JP2004207462A

JP2004207462A - Solar cell module

Info

Publication number: JP2004207462A
Application number: JP2002374307A
Authority: JP
Inventors: Yoshinori Nishihara; 西原　　啓徳; Shinji Hayashi; 伸二林
Original assignee: Fuji Electric Holdings Ltd
Current assignee: Fuji Electric Co Ltd
Priority date: 2002-12-25
Filing date: 2002-12-25
Publication date: 2004-07-22

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar cell module having a structure for leading out lead wires from the rear surface side of an effective power generating region in which a solar cell is formed and exhibiting excellent fire resistance and assembling performance. <P>SOLUTION: The solar cell module comprises a solar cell 9 consisting of a plurality of solar cell elements connected in series or parallel and sealed with adhesive resin 7 between fire resistant surface protective member 6 and rear surface protective member 2 wherein the lead wires from the positive and negative electrodes of the solar cell penetrate the rear surface protective member before being connected electrically with an external connection cable through a terminal box 15. For example, a restricted part 11 projecting to the non-light receiving surface side is provided at least partially on the rear side of the rear surface protective member where the solar cell is formed, a slit 16 for passing the lead wires is provided at least partially at the rising part of the rear surface protective member 2 of the restricted part, and the lead wires led out from the slit are connected electrically with an external connection cable 4. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、防耐火性能を向上させた太陽電池モジュール、特に、太陽電池で発生した電力を外部に取り出す電力リード引き出し装置部分の構造に関する。
【０００２】
【従来の技術】
地球環境問題がクローズアップされる中で、太陽電池はクリーンな再生可能エネルギーとして大きな期待が寄せられている。
【０００３】
太陽電池は、結晶系の太陽電池とアモルファス系の薄膜太陽電池に大別される。結晶シリコンを主原料とする結晶系太陽電池モジュールは、既に商用規模での生産が始まっているが、その構造は、発電素子を充填材で被覆し受光面側をガラスでカバーしたものにアルミニウムなどのフレームを取り付け、これを屋根などの上に設置した架台に固定して用いるのが一般的である。このタイプの太陽電池モジュールは、ガラスを用いることによる重量と、太陽電池の原料である結晶シリコンの安定供給の問題等がある。
【０００４】
一方、主にアモルファスシリコンを用いる薄膜太陽電池モジュールの場合、耐熱性を有するプラスチックフィルムなどを発電素子の基板として用いた場合に、発電素子部分に柔軟性があるために、緩やかな曲面に適用することが可能であり、利用範囲が拡大される。例えば、この特徴を生かした鋼板一体型太陽電池モジュールを作る場合には、受光面側の表面保護材として、ガラス板の代わりに耐候性樹脂フィルムを適用し、発電素子の配置されていない周囲部分を曲げ加工すれば、通常の鋼板屋根材と同等な施工性で、軽量な太陽電池屋根を供給することが可能になり、これまで適用が困難とされてきたこれらの市場にも適用されるようになると考えられる。また、原料であるシリコンの使用量が少ないため、その供給の問題もない。
【０００５】
ところで、太陽電池モジュールを住宅の屋根に搭載する場合、防火に対する法規制に合致することが建築物として認可される上で必要な要件の１つである。例えば、木造建築物の場合、飛び火による延焼を防ぐため、屋根は不燃材で葺くこととされている。このため、従来構造の太陽電池を搭載するとき、屋根材としての太陽電池の耐火性を高めるために裏面保護部材に金属板、例えば前述のような鋼板を用いたものが用いられ、表面保護部材としては、耐火上好ましくは、不燃性のガラス板を用いる。また、耐火性はガラス板よりは劣るものの、施工性の向上や軽量化の観点から、例えば、ＥＴＦＥ（エチレン−テトラフルオロエチレン共重合体）などの難燃性樹脂フィルムが、表面保護部材として用いられる。
【０００６】
上記のように、裏面保護部材として鋼板を用いた建材一体形太陽電池モジュールの従来例について、以下に述べる（特許文献１および２参照）。
【０００７】
図８は、特許文献１に記載された太陽電池モジュールの図を引用して示す。図８において、１０１は光起電力素子、１０２は端子箱、１０３は電力取りだし用ケーブル、１０４は導電部材、１０５は裏面被覆材（鋼板）、１０６は端子取り出し用穴、１０７は表面被覆材（例えば、ＥＴＦＥ）、１０８は充填材（例えば、ＥＶＡ）である。本例では、裏面被覆材１０５の光起電力素子のない部分に端子取り出し用穴１０６を設け、光起電力素子１０１と電気的に接続された導電部材１０４を通じて端子取り出しを行う構造となっている。
【０００８】
一般に、太陽電池モジュールの耐火性能を試験する場合、受光面側からの飛び火を想定して、木材をモジュール受光面部で燃やす試験を行なう。表面被覆材のＥＴＦＥは難燃材ではあるが、飛び火により、時間の経過とともに孔があき、充填材のＥＶＡが延焼するが、裏面被覆材が鋼材の場合、屋根の野地板に延焼することは、かなり抑制される。しかしながら、端子取り出し穴を介して延焼する場合があり、上記特許文献１の場合には、裏面被覆材の受光面側に設けられた導電部材１０４そのもので端子取り出し穴の全面を覆うことで、屋根への延焼をできる限り抑制している。
【０００９】
しかしながら、上記構成によっても、飛び火後のモジュールの加熱変形等により、端子取り出し穴を介して延焼する危険性があり、この問題を解消するために、特許文献２に開示され図９に示す太陽電池モジュールにおいては、裏面材である亜鉛メッキ鋼板３０１に設けられた端子取り出し用の穴に不燃材又は準不燃材又は難燃性材料からなる閉塞手段３０８を設け、この閉塞手段を太陽電池素子に接続されたリード線を挿通させて、端子箱にリード線を引き出すことにより、防耐火性能を向上させている。なお、図９における他の部材（３０２〜３０７および３０９）やモジュール構成については、図８と同様であるので、説明を省略する。
【００１０】
