JPWO2013132619A1 - Solar cell module manufacturing method and solar cell module - Google Patents

Abstract

A method capable of producing a solar cell module having improved photoelectric conversion efficiency is provided. The laminated body 10 in which the light-receiving surface side protective member 11, the transparent resin sheet 12, the solar cell 13, the colored resin sheet 14, and the back surface side protective member 15 are laminated in this order is produced. On the back surface side protection member 15 of the laminated body 10, the thick part 20a which covers at least one part of the area | region in which the solar cell 13 is not provided, and the area | region in which the solar cell was provided are covered, and the thick part 20a In a state where the plate 20 having the thinner thin portion 20b is arranged, the laminate 10 is pressed while being heated.

Description

  The present invention relates to a method for manufacturing a solar cell module and a solar cell module.

  Patent Document 1 describes a solar cell module including a back junction solar cell.

JP 2009-266848 A

There is a desire to further improve the photoelectric conversion efficiency of a solar cell module including a back junction solar cell.
The main object of the present invention is to provide a method capable of producing a solar cell module having improved photoelectric conversion efficiency.

  In the manufacturing method of the solar cell module according to the present invention, a light-receiving surface side protection member, a transparent resin sheet, a solar cell, a colored resin sheet, and a back surface side protection member are stacked in this order. . A thick part covering at least a part of the region where the solar cell is not provided on the back surface side protective member of the laminate, and a thin part covering the region where the solar cell is provided and being thinner than the thick part The laminated body is pressed while being heated with a plate having

  The solar cell module according to the present invention includes a solar cell, a light receiving surface side protective member, a back surface side protective member, a transparent filler layer, and a colored filler layer. The light receiving surface side protection member is arranged on the light receiving surface side of the solar cell. The back surface side protection member is arranged on the back surface side of the solar cell. The transparent filler layer is disposed between the solar cell and the light receiving surface side protection member. The colored filler layer is disposed between the solar cell and the back surface side protective member. The colored filler layer is located on at least a part of the portion located in the non-power generation region of the light receiving surface of the solar cell.

  ADVANTAGE OF THE INVENTION According to this invention, the method which can manufacture the solar cell module which has the improved photoelectric conversion efficiency can be provided.

FIG. 1 is a schematic exploded cross-sectional view of a laminate produced in one embodiment of the present invention. FIG. 2 is a schematic plan view of a laminate and a plate produced in one embodiment of the present invention. In FIG. 2, although the area | region in which the board is provided is attached | subjected, the area | region where the hatching was attached does not necessarily show the cross section. FIG. 3 is a schematic cross-sectional view of a solar cell module manufactured in an embodiment of the present invention. FIG. 4 is a schematic rear view for explaining the relationship between the colored filler layer and the solar cell in the solar cell module manufactured in one embodiment of the present invention. In FIG. 4, hatching is added to the region where the colored filler layer is provided, but the hatched region does not indicate a cross section. In FIG. 4, drawing of the light-receiving surface side protection member and the transparent filler layer is omitted. FIG. 5 is a schematic plan view of a laminate and a plate manufactured in a modified example. In FIG. 5, hatching is added to the area where the plate is provided, but the hatched area does not indicate a cross section. FIG. 6 is a schematic plan view for explaining the relationship between the colored filler layer and the solar cell in the solar cell module manufactured in the modified example. In FIG. 6, hatching is added to a region where the colored filler layer is provided, but the hatched region does not indicate a cross section. In FIG. 6, drawing of the light-receiving surface side protection member and the transparent filler layer is omitted. FIG. 7 is a schematic exploded cross-sectional view of a laminate produced in another modification. FIG. 8 is a schematic plan view of a laminate and a plate manufactured in another modification. In FIG. 8, although the area | region where the thick part of the board is provided is attached | subjected, the area | region which attached | subjected hatching does not necessarily show the cross section.

  Hereinafter, an example of the preferable form which implemented this invention is demonstrated. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

  Moreover, in each drawing referred in embodiment etc., the member which has a substantially the same function shall be referred with the same code | symbol. The drawings referred to in the embodiments and the like are schematically described, and the ratio of the dimensions of the objects drawn in the drawings may be different from the ratio of the dimensions of the actual objects. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.

  A method for manufacturing the solar cell module 1 shown in FIGS. 3 and 4 will be described with reference mainly to FIGS. 1 and 2.

  First, the laminated body 10 shown in FIG. 1 is produced. Specifically, the light-receiving surface side protection member 11, the transparent resin sheet 12, the solar cell 13, the colored resin sheet 14, and the back surface side protection member 15 are laminated in this order to produce the laminated body 10. To do. But the laminated body 10 may be produced by laminating | stacking the back surface side protection member 15, the colored resin sheet 14, the solar cell 13, the transparent resin sheet 12, and the light-receiving surface side protection member 11 in this order. . That is, when the laminate 10 is manufactured, the order of lamination is not particularly limited.

