JP5836174B2 - Solar cell module - Google Patents

Solar cell module Download PDF

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JP5836174B2
JP5836174B2 JP2012071858A JP2012071858A JP5836174B2 JP 5836174 B2 JP5836174 B2 JP 5836174B2 JP 2012071858 A JP2012071858 A JP 2012071858A JP 2012071858 A JP2012071858 A JP 2012071858A JP 5836174 B2 JP5836174 B2 JP 5836174B2
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solar cell
cell module
rows
stepped portion
conductor
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JP2013206967A (en
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宮本　慎介
慎介 宮本
真之 中村
真之 中村
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Mitsubishi Electric Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、複数の太陽電池セルを並べて配置した太陽電池モジュールに関する。   The present invention relates to a solar cell module in which a plurality of solar cells are arranged side by side.

従来、複数の太陽電池セルが平面内に並べて配置された太陽電池モジュールが用いられている。太陽電池モジュールは、全体としての平面形状が略方形形状、略三角形形状、略台形形状などを呈するものが知られている。   Conventionally, a solar cell module in which a plurality of solar cells are arranged in a plane is used. As the solar cell module, one having a planar shape as a whole having a substantially square shape, a substantially triangular shape, a substantially trapezoidal shape, or the like is known.

略三角形形状や略台形形状を呈する太陽電池モジュール内の隣り合うセル列の段差部分の配線に関する技術は、特許文献１に開示されている。特許文献１に開示される発明は、セル列の段差部分をクランク状の配線で接続している。   Patent Document 1 discloses a technique related to wiring of step portions of adjacent cell rows in a solar cell module that exhibits a substantially triangular shape or a substantially trapezoidal shape. In the invention disclosed in Patent Document 1, the step portions of the cell rows are connected by crank-shaped wiring.

特許第３７４８３４４号公報Japanese Patent No. 3748344

ここで、略三角形形状や略台形形状を呈する太陽電池モジュールのように、内角の一部が鋭角となっている場合には、方形形状かつ同サイズの太陽電池セルをできる限り隙間を少なくするように並べると、鋭角となっている内角の頂点から延びる一辺に沿って太陽電池セルが配置されない空白部分が生じてしまう。そのため、隣り合うセル列に段差部分が生じ、各セル列間を接続する配線の経路が必然的に長くなり、配線ロスが大きくなってしまう。   Here, when a part of the inner corner is an acute angle like a solar cell module having a substantially triangular shape or a substantially trapezoidal shape, the gap between the rectangular and the same size solar cells should be reduced as much as possible. If they are arranged in a row, a blank portion in which the solar cells are not arranged along one side extending from the apex of the inner angle that is an acute angle is generated. For this reason, a stepped portion is formed between adjacent cell rows, and the route of the wiring connecting the cell rows is inevitably long, resulting in a large wiring loss.

本発明は、上記に鑑みてなされたものであって、隣り合うセル列の段差部でセル列同士の間を接続する配線における配線ロスを低減した太陽電池モジュールを得ることを目的とする。   This invention is made | formed in view of the above, Comprising: It aims at obtaining the solar cell module which reduced the wiring loss in the wiring which connects between cell rows by the level | step-difference part of an adjacent cell row.

上述した課題を解決し、目的を達成するために、本発明は、複数の太陽電池セルを直列に繋いだ太陽電池セル列を複数行に並べて配置し、隣り合う行の前記太陽電池セル列を導線で接続した太陽電池モジュールであって、太陽電池セル列の少なくとも一つの少なくとも一端部は、隣接する行の太陽電池セル列の端部に対して面内でずれて段差部が形成されており、隣り合う行の太陽電池セル列を段差部において接続する導線は、太陽電池セル列中の太陽電池セルの配列方向に延びる部分の断面積が、太陽電池セル列の並び方向に延びる部分の断面積よりも大きいことを特徴とする。   In order to solve the above-described problems and achieve the object, the present invention arranges solar cell columns in which a plurality of solar cells are connected in series in a plurality of rows and arranges the solar cell columns in adjacent rows. A solar cell module connected by a conductive wire, wherein at least one end of at least one of the solar cell columns is shifted in-plane with respect to an end of the solar cell column in an adjacent row to form a stepped portion. The conductive wire connecting the solar cell columns in adjacent rows at the stepped portion is a cross-sectional area of the portion extending in the arrangement direction of the solar cells in the solar cell row, and is cut off in the portion extending in the arrangement direction of the solar cell rows. It is characterized by being larger than the area.

