JP2015088755A - 太陽電池モジュール及びその製造方法 - Google Patents
太陽電池モジュール及びその製造方法 Download PDFInfo
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Abstract
Description
することができ、工程の歩留まりをさらに向上させることができる。
Claims (29)
- 半導体基板の背面に形成され互いに平行するように形成される複数の第1電極及び複数の第2電極と、前記複数の第1電極に接続される第1補助電極と、前記複数の第2電極に接続される第2補助電極とを含む第1太陽電池及び第2太陽電池と、
前記第1太陽電池の第1補助電極と前記第2太陽電池の第2補助電極を電気的に互に接続するインターコネクタとを含む太陽電池モジュール。 - 前記インターコネクタと前記第1及び第2太陽電池の第1及び第2補助電極は、互いに異なる材質を含む、請求項1に記載の太陽電池モジュール。
- 前記インターコネクタと前記第1及び第2太陽電池の第1及び第2補助電極は、幅、厚さ、層構造または平面パターンの内の少なくともいずれか1つが、異なる、請求項1に記載の太陽電池モジュール。
- 前記インターコネクタと前記第1及び第2太陽電池の第1及び第2補助電極は、導電性接着剤によって互に接続される、請求項1に記載の太陽電池モジュール。
- 前記第1太陽電池の第1及び第2補助電極と前記第2太陽電池の第1及び第2補助電極は、互いに空間的に離隔されている、請求項1に記載の太陽電池モジュール。
- 前記太陽電池モジュールは、
前記インターコネクタによって前記第1太陽電池と、前記第2太陽電池が互いに接続されるセルストリングの前面の上に位置する前面ガラス基板と、
前記前面ガラス基板と、前記セルストリングの間に位置する上部封止材と、
前記セルストリングの背面に位置する下部封止材と、
前記下部封止材の背面に位置する背面シートとをさらに含む、請求項1に記載の太陽電池モジュール。 - 前記第1太陽電池及び前記第2太陽電池のそれぞれにおいて、
前記第1補助電極は、前記インターコネクタと接続される第1補助電極パッドとをさらに含み、
前記第2補助電極は、前記インターコネクタと接続される第2補助電極パッドとをさらに含む、請求項1に記載の太陽電池モジュール。 - 前記第2補助電極パッドと、前記第1補助電極パッドのそれぞれは、前記半導体基板が、重畳する第1領域と、前記半導体基板が重畳しない第2領域を含む、請求項7に記載の太陽電池モジュール。
- 前記第1太陽電池に含まれる第1補助電極パッドと前記第2太陽電池に含まれる第2補助電極パッドは、互いに離隔されている、請求項7に記載の太陽電池モジュール。
- 前記インターコネクタは、
前記第1太陽電池に含まれる第1補助電極パッドと前記第2太陽電池に含まれる第2補助電極パッドを互いに電気的に接続する、請求項7に記載の太陽電池モジュール。 - 前記インターコネクタは、
前記第1太陽電池に含まれる第1補助電極パッドの第2領域と前記第2太陽電池に含まれる第2補助電極パッドの第2領域を互いに電気的に接続する、請求項8に記載の太陽電池モジュール。 - 前記インターコネクタと前記第1補助電極パッド、または前記インターコネクタと前記第2補助電極パッドは、導電性接着剤によって電気的に接続される、請求項10に記載の太陽電池モジュール。
- 前記インターコネクタと前記第1補助電極パッド、または前記インターコネクタと前記第2補助電極パッドは、物理的に直接接触して電気的に接続される、請求項10に記載の太陽電池モジュール。
- 前記インターコネクタは、前面の表面に凹凸が形成されており、厚さが均一でない、請求項1に記載の太陽電池モジュール。
- 前記インターコネクタは、厚さが均一であり、ジグザグ(zigzag)形態を有する、請求項1に記載の太陽電池モジュール。
- 前記太陽電池モジュールは、
