JP2008235817A - Solar cell module - Google Patents

Solar cell module Download PDF

Info

Publication number
JP2008235817A
JP2008235817A JP2007077237A JP2007077237A JP2008235817A JP 2008235817 A JP2008235817 A JP 2008235817A JP 2007077237 A JP2007077237 A JP 2007077237A JP 2007077237 A JP2007077237 A JP 2007077237A JP 2008235817 A JP2008235817 A JP 2008235817A
Authority
JP
Japan
Prior art keywords
solar cell
bus bar
solar
electrodes
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2007077237A
Other languages
Japanese (ja)
Other versions
JP4989268B2 (en
Inventor
Takaaki Nakajima
崇暁 中島
Oshi Hikosaka
多 彦坂
Atsushi Nakauchi
淳 仲内
Haruo Yonezu
晴夫 米津
Masakatsu Muraki
政勝 村木
Shinichi Miyahara
真一 宮原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP2007077237A priority Critical patent/JP4989268B2/en
Publication of JP2008235817A publication Critical patent/JP2008235817A/en
Application granted granted Critical
Publication of JP4989268B2 publication Critical patent/JP4989268B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Landscapes

  • Photovoltaic Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar cell module for improving productivity by suppressing warpage of a cell substrate. <P>SOLUTION: The solar cell module has a first solar cell C<SB>11</SB>having a photoelectric conversion section 21 for generating photo-production carriers due to the incidence of light and not less than two busbar electrodes H<SB>11</SB>, H<SB>12</SB>extended in an X direction on the main surface of the photoelectric conversion section 21; and a first connection member S1 for electrically connecting the first solar cell C<SB>11</SB>and the second solar cell C<SB>21</SB>adjacent to a Y direction substantially orthogonally crossing the X direction. The first connection member S1 is adhered to only one busbar electrode H<SB>11</SB>of not less than two busbar electrodes H<SB>11</SB>, H<SB>12</SB>that the first solar cell C<SB>11</SB>is provided with. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、赤外線、可視光、短波長の電磁波に感応する半導体装置に関し、特に、これらの輻射線エネルギーを電気的エネルギーに変換する太陽電池モジュールに関する。   The present invention relates to a semiconductor device that is sensitive to infrared rays, visible light, and short-wave electromagnetic waves, and more particularly to a solar cell module that converts these radiation energy into electrical energy.

太陽電池は、クリーンで無尽蔵なエネルギー源である太陽からの光を直接電気に変換できることから、環境に優しい新しいエネルギー源として注目されている。   Solar cells are attracting attention as a new environmentally friendly energy source because they can directly convert light from the sun, a clean and inexhaustible energy source, into electricity.

このような太陽電池を電力源（エネルギー源）として用いる場合、太陽電池セル１個あたりの出力は高々数Ｗ程度であることから、太陽電池セルごとに用いるのではなく、次に示すようにして、複数の太陽電池セルを行列状に配列し、これらを電気的に直列に接続することで出力を１００Ｗ以上に高めた太陽電池モジュールとして用いられるのが一般的である（例えば、特許文献１参照）。   When such a solar battery is used as a power source (energy source), the output per solar battery cell is about several watts at most, so it is not used for each solar battery cell, but as shown below. In general, it is used as a solar cell module in which a plurality of solar cells are arranged in a matrix and these are electrically connected in series to increase the output to 100 W or more (for example, see Patent Document 1). ).

先ず、所定数の太陽電池セルを一直線に沿って並べ、これらを前記一直線の方向に伸びるタブ配線で電気的に直列に接続してなるストリングを複数形成する。そして、複数のストリングを前記一直線に略垂直な短手方向に並べ、隣接するストリングの端部に位置する太陽電池セル上のタブ配線間を前記短手方向に伸びる接続部材で電気的に接続する。以上により、行列状に配列した複数の太陽電池セルを直列に接続することができる。   First, a predetermined number of solar cells are arranged along a straight line, and a plurality of strings are formed by connecting them in series with tab wiring extending in the direction of the straight line. Then, a plurality of strings are arranged in the short direction substantially perpendicular to the straight line, and the tab wirings on the solar cells located at the ends of the adjacent strings are electrically connected by a connecting member extending in the short direction. . As described above, a plurality of solar cells arranged in a matrix can be connected in series.

また、本出願人により、隣接するストリングの端部に位置する太陽電池セルの異なる極性の電極を同じ方向に向かせて配置し、接続部材が太陽電池セルの主面上において、隣接するストリングの端部に位置する太陽電池セルの裏面側のバスバー電極に接着されている太陽電池モジュールが提案されている（特願２００６−９９９７８）。
特開２００６−２７８９０４号公報 Further, the applicant arranges the electrodes of different polarities of the solar cells located at the ends of the adjacent strings so as to face in the same direction, and the connecting member is arranged on the main surface of the solar cells. There has been proposed a solar cell module that is bonded to a bus bar electrode on the back side of a solar cell located at an end (Japanese Patent Application No. 2006-99978).
JP 2006-278904 A

しかし、通常、太陽電池セルには２以上のバスバー電極が形成されているので、接続部材は、１の太陽電池セルについて２以上のバスバー電極に接着されることになる。よって、接続部材とセル基板との熱膨張係数の違いにより接続部材の接着時にセル基板の反りが発生して、ラミネート時にセル基板が割れてしまう場合があり、太陽電池モジュールの生産性が低下してしまう。   However, since usually two or more bus bar electrodes are formed in the solar battery cell, the connecting member is bonded to two or more bus bar electrodes for one solar battery cell. Therefore, due to the difference in thermal expansion coefficient between the connection member and the cell substrate, the warpage of the cell substrate may occur when the connection member is bonded, and the cell substrate may be cracked during lamination, which decreases the productivity of the solar cell module. End up.

本発明の目的は、セル基板の反りを抑制して生産性を向上させた太陽電池モジュールを提供することである。   The objective of this invention is providing the solar cell module which suppressed the curvature of the cell substrate and improved productivity.

本発明の第１の特徴は、光入射により光生成キャリアを発生させる光電変換部及び光電変換部の主面上に配置された第１の方向に伸びる２以上のバスバー電極を備える第１の太陽電池セルと、第１の太陽電池セルと第１の方向に対して略直交する第２の方向に隣接する第２の太陽電池セルとの間を電気的に接続する第１の接続部材とを備える太陽電池モジュールであって、第１の接続部材は、第１の太陽電池セルが備える２以上のバスバー電極の中の１のバスバー電極のみに接着されていることである。   A first feature of the present invention is a first solar comprising a photoelectric conversion unit that generates photogenerated carriers upon incidence of light, and two or more bus bar electrodes that are disposed on a main surface of the photoelectric conversion unit and extend in a first direction. A battery cell, and a first connecting member that electrically connects the first solar battery cell and a second solar battery cell adjacent in a second direction substantially orthogonal to the first direction. It is a solar cell module provided, Comprising: A 1st connection member is adhere | attached only on one bus-bar electrode in the 2 or more bus-bar electrodes with which a 1st photovoltaic cell is provided.

本発明の第１の特徴において、太陽電池モジュールは、第１の太陽電池セルと第２の太陽電池セルとを電気的に接続する第２の接続部材を更に備え、第２の接続部材は、第１の太陽電池セルが備える２以上のバスバー電極の中の他の１のバスバー電極のみに接着されていることが望ましい。   In the first aspect of the present invention, the solar cell module further includes a second connection member that electrically connects the first solar cell and the second solar cell, and the second connection member includes: It is desirable that only the other one bus bar electrode among the two or more bus bar electrodes provided in the first solar battery cell is adhered.

本発明の第１の特徴において、第１の接続部材と第２の接続部材は、互いに電気的に接続されていることが望ましい。   In the first feature of the present invention, it is desirable that the first connecting member and the second connecting member are electrically connected to each other.

本発明の第２の特徴は、光入射により光生成キャリアを発生させる光電変換部及び光電変換部の主面上に配置された第１の方向に伸びる第１及び第ｍ（ｍは２以上の自然数）のバスバー電極をそれぞれ備え、第１の方向に対して略直交する第２の方向に隣接する第１乃至第ｎ（ｎは２以上の自然数）の太陽電池セルと、第１乃至第ｎの太陽電池セルの間を電気的に接続する第１乃至第ｐの接続部材とを備える太陽電池モジュールであって、ｐはｍとｎを乗算した数字であり、第１乃至第ｐの接続部材は、互いに異なる１のバスバー電極のみにそれぞれ接着され、互いに電気的に接続されていることである。   The second feature of the present invention is that a photoelectric conversion unit that generates a photogenerated carrier upon incidence of light and a first and mth (m is 2 or more) extending in a first direction disposed on a main surface of the photoelectric conversion unit. Natural number) bus bar electrodes, respectively, and first to nth (n is a natural number of 2 or more) solar cells adjacent to a second direction substantially orthogonal to the first direction, and the first to nth 1 to p-th connection members that electrically connect the solar cells, wherein p is a number obtained by multiplying m by n, and the first to p-th connection members Is bonded to only one bus bar electrode different from each other and electrically connected to each other.

第１の接続部材は第１の太陽電池セルが有する２以上のバスバー電極のうちの１のバスバー電極のみに接着されているので、第１の接続部材とセル基板との間に熱膨張係数の違いがあっても、第１の接続部材をセル基板に接続する時にセル基板の反りが抑制され、太陽電池モジュールの生産性が向上する。   Since the first connecting member is bonded to only one bus bar electrode of the two or more bus bar electrodes of the first solar battery cell, the coefficient of thermal expansion is between the first connecting member and the cell substrate. Even if there is a difference, the warpage of the cell substrate is suppressed when the first connection member is connected to the cell substrate, and the productivity of the solar cell module is improved.

第２の接続部材は第１の太陽電池セルが有する２以上のバスバー電極のうちの他の１のバスバー電極のみに接着されているので、第２の接続部材とセル基板との間に熱膨張係数の違いがあっても、第２の接続部材をセル基板に接続する時にセル基板の反りが抑制され、太陽電池モジュールの生産性が向上する。更に、第２の接続部材が、第１の接続部材が接着されていない他のバスバー電極に接着されているので、電気抵抗が低減し、第１の太陽電池セルと第２の太陽電池セルの間の電気的接続を確固たるものとすることができる。   Since the second connecting member is bonded only to the other one of the two or more bus bar electrodes of the first solar battery cell, thermal expansion occurs between the second connecting member and the cell substrate. Even if there is a difference in coefficient, the warpage of the cell substrate is suppressed when the second connection member is connected to the cell substrate, and the productivity of the solar cell module is improved. Furthermore, since the second connecting member is bonded to another bus bar electrode to which the first connecting member is not bonded, the electric resistance is reduced, and the first solar cell and the second solar cell are connected. The electrical connection between them can be solid.

第１の接続部材と第２の接続部材が、互いに電気的に接続されていることにより、電気抵抗が更に低減し、第１の太陽電池セルと第２の太陽電池セルの間の電気的接続をより確固たるものとすることができる。   Since the first connection member and the second connection member are electrically connected to each other, the electrical resistance is further reduced, and the electrical connection between the first solar cell and the second solar cell. Can be made more robust.