上記特許文献２と同様に、太陽電池素子に接続されたリード線を、準不燃材又は難燃性材料からなる部材を介して、端子箱にリード線を引き出す構成に関しては、特許文献３にも開示されている。特許文献３に記載されたものは、同文献の請求項の記載を引用すれば、「平面状に配置された複数の光電変換素子と、光電変換素子の受光面側に配置された透光板と、光電変換素子の背面側に配置されたバックカバー部材と、透光板とバックカバー部材との間に充填された充填材と、光電出力を外部に取り出すためのリード線とを備える太陽電池モジュールにおいて、バックカバー部材には、リード線が通過するための開口部が形成され、該開口部を覆うためのマット部材がバックカバー部材の内側に配置されることを特徴とする太陽電池モジュール。」であり、また、「前記バックカバー部材およびマット部材は、同一の金属箔を含む材料で構成され、バックカバー部材に設けたリード線の開口部と、マット部材に設けたスリット状のリード線貫通用の開口部の位置をずらした構成とすることを特徴とするもの」である。
【００１１】
さらに、上記特許文献３と同様に、リード線貫通用の開口部を２段に設け、その位置をずらした構成の太陽電池モジュールは、本願と同一出願人によって、特許文献４に開示されている。
【００１２】
図１０は、特許文献４に開示されたモジュールの構成を示す。このモジュールは、「ガラス製の表面保護部材１１１と鋼板製の裏面保護部材１２１と側部金属製枠体１１０との間に、太陽電池１１２を接着性樹脂１１３により封止してなり、太陽電池の正極および負極の内部リード線を接続端子を介して外部リード線に電気的に接続してなる太陽電池モジュールにおいて、表面保護部材１１１と裏面保護部材１２１との間に中間保護部材１１４を設け、太陽電池１１２は表面保護部材と中間保護部材と金属製枠体との間に接着性樹脂を介して封止してなり、中間保護部材１１４を貫通して引き出した内部リード線１１７を、中間保護部材と裏面保護部材との間に設けた端子箱１１９内の接続端子を介して外部リード線１１８と電気的に接続し、この外部リード線を前記端子箱から裏面保護部材１２１を貫通して外部に引き出した構成」としている。
【００１３】
【特許文献１】
特開２０００−２４４００１号公報（第４頁、図１）
【特許文献２】
特開２０００−２４４０００号公報（第３−８頁、図１）
【特許文献３】
特開２００１−１０２６１６号公報（第４−５頁、図１、３）
【特許文献４】
特開２００２−１１１０３２号公報（第４頁、図１）
【００１４】
【発明が解決しようとする課題】
ところで、前記特許文献２ないし４に開示された太陽電池モジュールは、特許文献１に記載されたものに比較して、防耐火性能、特にモジュールの受光面側から、裏面保護部材のリード線貫通部を介して、屋根へ延焼することを防止する防耐火性能が向上するものの、下記のような問題点がある。
【００１５】
まず、特許文献２の場合には、火災時に閉塞手段（図９の３０８）が脱落しないように閉塞手段を取り付ける必要があり、このため閉塞手段は、襟状の脱落防止部を設けており、また、リード線を、太陽電池が形成された有効発電領域の裏面側から引き出しているので、リード線の引き出しに関わるモジュールの組み立てが簡単ではない。また、特許文献３や４のように、リード線貫通用の開口部を２段に位置をずらして設ける構成の場合も、程度や作業の質の差こそあれ、リード線の引き出しに関わるモジュールの組み立ては、同様に簡単ではない。
【００１６】
従って、前記特許文献２ないし４に開示された太陽電池モジュールは、量産性に優れた構成とはいえない。量産性の観点からは、むしろ、前記特許文献１のように、リード線を、太陽電池が形成された有効発電領域の範囲外から引き出す構成の方が望ましいが、この場合、スペースファクターや外観上、好ましくない。
【００１７】
この発明は、上記のような点に鑑みてなされたもので、本発明の課題は、耐火性に優れ、リード線を太陽電池が形成された有効発電領域の裏面側から引き出す構成を備え、かつ組み立て性に優れた太陽電池モジュールを提供することにある。
【００１８】
【課題を解決するための手段】
前述の課題を解決するため、この発明においては、耐火性の表面保護部材と耐火性の裏面保護部材との間に、複数個の太陽電池素子を直列または並列接続した太陽電池を接着性樹脂により封止してなり、前記太陽電池の正極および負極のリード線を、前記裏面保護部材を貫通し、端子箱を介して外部の接続ケーブルに電気的に接続してなる太陽電池モジュールであって、
前記裏面保護部材における前記太陽電池が形成された裏側の少なくとも一部に非受光面側に突出させた絞り加工部を設け、この絞り加工部の裏面保護部材の立ち上がり部の少なくとも一部に、前記リード線貫通用のスリット穴を設け、このスリット穴から引き出したリード線を、外部の接続ケーブルに電気的に接続してなるものとする（請求項１の発明）。
【００１９】
上記構成により、リード線はスリット穴から容易に引き出すことができるので、組み立てが容易となる。また、飛び火が発生して、万一接着性樹脂が燃焼したとしても、微小空隙を有する前記スリット穴で、延焼がくい止められる。さらに、好ましくは、このスリット穴および端子箱内に、後述する請求項７の発明のように、耐熱性樹脂を充填した場合には、延焼の抑制効果は極めて大となる。なお、この耐熱性樹脂としては、常温で液状であって室温硬化するものが適用できるので、この場合、組み立て性は損なわれない。
【００２０】
また前記課題は、下記請求項２または３の発明によっても、達成することができる。即ち、耐火性の表面保護部材と耐火性の裏面保護部材との間に、複数個の太陽電池素子を直列または並列接続した太陽電池を接着性樹脂により封止してなり、前記太陽電池の正極および負極のリード線を、前記裏面保護部材を貫通し、端子箱を介して外部の接続ケーブルに電気的に接続してなる太陽電池モジュールであって、前記裏面保護部材における前記太陽電池が形成された裏側の少なくとも一部に、前記リード線貫通用の貫通孔を設け、この貫通孔の非受光面側に、この貫通孔の周囲を囲みかつ一部に前記リード線引き出し用の開穴部を設けた耐熱性樹脂壁部を設け、かつ、耐熱性樹脂壁部の非受光面側に、貫通孔に対面して孔カバーを設け、前記貫通孔および開穴部から引き出したリード線を、外部の接続ケーブルに電気的に接続してなるものとする（請求項２の発明）。この構成によっても、リード線は、前記貫通孔および開穴部から容易に引き出すことができ、また、飛び火が発生して、万一接着性樹脂が燃焼したとしても、微小空隙を有する前記開穴部で、延焼がくい止められる。さらに、好ましくは、前記貫通孔および開穴部および端子箱内に、後述する請求項７の発明のように、耐熱性樹脂が充填された場合には、延焼の抑制効果は極めて大となる。
【００２１】
また、耐火性の表面保護部材と耐火性の裏面保護部材との間に、複数個の太陽電池素子を直列または並列接続した太陽電池を接着性樹脂により封止してなり、前記太陽電池の正極および負極のリード線を、前記裏面保護部材を貫通し、端子箱を介して外部の接続ケーブルに電気的に接続してなる太陽電池モジュールであって、前記裏面保護部材における前記太陽電池が形成された裏側の少なくとも一部に、前記リード線貫通用の矩形状の貫通孔を設け、この貫通孔の非受光面側に、この貫通孔の周囲の対向する２辺において裏面保護部材を折り曲げて立ち上げ、かつ各立ち上げた上部をさらに貫通孔の外方に直角に折り曲げてなる断面Ｌ字状の２個の立ち上げ隔壁部を設け、さらに、スライド式側板付き孔カバーを設け、このスライド式側板付き孔カバーは、前記対向する２個の断面Ｌ字状の立ち上げ隔壁部とその側板部とが係合してスライドし、かつ前記貫通孔の周囲の残りの２辺の内１辺に対応する側板部にリード貫通用の切り欠部を有する孔カバーとし、前記貫通孔および切り欠部から引き出したリード線を、外部の接続ケーブルに電気的に接続してなるものとする（請求項３の発明）。この構成によっても、前記請求項１または２の発明と同様の効果が得られる。
【００２２】
さらに前記請求項１ないし３の発明の実施態様としては、下記請求項４ないし８の発明が好ましい。即ち、耐火性向上と製造コスト低減の観点から、前記請求項１ないし３のいずれか１項に記載の太陽電池モジュールにおいて、前記裏面保護部材は鋼板とする（請求項４の発明）。
【００２３】
また、施工性の向上や軽量化の観点から、請求項１ないし４のいずれか１項に記載の太陽電池モジュールにおいて、前記表面保護部材はＥＴＦＥ等の難燃性樹脂シートとする（請求項５の発明）。
【００２４】
さらに、耐火性向上の観点から、請求項２または３に記載の太陽電池モジュールにおいて、前記孔カバーまたはスライド式側板付き孔カバーは、不燃性または難燃性の耐火材料からなるものとする（請求項６の発明）。
【００２５】
さらにまた、耐火性と電気絶縁性向上の観点から、請求項１ないし６のいずれか１項に記載の太陽電池モジュールにおいて、前記リード線が引き出されるスリット穴，貫通孔，切り欠部および端子箱内には、耐熱性樹脂を充填し、耐火保護およびリード線の電気絶縁保護をしてなるものとする（請求項７の発明）。
【００２６】
