WO2014033884A1

WO2014033884A1 - Wiring material for solar cell module, solar cell module, and solar cell module manufacturing method

Info

Publication number: WO2014033884A1
Application number: PCT/JP2012/072078
Authority: WO
Inventors: 司川上; 裕幸神納; 聡生柳浦; 光太郎住友; 友宏舟谷
Original assignee: 三洋電機株式会社
Priority date: 2012-08-30
Filing date: 2012-08-30
Publication date: 2014-03-06
Also published as: JPWO2014033884A1; JP6249369B2

Abstract

A wiring material (13) for a solar cell module (10) includes: a first part (14), which has a first contact portion (15) in contact with and connected to the light receiving surface of one solar cell (11), and a first non-contact portion (16), which extends outward from the first contact portion, and which bends toward above the light receiving surface by being spaced apart from the light receiving surface; a second part (17), which has a second contact portion (18) in contact with and connected to the rear surface of the other solar cell (12), and a second non-contact portion (19), which extends outward from the second contact portion, and which bends toward below the rear surface by being spaced apart from the rear surface; and an intermediate part (20), which is bent from the peak (31) of the bend of the first non-contact portion (16) toward the rear surface of the other solar cell (12), and which is connected to the peak (33) of the bend of the second non-contact portion (19). The thickness of the wiring material is more than that of the solar cell.

Description

Solar cell module wiring material, solar cell module, and solar cell module manufacturing method

The present invention relates to a wiring material for a solar cell module, a solar cell module, and a method for manufacturing a solar cell module using the solar cell module.

The solar cell module is configured by connecting a plurality of solar cells to each other with a plurality of wiring members.

Patent Document 1 has a contact portion in which a wiring member electrically connected to the solar cell contacts the main surface of the solar cell, and a non-contact portion that extends to the outside of the main surface of the solar cell. And the structure by which a non-contact part is arrange | positioned so that it may space apart from the boundary part of the main surface and side surface of a solar cell is disclosed.

Patent Document 2 describes that in a solar cell module in which solar cells adjacent to each other are connected by an interconnector that is a wiring material, an uneven portion is provided on the interconnector. This states that it is possible to prevent the semiconductor substrate of the solar battery cell from being greatly warped during the manufacturing process of the solar battery module and to prevent cell cracking and electrode peeling.

JP 2009-81205 A JP 2005-302902 A

It is to reduce the stress generated in the wiring material that is bent and connected to the solar cell.

The wiring member of the solar cell module according to the present invention is directed from the first contact portion connected in contact with the light receiving surface of one solar cell and the other solar cell adjacent to the one solar cell from the first contact portion. A first portion having a first non-contact portion that extends away from the light-receiving surface and curves upward, and a second contact portion and a second contact portion that are in contact with and connected to the back surface of the other solar cell. A second portion having a second non-contact portion that extends outward from the one solar cell and separates from the back surface and curves downward, and from the top of the first non-contact portion to the back surface of the other solar cell. A wiring member including an intermediate portion bent toward the second non-contact portion and connected to an apex of the second non-contact portion, wherein the thickness of the wiring member is greater than the thickness of the solar cell.

Moreover, the manufacturing method of the solar cell module which concerns on this invention is contacted and connected to the light-receiving surface of one solar cell so that the light-receiving surface of one solar cell and the back surface of the other solar cell may be connected. A first portion having a first non-contact portion that extends from the contact portion and the first contact portion toward the other solar cell adjacent to the one solar cell and is curved away from the light-receiving surface and curved upward. A second non-contact portion that contacts and is connected to the back surface of the other solar cell, and a second non-contact portion that extends from the second contact portion toward the one solar cell and that curves away from the back surface and curves downward. A solar cell that includes a second portion having a curved portion of the first non-contact portion and an intermediate portion that is bent toward the back surface of the other solar cell and is connected to the curved portion of the second non-contact portion. Forming a wiring material thicker than the thickness of the first wiring material; The contact portion is connected to the light receiving surface of one solar cell, the second contact portion of the wiring material is connected to the back surface of the other solar cell, and the sealing material on the light receiving surface side is disposed on the light receiving surface side of the solar cell, The back surface side sealing material is disposed on the back surface side of the solar cell, the light receiving surface side protection member is disposed outside the light receiving surface side sealing material, and the back surface side protection member is disposed outside the back surface side sealing material. Place.