本発明によれば、隣り合う太陽電池セルの列の段差部に配置される導線における損失を抑制できるという効果を奏する。   According to the present invention, there is an effect that it is possible to suppress the loss in the conductive wires arranged in the step portions of the rows of adjacent solar cells.

図１は、本発明にかかる太陽電池モジュールの実施の形態１の構成を示す図である。FIG. 1 is a diagram showing a configuration of a first embodiment of a solar cell module according to the present invention. 図２は、実施の形態１にかかる太陽電池モジュールのセル列の段差部を拡大して示す図である。FIG. 2 is an enlarged view of the stepped portion of the cell row of the solar cell module according to the first embodiment. 図３は、実施の形態２にかかる太陽電池モジュールのセル列の段差部を拡大して示す図である。FIG. 3 is an enlarged view of the stepped portion of the cell row of the solar cell module according to the second embodiment. 図４は、実施の形態３にかかる太陽電池モジュールのセル列の段差部を拡大して示す図である。FIG. 4 is an enlarged view of the stepped portion of the cell row of the solar cell module according to the third embodiment.

以下に、本発明にかかる太陽電池モジュールの実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。   Embodiments of a solar cell module according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

実施の形態１．
図１は、本発明にかかる太陽電池モジュールの実施の形態１の構成を示す図である。太陽電池モジュール１は、平面視において略台形状を呈しており、その平面内には太陽電池セル２を直列に接続したセル列２ａ〜２ｅが複数段に並べて配置されている。太陽電池セル２は、発電効率向上のために、太陽電池モジュール１の平面内にできるだけ隙間が生じないように配置されている。そのため、太陽電池セル２を直列に接続したセル列２ｂ〜２ｅの端部には、平面内に段差部３ａ〜３ｄが生じている。セル列２ａ〜２ｅの内、隣接する列同士は導線６で接続されている。 Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a first embodiment of a solar cell module according to the present invention. The solar cell module 1 has a substantially trapezoidal shape in a plan view, and cell rows 2a to 2e in which solar cells 2 are connected in series are arranged in a plurality of stages in the plane. The solar cells 2 are arranged so that a gap is not generated as much as possible in the plane of the solar cell module 1 in order to improve power generation efficiency. Therefore, step portions 3a to 3d are generated in the plane at the ends of the cell rows 2b to 2e in which the solar cells 2 are connected in series. Of the cell rows 2a to 2e, adjacent rows are connected by a conductive wire 6.

図２は、セル列の段差部を拡大して示す図である。段差部３ａにおいてセル列２ａとセル列２ｂとを接続する導線６は、セル列２ａ、２ｂの配列方向と同じ方向に延びる部分の導体６ａと、セル列２ａ、２ｂの配列方向と直交する方向に延びる部分の導体６ｂとで構成される。導線６は、導体６ａ、６ｂが一体に形成された構造であっても良いし、別々の部材として形成された導体６ａ、６ｂをはんだ付けなどで接合した構造であっても良い。   FIG. 2 is an enlarged view showing the step portion of the cell row. The conductor 6 that connects the cell row 2a and the cell row 2b in the stepped portion 3a has a conductor 6a that extends in the same direction as the arrangement direction of the cell rows 2a and 2b, and a direction orthogonal to the arrangement direction of the cell rows 2a and 2b. It is comprised with the conductor 6b of the part extended in this. The conductor 6 may have a structure in which the conductors 6a and 6b are integrally formed, or may have a structure in which the conductors 6a and 6b formed as separate members are joined by soldering or the like.