また、請求項１ないし７のいずれか１項に記載の太陽電池モジュールにおいて、前記太陽電池と表面保護部材との間に、ガラス不織布の補強層を備えるものとする（請求項８の発明）。この構成によれば、太陽電池の裏側の端子部に、延焼が及ぶ時間を、少なからず延長できるとともに、太陽電池モジュールの柔軟性を損なうことなしにモジュール強度を向上することができる。
【００２７】
【発明の実施の形態】
図面に基づき、本発明の実施例について以下に述べる。
【００２８】
図１ないし図７は、この発明に関わる太陽電池モジュールの実施例の模式的構成図を示し、各図にまたがって共通する部材には、同一番号を付して示す。
【００２９】
図１は、図２から図７の実施例に共通する太陽電池モジュールの模式的斜視図を示す。図１において、９は太陽電池、２は裏面保護部材、３は端子箱、４は接続ケーブル、５は接続コネクタであり、裏面保護部材２としては、本実施例では、アルミニウムを５５％含有する厚さ０．３５ｍｍのガルバリウム鋼板（川鉄鋼板社製レヂノカラーＧＬ）を用いた。
【００３０】
図２および図３は、請求項１の発明に関わる実施例を示し、図２は、前記図１におけるＡ−Ａ側断面図を示し、また図３は、図２におけるＢ部の拡大斜視図であって、この実施例で用いる裏面保護部材２の後述する絞り加工部を示す。
【００３１】
図２において、太陽電池９は、ガラス不織布（日本バイリーン社製キムラス）８とともに、接着性樹脂７（ブリヂストン社製ＥＶＡＥＶＡＳＡＦＥ）に埋設されている。太陽電池モジュールの受光表面は、表面保護部材６としてのＥＴＦＥ（エチレン−テトラフルオロエチレン共重合体、旭硝子社製）で覆われている。
【００３２】
前記鋼板製の裏面保護部材２には、例えば、長さ１０ｍｍ，高さ１ｍｍのスリットを設け、このスリットの長さを１辺とする正方形底面を有する箱状に非受光面側に絞り加工を行って、図３に示すような絞り加工部１１を設けた。図３において、絞り加工部１１の４個の立ち上がり部１１ａの内、一箇所にリード線１２を通すためのスリット穴１６を設ける。このスリット穴１６の寸法は幅１０ｍｍ，高さ１ｍｍである。なお、このスリット穴は、前記絞り加工を行なう前に穴開け加工を行なっておくことが望ましい。
【００３３】
次に前記太陽電池モジュールの製造工程について説明する。
【００３４】
まず、下から表面保護部材６（ＥＴＦＥ）、接着性樹脂７（ＥＶＡ）、ガラス不織布８、太陽電池９を順次重ね合わせる。太陽電池としては、耐熱性プラスチックフィルム（例えば、ポリイミドフィルム）を基板とするアモルファスシリコン薄膜太陽電池を用いた。この太陽電池９は、直列接続された図示しない複数個のユニットセルから構成されており、非受光面側の両端にはセルの＋極と−極とが設けられ、それぞれ配線材１０が取り付けられ、これにリード線１２が取り付けられている。
【００３５】
また、これとは別にガルバリウム鋼板のリード線取り出し部に幅１０ｍｍのスリットを設け、前述のように、非受光面側が凸になるように絞り加工を行った。
【００３６】
この加工を施した鋼板を前述の積層体にリード線の取り出し位置が合うように重ね合わせ、１５０℃で２０分間ラミネートした。なお、リード線としては厚さ０．１ｍｍ、幅４ｍｍの半田デイップ銅箔を素線とし、その両端を除いて全体を約３０ミクロンのＰＥＴ（ポリエチレンテレフタレート）樹脂で絶縁被覆処理したものを用いた。
【００３７】
ラミネート完了後、鋼板に端子箱１５をモジュールの非受光面側に耐熱性樹脂で接着して取り付け、リード線１２と外部ケーブル４の素線１４を半田接続した後に、端子箱内部を端子箱用の耐熱性樹脂充填材２４（信越化学製ＫＥ２００）で充填し、端子箱の蓋２５を取り付けた。なお、この充填の際、前記スリット穴１６とリード線１２との隙間に、図示しない絶縁用スペーサを予め挿填しておき、絶縁用スペーサおよびリード線を除く絞り加工部１１内の空間に、端子箱内部と共に耐熱性樹脂充填材２１（信越化学製ＫＥ２００）を、充填した。
【００３８】
次に、図４および図５について述べる。図４および図５は、請求項２の発明に関わる実施例を示し、図４は、前記図１におけるＡ−Ａ側断面図を示し、また図５は、図４におけるＣ部の拡大斜視図であって、この実施例で用いる裏面保護部材２のリード線引き出し部を示す。
【００３９】
本実施例では、鋼板７にリード線１２を取り出すための１辺が１ｃｍの正方形の貫通孔２３を開けた。この貫通孔２３を経由してリード線１２を鋼板の非受光面側に取り出した。この後、耐熱性樹脂充填材（信越化学製ＫＥ２００）により、開穴部２２を有する耐熱性樹脂壁部１７を鋼板の非受光面の前記貫通孔周辺に形成した。形成に際しては、壁形状成型用の治具を用いる。耐熱性樹脂壁部１７を形成後、さらに貫通孔部に耐熱性樹脂充填材２１（信越化学製ＫＥ２００）を充填し、１辺が２ｃｍの鋼板を孔カバー１８として接着した。この作業が完了の後、実施例１と同じ方法で端子箱１５を取り付けた。なお、本実施例では、貫通孔２３を正方形としたが、孔の形状は正方形に限定されず、矩形、円形、楕円形、小判形などでもよい。また、本実施例では裏面保護部材である鋼板と同じ材料を孔カバーとしたが、ステンレス鋼板やセラミックスの板など耐火材料であれば良い。さらに、図５ではリード線を通す開穴部２２には接着剤を敷設していないが、リード線を引き出した後、この部分に接着材を敷設してもよい。
【００４０】
次に、図６および図７について述べる。図６および図７は、請求項３の発明に関わる実施例を示し、図６は、前記図１におけるＡ−Ａ側断面図を示し、また図７は、図６におけるＤ部の拡大斜視図であって、この実施例で用いる裏面保護部材２のリード線引き出し部を示す。
【００４１】
この実施例では、裏面保護部材２には実施例１と同じ材料を用いたが、リード線取り出し部分には１辺の長さが１ｃｍの貫通孔２３を開けた後に、非受光面側に、前述の立上げ隔壁部２７を折り曲げ加工により、図７のように設けた。リード線１２を、貫通孔２３を通して外部に引き出した後、耐熱性樹脂充填材２１（信越化学製ＫＥ２００）を充填した後に、スライド式側板付き孔カバー１９を、その側板部１９ａにより、立上げ隔壁部２７に係合した。この際、リード線１２はスライド式側板付き孔カバー１９に設けた切り欠部２０を通して外部に引き出した。この後、実施例１と同じ方法で端子箱１５を取り付けた。
【００４２】
なお、図７において、前記側板部１９ａは、切り欠き部２０の内側に折り曲げた実施例を示すが、この折り曲げは省略することもできる。
【００４３】
【発明の効果】
この発明によれば、前述のように、耐火性の表面保護部材と耐火性の裏面保護部材との間に、複数個の太陽電池素子を直列または並列接続した太陽電池を接着性樹脂により封止してなり、前記太陽電池の正極および負極のリード線を、前記裏面保護部材を貫通し、端子箱を介して外部の接続ケーブルに電気的に接続してなる太陽電池モジュールであって、
前記裏面保護部材における前記太陽電池が形成された裏側の少なくとも一部に非受光面側に突出させた絞り加工部を設け、この絞り加工部の裏面保護部材の立ち上がり部の少なくとも一部に、前記リード線貫通用のスリット穴を設け、このスリット穴から引き出したリード線を、外部の接続ケーブルに電気的に接続してなるものとする、
または、前記裏面保護部材における前記太陽電池が形成された裏側の少なくとも一部に、前記リード線貫通用の貫通孔を設け、この貫通孔の非受光面側に、この貫通孔の周囲を囲みかつ一部に前記リード線引き出し用の開穴部を設けた耐熱性樹脂壁部を設け、かつ、耐熱性樹脂壁部の非受光面側に、貫通孔に対面して孔カバーを設け、前記貫通孔および開穴部から引き出したリード線を、外部の接続ケーブルに電気的に接続してなるものとする、
もしくは、前記裏面保護部材における前記太陽電池が形成された裏側の少なくとも一部に、前記リード線貫通用の矩形状の貫通孔を設け、この貫通孔の非受光面側に、この貫通孔の周囲の対向する２辺において裏面保護部材を折り曲げて立ち上げ、かつ各立ち上げた上部をさらに貫通孔の外方に直角に折り曲げてなる断面Ｌ字状の２個の立ち上げ隔壁部を設け、さらに、スライド式側板付き孔カバーを設け、このスライド式側板付き孔カバーは、前記対向する２個の断面Ｌ字状の立ち上げ隔壁部とその側板部とが係合してスライドし、かつ前記貫通孔の周囲の残りの２辺の内１辺に対応する側板部にリード貫通用の切り欠部を有する孔カバーとし、前記貫通孔および切り欠部から引き出したリード線を、外部の接続ケーブルに電気的に接続してなるものとすることにより、
耐火性に優れ、リード線を太陽電池が形成された有効発電領域の裏面側から引き出す構成を備え、かつ組み立て性に優れた太陽電池モジュールを提供することができる。
【図面の簡単な説明】