Since the wiring material is connected by providing a non-contact part at the end of the solar cell, the stress generated in the wiring material can be reduced.

It is a block diagram of the solar cell module in embodiment. It is the elements on larger scale of FIG. It is a flowchart which shows the procedure which manufactures the solar cell module in embodiment. It is a figure which shows the example of the other 3 shaping | molding for the comparison with the shaping | molding method of the wiring material in embodiment, and a comparison. It is a figure which shows the result of having calculated | required the magnitude | size of the stress which arises in a wiring material about the four shaping | molding methods of FIG. 4 when a wiring material expands and contracts.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The materials, thicknesses, dimensions, and the like described below are examples for explanation, and can be appropriately changed according to the specifications of the solar cell module. Hereinafter, in all the drawings, one or the corresponding element is denoted by the same reference numeral, and redundant description is omitted.

FIG. 1 is a cross-sectional view showing the structure of the solar cell module 10. The

solar cells

11 and 12 constituting the solar cell module 10 have, as main surfaces, a light receiving surface that is a surface on which light from outside the

solar cells

11 and 12 is mainly incident, and a back surface that is a surface opposite to the light receiving surface. In FIG. 1, the upper side of the paper surface is the light receiving surface side, and the lower side is the back surface side.

The solar cell module 10 is formed by connecting a plurality of

solar cells

11 and 12 in series using a plurality of wiring members 13. In FIG. 1, as a unit of series connection, reference numerals are assigned to portions where the light receiving surface of one solar cell 11 and the back surface of the other solar cell 12 are connected using the wiring material 13. Hereinafter, the description will be continued on behalf of the

solar cells

11 and 12 and the wiring member 13.

The

solar cells

11 and 12 include a photoelectric conversion unit that generates light-generated carriers of holes and electrons by receiving light such as sunlight. The photoelectric conversion unit is provided on a substrate of a semiconductor material such as crystalline silicon (c-Si), gallium arsenide (GaAs), indium phosphide (InP), for example. The structure of the photoelectric conversion unit is a pn junction in a broad sense. For example, a heterojunction of an n-type single crystal silicon substrate and amorphous silicon can be used. In this case, an i-type amorphous silicon layer, a p-type amorphous silicon layer doped with boron (B) or the like, and indium oxide (In) are formed on the substrate on one side of the light-receiving surface side or the back surface side. ₂ O ₃ ) a transparent conductive film (TCO) composed of a light-transmitting conductive oxide was laminated, and an i-type amorphous silicon layer, phosphorus (P), etc. were doped on the other substrate An n-type amorphous silicon layer and a transparent conductive film can be stacked.

The photoelectric conversion unit may have a structure other than this as long as it has a function of converting light such as sunlight into electricity. For example, a structure including a p-type polycrystalline silicon substrate, an n-type diffusion layer formed on the light-receiving surface side, and an aluminum metal film formed on the back surface side may be used.

A connection electrode is formed on the surface of the transparent conductive film using a conductive paste or the like. The

solar cells

11 and 12 include a photoelectric conversion unit, a transparent conductive film, and a connection electrode, and the thickness thereof varies depending on the specifications of the solar cell module 10. In the following description, the thin

solar cells

11 and 12 will be described with a thickness of 0.1 to 0.2 mm. This thickness is merely an example, and other thicknesses may be used.

