JPH06318727A - Solar battery element - Google Patents
Solar battery elementInfo
- Publication number
- JPH06318727A JPH06318727A JP5105451A JP10545193A JPH06318727A JP H06318727 A JPH06318727 A JP H06318727A JP 5105451 A JP5105451 A JP 5105451A JP 10545193 A JP10545193 A JP 10545193A JP H06318727 A JPH06318727 A JP H06318727A
- Authority
- JP
- Japan
- Prior art keywords
- cells
- surface side
- cell
- light receiving
- positive
- 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.)
- Pending
Links
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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数の太陽電池セルを
直列に接続した太陽電池素子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell element in which a plurality of solar cells are connected in series.
【０００２】[0002]
【従来の技術】従来、単体の太陽電池セルを複数個並設
した太陽電池素子、いわゆるソーラパネルでは、一般に
表面側にマイナス電極、裏面側にプラス電極が設置され
るか、あるいは逆になっている。そして、例えば特開昭
５３−１４１５９４号公報に示されるように、セルを直
列接続する場合には、互いに隣接するセル間で、一方の
セルの表面の電極から、隣接するセルの裏面の電極へリ
ード線を渡している。2. Description of the Related Art Heretofore, in a solar cell element in which a plurality of single solar cells are arranged side by side, that is, a so-called solar panel, a minus electrode is generally provided on the front side and a plus electrode is provided on the back side, or vice versa. There is. Then, as shown in, for example, Japanese Patent Application Laid-Open No. 53-141594, when cells are connected in series, between the cells adjacent to each other, the electrode on the front surface of one cell is changed to the electrode on the back surface of the adjacent cell. Passing the lead wire.
【０００３】[0003]
【発明が解決しようとする課題】ところで、例えば車載
用のソーラパネルでは、システム電圧が高い（例えば１
００〜１５０Ｖ）ため、限られた面積に設置しようとす
ると、各セルの面積を小さくして直列接続するセル数を
増やす必要があり、一般に２０ｍｍ×４０ｍｍ程度のセ
ルが使われている。By the way, for example, in a vehicle-mounted solar panel, the system voltage is high (for example, 1
Therefore, in order to install in a limited area, it is necessary to reduce the area of each cell to increase the number of cells connected in series, and generally a cell of about 20 mm × 40 mm is used.
【０００４】ところが、従来のソーラパネルでは、隣接
するセル間にリード線を渡す必要があるため、セル間で
最低２ｍｍ程度のスペースが必要であった。そのため、
このスペースが無駄となり、有効受光面積が８５〜９０
％程度となっていた。また、セルの表面側から裏面側へ
リード線を渡すため、例えば裏面側の半田付けを行った
後、裏返して表面側の半田付けを行う必要があり、製造
時の作業性が悪いという問題点があった。However, in the conventional solar panel, since it is necessary to pass a lead wire between adjacent cells, a space of at least about 2 mm is required between the cells. for that reason,
This space is wasted and the effective light receiving area is 85 to 90.
It was about%. Further, in order to pass the lead wire from the front surface side to the back surface side of the cell, it is necessary to turn the back surface side and then to turn the front surface side to solder, for example, after the back surface side is soldered. was there.
【０００５】上述のスペースの無駄をなくすためにいく
つかの提案がなされている。例えば実開昭５６−２６９
７１号公報には、その第１図にセルを瓦積みにしてセル
間の無駄なスペースをなくす技術が示されている。しか
しながら、この技術では、ソーラパネルを車載した場
合、振動により、セルが重なり合う部分に応力がかか
り、破損する可能性があるという問題点がある。また、
信頼性確保のため、基板厚みが少なくとも３００μｍ以
上のものを使用する必要があり、高効率のセルを使用す
ることができなかった。また、セルにかげになる部分が
生じ、特性を十分に出すことができなかった。また、材
料費がかかるため、低コスト化ができなかった。Several proposals have been made to eliminate the above-mentioned waste of space. For example, actual development Sho 56-269
In Japanese Patent Publication No. 71, a technique is shown in FIG. 1 in which cells are tiled to eliminate a wasteful space between cells. However, this technique has a problem that when a solar panel is mounted on a vehicle, vibration may apply a stress to the overlapping portions of the cells, resulting in damage. Also,
In order to ensure reliability, it was necessary to use a substrate having a thickness of at least 300 μm or more, and it was not possible to use a highly efficient cell. In addition, the cell has a shaded portion, and the characteristics cannot be sufficiently obtained. In addition, since the material cost is required, the cost cannot be reduced.