第１乃至第ｐの接続部材は、１のバスバー電極のみにそれぞれ接着されているので、第１乃至第ｐの接続部材とセル基板との間に熱膨張係数の違いがあっても、第１乃至第ｐの接続部材をセル基板に接続する時にセル基板の反りが抑制され、太陽電池モジュールの生産性が向上する。更に、第１乃至第ｐの接続部材が、互いに異なるバスバー電極に接着され、互いに電気的に接続されているので、電気抵抗が低減し、第１乃至第ｎの太陽電池セルの間の電気的接続を確固たるものとすることができる。   Since the first to p-th connection members are respectively bonded to only one bus bar electrode, the first to p-th connection members are not affected even if there is a difference in thermal expansion coefficient between the first to p-th connection members and the cell substrate. The warp of the cell substrate is suppressed when connecting the p-th connecting member to the cell substrate, and the productivity of the solar cell module is improved. Furthermore, since the first to p-th connecting members are bonded to different bus bar electrodes and are electrically connected to each other, the electrical resistance is reduced, and the electrical connection between the first to n-th solar cells is reduced. The connection can be solid.

以下図面を参照して、本発明の実施の形態を説明する。図面の記載において同一部分には同一符号を付している。
（第１の実施の形態）
図１を参照して、本発明の第１の実施の形態に係わる太陽電池モジュールの構成を説明する。太陽電池モジュールは、第１の方向（Ｘ方向）に沿って並べられた所定数の太陽電池セルを電気的に直列に接続してなる複数の太陽電池群Ｇ１〜Ｇｎと、複数の太陽電池群Ｇ１〜Ｇｎを電気的に直列に接続する第１の接続部材Ｓ１とを備える。図１では太陽電池モジュールがｎ個の太陽電池群を備える場合について説明する。ｎ個の太陽電池群を第１乃至第ｎの太陽電池群Ｇ１〜Ｇｎと呼ぶ。これらの太陽電池群Ｇ１〜Ｇｎの受光面側及び裏面側には、封止用の樹脂を介してそれぞれ透光性表面部材と裏面カバー材とが接着されている（図示せず）。 Embodiments of the present invention will be described below with reference to the drawings. In the description of the drawings, the same parts are denoted by the same reference numerals.
(First embodiment)
With reference to FIG. 1, the structure of the solar cell module concerning the 1st Embodiment of this invention is demonstrated. The solar cell module includes a plurality of solar cell groups G 1 to G n formed by electrically connecting a predetermined number of solar cells arranged in the first direction (X direction) in series, and a plurality of solar cells. and a first connecting member S1 for electrically connecting in series the battery group G 1 ~G n. FIG. 1 illustrates a case where the solar cell module includes n solar cell groups. The n solar cell groups are referred to as first to nth solar cell groups G 1 to G n . A translucent surface member and a back surface cover material are bonded to the light receiving surface side and the back surface side of these solar cell groups G 1 to G n via a sealing resin (not shown).

第１乃至第ｎの太陽電池群Ｇ１〜Ｇｎは、それぞれ、所定数の太陽電池セルと、Ｘ方向に沿って並べられた所定数の太陽電池セルを電気的に直列に接続するタブ配線１１とを備える。図１では第１乃至第ｎの太陽電池群Ｇ１〜Ｇｎがそれぞれｋ個の太陽電池セルＣ１〜Ｃｋを備える場合について説明する。第１の太陽電池群Ｇ１は太陽電池セルＣ１１〜Ｃ１ｋを備え、第２の太陽電池群Ｇ２は太陽電池セルＣ２１〜Ｃ２ｋを備える。同様にして、第３〜第ｎの太陽電池群Ｇ３〜Ｇｎは太陽電池セルＣ３１〜Ｃ３ｋ、・・・、Ｃｎ１〜Ｃｎｋを備える。 Solar cell groups G 1 ~G n of first through n are each electrically the wiring member for connecting in series a predetermined number of solar cells, a predetermined number of solar cells arranged along the X direction 11. Solar cell groups G 1 ~G n of first through n in FIG. 1 will be described the case where each comprising k number of the solar cell C 1 -C k. The first solar cell group G 1 includes a solar cell C 11 -C 1k, the second solar cell group G 2 comprises a solar cell C 21 -C 2k. Similarly, the third to n-th solar cell groups G 3 to G n include solar cells C 31 to C 3k ,..., C n1 to C nk .

第１の太陽電池群Ｇ１が備えるｋ個の太陽電池セルＣ１１〜Ｃ１ｋは、第１の方向（Ｘ方向）に沿って順番に並べられている。太陽電池セルＣ１１〜Ｃ１ｋは、それぞれ、第１の主面と当該第１の主面に対向する第２の主面にそれぞれ異なる極性の電極が設けられている。そして、ｋ個の太陽電池セルＣ１１〜Ｃ１ｋは、隣接する太陽電池セルの異なる極性の電極が同じ方向を向くように交互に入れ替えて配列されている。太陽電池セルＣ１１〜Ｃ１ｋは、第１及び第２の主面の両面からの光入射により光生成キャリアを発生する光電変換部と、光電変換部で発生した光生成キャリアを取り出すための正負１対の電極とを備えている。正負１対の電極は、第１の主面及び第２の主面にそれぞれ設けられている。ここでは、正極が第１の主面側に形成され、負極が第２の主面側に形成されている場合について説明する。太陽電池セルＣ１１の正極（第１の主面）、太陽電池セルＣ１２の負極（第２の主面）、太陽電池セルＣ１３の正極（第１の主面）、・・・太陽電池セルＣ１ｋの正極（第１の主面）が同じ方向を向くように配列されている。 The k solar cells C 11 to C 1k included in the first solar cell group G 1 are arranged in order along the first direction (X direction). In each of the solar cells C 11 to C 1k , electrodes having different polarities are provided on the first main surface and the second main surface facing the first main surface, respectively. The k solar cells C 11 to C 1k are alternately arranged so that electrodes having different polarities in adjacent solar cells face the same direction. The solar cells C 11 to C 1k each have a photoelectric conversion unit that generates a photogenerated carrier by light incidence from both surfaces of the first and second main surfaces, and a positive / negative sign for taking out the photogenerated carrier generated by the photoelectric conversion unit. A pair of electrodes. A pair of positive and negative electrodes is provided on each of the first main surface and the second main surface. Here, a case where the positive electrode is formed on the first main surface side and the negative electrode is formed on the second main surface side will be described. The positive electrode of the solar cell C 11 (first main surface), a negative electrode (second main surface) of the solar cell C 12, the positive electrode (first main surface) of the solar cell C 13, · · · solar cell The positive electrodes (first main surfaces) of the cells C 1k are arranged to face the same direction.

ｋ個の太陽電池セルＣ１１〜Ｃ１ｋを電気的に直列に接続するタブ配線１１は、隣接する２つの太陽電池セルの同じ側の面に表出した電極どうしを接続することにより、隣接する２つの太陽電池セルを電気的に直列に接続する。タブ配線１１の数はｋ−１個である。ｋ−１個のタブ配線１１は、それぞれ、太陽電池セルＣ１１の表面側に表出した正極と太陽電池セルＣ１２の表面側に表出した負極の間を接続し、太陽電池セルＣ１２の裏面側に表出した正極と太陽電池セルＣ１３の裏面側に表出した負極の間を接続し、・・・、太陽電池セルＣ１ｋ−１の裏面側に表出した正極と太陽電池セルＣ１ｋの裏面側に表出した負極の間を接続する。 The tab wiring 11 that electrically connects the k solar cells C 11 to C 1k in series is adjacent to each other by connecting the electrodes exposed on the same side surface of two adjacent solar cells. Two solar cells are electrically connected in series. The number of tab wirings 11 is k-1. k-1 pieces of the wiring member 11 are respectively connected between the negative electrode exposed to the surface side of the positive electrode and the solar cell C 12 which is exposed on the surface side of the solar cell C 11, the solar cell C 12 anode connected between, ..., the solar cell C 1k-1 expressive the positive electrode and the solar cell on the back side which is exposed to the outside on the back side of the exposed the positive electrode and the solar cell C 13 on the back side of the The negative electrode exposed on the back side of the cell C 1k is connected.

その他の第２〜第ｎの太陽電池群Ｇ２〜Ｇｎがそれぞれ備えるｋ個の太陽電池セルＣ１〜Ｃｋ、及びｋ−１個のタブ配線１１についても、次に示す相違点を除き、第１の太陽電池群Ｇ１が備えるｋ個の太陽電池セルＣ１１〜Ｃ１ｋ及びｋ−１個のタブ配線１１と同様な構成を有する。相違点は、第２、第４、第６、・・・、第ｎの太陽電池群Ｇ２、Ｇ４、Ｇ６、・・・、Ｇｎにおいて、太陽電池セルＣ１の負極（第２の主面）、太陽電池セルＣ２の正極（第１の主面）、太陽電池セルＣ３の負極（第２の主面）、・・・太陽電池セルＣｋの負極（第２の主面）が同じ方向を向くように配列されている。即ち、偶数番目の太陽電池群Ｇ２、Ｇ４、Ｇ６、・・・、Ｇｎにおける負極及び正極の入れ替えの順番を、奇数番目の太陽電池群Ｇ１、Ｇ３、Ｇ５、・・・、Ｇｎ−１に対して逆にする。 Other than the following differences, k solar cells C 1 to C k and k−1 tab wirings 11 included in the other second to nth solar cell groups G 2 to G n are also provided. has the same structure as the k of the solar cells C 11 -C 1k and k-1 pieces of the wiring member 11 to the first solar cell group G 1 is provided. The difference is that the second, fourth, sixth, ..., the solar cell group G 2 of the second n, G 4, G 6, ..., in G n, the negative electrode of the solar cell C 1 (second main surface) of the solar cell C 2 positive electrode (first main surface), a negative electrode (second main surface of the solar cell C 3), the negative electrode of the ... solar cell C k (second main Are arranged in the same direction. That is, the order of replacement of the negative electrode and the positive electrode in the even-numbered solar cell groups G 2 , G 4 , G 6 ,..., Gn is changed to the odd-numbered solar cell groups G 1 , G 3 , G 5 ,. • Reverse for G n−1 .