前記第1太陽電池及び前記第2太陽電池が、前記インターコネクタによって第1方向に直列に接続されるそれぞれの第1セルストリングと第2セルストリングを含み、
前記第1セルストリングと、前記第2セルストリングを第2方向に直列に接続させる導電性リボン(ribbon)とをさらに含む、請求項1に記載の太陽電池モジュール。 - 互いに平行するように形成される複数の第1電極と複数の第2電極が形成された半導体基板の背面に互いに平行するように第1補助電極と第2補助電極が付着されたそれぞれの第1太陽電池と第2太陽電池を形成するセル形成段階と、
前記第1太陽電池の前記第1補助電極と前記第2太陽電池の前記第2補助電極をインターコネクタで接続するセルストリング形成段階と、
前記セルストリングを前面ガラス基板上に配置する段階と、
前記セルストリングの上に背面シートを配置する段階とを含む太陽電池モジュールの製造方法。 - 前記セル形成段階は、前記第1補助電極と前記第2補助電極が形成された絶縁性部材を半導体基板の背面に付着する付着段階と、
前記絶縁性部材を前記第1補助電極と前記第2補助電極から分離する剥離工程と、を含む、請求項17に記載の太陽電池モジュールの製造方法。 - 前記第1補助電極と前記第2補助電極は、架橋剤により前記絶縁性部材に一時的に付着している、請求項18に記載の太陽電池モジュールの製造方法。
- 前記架橋剤は、熱可塑性樹脂を含む、請求項19に記載の太陽電池モジュールの製造方法。
- 前記付着段階において、前記第1補助電極と前記複数の第1電極との間、及び前記第2補助電極と前記複数の第2電極との間には、導電性接着剤によって互いに接着されて接続される、請求項18に記載の太陽電池モジュールの製造方法。
- 前記剥離段階の工程温度は、前記付着段階の工程温度より低い、請求項18に記載の太陽電池モジュールの製造方法。
- 前記付着段階の工程温度は130℃〜250℃の間であり、前記剥離段階の工程温度は80℃〜130℃の間である、請求項22に記載の太陽電池モジュールの製造方法。
- 前記付着段階によって前記第2補助電極が前記複数の第2電極に付着された後、冷却されたとき、前記剥離段階が実行される、請求項18に記載の太陽電池モジュールの製造方法。
- 前記剥離段階は、前記付着段階が終了した後に、別の熱処理またはUV照射によって実行される、請求項18に記載の太陽電池モジュールの製造方法。
- 前記セルストリング形成段階において、
前記インターコネクタは、
一側が前記第1太陽電池の前記第1補助電極に含まれる第1補助電極パッドに付着され、他側が前記第2太陽電池の前記第2補助電極に含まれる第2補助電極パッドに付着される、請求項17に記載の太陽電池モジュールの製造方法。 - 前記セル形成段階は、
前記半導体基板の背面に形成された前記複数の第1電極と前記複数の第2電極を被覆するように前記半導体基板の背面全体に絶縁層を形成する絶縁層形成段階と、
前記複数の第1電極と前記複数の第2電極が露出するように前記絶縁層の一部を局部的に開口(open)させる開口段階と、
前記絶縁層において開口された一部分を介して露出される前記複数の第1電極と前記複数の第2電極の上部を含み前記絶縁層の全体面の上に金属層を形成する金属層形成段階と、
前記複数の第1電極と前記複数の第2電極と接続された部分を除いた残りの部分の金属層を除去して、前記第1補助電極と前記第2補助電極を形成する補助電極形成段階と、を含む、請求項17に記載の太陽電池モジュールの製造方法。 - 前記金属層形成段階は、スパッタリング法によって行われ、前記金属層が、一部が前記複数の第1電極と前記複数の第2電極に接続されて一体に形成される、請求項27に記載の太陽電池モジュールの製造方法。
- 前記補助電極の形成段階は、
前記半導体基板の背面と前記金属層との間に形成された前記絶縁層を除去して前記残りの部分の金属層を一緒に除去する、請求項27に記載の太陽電池モジュールの製造方法。
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