JP2009194114A - Solar cell module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar cell module which is lightweight, and has high moisture resistance and sufficient mechanical strength. <P>SOLUTION: The solar cell module 1 comprises a solar cell sub-module 2 having solar cell devices formed on a glass substrate; and a filling material 4 filled on a light-receiving surface side sealing material 31, on a back surface side sealing material 32, between the light-receiving side sealing material 31 and the solar cell sub-module 2, and between the light-receiving surface side sealing material 31 and the back surface side sealing material 32 in the vicinity of an end of the solar cell sub-module 2. The solar cell sub-module 2 is, at the light receiving surface side, bonded to the light-receiving surface side sealing material 31 via the filling material 4 on the light-receiving surface side, is directly bonded to the back surface side sealing material 32 on the back surface side and is bonded and held between the light-receiving surface side sealing material 31 and the back surface side sealing material 32. The filling material 4 is filled so as to be gradually thinned from the end of the solar cell sub-module 2 toward the ends of the light-receiving surface side sealing material 31 and the back surface side sealing material 32, and the light-receiving surface side sealing material 31 is directly connected to the back surface side sealing material 32 in the peripheral edge. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a solar cell module in which a solar cell device is sealed with a predetermined sealing material.

  In recent years, along with international environmental protection efforts and improvements in photoelectric conversion efficiency, solar cell modules that receive sunlight and generate electricity are not only used as general power generators, but also as calculators and chargers for mobile phones. As a power source for road traffic signs and street lamps, it is used for various purposes in various places.

  There are various specifications or configurations of solar cell modules that are required depending on the application, but since it is necessary to receive sunlight, etc. for power generation, it is assumed that moisture from the outside will be used in harsh outdoor environments. It is essential to have sufficient weather resistance such as preventing intrusion.

  On the other hand, in the case of reducing the weight and size of the solar cell module and further reducing the manufacturing cost, the structures that can be adopted are limited, and severe conditions are also imposed on the members used for the solar cell module. Thus, it is difficult to ensure sufficient weather resistance.

In this respect, as a module for reducing the weight and reducing the cost, in Patent Document 1, a solar cell sandwiched between two polycarbonate plates is bonded by EVA (ethylene vinyl acetate copolymer) to which an organic oxide is added. A retained solar cell module has been proposed.
Patent Document 2 proposes a solar cell module in which solar cells are sandwiched between sheets made of EVA resin and spacers are provided and laminated on the entire surface including the end portions.
Patent Document 3 proposes a solar cell module in which a resin film is used as a surface protection sheet of a solar cell element and a peripheral end portion is sealed with a spacer.
Moreover, in patent document 4, it arrange | positions sequentially so that a light-receiving surface side film, a light-receiving surface side filler, a back surface side filler, and a back surface film may be piled up, and the said light receiving surface side film and the said back surface film A solar cell module in which the peripheral edge portion is heat-sealed has been proposed.
Moreover, in patent document 5, a front cover is arrange | positioned at the light-receiving surface side of a photovoltaic cell, a back cover is distribute | arranged to the opposite surface side, and a filling resin layer is provided between each cover and photovoltaic cell, The said photovoltaic cell A solar cell module in which a front cover and a back cover are joined at the periphery of the module has been proposed.

JP 2005-113077 A JP 2006-156873 A JP 2006-165434 A JP 2006-86390 A JP 2002-118276 A

However, in the solar cell module described in Patent Document 1, EVA is exposed from between the polycarbonate plates sandwiching the solar cells on the side end face, and moisture penetrates from the exposed EVA portion and corrodes the solar cells. There is a problem that it ends up.
In addition, in the solar cell modules described in Patent Document 2 and Patent Document 3, in both cases, moisture is prevented from entering from the outside by disposing spacers on the side end faces. There is a problem that a manufacturing process is required, and moisture is infiltrated between the sheet and the spacer unless measures are taken to increase the adhesion between the sheet covering the solar battery cell (solar battery element) and the spacer. There is.
Moreover, in the solar cell module of patent document 4 and patent document 5, since all have taken the structure which pinched | interposed the photovoltaic cell (solar cell element) with the filler (filling resin layer), a solar cell module is thick. In addition, since much filler (filled resin layer) is used, the cost increases. On the other hand, when the amount of the filler (filled resin layer) is reduced, there arises a problem that the mechanical strength and durability of the entire solar cell module cannot be maintained.

