JP2015213132A - Solar battery module - Google Patents

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JP2015213132A
JP2015213132A JP2014095635A JP2014095635A JP2015213132A JP 2015213132 A JP2015213132 A JP 2015213132A JP 2014095635 A JP2014095635 A JP 2014095635A JP 2014095635 A JP2014095635 A JP 2014095635A JP 2015213132 A JP2015213132 A JP 2015213132A
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resin
weight
receiving surface
contained
bromine
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直倫 大橋
Naomichi Ohashi
直倫 大橋
康寛 鈴木
Yasuhiro Suzuki
康寛 鈴木
日野　裕久
Hirohisa Hino
裕久 日野
秀規 宮川
Hideki Miyagawa
秀規 宮川
幸弘 吉嶺
Yukihiro Yoshimine
幸弘 吉嶺
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Panasonic Intellectual Property Management Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E10/546—Polycrystalline silicon PV cells

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Abstract

PROBLEM TO BE SOLVED: To provide a solar battery module arranged so as to be able to suppress the drop in output owing to a reaction between impurity ions and silicon or an electrode member included in a solar battery cell on condition that moisture is absorbed in the solar battery module, which can be manufactured at low cost.SOLUTION: A solar battery module comprises: a solar battery cell; and a resin sealing up a light-receiving surface of the solar battery cell and the rear surface thereof. The resin includes a resin 13 on the side of the light-receiving surface and a resin 14 on the side of the rear surface. The content of chlorine that the resin 13 includes on the side of the light-receiving surface is 0.02 wt% or more and less than 0.15 wt% to the total weight of the resin. The content of bromine that the resin 13 includes on the side of the light-receiving surface is less than 0.15 wt% to the total weight of the resin. The content of chlorine that the resin 14 includes on the side of the rear surface is 0.2 wt% or more and less than 2.5 wt% to the total weight of the resin, and the content of bromine that the resin 14 includes on the side of the rear surface is 0.2 wt% or more and less than 2.3 wt% to the total weight of the resin.

Description

本発明は、高い耐湿性を有し、かつ低コストで作製可能な太陽電池モジュールに関するものである。   The present invention relates to a solar cell module that has high moisture resistance and can be manufactured at low cost.

太陽電池は、クリーンで無尽蔵に供給される太陽光を直接電気に変換することができるため、新規エネルギー源として期待されている。従来の太陽電池モジュールは、図３の断面図に示すように、ガラス２２と裏面保護シート２５との間に、受光面樹脂２３と裏面樹脂２４により封止された太陽電池セル２１を備えるものが一般的である。   Solar cells are expected as a new energy source because they can directly convert clean and infinitely supplied sunlight into electricity. As shown in the cross-sectional view of FIG. 3, the conventional solar battery module includes a solar battery cell 21 sealed with a light receiving surface resin 23 and a back surface resin 24 between a glass 22 and a back surface protection sheet 25. It is common.

このような太陽電池は、ガラス２２、受光面樹脂２３、太陽電池セル２１、裏面樹脂２４、裏面保護シート２５をこの順で積層し、加熱加圧することで接着一体化させて製造されている。   Such a solar cell is manufactured by laminating the glass 22, the light receiving surface resin 23, the solar cell 21, the back surface resin 24, and the back surface protective sheet 25 in this order, and bonding and integrating them by heating and pressing.

これらの受光面樹脂２３や裏面樹脂２４、裏面保護シート２５の役割は主には太陽電池セル２１を外部からの水分や光、衝撃から保護することであり、水分や紫外線に対し安定であることが求められる。   The roles of the light receiving surface resin 23, the back surface resin 24, and the back surface protection sheet 25 are mainly to protect the solar cells 21 from moisture, light, and impact from the outside, and to be stable against moisture and ultraviolet rays. Is required.