【０００６】また、実開昭５６−２６９７１号公報の第
２図には、表面電極をサイド部に設けた技術が示されて
いるが、この場合でも、電極同士の接触を避けるために
は、製作時の作業性も考慮すると、少なくとも１ｍｍ程
度のスペースを設ける必要がある。従って、この場合で
も、有効受光面積は９０〜９２％程度にとどまる。FIG. 2 of Japanese Utility Model Application Laid-Open No. 56-26971 discloses a technique in which surface electrodes are provided on the side portions. Even in this case, in order to avoid contact between electrodes, Considering workability during manufacturing, it is necessary to provide a space of at least about 1 mm. Therefore, even in this case, the effective light receiving area is about 90 to 92%.
【０００７】そこで本発明の目的は、太陽電池素子全体
における有効受光面積を増加させることができると共
に、製造時の作業性を向上させることができる太陽電池
素子を提供することにある。Therefore, an object of the present invention is to provide a solar cell element capable of increasing the effective light receiving area in the entire solar cell element and improving workability during manufacturing.
【０００８】[0008]
【課題を解決するための手段】本発明の太陽電池素子
は、受光時に受光面側が陽極となる陽光電セルと、この
陽光電セルと交互に並設され、受光時に受光面側が陰極
となる陰光電セルと、陽光電セルと陰光電セルを直列に
接続するために、隣接する陽光電セルと陰光電セルの受
光面側の電極同士または裏面側の電極同士を電気的に接
続する接続手段とを備えたものである。The solar cell element of the present invention is a negative photoelectric cell in which a light receiving surface side serves as an anode when receiving light, and this positive photoelectric cell is alternately arranged in parallel, and the light receiving surface side serves as a cathode in light receiving. Photoelectric cells, and a connecting means for electrically connecting the electrodes on the light receiving surface side or the electrodes on the back surface side of the adjacent positive photoelectric cells and negative photoelectric cells in order to connect the positive photoelectric cells and the negative photoelectric cells in series, It is equipped with.
【０００９】[0009]
【作用】この太陽電池素子では、陽光電セルと陰光電セ
ルとが交互に並設され、接続手段によって、隣接する陽
光電セルと陰光電セルの受光面側の電極同士または裏面
側の電極同士を電気的に接続することにより、陽光電セ
ルと陰光電セルが直列に接続される。In this solar cell element, the positive photoelectric cells and the negative photoelectric cells are alternately arranged side by side, and the light receiving surface side electrodes or the rear surface side electrodes of the adjacent positive photoelectric cells and negative photoelectric cells are connected by the connecting means. The positive and negative photoelectric cells are connected in series by electrically connecting.
【００１０】[0010]
【実施例】以下、本発明の実施例について詳細に説明す
る。EXAMPLES Examples of the present invention will be described in detail below.
【００１１】図１は本発明の一実施例のソーラパネルの
断面図、図２はその断面図である。これらの図に示すよ
うに、本実施例のソーラパネルは、受光時に受光面側が
陽極となる陽光電セル１と、この陽光電セル１と交互に
並設され、受光時に受光面側が陰極となる陰光電セル２
と、陽光電セル１と陰光電セル２を直列に接続するため
に、隣接する陽光電セル１と陰光電セル２の受光面側の
電極同士または裏面側の電極同士を電気的に接続する表
面リード線３および裏面側リード線４とを備えている。FIG. 1 is a sectional view of a solar panel according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof. As shown in these figures, in the solar panel of this embodiment, a positive photocell 1 whose light-receiving surface side serves as an anode during light reception, and this positive photocell 1 are alternately arranged in parallel, and the light-receiving surface side serves as a cathode during light reception. Negative photoelectric cell 2
And a surface for electrically connecting the electrodes on the light receiving surface side or the electrodes on the back surface side of the adjacent positive photoelectric cells 1 and negative photoelectric cells 2 in order to connect the positive photoelectric cells 1 and the negative photoelectric cells 2 in series. A lead wire 3 and a back surface side lead wire 4 are provided.