第１乃至第ｎの太陽電池群Ｇ１〜Ｇｎは、第１の方向（Ｘ方向）に対して実質的に垂直な太陽電池群の短手方向（第２の方向：Ｙ方向）に順番に並べられている。よって、第１の太陽電池群Ｇ１の一端に位置する太陽電池セルＣ１１（第１の太陽電池セル）と第２の太陽電池群Ｇ２の一端に位置する太陽電池セルＣ２１（第２の太陽電池セル）は、互いに異なる極性の電極が同一方向を向くように配置される。即ち、太陽電池モジュールの表面側に太陽電池セルＣ１１の正極（第１の主面）及び太陽電池セルＣ２１の負極（第２の主面）が配置される。同様に、第２の太陽電池群Ｇ２の一端に位置する太陽電池セルＣ２ｋ（第１の太陽電池セル）と第３の太陽電池群Ｇ３の一端に位置する太陽電池セルＣ３ｋ（第２の太陽電池セル）は、互いに異なる極性の電極が同一方向を向くように配置され、・・・、第ｎ−１の太陽電池群Ｇｎ−１の一端に位置する太陽電池セルＣｎ−１１（第１の太陽電池セル）と第ｎの太陽電池群Ｇｎの一端に位置する太陽電池セルＣｎ１（第２の太陽電池セル）は、互いに異なる極性の電極が同一方向を向くように配置される。 The first to n-th solar cell groups G 1 to G n are in order in the short direction (second direction: Y direction) of the solar cell group substantially perpendicular to the first direction (X direction). Are listed. Therefore, the solar cell C 11 (the first solar cell) and the solar cell C 21 located in the second end of the solar cell group G 2 (second located at a first end of the solar cell group G 1 The solar cells) are arranged so that electrodes having different polarities face in the same direction. That is, the positive electrode of the solar cell C 11 in the surface side of the solar cell module (first principal surface) and a negative electrode of the solar cell C 21 (second main surface) is placed. Similarly, solar cell C 2k (first solar cell) located at one end of second solar cell group G 2 and solar cell C 3k (first solar cell) located at one end of third solar cell group G 3 2 solar cells) are arranged such that electrodes of different polarities face in the same direction, ..., solar cells C n- positioned at one end of the ( n-1) th solar cell group Gn-1. 11 (first solar battery cell) and solar battery cell C n1 (second solar battery cell) located at one end of n-th solar battery group G n so that electrodes having different polarities face the same direction. Be placed.

第１の接続部材Ｓ１は、Ｙ方向に隣接する２の太陽電池群Ｇ１〜Ｇｎの間を電気的に直列に接続する。第１の接続部材Ｓ１の数はｎ−１個である。ｎ−１個の第１の接続部材Ｓ１は、それぞれ、Ｙ方向に隣接する２の太陽電池群Ｇ１〜Ｇｎの一端に位置する太陽電池セルどうしを電気的に直列に接続する。Ｙ方向に隣接する２つの太陽電池群Ｇ１〜Ｇｎの一端に位置する太陽電池セルは、互いに異なる極性の電極が同一方向を向くように配置されるので、第１の接続部材Ｓ１は、太陽電池モジュールの裏面側或いは表面側に表出した電極どうしを接続することになる。図１の例では、太陽電池モジュールの裏面側即ち、反受光面側に表出した電極どうしを接続した場合について示している。ｎ−１個の第１の接続部材Ｓ１は、それぞれ、太陽電池セルＣ１１と太陽電池セルＣ２１の間、太陽電池セルＣ２ｋと太陽電池セルＣ３ｋの間、太陽電池セルＣ３１と太陽電池セルＣ４１の間、・・・、太陽電池セルＣｎ−１１と太陽電池セルＣｎ１の間を直列に接続している。このようにして、第１の接続部材Ｓ１は、第１乃至第ｎの太陽電池群Ｇ１〜Ｇｎを電気的に直列に接続する。 The first connecting member S1 electrically connects two solar cell groups G 1 to G n adjacent in the Y direction in series. The number of first connecting members S1 is n-1. the n-1 first connecting member S1 is respectively electrically connected in series solar cells each other, located at one end of the second solar cell group G 1 ~G n adjacent in the Y direction. Since the solar cells located at one end of the two solar cell groups G 1 to G n adjacent in the Y direction are arranged so that the electrodes of different polarities face the same direction, the first connection member S1 is The electrodes exposed on the back side or the front side of the solar cell module are connected. In the example of FIG. 1, it has shown about the case where the electrode exposed on the back surface side, ie, the anti-light-receiving surface side, of a solar cell module is connected. The first connecting member S1 n-1 pieces of each, during the solar cell C 11 and the solar cell C 21, between the solar cells C 2k and the solar cell C 3k, solar cells C 31 and the sun between the battery cell C 41, · · ·, it is connected between the solar cells C n-11 and the solar cell C n1 in series. In this way, the first connecting member S1 electrically connects the first to nth solar cell groups G1 to Gn in series.

太陽電池モジュールは、ｋ×ｎの行列状に太陽電池セルが配置されたセル構造を有する。このｋ×ｎ個の太陽電池セルが配置されている領域を「セル領域」という。第１の接続部材Ｓ１は、このセル領域内において、Ｙ方向に隣接する太陽電池セル間を接続している。   The solar cell module has a cell structure in which solar cells are arranged in a k × n matrix. A region where the k × n solar cells are arranged is referred to as a “cell region”. 1st connection member S1 has connected between the photovoltaic cells adjacent to a Y direction within this cell area | region.

第１の接続部材Ｓ１により電気的に直列に接続された一連の第１乃至第ｎの太陽電池群Ｇ１〜Ｇｎの両端に位置する太陽電池セルＣ１ｋと太陽電池セルＣｎｋには、太陽電池モジュールが発電した電力を外部へ取り出すための出力端子Ｔ１及び出力端子Ｔ２がそれぞれ接続されている。 The solar cells C 1k and C nk located at both ends of a series of first to n-th solar cell groups G 1 to G n electrically connected in series by the first connection member S1 include An output terminal T1 and an output terminal T2 for taking out the electric power generated by the solar cell module are connected to each other.

図２（ａ）は、第１及び第２の太陽電池群Ｇ１、Ｇ２の一端に位置する太陽電池セルＣ１１、Ｃ２１の裏面側の構成を拡大して示す平面図である。図２（ａ）を参照して、隣接する太陽電池群を電気的に直列に接続する第１の接続部材Ｓ１及び太陽電池セルの構成について説明する。太陽電池セルは、第１及び第２の主面の両面から入射する光により光生成キャリアを生成する光電変換部２１と、光電変換部２１の第１及び第２の主面上にそれぞれ形成された複数の幅狭のフィンガー電極１３及び幅広のバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２からなる集電極とを備える。集電極は、光電変換部２１により生成された光生成キャリアを収集する電極であり、Ｙ方向に伸びるフィンガー電極１３とＸ方向に伸びるバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２とが組み合わされて例えば櫛型状の形状に形成されている。フィンガー電極１３は光電変換部２１で生成された光生成キャリアの収集用の電極であり、光電変換部２１の光入射面のほぼ全域にわたって配されている。また、バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２は、複数のフィンガー電極１３で収集された光生成キャリアの集電用の電極であり、総てのフィンガー電極１３と交差するように、Ｘ方向に沿って所定の間隔をおいてライン状に形成される。フィンガー電極１３、バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２は、例えば銀ペースト等を焼成してなる導電性の金属材料からなる。また、１の太陽電池セルあたりのバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２の数は、太陽電池セルの大きさや抵抗を考慮して適宜適当な数に設定される。本発明の実施形態では、１の太陽電池セルが２のバスバー電極を備える場合について説明するが、１の太陽電池セルが備えるバスバー電極の数は、３以上であっても構わない。また、バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２上に金属箔が接着されていても良い。 2 (a) is an enlarged plan view showing the back surface side of the structure of the first and second solar cells C 11 located at one end of the solar cell group G 1, G 2, C 21. With reference to Fig.2 (a), the structure of 1st connection member S1 and a photovoltaic cell which connect the adjacent solar cell group electrically in series is demonstrated. The solar cells are formed on the photoelectric conversion unit 21 that generates photogenerated carriers by light incident from both surfaces of the first and second main surfaces, and on the first and second main surfaces of the photoelectric conversion unit 21, respectively. And a plurality of narrow finger electrodes 13 and collector electrodes made of wide bus bar electrodes H 11 , H 12 , H 21 , H 22 . The collector electrode is an electrode that collects photogenerated carriers generated by the photoelectric conversion unit 21 , and is a combination of finger electrodes 13 extending in the Y direction and bus bar electrodes H 11 , H 12 , H 21 , and H 22 extending in the X direction. For example, it is formed in a comb shape. The finger electrode 13 is an electrode for collecting photogenerated carriers generated by the photoelectric conversion unit 21, and is arranged over almost the entire light incident surface of the photoelectric conversion unit 21. The bus bar electrodes H 11 , H 12 , H 21 , and H 22 are electrodes for collecting photogenerated carriers collected by the plurality of finger electrodes 13, and cross all the finger electrodes 13. It is formed in a line at a predetermined interval along the X direction. The finger electrode 13 and the bus bar electrodes H 11 , H 12 , H 21 , and H 22 are made of a conductive metal material formed by firing, for example, silver paste or the like. Further, the number of bus bar electrodes H 11 , H 12 , H 21 , and H 22 per one solar battery cell is appropriately set in consideration of the size and resistance of the solar battery cell. In the embodiment of the present invention, a case where one solar battery cell includes two bus bar electrodes will be described, but the number of bus bar electrodes included in one solar battery cell may be three or more. Further, a metal foil may be bonded onto the bus bar electrodes H 11 , H 12 , H 21 , H 22 .

第１及び第２の太陽電池セルＣ１１、Ｃ２１の裏面側には、第１の太陽電池群Ｇ１の一端に位置する第１の太陽電池セルＣ１１と第２の太陽電池群Ｇ２の一端に位置する第２の太陽電池セルＣ２１とを電気的に直列に接続する第１の接続部材Ｓ１が配置されている。第１の接続部材Ｓ１は、銅箔の表面を錫メッキした配線であって、第２の方向（Ｙ方向）に沿って伸ばされ、Ｘ方向に伸びる４のバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２と交差している。 On the back side of the first and second solar cells C 11, C 21, the first solar cell C 11 and the second solar cell group located in a first end of the solar cell group G 1 G 2 the first connecting member S1 for connecting the second solar cell C 21 in electrical series located at one end is disposed. The first connecting member S1 is a wiring in which the surface of the copper foil is tin-plated, and is extended along the second direction (Y direction) and extends in the X direction. Four bus bar electrodes H 11 , H 12 , H 21, intersects the H 22.

図２（ｂ）は、図２（ａ）のＡ−Ａ切断面に沿った断面図である。バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２は、それぞれ、第１及び第２の太陽電池セルＣ１１、Ｃ２１の光電変換部２１上に配置され、第１の接続部材Ｓ１は、バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２上に配置されている。第１の接続部材Ｓ１は、交差箇所Ｆ１１、Ｆ１２において、バスバー電極Ｈ１１及びバスバー電極Ｈ２１に接着され、電気的に接続されているが、バスバー電極Ｈ１２及びバスバー電極Ｈ２２には接着されていない。 FIG.2 (b) is sectional drawing along the AA cut surface of Fig.2 (a). The bus bar electrodes H 11 , H 12 , H 21 , H 22 are arranged on the photoelectric conversion units 21 of the first and second solar cells C 11 , C 21 , respectively, and the first connection member S 1 is a bus bar. Arranged on the electrodes H 11 , H 12 , H 21 , H 22 . The first connecting member S1 is at the intersection F 11, F 12, is bonded to the bus bar electrode H 11 and the bus bar electrodes H 21, it has been electrically connected to the bus bar electrode H 12 and the bus bar electrode H 22 is It is not glued.