特開平６−１７７４１２号公報Japanese Patent Laid-Open No. 6-177412

しかしながら、上記の受光面樹脂や裏面樹脂、裏面保護シートの組合せによっては、耐候性が、数十年という長期的視点からすると十分とは言い切れなく、太陽電池セルの出力低下を招いてしまう。   However, depending on the combination of the light receiving surface resin, the back surface resin, and the back surface protective sheet, the weather resistance is not sufficient from a long-term viewpoint of several decades, and the output of the solar battery cell is reduced.

本発明は、前記従来の問題を解決するもので、特に耐湿性に優れ、かつ低コストで作製できる太陽電池モジュールを提供することを目的とする。   The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a solar cell module that is particularly excellent in moisture resistance and can be manufactured at low cost.

上記目的を達成するために、太陽電池セルの受光面、裏面をそれぞれ受光面側の樹脂と裏面樹脂で封止している太陽電池モジュールであって、受光面側の樹脂に含まれる塩素の量は、０．１５重量％未満、受光面側の樹脂に含まれる臭素の量は、０．１５重量％未満、裏面側の樹脂に含まれる塩素の量は、２．５重量％未満、裏面側の樹脂に含まれる臭素の量は、２．３重量％未満、であることを特徴とする太陽電池モジュールを用いる。   In order to achieve the above object, a solar cell module in which the light receiving surface and the back surface of a solar cell are sealed with a resin on the light receiving surface side and a resin on the back surface, respectively, and the amount of chlorine contained in the resin on the light receiving surface side Is less than 0.15% by weight, the amount of bromine contained in the resin on the light-receiving surface side is less than 0.15% by weight, the amount of chlorine contained in the resin on the back side is less than 2.5% by weight, the back side The solar cell module is characterized in that the amount of bromine contained in the resin is less than 2.3% by weight.

以上のように、本発明の太陽電池モジュールによれば、太陽電池セルの受光面樹脂に含まれている塩素又は臭素の量を０．１重量％未満に抑えることで耐湿性に優れる太陽電池モジュールを作製できる。   As described above, according to the solar cell module of the present invention, the solar cell module having excellent moisture resistance by suppressing the amount of chlorine or bromine contained in the light receiving surface resin of the solar cell to less than 0.1% by weight. Can be produced.

また、太陽電池セルの裏面樹脂に含まれる塩素又臭素の含有量の許容値は受光面樹脂よりは高く、樹脂に対し０．２重量％〜１重量％の範囲であっても耐湿性に優れる太陽電池モジュールが得られる。   Further, the allowable value of the content of chlorine or bromine contained in the back surface resin of the solar battery cell is higher than that of the light receiving surface resin, and it is excellent in moisture resistance even if it is in the range of 0.2% by weight to 1% by weight with respect to the resin. A solar cell module is obtained.

一般的に、塩素又は臭素の量を少なくするほど、コストがかかる。しかし、受光面樹脂及び裏面樹脂に含まれる塩素又は臭素の量を少なくとも上記の範囲にすれば、低コストでかつ耐湿性に優れる太陽電池モジュールを得ることができる。   Generally, the lower the amount of chlorine or bromine, the higher the cost. However, if the amount of chlorine or bromine contained in the light receiving surface resin and the back surface resin is at least within the above range, a solar cell module having low cost and excellent moisture resistance can be obtained.

実施の形態の太陽電池モジュールの断面図Cross-sectional view of solar cell module of embodiment （ａ）〜（ｄ）実施例、比較例の太陽電池モジュールの特性のグラフを示す図(A)-(d) The figure which shows the graph of the characteristic of the solar cell module of an Example and a comparative example. 従来例の太陽電池モジュールの断面図Sectional view of a conventional solar cell module

以下本発明の実施の形態について、図面を参照しながら説明する。   Embodiments of the present invention will be described below with reference to the drawings.

（実施の形態）
本発明の実施の形態における太陽電池モジュールの断面を、図１に示す。図１において、太陽電池セル１１は、受光面側（図で上側）では、受光面樹脂１３で覆われている。裏面側は、裏面樹脂１４により被覆されている。また、裏面樹脂１４は、裏面保護シート１５に被覆されている。 (Embodiment)
FIG. 1 shows a cross section of the solar cell module in the embodiment of the present invention. In FIG. 1, the solar battery cell 11 is covered with a light receiving surface resin 13 on the light receiving surface side (upper side in the drawing). The back side is covered with a back side resin 14. Further, the back surface resin 14 is covered with a back surface protection sheet 15.