The wiring member 13 is a conductive member, and is connected to a connection electrode formed on the surface of the transparent conductive film on the photoelectric conversion portion using a conductive paste or the like via an adhesive. As the wiring member 13, a thin plate made of a metal conductive material such as copper is used. Instead of a thin plate, a stranded wire can be used. As the conductive material, in addition to copper, silver, aluminum, nickel, tin, gold, or an alloy thereof can be used. Although the thickness of the wiring material 13 is set according to specifications such as the generated power of the solar cell module 10, it is often not possible to make it too thin even if the

solar cells

11 and 12 become thin. Hereinafter, the description will be continued assuming that the thickness of the wiring member 13 is larger than the thickness of the

solar cells

11 and 12 in the range of 0.1 to 0.4 mm. This thickness is merely an example, and other thicknesses may be used.

As the adhesive, acrylic-based, highly flexible polyurethane-based, epoxy-based thermosetting resin adhesive, or solder can be used. The thermosetting resin adhesive includes conductive particles. As the conductive particles, nickel, silver, nickel with gold coating, copper with tin plating, or the like can be used. An insulating resin adhesive can also be used as the adhesive. In this case, either one or both of the wiring material 13 and the connection electrode facing each other are made uneven, and the resin is appropriately removed from between the wiring material 13 and the connection electrode to establish electrical connection. Like that.

The wiring member 13 that connects the light-receiving surface of the solar cell 11 and the back surface of the solar cell 12 is formed so as to be substantially S-shaped toward the paper surface of FIG.

The curved portion on the right side of the substantially S shape is the first portion 14 of the wiring member 13. The first portion 14 is in contact with and connected to the light receiving surface of one solar cell 11, and extends outward from the first contact portion 15 toward the adjacent solar cell 12 and is separated from the light receiving surface. The first non-contact portion 16 is curved toward the upper side of the light receiving surface. The first contact portion 15 is a portion that is electrically and mechanically connected to the connection wiring of the solar cell 11, and the first non-contact portion 16 is disposed on the light receiving surface of the solar cell 11, At least a portion that is not electrically connected to the solar cell 11 including the connection electrode.

The bent portion on the left side of the substantially S shape is the second portion 17 of the wiring member 13. The second portion 17 contacts the back surface of the other solar cell 12 adjacent to the one solar cell 11 and is connected to the outside from the second contact portion 18 to the adjacent solar cell 11. It has the 2nd non-contact part 19 extended and spaced apart from the back surface, and curving toward the back surface lower side. The second contact portion 18 is a portion that is electrically and mechanically connected to the connection wiring of the solar cell 12, and the second non-contact portion 19 is disposed on the back surface of the solar cell 12. It is a part which is not electrically connected with the solar cell 12 including the electrode for at least.

The portion connecting the right bent portion and the left bent portion of the substantially S shape is the intermediate portion 20 of the wiring member 13. The intermediate portion 20 is a portion that is bent from the curved top of the first non-contact portion 16 toward the back surface of the other solar cell 12 and connected to the curved top of the second non-contact portion 19.

Further details of the shape of the wiring member 13 will be described later with reference to FIG. The light receiving surface of the solar cell 11 and the back surface of the solar cell 12 are connected to each other using the wiring member 13 formed in this way, and a plurality of solar cells are connected in series by the same connection method. A structure in which a plurality of solar cells are connected by a plurality of wiring members is called a solar cell string. In the solar cell module 10, a solar cell string is sandwiched between a light-receiving surface side sealing material 21 and a back surface-side sealing material 22, and a light-receiving surface side protection member 23 and a back surface side protection member 24 are disposed outside the solar cell string. The ends are fixed by

frames

25 and 26.

The sealing material 21 on the light receiving surface side and the sealing material 22 on the back surface side are sheet-like members having a role as a shock buffering material and a function of preventing intrusion of foreign matter and moisture with respect to the

solar cells

11 and 12. It is. As these sealing

materials

21 and 22, for example, ethylene vinyl acetate (EVA) which is an olefin resin is used. In addition to EVA, EEA, PVB, silicone resin, urethane resin, acrylic resin, and epoxy resin can also be used. In addition, a coloring material such as titanium oxide can be added to the sealing material 22 on the back surface side to form a white colored layer.