このように、第１の接続部材Ｓ１は、第１の太陽電池セルＣ１１が備える２のバスバー電極Ｈ１１、Ｈ１２（集電極）の中の１のバスバー電極Ｈ１１（集電極）のみに接着され、第２の太陽電池セルＣ１２が備える２のバスバー電極Ｈ２１、Ｈ２２（集電極）の中の１のバスバー電極Ｈ２１（集電極）のみに接着されている。これにより、第１の接続部材Ｓ１と第１及び第２の太陽電池セルＣ１１、Ｃ２１（セル基板）との間に熱膨張係数の違いがあっても、第１の接続部材Ｓ１を第１及び第２の太陽電池セルＣ１１、Ｃ２１に接続する時に第１及び第２の太陽電池セルＣ１１、Ｃ２１の反りが抑制される。よって、ラミネート工程時のセル割れが抑制され、太陽電池モジュールの生産性が向上する。 Thus, the first connecting member S1 is provided only on one bus bar electrode H 11 (collector electrode) of the two bus bar electrodes H 11 and H 12 (collector electrode) included in the first solar cell C 11. It is bonded and bonded only to one bus bar electrode H 21 (collector electrode) among the two bus bar electrodes H 21 and H 22 (collector electrode) included in the second solar cell C 12 . Thereby, even if there is a difference in thermal expansion coefficient between the first connecting member S1 and the first and second solar cells C 11 , C 21 (cell substrate), the first connecting member S1 warpage of the first and second solar cells C 11, C 21 is suppressed to connect to the first and second solar cells C 11, C 21. Therefore, cell cracking during the laminating process is suppressed, and the productivity of the solar cell module is improved.

なお、第１の接続部材Ｓ１は、バスバー電極Ｈ１２及びバスバー電極Ｈ２２に電気的に接続されていることが望ましい。これにより、第１及び第２の太陽電池セルＣ１１、Ｃ２１の間の電気的接続を確固たるものとすることができる。 The first connecting member S1 is desirably is electrically connected to the bus bar electrode H 12 and the bus bar electrode H 22. Thus, the electrical connection between the first and second solar cells C 11, C 21 can be solidify.

図３を参照して、光電変換部２１の断面構成を説明する。光電変換部２１は、基板３１と、ｉ型層３２と、ｐ型層３３と、透明導電膜３４と、ｉ型層３６と、ｎ型層３７と、透明導電膜３８とを備える。基板３１は、ｎ型の単結晶シリコン基板である。基板３１の第１の主面側に、真性非晶質シリコンからなるｉ型層３２と、ｐ型非晶質シリコンからなるｐ型層３３が順次積層される。さらに、ｐ型層３３上に透明導電膜３４が積層されている。一方、基板３１の第２の主面側に、真性非晶質シリコンからなるｉ型層３６と、ｎ型非晶質シリコンからなるｎ型層３７が順次積層される。さらに、ｎ型層３７上に透明導電膜３８が積層されている。光電変換部２１は、第１の主面及び第２の主面から入射する光が共に基板３１に入射し、いずれの面から入射しても起電流が生じる。透明導電膜３４、３８は、ＩＴＯ、ＺｎＯ、ＳｎＯ２等の透光性材料からなる。図示は省略するが、透明導電膜３４、３８の上に櫛歯形状のフィンガー電極１３及びバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２がそれぞれ形成される。尚、光電変換部２１の構成はこれに限らず、熱拡散を用いてｐｎ接合を形成してなる結晶系の太陽電池等、従来周知の種々の構成を採用することができる。 With reference to FIG. 3, the cross-sectional structure of the photoelectric conversion part 21 is demonstrated. The photoelectric conversion unit 21 includes a substrate 31, an i-type layer 32, a p-type layer 33, a transparent conductive film 34, an i-type layer 36, an n-type layer 37, and a transparent conductive film 38. The substrate 31 is an n-type single crystal silicon substrate. An i-type layer 32 made of intrinsic amorphous silicon and a p-type layer 33 made of p-type amorphous silicon are sequentially stacked on the first main surface side of the substrate 31. Further, a transparent conductive film 34 is laminated on the p-type layer 33. On the other hand, an i-type layer 36 made of intrinsic amorphous silicon and an n-type layer 37 made of n-type amorphous silicon are sequentially stacked on the second main surface side of the substrate 31. Further, a transparent conductive film 38 is laminated on the n-type layer 37. In the photoelectric conversion unit 21, both light incident from the first main surface and the second main surface is incident on the substrate 31, and an electromotive current is generated regardless of which surface is incident. The transparent conductive films 34 and 38 are made of a translucent material such as ITO, ZnO, or SnO 2 . Although not shown, comb-shaped finger electrodes 13 and bus bar electrodes H 11 , H 12 , H 21 , and H 22 are formed on the transparent conductive films 34 and 38, respectively. The configuration of the photoelectric conversion unit 21 is not limited to this, and various conventionally known configurations such as a crystalline solar cell formed by forming a pn junction using thermal diffusion can be employed.

以上説明したように、本発明の第１の実施の形態によれば、以下の作用効果が得られる。   As described above, according to the first embodiment of the present invention, the following operational effects can be obtained.

第１の接続部材Ｓ１は、第１の太陽電池セルＣ１１が有する２のバスバー電極Ｈ１１、Ｈ１２（集電極）の中の１のバスバー電極Ｈ１１（集電極）のみに接着されているので、第１の接続部材Ｓ１と第１の太陽電池セルＣ１１（セル基板）との間に熱膨張係数の違いがあっても、第１の接続部材Ｓ１を第１の太陽電池セルＣ１１（セル基板）に接続する時に第１の太陽電池セルＣ１１（セル基板）の反りが抑制され、太陽電池モジュールの生産性が向上する。同様に、第１の接続部材Ｓ１は、第２の太陽電池セルＣ２１が有する２のバスバー電極Ｈ２１、Ｈ２２（集電極）の中の１のバスバー電極Ｈ２１（集電極）のみに接着されているので、第１の接続部材Ｓ１と第２の太陽電池セルＣ２１（セル基板）との間に熱膨張係数の違いがあっても、第１の接続部材Ｓ１を第２の太陽電池セルＣ２１（セル基板）に接続する時に第２の太陽電池セルＣ２１（セル基板）の反りが抑制され、太陽電池モジュールの生産性が向上する。
（第２の実施の形態）
第２の実施の形態では、隣接する太陽電池群の間を直列に接続する配線部材として、第１の接続部材Ｓ１の他に、Ｙ方向に隣接する太陽電池セルの間を電気的に接続する第２の接続部材を更に備える場合について説明する。 The first connecting member S1 is bonded to only one bus bar electrode H 11 (collector electrode) of the two bus bar electrodes H 11 and H 12 (collector electrode) of the first solar cell C 11 . Therefore, even if there is a difference in thermal expansion coefficient between the first connection member S1 and the first solar cell C 11 (cell substrate), the first connection member S1 is connected to the first solar cell C 11. When connecting to the (cell substrate), warpage of the first solar cell C 11 (cell substrate) is suppressed, and the productivity of the solar cell module is improved. Similarly, the first connection member S1 is bonded to only one bus bar electrode H 21 (collector electrode) among the two bus bar electrodes H 21 and H 22 (collector electrode) of the second solar cell C 21. because it is, even in the thermal expansion coefficient difference between the first connecting member S1 and the second solar cell C 21 (cell substrate), the first connecting member S1 second solar cell warpage of the second solar cell C 21 (cell substrate) is suppressed when connecting to the cell C 21 (cell substrate), is improved productivity of the solar cell module.
(Second Embodiment)
In the second embodiment, as wiring members for connecting adjacent solar cell groups in series, the solar cells adjacent in the Y direction are electrically connected in addition to the first connecting member S1. A case where the second connecting member is further provided will be described.

第２の接続部材Ｓ２は、Ｙ方向に隣接する２の太陽電池群Ｇ１〜Ｇｎの間を電気的に直列に接続する。具体的に、第２の接続部材Ｓ２は、Ｙ方向に隣接する２の太陽電池群Ｇ１〜Ｇｎの一端に位置する太陽電池セルどうし（第１の太陽電池セルＣ１１と第２の太陽電池セルＣ２１）を電気的に直列に接続する。この他、第２の接続部材Ｓ２は、図１に示す第１の接続部材Ｓ１と同様な構成を有するため、図示及び説明を省略する。 The second connecting member S2 is electrically connected in series between the second solar cell group G 1 ~G n adjacent in the Y direction. Specifically, the second connecting member S2 is a solar cell to each other located at one end of the second solar cell group G 1 ~G n adjacent in the Y direction (a first solar cell C 11 second sun Battery cells C 21 ) are electrically connected in series. In addition, since the second connecting member S2 has the same configuration as the first connecting member S1 shown in FIG. 1, illustration and description thereof are omitted.

図４は、第２の実施の形態における、第１及び第２の太陽電池群Ｇ１、Ｇ２の一端に位置する第１及び第２の太陽電池セルＣ１１、Ｃ２１の裏面側の構成を拡大して示す平面図である。図４を参照して、隣接する太陽電池群を電気的に直列に接続する第２の接続部材Ｓ２について説明する。なお、第１の接続部材Ｓ１及び太陽電池セルの構成については、図２（ａ）及び図２（ｂ）と同じであるため、説明を省略する。 FIG. 4 shows the configuration of the back side of the first and second solar cells C 11 and C 21 located at one end of the first and second solar cell groups G 1 and G 2 in the second embodiment. It is a top view which expands and shows. With reference to FIG. 4, 2nd connection member S2 which electrically connects an adjacent solar cell group in series is demonstrated. In addition, about the structure of 1st connection member S1 and a photovoltaic cell, since it is the same as FIG. 2 (a) and FIG.2 (b), description is abbreviate | omitted.

第１及び第２の太陽電池セルＣ１１、Ｃ２１の裏面側には、第１の接続部材Ｓ１及び第２の接続部材Ｓ２が隣接して配置されている。第２の接続部材Ｓ２は、それぞれ、第１の太陽電池群Ｇ１の一端に位置する第１の太陽電池セルＣ１１と第２の太陽電池群Ｇ２の一端に位置する第２の太陽電池セルＣ２１とを電気的に直列に接続する。第２の接続部材Ｓ２は、銅箔の表面を錫メッキした配線であって、第２の方向（Ｙ方向）に沿って伸ばされ、Ｘ方向に伸びる４のバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２と交差している。第１の接続部材Ｓ１及び第２の接続部材Ｓ２は、Ｘ方向に所定の隙間Ｄをおいて配置するが、この場合、第１の接続部材Ｓ１及び第２の接続部材Ｓ２は、他の手段Ｅを用いて、互いに電気的に接続されていることが望ましい。または、第１の接続部材Ｓ１及び第２の接続部材Ｓ２を隙間無く並べることにより電気的に接続しても構わない。 On the back side of the first and second solar cells C 11 and C 21, a first connection member S 1 and a second connection member S 2 are disposed adjacent to each other. Second connecting members S2 are respectively the second solar cell located in the first solar cell C 11 and the second end of the solar cell group G 2 located on the first end of the solar cell group G 1 Cell C 21 is electrically connected in series. The second connection member S2 is a wiring in which the surface of the copper foil is tin-plated, and is extended along the second direction (Y direction) and extends in the X direction. Four bus bar electrodes H 11 , H 12 , H 21, intersects the H 22. The first connecting member S1 and the second connecting member S2 are arranged with a predetermined gap D in the X direction. In this case, the first connecting member S1 and the second connecting member S2 are other means. It is desirable that they are electrically connected to each other using E. Alternatively, the first connecting member S1 and the second connecting member S2 may be electrically connected by arranging them without gaps.