【００１２】例えば結晶Ｓｉ太陽電池を用いて本ソーラ
パネルを製作した場合、セル１、セル２はそれぞれ例え
ば図３、図４に示すような構成となる。When the present solar panel is manufactured by using, for example, a crystalline Si solar cell, the cell 1 and the cell 2 have the configurations shown in FIGS. 3 and 4, respectively.
【００１３】図３に示すように、セル１は、ｐ型Ｓｉ基
板１１を用い、表面側にＰ（リン）をドープしたｎ+ 層
１２を形成し、集電電極として、表面側に表面側電極１
３を設け、裏面側に裏面側電極１４を設ける。この場
合、表面側電極１３がマイナス電極となり、裏面側電極
１４がプラス電極となる。表面は、光の反射を防止する
ため、ピラミッド状の凹凸であるテクスチャ構造とす
る。また、裏面側電極１４と基板１１との電気抵抗を低
減するため、基板１１の裏面側にはＢ3+、Ａｌ3+等を深
さ１μｍ程度拡散したｐ+ 層１５を形成している。As shown in FIG. 3, in the cell 1, a p-type Si substrate 11 is used, an n + layer 12 doped with P (phosphorus) is formed on the surface side, and as a collector electrode, the surface side is formed on the surface side. Electrode 1
3 is provided, and the back surface side electrode 14 is provided on the back surface side. In this case, the front surface side electrode 13 becomes a negative electrode and the back surface side electrode 14 becomes a positive electrode. In order to prevent light reflection, the surface has a textured structure with pyramid-shaped irregularities. Further, in order to reduce the electric resistance between the back surface side electrode 14 and the substrate 11, a p + layer 15 is formed on the back surface side of the substrate 11 in which B 3+ , Al 3+, etc. are diffused to a depth of about 1 μm.
【００１４】一方、図４に示すように、セル２は、ｎ型
Ｓｉ基板２１を用い、表面側にＡｌ3+、Ｂ3+等を拡散し
たｐ+ 層２２を形成し、表面側に表面側電極２３を設
け、裏面側に裏面側電極２４を設ける。この場合、表面
側電極２３がプラス電極、裏面側電極１４がマイナス電
極となる。表面は光の反射を防止するためテクスチャ構
造とし、裏面側電極２４と基板２１との電気抵抗を低減
するため基板２１の裏面側にはｎ+ 層２５を形成する。On the other hand, as shown in FIG. 4, the cell 2 uses an n-type Si substrate 21 and has a p + layer 22 in which Al 3+ , B 3+, etc. are diffused on the surface side, and a surface on the surface side. The side electrode 23 is provided, and the back surface side electrode 24 is provided on the back surface side. In this case, the front surface side electrode 23 becomes a positive electrode and the back surface side electrode 14 becomes a negative electrode. The front surface has a texture structure to prevent reflection of light, and an n + layer 25 is formed on the back surface side of the substrate 21 to reduce the electric resistance between the back surface side electrode 24 and the substrate 21.
【００１５】この結果、セル１とセル２は流れる電流の
向きが逆になるが、図５に示すように、電流−電圧特性
は全く同一となる。あるいは、例えばセルの大きさを変
える等して、電流−電圧特性が同じになるように設計す
る。As a result, although the directions of the currents flowing through the cells 1 and 2 are opposite to each other, the current-voltage characteristics are exactly the same as shown in FIG. Alternatively, for example, the size of the cell is changed so that the current-voltage characteristics are the same.