段差部３ａが存在しない場合、セル列２ａ、２ｂを接続する導線６は、セル列２ａ、２ｂの配列方向と直交する方向に延びる部分のみで構成できる。したがって、段差部３ａにおいてセル列２ａとセル列２ｂとを接続する導線６のうち、セル列２ａ、２ｂの配列方向と同じ方向に延びる部分の導体６ａは、セル列２ａ、２ｂの端部が揃っている場合と比較して余分に必要となる部分である。   When the step portion 3a does not exist, the conductive wire 6 connecting the cell rows 2a and 2b can be configured only by a portion extending in a direction orthogonal to the arrangement direction of the cell rows 2a and 2b. Therefore, in the conductor 6 that connects the cell row 2a and the cell row 2b in the stepped portion 3a, the portion of the conductor 6a that extends in the same direction as the arrangement direction of the cell rows 2a and 2b is the end of the cell row 2a and 2b. This is an extra part that is necessary compared to the case where it is complete.

本実施の形態においては、導体６ａは、導体６ｂよりも幅広であり、断面積が大きくなっている。このため、導体６ａを設けることによる電気抵抗の増加は小さく抑えられている。導体６ａのみ幅を広くすることにより、太陽電池モジュール１の自体のサイズが大型化することは抑えられる。   In the present embodiment, the conductor 6a is wider than the conductor 6b and has a larger cross-sectional area. For this reason, an increase in electrical resistance due to the provision of the conductor 6a is suppressed to a small level. By increasing the width of only the conductor 6a, the size of the solar cell module 1 itself can be suppressed from increasing.

なお、導体６ａは、幅だけでなく厚さを増加させることによって導体６ｂよりも断面積を大きくすることも可能である。   The conductor 6a can have a larger cross-sectional area than the conductor 6b by increasing not only the width but also the thickness.

段差部３ｂ〜３ｄにおいて隣接するセル列２ｂ〜２ｅを接続する導線６についても同様の構造となっている。   The conductive wire 6 connecting the adjacent cell rows 2b to 2e in the step portions 3b to 3d has a similar structure.

本実施の形態によれば、セル列の段差部に配置される導線は、セル列の配列方向と同じ方向に延びる部分は、セル列の配列方向と直交する方向に延びる部分よりも断面積が大きく、電気抵抗が小さい。これにより、セル列の段差部に配置される導線における損失を抑制できる。すなわち、太陽電池モジュールにおいて消費されるエネルギーを低減できる。   According to the present embodiment, the conductors arranged in the step portions of the cell rows have a cross-sectional area that is greater in the portion extending in the same direction as the cell row arrangement direction than in the portion extending in the direction perpendicular to the cell row arrangement direction. Large and low electrical resistance. Thereby, the loss in the conducting wire arrange | positioned at the level | step-difference part of a cell row | line can be suppressed. That is, the energy consumed in the solar cell module can be reduced.

実施の形態２．
図３は、実施の形態２にかかる太陽電池モジュールのセル列の段差部を拡大して示す図である。段差部３ａにおいてセル列２ａ、２ｂを接続する導線６のうち、セル列２ａ、２ｂの配列方向と同じ方向に延びる部分は、導体６ａ１及び導体６ａ２による並列接続となっている。導線６は、導体６ａ１、６ａ２、及び６ｂが一体に形成された構造であっても良いし、別々の部材として形成された導体６ａ１、６ａ２、及び６ｂをはんだ付けなどで接合した構造であっても良い。 Embodiment 2. FIG.
FIG. 3 is an enlarged view of the stepped portion of the cell row of the solar cell module according to the second embodiment. In the lead 6 connected cell columns 2a, 2b in the step portion 3a, the portion extending in the same direction as the arrangement direction of the cell row 2a, 2b has a parallel connection by conductors 6a 1 and the conductor 6a 2. Wire 6, the conductor 6a 1, 6a 2, and 6b may be a structure formed integrally, separate conductor 6a formed as a member 1, 6a 2, and 6b are joined by soldering or the like It may be a structure.

導体６ａ１、６ａ２の各々の幅は導体６ｂと同じである。すなわち、導体６ａ１、６ａ２が並列に接続された部分での導線６の断面積は、導体６ｂの部分の２倍となっている。なお、導体６ａ１の断面積と導体６ａ２の断面積との和が導体６ｂの断面積以上であれば良く、導体６ａ１、６ａ２の各々の幅は、必ずしも導体６ｂと同じで無くても良い。 The width of each of the conductors 6a 1 and 6a 2 is the same as that of the conductor 6b. That is, the cross-sectional area of the conductor 6 at the portion where the conductors 6a 1 and 6a 2 are connected in parallel is twice that of the conductor 6b. The sum of the cross-sectional area of the conductor 6a 1 and the cross-sectional area of the conductor 6a 2 may be equal to or larger than the cross-sectional area of the conductor 6b. The widths of the conductors 6a 1 and 6a 2 are not necessarily the same as the conductor 6b. Also good.

段差部３ｂ〜３ｄにおいて隣接するセル列２ｂ〜２ｅを接続する導線６についても同様の構造となっている。   The conductive wire 6 connecting the adjacent cell rows 2b to 2e in the step portions 3b to 3d has a similar structure.

なお、ここでは、セル列の配列方向と同じ方向に延びる部分が、２本の導体の並列接続によって構成される場合を例としたが、３本以上の導体が並列接続された構成であっても構わない。   In this example, the portion extending in the same direction as the arrangement direction of the cell rows is configured by parallel connection of two conductors, but the configuration is such that three or more conductors are connected in parallel. It doesn't matter.

本実施の形態によれば、セル列の段差部においてセル列の配列方向と同じ方向に延びる部分は導体が並列に配置されているため、電気抵抗が小さい。これにより、セル列の段差部に配置される導線における損失を抑制できる。   According to the present embodiment, since the conductors are arranged in parallel in the portion extending in the same direction as the cell row arrangement direction in the step portion of the cell row, the electric resistance is small. Thereby, the loss in the conducting wire arrange | positioned at the level | step-difference part of a cell row | line can be suppressed.

実施の形態３．
図４は、実施の形態３にかかる太陽電池モジュールのセル列の段差部を拡大して示す図である。段差部３ａにおいてセル列２ａ、２ｂを接続する導線６は、段差部３ａ全体に広がる形状（略三角形形状）の導体６ｃを含んでおり、導体６ｃの断面積はセル列２ａ、２ｂの配列方向の直交する方向に延びる導体６ｂよりも大きくなっている。導線６は、導体６ｂ、６ｃが一体に形成された構造であっても良いし、別々の部材として形成された導体６ａ、６ｃをはんだ付けなどで接合した構造であっても良い。 Embodiment 3 FIG.
FIG. 4 is an enlarged view of the stepped portion of the cell row of the solar cell module according to the third embodiment. The conductor 6 connecting the cell rows 2a and 2b in the stepped portion 3a includes a conductor 6c having a shape (substantially triangular) extending over the entire stepped portion 3a, and the cross-sectional area of the conductor 6c is the arrangement direction of the cell rows 2a and 2b. It is larger than the conductor 6b extending in the orthogonal direction. The conductor 6 may have a structure in which the conductors 6b and 6c are integrally formed, or may have a structure in which the conductors 6a and 6c formed as separate members are joined by soldering or the like.

セル列の段差部３ａは、太陽電池セル２を配置できないデッドスペースであるため、段差部３ａ全体に広がる略三角形形状の導体６ｃを配置しても、太陽電池セル２の配置の妨げとはならない。導体６ｃは、太陽電池セル２と同色とすることにより、太陽電池セル２が配置されている部分と配置されない部分（段差部）との外見上の差異を小さくし、太陽電池モジュール１の意匠性を高めることができる。   Since the stepped portion 3a of the cell row is a dead space where the solar battery cell 2 cannot be disposed, even if the substantially triangular conductor 6c extending over the entire stepped portion 3a is disposed, the placement of the solar battery cell 2 is not hindered. . By making the conductor 6c the same color as the solar battery cell 2, the difference in appearance between the part where the solar battery cell 2 is arranged and the part where the solar battery cell 2 is not arranged (stepped part) is reduced. Can be increased.

なお、上記各実施の形態においては、略台形形状の太陽電池モジュールを例としたが、平面視の外形形状において内角に鋭角を含まなくても、隣接するセル列に段差部が生じるのであれば、同様の実施が可能である。例えば、六角形形状の太陽電池モジュールは、全ての内角が鈍角であるが、矩形の太陽電池セルをできるだけ隙間無く敷き詰めると、段差部が生じる。このため、段差部に設ける導線を上記各実施の形態と同様の構造とすることにより、段差部に配置される導線における損失を抑制できる。   In each of the above embodiments, the solar cell module having a substantially trapezoidal shape is taken as an example. However, even if the inner shape does not include an acute angle in the outer shape in plan view, a stepped portion is generated in an adjacent cell row. A similar implementation is possible. For example, in a hexagonal solar cell module, all internal angles are obtuse, but when rectangular solar cells are spread as much as possible, a stepped portion is generated. For this reason, the loss in the conducting wire arrange | positioned at a level | step-difference part can be suppressed by making the conducting wire provided in a level | step-difference part the same structure as said each embodiment.

また、段差部におけるずれ量は、１セル分に限定されることはない。例えば、太陽電池モジュールが二等辺三角形形状であり、底辺と平行に太陽電池セルを配列する場合には、底角の対辺に沿って形成されるずれ量が太陽電池セル１／２分の段差部が形成され、底辺から１段離れるごとに太陽電池セルの数が１減少する構造とすることも可能である。   Further, the amount of deviation in the stepped portion is not limited to one cell. For example, when the solar cell module has an isosceles triangle shape and solar cells are arranged in parallel with the bottom side, the amount of deviation formed along the opposite side of the base angle is a step portion corresponding to 1/2 of the solar cells. It is also possible to have a structure in which the number of solar cells is reduced by 1 every time one step away from the bottom.

以上のように、本発明にかかる太陽電池モジュールは、複数の太陽電池セルを複数列・複数段に並べて配置する太陽電池モジュールの中で、非矩形の平面形状の太陽電池モジュールに適している。   As described above, the solar cell module according to the present invention is suitable for a non-rectangular planar solar cell module among solar cell modules in which a plurality of solar cells are arranged in a plurality of rows and stages.

１ 太陽電池モジュール
２ 太陽電池セル
２ａ〜２ｅ セル列
３ａ〜３ｄ 段差部
６ 導線
６ａ、６ａ１、６ａ２、６ｂ、６ｃ 導体 1 the solar cell module 2 solar cell 2a~2e cell row 3a~3d stepped portion 6 wires 6a, 6a 1, 6a 2, 6b, 6c conductor

Claims (3)

複数の太陽電池セルを直列に繋いだ太陽電池セル列を複数行に並べて配置し、隣り合う行の前記太陽電池セル列を導線で接続した太陽電池モジュールであって、
前記太陽電池セル列の少なくとも一つの少なくとも一端部は、隣接する行の前記太陽電池セル列の端部に対して面内でずれて段差部が形成されており、
隣り合う行の太陽電池セル列を前記段差部において接続する前記導線は、前記太陽電池セル列の並び方向に延びる第１の導線と前記段差部全体に広がる三角形形状の第２の導線とを備えた形状であり、
前記第２の導線の断面積が、前記第１の導線の断面積よりも大きいことを特徴とする太陽電池モジュール。 A solar cell module in which a plurality of solar cells connected in series are arranged in a plurality of rows, and the solar cell columns in adjacent rows are connected by conductive wires,
At least one end portion of at least one of the solar cell columns is formed with a stepped portion shifted in-plane with respect to an end portion of the solar cell column in an adjacent row,
The conducting wire connecting adjacent rows of photovoltaic cell columns at the stepped portion includes a first conducting wire extending in the arrangement direction of the photovoltaic cell rows and a triangular second conducting wire extending over the entire stepped portion. Shape
Solar cell module cross-sectional area of the second conductors, and wherein the larger Ri by cross - sectional area of the first wire. 前記第２の導線は、前記太陽電池セルと同色としたことを特徴とする請求項１に記載の太陽電池モジュール。  The solar cell module according to claim 1, wherein the second conductive wire has the same color as the solar cell. 平面視の外形形状が非矩形の多角形であり、該非矩形の多角形の一辺に沿って前記段差部が形成されたことを特徴とする請求項１又は２に記載の太陽電池モジュール。 3. The solar cell module according to claim 1, wherein the outer shape in plan view is a non-rectangular polygon, and the stepped portion is formed along one side of the non-rectangular polygon.
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