受光面樹脂１３には、着色フィラー等無機フィラーは含まれておらず無色透明である。
また、受光面樹脂１３に含まれる塩素又は臭素の量が樹脂に対し０．１５重量％未満、好ましくは、塩素は０．０８重量％以下、臭素は０．０６重量％以下がよい。 The light-receiving surface resin 13 does not contain an inorganic filler such as a colored filler and is colorless and transparent.
Further, the amount of chlorine or bromine contained in the light-receiving surface resin 13 is less than 0.15% by weight, preferably 0.08% by weight or less for chlorine and 0.06% by weight or less for bromine.

裏面樹脂１４には白色フィラーが含まれており白色である。裏面樹脂１４に含まれる塩素は、２．５重量％未満０．２重量％以上、好ましくは、１．０重量％以下である。裏面樹脂１４に含まれる臭素は、２．３重量％未満０．２重量％以上、好ましくは、１．０重量％以下が好ましい。   The back surface resin 14 contains a white filler and is white. Chlorine contained in the back surface resin 14 is less than 2.5% by weight, 0.2% by weight or more, and preferably 1.0% by weight or less. The bromine contained in the back resin 14 is less than 2.3% by weight, 0.2% by weight or more, and preferably 1.0% by weight or less.

裏面保護シート１５には、ＰＥＴ（Ｐｏｌｙｅｔｈｙｌｅｎｅ Ｔｅｒｅｐｈｔｈａｌａｔｅ）等の樹脂フィルム、Ａｌ箔を樹脂フィルムでサンドイッチした構造を有する積層フィルム等を用いることができる。   For the back surface protection sheet 15, a resin film such as PET (Polyethylene Terephthalate), a laminated film having a structure in which an Al foil is sandwiched between resin films, and the like can be used.

＜効果＞
かかる構成によれば、受光面樹脂１３に含まれる塩素又は臭素の量が、０．１５重量％未満であることを特徴とすることにより、太陽電池モジュールを屋外暴露した環境において、太陽電池モジュールに水分が浸入した際、臭素や塩素が太陽電池セル１１を構成するシリコン又は電極部材と反応することによる出力低下を抑制することができる。 <Effect>
According to such a configuration, the amount of chlorine or bromine contained in the light-receiving surface resin 13 is less than 0.15% by weight. When water enters, bromine or chlorine can suppress a decrease in output due to reaction with silicon or electrode members constituting the solar battery cell 11.

また、裏面樹脂１４に含まれる塩素は、２．５重量％未満０．２重量％以上、好ましくは、１．０重量％以下である。裏面樹脂１４に含まれる臭素は、２．３重量％未満０．２重量％以上、好ましくは、１．０重量％以下である。   Moreover, the chlorine contained in the back surface resin 14 is less than 2.5% by weight, 0.2% by weight or more, and preferably 1.0% by weight or less. Bromine contained in the back surface resin 14 is less than 2.3% by weight, 0.2% by weight or more, and preferably 1.0% by weight or less.

塩素又は臭素の量を少なくするほどコストがかかる。しかし、裏面樹脂１４に含まれる塩素又は臭素の量を、少なくとも、上記の範囲にすれば、低コストで太陽電池モジュールを作製するためである。   The lower the amount of chlorine or bromine, the higher the cost. However, if the amount of chlorine or bromine contained in the back surface resin 14 is at least within the above range, a solar cell module is produced at low cost.

この場合、太陽電池モジュールを屋外暴露した環境において、太陽電池モジュールに水分が浸入した際でも太陽電池セル１１の出力低下が抑えられている。   In this case, in the environment where the solar cell module is exposed outdoors, a decrease in the output of the solar cell 11 is suppressed even when moisture enters the solar cell module.