  The light-receiving surface side protection member 11 can be composed of, for example, a glass plate, a ceramic plate, or a resin plate. The transparent resin sheet 12 can be composed of a resin sheet that does not substantially contain a pigment or a dye. The transparent resin sheet 12 can be composed of, for example, a crosslinkable resin such as ethylene / vinyl acetate copolymer (EVA) or a non-crosslinkable resin such as polyolefin.

  The solar cell 13 can be composed of, for example, a crystalline silicon solar cell, a thin film solar cell, or the like. Here, a plurality of solar cells 13 are arranged at intervals. Specifically, a plurality of solar cells 13 are arranged in a matrix. The plurality of solar cells 13 are electrically connected by a wiring material (not shown). However, only one solar cell 13 may be provided.

  The solar cell 13 may have, for example, a rectangular shape, a polygonal shape, or a rectangular shape whose corners are chamfered or R-chamfered.

  The colored resin sheet 14 can be composed of a resin sheet containing at least one of a pigment and a dye. Although the color tone of the colored resin sheet 14 is not specifically limited, For example, it is preferable that it is white. For example, the colored resin sheet 14 is preferably composed of a crosslinkable resin such as ethylene / vinyl acetate copolymer (EVA) containing titanium oxide particles, or a resin sheet made of non-crosslinkable resin such as polyolefin. The back surface side protection member 15 can be comprised by the resin sheet etc. which contain a resin sheet and a metal layer, for example.

  Next, the plate 20 is disposed on the laminate 10. As shown in FIG. 2, the plate 20 is disposed so as to cover at least a part of a region where the solar cell 13 is not provided. The plate 20 has an opening 21 that covers an area where the solar cell 13 is provided. Therefore, the plate 20 does not cover the region where the solar cell 13 is provided. Specifically, the plate 20 is disposed so as to cover at least a part of a region between the adjacent solar cells 13 and a region outside the solar cell 13 located on the outermost side. The plate 20 is disposed so as to surround each of the plurality of solar cells 13. The plate 20 is provided in a lattice shape.

  The constituent material of the plate 20 is not particularly limited. The plate 20 is preferably made of a synthetic material such as metal, resin, or ceramic.

  Next, in a state where the plate 20 is disposed on the laminate 10, the laminate 10 is pressed while being heated. Thereby, the solar cell module 1 shown in FIG.3 and FIG.4 can be completed.

  The solar cell module 1 has a plurality of solar cells 13. The plurality of solar cells 13 are arranged in a matrix at intervals. The plurality of solar cells 13 are electrically connected by a wiring material (not shown). On the light receiving surface side of the solar cell 13, the light receiving surface side protection member 11 is disposed. On the other hand, a back surface side protection member 15 is disposed on the back surface side of the solar cell 13. A transparent filler layer 12 a is disposed between the solar cell 13 and the light receiving surface side protection member 11. The transparent filler layer 12a is composed of the transparent resin sheet 12. A colored filler layer 14 a is disposed between the solar cell 13 and the back surface side protection member 15. The colored filler layer 14 a is composed of the colored resin sheet 14.

  As described above, the laminated body 10 is pressed while being heated in a state where the plate 20 covering at least a part of the region where the solar cell 13 is not provided is disposed on the back surface side protection member 15. For this reason, as shown in FIG. 3, the softened colored resin sheet 14 wraps around the light receiving surface side of the solar cell 13. Therefore, the colored filler layer 14a is located on at least a part of the portion located in the non-power generation area of the light receiving surface of the solar cell 13. Therefore, the incidence of light on the non-power generation region of the light receiving surface of the solar cell 13 can be suppressed. Therefore, at least part of the light that is about to enter the non-power generation area of the light receiving surface of the solar cell 13 can be guided to the power generation area of the solar cell 13. As a result, improved photoelectric conversion efficiency can be realized.

  From the viewpoint of obtaining a further improved photoelectric conversion efficiency, the colored resin sheet 14 wraps around a portion located in the non-power generation region of the light receiving surface of the solar cell 13, while on a portion located in the power generation region of the light receiving surface. It is preferable to press the laminated body 10 so as not to go around.

  From the viewpoint of obtaining a further improved photoelectric conversion efficiency, it is more preferable to arrange the plate 20 so as to cover at least a part of the region between the adjacent solar cells 13. By doing in this way, the colored resin sheet 14 is positioned on at least a part of the portion located in the non-power generation region of the light receiving surface of the solar cell 13 and adjacent to the other solar cell 13. To do. Therefore, at least a part of the light that is about to enter the non-power generation region of the light receiving surface of the solar cell 13 can be more efficiently guided to the power generation region of the solar cell 13.

  From the viewpoint of obtaining further improved photoelectric conversion efficiency, it is more preferable to arrange the plate 20 so as to surround the periphery of the solar cell 13. By doing in this way, the colored filler layer 14a is provided so as to surround the power generation area of the light receiving surface of the solar cell 13, and the coverage by the colored filler layer 14a in the non-power generation area provided outside the power generation area Becomes higher. As a result, at least part of the light that is about to enter the non-power generation area of the light receiving surface of the solar cell 13 can be more efficiently guided to the power generation area of the solar cell 13.