第２の接続部材Ｓ２は、バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２上に配置されている。第２の接続部材Ｓ２は、交差箇所Ｆ２１、Ｆ２２において、バスバー電極Ｈ１２及びバスバー電極Ｈ２２に接着され、電気的に接続されているが、バスバー電極Ｈ１１及びバスバー電極Ｈ２１には接着されていない。このように、第２の接続部材Ｓ２は、第１の太陽電池セルＣ１１が備える２のバスバー電極Ｈ１１、Ｈ１２（集電極）の中の１のバスバー電極Ｈ１２（集電極）のみに接着され、第２の太陽電池セルＣ１２が備える２のバスバー電極Ｈ２１、Ｈ２２（集電極）の中の１のバスバー電極Ｈ２２（集電極）のみに接着されている。これにより、第２の接続部材Ｓ２と第１及び第２の太陽電池セルＣ１１、Ｃ２１（セル基板）との間に熱膨張係数の違いがあっても、第２の接続部材Ｓ２を第１及び第２の太陽電池セルＣ１１、Ｃ２１に接続する時に第１及び第２の太陽電池セルＣ１１、Ｃ２１の反りが抑制される。よって、太陽電池モジュールの生産性が向上する。 The second connecting member S2 is disposed on the bus bar electrode H 11, H 12, H 21 , H 22. The second connecting member S2 is at the intersection F 21, F 22, is bonded to the bus bar electrode H 12 and the bus bar electrode H 22, it has been electrically connected to the bus bar electrode H 11 and the bus bar electrode H 21 is It is not glued. As described above, the second connecting member S2 is provided only on one bus bar electrode H 12 (collector electrode) of the two bus bar electrodes H 11 and H 12 (collector electrode) included in the first solar cell C 11. It is bonded and bonded only to one bus bar electrode H 22 (collector electrode) among the two bus bar electrodes H 21 and H 22 (collector electrode) included in the second solar cell C 12 . Thus, even in the thermal expansion coefficient difference between the second connecting member S2 first and second solar cells C 11, C 21 (cell substrate), a second connecting member S2 No. warpage of the first and second solar cells C 11, C 21 is suppressed to connect to the first and second solar cells C 11, C 21. Therefore, the productivity of the solar cell module is improved.

また、第２の接続部材Ｓ２は、第１の太陽電池セルＣ１１が備える２のバスバー電極Ｈ１１、Ｈ１２の中で、第１の接続部材Ｓ１が接続されたバスバー電極Ｈ１１とは異なる他のバスバー電極Ｈ１２に接着され、第２の太陽電池セルＣ２１が備える２のバスバー電極Ｈ２１、Ｈ２２の中で、第１の接続部材Ｓ１が接続されたバスバー電極Ｈ２１とは異なる他のバスバー電極Ｈ２２に接着されている。このように、第２の接続部材Ｓ２は、第１の接続部材Ｓ１が接着されていない他のバスバー電極Ｈ１２、Ｈ２２に接着されている。これにより、第１及び第２の太陽電池セルＣ１１、Ｃ２１が備えるバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２のそれぞれに第１の接続部材Ｓ１又は第２の接続部材Ｓ２が接着されるので、電気抵抗が低減し、第１の太陽電池群Ｇ１と第２の太陽電池群Ｇ２の間の電気的接続を確固たるものとすることができる。 The second connecting member S2 is in the first solar cell C 11 2 of the bus bar electrodes H 11 provided in, H 12, differs from the bus bar electrode H 11 to the first connecting member S1 is connected It is bonded to the other bus bar electrodes H 12, in the second solar cell C 21 2 of the bus bar electrodes H 21 provided in, H 22, different from the first connection bus bar electrode H 21 the member S1 is connected It is bonded to the other bus bar electrodes H 22. As described above, the second connection member S2 is bonded to the other bus bar electrodes H 12 and H 22 to which the first connection member S1 is not bonded. Thus, the first connecting member S1 or the second connecting member S2 to the respective first and second bus bar electrodes H 11 of the solar cell C 11, C 21 is provided, H 12, H 21, H 22 adhesive since the electrical resistance is reduced, the first solar cell group G 1 and the electrical connection between the second solar cell group G 2 may be solidify.

更に、第１の接続部材Ｓ１と第２の接続部材Ｓ２は、互いに電気的に接続されていることにより、電気抵抗が更に低減し、第１の太陽電池群Ｇ１と第２の太陽電池群Ｇ２の間の電気的接続をより確固たるものとすることができる。 Furthermore, the first connecting member S1 second connecting member S2 is by being electrically connected to each other, the electrical resistance is further reduced, the first solar cell group G 1 second solar cell group it can be more consolidate the electrical connection between the G 2.

なお、第２の接続部材Ｓ２は、バスバー電極Ｈ１１及びバスバー電極Ｈ２１に電気的に接続されていることが望ましい。これにより、第１及び第２の太陽電池セルＣ１１、Ｃ２１の間の電気的接続を確固たるものとすることができる。
（第３の実施の形態）
第３の実施の形態では、隣接する太陽電池群の間を直列に接続する手段として、第１の接続部材Ｓ１及び第２の接続部材Ｓ２の他に、Ｙ方向に隣接する太陽電池セルの間を電気的に接続する第３の接続部材Ｓ３及び第４の接続部材Ｓ４を更に備える場合について説明する。 The second connecting member S2 is desirably is electrically connected to the bus bar electrode H 11 and the bus bar electrodes H 21. Thus, the electrical connection between the first and second solar cells C 11, C 21 can be solidify.
(Third embodiment)
In 3rd Embodiment, as a means to connect between adjacent solar cell groups in series, between the photovoltaic cells adjacent to a Y direction other than 1st connection member S1 and 2nd connection member S2. A case will be described in which a third connecting member S3 and a fourth connecting member S4 that further electrically connect the two are further provided.

第１〜第４の接続部材Ｓ１〜Ｓ４は、Ｙ方向に隣接する２の太陽電池群Ｇ１〜Ｇｎの間を電気的に直列に接続する。具体的に、第１〜第４の接続部材Ｓ１〜Ｓ４は、Ｙ方向に隣接する２の太陽電池群Ｇ１〜Ｇｎの一端に位置する太陽電池セルどうし（第１の太陽電池セルと第２の太陽電池セル）を電気的に直列に接続する。この他、第２〜第４の接続部材Ｓ２〜Ｓ４は、図１に示す第１の接続部材Ｓ１と同様な構成を有するため、図示及び説明を省略する。 First to fourth connecting members S1~S4 are electrically connected in series between the second solar cell group G 1 ~G n adjacent in the Y direction. Specifically, the first to fourth connecting members S < b > 1 to S < b > 4 are solar cells located at one end of two solar cell groups G 1 to G n adjacent in the Y direction (the first solar cell and the first solar cell). 2 solar cells) are electrically connected in series. In addition, the second to fourth connection members S2 to S4 have the same configuration as the first connection member S1 shown in FIG.

図５は、第３の実施の形態における、第１及び第２の太陽電池群Ｇ１、Ｇ２の一端に位置する太陽電池セルＣ１１、Ｃ２１の裏面側の構成を拡大して示す平面図である。図５を参照して、隣接する太陽電池群を電気的に直列に接続する第１〜第４の接続部材Ｓ１〜Ｓ４について説明する。なお、太陽電池セルの構成については、図２（ａ）及び図２（ｂ）と同じであるため、説明を省略する。 FIG. 5 is an enlarged plan view showing the configuration of the back surface side of the solar cells C 11 and C 21 located at one end of the first and second solar cell groups G 1 and G 2 in the third embodiment. FIG. With reference to FIG. 5, 1st-4th connection member S1-S4 which connects the adjacent solar cell group electrically in series is demonstrated. In addition, about the structure of a photovoltaic cell, since it is the same as FIG. 2 (a) and FIG.2 (b), description is abbreviate | omitted.

第１及び第２の太陽電池セルＣ１１、Ｃ２１の裏面側には、第１〜第４の接続部材Ｓ１〜Ｓ４が配置されている。第１〜第４の接続部材Ｓ１〜Ｓ４は、第１の太陽電池群Ｇ１の一端に位置する第１の太陽電池セルＣ１１と第２の太陽電池群Ｇ２の一端に位置する第２の太陽電池セルＣ２１とを電気的に直列に接続する。第１〜第４の接続部材Ｓ１〜Ｓ４は、それぞれ、銅箔の表面を錫メッキした配線であって、第２の方向（Ｙ方向）に沿って伸ばされ、Ｘ方向に伸びる４のバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２と交差している。第１〜第４の接続部材Ｓ１〜Ｓ４は、Ｘ方向に所定の隙間をおいて配置するが、この場合、第１〜第４の接続部材Ｓ１〜Ｓ４は、他の手段を用いて、互いに電気的に接続されていることが望ましい。または、第１〜第４の接続部材Ｓ１〜Ｓ４を、隙間無く並べることにより電気的に接続しても構わない。 On the back side of the first and second solar cells C 11, C 21, first to fourth connecting members S1~S4 are arranged. First to fourth connecting members S1~S4 are first positioned in the first solar cell C 11 and the second end of the solar cell group G 2 located on the first end of the solar cell group G 1 2 electrically connected in series to the solar cell C 21 in. Each of the first to fourth connection members S1 to S4 is a wiring in which the surface of the copper foil is tin-plated, and is extended along the second direction (Y direction), and four bus bar electrodes extending in the X direction It intersects with H 11 , H 12 , H 21 and H 22 . The first to fourth connecting members S1 to S4 are arranged with a predetermined gap in the X direction. In this case, the first to fourth connecting members S1 to S4 are mutually connected using other means. It is desirable to be electrically connected. Alternatively, the first to fourth connecting members S1 to S4 may be electrically connected by arranging them without gaps.