受光面樹脂１３と、裏面樹脂１４とで、塩素又は臭素の含有量による吸湿時の出力低下に違いが見られる原因としては、受光面側のガラスに含まれるＮａ等の不純物イオンが臭素や塩素と太陽電池セルを構成するシリコン又は電極部材との反応を促進させていることなどが考えられる。   The reason why the light receiving surface resin 13 and the back surface resin 14 show a difference in the output decrease during moisture absorption due to the chlorine or bromine content is that impurity ions such as Na contained in the glass on the light receiving surface side are bromine or chlorine. It is conceivable that the reaction between silicon and the electrode member constituting the solar cell is promoted.

なお、受光面樹脂１３に含まれる塩素又は臭素の量が、０．１５重量％未満でも太陽電池モジュールの耐湿性は問題ない。   Even if the amount of chlorine or bromine contained in the light receiving surface resin 13 is less than 0.15% by weight, there is no problem with the moisture resistance of the solar cell module.

なお、本実施の形態において、受光面樹脂１３の太陽電池セル１１の対面側にガラス１２を用いたが、無くても良いし、透明の樹脂を用いても良い。また、裏面樹脂１４の太陽電池セル１１の対面側に裏面保護シート１５を用いたが、無くても良い。   In the present embodiment, the glass 12 is used on the opposite side of the solar cell 11 of the light receiving surface resin 13, but it may be omitted or a transparent resin may be used. Moreover, although the back surface protection sheet 15 was used for the facing side of the photovoltaic cell 11 of the back surface resin 14, it does not need to be present.

＜実施例の製法＞
以下、本発明に係る太陽電池モジュールの製造方法について、実施例を挙げて具体的に
説明する。但し、本発明は、下記の実施例に示したものに限定されるものではなく、その
要旨を変更しない範囲において、適宜変更して実施することができるものである。 <The manufacturing method of an Example>
Hereinafter, the manufacturing method of the solar cell module according to the present invention will be specifically described with reference to examples. However, the present invention is not limited to those shown in the following examples, and can be implemented with appropriate modifications within a range not changing the gist thereof.

以下のようにして、実施例に係る太陽電池モジュールを作製した。   The solar cell module according to the example was manufactured as follows.

まず、多結晶Ｓｉと電極、配線からなる一辺が１２ｃｍの正方形状の太陽電池セル１１を準備した。   First, a square solar cell 11 having a side of 12 cm made of polycrystalline Si, electrodes, and wiring was prepared.

次に、一辺が１４ｃｍのガラス１２にエポキシ系樹脂と酸無水物系硬化剤、硬化促進剤から構成される受光面樹脂１３として、液状の樹脂を塗布した。１２５℃で３０分間加熱し、受光面樹脂１３を硬化させた。   Next, a liquid resin was applied to the glass 12 having a side of 14 cm as the light receiving surface resin 13 composed of an epoxy resin, an acid anhydride curing agent, and a curing accelerator. Heating was performed at 125 ° C. for 30 minutes to cure the light receiving surface resin 13.

次に、硬化した受光面樹脂１３の部分に合わせて太陽電池セル１１を搭載した。   Next, solar cells 11 were mounted in accordance with the cured light receiving surface resin 13 portion.

次に、エポキシ系樹脂と酸無水物系の硬化剤と、硬化促進剤と、白色フィラーとしてのＴｉＯ２、ＳｉＯ２とを含む裏面樹脂１４の液状の樹脂を、太陽電池セル１１の裏面側及び、受光面樹脂１３の太陽電池セル１１以外の部分へスクリーン印刷により塗布した。なお、ＴｉＯ２は平均粒径１０μｍ、配合量は４重量％、である。ＳｉＯ２は平均粒径３０μｍである。 Next, the liquid resin of the back surface resin 14 containing an epoxy resin, an acid anhydride type curing agent, a curing accelerator, and TiO 2 and SiO 2 as white fillers is used as the back surface side of the solar battery cell 11 and And it apply | coated to the part other than the photovoltaic cell 11 of the light-receiving surface resin 13 by screen printing. TiO 2 has an average particle size of 10 μm and a blending amount of 4% by weight. SiO 2 has an average particle size of 30 μm.