【図１】本発明の実施例に関わる太陽電池モジュールの模式的構成図
【図２】請求項１の発明に係る実施例の模式的構成図
【図３】図２におけるＢ部の拡大斜視図
【図４】請求項２の発明に係る実施例の模式的構成図
【図５】図４におけるＣ部の拡大斜視図
【図６】請求項３の発明に係る実施例の模式的構成図
【図７】図６におけるＤ部の拡大斜視図
【図８】従来の防火構造を有する太陽電池モジュールの一例の模式的構成図
【図９】従来の異なる防火構造を有する太陽電池モジュールの模式的構成図
【図１０】従来のさらに異なる防火構造を有する太陽電池モジュールの模式的構成図
【符号の説明】
２：裏面保護部材、３：端子取り出し部、４：接続ケーブル、５：接続コネクタ、６：表面保護部材、７：接着性樹脂、８：ガラス不織布、９：太陽電池、１１：絞り加工部、１１ａ：立ち上がり部、１２：リード線、１３：接続部、１４：素線、１５：端子箱、１６：スリット穴、１７：耐熱性樹脂壁部、１８：孔カバー、１９：スライド式側板付き孔カバー、１９ａ：側板部、２０：切り欠部、２１，２４：耐熱性樹脂充填材、２２：開穴部、２３：貫通孔、２５：端子箱の蓋、２７：立ち上げ隔壁部。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a solar cell module having improved fire resistance, and more particularly to a structure of a power lead lead-out device for extracting power generated by a solar cell to the outside.
[0002]
[Prior art]
As global environmental issues are highlighted, solar cells are expected to have great potential as clean renewable energy.
[0003]
Solar cells are roughly classified into crystalline solar cells and amorphous thin film solar cells. Production of crystalline solar cell modules using crystalline silicon as the main material has already begun on a commercial scale, but the structure is such that aluminum is used to cover the power generation element with filler and cover the light-receiving surface with glass. It is a common practice to attach a frame and fix it to a gantry installed on a roof or the like. This type of solar cell module has problems such as weight due to the use of glass and stable supply of crystalline silicon, which is a raw material of the solar cell.
[0004]
On the other hand, in the case of a thin-film solar cell module mainly using amorphous silicon, when a heat-resistant plastic film or the like is used as a substrate of the power generation element, the power generation element portion has flexibility, so it is applied to a gentle curved surface. Is possible and the range of use is expanded. For example, when manufacturing a steel plate integrated type solar cell module that takes advantage of this feature, a weather-resistant resin film is applied instead of a glass plate as a surface protection material on the light-receiving surface side, and the surrounding area where the power generation element is not arranged By bending, it becomes possible to supply lightweight solar cell roofs with the same workability as ordinary steel sheet roofing materials, and it will be applied to these markets, which have been difficult to apply. It is thought to be. Further, since the amount of silicon used as a raw material is small, there is no problem in supply of silicon.
[0005]
By the way, when the solar cell module is mounted on the roof of a house, it is one of the necessary requirements to be approved as a building to meet laws and regulations on fire prevention. For example, in the case of a wooden building, the roof is to be covered with a noncombustible material in order to prevent the spread of fire due to a fire. For this reason, when a solar cell having a conventional structure is mounted, a metal plate such as a steel plate as described above is used for a back surface protection member in order to enhance the fire resistance of the solar cell as a roof material, and a surface protection member is used. Preferably, a non-combustible glass plate is used in terms of fire resistance. Further, although the fire resistance is inferior to the glass plate, a flame-retardant resin film such as ETFE (ethylene-tetrafluoroethylene copolymer) is used as a surface protection member from the viewpoint of improving workability and reducing the weight. Can be
[0006]
As described above, a conventional example of a building material-integrated solar cell module using a steel plate as a back surface protection member will be described below (see Patent Documents 1 and 2).