  Accordingly, an object of the present invention is to provide a solar cell module that is lightweight, has high moisture resistance, and has sufficient mechanical strength.

In order to achieve the above object, a solar cell module according to the present invention comprises a solar cell submodule in which a solar cell device is formed on a glass substrate and a predetermined resin material, and the light receiving surface side of the solar cell submodule A light-receiving surface side sealing material to be coated; a back-side sealing material that is made of a predetermined resin material and covers a back surface side opposite to the light-receiving surface of the solar cell submodule; and the light-receiving surface side sealing material A solar cell module comprising: a filler filled between the light-receiving surface side sealing material and the back surface side sealing material between the solar cell sub-modules and in the vicinity of an end of the solar cell sub-module. The planar size of the light receiving surface side sealing material and the back surface side sealing material is larger than the planar size of the solar cell submodule, and the solar cell submodule is placed on the light receiving surface side. Adhering to the light-receiving surface side sealing material by the filler, and adhering to the back side sealing material by adhesive or thermal fusion applied to the surface of the back side sealing material on the back side The light receiving surface side sealing material and the back surface side sealing material are bonded and held, and the filler is connected from the end of the solar cell submodule to the light receiving surface side sealing material and the back surface side sealing material. The light receiving surface side sealing material and the back surface side sealing material are directly bonded to each other at the peripheral edge, thereby sealing the solar cell submodule. It is characterized by.
Thereby, the filler is not exposed at the side end surface of the solar cell module, and the solar cell module is included from the side end surface of the solar cell submodule including the portion where the light receiving surface side sealing material and the back surface side sealing material are bonded. Since there is a certain distance to the side end face, moisture is difficult to enter and high moisture resistance is obtained.
Further, in addition to the peripheral portion provided with a predetermined length of a portion where the light receiving surface side sealing material and the back surface side sealing material are bonded, the light receiving surface side sealing material and the back surface side sealing material Since it is made of a resin material, it is hard to break even if dropped during use.

The solar cell device may be a CIS thin film solar cell device.
As a result, power generation is possible even when a part of the solar cell device is shaded.

The light receiving surface side sealing material and the back surface side sealing material may be made of a fluororesin.
The fluororesin has high weather resistance with respect to a photodecomposition action by sunlight or the like, an expansion / contraction action by a change in temperature, and the like.
Thereby, the weather resistance of a solar cell module can be improved more and the surface is hard to be damaged.

The filler may be made of EVA.
Note that EVA is an ethylene vinyl acetate copolymer, which is light in weight because of its low specific gravity, and has high flexibility and elasticity.
Thereby, a solar cell submodule, a light-receiving surface side sealing material, and a back surface side sealing material are adhere | attached firmly. In addition, the solar cell module can be reduced in weight, and the impact during use can be absorbed.

Further, the light receiving surface side sealing material or the back surface side sealing material may have an embossed surface.
As a result, cushioning properties can be obtained, the beauty is good, and the touch is good.

Moreover, the edge of the said light-receiving surface side sealing material and the said back surface side sealing material is good also as what is formed in the chamfering shape where the corner | angular part was rounded.
Thereby, it is possible to prevent the corner portion from being injured when handling the solar cell module, and it is safe.

  According to the present invention, the solar cell module can be made lightweight. In addition, since the filler is not exposed on the side end face of the solar cell module and a certain length is secured from the side end face to the solar cell submodule, excellent moisture resistance can be provided.

Hereinafter, the solar cell module according to the first embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, a solar cell module 1 according to the present embodiment includes a solar cell submodule 2 that receives sunlight and generates power, and a seal that seals the entire solar cell submodule 2. It consists of material 3.
Then, as shown in FIG. 2, an external load and an electrical load are electrically connected to the ribbon wire 22 for outputting the electric power generated in the solar cell submodule 2 to the outside through the mounting hole 33 provided in the sealing material 3. By attaching the external conducting wire 5 connected to, the electric power generated in the solar cell submodule 2 can be derived to an external load.

The sealing material 3 is a protective sheet that seals the solar cell submodule 2 and prevents moisture inflow from the outside.
As shown in FIGS. 3 and 4, the sealing material 3 includes a light receiving surface side sealing material 31 that covers the light receiving surface side of the solar cell module 1, and a surface opposite to the light receiving surface (hereinafter “back surface”). And back surface side sealing material 32 covering.