次に、ＰＥＴ系樹脂からなる熱可塑性樹脂シートを裏面保護シート１５として、裏面樹脂１４に搭載し、この太陽電池モジュール全体を１２５℃で３０分間加熱し、裏面樹脂１４を硬化させた。   Next, a thermoplastic resin sheet made of a PET resin was mounted on the back surface resin 14 as the back surface protection sheet 15, and the entire solar cell module was heated at 125 ° C. for 30 minutes to cure the back surface resin 14.

以上により、本実施例では、太陽電池モジュールが作製された。   As described above, a solar cell module was produced in this example.

＜実施例、比較例＞
本発明の効果を実証するため、上記の製法で、実施例１〜５及び比較例１〜５の太陽電池モジュールを製造し、評価を行った。 <Examples and comparative examples>
In order to demonstrate the effect of the present invention, solar cell modules of Examples 1 to 5 and Comparative Examples 1 to 5 were manufactured and evaluated by the above-described manufacturing method.

各実施例、比較例における受光面樹脂１３及び裏面樹脂１４の塩素及び臭素の量、裏面樹脂１４の白色フィラーの量について表１にまとめる。白色フィラーの濃度は、樹脂全体に占める白色フィラーの質量比を表す。   Table 1 summarizes the amounts of chlorine and bromine in the light receiving surface resin 13 and the back surface resin 14 and the amount of white filler in the back surface resin 14 in each example and comparative example. The density | concentration of a white filler represents the mass ratio of the white filler which occupies for the whole resin.

実施例及び比較例の太陽電池モジュールの製造にあたって、受光面樹脂１３及び裏面樹脂１４の塩素の量は、エポキシ樹脂に含まれる塩素の濃度を変えて作製し、臭素の量は硬化促進剤に含まれる臭素の濃度を変えて作製した。なお、エポキシ樹脂は、塩素、臭素に対して、劣化が少なく、接着力もあるので好ましい。   In the production of the solar cell modules of Examples and Comparative Examples, the amounts of chlorine in the light-receiving surface resin 13 and the back surface resin 14 are prepared by changing the concentration of chlorine contained in the epoxy resin, and the amount of bromine is included in the curing accelerator. It was produced by changing the bromine concentration. Note that an epoxy resin is preferable because it is less deteriorated and has an adhesive force with respect to chlorine and bromine.

また、実施例及び比較例の太陽電池モジュールの製造は、ガラス１２や太陽電池セル１１、裏面保護シート１５は全て同じ部材を使用した。   Moreover, manufacture of the solar cell module of an Example and a comparative example used the same member for glass 12, the photovoltaic cell 11, and the back surface protection sheet 15 altogether.

Figure 2015213132
Figure 2015213132

（評価方法）
また、上記実施例及び比較例に係る太陽電池モジュールについて、耐湿試験前後で太陽電池モジュールの発電出力評価を行った。それぞれの評価方法は下記の通りである。 (Evaluation method)
Moreover, about the solar cell module which concerns on the said Example and comparative example, the electric power generation output evaluation of the solar cell module was performed before and after the moisture resistance test. Each evaluation method is as follows.

発電出力方法：（株）三永電機製作所社製、型番ＸＥＳ−１５１Ｓ−ＦＬのソーラーシュミレーターを用い、発電出力を評価。   Power generation output method: The power generation output was evaluated using a solar simulator of model number XES-151S-FL manufactured by Mitsunaga Electric Co., Ltd.

耐湿試験：温度８５℃，湿度８５％の恒温恒湿槽に太陽電池モジュールを１０００ｈ投入。   Humidity resistance test: A solar cell module is placed in a constant temperature and humidity chamber at 85 ° C. and 85% humidity for 1000 hours.

耐湿試験後で太陽電池モジュールの発電出力が初期比９５％以上を合格（○と表記）、９５％未満を不合格（×と表記）とした。   After the moisture resistance test, the power generation output of the solar cell module was determined to pass 95% or more of the initial ratio (represented as ◯) and less than 95% as rejected (represented as x).