FIG. 2 is an enlarged view showing details of the shape of the wiring member 13. FIG. 2 is a cross-sectional view of the

solar cells

11 and 12 and the wiring member 13 in the series connection direction of the

solar cells

11 and 12. Here, as the dimensional relationship of the thickness, the thickness of the

solar cells

11 and 12 is A, the thickness of the wiring material 13 is B, and the sealing material 21 on the light receiving surface side on the upper surface of the first contact portion 15 of the wiring material 13. The thickness of the sealing material 22 on the back surface side of the back surface of the solar cell 11 is D. At this time, the sum of the thickness of the sealing material 21 on the light receiving surface side and the thickness of the sealing material 22 on the back surface side = E is represented by A + B + C + D. In the thin solar cell module 10, the thickness of the sealing material on the wiring material 13 is C. The apex of the curvature of the first non-contact part 16 and the apex of the curve of the second non-contact part 19 are kept within the range of the thickness C of the sealing material.

Protective member 23 on the light receiving surface side is a transparent plate or film that can take in light from the outside. As the light-receiving surface side protective member 23, a light-transmitting member such as a glass plate, a resin plate, or a resin film can be used. The same protective member 24 on the back surface side as the protective member 23 on the light receiving surface side can be used. In the case of a solar cell module having a structure that does not require light reception from the back side, an opaque plate or film can be used as the protection member 24 on the back side. For example, a laminated film such as a resin film having an aluminum foil inside can be used.

In FIG. 2, the boundary point between the first contact portion 15 and the first non-contact portion 16 is a separation start point 30 that starts to separate from the light receiving surface of one solar cell 11 with respect to the first non-contact portion 16. With the separation start point 30 as a boundary, the connection electrode of the solar cell 11 and the wiring member 13 are electrically and mechanically connected at the first contact portion 15, and the light receiving surface of the solar cell 11 and the wiring at the first non-contact portion 16. The material 13 is at least not mechanically connected.

In the longitudinal direction of the wiring member 13, the position of the apex 31 of the curvature of the first non-contact part 16 is set so as to correspond to the position of the end of the light receiving surface of the solar cell 11. The position of the apex 31 in the height direction is closer to the solar cell 11 than the boundary between the sealing material 21 on the light receiving surface side and the protective member 23 on the light receiving surface side. As described above, the bending of the first non-contact portion 16 is performed within the range of the dimension C.

Similarly, the boundary point between the second contact portion 18 and the second non-contact portion 19 is a separation start point 32 that starts to separate from the back surface of the other solar cell 12 with respect to the second non-contact portion 19. Similarly to the separation start point 30, the connection electrode of the solar cell 12 and the wiring member 13 are electrically and mechanically connected to each other at the second contact portion 18 with the separation start point 32 as a boundary, and the second non-contact portion 19 is a solar cell. The back surface of 12 and the wiring member 13 are not at least electrically connected. Since there is an adhesive, the second non-contact portion 19 is mechanically connected to the solar cell 12 to the limit.

Similarly, in the longitudinal direction of the wiring member 13, the position of the vertex 33 of the curve of the second non-contact portion 19 is set so as to correspond to the position of the end of the back surface of the solar cell 12, and the height direction of the vertex 33. Is positioned on the solar cell 12 side of the boundary between the sealing material 22 on the back surface side and the protective member 24 on the back surface side.

The tangent line 40 is a tangent line at a point 37 that becomes an inflection point of the bending direction in the first non-contact portion 16. Similarly, the tangent line 41 is a tangent line at a point that becomes the inflection point 38 in the second non-contact portion 19. The tangent line 42 is a tangent line at a point 39 that becomes an inflection point in the middle portion 20 at the bending direction.