  As shown in FIGS. 1 and 2, the light receiving surface side sealing material 31 and the back surface side sealing material 32 have a plane size larger than the plane size of the solar cell submodule 2, and the solar cell submodule 2. The entire plane can be covered.

Further, at least the back surface side sealing material 32 has an adhesive applied to the surface, and when the solar cell sub module 2 is sandwiched between the light receiving surface side sealing material 31 and subjected to a lamination process, the solar cell sub module 2 and the light receiving surface side sealing material 31 are directly bonded.
In addition, the back surface side sealing material 32 may be bonded to the solar cell submodule 2 or the light receiving surface side sealing material 31 by heat fusion. In the heat fusion, the back side sealing material 32 is heated to melt its surface and then bonded to the solar cell submodule 2 or the light receiving surface side sealing material 32 to be bonded and then cooled. Can be made.

Moreover, the plane size of the light-receiving surface side sealing material 31 and the back surface side sealing material 32 is larger than the plane size of the sheet-like filler 4 before the lamination process. Therefore, when the solar cell submodule 2 and the filler 4 are sandwiched between the light-receiving surface side sealing material 31 and the back surface side sealing material 32 and laminated, as shown in FIG. 3 and FIG. The hot-melt filler 4 spreads out gradually from the end of the solar cell submodule 2 toward the outside.
Thereby, as shown in FIGS. 3 and 4, the solar cell module 1 subjected to the laminating process has the filler 4 filled between the light-receiving surface side sealing material 31 and the solar cell submodule 2. The battery submodule 2 is filled without a gap so that it gradually becomes thinner from the end to the outside. Further, the light-receiving surface side sealing material 31 and the back surface side sealing material 32 are integrally bonded at the peripheral edge portion S by an adhesive applied to the surface of the back surface side sealing material 32 or heat fusion. Yes.

Further, as shown in FIGS. 2 and 4, the sealing material 3 is provided with a mounting hole 33 in the back surface side sealing material 32 in order to connect the external conductor 5 connected to the external load to the solar cell submodule 2. It has been. The attachment hole 33 is provided at a position covering the ribbon wire 22 of the solar cell submodule 2, and the ribbon wire 22 is exposed from the attachment hole 33.
Then, as shown in FIG. 5, the external conductor 5 is attached to the ribbon wire 22 by the solder 6 through the attachment hole 33 that exposes only the ribbon wire 22 having a predetermined width. Electric power is derived.

For such a sealing material 3, for example, a thermoplastic resin having translucency and capable of being thermally fused can be used. Examples of such a material include a fluororesin material. As specific examples, Aflex (registered trademark, manufactured by Asahi Glass Co., Ltd.), Tefzel (registered trademark, manufactured by DuPont), Tedlar (registered trademark, manufactured by DuPont), Serel (registered trademark, manufactured by Kureha Co., Ltd.) ), KFC film (registered trademark, manufactured by Kureha Co., Ltd.) or the like.
In addition, a PET (polyethylene terephthalate) film in which an adhesive that can be bonded in a hot-melt state is applied to the surface can also be used.
The light-receiving surface side sealing material 31 and the back surface side sealing material 32 made of these materials can be made to be the sealing material 3 bonded at the peripheral edge S by heating and pressurizing during the laminating process. .

  Further, the thickness of the light-receiving surface side sealing material 31 and the back surface side sealing material 32 is preferably about 50 to 200 μm from the viewpoint of realizing durability and weight reduction during use.

The filler 4 is provided between the solar cell submodule 2 and the light receiving surface side sealing material 31 and between the light receiving surface side sealing material 31 and the back surface side sealing material 32 in the vicinity of the end of the solar cell submodule 2. They are filled without any gaps and are bonded and held together. In addition, the filler 4 protects the thin film formed on the light receiving surface side of the solar cell submodule 2 from heat shock and moisture intrusion to enhance durability, and reduces the external force such as impact to reduce the thin film. Prevents scratches and increases mechanical strength. Furthermore, the aesthetic appearance is improved. On the other hand, the solar cell module 1 in the present embodiment is not filled with the filler 4 between the back side sealing material 32 and the solar cell submodule 2. This is because only the glass substrate appears on the back side of the solar cell sub-module 2, and the insulation from the thin film formed on the light receiving surface side is maintained, so it is necessary to deal with moisture on the light receiving surface side. This is possible because the durability against external force and the like is sufficiently secured, and the mechanical strength is maintained by the solar cell submodule 2 including a glass substrate.
The filler 4 melts and spreads by being pressed while being heated while sandwiched between the solar cell submodule 2 and the light-receiving surface side sealing material 31, fills the gap, and The sealing material 3 can be adhered.
As a material of the filler 4, for example, sheet-like EVA (ethylene vinyl acetate copolymer) can be used.