これらの評価結果を表１に示す。また、図２（ａ）〜図２（ｄ）に、それぞれ濃度と出力比との関係をグラフ化した。   These evaluation results are shown in Table 1. Moreover, the relationship between density | concentration and output ratio was graphed to Fig.2 (a)-FIG.2 (d), respectively.

（１）受光面樹脂１３に含まれる塩素に関して
受光面樹脂１３に含まれる塩素は、比較例１と実施例１〜６の比較、図２（ａ）に示すように、０．１５重量％未満０．０２重量％以上、好ましくは、０．０８重量％以下０．０２重量％以上である。 (1) Regarding the chlorine contained in the light receiving surface resin 13, the chlorine contained in the light receiving surface resin 13 is less than 0.15% by weight as shown in the comparison between Comparative Example 1 and Examples 1 to 6, FIG. It is 0.02% by weight or more, preferably 0.08% by weight or less and 0.02% by weight or more.

（２）受光面樹脂１３に含まれる臭素に関して
受光面樹脂１３に含まれる臭素は、比較例２と実施例１〜６の比較、図２（ｂ）に示すように、０．１５重量％未満、好ましくは、０．０６重量％以下である。 (2) Regarding bromine contained in the light-receiving surface resin 13, the bromine contained in the light-receiving surface resin 13 is less than 0.15% by weight as shown in the comparison between Comparative Example 2 and Examples 1 to 6, FIG. The amount is preferably 0.06% by weight or less.

受光面樹脂１３と、裏面樹脂１４とで塩素又は臭素の含有量による吸湿時の出力低下に違いが見られる原因としては、受光面側のガラス１２に含まれるＮａ等の不純物イオンが臭素や塩素と太陽電池セル１１を構成するシリコン又は電極部材との反応を促進させているなどが考えられる。   The reason why the light receiving surface resin 13 and the back surface resin 14 have a difference in the output decrease upon moisture absorption due to the chlorine or bromine content is that impurity ions such as Na contained in the glass 12 on the light receiving surface side are bromine or chlorine. It is conceivable that the reaction between silicon and the electrode member constituting the solar battery cell 11 is promoted.

（３）裏面樹脂１４に含まれる塩素に関して
裏面樹脂１４に含まれる塩素は、比較例３と実施例１〜６の比較、図２（ｃ）より、
２．５重量％未満０．２重量％以上２、好ましくは、１．０重量％以下０．２重量％以上である。 (3) Regarding the chlorine contained in the back resin 14, the chlorine contained in the back resin 14 is a comparison between Comparative Example 3 and Examples 1 to 6, from FIG.
Less than 2.5% by weight is 0.2% by weight or more and 2, preferably 1.0% by weight or less and 0.2% by weight or more.

（４）裏面樹脂１４に含まれる臭素に関して
裏面樹脂１４に含まれる臭素は、比較例４と実施例１〜６の比較、図２（ｄ）より、
２．３重量％未満０．２重量％以上、好ましくは、１．０重量％以下０．２重量％以上である。 (4) Bromine contained in the back resin 14 with respect to bromine contained in the back resin 14 is a comparison between Comparative Example 4 and Examples 1 to 6, from FIG.
Less than 2.3% by weight and 0.2% by weight or more, preferably 1.0% by weight or less and 0.2% by weight or more.

裏面樹脂１４に含まれる塩素又は臭素の量は少ないほど良いが、塩素又は臭素の量を少なくするほどコストがかかる。このため、裏面樹脂に含まれる塩素又は臭素の量を上記の範囲にすれば、低コストで太陽電池モジュールを作製でき、また耐湿試験の基準も見たしており、望ましい。   The smaller the amount of chlorine or bromine contained in the back resin 14, the better, but the lower the amount of chlorine or bromine, the higher the cost. For this reason, if the amount of chlorine or bromine contained in the resin on the back surface is within the above range, a solar cell module can be produced at low cost, and the standard of the moisture resistance test is also seen, which is desirable.