The distance dimension between the separation start point 30 of the first non-contact part 16 and the separation start point 32 of the second non-contact part 19 is a molding range of the wiring member 13. The forming range of the wiring member 13 is set so that the

tangent lines

40, 41, and 42 have the following relationship together with the dimensions A, B, C, and D. That is, the angle θ ₁ formed by the tangent line 40 and the plane parallel to the light receiving surface of the solar cell 11 is set to θ ₁ > 0, with the direction of lifting to the light receiving surface side from the light receiving surface as a plus. In addition, the angle θ ₂ formed by the tangent line 41 and the plane parallel to the back surface of the solar cell 12 is set to θ ₂ > 0, where the direction of lifting from the back surface to the back surface side is plus. The angle θ ₃ formed by the tangent line 40 and the tangent line 42 is set to be an obtuse angle. Specifically, an angle θ ₃ formed by the point 37, the intersection of the tangent line 40 and the tangent line 42, and the point 39 is set to be an obtuse angle. Further, the angle θ ₄ formed by the tangent line 41 and the tangent line 42 is set to be an obtuse angle. Specifically, the angle θ ₄ formed by the point 38, the intersection of the tangent line 41 and the tangent line 42, and the point 39 is set to be an obtuse angle.

The first non-contact portion 16, the intermediate portion 20, and the second non-contact portion 19 are preferably formed so as not to have a linear shape. Specifically, the first non-contact portion 16 is configured by combining a curve connecting the separation start point 30 and the point 37 and a curve connecting the point 37 and the vertex 31, and the intermediate portion 20 is configured by the vertex 31 and the point 31. 39, a curve connecting the point 39 and the vertex 33, and the second non-contact part 19 includes a curve connecting the vertex 33 and the point 38, a point 38 and the separation start point 32. Combining with connecting curves. By setting it as such a structure, the stress which arises in the wiring material 13 can be disperse | distributed, and the disconnection of the wiring material 13 can be prevented. The stress generated in the wiring material will be described later.

FIG. 3 is a flowchart showing a procedure for manufacturing the solar cell module 10. First, a plurality of solar cells are formed (S10). Parallel to this, a wiring material is prepared. This wiring material is an unmolded wiring material before the molding described in FIG. 2 is still performed (S11). This unmolded wiring material is formed into the shape described in FIG. 2 (S12). That is, the first part 14 having the first contact part 15 and the first non-contact part 16, the second part 17 having the second contact part 18 and the second non-contact part 19, the first part 14 and the second part. 17 is formed into a wiring member 13 including an intermediate portion 20 that is a portion connecting 17.

Then, the first contact portion 15 is connected to the light receiving surface of one solar cell 11 (S13), and the second contact portion 18 is connected to the back surface of the other solar cell 12 (S14). This is repeated for all the solar cells to form a solar cell string (S15).

Thereafter, the light receiving surface side sealing material 21, the back surface side sealing material 22, and the back surface side protective member 23 disposed so as to sandwich the solar cell string are disposed on the light receiving surface side protection member 23 (S <b> 16). Further, the laminated body is heated and pressurized (S17), and the ends are fixed by the

frames

25 and 26 to obtain the solar cell module 10 (S18).

In the above description, in S12, the plurality of wiring members 13 previously formed into a predetermined shape are prepared. However, when the number of solar cells constituting the solar cell string is small, the planar size of the solar cell is large, or the like. The separation start point 30, the curve vertex 31, the curve vertex 33, and the separation start point 32 may be sequentially formed while being connected to the solar cell using the unformed wiring material.

The results of simulation evaluation using the finite element method will be described with respect to the effects of the above configuration, in particular, the relationship between the shape of the wiring material and the stress generated in the wiring material. FIG. 4 shows four models used for the simulation. FIG. 4C shows a model of the wiring member 13. Here, the molding shape between the constraining ranges on both sides of the wiring member 13 is the content described in FIG. That is, the first non-contact portion 16 and the second non-contact portion 19 are formed, and the three

tangent lines

40, 41, and 42 are set in a predetermined angular relationship. (D) is the same as (c) except that the constraint range is narrowed.