【００１６】図１および図２に示すように、セル１とセ
ル２は互いに密着して交互に並べて配置され、セル１の
表面側電極１２は表面リード３によって図の右側のセル
２の表面側電極２２に接続され、セル１の裏面側電極１
４は裏面側リード４によって図の左側のセル２の裏面側
電極２４に接続されている。このようにして、多数のセ
ル１とセル２が直列に接続されている。As shown in FIGS. 1 and 2, the cells 1 and 2 are arranged in close contact with each other and arranged alternately, and the surface side electrode 12 of the cell 1 is connected by the surface lead 3 to the surface side of the cell 2 on the right side of the drawing. The back side electrode 1 of the cell 1 connected to the electrode 22
4 is connected to the back surface side electrode 24 of the cell 2 on the left side of the drawing by the back surface side lead 4. In this way, a large number of cells 1 and cells 2 are connected in series.
【００１７】このように本実施例のソーラパネルでは、
セル１とセル２の間で、表面側から裏面側にリード線を
渡す必要がないので、セル１とセル２を密着することが
可能となる。なお、セル同士を密着することで、リーク
電流等の発生が心配されるが、実際のセルの最表面は、
図３、図４に示すように、酸化膜（ＳｉＯ2 ）１６、２
６で覆われて絶縁されており問題はない。As described above, in the solar panel of this embodiment,
Since it is not necessary to pass the lead wire from the front surface side to the back surface side between the cell 1 and the cell 2, it is possible to bring the cell 1 and the cell 2 into close contact with each other. It should be noted that by closely contacting the cells with each other, there is a concern that a leak current or the like may occur, but the outermost surface of the actual cell is
As shown in FIGS. 3 and 4, oxide films (SiO 2 ) 16 and 2
There is no problem because it is covered with 6 and insulated.
【００１８】このように本実施例によれば、ソーラパネ
ルの有効受光面積（表面電極部を除く）が略１００％と
なり、従来に比べて出力比にして５〜１５％高い特性を
得ることができるようになった。As described above, according to the present embodiment, the effective light receiving area of the solar panel (excluding the surface electrode portion) is about 100%, and it is possible to obtain a characteristic that the output ratio is 5 to 15% higher than the conventional one. I can do it now.
【００１９】また、全セルを接触させてソーラパネルを
形成できるため、全体のパネル形状の寸法誤差を非常に
少なくすることが可能となる。Further, since the solar panel can be formed by bringing all the cells into contact with each other, the dimensional error of the entire panel shape can be extremely reduced.
【００２０】また、リード線の接続作業は、必ず表面同
士または裏面同士における半田付け作業となるため、作
業性が向上される。Further, since the work of connecting the lead wires is always a work of soldering the front surfaces to each other or the back surfaces to each other, the workability is improved.
【００２１】また、同じ出力を得るために必要な設置
台、セル被覆材（ガラス、透明樹脂等）等のパネル材料
を低減することができ、低コスト化が可能となる。Further, it is possible to reduce the panel materials such as the installation base and the cell coating material (glass, transparent resin, etc.) necessary for obtaining the same output, and the cost can be reduced.
【００２２】[0022]
【発明の効果】以上説明したように本発明によれば、陽
光電セルと陰光電セルとを交互に並設し、隣接する陽光
電セルと陰光電セルの受光面側の電極同士または裏面側
の電極同士を電気的に接続して陽光電セルと陰光電セル
を直列に接続したので、セル同士を密着でき、太陽電池
素子全体における有効受光面積を増加させることができ
ると共に、表面側から裏面側にリード線を渡す必要がな
いので製造時の作業性を向上させることができるという
効果がある。As described above, according to the present invention, the positive photoelectric cells and the negative photoelectric cells are alternately arranged in parallel, and the electrodes on the light receiving surface side of the adjacent positive photoelectric cells and the negative photoelectric cells or the back surface side Since the positive photoelectric cell and the negative photoelectric cell are connected in series by electrically connecting the electrodes to each other, the cells can be adhered to each other, and the effective light receiving area in the entire solar cell element can be increased, and from the front surface side to the back surface side. Since it is not necessary to pass a lead wire to the side, there is an effect that workability during manufacturing can be improved.