（５）受光面樹脂１３の塩素、臭素、裏面樹脂１４の塩素、臭素の関係
表１から、裏面樹脂１４に含まれる臭素の重量％≧裏面樹脂１４に含まれる塩素の重量％＞受光面樹脂１３に含まれる臭素の重量％＞受光面樹脂１３に含まれる塩素の重量％であることが好ましい。 (5) Relationship between chlorine and bromine of the light-receiving surface resin 13 and chlorine and bromine of the back-side resin 14 From Table 1, the weight percentage of bromine contained in the back-side resin 14 ≧ the weight percentage of chlorine contained in the back-side resin 14> the light-receiving surface resin. It is preferable that the weight percentage of bromine contained in 13> weight percentage of chlorine contained in the light-receiving surface resin 13.

これは、受光面樹脂１３は、表面のガラスなどからのナトリウムなどの影響を受けるが、裏面樹脂１４は、その影響を直接受けないためである。   This is because the light-receiving surface resin 13 is affected by sodium or the like from the surface glass or the like, but the back surface resin 14 is not directly affected by the influence.

（６）受光面樹脂１３の塩素、臭素、裏面樹脂１４の塩素、臭素の関係
表１から、裏面樹脂１４に含まれる臭素の重量％と裏面樹脂１４に含まれる塩素の重量％との和は、受光面樹脂１３に含まれる臭素の重量％と受光面樹脂１３に含まれる塩素の重量％との和の５倍以上であるのが好ましい。 (6) Relationship between chlorine and bromine of the light receiving surface resin 13 and chlorine and bromine of the back surface resin 14 From Table 1, the sum of the weight percent of bromine contained in the back surface resin 14 and the weight percent of chlorine contained in the back surface resin 14 is It is preferably 5 times or more of the sum of the weight percent of bromine contained in the light receiving surface resin 13 and the weight percent of chlorine contained in the light receiving surface resin 13.

これは、（５）と同様、受光面樹脂１３は、表面のガラスなどからのナトリウムなどの影響を受けるが、裏面樹脂１４は、その影響を直接受けないためである。ナトリウムなどが受光面樹脂１３を拡散し、裏面樹脂１４へ到達するまでに、ロス、時間を要し、５倍以上の濃度差をつけておけば問題ない。   This is because, as in (5), the light-receiving surface resin 13 is affected by sodium or the like from the glass on the front surface, but the back surface resin 14 is not directly affected by the influence. It takes a loss and time for sodium or the like to diffuse through the light receiving surface resin 13 and reach the back surface resin 14, and there is no problem if a concentration difference of 5 times or more is given.

（７）裏面樹脂１４には無機物のフィラーに関して
裏面樹脂１４には無機物のフィラーは、比較例５と実施例１〜６の比較より、
３０重量％より多く、６０重量％以下である。好ましくは、４５重量％以上６０重量％以下である。 (7) With respect to the inorganic filler for the back resin 14, the inorganic filler for the back resin 14 is compared with Comparative Example 5 and Examples 1 to 6,
More than 30% by weight and not more than 60% by weight. Preferably, they are 45 weight% or more and 60 weight% or less.

これは、透湿性が低い無機フィラーが含有されるほど、裏面樹脂の透湿性が低くなるためであると考えられる。   This is considered to be because the moisture permeability of the back resin becomes lower as the inorganic filler having lower moisture permeability is contained.

本発明の太陽電池モジュールは、低コストで作製でき、かつ高い耐湿性を実現する太陽電池モジュール受光面全体が透明である太陽電池モジュールよりも高い発電効率を有し、発電素子によらず、太陽電池モジュール一般に使用することができる。   The solar cell module of the present invention can be manufactured at low cost and has higher power generation efficiency than a solar cell module in which the entire light-receiving surface of the solar cell module realizing high moisture resistance is transparent. Battery modules can be used in general.