  In the present invention, the “power generation region” means a region that emits light when a voltage is applied to the solar cell. The “non-power generation region” means a region that does not emit light when a voltage is applied to the solar cell. In general, the light emitting region is constituted by a region where an electrode including a transparent conductive oxide layer is provided. The non-light emitting region is configured by a region where no electrode is provided including the transparent conductive oxide layer.

  Hereinafter, modifications of the embodiment will be described. In the following description, members having substantially the same functions as those of the above embodiment are referred to by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 5, in the present modification, the region where the wiring member 24 is not provided in the region where the wiring member 24 is provided, and the region where the wiring member 24 is not provided, between the adjacent solar cells 13. The plate 20 is arranged so that the plate 20 is positioned on the board. For this reason, as shown in FIG. 6, in the manufactured solar cell module 2, the non-power generation region of the solar cell 13 is not on the non-power generation region positioned along the side across which the wiring member 24 extends. The colored filler layer 14a is straddled over at least a part of the non-power generation region located along the side where the colored filler layer 14a is not substantially positioned and the wiring member 24 is not straddled. Even in such a configuration, improved photoelectric conversion efficiency can be obtained. Moreover, since there is no possibility that the wiring member 24 is damaged by the flow of the colored resin sheet 14, the solar cell module 2 having improved reliability can be obtained.

  In the above embodiment, an example in which the opening 21 is provided in the plate 20 has been described. However, the present invention is not limited to this. Instead of providing the opening 21 in the plate 20, specifically, as shown in FIG. 7, for example, a thick portion 20 a that covers at least a part of the region where the solar cell 13 is not provided on the plate 20, A region where the solar cell 13 is provided may be covered, and a thin portion 20b thinner than the thick portion 20a may be provided. Even in that case, the colored charging material layer 14a can be provided on at least a part of the portion located in the non-power generation region of the light receiving surface of the solar cell 13. Note that the plate 20 shown in FIG. 7 may be configured by laminating a plate having an opening and a plate having no opening.

  As shown in FIG. 8, the thick portion 20a is provided in a region surrounded by the corners of the four solar cells 13, and the thin portion 20b may be provided in other regions.

DESCRIPTION OF SYMBOLS 1, 2 ... Solar cell module 10 ... Laminated body 11 ... Light-receiving surface side protective member 12 ... Transparent resin sheet 12a ... Transparent filler layer 13 ... Solar cell 14 ... Colored resin sheet 14a ... Colored filler layer 15 ... Back surface side protective member 20 ... Plate 20a ... Thick part 20b ... Thin part 21 ... Opening 24 ... Wiring material

Claims (8)

A step of producing a laminate in which the light-receiving surface side protection member, the transparent resin sheet, the solar cell, the colored resin sheet, and the back surface side protection member are laminated in this order;
A thick part covering at least a part of a region where the solar cell is not provided on the back surface side protection member of the laminate, and a region where the solar cell is provided, the thick part In a state where a plate having a thinner thin part is arranged, a step of pressing while heating the laminate,
A method for manufacturing a solar cell module. In the manufacturing method of the solar cell module according to claim 1,
Between the transparent resin sheet and the colored resin sheet, a plurality of the solar cells are arranged at intervals,
The manufacturing method of a solar cell module which distributes the said board so that at least one part of the area | region between the said adjacent solar cells may be covered. In the manufacturing method of the solar cell module of Claim 2,
The manufacturing method of a solar cell module which distributes the said board so that the circumference | surroundings of the said solar cell may be enclosed. In the manufacturing method of the solar cell module as described in any one of Claims 1-3,
The said thin part is a manufacturing method of the solar cell module comprised by opening. In the manufacturing method of the solar cell module as described in any one of Claims 1-4,
A method for manufacturing a solar cell module, wherein the laminate is pressed so that the colored resin sheet wraps around the surface of the non-power generation region of the solar cell on the transparent resin sheet side. Solar cells,
A light-receiving surface side protective member disposed on the light-receiving surface side of the solar cell;
A back side protection member disposed on the back side of the solar cell;
A transparent filler layer disposed between the solar cell and the light-receiving surface side protection member;
A colored filler layer disposed between the solar cell and the back-side protection member;
With
The solar cell module, wherein the colored filler layer is located on at least a part of a portion located in a non-power generation region of the light receiving surface of the solar cell. The solar cell module according to claim 6, wherein
A plurality of the solar cells are spaced apart from each other,
A solar cell module in which the colored filler layer is located on at least a part of a portion located in a non-power generation region of the light receiving surface of the solar cell and adjacent to another solar cell. . The solar cell module according to claim 7, wherein
The solar cell module, wherein the colored filler layer surrounds a power generation region of the light receiving surface of the solar cell.

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