JP2004063673A - Method for manufacturing sealing film for solar cell and solar cell module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent the damage of a cell for a solar cell in a sealing process at the time of manufacturing a solar cell module. <P>SOLUTION: A sealing film 1 for a solar cell is formed with an opening 1A or a recessed part for housing a cell for a solar cell. A cell 14 for the solar cell is housed in the opening 1 or recessed part of the sealing film 1 for the solar cell so as to be sealed. <P>COPYRIGHT: (C)2004,JPO

Description

【００４８】
［開口付きＥＶＡフィルム］
１００ｍｍ×１００ｍｍの正方形の開口が縦横に等間隔で形成された、厚さ６００μｍの開口付きＥＶＡフィルム
【００４９】
［封止用ＥＶＡフィルム］
厚さ６００μｍの平膜状フィルム
図１に示す如く、厚さ３ｍｍのガラス基板１１の上に上記封止用ＥＶＡフィルム３及び開口付きＥＶＡフィルム１を積層し、開口付きＥＶＡフィルム１の開口１Ａに１００ｍｍ×１００ｍｍの正方形で厚さ４００μｍの太陽電池用セル（シリコン発電素子）１４を配置し、更に封止用ＥＶＡフィルム２及び厚さ３８ｍｍのフッ化ポリエチレンフィルムよりなるバックカバー１２を積層し、この積層体を真空ラミネーターを用いて、熱板温度１５０℃、脱気時間５分、プレス圧力１ａｔｍ、プレス時間４５分間加熱圧着し、ＥＶＡ樹脂を架橋することにより封止した。
【００５０】
このようにして、１００個の太陽電池を作製したところ、太陽電池用セルの破損は全く認められなかった。
【００５１】
実施例２
図２に示す方法により太陽電池モジュールの作製を行った。
【００５２】
まず、実施例１で用いたものと同配合のＥＶＡ樹脂組成物を用いて、下記構成の凹部付きＥＶＡフィルム及び封止用ＥＶＡフィルムを製造した。
【００５３】
［凹部付きＥＶＡフィルム］
深さ４００μｍで、１００ｍｍ×１００ｍｍの正方形の凹部が縦横に等間隔で形成された、総厚さ６００μｍの凹部付きＥＶＡフィルム
【００５４】
［封止用ＥＶＡフィルム］
厚さ６００μｍの平膜状フィルム
図２に示す如く、厚さ３ｍｍのガラス基板１１の上に上記凹部付きＥＶＡフィルム４を積層し、凹部付きＥＶＡフィルム４の凹部４Ａに１００ｍｍ×１００ｍｍの正方形で厚さ４００μｍの太陽電池用セル（シリコン発電素子）１４を配置し、更に封止用ＥＶＡフィルム２及び厚さ３８ｍｍのフッ化ポリエチレンフィルムよりなるバックカバー１２を積層し、この積層体を実施例１と同様の条件で加熱加圧して封止した。
【００５５】
このようにして、１００個の太陽電池モジュールを作製したところ、太陽電池用セルの破損は全く認められなかった。
【００５６】
比較例１
実施例１において、開口付きＥＶＡフィルムを用いなかったこと以外は同様にして太陽電池モジュールを作製したところ、１００個中、３個について太陽電池用セルの破損が認められた。
【００５７】
【発明の効果】
以上詳述した通り、本発明の太陽電池用封止膜及び太陽電池モジュールの製造方法によれば、太陽電池モジュール作製時の封止工程で太陽電池用セルに封止膜が押し付けられることによるセルの破損を確実に防止することができ、太陽電池を高い歩留りで効率的に作製することができる。
【図面の簡単な説明】
【図１】本発明の太陽電池用封止膜及び太陽電池モジュールの製造方法の実施の形態に係る封止工程を示す断面斜視図である。
【図２】本発明の太陽電池用封止膜及び太陽電池モジュールの製造方法の他の実施の形態に係る封止工程を示す断面斜視図である。
【図３】太陽電池モジュールの構成を示す断面図である。
【図４】従来の太陽電池モジュールの製造方法を示す断面図である。
【符号の説明】
１　開口付きＥＶＡフィルム
１Ａ　開口
２，３　封止用ＥＶＡフィルム
４　凹部付きＥＶＡフィルム
４Ａ　凹部
１１　ガラス基板
１２　バックカバー
１３Ａ，１３Ｂ　ＥＶＡフィルム
１４　太陽電池用セル
１５Ａ、１５Ｂ　エンボス付きＥＶＡフィルム[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a solar cell sealing film and a method for manufacturing a solar cell module, and more particularly to a solar cell sealing capable of effectively preventing damage to solar cell in a sealing step at the time of manufacturing a solar cell module. The present invention relates to a film and a method for manufacturing a solar cell module using the solar cell sealing film.