[0007]
FIG. 8 is a drawing showing a solar cell module described in Patent Document 1. 8, 101 is a photovoltaic element, 102 is a terminal box, 103 is a power take-out cable, 104 is a conductive member, 105 is a back cover material (steel plate), 106 is a terminal extraction hole, and 107 is a surface cover material ( For example, ETFE), 108 is a filler (for example, EVA). In this example, the terminal covering hole 106 is provided in a portion of the back surface covering material 105 where no photovoltaic element is provided, and the terminal is taken out through the conductive member 104 electrically connected to the photovoltaic element 101. .
[0008]
In general, when testing the fire resistance performance of a solar cell module, a test is performed in which wood is burned on the light receiving surface of the module, assuming a spark from the light receiving surface side. Although ETFE of the surface covering material is a flame retardant material, a hole pierces with the elapse of time due to a spark and the EVA of the filler material spreads, but when the back surface covering material is a steel material, the fire spreads to the roof base plate. , Is considerably suppressed. However, there is a case where the fire spreads through the terminal extraction hole. In the case of the above-mentioned Patent Document 1, the entire surface of the terminal extraction hole is covered with the conductive member 104 itself provided on the light receiving surface side of the back surface coating material. The spread of fire to steel is suppressed as much as possible.
[0009]
However, even with the above configuration, there is a danger that the module may spread through the terminal extraction hole due to the heat deformation of the module after the spark, etc. In order to solve this problem, the solar cell disclosed in Patent Document 2 and shown in FIG. In the module, a closing means 308 made of a non-combustible material, a semi-combustible material or a flame-retardant material is provided in a terminal taking-out hole provided in a galvanized steel sheet 301 as a back surface material, and this closing means is connected to a solar cell element. The fireproof performance is improved by inserting the lead wires inserted into the terminal box and drawing out the lead wires to the terminal box. The other members (302 to 307 and 309) and the module configuration in FIG. 9 are the same as those in FIG.
[0010]
Similarly to the above Patent Document 2, Patent Document 3 discloses a configuration in which a lead wire connected to a solar cell element is led out to a terminal box via a member made of a quasi-incombustible material or a flame-retardant material. It has been disclosed. Japanese Patent Application Laid-Open Publication No. H11-157, pp. 9-27, cited in the description of the claims of the reference, "a plurality of photoelectric conversion elements arranged in a plane and a light-transmitting plate arranged on the light receiving surface side of the photoelectric conversion element. And a back cover member arranged on the back side of the photoelectric conversion element, a filler filled between the translucent plate and the back cover member, and a lead wire for extracting photoelectric output to the outside In the module, the back cover member has an opening through which a lead wire passes, and a mat member for covering the opening is arranged inside the back cover member. "The back cover member and the mat member are made of a material containing the same metal foil, and an opening of a lead wire provided in the back cover member and a slit-shaped lead provided in the mat member are provided. Is that wherein "to be a structure in which shifting the position of the opening for a line through.
[0011]
Further, as in Patent Document 3, a solar cell module having a configuration in which openings for penetrating lead wires are provided in two stages and the positions thereof are shifted is disclosed in Patent Document 4 by the same applicant as the present application. .
[0012]
FIG. 10 shows a configuration of a module disclosed in Patent Document 4. This module is configured by sealing a solar cell 112 with an adhesive resin 113 between a front surface protection member 111 made of glass, a rear surface protection member 121 made of steel plate, and a side metal frame 110. In a solar cell module in which the internal lead wires of the positive electrode and the negative electrode are electrically connected to external lead wires via connection terminals, an intermediate protective member 114 is provided between the front surface protective member 111 and the rear surface protective member 121, The solar cell 112 is sealed between the surface protective member, the intermediate protective member, and the metal frame via an adhesive resin, and the internal lead wire 117 pulled out through the intermediate protective member 114 is subjected to intermediate protection. It is electrically connected to an external lead wire 118 via a connection terminal in a terminal box 119 provided between the member and the back surface protection member, and the external lead wire passes through the back surface protection member 121 from the terminal box. It is set to constitute pulled out to the outside. "
[0013]
[Patent Document 1]
JP-A-2000-244001 (page 4, FIG. 1)
[Patent Document 2]
JP-A-2000-244000 (page 3-8, FIG. 1)
[Patent Document 3]
JP-A-2001-102616 (pages 4 to 5, FIGS. 1 and 3)
[Patent Document 4]
JP-A-2002-111032 (page 4, FIG. 1)
[0014]
[Problems to be solved by the invention]
By the way, the solar cell modules disclosed in Patent Documents 2 to 4 are compared with those described in Patent Document 1 in fireproof performance, especially from the light-receiving surface side of the module, through the lead wire penetration portion of the back surface protection member. Although the fireproofing performance for preventing the spread of fire to the roof is improved through the method, there are the following problems.
[0015]
First, in the case of Patent Document 2, it is necessary to attach a closing means so that the closing means (308 in FIG. 9) does not fall off in the event of a fire. For this reason, the closing means is provided with a collar-shaped fall-off prevention part. Further, since the lead wires are drawn out from the back side of the effective power generation area in which the solar cells are formed, it is not easy to assemble a module related to lead wire drawing. Also, in the case of a configuration in which openings for penetrating lead wires are provided at two-stages displaced from each other as in Patent Documents 3 and 4, there is a difference in the degree and quality of work, and the Assembly is not as easy.
[0016]
Therefore, the solar cell modules disclosed in Patent Documents 2 to 4 cannot be said to have a configuration excellent in mass productivity. From the viewpoint of mass productivity, it is more preferable that the lead wire is drawn out of the effective power generation area where the solar cell is formed as in Patent Document 1, but in this case, the space factor and the appearance Is not preferred.
[0017]
The present invention has been made in view of the above points, and an object of the present invention is to provide a structure that has excellent fire resistance and extends a lead wire from the back surface side of an effective power generation region in which a solar cell is formed, and An object of the present invention is to provide a solar cell module excellent in assemblability.
[0018]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the present invention, a solar cell in which a plurality of solar cell elements are connected in series or in parallel between a fire-resistant surface protection member and a fire-resistant back surface protection member by an adhesive resin. A sealed solar cell module, wherein the positive and negative lead wires of the solar cell penetrate the back surface protection member and are electrically connected to an external connection cable via a terminal box,
At least a part of the back side where the solar cell is formed in the back surface protection member is provided with a drawn part protruding toward the non-light receiving surface side, and at least a part of a rising part of the back surface protection member of the drawn part, A slit hole for penetrating the lead wire is provided, and the lead wire drawn out from the slit hole is electrically connected to an external connection cable (the invention of claim 1).
[0019]
According to the above configuration, the lead wire can be easily pulled out from the slit hole, so that the assembling becomes easy. Also, even if a spontaneous fire occurs and the adhesive resin burns, the spread of the fire is prevented by the slit holes having the minute voids. Further, preferably, when the slit hole and the terminal box are filled with a heat-resistant resin as in the invention of claim 7 described later, the effect of suppressing the spread of fire becomes extremely large. In addition, as this heat resistant resin, a resin that is liquid at room temperature and cures at room temperature can be applied, and in this case, the assemblability is not impaired.