１１ 太陽電池セル
１２ ガラス
１３ 受光面樹脂
１４ 裏面樹脂
１５ 裏面保護シート
２１ 太陽電池セル
２２ ガラス
２３ 受光面樹脂
２４ 裏面樹脂
２５ 裏面保護シート










DESCRIPTION OF SYMBOLS 11 Solar cell 12 Glass 13 Light reception surface resin 14 Back surface resin 15 Back surface protection sheet 21 Solar cell 22 Glass 23 Light reception surface resin 24 Back surface resin 25 Back surface protection sheet










Claims (6)

太陽電池セルの受光面、裏面をそれぞれ受光面側の樹脂と裏面樹脂で封止している太陽電池モジュールであって、
前記受光面側の樹脂に含まれる塩素の量は、０．１５重量％未満、
前記受光面側の樹脂に含まれる臭素の量は、０．１５重量％未満、
前記裏面樹脂に含まれる塩素の量は、２．５重量％未満、
前記裏面樹脂に含まれる臭素の量は、２．３重量％未満、
であることを特徴とする太陽電池モジュール。 A solar cell module in which the light receiving surface and the back surface of the solar battery cell are sealed with a resin on the light receiving surface side and a resin on the back surface, respectively.
The amount of chlorine contained in the resin on the light receiving surface side is less than 0.15% by weight,
The amount of bromine contained in the resin on the light receiving surface side is less than 0.15% by weight,
The amount of chlorine contained in the back resin is less than 2.5% by weight,
The amount of bromine contained in the back resin is less than 2.3% by weight,
The solar cell module characterized by being. 前記受光面側の樹脂に含まれる塩素の量は、０．０２重量％以上、
前記裏面樹脂に含まれる塩素の量は、０．２重量％以上、
前記裏面樹脂に含まれる臭素の量は、０．２重量％以上、
であることを特徴とする請求項１記載の太陽電池モジュール。 The amount of chlorine contained in the resin on the light receiving surface side is 0.02% by weight or more,
The amount of chlorine contained in the back resin is 0.2 wt% or more,
The amount of bromine contained in the back resin is 0.2 wt% or more,
The solar cell module according to claim 1, wherein: 前記裏面樹脂に含まれる臭素の重量％≧前記裏面樹脂に含まれる塩素の重量％＞前記受光面側の樹脂に含まれる臭素の重量％＞前記受光面側の樹脂に含まれる塩素の重量％である請求項１または２記載の太陽電池モジュール。 % By weight of bromine contained in the resin on the back surface ≧% by weight of chlorine contained in the resin on the back surface>% by weight of bromine contained in the resin on the light receiving surface side> wt% of chlorine contained in the resin on the light receiving surface side The solar cell module according to claim 1 or 2. 前記裏面樹脂に含まれる臭素の重量％と前記裏面樹脂に含まれる塩素の重量％との和は、
前記受光面側の樹脂に含まれる臭素の重量％と前記受光面側の樹脂に含まれる塩素の重量％との和の５倍以上である請求項１〜３のいずれか１項に記載の太陽電池モジュール。 The sum of the weight percentage of bromine contained in the back resin and the weight percentage of chlorine contained in the back resin is:
The sun according to any one of claims 1 to 3, wherein the sun is 5 times or more the sum of the weight percent of bromine contained in the resin on the light receiving surface side and the weight percent of chlorine contained in the resin on the light receiving surface side. Battery module. 前記裏面樹脂には無機物のフィラーが３０重量％より多く６０重量％以下含まれていることを特徴とする請求項１〜４のいずれか１項に記載の太陽電池モジュール。 5. The solar cell module according to claim 1, wherein the back surface resin contains an inorganic filler in an amount of more than 30 wt% and 60 wt% or less. 前記受光面側の樹脂、前記裏面樹脂はともに、エポキシ樹脂であることを特徴とする請求項１〜５のいずれか１項に記載の太陽電池モジュール。 6. The solar cell module according to claim 1, wherein both the resin on the light receiving surface side and the resin on the back surface are epoxy resins.
JP2014095635A 2014-05-07 2014-05-07 Solar battery module Pending JP2015213132A (en)

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