4A and 4B, neither the first non-contact part 16 nor the second non-contact part 19 is provided, and the first non-contact part 16 and the second non-contact part 19 are not provided. It is an example of the wiring material shape | molded only by the linear part. Here, unlike (c) and (d), there are two tangents, and the angular relationship of each tangent is also different from (c) and (d). In (b), the distance between the constraining portions on both sides is the same as (c) and (d). Compared with (b), (a) narrows the space | interval between the constraining parts of both sides, and strengthens the bending between them.

FIG. 5 is a diagram showing the results of simulation. In the simulation, the magnitude of the stress generated in the wiring material when the wiring material expands and contracts due to a temperature change was obtained.

FIG. 5 is a diagram showing a result of simulating a change in stress generated in the wiring material when the wiring material is not in a stretched state in the solar cell module at room temperature and when the temperature becomes high or low from that state.

In the simulation, the maximum amount of stress generated in the wiring material when the temperature was changed to 90 ° C. and −40 ° C. was obtained by setting the strain amount along the longitudinal direction of the wiring material in the solar cell module at room temperature to 0 μm. When the strain amount at room temperature of the wiring material is 0 μm and the environmental temperature changes from 90 μC to 90 ° C., the strain amount of the wiring material becomes + α. When the ambient temperature changes from room temperature to −40 ° C., the strain amount of the wiring material becomes −α. Α indicating the strain amount is, for example, 0 to 200 μm.

The horizontal axis in FIG. 5 is the strain amount of the wiring material, and takes 0 μm corresponding to room temperature, + α corresponding to 90 ° C., and −α corresponding to −40 ° C. The vertical axis relatively shows the maximum stress value of the wiring material in the simulation. In the wiring material, the maximum stress occurs at the boundary between the first portion and the intermediate portion and the boundary between the first portion and the intermediate portion. The four data shown in FIG. 5 correspond to (a), (b), (c), and (d) in FIG.

From the result of FIG. 5, it can be seen that the stress generated in the wiring material in the molding shape of the wiring member 13 in FIG. 4C is smaller than in other molding shapes. 4 (a) and 4 (b), in which the molding is configured with only a straight portion, the maximum stress value is larger in the range of about 1.5 to 2 times than (c). Although the wiring material of FIG. 4D is not as large as (c), the maximum stress value is smaller than those of (a) and (b).

As described above, the first non-contact portion 16 and the second non-contact portion 19 are provided, and the three

tangents

40, 41, and 42 are in a predetermined angular relationship, thereby reducing the stress generated in the wiring material. Reducing stress generated in the wiring material is particularly effective when thin

solar cells

11 and 12 are employed. When the

solar cells

11 and 12 are thinned, they are easily affected by the stress of the wiring material. For example, the

solar cells

11 and 12 are more likely to break due to the influence of the stress of the wiring material. When the

solar cells

11 and 12 thinner than the wiring material are used, the possibility of the

solar cells

11 and 12 being cracked can be reduced by using the wiring material having a predetermined angular relationship between the three

tangents

40, 41 and 42. it can.

10 solar cell module, 11, 12 solar cell, 13 wiring material, 14 first part, 15 first contact part, 16 first non-contact part, 17 second part, 18 second contact part, 19 second non-contact part , 20 middle part, 21, 22 sealing material, 23 (receiving surface side) protective member, 24 (back side) protective member, 25, 26 frame, 30, 32 separation start point, 31, 33 (curved) vertex , 37, 38, 39 (the point of inflection of the way of bending), 40, 41, 42 tangent.