第１〜第４の接続部材Ｓ１〜Ｓ４は、バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２上に配置されている。第１の接続部材Ｓ１は、交差箇所Ｆ１１において、バスバー電極Ｈ１１に接着され、電気的に接続されているが、バスバー電極Ｈ１２及びバスバー電極Ｈ２１、Ｈ２２には接着されていない。第２の接続部材Ｓ２は、交差箇所Ｆ２１において、バスバー電極Ｈ１２に接着され、電気的に接続されているが、バスバー電極Ｈ１１及びバスバー電極Ｈ２１、Ｈ２２には接着されていない。第３の接続部材Ｓ３は、交差箇所Ｆ３１において、バスバー電極Ｈ２１に接着され、電気的に接続されているが、バスバー電極Ｈ１１、Ｈ１２及びバスバー電極Ｈ２２には接着されていない。第４の接続部材Ｓ４は、交差箇所Ｆ４１において、バスバー電極Ｈ２２に接着され、電気的に接続されているが、バスバー電極Ｈ１１、Ｈ１２及びバスバー電極Ｈ２１には接着されていない。 First to fourth connecting members S1~S4 is disposed on the bus bar electrode H 11, H 12, H 21 , H 22. The first connecting member S1 is at the intersection F 11, is bonded to the bus bar electrode H 11, have been electrically connected to the bus bar electrode H 12 and the bus bar electrodes H 21, H 22 are not bonded. The second connecting member S2 is at the intersection F 21, is bonded to the bus bar electrode H 12, have been electrically connected to the bus bar electrode H 11 and the bus bar electrodes H 21, H 22 are not bonded. The third connecting member S3 is at the intersection F 31, is bonded to the bus bar electrode H 21, have been electrically connected to the bus bar electrode H 11, H 12 and the bus bar electrode H 22 are not bonded. Fourth connecting member S4 is at the intersection F 41, is bonded to the bus bar electrode H 22, have been electrically connected to the bus bar electrode H 11, H 12 and the bus bar electrode H 21 are not bonded.

このように、第１乃至第４の接続部材Ｓ１〜Ｓ４は、バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２の中の１のバスバー電極のみにそれぞれ接着されているので、第１〜第４の接続部材Ｓ１〜Ｓ４と太陽電池セルＣ１１、Ｃ２１（セル基板）との間に熱膨張係数の違いがあっても、第１〜第４の接続部材Ｓ１〜Ｓ４を太陽電池セルＣ１１、Ｃ２１に接続する時に太陽電池セルＣ１１、Ｃ２１の反りが抑制され、太陽電池モジュールの生産性が向上する。更に、第１〜第４の接続部材Ｓ１〜Ｓ４が、互いに異なるバスバー電極に接着され、互いに電気的に接続されているので、電気抵抗が低減し、第１及び第２の太陽電池セルＣ１１、Ｃ２１の間の電気的接続を確固たるものとすることができる。
（第４の実施の形態）
上記した本発明の第１〜第３の実施の形態では、接続部材が太陽電池モジュールを構成する総ての太陽電池群（第１乃至第ｎの太陽電池群Ｇ１〜Ｇｎ）を電気的に直列に接続する場合について説明したが、本発明はこれには限定されない。接続部材が一部の太陽電池群を並列に接続する場合についても本発明を適用することができる。 As described above, the first to fourth connection members S1 to S4 are bonded to only one bus bar electrode among the bus bar electrodes H 11 , H 12 , H 21 , and H 22 , respectively. Even if there is a difference in thermal expansion coefficient between the four connecting members S1 to S4 and the solar cells C 11 and C 21 (cell substrate), the first to fourth connecting members S1 to S4 are connected to the solar cell C. 11 , the warpage of the solar cells C 11 and C 21 is suppressed when connecting to the C 21, and the productivity of the solar cell module is improved. Further, the first to fourth connecting members S1~S4 are bonded to different bus bar electrodes together, since they are electrically connected to each other, the electrical resistance is reduced, the first and second solar cells C 11 , C 21 can be secured.
(Fourth embodiment)
In the first to third embodiments of the present invention described above, all the solar cell groups (the first to nth solar cell groups G 1 to G n ) whose connecting members constitute the solar cell module are electrically connected. However, the present invention is not limited to this. The present invention can also be applied to the case where the connecting member connects some solar cell groups in parallel.

図６を参照して、第４の実施の形態の変形例に係わる太陽電池モジュールの構成を説明する。太陽電池モジュールは、第１の方向（Ｘ方向）に沿って並べられた所定数の太陽電池セルを電気的に直列に接続してなる４つの太陽電池群（第１乃至第４の太陽電池群Ｇ１〜Ｇ４）と、第２の方向（Ｙ方向）に隣接する太陽電池群の間を電気的に並列或いは直列に接続する第１〜第４の接続部材Ｓ１〜Ｓ４とを備える。 With reference to FIG. 6, the structure of the solar cell module concerning the modification of 4th Embodiment is demonstrated. The solar cell module includes four solar cell groups (first to fourth solar cell groups) formed by electrically connecting a predetermined number of solar cells arranged in the first direction (X direction) in series. comprises a G 1 ~G 4), and first to fourth connecting members S1~S4 that electrically connected in parallel or in series between the solar cell group adjacent to the second direction (Y-direction).

第１乃至第４の太陽電池群Ｇ１〜Ｇ４は、Ｙ方向に順番に並べられている。第１の太陽電池群Ｇ１の一端に位置する太陽電池セルＣ１１と第２の太陽電池群Ｇ２の一端に位置する太陽電池セルＣ２１は、互いに同じ極性の電極が同一方向を向くように配置され、第１の太陽電池群Ｇ１の他端に位置する太陽電池セルＣ１ｋと第２の太陽電池群Ｇ２の他端に位置する太陽電池セルＣ２ｋは、互いに同じ極性の電極が同一方向を向くように配置されている。同様にして、第３の太陽電池群Ｇ３の両端に位置する太陽電池セルＣ３１、Ｃ３ｋと第４の太陽電池群Ｇ４の両端に位置する太陽電池セルＣ４１、Ｃ４ｋは、それぞれ互いに同じ極性の電極が同一方向を向くように配置されている。 The first to fourth solar cell groups G 1 to G 4 are arranged in order in the Y direction. The solar cell C 11 located at one end of the first solar cell group G 1 and the solar cell C 21 located at one end of the second solar cell group G 2 are arranged such that electrodes having the same polarity face the same direction. The solar cells C 1k located at the other end of the first solar cell group G 1 and the solar cells C 2k located at the other end of the second solar cell group G 2 are electrodes having the same polarity. Are arranged in the same direction. Similarly, solar cells C 31 and C 3k positioned at both ends of the third solar cell group G 3 and solar cells C 41 and C 4k positioned at both ends of the fourth solar cell group G 4 are respectively The electrodes having the same polarity are arranged so as to face the same direction.

これに対して、第２の太陽電池群Ｇ２の一端に位置する太陽電池セルＣ２１と第３の太陽電池群Ｇ３の一端に位置する太陽電池セルＣ３１は、互いに異なる極性の電極が同一方向を向くように配置されている。具体的には、太陽電池モジュールの表面側に太陽電池セルＣ２１の正極（第１の主面）及び太陽電池セルＣ３１の負極（第２の主面）が配置されている。 In contrast, the solar cell C 31 in which the solar cells C 21 located in the second end of the solar cell group G 2 located on the third end of the solar cell group G 3 may have different polarities of the electrodes It is arranged to face the same direction. Specifically, the positive electrode (first main surface) of the solar cell C 21 and the negative electrode (second main surface) of the solar cell C 31 are arranged on the surface side of the solar cell module.

第１〜第４の接続部材Ｓ１〜Ｓ４は、第１〜第４の太陽電池群Ｇ１〜Ｇ４の一端に位置する太陽電池セルＣ１１、Ｃ２１、Ｃ３１、Ｃ４１の裏面側に表出した電極間を接続する。第１及び第２の接続部材Ｓ１、Ｓ２は、第１及び第２の太陽電池群Ｇ１、Ｇ２の他端に位置する太陽電池セルＣ１ｋ、Ｃ２ｋの裏面側に表出した電極間、及び第３及び第４の太陽電池群Ｇ３、Ｇ４の他端に位置する太陽電池セルＣ３ｋ、Ｃ４ｋの裏面側に表出した電極間を接続する。 First to fourth connecting members S1~S4 are the first to the back side of the fourth solar cell C 11 located at one end of the solar cell group G 1 ~G 4, C 21, C 31, C 41 Connect the exposed electrodes. First and second connecting members S1, S2 is between the first and second solar cell group G 1, the solar cell located at the other end of the G 2 C 1k, electrodes exposed on the back side of the C 2k The electrodes exposed on the back side of the solar cells C 3k and C 4k located at the other ends of the third and fourth solar cell groups G 3 and G 4 are connected.

このように、第１〜第４の接続部材Ｓ１〜Ｓ４により、第１の太陽電池群Ｇ１と第２の太陽電池群Ｇ２の間が電気的に並列に接続され、第２の太陽電池群Ｇ２と第３の太陽電池群Ｇ３の間が電気的に直列に接続され、第３の太陽電池群Ｇ３と第４の太陽電池群Ｇ４の間が電気的に並列に接続される。 Thus, the first to fourth connecting members S1 to S4, between the first solar cell group G 1 and the second solar cell group G 2 are electrically connected in parallel, the second solar cell between groups G 2 and the third solar cell group G 3 are electrically connected in series, between the third solar cell group G 3 of the fourth solar cell group G 4 are electrically connected in parallel The

電気的に直列に接続された一連の第２及び第３の太陽電池群Ｇ２、Ｇ３の両端に位置する太陽電池セルＣ２ｋと太陽電池セルＣ３ｋには、太陽電池モジュールが発電した電力を外部へ取り出すための出力端子Ｔ１及び出力端子Ｔ２がそれぞれ接続されている。 The solar cell C 2k and the solar cell C 3k located at both ends of the series of second and third solar cell groups G 2 and G 3 electrically connected in series include electric power generated by the solar cell module. Are connected to an output terminal T1 and an output terminal T2, respectively.

第１乃至第４の太陽電池群Ｇ１〜Ｇ４を構成する所定数の太陽電池セル、及び所定数の太陽電池セルを接続するタブ配線１１については、図１に示した太陽電池モジュールと同じであるため、説明を省略する。 A predetermined number of solar battery cells constituting the first through fourth solar cell group G 1 ~G 4, and for the wiring member 11 connecting a predetermined number of solar cell is the same as the solar cell module shown in FIG. 1 Therefore, the description is omitted.

図７は、第１〜第４の太陽電池群Ｇ１〜Ｇ４の一端に位置する太陽電池セルＣ１１、Ｃ２１、Ｃ３１、Ｃ４１の裏面側の構成を拡大して示す平面図である。図７を参照して、Ｙ方向に隣接する太陽電池セルＣ１１、Ｃ２１、Ｃ３１、Ｃ４１を電気的に接続する第１〜第４の接続部材Ｓ１〜Ｓ４の構成について説明する。なお、太陽電池セルＣ１１、Ｃ２１、Ｃ３１、Ｃ４１の構成については、図２（ａ）及び図２（ｂ）の太陽電池セルＣ１１、Ｃ２１と同じであるため、説明を省略する。また、太陽電池セルＣ１ｋ、Ｃ２ｋの間、及び太陽電池セルＣ３ｋ、Ｃ４ｋの間を電気的に並列に接続する第１及び第２の接続部材Ｓ１、Ｓ２は、図４と同じ構成を備えるため、説明を省略する。 FIG. 7 is an enlarged plan view showing the configuration of the back side of the solar cells C 11 , C 21 , C 31 , C 41 located at one end of the first to fourth solar cell groups G 1 to G 4 . is there. Referring to FIG. 7, the configuration of the first to fourth connecting members S1~S4 for electrically connecting the solar cells C 11, C 21, C 31 , C 41 adjacent in the Y direction. Since the configuration of the solar cell C 11, C 21, C 31 , C 41, is the same as the solar cell C 11, C 21 in FIGS. 2 (a) and 2 (b), omitted To do. Further, during the solar cell C 1k, C 2k, and first and second connecting members S1, S2 electrically connected in parallel between the solar cells C 3k, C 4k has the same configuration as FIG. 4 Therefore, the description is omitted.

