member 14 and the second extracting wiring member 20 while the second extracting wiring member 20 and the second connecting wiring member 14 are arranged on different surfaces. You may have the shape which makes 24 non-arrangement.

The insulating member 30 may arrange the solar cells 10 included in the second solar cell string 12 on different surfaces with respect to the first extraction wiring member 20 and the second extraction wiring member 20.

The insulating member 30 may include a groove portion 36 that can sandwich the second lead-out wiring member 20 at the edge 34 that contacts the second lead-out wiring member 20 extending from the connection point 24.

A second protective member 40b for arranging the first extraction wiring member 20 and the second extraction wiring member 20 between the insulating member 30 may be further provided. The second protection member 40b may include a slit 26 on the insulating member 30 that draws the first extraction wiring member 20 and the second extraction wiring member 20 to the outside.

A fixing member 32 that fixes the first transition wiring member 14, the second transition wiring member 14, and the insulating member 30 together may be further provided.

The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to each of those constituent elements or combinations of processing processes, and such modifications are also within the scope of the present invention. .

In this embodiment, the insulating member 30 has the same shape regardless of whether the number of the transition wiring members 14 and the lead-out wiring members 20 is “4” or “5”. However, the present invention is not limited to this. For example, when the number of the transition wiring members 14 and the lead-out wiring members 20 is “4”, the insulating member 30 may have a shape that does not include the second-stage depression. According to this modification, the degree of freedom of configuration can be improved.

10 solar cells, 12 solar cell strings (first solar cell string, second solar cell string), 14 transition wiring materials (first transition wiring material, second transition wiring material), 16 cell end wiring materials , 18 inter-cell wiring material, 20 extraction wiring material (first extraction wiring material, second extraction wiring material), 22 non-power generation region, 24 connection points, 26 slits, 30 insulation members, 32 fixing members, 34 edges 36, groove part, 40 protective member, 42 sealing member, 44 peripheral part, 46 non-peripheral part, 50 terminal box, 52 cable, 60 adhesive member, 100 solar cell module, 110 solar cell panel.

Claims

A solar cell module,
A first solar cell string;
A first transition wiring member extending from one end side of the first solar cell string in a direction different from a direction in which the first solar cell string extends;
A first extraction wiring member extending in a direction different from a direction in which the first transition wiring member extends;
A second solar cell string extending along the first solar cell string;
A second transition wiring member extending from one end side of the second solar cell string along the first transition wiring member and intersecting the first extraction wiring member;
A second lead-out wiring member extending from the second transition wiring member along the first lead-out wiring member;
An insulating member for disposing the first lead-out wiring member and the second transition wiring member on different surfaces;
At least a part of the insulating member has a melting point higher than the temperature when the solar cell module is laminated.
The insulating member has a connection point between the first transition wiring member and the first lead wiring member while the first lead wiring member and the first transition wiring member are arranged on different surfaces. 2. The solar cell module according to claim 1, wherein the solar cell module has a shape that is not arranged.
The insulating member has a connection point between the second transition wiring member and the second lead wiring member while the second lead wiring member and the second transition wiring member are arranged on different surfaces. 2. The solar cell module according to claim 1, wherein the solar cell module has a shape that is not arranged.
The insulating member is configured to dispose solar cells included in the second solar cell string on different surfaces with respect to the first extraction wiring material and the second extraction wiring material. The solar cell module of any one of Claim 1 to 3.
The said insulating member is provided with the groove part which can pinch | interpose the said 2nd extraction wiring material in the edge part which contacts the said 2nd extraction wiring material extended from the said connection point. Solar cell module.
A protective member for disposing the first lead-out wiring member and the second lead-out wiring member between the insulating members;
The said protection member equips the said insulating member with the slit which draws out the said 1st extraction wiring material and the said 2nd extraction wiring material outside, The any one of Claim 1 to 5 characterized by the above-mentioned. Solar cell module.
4. The solar cell module according to claim 1, further comprising a fixing member that fixes the first transition wiring member, the second transition wiring member, and the insulating member together. 5. .