[0002]
[Prior art]
2. Description of the Related Art In recent years, solar cells that directly convert sunlight into electric energy have attracted attention in terms of effective use of resources, prevention of environmental pollution, and the like, and development has been promoted.
[0003]
As shown in FIG. 3, the solar cell module generally has an ethylene-vinyl acetate copolymer resin (EVA) film 13A between a glass substrate 11 as a front-side transparent protection member and a back-side protection member (back cover) 12. , 13B are sealed with a solar cell 14 such as a silicon power generation element.
[0004]
In such a solar cell module, a glass substrate 11, an EVA film 13A for a sealing film, a solar cell 14, a EVA film 13B for a sealing film, and a back cover 12 are laminated in this order, and heated and pressed to form an EVA. Is manufactured by cross-linking and hardening to be integrated.
[0005]
By the way, when the solar cell module is manufactured, the EVA film is pressed against the solar cell at the time of heating and pressurizing in the sealing step, and there is a problem that the solar cell module is broken by the pressing force.
[0006]
Hitherto, in order to prevent the solar cell from being damaged at the time of sealing, there has been proposed an EVA film in which a concave portion is formed on the film surface by embossing the film. In the case of an EVA film subjected to embossing, as shown in FIG. 4, a glass substrate 11, an EVA film 15A with an emboss, a solar cell 14, a EVA film 15B with an emboss, and a back cover 12 are laminated in this order and heated. Prevents breakage of solar cell 14 by cushioning when embossed surfaces of EVA films 15A and 15B collapse when manufacturing solar cell module by pressurizing, cross-linking and curing EVA and bonding and integrating. can do.
[0007]
[Problems to be solved by the invention]
If the film is embossed in this way, the damage of the solar cell is prevented, but it cannot be said that a sufficiently satisfactory effect has been obtained, and further improvement is desired. .
[0008]
In particular, in recent years, in order to reduce costs by reducing the amount of silicon constituting the solar cell module, thinning of the solar cell is required, and in this case, the solar cell is more likely to be damaged, There is a need for a solar cell sealing film that can further reduce the stress applied to the solar cell during sealing.
[0009]
Therefore, the present invention reliably prevents damage to the solar cell in the sealing step when manufacturing a solar cell module, a solar cell sealing film that can efficiently produce a solar cell module with good yield, An object of the present invention is to provide a method for manufacturing a solar cell module using the solar cell sealing film.
[0010]
[Means for Solving the Problems]
The solar cell sealing film of the present invention (first invention) is a solar cell used for manufacturing a solar cell module by sealing a solar cell between a front-side transparent protective member and a back-side protective member. An opening for accommodating the solar cell is formed in the battery sealing film.
[0011]
In the method for manufacturing a solar cell module according to the present invention (claim 9), an interposing step of interposing a sealing film and a solar cell between the front-side transparent protective member and the back-side protective member, and then heating and pressing. A sealing step of sealing the solar cell between the front-side transparent protective member and the back-side protective member, and
In the interposing step, the solar cell sealing film of the present invention is used as the sealing film, and the solar cell is accommodated in an opening of the solar cell sealing film.