第１〜第４の接続部材Ｓ１〜Ｓ４は、第２の方向（Ｙ方向）に沿って伸ばされ、Ｘ方向に伸びる８のバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２、Ｈ３１、Ｈ３２、Ｈ４１、Ｈ４２とそれぞれ交差している。第１〜第４の接続部材Ｓ１〜Ｓ４は、Ｘ方向に所定の隙間をおいて配置して構わないが、この場合、第１〜第４の接続部材Ｓ１〜Ｓ４は、他の手段を用いて、互いに電気的に接続されていることが望ましい。または、第１〜第４の接続部材Ｓ１〜Ｓ４を、隙間無く並べることにより電気的に接続しても構わない。 The first to fourth connecting members S1 to S4 are extended along the second direction (Y direction) and extended in the X direction to eight bus bar electrodes H 11 , H 12 , H 21 , H 22 , H 31 , Crosses H 32 , H 41 , and H 42 , respectively. The first to fourth connecting members S1 to S4 may be arranged with a predetermined gap in the X direction. In this case, the first to fourth connecting members S1 to S4 use other means. It is desirable that they are electrically connected to each other. Alternatively, the first to fourth connecting members S1 to S4 may be electrically connected by arranging them without gaps.

第１〜第４の接続部材Ｓ１〜Ｓ４は、バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２、Ｈ３１、Ｈ３２、Ｈ４１、Ｈ４２上に配置されている。第１の接続部材Ｓ１は、交差箇所Ｆ１１、Ｆ１２において、バスバー電極Ｈ１１及びバスバー電極Ｈ３１に接着され、電気的に接続されているが、残りのバスバー電極Ｈ１２、Ｈ２１、Ｈ２２、Ｈ３２、Ｈ４１、Ｈ４２には接着されていない。第２の接続部材Ｓ２は、交差箇所Ｆ２１、Ｆ２２において、バスバー電極Ｈ１２及びバスバー電極Ｈ３２に接着され、電気的に接続されているが、残りのバスバー電極Ｈ１１、Ｈ２１、Ｈ２２、Ｈ３１、Ｈ４１、Ｈ４２には接着されていない。第３の接続部材Ｓ３は、交差箇所Ｆ３１、Ｆ３２において、バスバー電極Ｈ２１及びバスバー電極Ｈ４１に接着され、電気的に接続されているが、残りのバスバー電極Ｈ１１、Ｈ１２、Ｈ２２、Ｈ３１、Ｈ３２、Ｈ４２には接着されていない。第４の接続部材Ｓ４は、交差箇所Ｆ４１、Ｆ４２において、バスバー電極Ｈ２２及びバスバー電極Ｈ４２に接着され、電気的に接続されているが、残りのバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ３１、Ｈ３２、Ｈ４１には接着されていない。 First to fourth connecting members S1~S4 is disposed on the bus bar electrode H 11, H 12, H 21 , H 22, H 31, H 32, H 41, H 42. The first connecting member S1 is at the intersection F 11, F 12, is bonded to the bus bar electrode H 11 and the bus bar electrodes H 31, have been electrically connected, the remaining bus bar electrodes H 12, H 21, H 22 , H 32 , H 41 , H 42 are not bonded. The second connecting member S2 is at the intersection F 21, F 22, is bonded to the bus bar electrode H 12 and the bus bar electrodes H 32, but are electrically connected, the remaining bus bar electrodes H 11, H 21, H 22 , H 31 , H 41 , and H 42 are not bonded. The third connecting member S3 is bonded and electrically connected to the bus bar electrode H 21 and the bus bar electrode H 41 at the intersections F 31 and F 32 , but the remaining bus bar electrodes H 11 , H 12 , H 22 , H 31 , H 32 , and H 42 are not bonded. The fourth connecting member S4 is bonded and electrically connected to the bus bar electrode H 22 and the bus bar electrode H 42 at the intersections F 41 and F 42 , but the remaining bus bar electrodes H 11 , H 12 , H 21 , H 31 , H 32 , and H 41 are not bonded.

このように、第１乃至第４の接続部材Ｓ１〜Ｓ４は、バスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２の中の１のバスバー電極のみにそれぞれ接着されているので、第１〜第４の接続部材Ｓ１〜Ｓ４と太陽電池セルＣ１１、Ｃ２１（セル基板）との間に熱膨張係数の違いがあっても、第１〜第４の接続部材Ｓ１〜Ｓ４を太陽電池セルＣ１１、Ｃ２１に接続する時に太陽電池セルＣ１１、Ｃ２１の反りが抑制され、太陽電池モジュールの生産性が向上する。更に、第１〜第４の接続部材Ｓ１〜Ｓ４が、互いに異なるバスバー電極に接着され、互いに電気的に接続されているので、電気抵抗が低減し、第１〜第４の太陽電池セルＣ１１、Ｃ２１、Ｃ３１、Ｃ４１の間の電気的接続を確固たるものとすることができる。 As described above, the first to fourth connection members S1 to S4 are bonded to only one bus bar electrode among the bus bar electrodes H 11 , H 12 , H 21 , and H 22 , respectively. Even if there is a difference in thermal expansion coefficient between the four connecting members S1 to S4 and the solar cells C 11 and C 21 (cell substrate), the first to fourth connecting members S1 to S4 are connected to the solar cell C. 11 , the warpage of the solar cells C 11 and C 21 is suppressed when connecting to the C 21, and the productivity of the solar cell module is improved. Further, the first to fourth connecting members S1~S4 are bonded to different bus bar electrodes together, since they are electrically connected to each other, the electrical resistance is reduced, the first to fourth solar cell C 11 , C 21 , C 31 , C 41 can be secured.

なお、第１〜第４の接続部材Ｓ１〜Ｓ４は、それぞれ、接着されていないバスバー電極に電気的に接触していることが望ましい。これにより、太陽電池セルＣ１１、Ｃ２１、Ｃ３１、Ｃ４１の間の電気的接続を確固たるものとすることができる。
（その他の実施の形態）
上記のように、本発明は、４つの実施の形態によって記載したが、この開示の一部をなす論述及び図面はこの発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかとなろう。 The first to fourth connecting members S1 to S4 are preferably in electrical contact with the bus bar electrodes that are not bonded. Thus, the electrical connection between the solar cells C 11, C 21, C 31 , C 41 can be solidify.
(Other embodiments)
As described above, the present invention has been described with reference to the four embodiments. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

図５の例では、２の太陽電池セルＣ１１、Ｃ２１が、それぞれ、２のバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２を備え、４の接続部材Ｓ１〜Ｓ４が４のバスバー電極Ｈ１１、Ｈ１２、Ｈ２１、Ｈ２２にそれぞれ接続されている場合について説明した。しかし、各太陽電池セルが備えるバスバー電極の数や接続部材により接続される太陽電池セルの数は、これらに限定されることはない。各太陽電池セルが備えるバスバー電極の数をｍ（ｍは２以上の自然数）とし、接続部材により接続される太陽電池セルの数をｎ（ｎは２以上の自然数）とした場合に、第１乃至第ｐの接続部材を用いて、第１乃至第ｎの太陽電池セルを電気的に接続することができる。なお、ｐはｍとｎを乗算した数字である。 In the example of FIG. 5, the two solar cells C 11 and C 21 are each provided with two bus bar electrodes H 11 , H 12 , H 21 , and H 22 , and four connection members S 1 to S 4 are four bus bar electrodes. The case where it is connected to H 11 , H 12 , H 21 , and H 22 has been described. However, the number of bus bar electrodes provided in each solar battery cell and the number of solar battery cells connected by the connecting member are not limited to these. When the number of bus bar electrodes included in each solar cell is m (m is a natural number of 2 or more) and the number of solar cells connected by the connection member is n (n is a natural number of 2 or more), the first The 1st thru | or nth photovoltaic cell can be electrically connected using thru | or a pth connection member. Note that p is a number obtained by multiplying m and n.

この場合、太陽電池モジュールは、第２の方向（Ｙ方向）に隣接する第１乃至第ｎの太陽電池セルＣ１１〜Ｃｎ１と、第１乃至第ｎの太陽電池セルＣ１１〜Ｃｎ１の間を電気的に接続する第１乃至第ｐの接続部材Ｓ１〜Ｓｐとを少なくとも備える。第１乃至第ｎの太陽電池セルＣ１１〜Ｃｎ１は、光電変換部２１の主面上に配置された第１の方向（Ｘ方向）に伸びる第１及び第ｍのバスバー電極（集電極）をそれぞれ備える。第１乃至第ｐの接続部材Ｓ１〜Ｓｐは、互いに異なる１のバスバー電極（集電極）のみにそれぞれ接着され、互いに電気的に接続されている。 In this case, the solar cell module includes a solar cell C 11 -C n1 of the first to n adjacent in the second direction (Y-direction), of the solar cell C 11 -C n1 of the first through n 1st thru | or pth connection member S1-Sp which electrically connects between is provided. Solar cells C 11 -C n1 of the first to n-th first and bus bar electrode of the m extending in a first direction disposed on the main surface of the photoelectric conversion unit 21 (X direction) (collector electrode) Each is provided. The first to p-th connecting members S1 to Sp are bonded to only one different bus bar electrode (collector electrode) and are electrically connected to each other.

第１乃至第ｐの接続部材Ｓ１〜Ｓｐは、１のバスバー電極のみにそれぞれ接着されているので、第１乃至第ｐの接続部材Ｓ１〜Ｓｐと太陽電池セル（セル基板）との間に熱膨張係数の違いがあっても、第１乃至第ｐの接続部材Ｓ１〜Ｓｐを太陽電池セル（セル基板）に接続する時に太陽電池セル（セル基板）の反りが抑制され、太陽電池モジュールの生産性が向上する。更に、第１乃至第ｐの接続部材Ｓ１〜Ｓｐが、互いに異なるバスバー電極に接着され、互いに電気的に接続されているので、電気抵抗が低減し、第１乃至第ｎの太陽電池セルＣ１１〜Ｃｎ１の間の電気的接続を確固たるものとすることができる。 Since the first to p-th connection members S1 to Sp are bonded to only one bus bar electrode, heat is generated between the first to p-th connection members S1 to Sp and the solar cell (cell substrate). Even when there is a difference in expansion coefficient, the warpage of the solar cell (cell substrate) is suppressed when the first to p-th connecting members S1 to Sp are connected to the solar cell (cell substrate), and the solar cell module is produced. Improves. Further, since the first to p-th connecting members S1 to Sp are bonded to different bus bar electrodes and are electrically connected to each other, the electric resistance is reduced, and the first to n-th solar cells C 11 are connected. The electrical connection between ~ Cn1 can be made firm.