[0020]
The above object can also be achieved by the invention of claim 2 or 3 below. That is, a solar cell in which a plurality of solar cell elements are connected in series or in parallel between a fire-resistant surface protection member and a fire-resistant back surface protection member is sealed with an adhesive resin, and the positive electrode of the solar cell And a lead wire of the negative electrode penetrates the back surface protection member, and is electrically connected to an external connection cable via a terminal box, wherein the solar cell in the back surface protection member is formed. At least a part of the back side is provided with a through hole for penetrating the lead wire, and a non-light receiving surface side of the through hole surrounds the periphery of the through hole and partially has an opening for leading the lead wire. The provided heat-resistant resin wall portion is provided, and a hole cover is provided on the non-light-receiving surface side of the heat-resistant resin wall portion so as to face the through-hole, and a lead wire drawn from the through-hole and the hole is connected to the outside. Electrically connected to the connection cable That Is to (the invention of claim 2). According to this configuration, the lead wire can be easily pulled out from the through-hole and the hole, and even if a spontaneous fire occurs and the adhesive resin is burned, the hole having a minute void is formed. In part, fire spread is stopped. More preferably, when the heat-resistant resin is filled in the through-hole, the opening, and the terminal box as described in claim 7 described below, the effect of suppressing the spread of fire is extremely large.
[0021]
Further, a solar cell in which a plurality of solar cell elements are connected in series or in parallel between a fire-resistant surface protection member and a fire-resistant back surface protection member is sealed with an adhesive resin, and the positive electrode of the solar cell And a lead wire of the negative electrode penetrates the back surface protection member, and is electrically connected to an external connection cable via a terminal box, wherein the solar cell in the back surface protection member is formed. At least a part of the back side is provided with a rectangular through hole for penetrating the lead wire, and the back surface protection member is bent and stands on the non-light receiving surface side of the through hole at two opposing sides around the through hole. The two raised partition walls having an L-shaped cross section are further provided by bending each raised upper part at right angles to the outside of the through-hole, and further, a slide cover with a side plate is provided. Side plate The perforated cover is slid by engagement of the opposed two rising partition walls having an L-shaped cross section and their side plates, and corresponds to one of the remaining two sides around the through hole. A hole cover having a cutout portion for lead penetration in a side plate portion to be formed, and a lead wire drawn out from the through hole and the cutout portion is electrically connected to an external connection cable. Invention). According to this configuration, the same effect as that of the first or second aspect of the invention can be obtained.
[0022]
Further, as the embodiments of the first to third aspects of the present invention, the following fourth to eighth aspects of the present invention are preferable. That is, from the viewpoint of improving fire resistance and reducing manufacturing costs, in the solar cell module according to any one of claims 1 to 3, the back surface protection member is a steel plate (the invention of claim 4).
[0023]
Further, from the viewpoint of improving workability and reducing the weight, in the solar cell module according to any one of claims 1 to 4, the surface protection member is a flame-retardant resin sheet such as ETFE (claim 5). Invention).
[0024]
Further, from the viewpoint of improving fire resistance, in the solar cell module according to claim 2 or 3, the hole cover or the hole cover with a slide-type side plate is made of a non-combustible or flame-retardant fire-resistant material. Item 6).
[0025]
The solar cell module according to any one of claims 1 to 6, further comprising: a slit hole, a through hole, a notch, and a terminal box from which the lead wire is drawn from the viewpoint of improving fire resistance and electrical insulation. The inside is filled with a heat-resistant resin to provide fire protection and electrical insulation protection for the lead wires (the invention of claim 7).
[0026]
Further, in the solar cell module according to any one of claims 1 to 7, a reinforcing layer of a glass nonwoven fabric is provided between the solar cell and the surface protection member (the invention of claim 8). According to this configuration, the time that the fire spreads to the terminal portion on the back side of the solar cell can be extended considerably, and the module strength can be improved without impairing the flexibility of the solar cell module.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0028]
FIGS. 1 to 7 show schematic structural diagrams of embodiments of a solar cell module according to the present invention, and members common to the drawings are denoted by the same reference numerals.
[0029]
FIG. 1 is a schematic perspective view of a solar cell module common to the embodiments of FIGS. 2 to 7. In FIG. 1, 9 is a solar cell, 2 is a back surface protection member, 3 is a terminal box, 4 is a connection cable, 5 is a connection connector, and in this embodiment, the back surface protection member 2 contains 55% of aluminum. A 0.35 mm-thick galvalume steel plate (Reno Color GL manufactured by Kawa Iron Steel Co., Ltd.) was used.
[0030]
2 and 3 show an embodiment according to the first aspect of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is an enlarged perspective view of a portion B in FIG. This shows a later-described drawing portion of the back surface protection member 2 used in this embodiment.
[0031]
In FIG. 2, a solar cell 9 is embedded in an adhesive resin 7 (EVA EVASAFE manufactured by Bridgestone) together with a glass nonwoven fabric (Kimras manufactured by Japan Vilene). The light receiving surface of the solar cell module is covered with ETFE (ethylene-tetrafluoroethylene copolymer, manufactured by Asahi Glass Co., Ltd.) as a surface protection member 6.
[0032]
For example, a slit having a length of 10 mm and a height of 1 mm is provided on the back surface protection member 2 made of a steel plate, and a drawing process is performed on the non-light-receiving surface side in a box shape having a square bottom surface having the length of the slit as one side. Then, a drawing portion 11 as shown in FIG. 3 was provided. In FIG. 3, a slit hole 16 for passing the lead wire 12 is provided in one of the four rising portions 11a of the drawing portion 11. The dimensions of the slit hole 16 are 10 mm in width and 1 mm in height. It is desirable that the slit hole be drilled before the drawing.
[0033]
Next, a manufacturing process of the solar cell module will be described.
[0034]
First, the surface protection member 6 (ETFE), the adhesive resin 7 (EVA), the glass nonwoven fabric 8, and the solar cell 9 are sequentially stacked from below. As the solar cell, an amorphous silicon thin film solar cell using a heat-resistant plastic film (for example, a polyimide film) as a substrate was used. The solar cell 9 is composed of a plurality of unit cells (not shown) connected in series, and a positive electrode and a negative electrode of the cell are provided at both ends on the non-light receiving surface side, and a wiring member 10 is attached thereto. , And a lead wire 12 is attached thereto.
[0035]
Separately, a slit having a width of 10 mm was provided in the lead wire take-out portion of the galvalume steel plate, and as described above, drawing was performed so that the non-light-receiving surface side became convex.
[0036]
The steel plate subjected to this processing was superimposed on the above-mentioned laminated body so that the lead wire take-out position was matched, and laminated at 150 ° C. for 20 minutes. As the lead wire, a solder dip copper foil having a thickness of 0.1 mm and a width of 4 mm was used as an element wire, and the entire surface except for both ends was subjected to insulation coating with a PET (polyethylene terephthalate) resin of about 30 microns. .