[0012]
The solar cell sealing film of the present invention (claim 4) is used for manufacturing a solar cell module by sealing a solar cell between a front-side transparent protective member and a back-side protective member. A concave portion for accommodating the solar cell is formed in the battery sealing film.
[0013]
The method for manufacturing a solar cell module according to the present invention (claim 11) includes an interposing step of interposing a sealing film and a solar cell between the front-side transparent protective member and the back-side protective member;
A sealing step of heating and pressing to seal the solar cell between the front-side transparent protective member and the back-side protective member, and a method of manufacturing a solar cell module, As a sealing film, such a solar cell sealing film of the present invention is used, and the solar cell is accommodated in a concave portion of the solar cell sealing film.
[0014]
In the method for manufacturing a solar cell sealing film and a solar cell module of the present invention, sealing can be performed in a state where the solar cell is housed in the opening or the concave portion, and the pressing force at the time of sealing is directly applied to the solar cell. Since it is prevented from directly applying to the cell, breakage of the solar cell in the sealing step is prevented.
[0015]
Such a sealing film for a solar cell of the present invention is preferably made of a film obtained by forming an ethylene-vinyl acetate copolymer resin (EVA).
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a method for manufacturing a solar cell sealing film and a solar cell module of the present invention will be described in detail with reference to the drawings.
[0017]
1 and 2 are cross-sectional perspective views showing a sealing step according to an embodiment of a method for manufacturing a solar cell sealing film and a solar cell module of the present invention. 1 and 2, members having the same functions as those in FIGS. 3 and 4 are denoted by the same reference numerals.
[0018]
In the method shown in FIG. 1, an EVA film 1 with an opening in which an opening 1A for accommodating a solar cell 14 is formed, an EVA film 2 for sealing disposed on a back cover 12 side, and disposed on a glass substrate 11 side. Using the sealing EVA film 3, first, the sealing EVA film 3 and the EVA film 1 with the opening are laminated on the glass substrate 11, and the solar cell 14 is arranged in the opening 1 A of the EVA film 1 with the opening. Then, the sealing EVA film 2 and the back cover 12 are further laminated, and the laminated body is heated and pressed according to a conventional method to produce a solar cell module.
[0019]
In the method shown in FIG. 2, the EVA film 4 with the concave portion in which the concave portion 4A for accommodating the solar cell 14 is formed, and the sealing EVA film 2 disposed on the back cover 12 side are used. The EVA film 4 with the concave portion is laminated thereon, the solar cell 14 is arranged in the concave portion 4A of the EVA film 4 with the concave portion, and the EVA film 2 for sealing and the back cover 12 are further laminated. To produce a solar cell module.
[0020]
In any of the cases of FIGS. 1 and 2, at the time of sealing, the solar cell 14 is housed in the opening 1A of the EVA film 1 with an opening or the recess 4A of the EVA film 4 with a recess. It is not directly added to the solar cell 14, and even a thin solar cell 14 can reliably prevent damage during sealing.
[0021]
The opening 1A of the EVA film 1 with an opening is provided in accordance with the arrangement of the solar cell 14 of the solar cell module, and the thickness of the EVA film 1 with an opening corresponding to the depth of the opening 1A is determined by changing the thickness of the solar cell 14 Any thickness may be used as long as it can be sufficiently accommodated in the opening 1A. In FIG. 1, the thickness of the EVA film 1 with the opening is larger than the thickness of the solar cell 14, and the solar cell 14 is completely inserted into the opening 1A, but the solar cell 14 is in the opening 1A. It is not always necessary for the whole to enter, and it may be slightly protruded. Even in this case, since most of the solar cell 14 is inserted into the opening 1A, the pressing force applied to the solar cell 14 at the time of sealing is greatly reduced.
[0022]
In order to reliably obtain the effect of preventing damage by accommodating the solar cell 14 in the opening 1A, the thickness of the EVA film 1 with the opening is 0.2 to 5 times the thickness of the solar cell 14. It is preferably 0.5 times, especially 0.5 times to 2 times.