  The solar cell submodule 2 is constituted by a so-called CIS-based thin film solar cell device, and as shown in FIGS. 6 and 7, a base 21 that receives sunlight and generates electric power, and a ribbon wire attached to the base 21 22.

  As shown in FIG. 8, the base 21 is formed on a glass substrate 2A made of blue plate glass or the like, a metal back electrode layer 2B made of a metal such as molybdenum (Mo), a p-type CIS light absorption layer 2C, or a high resistance buffer layer 2D. A pn heterojunction device having a substrate structure in which n-type window layers (transparent conductive films) 2E are sequentially laminated is formed.

Here, the p-type CIS light absorbing layer 2C is a thin film having a thickness of 1 to 3 μm and having a p-type conductivity and a group I-III-VI group ₂ chalcopyrite. For example, CuInSe ₂ , Cu (InGa) Se ₂ , a multi-component compound semiconductor thin film such as Cu (InGa) (SSe) ₂ . The p-type CIS light absorption layer 2C includes, in addition, a selenide CIS light absorption layer, a sulfide CIS light absorption layer, and a selenide / sulfide CIS light absorption layer, and the selenide CIS light absorption layer. The light absorption layer is made of CuInSe ₂ , Cu (InGa) Se ₂ or CuGaSe ₂ , and the sulfide-based CIS light absorption layer is made of CuInS ₂ , Cu (InGa) S ₂ , CuGaS ₂ , The sulfide-based CIS-based light absorption layer includes CuIn (SSe) ₂ , Cu (InGa) (SSe) ₂ , CuGa (SSe) ₂ , and CuIn (SSe) ₂ as a surface layer. with _{CuInSe 2, CuIn (SSe) 2} Cu (InGa) having as a surface layer of Se _2, CuIn (SSe) Cu with ₂ as a surface layer _{(InGa) (SSe) 2,} Cu CuGaSe ₂ having a _{CuGaSe 2, Cu (InGa) (} SSe) Cu with ₂ as a surface layer _{(InGa) Se 2, Cu (} InGa) (SSe) 2 of the surface layer with n a (SSe) ₂ as the surface layer, CuGa (SSe) is CuGaSe ₂ with ₂ Cu (InGa) Se ₂ or CuGa (SSe) ₂ as a surface layer with a surface layer.
The p-type CIS light absorption layer 2C is formed by a selenization / sulfurization method or a multi-source co-evaporation method.

The ribbon wire 22 is made of a strip-shaped metal having conductivity, and is a lead for leading the electric power generated in the base 21 to an external load. The ribbon wire 22 is soldered to an extraction electrode (not shown) formed on the base 21 in order to output the generated electric power to the outside, and goes around from the edge portion on the short side of the base 21 to the back surface. By connecting the ribbon wire 22 and the external conductor 5 on the back side, the electric power generated in the base body 21 is led out to the outside.
In addition, as shown in FIG. 5, when the external conductor 5 is attached to the ribbon wire 22 with the solder 6 according to the thickness or diameter of the external conductor 5, the external conductor 5 is connected to the ribbon wire 22 as shown in FIG. 5. It has a width that does not protrude.

Next, the manufacturing process of the solar cell module 1 according to this embodiment will be described.
The solar cell module 1 includes a step of laminating the light-receiving surface side sealing material 31, the filler 4, the solar cell submodule 2, and the back surface side sealing material 32 and laminating the sealing material 3 (back side sealing). It is manufactured through a process of providing the attachment hole 33 in the stopper material 32).

In the laminating process, first, as shown in FIG. 9, a sheet-like filler 4 having substantially the same size as the solar cell submodule 2 is placed on the light-receiving surface side sealing material 31, and a predetermined film forming process is performed. The produced solar cell sub-module 2 is placed so that the light-receiving surface side is in contact with the filler 4, and a back-side sealing material 32 is further placed thereon to laminate each member.
And each member laminated | stacked as mentioned above is installed in a lamination processing apparatus, The said lamination processing apparatus is pressure-reduced, and it heats more than the softening point of the filler 4. Furthermore, by pressing in the state where the above-described members are laminated, the hot-melt filler 4 is placed between the light-receiving surface side sealing material 31 and the solar cell submodule 2 and in the vicinity of the end of the solar cell submodule 2. The light receiving surface side sealing material 31 and the back surface side sealing material 32 spread without gaps, and the members are integrally bonded by the filler 4. Further, between the solar cell submodule 2 and the back side sealing material 32, when a resin material that can be heat-sealed is used as the sealing material 3, the surface of the back side sealing material 32 is melted by heat. When the two members are bonded together and the adhesive is applied to the surface of the sealing material 3, the two members are bonded through the adhesive melted by heat.

Moreover, since the light-receiving surface side sealing material 31 and the back surface side sealing material 32 are larger than the sheet-like filler 4, as shown in FIG. 3 or FIG. 4, from the end of the solar cell submodule 2 to the outside. The filler 4 gradually becomes thinner toward the peripheral portion S, and the light-receiving surface side sealing material 31 and the back surface side sealing material 32 are directly bonded together. When a resin material that can be heat-sealed is used as the sealing material 3, the surfaces of the light-receiving surface side sealing material 31 and the back surface side sealing material 32 are melted by heat and bonded to each other. In the case where an adhesive is applied to the surface 3, the light-receiving surface side sealing material 31 and the back surface side sealing material 32 are bonded via an adhesive melted by heat. As a result, the filler 4 is not exposed on the side end surface of the peripheral end portion S of the sealing material 3.
As described above, when the temperature is lowered in a state where the respective members are bonded, the filler 4 is cured and the laminating process is completed.

  In the laminating process, not only between the light receiving surface side sealing material 31 and the solar cell submodule 2 but also between the solar cell submodule 2 and the back surface side sealing material 32, the sheet-like filler 4 is applied. Each member can be bonded by sandwiching.

When the lamination process is completed as described above, the attachment hole 33 for attaching the external conductor 5 is formed in the back side sealing material 32. As shown in FIG. 10, the attachment hole 33 is formed on the back surface side sealing material 32 on the ribbon wire 22 so that only the ribbon wire 22 is exposed. At this time, the diameter of the attachment hole 33 is formed to be smaller than the lateral width of the ribbon wire 22.
In addition, the mounting hole 32 is formed by, for example, bringing a heating rod or the like heated above the melting point of the sealing material 3 to melt the sealing material 3 at the position.
As a result, an attachment hole 33 is provided, and, as shown in FIG. 5, the external conductor 5 is attached to the ribbon wire 22 by the solder 6 via the attachment hole 33, so that electric power can be supplied from the solar cell submodule 2 to the external load. Can be supplied.

  The solar cell module 1 completed by the above steps has a small number of parts and is light in weight, so that the weight is reduced as a whole. In particular, the space between the solar cell submodule 2 and the light-receiving surface side sealing material 31 is adhered by the filler 4, and the space between the solar cell submodule 2 and the back surface side sealing material 32 is not dependent on the filler and may be an adhesive or By adhering the surface of the back side sealing material 32 by heat fusion by melting, the filler 4 to be used is reduced, and weight reduction and cost reduction are realized. On the other hand, since the solar cell submodule 2 is formed by forming a thin film on the glass substrate 2A, the mechanical strength of the solar cell module 1 itself is maintained by the glass substrate 2A, and the insulating property from the thin film on the light receiving surface side is maintained. Is also secured and does not impair durability in use. Moreover, since the filler 4 is not exposed to the side end face and a certain length is secured from the side end face to the solar cell submodule 2, it has excellent moisture resistance.

  In the implementation of the present invention, the sealing material 3 may have an embossed surface. The processing method is not particularly limited. However, according to a general method, the light-receiving surface side sealing material 31 or the back surface side sealing material 32 is passed between a rubber roll and an unevenly processed metal roll. The surface is embossed by pressing.

  In the present invention, a CIS-based thin film solar cell constituting a pn heterojunction device having a substrate structure is used as the solar cell submodule 2, but the present invention is not limited to this, and the superstrate structure and other compounds are used. The solar cell module according to the present invention can also be configured by using the solar cell system as long as the mechanical strength can be maintained using the glass substrate.

  Moreover, the solar cell module 1 can also be set as the device which can electrically store by attaching an electric double layer capacitor integrally.

  In the present embodiment, the sealing material 3 for sealing the solar cell module 1 has a plane size larger than the plane size of the solar cell submodule 2, and the plane of the rectangular solar cell submodule 2. In the solar cell module 7 according to another embodiment of the present invention, the corner portion of the sealing material 8 is rounded and chamfered as shown in FIG. It is good also as a shape.

This solar cell module 7 may be formed by sealing the solar cell submodule 2 with a sealing material 8 having a corner portion that is rounded in advance, or the solar cell module 1 using the sealing material 3. It is good also as what cuts off the corner | angular part of the sealing material 3 roundly.
As a result, the corner portion is rounded, and the corner portion can be prevented from being injured when handled, which is safe.

It is the external appearance perspective view which showed the front side of the solar cell module which concerns on embodiment of this invention. It is the external appearance perspective view which showed the back side of the solar cell module which concerns on this embodiment. It is A-A 'sectional drawing which showed the cross section of the solar cell module which concerns on this embodiment. It is B-B 'sectional drawing which showed the cross section of the solar cell module which concerns on this embodiment. It is the elements on larger scale which showed C part of the solar cell module which concerns on this embodiment. It is the external appearance perspective view which showed the front side of the solar cell submodule which concerns on this embodiment. It is the external appearance perspective view which showed the back side of the solar cell submodule which concerns on this embodiment. It is the schematic diagram which showed the laminated structure of the base | substrate which concerns on this embodiment. It is the schematic diagram which showed the lamination | stacking state in the manufacturing process of the solar cell module which concerns on this embodiment. In the solar cell module which concerns on this embodiment, it is the external appearance perspective view which showed the state which provided the attachment hole which can attach an external conducting wire. It is the external appearance perspective view which showed the solar cell module which concerns on another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solar cell module 2 Solar cell submodule 21 Base | substrate 22 Ribbon wire 2A Glass substrate 2B Metal back electrode layer 2C p-type CIS type light absorption layer 2D High resistance buffer layer 2E n-type window layer (transparent conductive film layer)
DESCRIPTION OF SYMBOLS 3 Sealing material 31 Light-receiving surface side sealing material 32 Back surface side sealing material 33 Mounting hole 4 Filler 5 External conductor 6 Solder 7 Solar cell module 8 Sealing material S Peripheral part

Claims (5)

A solar cell submodule in which a solar cell device is formed on a glass substrate;
A light-receiving surface side sealing material that is made of a predetermined resin material and covers the light-receiving surface side of the solar cell submodule,
A back side sealing material that is made of a predetermined resin material and covers a back side that is opposite to the light receiving surface of the solar cell submodule;
A filler filled between the light receiving surface side sealing material and the solar cell submodule and between the light receiving surface side sealing material and the back surface side sealing material in the vicinity of the end of the solar cell submodule; A solar cell module comprising:
The plane size of the light receiving surface side sealing material and the back side sealing material is larger than the plane size of the solar cell submodule,
The solar cell sub-module is bonded to the light-receiving surface side sealing material by the filler on the light-receiving surface side, and on the back side, an adhesive or heat fusion applied to the surface of the back-side sealing material. By directly adhering to the back side sealing material, the adhesive holding between the light receiving surface side sealing material and the back side sealing material,
The filler is gradually and gradually filled from the end of the solar cell submodule toward the end of the light receiving surface side sealing material and the back side sealing material, and the light receiving surface side sealing material and The solar cell submodule is sealed by directly adhering the back side sealing material at the periphery.
A solar cell module characterized by that. The solar cell device is a CIS-based thin film solar cell device.
The solar cell module according to claim 1. The filler is made of EVA.
The solar cell module according to claim 1 or 2. The light receiving surface side sealing material or the back surface side sealing material is embossed on the surface,
The solar cell module according to any one of claims 1 to 3. The edges of the light receiving surface side sealing material and the back surface side sealing material are formed in a chamfered shape with rounded corners.
The solar cell module according to any one of claims 1 to 4.

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