【図１】本発明の一実施例のソーラパネルの断面図であ
る。FIG. 1 is a sectional view of a solar panel according to an embodiment of the present invention.
【図２】図１のソーラパネルの斜視図である。2 is a perspective view of the solar panel of FIG. 1. FIG.
【図３】図１の陽光電セルの断面図である。3 is a cross-sectional view of the positive photocell of FIG.
【図４】図１の陰光電セルの断面図である。4 is a cross-sectional view of the negative photoelectric cell of FIG.
【図５】図１の陽光電セルおよび陰光電セルの電流−電
圧特性を示す特性図である。5 is a characteristic diagram showing current-voltage characteristics of the positive photoelectric cell and the negative photoelectric cell of FIG.
１ 陽光電セル ２ 陰光電セル ３ 表面リード線 ４ 裏面側リード線 1 Positive Photoelectric Cell 2 Negative Photoelectric Cell 3 Front Lead Wire 4 Back Side Lead Wire
Claims (1)
ルと、 この陽光電セルと交互に並設され、受光時に受光面側が
陰極となる陰光電セルと、 前記陽光電セルと陰光電セルを直列に接続するために、
隣接する陽光電セルと陰光電セルの受光面側の電極同士
または裏面側の電極同士を電気的に接続する接続手段と
を具備することを特徴とする太陽電池素子。1. A positive photoelectric cell whose light-receiving surface side serves as an anode when receiving light, a negative photoelectric cell which is alternately arranged in parallel with this positive photoelectric cell and whose light-receiving surface side serves as a cathode when receiving light, said positive photoelectric cell and negative photoelectric cell To connect in series
A solar cell element comprising: a positive photoelectric cell and a negative photoelectric cell, which are adjacent to each other, and electrically connecting electrodes on the light-receiving surface side or electrodes on the rear surface side of the photoelectric cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5105451A JPH06318727A (en) | 1993-05-06 | 1993-05-06 | Solar battery element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5105451A JPH06318727A (en) | 1993-05-06 | 1993-05-06 | Solar battery element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06318727A true JPH06318727A (en) | 1994-11-15 |
Family
ID=14407958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5105451A Pending JPH06318727A (en) | 1993-05-06 | 1993-05-06 | Solar battery element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06318727A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004247402A (en) * | 2003-02-12 | 2004-09-02 | Sanyo Electric Co Ltd | Solar cell module and its manufacturing method |
| JP2007103537A (en) * | 2005-09-30 | 2007-04-19 | Sanyo Electric Co Ltd | Solar battery module |
| JP2007103536A (en) * | 2005-09-30 | 2007-04-19 | Sanyo Electric Co Ltd | Solar battery module |
| JP2007201331A (en) * | 2006-01-30 | 2007-08-09 | Sanyo Electric Co Ltd | Photovoltaic module |
| JP2011077103A (en) * | 2009-09-29 | 2011-04-14 | Kyocera Corp | Solar cell module |
-
1993
- 1993-05-06 JP JP5105451A patent/JPH06318727A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004247402A (en) * | 2003-02-12 | 2004-09-02 | Sanyo Electric Co Ltd | Solar cell module and its manufacturing method |
| JP2007103537A (en) * | 2005-09-30 | 2007-04-19 | Sanyo Electric Co Ltd | Solar battery module |
| JP2007103536A (en) * | 2005-09-30 | 2007-04-19 | Sanyo Electric Co Ltd | Solar battery module |
| JP2007201331A (en) * | 2006-01-30 | 2007-08-09 | Sanyo Electric Co Ltd | Photovoltaic module |
| JP2011077103A (en) * | 2009-09-29 | 2011-04-14 | Kyocera Corp | Solar cell module |
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