[0023]
The shape of the opening 1A of the EVA film 1 with an opening in a plan view is substantially similar to the shape of the solar cell 14 in a plan view and is equal to the size of the solar cell 14 but slightly larger. However, if the opening 1A is too large with respect to the solar cell 14, the arrangement of the solar cell 14 may be disturbed due to the movement of the solar cell 14 during sealing. If the size is too small, the efficiency of mounting the solar cell 14 to the opening 1A is deteriorated. Therefore, the area of the opening 1A is preferably about 0.8 to 1.2 times the area of the solar cell.
[0024]
Similarly, the concave portion 4A of the EVA film 4 with the concave portion is also provided in accordance with the arrangement of the solar cell 14 of the solar cell module, and the depth of the concave portion 4A can sufficiently accommodate the solar cell 14 in the concave portion 1A. Any depth is acceptable. In FIG. 2, the depth of the concave portion 4A is larger than the thickness of the solar cell 14 and the solar cell 14 is completely inserted into the concave portion 4A, but the solar cell 14 is not necessarily inserted into the concave portion 4A. It is not necessary for the whole to enter, and it may protrude slightly. Even in this case, since most of the solar cell 14 is inserted into the recess 4A, the pressing force applied to the solar cell 14 at the time of sealing is greatly reduced.
[0025]
In order to surely obtain the effect of preventing damage by accommodating the solar cell 14 in the concave portion 4A, the depth of the concave portion 4A of the EVA film 4 with concave portion is 0.1 mm relative to the thickness of the solar cell 14. It is preferably 2 to 5 times, particularly preferably 0.5 to 2 times.
[0026]
The plan view shape of the recess 4A of the EVA film 4 with the recess is substantially similar to the plan view shape of the solar cell 14 and is equal to, but slightly larger than, the size of the solar cell 14. However, if the concave portion 4A is too large with respect to the solar cell 14, the arrangement of the solar cell 14 may be disturbed due to the movement of the solar cell 14 at the time of sealing, and conversely, If the size is too small, the mounting efficiency of the solar cell 14 in the recess 4A is deteriorated. Therefore, the area of the recess 4A is preferably about 0.8 to 1.2 times the area of the solar cell.
[0027]
When the EVA film 1 with an opening shown in FIG. 1 is used, the EVA films 2 and 3 for sealing are required between the EVA film 1 with an opening, the back cover 12 and the glass substrate 11, respectively. The thickness of the sealing EVA films 2 and 3 is usually 100 to 2000 μm, and preferably 200 to 1000 μm.
[0028]
On the other hand, when the EVA film 4 with concave portions shown in FIG. 2 is used, the EVA film 4 with concave portions can also serve as the EVA film for sealing on the glass substrate side, and therefore, the EVA film for sealing on the back cover 12 side. Only the film 2 is sufficient. The thickness of the sealing EVA film 2 is usually 100 to 2000 μm, and preferably 200 to 1000 μm. The value obtained by subtracting the depth of the recess 4A from the total thickness of the recess 4A of the EVA film 4 with the recess is preferably 100 to 2000 μm, particularly preferably 200 to 1000 μm.
[0029]
Next, an EVA resin composition suitable as a raw material for forming an EVA film used in the present invention will be described.
[0030]
The EVA resin used in the present invention preferably has a vinyl acetate content of 40% by weight or less, preferably 10 to 36% by weight, particularly preferably 10 to 33% by weight, particularly preferably 10 to 26% by weight. .
[0031]
If the content of vinyl acetate in the EVA resin exceeds 40% by weight, the resin becomes very easy to flow and easily flows out between the glass substrate and the back cover during sealing. In addition, the tackiness is increased, the tack becomes easy, and the handleability is deteriorated.
[0032]
An EVA resin having a vinyl acetate content of less than 10% by weight has poor processability, and the film is too hard, has poor degassing properties, and tends to cause damage to solar cell.
[0033]
The EVA resin used in the present invention preferably has a melt flow rate of 0.7 to 20, more preferably 1.5 to 10.
[0034]
The EVA resin composition used in the present invention has a cross-linking structure by blending a cross-linking agent for improving weather resistance. The cross-linking agent is generally an organic peroxide which generates radicals at 100 ° C. or higher. In particular, in consideration of the stability at the time of blending, those having a half-life of 10 hours and a decomposition temperature of 70 ° C. or more are preferable. Examples of such an organic peroxide include 2,5-dimethylhexane; 2,5-dihydroperoxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexane; -T-butyl peroxide; t-dicumyl peroxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne; dicumyl peroxide; α, α'-bis (t-butylperoxide) Oxyisopropyl) benzene; n-butyl-4,4-bis (t-butylperoxy) butane; 2,2-bis (t-butylperoxy) butane; 1,1-bis (t-butylperoxy) cyclohexane 1,1-bis (t-butylperoxy) 3,3,5-trimethylcyclohexane; t-butylperoxybenzoate; benzoyl peroxide or the like; Kill. The amount of these organic peroxides is generally 5 parts by weight or less, preferably 1 to 3 parts by weight, based on 100 parts by weight of the EVA resin.
[0035]
In addition, a silane coupling agent can be added to the EVA resin as a sealing film for a solar cell, for the purpose of improving the adhesion to the solar cell. Known silane coupling agents for this purpose include, for example, γ-chloropropyltrimethoxysilane; vinyltrichlorosilane; vinyltriethoxysilane; vinyl-tris- (β-methoxyethoxy) silane; γ-methacryloxy. Propyltrimethoxysilane; β- (3,4-ethoxycyclohexyl) ethyltrimethoxysilane; γ-glycidoxypropyltrimethoxysilane; vinyltriacetoxysilane; γ-mercaptopropyltrimethoxysilane; γ-aminopropyltrimethoxysilane N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane and the like. The amount of the silane coupling agent is generally 5 parts by weight or less, preferably 0.1 to 2 parts by weight, based on 100 parts by weight of the EVA resin.
[0036]
Further, a crosslinking aid can be added to the EVA resin in order to improve the gel fraction of the EVA resin and improve the durability. Examples of the crosslinking aid used for this purpose include known trifunctional isocyanurates; trifunctional crosslinking aids such as triallyl isocyanate, and monofunctional crosslinking aids such as NK esters. it can. The amount of these crosslinking aids is generally 10 parts by weight or less, preferably 1 to 5 parts by weight, based on 100 parts by weight of the EVA resin.
[0037]
Further, for the purpose of improving the stability of the EVA resin, hydroquinone; hydroquinone monomethyl ether; p-benzoquinone; methylhydroquinone and the like can be added. The amount of these components is generally 5 parts by weight based on 100 parts by weight of the EVA resin. It is as follows.
[0038]
Further, if necessary, a coloring agent, an ultraviolet absorber, an antioxidant, a discoloration inhibitor and the like can be added in addition to the above. Examples of colorants include inorganic pigments such as metal oxides and metal powders, and organic pigments such as azo, phthalocyanine, azo, acidic or basic dye lakes. Examples of ultraviolet absorbers include 2-hydroxy-4-octoxybenzophenone; benzophenones such as 2-hydroxy-4-methoxy-5-sulfobenzophenone; 2- (2′-hydroxy-5-methylphenyl) benzotriazole; Hindered amines such as benzotriazoles; phenylsalicylate; and pt-butylphenylsalicylate. Antioxidants include amines; phenols; bisphenyls; and hindered amines. For example, di-t-butyl-p-cresol; bis (2,2,6,6-tetramethyl-4-piperazyl) ) Sebacate etc.
[0039]
An EVA film 1 with an opening having an opening 1A as shown in FIG. 1 is formed by, for example, using such an EVA resin composition, by heating and rolling, and then disintegrating and punching with a blade die to form the opening 1A. Can be produced.
[0040]
Further, the EVA film 4 with concave portions having the concave portions 4A as shown in FIG. 2 is formed into a film by heating and rolling using such an EVA resin composition, and is formed into an embossing roll in which a predetermined pattern is engraved. It can be manufactured by forming the concave portion 4A by passing the filmed EVA film.
[0041]
The sealing conditions using such an EVA film, that is, the heating and pressurizing conditions of the laminate, are preferably a temperature of 90 to 170 ° C. using a vacuum laminator, a deaeration time + a heat and pressurization time of 5 to 12 minutes, and a press pressure. 0.1 to 1.1 kg / cm ² , at 100 to 150 ° C. for 8 to 45 minutes in an oven or the like. During this heating and pressurization, the EVA film is cross-linked to form a sealing film having excellent weather resistance. it can.
[0042]
Note that the method illustrated in FIGS. 1 and 2 is an example of an embodiment of the present invention, and the present invention is not limited to the illustrated method unless it exceeds the gist.
[0043]
For example, the EVA films 2 and 3 for sealing may be embossed. Further, the sealing EVA film 2 may be integrated with the back guard 12 in advance. Further, in FIGS. 1 and 2, the glass plate 11 is used as the front side transparent protection member and the back cover is used as the back side protection member. However, the front side transparent protection member and the back side protection member are not limited to these. Not something.
[0044]
【Example】
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
[0045]
Example 1
A solar cell module was manufactured by the method shown in FIG.
[0046]
First, an EVA film with an opening and an EVA film for sealing having the following composition were produced using the EVA resin composition having the following composition.
[0047]

[0048]
[EVA film with opening]
EVA film with openings of 600 μm thickness, in which square openings of 100 mm × 100 mm are formed at equal intervals vertically and horizontally.
[EVA film for sealing]
A flat film-like film having a thickness of 600 μm As shown in FIG. 1, the sealing EVA film 3 and the EVA film 1 with an opening are laminated on a glass substrate 11 having a thickness of 3 mm. A solar cell (silicon power generation element) 14 having a square shape of 100 mm × 100 mm and a thickness of 400 μm is arranged, and an EVA film 2 for sealing and a back cover 12 made of a 38-mm-thick fluorinated polyethylene film are further laminated. Using a vacuum laminator, the laminate was heated and pressed by hot plate temperature of 150 ° C., deaeration time of 5 minutes, press pressure of 1 atm, and press time of 45 minutes, and sealed by cross-linking the EVA resin.
[0050]
In this way, when 100 solar cells were produced, no damage to the solar cell was observed.
[0051]
Example 2
A solar cell module was manufactured by the method shown in FIG.
[0052]
First, using the EVA resin composition having the same composition as that used in Example 1, an EVA film with a concave portion and an EVA film for sealing having the following structures were produced.
[0053]
[EVA film with recess]
An EVA film with a concave portion having a total thickness of 600 μm, in which square concave portions having a depth of 400 μm and 100 mm × 100 mm are formed at equal intervals vertically and horizontally.
[EVA film for sealing]
As shown in FIG. 2, a flat film-like film having a thickness of 600 μm is formed by laminating the above-mentioned EVA film 4 with concave portions on a glass substrate 11 having a thickness of 3 mm. A solar cell (silicon power generating element) 14 having a thickness of 400 μm is arranged, and an EVA film 2 for sealing and a back cover 12 made of a fluorinated polyethylene film having a thickness of 38 mm are further laminated. Sealing was performed by heating and pressing under the same conditions.
[0055]
In this manner, when 100 solar cell modules were manufactured, no damage to the solar cell was observed.
[0056]
Comparative Example 1
In Example 1, when a solar cell module was produced in the same manner except that the EVA film with an opening was not used, three out of 100 solar cell cells were found to be damaged.
[0057]
【The invention's effect】
As described above in detail, according to the method for manufacturing a solar cell sealing film and a solar cell module of the present invention, the cell is formed by pressing the sealing film against the solar cell in the sealing step when manufacturing the solar cell module. Can be reliably prevented, and a solar cell can be efficiently manufactured with a high yield.
[Brief description of the drawings]
FIG. 1 is a cross-sectional perspective view showing a sealing step according to an embodiment of a method for manufacturing a solar cell sealing film and a solar cell module of the present invention.
FIG. 2 is a cross-sectional perspective view showing a sealing step according to another embodiment of the method for manufacturing a solar cell sealing film and a solar cell module of the present invention.
FIG. 3 is a cross-sectional view illustrating a configuration of a solar cell module.
FIG. 4 is a cross-sectional view illustrating a method for manufacturing a conventional solar cell module.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 EVA film with opening 1A Opening 2, 3 EVA film for sealing 4 EVA film with recess 4A recess 11 Glass substrate 12 Back cover 13A, 13B EVA film 14 Solar cell 15A, 15B EVA film with emboss

Claims (12)

In a solar cell sealing film used when manufacturing a solar cell module by sealing the solar cell between the front side transparent protective member and the back side protective member,
An encapsulating film for a solar cell, wherein an opening for accommodating the solar cell is formed. The solar cell sealing film according to claim 1, wherein the thickness of the solar cell sealing film is 0.2 to 5 times the thickness of the solar cell. The solar cell according to claim 1, wherein the opening is substantially similar in shape to the solar cell, and the opening area is 0.8 to 1.2 times the area of the solar cell. Battery sealing film. In a solar cell sealing film used when manufacturing a solar cell module by sealing the solar cell between the front side transparent protective member and the back side protective member,
A sealing film for a solar cell, wherein a concave portion for accommodating the solar cell is formed. 5. The solar cell sealing film according to claim 4, wherein the depth of the concave portion is 0.2 to 5 times the thickness of the solar cell. The solar cell sealing film according to claim 4 or 5, wherein a value obtained by subtracting the depth of the recess from the total thickness of the solar cell sealing film is 100 to 2000 µm. The solar cell according to any one of claims 4 to 6, wherein the concave portion has a shape substantially similar to the solar cell, and the area of the concave portion is 0.8 to 1.2 times the area of the solar cell. A sealing film for a solar cell, comprising: The solar cell sealing film according to any one of claims 1 to 7, comprising a film obtained by forming a film of an ethylene-vinyl acetate copolymer resin. An interposing step of interposing a sealing film and a solar cell between the front side transparent protective member and the back side protective member,
Then, a sealing step of heating and pressing to seal the solar cell between the front side transparent protective member and the back side protective member,
In the method for manufacturing a solar cell module having
In the interposing step, the solar cell sealing film according to any one of claims 1 to 3 and claim 8 is used as the sealing film,
A method for manufacturing a solar cell module, wherein the solar cell is accommodated in an opening of the solar cell sealing film. 10. The front side sealing film, the solar cell sealing film accommodating the solar cell in an opening, and the back side sealing between the front side transparent protection member and the back side protection member according to claim 9. A method for manufacturing a solar cell module, comprising laminating and interposing a film. An interposing step of interposing a sealing film and a solar cell between the front side transparent protective member and the back side protective member,
Then, a sealing step of heating and pressing to seal the solar cell between the front side transparent protective member and the back side protective member,
In the method for manufacturing a solar cell module having
In the intervening step, the sealing film for a solar cell according to any one of claims 4 to 8 is used as the sealing film,
A method for manufacturing a solar cell module, wherein the solar cell is accommodated in a concave portion of the solar cell sealing film. 12. The solar cell sealing film according to claim 11, wherein the solar cell is housed in a recess between the front-side transparent protection member and the back-side protection member, and a recess-forming surface of the solar cell sealing film. A method for manufacturing a solar cell module, comprising interposing a sealing film laminated on the side.

Images