Claims

A first contact portion connected in contact with a light receiving surface of one solar cell, and extends from the first contact portion toward the other solar cell adjacent to the one solar cell, and is separated from the light receiving surface to receive the light. A first portion having a first non-contact portion that curves toward the upper surface;
A second non-contact portion that contacts and is connected to the back surface of the other solar cell, and extends from the second contact portion to the outside of the one solar cell and is curved away from the back surface and curved downward. A second portion having a contact portion;
An intermediate portion bent from the apex of the curvature of the first non-contact portion toward the back surface of the other solar cell and connected to the apex of the curvature of the second non-contact portion;
A wiring material including
The wiring material of a solar cell module, wherein the wiring material is thicker than the solar cell.
In the wiring material of the solar cell module according to claim 1,
A first tangent that is a tangent of a point that becomes an inflection point of the bending direction with respect to the first non-contact portion;
A medium indirect line that is a tangent to a point that becomes an inflection point of the bending direction with respect to the intermediate portion;
A second tangent that is a tangent of a point that becomes an inflection point of the bending direction with respect to the second non-contact portion;
about,
The wiring material for a solar cell module, wherein an angle formed by the first tangent and the medium indirect line is an obtuse angle, and an angle formed by the second tangent and the medium indirect line is an obtuse angle.
In the wiring material of the solar cell module according to claim 2,
The angle formed by the first tangent and the intermediate indirect line is determined by the inflection point of the first non-contact portion, the intersection of the first tangent and the intermediate indirect line, and the inflection point of the intermediate portion. The angle to make,
The angle formed by the second tangent and the intermediate indirect line is determined by the inflection point of the second non-contact portion, the intersection of the second tangent and the intermediate indirect line, and the inflection point of the intermediate portion. The wiring material of the solar cell module, which is the angle formed.
In the wiring material of the solar cell module according to claim 3,
The wiring material of a solar cell module, wherein the first non-contact part, the intermediate part, and the second non-contact part are formed so as not to have a linear shape.
In the wiring material of the solar cell module according to any one of claims 1 to 4,
The position of the apex of the curve of the first non-contact portion corresponds to the position of the end of the light receiving surface of the one solar cell,
The wiring material of the solar cell module, wherein the position of the top of the second non-contact portion corresponds to the position of the end of the back surface of the other solar cell.
The wiring material of the solar cell module according to any one of claims 1 to 5,
A solar cell module comprising a plurality of solar cells connected by the wiring member.
To connect the light receiving surface of one solar cell and the back surface of the other solar cell,
A first contact portion that is connected in contact with the light receiving surface of the one solar cell, and extends from the first contact portion toward the other solar cell adjacent to the one solar cell and is separated from the light receiving surface. A first portion having a first non-contact portion that curves upward toward the light receiving surface;
A second contact portion that contacts and is connected to the back surface of the other solar cell, and extends from the second contact portion toward the one solar cell and is curved away from the back surface and curved downward. A second part having two non-contact parts;
An intermediate portion that is bent from the top of the curve of the first non-contact portion toward the back surface of the other solar cell and connected to the top of the curve of the second non-contact portion. Mold the wiring material thicker than the battery thickness,
Connecting the first contact portion of the wiring member to the light receiving surface of the one solar cell;
Connecting the second contact portion of the wiring member to the back surface of the other solar cell;
A light-receiving surface side sealing material is disposed on the light-receiving surface side of the solar cell, a back-surface side sealing material is disposed on the back surface side of the solar cell,
A method for manufacturing a solar cell module, comprising: a light-receiving surface side protective member disposed outside the light-receiving surface side sealing material; and a back surface side protective member disposed outside the back-surface side sealing material.
In the manufacturing method of the solar cell module according to claim 7,
The wiring member includes a first tangent line that is a point that becomes an inflection point of the bending direction with respect to the first non-contact portion, and a medium indirect line that is a tangent line of the point that becomes an inflection point of the bending direction with respect to the intermediate portion. The angle formed by the second intangible line is an obtuse angle, and the angle formed by the second tangent line that is a tangent point of the bending point of the second non-contact portion and the intermediate indirect line is an obtuse angle. Manufacturing method of solar cell module.
In the manufacturing method of the solar cell module according to claim 8,
The method for manufacturing a solar cell module, wherein the first non-contact portion, the intermediate portion, and the second non-contact portion are formed so as not to have a linear shape.