[0037]
After lamination, the terminal box 15 is attached to the non-light-receiving surface side of the module with a heat-resistant resin and attached to the steel plate, and the lead wire 12 and the element wire 14 of the external cable 4 are connected by soldering. And the terminal box lid 25 was attached. At the time of this filling, an insulating spacer (not shown) is previously inserted into a gap between the slit hole 16 and the lead wire 12, and the space in the drawing portion 11 excluding the insulating spacer and the lead wire is inserted into the space. A heat-resistant resin filler 21 (KE200 manufactured by Shin-Etsu Chemical) was filled together with the inside of the terminal box.
[0038]
Next, FIGS. 4 and 5 will be described. 4 and 5 show an embodiment according to the second aspect of the present invention, FIG. 4 is a sectional view taken along the line AA in FIG. 1, and FIG. 5 is an enlarged perspective view of a portion C in FIG. 2 shows a lead wire lead-out portion of the back surface protection member 2 used in this embodiment.
[0039]
In this embodiment, a square through hole 23 having a side of 1 cm is formed in the steel plate 7 for taking out the lead wire 12. The lead wire 12 was taken out to the non-light-receiving surface side of the steel sheet via the through hole 23. Thereafter, a heat-resistant resin wall portion 17 having an opening 22 was formed around the through hole on the non-light-receiving surface of the steel plate using a heat-resistant resin filler (KE200 manufactured by Shin-Etsu Chemical Co., Ltd.). At the time of formation, a jig for molding a wall shape is used. After the heat-resistant resin wall portion 17 was formed, the through-hole portion was further filled with a heat-resistant resin filler 21 (KE200 manufactured by Shin-Etsu Chemical Co., Ltd.), and a steel plate having a side of 2 cm was bonded as the hole cover 18. After this operation was completed, the terminal box 15 was attached in the same manner as in Example 1. In the present embodiment, the through hole 23 is square, but the shape of the hole is not limited to square, and may be rectangular, circular, elliptical, oval, or the like. In the present embodiment, the hole cover is made of the same material as the steel plate as the back surface protection member. However, any other fire-resistant material such as a stainless steel plate or a ceramic plate may be used. Further, in FIG. 5, the adhesive is not laid on the opening portion 22 through which the lead wire passes, but after the lead wire is drawn out, an adhesive may be laid on this portion.
[0040]
Next, FIGS. 6 and 7 will be described. 6 and 7 show an embodiment according to the third aspect of the present invention, FIG. 6 is a sectional view taken along the line AA in FIG. 1, and FIG. 7 is an enlarged perspective view of a portion D in FIG. 2 shows a lead wire lead-out portion of the back surface protection member 2 used in this embodiment.
[0041]
In this embodiment, the same material as that of the first embodiment was used for the back surface protection member 2. However, after forming a through hole 23 having a side length of 1 cm on the lead wire take-out portion, on the non-light receiving surface side, The above-mentioned rising partition part 27 was provided as shown in FIG. 7 by bending. After the lead wire 12 is drawn out through the through hole 23 and filled with a heat-resistant resin filler 21 (KE200 manufactured by Shin-Etsu Chemical Co., Ltd.), the hole-type cover 19 with a slide-type side plate is raised by the side plate portion 19a. Engaged with part 27. At this time, the lead wire 12 was drawn out through a notch 20 provided in the hole cover 19 with a slide-type side plate. Thereafter, the terminal box 15 was attached in the same manner as in Example 1.
[0042]
FIG. 7 shows an embodiment in which the side plate portion 19a is bent inside the notch portion 20, but this bending may be omitted.
[0043]
【The invention's effect】
According to the present invention, as described above, a solar cell in which a plurality of solar cell elements are connected in series or in parallel between a fire-resistant surface protection member and a fire-resistant back surface protection member is sealed with an adhesive resin. A solar cell module comprising a lead wire of a positive electrode and a negative electrode of the solar cell, penetrating the back surface protective member, and electrically connected to an external connection cable via a terminal box,
At least a part of the back side where the solar cell is formed in the back surface protection member is provided with a drawn part protruding toward the non-light receiving surface side, and at least a part of a rising part of the back surface protection member of the drawn part, A slit hole for lead wire penetration is provided, and a lead wire drawn out of the slit hole is electrically connected to an external connection cable.
Alternatively, at least a part of the back surface where the solar cell is formed in the back surface protection member is provided with a through hole for penetrating the lead wire, and the non-light receiving surface side of the through hole surrounds the periphery of the through hole and A heat-resistant resin wall portion provided with an opening for drawing out the lead wire is provided in a part thereof, and a hole cover is provided on the non-light receiving surface side of the heat-resistant resin wall portion so as to face the through hole. The lead wire drawn out of the hole and the hole shall be electrically connected to an external connection cable,
Alternatively, a rectangular through hole for penetrating the lead wire is provided on at least a part of the back surface of the back surface protection member where the solar cell is formed, and the through hole is provided on the non-light receiving surface side of the through hole around the through hole. And two rising partition walls having an L-shaped cross section formed by bending the back surface protection member on two opposite sides of the through-hole and further bending each of the raised upper portions at right angles to the outside of the through hole. A hole cover with a slide-type side plate is provided. The slide cover with the slide-type side plate is engaged with the two opposing rising partition walls having an L-shaped cross section and the side plate, and slides, and A hole cover having a cut-out portion for penetrating leads is provided on a side plate portion corresponding to one of the remaining two sides around the hole, and a lead wire drawn out from the through-hole and the cut-out portion is connected to an external connection cable. Electrical connection By what will become,
It is possible to provide a solar cell module that has excellent fire resistance, has a configuration in which a lead wire is drawn out from the back side of the effective power generation region in which the solar cells are formed, and has excellent assemblability.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a solar cell module according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of an embodiment according to the invention of claim 1. FIG. 3 is an enlarged perspective view of a portion B in FIG. FIG. 4 is a schematic configuration diagram of an embodiment according to the invention of claim 2; FIG. 5 is an enlarged perspective view of a portion C in FIG. 4; FIG. 6 is a schematic configuration diagram of an embodiment according to the invention of claim 3; 7 is an enlarged perspective view of a portion D in FIG. 6; FIG. 8 is a schematic configuration diagram of an example of a conventional solar cell module having a fire protection structure; FIG. 9 is a schematic configuration of a conventional solar cell module having a different fire protection structure. FIG. 10 is a schematic configuration diagram of a conventional solar cell module having a further different fire prevention structure.
2: back surface protection member, 3: terminal extraction portion, 4: connection cable, 5: connection connector, 6: surface protection member, 7: adhesive resin, 8: glass nonwoven fabric, 9: solar cell, 11: drawn portion, 11a: rising portion, 12: lead wire, 13: connection portion, 14: element wire, 15: terminal box, 16: slit hole, 17: heat-resistant resin wall portion, 18: hole cover, 19: hole with sliding side plate. Cover, 19a: side plate, 20: cutout, 21, 24: heat-resistant resin filler, 22: open hole, 23: through hole, 25: cover of terminal box, 27: rising partition.

Claims

耐火性の表面保護部材と耐火性の裏面保護部材との間に、複数個の太陽電池素子を直列または並列接続した太陽電池を接着性樹脂により封止してなり、前記太陽電池の正極および負極のリード線を、前記裏面保護部材を貫通し、端子箱を介して外部の接続ケーブルに電気的に接続してなる太陽電池モジュールであって、
前記裏面保護部材における前記太陽電池が形成された裏側の少なくとも一部に非受光面側に突出させた絞り加工部を設け、この絞り加工部の裏面保護部材の立ち上がり部の少なくとも一部に、前記リード線貫通用のスリット穴を設け、このスリット穴から引き出したリード線を、外部の接続ケーブルに電気的に接続してなることを特徴とする太陽電池モジュール。A solar cell in which a plurality of solar cell elements are connected in series or in parallel between a fire-resistant surface protection member and a fire-resistant back surface protection member is sealed with an adhesive resin, and a positive electrode and a negative electrode of the solar cell A solar cell module formed by penetrating the back surface protection member and electrically connecting to an external connection cable via a terminal box,
At least a part of the back side where the solar cell is formed in the back surface protection member is provided with a drawn part protruding toward the non-light receiving surface side, and at least a part of a rising part of the back surface protection member of the drawn part, A solar cell module comprising a slit hole for penetrating a lead wire, and a lead wire drawn out of the slit hole is electrically connected to an external connection cable.

耐火性の表面保護部材と耐火性の裏面保護部材との間に、複数個の太陽電池素子を直列または並列接続した太陽電池を接着性樹脂により封止してなり、前記太陽電池の正極および負極のリード線を、前記裏面保護部材を貫通し、端子箱を介して外部の接続ケーブルに電気的に接続してなる太陽電池モジュールであって、
前記裏面保護部材における前記太陽電池が形成された裏側の少なくとも一部に、前記リード線貫通用の貫通孔を設け、この貫通孔の非受光面側に、この貫通孔の周囲を囲みかつ一部に前記リード線引き出し用の開穴部を設けた耐熱性樹脂壁部を設け、かつ、耐熱性樹脂壁部の非受光面側に、貫通孔に対面して孔カバーを設け、前記貫通孔および開穴部から引き出したリード線を、外部の接続ケーブルに電気的に接続してなることを特徴とする太陽電池モジュール。A solar cell in which a plurality of solar cell elements are connected in series or in parallel between a fire-resistant surface protection member and a fire-resistant back surface protection member is sealed with an adhesive resin, and a positive electrode and a negative electrode of the solar cell A solar cell module formed by penetrating the back surface protection member and electrically connecting to an external connection cable via a terminal box,
A through hole for penetrating the lead wire is provided on at least a part of the back surface on which the solar cell is formed in the back surface protection member, and a part surrounding the through hole on the non-light receiving surface side of the through hole. A heat-resistant resin wall portion provided with an opening for leading the lead wire is provided, and a hole cover is provided on the non-light-receiving surface side of the heat-resistant resin wall portion so as to face the through-hole. A solar cell module, wherein a lead wire drawn out from an opening is electrically connected to an external connection cable.

耐火性の表面保護部材と耐火性の裏面保護部材との間に、複数個の太陽電池素子を直列または並列接続した太陽電池を接着性樹脂により封止してなり、前記太陽電池の正極および負極のリード線を、前記裏面保護部材を貫通し、端子箱を介して外部の接続ケーブルに電気的に接続してなる太陽電池モジュールであって、
前記裏面保護部材における前記太陽電池が形成された裏側の少なくとも一部に、前記リード線貫通用の矩形状の貫通孔を設け、この貫通孔の非受光面側に、この貫通孔の周囲の対向する２辺において裏面保護部材を折り曲げて立ち上げ、かつ各立ち上げた上部をさらに貫通孔の外方に直角に折り曲げてなる断面Ｌ字状の２個の立ち上げ隔壁部を設け、さらに、スライド式側板付き孔カバーを設け、このスライド式側板付き孔カバーは、前記対向する２個の断面Ｌ字状の立ち上げ隔壁部とその側板部とが係合してスライドし、かつ前記貫通孔の周囲の残りの２辺の内１辺に対応する側板部にリード貫通用の切り欠部を有する孔カバーとし、前記貫通孔および切り欠部から引き出したリード線を、外部の接続ケーブルに電気的に接続してなることを特徴とする太陽電池モジュール。A solar cell in which a plurality of solar cell elements are connected in series or in parallel between a fire-resistant surface protection member and a fire-resistant back surface protection member is sealed with an adhesive resin, and a positive electrode and a negative electrode of the solar cell A solar cell module formed by penetrating the back surface protection member and electrically connecting to an external connection cable via a terminal box,
A rectangular through hole for penetrating the lead wire is provided on at least a part of the back surface on which the solar cell is formed in the back surface protection member, and a non-light receiving surface side of the through hole is opposed to the periphery of the through hole. On the two sides to be bent, the rear surface protective member is bent and raised, and each raised upper portion is further bent outside at right angles to the outside of the through hole to provide two rising partition walls having an L-shaped cross section, and further, slide. A hole-type cover with a side plate is provided. The slide-type hole cover with a side plate is slid by engagement of the opposed two rising partition walls having an L-shaped cross section and the side plate, and slides through the through-hole. A side cover corresponding to one of the remaining two sides of the periphery is a hole cover having a cutout for lead penetration, and the lead wire drawn out of the throughhole and the cutout is electrically connected to an external connection cable. Connected to Solar cell module which is characterized.

請求項１ないし３のいずれか１項に記載の太陽電池モジュールにおいて、前記裏面保護部材は鋼板とすることを特徴とする太陽電池モジュール。The solar cell module according to any one of claims 1 to 3, wherein the back surface protection member is a steel plate.

請求項１ないし４のいずれか１項に記載の太陽電池モジュールにおいて、前記表面保護部材はＥＴＦＥ等の難燃性樹脂シートとすることを特徴とする太陽電池モジュール。5. The solar cell module according to claim 1, wherein the surface protection member is a flame-retardant resin sheet such as ETFE. 6.

請求項２または３に記載の太陽電池モジュールにおいて、前記孔カバーまたはスライド式側板付き孔カバーは、不燃性または難燃性の耐火材料からなることを特徴とする太陽電池モジュール。4. The solar cell module according to claim 2, wherein the hole cover or the hole cover with a slide-type side plate is made of a nonflammable or flame-retardant refractory material. 5.

請求項１ないし６のいずれか１項に記載の太陽電池モジュールにおいて、前記リード線が引き出されるスリット穴，貫通孔，切り欠部および端子箱内には、耐熱性樹脂を充填し、耐火保護およびリード線の電気絶縁保護をしてなることを特徴とする太陽電池モジュール。The solar cell module according to any one of claims 1 to 6, wherein the slit hole, the through hole, the cutout portion, and the terminal box from which the lead wire is drawn out are filled with a heat-resistant resin to provide fire protection and protection. A solar cell module characterized by providing electrical insulation protection for a lead wire.

請求項１ないし７のいずれか１項に記載の太陽電池モジュールにおいて、前記太陽電池と表面保護部材との間に、ガラス不織布の補強層を備えることを特徴とする太陽電池モジュール。The solar cell module according to any one of claims 1 to 7, further comprising a reinforcing layer of a glass nonwoven fabric between the solar cell and a surface protection member.