また、本発明の実施の形態では、バスバー電極上に接続部材を配置する場合について説明したが、バスバー電極上に形成されるタブ配線の上に接続部材が配置されていても構わない。ここで、タブ配線は、Ｘ方向に沿って並べられた所定数の太陽電池セルを電気的に直列に接続する手段の一例であり、これにより、太陽電池群（ストリング）が形成される。   In the embodiment of the present invention, the connection member is disposed on the bus bar electrode. However, the connection member may be disposed on the tab wiring formed on the bus bar electrode. Here, the tab wiring is an example of means for electrically connecting a predetermined number of solar cells arranged in the X direction in series, whereby a solar cell group (string) is formed.

更に、本発明の実施の形態では、接続部材が、太陽電池モジュールの裏面側に形成されている場合について説明したが、太陽電池モジュールの表面側に形成されていても構わない。   Furthermore, although the case where the connection member is formed on the back surface side of the solar cell module has been described in the embodiment of the present invention, it may be formed on the front surface side of the solar cell module.

このように、本発明はここでは記載していない様々な実施の形態等を包含するということを理解すべきである。したがって、本発明はこの開示から妥当な特許請求の範囲に係る発明特定事項によってのみ限定されるものである。   Thus, it should be understood that the present invention includes various embodiments and the like not described herein. Therefore, the present invention is limited only by the invention specifying matters according to the scope of claims reasonable from this disclosure.

図１は、本発明の第１の実施の形態に係わる太陽電池モジュールの構成を示す平面図である。FIG. 1 is a plan view showing the configuration of the solar cell module according to the first embodiment of the present invention. 図２（ａ）は第１及び第２の太陽電池群Ｇ１、Ｇ２の間の直列接続部分を拡大した平面図であり、図２（ｂ）は図２（ａ）のＡ−Ａ切断面に沿った断面図である。FIG. 2A is an enlarged plan view of a series connection portion between the first and second solar cell groups G 1 and G 2 , and FIG. 2B is a cross-sectional view taken along line AA in FIG. It is sectional drawing along the surface. 図３は、光電変換部２１の断面構成を示す断面図である。FIG. 3 is a cross-sectional view illustrating a cross-sectional configuration of the photoelectric conversion unit 21. 図４は第２の実施の形態における、第１及び第２の太陽電池群Ｇ１、Ｇ２の間の直列接続部分を拡大した平面図である。FIG. 4 is an enlarged plan view of a series connection portion between the first and second solar cell groups G 1 and G 2 in the second embodiment. 図５は第３の実施の形態における、第１及び第２の太陽電池群Ｇ１、Ｇ２の間の直列接続部分を拡大した平面図である。FIG. 5 is an enlarged plan view of a series connection portion between the first and second solar cell groups G 1 and G 2 in the third embodiment. 図６は、本発明の第４の実施の形態に係わる太陽電池モジュールの構成を示す平面図である。FIG. 6 is a plan view showing the configuration of the solar cell module according to the fourth embodiment of the present invention. 図７は第４の実施の形態における、第１乃至第４の太陽電池群Ｇ１〜Ｇ４の間の接続部分を拡大した平面図である。FIG. 7 is an enlarged plan view of a connection portion between the first to fourth solar cell groups G 1 to G 4 in the fourth embodiment.

符号の説明Explanation of symbols

１１…タブ配線
１３…フィンガー電極
２１…光電変換部
３１…基板
３２、３６…ｉ型層
３３…ｐ型層
３４、３８…透明導電膜
３７…ｎ型層
Ｃ…太陽電池セル
Ｄ…隙間
Ｆ…交差箇所
Ｇ…太陽電池群
Ｈ…バスバー電極（集電極）
Ｓ１〜Ｓ４…接続部材
Ｔ１、Ｔ２…出力端子 DESCRIPTION OF SYMBOLS 11 ... Tab wiring 13 ... Finger electrode 21 ... Photoelectric conversion part 31 ... Substrate 32, 36 ... i-type layer 33 ... p-type layer 34, 38 ... Transparent conductive film 37 ... n-type layer C ... Solar cell D ... Gap F ... Crossing point G ... Solar cell group H ... Busbar electrode (collector electrode)
S1 to S4: Connection member T1, T2: Output terminal

Claims (4)

光入射により光生成キャリアを発生させる光電変換部と、前記光電変換部の主面上に配置された第１の方向に伸びる２以上のバスバー電極とを備える第１の太陽電池セルと、
前記第１の太陽電池セルと前記第１の方向に対して略直交する第２の方向に隣接する第２の太陽電池セルとの間を電気的に接続する第１の接続部材とを備え、
前記第１の接続部材は、前記第１の太陽電池セルが備える前記２以上のバスバー電極の中の１のバスバー電極のみに接着されている
ことを特徴とする太陽電池モジュール。 A first solar cell comprising: a photoelectric conversion unit that generates photogenerated carriers by light incidence; and two or more bus bar electrodes that are arranged on a main surface of the photoelectric conversion unit and extend in a first direction;
A first connection member that electrically connects the first solar battery cell and a second solar battery cell adjacent to a second direction substantially orthogonal to the first direction;
The first connection member is bonded to only one bus bar electrode of the two or more bus bar electrodes included in the first solar cell. The solar cell module. 前記第１の太陽電池セルと前記第２の太陽電池セルとを電気的に接続する第２の接続部材を更に備え、
前記第２の接続部材は、前記第１の太陽電池セルが備える前記２以上のバスバー電極の中の他の１のバスバー電極のみに接着されている
ことを特徴とする請求項１記載の太陽電池モジュール。 A second connecting member for electrically connecting the first solar cell and the second solar cell;
2. The solar cell according to claim 1, wherein the second connection member is bonded to only one other bus bar electrode of the two or more bus bar electrodes included in the first solar cell. module. 前記第１の接続部材と第２の接続部材は、互いに電気的に接続されていることを特徴とする請求項２記載の太陽電池モジュール。   The solar cell module according to claim 2, wherein the first connection member and the second connection member are electrically connected to each other. 光入射により光生成キャリアを発生させる光電変換部と、前記光電変換部の主面上に配置された第１の方向に伸びる第１及び第ｍ（ｍは２以上の自然数）のバスバー電極とをそれぞれ備え、前記第１の方向に対して略直交する第２の方向に隣接する第１乃至第ｎ（ｎは２以上の自然数）の太陽電池セルと、
前記第１乃至第ｎの太陽電池セルの間を電気的に接続する第１乃至第ｐの接続部材とを備え、
前記ｐはｍとｎを乗算した数字であり、前記第１乃至第ｐの接続部材は、互いに異なる１のバスバー電極のみにそれぞれ接着され、互いに電気的に接続されている
ことを特徴とする太陽電池モジュール。 A photoelectric conversion unit that generates photogenerated carriers by light incidence, and first and m-th (m is a natural number of 2 or more) bus bar electrodes that are arranged on a main surface of the photoelectric conversion unit and extend in a first direction. 1st to n-th (n is a natural number of 2 or more) solar cells adjacent to each other in a second direction substantially orthogonal to the first direction;
A first to p-th connection member that electrically connects the first to n-th solar cells,
The p is a number obtained by multiplying m and n, and the first to p-th connecting members are respectively bonded to only one different bus bar electrode and electrically connected to each other. Battery module.
JP2007077237A 2007-03-23 2007-03-23 Solar cell module Expired - Fee Related JP4989268B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007077237A JP4989268B2 (en) 2007-03-23 2007-03-23 Solar cell module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007077237A JP4989268B2 (en) 2007-03-23 2007-03-23 Solar cell module

Publications (2)

Publication Number Publication Date
JP2008235817A true JP2008235817A (en) 2008-10-02
JP4989268B2 JP4989268B2 (en) 2012-08-01

Family

ID=39908218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007077237A Expired - Fee Related JP4989268B2 (en) 2007-03-23 2007-03-23 Solar cell module

Country Status (1)

Country Link
JP (1) JP4989268B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102623520A (en) * 2011-12-15 2012-08-01 友达光电股份有限公司 Solar cell and solar power generation module

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03165070A (en) * 1989-09-08 1991-07-17 Solarex Corp Solar battery panel
JPH11354822A (en) * 1998-06-05 1999-12-24 Sanyo Electric Co Ltd Double-side incidence type solar cell module
JP2001210849A (en) * 2000-01-24 2001-08-03 Sumitomo Wiring Syst Ltd Connector for solar battery panel
JP2006019440A (en) * 2004-06-30 2006-01-19 Kyocera Corp Solar battery module
JP2006278904A (en) * 2005-03-30 2006-10-12 Sanyo Electric Co Ltd Solar cell module and solar cell device equipped with the module
JP2007294866A (en) * 2006-03-31 2007-11-08 Sanyo Electric Co Ltd Photovoltaic module

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03165070A (en) * 1989-09-08 1991-07-17 Solarex Corp Solar battery panel
JPH11354822A (en) * 1998-06-05 1999-12-24 Sanyo Electric Co Ltd Double-side incidence type solar cell module
JP2001210849A (en) * 2000-01-24 2001-08-03 Sumitomo Wiring Syst Ltd Connector for solar battery panel
JP2006019440A (en) * 2004-06-30 2006-01-19 Kyocera Corp Solar battery module
JP2006278904A (en) * 2005-03-30 2006-10-12 Sanyo Electric Co Ltd Solar cell module and solar cell device equipped with the module
JP2007294866A (en) * 2006-03-31 2007-11-08 Sanyo Electric Co Ltd Photovoltaic module

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102623520A (en) * 2011-12-15 2012-08-01 友达光电股份有限公司 Solar cell and solar power generation module
US9224887B2 (en) 2011-12-15 2015-12-29 Au Optronics Corp. Solar cell and solar cell module
EP2605288A3 (en) * 2011-12-15 2017-01-11 AU Optronics Corp. Solar cell and solar cell module

Also Published As

Publication number Publication date
JP4989268B2 (en) 2012-08-01

Similar Documents

Publication Publication Date Title
US10084104B2 (en) Solar panel
JP4989549B2 (en) Solar cell and solar cell module
JP5445419B2 (en) Solar cell module and manufacturing method thereof
JP5642370B2 (en) Solar cell module
JP6624418B2 (en) Solar cell module
JP2005011869A (en) Solar cell module and its manufacturing method
JP5927437B2 (en) Solar cell module
JP5384164B2 (en) Solar cell and solar cell module
JP2007201331A (en) Photovoltaic module
JP5507034B2 (en) Solar cell module and manufacturing method thereof
JP2008300449A (en) Solar cell module and method of manufacturing the same
JP5879514B2 (en) Solar cell module
JP2010050350A (en) Solar cell module and solar cell
JP2000101122A (en) Solar battery module
JP5196821B2 (en) Solar cell module
JP5153279B2 (en) Solar cell module
JP2000114572A (en) Solar battery module
JP4989268B2 (en) Solar cell module
JP2008270619A (en) Solar battery module
US20130008481A1 (en) Electrically connecting element and photovoltaic module
JP2011160008A (en) Solar cell module
JP3972233B2 (en) Solar cell module
JP2004103834A (en) Solar cell module
JP2010263253A (en) Photovoltaic module
JP2008235818A (en) Solar cell module

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100316

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110419

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110420

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110617

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120403

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20120427

R151 Written notification of patent or utility model registration

Ref document number: 4989268

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150511

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees