JP2018046112A

JP2018046112A - Solar cell module

Info

Publication number: JP2018046112A
Application number: JP2016178915A
Authority: JP
Inventors: 信也津村; Shinya Tsumura; 優也中村; Yuya Nakamura; 朗通前川; Akimichi Maekawa; 淳平入川; Jumpei Irikawa
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2016-09-13
Filing date: 2016-09-13
Publication date: 2018-03-22

Abstract

【課題】太陽電池モジュールの製造の複雑化を抑制しながら、太陽電池モジュールの出力効率を向上させる技術を提供する。【解決手段】第１２太陽電池セル１０ａｂと第１３太陽電池セル１０ａｃは、隣接して配置される。複数の第１種配線材１４は、第１２太陽電池セル１０ａｂから第１３太陽電池セル１０ａｃに延びて、隣接する第１２太陽電池セル１０ａｂと第１３太陽電池セル１０ａｃとを電気的に接続する。導電材５０は、隣接する第１２太陽電池セル１０ａｂと第１３太陽電池セル１０ａｃとの間において、複数の第１種配線材１４を電気的に接続する。【選択図】図４Provided is a technique for improving the output efficiency of a solar cell module while suppressing the complexity of manufacturing the solar cell module. A twelfth solar cell 10ab and a thirteenth solar cell 10ac are arranged adjacent to each other. The plurality of first-type wiring members 14 extend from the twelfth solar cell 10ab to the thirteenth solar cell 10ac, and electrically connect the adjacent twelfth solar cell 10ab and the thirteenth solar cell 10ac. The conductive material 50 electrically connects the plurality of first-type wiring members 14 between the adjacent twelfth solar cell 10ab and thirteenth solar cell 10ac. [Selection] Figure 4

Description

本発明は、太陽電池モジュールに関し、特に複数の太陽電池セルを含む太陽電池モジュールに関する。 The present invention relates to a solar cell module, and more particularly to a solar cell module including a plurality of solar cells.

太陽電池モジュールでは、複数の太陽電池セルが２枚の封止部材により上下方向から封止される。２枚の封止部材のそれぞれには、各太陽電池セルを配置すべき位置に導電部が形成される。複数の太陽電池セルを２枚の封止部材で封止する場合、隣接した２つの太陽電池セルのそれぞれに対応した導電部は導電性接続部を介して接続される（例えば、特許文献１参照）。 In the solar cell module, a plurality of solar cells are sealed from above and below by two sealing members. In each of the two sealing members, a conductive portion is formed at a position where each solar battery cell is to be disposed. When sealing a plurality of solar cells with two sealing members, the conductive portions corresponding to the two adjacent solar cells are connected via a conductive connection portion (see, for example, Patent Document 1). ).

国際公開第１５／１３３６３２号パンフレットInternational Publication No. 15/133632 Pamphlet

太陽電池モジュールの製造を簡易にするために、２つの透明部材が複数のワイヤによって接続されたワイヤフィルムを使用することがある。ワイヤフィルムを太陽電池モジュールに使用する場合、２つの透明部材のそれぞれが隣接の太陽電池セルに貼り付けられ、ワイヤが配線材として使用される。このような構成において、ワイヤの存在によって太陽電池セルに入射される太陽光の一部が遮光される。遮光される太陽光を低減するために、細いワイヤの使用が望まれる。一方、太陽電池セルから収集される発電量が面内において均一でない場合がある。発電量が面内において均一でない場合、複数のワイヤを流れる電流も均一でなくなる。電流が大きくなるワイヤが細ければ、太陽電池モジュールの出力の効率が低下する。 In order to simplify the manufacture of the solar cell module, a wire film in which two transparent members are connected by a plurality of wires may be used. When using a wire film for a solar cell module, each of two transparent members is affixed on an adjacent solar cell, and a wire is used as a wiring material. In such a configuration, a part of sunlight incident on the solar battery cell is shielded by the presence of the wire. In order to reduce sunlight that is shielded from light, the use of thin wires is desired. On the other hand, the power generation amount collected from the solar cells may not be uniform in the plane. When the power generation amount is not uniform in the plane, the current flowing through the plurality of wires is not uniform. If the wire for increasing the current is thin, the output efficiency of the solar cell module is lowered.

本発明はこうした状況に鑑みてなされたものであり、その目的は、太陽電池モジュールの製造の複雑化を抑制しながら、太陽電池モジュールの出力効率を向上させる技術を提供することにある。 This invention is made | formed in view of such a condition, The objective is to provide the technique which improves the output efficiency of a solar cell module, suppressing the complexity of manufacture of a solar cell module.

上記課題を解決するために、本発明のある態様の太陽電池モジュールは、複数の太陽電池セルと、隣接する太陽電池セルの一方から他方に延びて、隣接する太陽電池セルを電気的に接続する複数の配線材と、隣接する太陽電池セルの一方と他方との間において、複数の配線材を電気的に接続する導電材と、を備える。 In order to solve the above-described problem, a solar battery module according to an aspect of the present invention extends from one of a plurality of adjacent solar battery cells to the other and electrically connects the adjacent solar battery cells. A plurality of wiring materials and a conductive material that electrically connects the plurality of wiring materials between one and the other of the adjacent solar cells.

本発明によれば、太陽電池モジュールの製造の複雑化を抑制しながら、太陽電池モジュールの出力効率を向上できる。 ADVANTAGE OF THE INVENTION According to this invention, the output efficiency of a solar cell module can be improved, suppressing complication of manufacture of a solar cell module.

本発明の実施例１に係る太陽電池モジュールの構造を示す平面図である。It is a top view which shows the structure of the solar cell module which concerns on Example 1 of this invention. 図１の太陽電池モジュールの構造を示す断面図である。It is sectional drawing which shows the structure of the solar cell module of FIG. 図１の太陽電池モジュールにおいて使用される樹脂シートの斜視図である。It is a perspective view of the resin sheet used in the solar cell module of FIG. 図４（ａ）−（ｂ）は、図１のストリングの部分構造を示す図である。4 (a)-(b) are diagrams showing a partial structure of the string of FIG. 図５（ａ）−（ｂ）は、本発明の実施例２に係るストリングの部分構造を示す図である。FIGS. 5A to 5B are diagrams showing a partial structure of a string according to the second embodiment of the present invention.

（実施例１）
本発明を具体的に説明する前に、概要を述べる。本発明の実施例１は、複数の太陽電池セルがマトリックス状に配置された太陽電池モジュールに関する。太陽電池モジュールでは、第１保護部材と第２保護部材との間に封止部材が配置され、封止部材によって複数の太陽電池セルが封止される。その際、隣接した２つの太陽電池セルは、ワイヤフィルムによって接続される。ワイヤフィルムは、前述のごとく、２つの透明部材が複数のワイヤによって接続されており、各透明部材が太陽電池セルに貼り付けられる。ワイヤが配線材の役割を有するので、ワイヤが延びる方向に配置された複数の太陽電池セルを複数のワイヤフィルムで接続することによってストリングが形成される。このようなワイヤフィルムは、太陽電池モジュールの製造を簡易にするために使用される。一方、このようなストリングでは、太陽電池セルと透明部材との間にワイヤが配置される。ワイヤは、太陽電池セルに入射される太陽光の一部を遮光する。ワイヤによって遮光される太陽光は少ない方が好ましい。そのため、細いワイヤの使用が望まれる。 Example 1
Before describing the present invention in detail, an outline will be described. Example 1 of the present invention relates to a solar cell module in which a plurality of solar cells are arranged in a matrix. In the solar cell module, a sealing member is disposed between the first protective member and the second protective member, and the plurality of solar cells are sealed by the sealing member. In that case, two adjacent photovoltaic cells are connected by a wire film. As described above, in the wire film, two transparent members are connected by a plurality of wires, and each transparent member is attached to the solar battery cell. Since a wire has a role of a wiring member, a string is formed by connecting a plurality of solar cells arranged in a direction in which the wire extends with a plurality of wire films. Such a wire film is used to simplify the production of the solar cell module. On the other hand, in such a string, a wire is arrange | positioned between a photovoltaic cell and a transparent member. The wire shields a part of sunlight incident on the solar battery cell. Less sunlight is shielded by the wire. Therefore, the use of a thin wire is desired.

太陽電池セルから収集される発電量が面内において均一でない場合、複数のワイヤを流れる電流も均一でなくなる。特に、細いワイヤに流れる電流が大きくなると、当該ワイヤが抵抗となって、太陽電池モジュールの出力の効率が低下する。そのため、配線材として細いワイヤを使用する場合であっても、各ワイヤに流れる電流を均一に近づけることが望まれる。本実施例では、隣接した２つの太陽電池セルの間に配置される複数のワイヤを導電材によって電気的に接続する。なお、以下の説明において、「平行」、「垂直」は、完全な平行、垂直だけではなく、誤差の範囲で平行、垂直からずれている場合も含むものとする。また、「略」は、おおよその範囲で同一であるという意味である。 When the power generation amount collected from the solar battery cells is not uniform in the plane, the current flowing through the plurality of wires is not uniform. In particular, when the current flowing through the thin wire increases, the wire becomes a resistance, and the output efficiency of the solar cell module decreases. Therefore, even when a thin wire is used as the wiring material, it is desirable to make the current flowing through each wire uniform. In a present Example, the some wire arrange | positioned between two adjacent photovoltaic cells is electrically connected by a electrically conductive material. In the following description, “parallel” and “vertical” include not only perfect parallel and vertical, but also include cases in which they deviate from parallel and vertical within an error range. Further, “substantially” means that they are the same in an approximate range.

図１は、本発明の実施例１に係る太陽電池モジュール１００の構造を示す平面図である。図１に示すように、ｘ軸、ｙ軸、ｚ軸からなる直角座標系が規定される。ｘ軸、ｙ軸は、太陽電池モジュール１００の平面内において互いに直交する。ｚ軸は、ｘ軸およびｙ軸に垂直であり、太陽電池モジュール１００の厚み方向に延びる。また、ｘ軸、ｙ軸、ｚ軸のそれぞれの正の方向は、図１における矢印の方向に規定され、負の方向は、矢印と逆向きの方向に規定される。太陽電池モジュール１００を形成する２つの主表面であって、かつｘ−ｙ平面に平行な２つの主表面のうち、ｚ軸の正方向側に配置される主平面が受光面であり、ｚ軸の負方向側に配置される主平面が裏面である。以下では、ｚ軸の正方向側を「受光面側」とよび、ｚ軸の負方向側を「裏面側」とよぶ。そのため、図１は、太陽電池モジュール１００の受光面側からの平面図であるといえる。 FIG. 1 is a plan view showing the structure of a solar cell module 100 according to Embodiment 1 of the present invention. As shown in FIG. 1, a rectangular coordinate system composed of an x-axis, a y-axis, and a z-axis is defined. The x axis and the y axis are orthogonal to each other in the plane of the solar cell module 100. The z axis is perpendicular to the x axis and the y axis and extends in the thickness direction of the solar cell module 100. Further, the positive directions of the x-axis, y-axis, and z-axis are each defined in the direction of the arrow in FIG. 1, and the negative direction is defined in the direction opposite to the arrow. Of the two main surfaces forming the solar cell module 100 and parallel to the xy plane, the main plane arranged on the positive side of the z axis is the light receiving surface, and the z axis The main plane arranged on the negative direction side is the back surface. Hereinafter, the positive direction side of the z-axis is referred to as “light-receiving surface side”, and the negative direction side of the z-axis is referred to as “back surface side”. Therefore, FIG. 1 can be said to be a plan view from the light receiving surface side of the solar cell module 100.

太陽電池モジュール１００は、太陽電池セル１０と総称される第１１太陽電池セル１０ａａ、・・・、第４６太陽電池セル１０ｄｆ、第１種配線材１４、第２種配線材１６、第３種配線材１８、フレーム２０と総称される第１フレーム２０ａ、第２フレーム２０ｂ、第３フレーム２０ｃ、第４フレーム２０ｄを含む。 The solar cell module 100 includes eleventh solar cells 10aa,..., 46th solar cell 10df, first type wiring material 14, second type wiring material 16, third type wiring, which are collectively referred to as the solar cell 10. The first frame 20a, the second frame 20b, the third frame 20c, and the fourth frame 20d, which are collectively referred to as the material 18 and the frame 20, are included.

第１フレーム２０ａは、ｘ軸方向に延び、第２フレーム２０ｂは、第１フレーム２０ａのｘ軸の正方向側端からｙ軸の負方向に延びる。また、第３フレーム２０ｃは、第２フレーム２０ｂのｙ軸の負方向側端からｘ軸の負方向に延び、第４フレーム２０ｄは、第３フレーム２０ｃのｘ軸の負方向側端と第１フレーム２０ａのｘ軸の負方向側端とを結ぶ。フレーム２０は、太陽電池モジュール１００の外周を囲んでおり、アルミニウム等の金属で形成される。ここで、第１フレーム２０ａ、第３フレーム２０ｃは、第２フレーム２０ｂ、第４フレーム２０ｄよりも長いので、太陽電池モジュール１００は、ｙ軸方向よりもｘ軸方向に長い矩形状を有する。 The first frame 20a extends in the x-axis direction, and the second frame 20b extends in the negative direction of the y-axis from the x-axis positive side end of the first frame 20a. The third frame 20c extends in the negative direction of the x axis from the negative end of the second frame 20b in the negative direction of the x axis, and the fourth frame 20d extends from the negative end of the third frame 20c in the negative direction of the negative direction of the x axis. The frame 20a is connected to the x-axis negative side end. The frame 20 surrounds the outer periphery of the solar cell module 100 and is formed of a metal such as aluminum. Here, since the first frame 20a and the third frame 20c are longer than the second frame 20b and the fourth frame 20d, the solar cell module 100 has a rectangular shape that is longer in the x-axis direction than in the y-axis direction.

複数の太陽電池セル１０のそれぞれは、入射する光を吸収して光起電力を発生する。特に、太陽電池セル１０は、受光面において吸収した光から起電力を発生するとともに、裏面において吸収した光からも光起電力を発生する。太陽電池セル１０は、例えば、結晶系シリコン、ガリウム砒素（ＧａＡｓ）またはインジウム燐（ＩｎＰ）等の半導体材料によって形成される。太陽電池セル１０の構造は、特に限定されないが、ここでは、一例として、結晶シリコンとアモルファスシリコンとが積層されているとする。また、太陽電池セル１０は、ｘ−ｙ平面において、四角形の形状を有するが、その他の形状、例えば、八角形の形状を有してもよい。図１では省略しているが、各太陽電池セル１０の受光面および裏面には、互いに平行にｙ軸方向に延びる複数のフィンガー電極が備えられる。 Each of the plurality of solar cells 10 absorbs incident light and generates photovoltaic power. In particular, the solar cell 10 generates an electromotive force from the light absorbed on the light receiving surface and also generates a photoelectromotive force from the light absorbed on the back surface. The solar battery cell 10 is made of, for example, a semiconductor material such as crystalline silicon, gallium arsenide (GaAs), or indium phosphorus (InP). The structure of the solar battery cell 10 is not particularly limited, but here, as an example, it is assumed that crystalline silicon and amorphous silicon are stacked. In addition, the solar battery cell 10 has a quadrangular shape in the xy plane, but may have another shape, for example, an octagonal shape. Although omitted in FIG. 1, a plurality of finger electrodes extending in the y-axis direction are provided in parallel to each other on the light receiving surface and the back surface of each solar battery cell 10.

複数の太陽電池セル１０は、ｘ−ｙ平面上にマトリックス状に配列される。ここでは、ｘ軸方向に６つの太陽電池セル１０が並べられる。ｘ軸方向に並んで配置される６つの太陽電池セル１０は、第１種配線材１４によって直列に接続され、１つのストリング１２が形成される。例えば、第１１太陽電池セル１０ａａ、第１２太陽電池セル１０ａｂ、・・・、第１６太陽電池セル１０ａｆが接続されることによって、第１ストリング１２ａが形成される。また、第２ストリング１２ｂから第４ストリング１２ｄも同様に形成される。その結果、４つのストリング１２がｙ軸方向に平行に並べられる。このように、ｘ軸方向に並べられる太陽電池セル１０の数は、ｙ軸方向に並べられる太陽電池セル１０の数よりも多い。ｘ軸方向を「第１方向」とよぶ場合、ｙ軸方向は「第２方向」とよばれる。なお、ストリング１２に含まれる太陽電池セル１０の数は「６」に限定されず、ストリング１２の数は「４」に限定されない。 The plurality of solar battery cells 10 are arranged in a matrix on the xy plane. Here, six solar cells 10 are arranged in the x-axis direction. The six photovoltaic cells 10 arranged side by side in the x-axis direction are connected in series by the first-type wiring material 14 to form one string 12. For example, the first string 12a is formed by connecting the eleventh solar battery cell 10aa, the twelfth solar battery cell 10ab, ..., the sixteenth solar battery cell 10af. The second string 12b to the fourth string 12d are formed in the same manner. As a result, the four strings 12 are arranged in parallel in the y-axis direction. Thus, the number of the photovoltaic cells 10 arranged in the x-axis direction is larger than the number of the photovoltaic cells 10 arranged in the y-axis direction. When the x-axis direction is called “first direction”, the y-axis direction is called “second direction”. In addition, the number of the photovoltaic cells 10 included in the string 12 is not limited to “6”, and the number of the strings 12 is not limited to “4”.

ストリング１２を形成するために、第１種配線材１４は、ｘ軸方向に隣接した太陽電池セル１０のうちの一方の受光面側のフィンガー電極と、他方の裏面側のフィンガー電極とを接続する。例えば、隣接した第１１太陽電池セル１０ａａと第１２太陽電池セル１０ａｂとを接続するための５つの第１種配線材１４は、第１１太陽電池セル１０ａａの裏面側のフィンガー電極と第１２太陽電池セル１０ａｂの受光面側のフィンガー電極とを電気的に接続する。なお、第１種配線材１４の数は「５」に限定されない。第１種配線材１４は、前述のワイヤに相当する。第１種配線材１４と太陽電池セル１０との接続については後述する。 In order to form the string 12, the first type wiring member 14 connects the finger electrode on one light receiving surface side of the photovoltaic cells 10 adjacent in the x-axis direction and the finger electrode on the other back surface side. . For example, the five first-type wiring members 14 for connecting the adjacent eleventh solar cells 10aa and the twelfth solar cells 10ab are the finger electrodes on the back surface side of the eleventh solar cells 10aa and the twelfth solar cells. The finger electrode on the light receiving surface side of the cell 10ab is electrically connected. The number of first-type wiring members 14 is not limited to “5”. The first type wiring member 14 corresponds to the above-described wire. The connection between the first type wiring member 14 and the solar battery cell 10 will be described later.

第２種配線材１６は、ｙ軸方向に延びて、互いに隣接する２つのストリング１２を電気的に接続する。例えば、第１ストリング１２ａのｘ軸の正方向側端に位置する第１６太陽電池セル１０ａｆと、第２ストリング１２ｂのｘ軸の正方向側端に位置する第２６太陽電池セル１０ｂｆは、第２種配線材１６によって電気的に接続される。さらに、第２ストリング１２ｂと第３ストリング１２ｃは、ｘ軸の負方向側において第２種配線材１６によって電気的に接続されるとともに、第３ストリング１２ｃと第４ストリング１２ｄは、ｘ軸の正方向側において第２種配線材１６によって電気的に接続される。その結果、複数のストリング１２は、第２種配線材１６によって直列に接続される。 The second type wiring member 16 extends in the y-axis direction and electrically connects two strings 12 adjacent to each other. For example, the sixteenth solar cell 10af located at the positive x-direction end of the first string 12a and the twenty-sixth solar cell 10bf located at the positive x-direction end of the second string 12b are the second Electrical connection is made by the seed wiring member 16. Further, the second string 12b and the third string 12c are electrically connected by the second-type wiring member 16 on the negative direction side of the x axis, and the third string 12c and the fourth string 12d are positive of the x axis. Electrical connection is established by the second-type wiring material 16 on the direction side. As a result, the plurality of strings 12 are connected in series by the second type wiring material 16.

第１ストリング１２ａのｘ軸の負方向側端における第１１太陽電池セル１０ａａには、第２種配線材１６が接続されておらず、その代わりに第３種配線材１８が接続される。第３種配線材１８には、図示しない取出し配線材が接続される。取出し配線材は、複数の太陽電池セル１０において発電した電力を太陽電池モジュール１００外に取り出すための配線材である。なお、第３種配線材１８は、第４ストリング１２ｄのｘ軸の負方向側端における第４１太陽電池セル１０ｄａにも接続される。 The second type wiring member 16 is not connected to the eleventh solar cell 10aa at the negative end of the first string 12a in the x-axis direction, and the third type wiring member 18 is connected instead. An extraction wiring material (not shown) is connected to the third type wiring material 18. The extraction wiring material is a wiring material for extracting the electric power generated in the plurality of solar cells 10 to the outside of the solar cell module 100. The third-type wiring member 18 is also connected to the forty-first solar cell 10da at the end of the fourth string 12d on the negative side of the x axis.

図２は、太陽電池モジュール１００の構造を示すｘ軸に沿った断面図であり、図１のＡ−Ａ’断面図である。太陽電池モジュール１００は、第１２太陽電池セル１０ａｂ、第１３太陽電池セル１０ａｃ、第１種配線材１４、第１保護部材３０、第１封止部材３２、第２封止部材３４、第２保護部材３６、第１透明部材４０、第２透明部材４２、第１接着剤４４、第２接着剤４６、導電材５０、光反射部材５２を含む。図２の上側が受光面側に相当し、下側が裏面側に相当する。 2 is a cross-sectional view taken along the x-axis showing the structure of the solar cell module 100, and is a cross-sectional view taken along the line A-A 'of FIG. The solar cell module 100 includes a twelfth solar cell 10ab, a thirteenth solar cell 10ac, a first type wiring member 14, a first protection member 30, a first sealing member 32, a second sealing member 34, and a second protection. The member 36, the 1st transparent member 40, the 2nd transparent member 42, the 1st adhesive agent 44, the 2nd adhesive agent 46, the electrically conductive material 50, and the light reflection member 52 are included. The upper side of FIG. 2 corresponds to the light receiving surface side, and the lower side corresponds to the back surface side.

第１保護部材３０は、太陽電池モジュール１００の受光面側に配置されており、太陽電池モジュール１００の表面を保護する。また、太陽電池モジュール１００は、ｘ−ｙ平面において、フレーム２０に囲まれるような矩形状を有する。第１保護部材３０には、透光性および遮水性を有するガラス、透光性プラスチック等が使用される。第１保護部材３０によって太陽電池モジュール１００の機械的強度が高くされる。 The first protection member 30 is disposed on the light receiving surface side of the solar cell module 100 and protects the surface of the solar cell module 100. The solar cell module 100 has a rectangular shape surrounded by the frame 20 in the xy plane. The first protective member 30 is made of light-transmitting and water-blocking glass, light-transmitting plastic, or the like. The first protective member 30 increases the mechanical strength of the solar cell module 100.

第１封止部材３２は、第１保護部材３０の裏面側に積層される。第１封止部材３２は、第１保護部材３０と太陽電池セル１０との間に配置されて、これらを接着する。第１封止部材３２として、例えば、ポリオレフィン、ＥＶＡ（エチレン酢酸ビニル共重合体）、ＰＶＢ（ポリビニルブチラール）、ポリイミド等の樹脂フィルムのような、第１保護部材３０および第２保護部材３６よりも軟化温度が低い熱可塑性樹脂が使用される。なお、熱硬化性樹脂が使用されてもよい。第１封止部材３２は、透光性を有するとともに、第１保護部材３０におけるｘ−ｙ平面と略同一寸法の面を有するシート材によって形成される。 The first sealing member 32 is stacked on the back side of the first protection member 30. The 1st sealing member 32 is arrange | positioned between the 1st protection member 30 and the photovoltaic cell 10, and adhere | attaches these. As the first sealing member 32, for example, a resin film such as polyolefin, EVA (ethylene vinyl acetate copolymer), PVB (polyvinyl butyral), polyimide, or the like, rather than the first protective member 30 and the second protective member 36. A thermoplastic resin having a low softening temperature is used. A thermosetting resin may be used. The first sealing member 32 is formed of a sheet material having translucency and having a surface having substantially the same dimensions as the xy plane in the first protection member 30.

第１２太陽電池セル１０ａｂ、第１３太陽電池セル１０ａｃは、第１保護部材３０の裏面側に積層される。各太陽電池セル１０は、ｚ軸の正方向側に受光面２２を向け、ｚ軸の負方向側に裏面２４を向けて配置される。受光面２２を「第１面」とよぶ場合、裏面２４は「第２面」とよばれる。太陽電池セル１０の受光面２２には、第１種配線材１４、第１接着剤４４、第１透明部材４０が配置され、太陽電池セル１０の裏面２４には、第１種配線材１４、第２接着剤４６、第２透明部材４２が配置される。ここでは、太陽電池セル１０に対するこれらの配置を説明するために、図３を使用する。 The twelfth solar cell 10ab and the thirteenth solar cell 10ac are stacked on the back surface side of the first protection member 30. Each photovoltaic cell 10 is arranged with the light receiving surface 22 facing the positive direction side of the z-axis and the back surface 24 facing the negative direction side of the z-axis. When the light receiving surface 22 is referred to as a “first surface”, the back surface 24 is referred to as a “second surface”. The first type wiring member 14, the first adhesive 44, and the first transparent member 40 are disposed on the light receiving surface 22 of the solar battery cell 10, and the first type wiring member 14, A second adhesive 46 and a second transparent member 42 are disposed. Here, FIG. 3 is used in order to explain these arrangements with respect to the solar battery cell 10.

図３は、太陽電池モジュール１００において使用される樹脂シート８０の斜視図である。樹脂シート８０は、第１種配線材１４、第１透明部材４０、第２透明部材４２、第１接着剤４４、第２接着剤４６、導電材５０、光反射部材５２を含む。樹脂シート８０は前述のワイヤフィルムに相当する。 FIG. 3 is a perspective view of a resin sheet 80 used in the solar cell module 100. The resin sheet 80 includes the first type wiring member 14, the first transparent member 40, the second transparent member 42, the first adhesive 44, the second adhesive 46, the conductive material 50, and the light reflecting member 52. The resin sheet 80 corresponds to the aforementioned wire film.

第１透明部材４０は、隣接した２つの太陽電池セル１０の一方、例えば、第１３太陽電池セル１０ａｃの受光面２２側に配置される。第１透明部材４０は、例えば、ＰＥＴ（ポリエチレンテレフタラート）等の第１封止部材３２および第２封止部材３４よりも軟化温度が高い透明な樹脂フィルムで構成される。第１透明部材４０は、ｘ−ｙ平面において、太陽電池セル１０と同等サイズの四角形の形状を有する。第１透明部材４０における第１３太陽電池セル１０ａｃ側の面には第１接着剤４４が配置され、第１接着剤４４には複数の第１種配線材１４が配置される。第１接着剤４４は、第１３太陽電池セル１０ａｃの受光面２２を第１透明部材４０に接着可能である。第１接着剤４４には、例えば、ＥＶＡが使用される。 The 1st transparent member 40 is arrange | positioned at the light-receiving surface 22 side of one of the adjacent two photovoltaic cells 10, for example, the 13th photovoltaic cell 10ac. The 1st transparent member 40 is comprised with the transparent resin film whose softening temperature is higher than the 1st sealing member 32 and the 2nd sealing member 34, such as PET (polyethylene terephthalate), for example. The first transparent member 40 has a quadrangular shape that is the same size as the solar battery cell 10 in the xy plane. A first adhesive 44 is disposed on the surface of the first transparent member 40 on the thirteenth solar cell 10ac side, and a plurality of first-type wiring members 14 are disposed on the first adhesive 44. The first adhesive 44 can bond the light receiving surface 22 of the thirteenth solar battery cell 10ac to the first transparent member 40. For example, EVA is used for the first adhesive 44.

第２透明部材４２は、隣接した２つの太陽電池セル１０の他方、例えば、第１２太陽電池セル１０ａｂの裏面２４側に配置される。つまり、互いに対向した第１透明部材４０と第２透明部材４２は、１つの太陽電池セル１０を挟み込む。第２透明部材４２は、第１透明部材４０と同様に、例えば、ＰＥＴ等の透明な樹脂フィルムで構成される。第２透明部材４２は、ｘ−ｙ平面において、太陽電池セル１０と同等サイズの四角形の形状を有する。第２透明部材４２における第１２太陽電池セル１０ａｂ側の面には第２接着剤４６が配置され、第２接着剤４６には複数の第１種配線材１４が配置される。第２接着剤４６は、第１２太陽電池セル１０ａｂの裏面２４を第２透明部材４２に接着可能である。第２接着剤４６にも、例えば、ＥＶＡが使用される。 The 2nd transparent member 42 is arrange | positioned at the back surface 24 side of the other of the adjacent two photovoltaic cells 10, for example, the 12th photovoltaic cell 10ab. That is, the first transparent member 40 and the second transparent member 42 facing each other sandwich one solar battery cell 10. Similar to the first transparent member 40, the second transparent member 42 is made of, for example, a transparent resin film such as PET. The second transparent member 42 has a quadrangular shape that is the same size as the solar battery cell 10 in the xy plane. The second adhesive 46 is disposed on the surface of the second transparent member 42 on the twelfth solar cell 10ab side, and the plurality of first-type wiring members 14 are disposed on the second adhesive 46. The second adhesive 46 can adhere the back surface 24 of the twelfth solar battery cell 10ab to the second transparent member 42. For example, EVA is also used for the second adhesive 46.

複数の第１種配線材１４は、第１透明部材４０から第２透明部材４２に延びて、第１透明部材４０と第２透明部材４２とを電気的に接続する。第１透明部材４０から第２透明部材４２との間における複数の第１種配線材１４は、導電材５０によって電気的に接続される。導電材５０は、ｘ軸方向よりもｙ軸方向に長い矩形の板形状を有し、複数の第１種配線材１４を接続する。導電材５０は、金属等の導電性を有した材料によって形成される。導電材５０のｚ軸の正方向側に重ねられるように光反射部材５２が配置される。光反射部材５２は、太陽電池モジュール１００の受光面側から入射された太陽光を反射させる。光反射部材５２の構成は後述する。 The plurality of first-type wiring members 14 extend from the first transparent member 40 to the second transparent member 42 and electrically connect the first transparent member 40 and the second transparent member 42. The plurality of first-type wiring members 14 between the first transparent member 40 and the second transparent member 42 are electrically connected by a conductive material 50. The conductive material 50 has a rectangular plate shape that is longer in the y-axis direction than in the x-axis direction, and connects the plurality of first-type wiring members 14. The conductive material 50 is formed of a conductive material such as metal. The light reflecting member 52 is disposed so as to be superimposed on the positive direction side of the z-axis of the conductive material 50. The light reflecting member 52 reflects sunlight incident from the light receiving surface side of the solar cell module 100. The configuration of the light reflecting member 52 will be described later.

このように構成された樹脂シート８０は、太陽電池モジュール１００の製造とは別に予め製造されている。太陽電池モジュール１００を製造する際、第１接着剤４４が第１３太陽電池セル１０ａｃの受光面２２に接着され、第２接着剤４６が第１２太陽電池セル１０ａｂの裏面２４に接着される。このような接着により、第１種配線材１４は、第１３太陽電池セル１０ａｃの受光面２２におけるフィンガー電極（図示せず）と、第１２太陽電池セル１０ａｂの裏面２４におけるフィンガー電極（図示せず）とを電気的に接続する。図２に戻る。 The resin sheet 80 configured as described above is manufactured in advance separately from the manufacturing of the solar cell module 100. When manufacturing the solar cell module 100, the 1st adhesive agent 44 is adhere | attached on the light-receiving surface 22 of the 13th photovoltaic cell 10ac, and the 2nd adhesive agent 46 is adhere | attached on the back surface 24 of the 12th photovoltaic cell 10ab. By such adhesion, the first-type wiring member 14 is provided with finger electrodes (not shown) on the light receiving surface 22 of the thirteenth solar cell 10ac and finger electrodes (not shown) on the back surface 24 of the twelfth solar cell 10ab. Are electrically connected to each other. Returning to FIG.

第１透明部材４０と第２透明部材４２の接着が、他の太陽電池セル１０に対してもなされることによって、図１に示すようなストリング１２が形成される。第２封止部材３４は、第１封止部材３２の裏面側に積層される。第２封止部材３４は、第１封止部材３２との間で、複数の太陽電池セル１０、第１種配線材１４、第２種配線材１６、第３種配線材１８、第１透明部材４０、第２透明部材４２等を封止する。第２封止部材３４には、第１封止部材３２と同様のものを用いることができる。また、ラミネート・キュア工程における加熱によって、第２封止部材３４は第１封止部材３２と一体化されていてもよい。 The first transparent member 40 and the second transparent member 42 are bonded to the other solar cells 10 to form the string 12 as shown in FIG. The second sealing member 34 is stacked on the back side of the first sealing member 32. Between the second sealing member 34 and the first sealing member 32, the plurality of solar cells 10, the first type wiring material 14, the second type wiring material 16, the third type wiring material 18, and the first transparent member. The member 40, the second transparent member 42, and the like are sealed. The same material as the first sealing member 32 can be used for the second sealing member 34. Further, the second sealing member 34 may be integrated with the first sealing member 32 by heating in the laminating and curing process.

第２保護部材３６は、第１保護部材３０に対向するように、第２封止部材３４の裏面側に積層される。第２保護部材３６は、バックシートとして太陽電池モジュール１００の裏面側を保護する。第２保護部材３６としては、ＰＥＴ、ＰＴＦＥ（ポリテトラフルオロエチレン)等の樹脂フィルム、Ａｌ箔をポリオレフィン等の樹脂フィルムで挟んだ構造を有する積層フィルムなどが使用される。 The second protection member 36 is stacked on the back surface side of the second sealing member 34 so as to face the first protection member 30. The 2nd protection member 36 protects the back surface side of the solar cell module 100 as a back sheet. As the second protective member 36, a resin film such as PET or PTFE (polytetrafluoroethylene), a laminated film having a structure in which an Al foil is sandwiched between resin films such as polyolefin, or the like is used.

以下では、ストリング１２の構成をさらに詳細に説明する。図４（ａ）−（ｂ）は、ストリング１２の部分構造を示す。図４（ａ）は太陽電池セル１０の受光面２２を示し、図４（ｂ）は、図４（ａ）のＢ−Ｂ’断面図である。なお、図面を明瞭にするために、図４（ａ）と図１では、ｘ軸とｙ軸の方向が変えられている。これらでは、説明を明瞭にするために、第１透明部材４０、第２透明部材４２、第１接着剤４４、第２接着剤４６を省略し、太陽電池セル１０、第１種配線材１４、導電材５０、光反射部材５２のみが示される。 Hereinafter, the configuration of the string 12 will be described in more detail. FIGS. 4A and 4B show a partial structure of the string 12. 4A shows the light receiving surface 22 of the solar battery cell 10, and FIG. 4B is a cross-sectional view taken along the line B-B ′ in FIG. 4A. In order to clarify the drawing, the directions of the x-axis and the y-axis are changed in FIG. 4A and FIG. In these, for the sake of clarity of explanation, the first transparent member 40, the second transparent member 42, the first adhesive 44, and the second adhesive 46 are omitted, and the solar battery cell 10, the first type wiring member 14, Only the conductive material 50 and the light reflecting member 52 are shown.

図４（ａ）は、ストリング１２のうち、第１２太陽電池セル１０ａｂと第１３太陽電池セル１０ａｃとの接続部分を示すが、他の太陽電池セル１０も同様に構成される。第１２太陽電池セル１０ａｂと第１３太陽電池セル１０ａｃの受光面２２には、ｙ軸方向に延びるフィンガー電極２６が、ｘ軸方向に複数並べられる。フィンガー電極２６は、集電極に相当し、例えば、樹脂と銀粒子とが混合した銀ペースト(エポキシ樹脂・エステルを含む)により形成される。 FIG. 4A shows a connection portion between the twelfth solar cell 10ab and the thirteenth solar cell 10ac in the string 12, but the other solar cells 10 are similarly configured. On the light receiving surfaces 22 of the twelfth solar cell 10ab and the thirteenth solar cell 10ac, a plurality of finger electrodes 26 extending in the y-axis direction are arranged in the x-axis direction. The finger electrode 26 corresponds to a collecting electrode, and is formed of, for example, a silver paste (including epoxy resin / ester) in which a resin and silver particles are mixed.

また、第１２太陽電池セル１０ａｂと第１３太陽電池セル１０ａｃの受光面２２には、フィンガー電極２６に交差、例えば直交するようにｘ軸方向に延びる複数の第１種配線材１４が配置される。第１種配線材１４は、例えば、断面が略円形の銅心材を低融点半田でコートすることによって形成される。ここで、第１種配線材１４の金属密度は、フィンガー電極２６の金属密度よりも高いので、第１種配線材１４の電気抵抗率は、フィンガー電極２６の電気抵抗率よりも小さくなる。 A plurality of first-type wiring members 14 that extend in the x-axis direction are arranged on the light receiving surfaces 22 of the twelfth solar cell 10ab and the thirteenth solar cell 10ac so as to intersect the finger electrode 26, for example, orthogonally. . The first type wiring material 14 is formed by coating a copper core material having a substantially circular cross section with a low melting point solder, for example. Here, since the metal density of the first type wiring member 14 is higher than the metal density of the finger electrode 26, the electric resistivity of the first type wiring member 14 is smaller than the electric resistivity of the finger electrode 26.

第１２太陽電池セル１０ａｂと第１３太陽電池セル１０ａｃはｘ軸方向に離間して配置され、それらの間はｘ軸方向に延びる複数の第１種配線材１４によって接続される。また、第１２太陽電池セル１０ａｂと第１３太陽電池セル１０ａｃとの間に配置された複数の第１種配線材１４を接続するように、ｘ軸方向よりもｙ軸方向に長い矩形状の光反射部材５２が配置される。この部分の断面図は図４（ｂ）に示される。 The twelfth solar battery cell 10ab and the thirteenth solar battery cell 10ac are spaced apart from each other in the x-axis direction, and are connected by a plurality of first-type wiring members 14 extending in the x-axis direction. In addition, rectangular light longer in the y-axis direction than in the x-axis direction so as to connect the plurality of first-type wiring members 14 arranged between the twelfth solar battery cell 10ab and the thirteenth solar battery cell 10ac. A reflection member 52 is disposed. A cross-sectional view of this part is shown in FIG.

図４（ｂ）において、断面が略円形の第１種配線材１４がｙ軸方向に並んで複数配置される。複数の第１種配線材１４のｚ軸の正方向側には、複数の第１種配線材１４が並ぶｙ軸方向の長さよりも長くｙ軸方向に延びる接着剤５８が配置される。接着剤５８は導電性の接着剤であり、複数の第１種配線材１４を導電材５０に接続させる。導電材５０は、接着剤５８のｚ軸の正方向側に配置され、接着剤５８と同様に、複数の第１種配線材１４が並ぶｙ軸方向の長さよりも長くｙ軸方向に延びる。導電材５０は、前述のごとく、複数の第１種配線材１４を電気的に接続する。導電材５０のｚ軸の正方向側には光反射部材５２が配置される。 In FIG. 4B, a plurality of first-type wiring members 14 having a substantially circular cross section are arranged side by side in the y-axis direction. An adhesive 58 that extends in the y-axis direction longer than the length in the y-axis direction in which the plurality of first-type wiring members 14 are arranged is disposed on the positive side of the z-axis of the plurality of first-type wiring members 14. The adhesive 58 is a conductive adhesive and connects the plurality of first-type wiring members 14 to the conductive member 50. The conductive material 50 is disposed on the positive side of the z-axis of the adhesive 58 and extends in the y-axis direction longer than the length in the y-axis direction in which the plurality of first-type wiring members 14 are arranged. As described above, the conductive material 50 electrically connects the plurality of first-type wiring members 14. A light reflecting member 52 is disposed on the positive side of the z-axis of the conductive material 50.

光反射部材５２は、樹脂基材５４と、樹脂基材５４の表面に形成された反射膜５６とを有する。樹脂基材５４は、例えば、ＰＥＴまたはアクリル等によって構成される。また、反射膜５６は、例えば、アルミニウムまたは銀等の金属からなる金属膜であり、ここでは、アルミニウム蒸着膜である。樹脂基材５４の表面には、ｘ−ｚ平面において略三角形形状の断面を有した突起がｘ軸方向に複数並べられる。この突起はｙ軸方向に延びるので、樹脂基材５４は、ｘ−ｚ平面に底面を有してｙ軸方向に延びる略三角柱がｘ軸方向に複数並べられた形状を有する。これは、ｙ軸方向に延びる三角溝形状がｘ軸方向に複数並べられることに相当する。また、樹脂基材５４の表面の形状と同様に、反射膜５６が形成される。このように、樹脂基材５４と反射膜５６とが積層され、表面に複数の突起を備えた光反射部材５２が構成される。 The light reflecting member 52 includes a resin base material 54 and a reflective film 56 formed on the surface of the resin base material 54. The resin base 54 is made of, for example, PET or acrylic. The reflective film 56 is a metal film made of a metal such as aluminum or silver, and is an aluminum vapor deposition film here. A plurality of protrusions having a substantially triangular cross section in the xz plane are arranged on the surface of the resin base material 54 in the x-axis direction. Since this protrusion extends in the y-axis direction, the resin base material 54 has a shape in which a plurality of substantially triangular prisms having a bottom surface in the xz plane and extending in the y-axis direction are arranged in the x-axis direction. This corresponds to a plurality of triangular groove shapes extending in the y-axis direction being arranged in the x-axis direction. Further, the reflective film 56 is formed in the same manner as the shape of the surface of the resin base material 54. Thus, the resin base material 54 and the reflective film 56 are laminated, and the light reflecting member 52 having a plurality of protrusions on the surface is configured.

複数の突起は、太陽電池モジュール１００に入射し、かつ隣接した太陽電池セル１０の隙間に到達した太陽光を散乱させて、第１保護部材３０と空気層との界面、あるいは第１保護部材３０と第１封止部材３２との界面で反射させる。このような反射により、太陽光は、太陽電池セル１０へと導かれる。樹脂基材５４の厚さは、例えば５０μｍ〜５００μｍである。突起と溝部の間の高さが５μｍ以上かつ１００μｍ以下であり、隣接した突起の間隔（ピッチ）が２０μｍ以上かつ４００μｍ以下である。ここでは、突起と溝部との間の高さが１２μｍであり、隣接した突起の間隔（ピッチ）が４０μｍである。なお、光反射部材５２は、ｙ軸方向に延びる三角溝形状がｘ軸方向に並べられているとしたが、これに限定されるものではなく、太陽光を散乱させることができるものであれば、円錐形状、四角錐形状、多角錐形状、あるいはこれらの形状の組合せであってもよい。 The plurality of projections are incident on the solar cell module 100 and scatter the sunlight that has reached the gaps between the adjacent solar cells 10, so that the interface between the first protection member 30 and the air layer or the first protection member 30. And reflected at the interface between the first sealing member 32 and the first sealing member 32. Due to such reflection, sunlight is guided to the solar battery cell 10. The thickness of the resin base material 54 is, for example, 50 μm to 500 μm. The height between the protrusion and the groove is 5 μm or more and 100 μm or less, and the interval (pitch) between adjacent protrusions is 20 μm or more and 400 μm or less. Here, the height between the protrusion and the groove is 12 μm, and the interval (pitch) between adjacent protrusions is 40 μm. The light reflecting member 52 has triangular groove shapes extending in the y-axis direction arranged in the x-axis direction. However, the light reflecting member 52 is not limited to this, and any member that can scatter sunlight can be used. , A cone shape, a quadrangular pyramid shape, a polygonal pyramid shape, or a combination of these shapes.

以下では、太陽電池モジュール１００の製造方法について説明する。まず、樹脂シート８０が用意される。隣接した２つの太陽電池セル１０の一方に樹脂シート８０の第１透明部材４０を重ね合せるとともに、隣接した２つの太陽電池セル１０の他方に樹脂シート８０の第２透明部材４２を重ね合せることによって、ストリング１２が生成される。また、ストリング１２において隣接した２つの太陽電池セル１０の間の複数の第１種配線材１４に導電材５０、光反射部材５２が取り付けられる。ｚ軸の正方向から負方向に向かって、第１保護部材３０、第１封止部材３２、ストリング１２、第２封止部材３４、第２保護部材３６が順に重ね合せられることによって、積層体が生成される。これに続いて、積層体に対して、ラミネート・キュア工程がなされる。この工程では、積層体から空気を抜き、加熱、加圧して、積層体を一体化する。ラミネート・キュア工程における真空ラミネートでは、温度が前述のごとく、５０〜１４０℃程度に設定される。さらに、第２保護部材３６に対して、端子ボックスが接着剤にて取り付けられる。 Below, the manufacturing method of the solar cell module 100 is demonstrated. First, the resin sheet 80 is prepared. By overlapping the first transparent member 40 of the resin sheet 80 on one of the two adjacent solar cells 10 and overlapping the second transparent member 42 of the resin sheet 80 on the other of the two adjacent solar cells 10 , String 12 is generated. In addition, the conductive material 50 and the light reflecting member 52 are attached to the plurality of first-type wiring members 14 between two solar cells 10 adjacent in the string 12. The first protective member 30, the first sealing member 32, the string 12, the second sealing member 34, and the second protective member 36 are sequentially stacked in this order from the positive direction of the z axis toward the negative direction. Is generated. Following this, a laminate curing process is performed on the laminate. In this step, air is extracted from the laminated body, and heated and pressurized to integrate the laminated body. In vacuum laminating in the laminating and curing process, the temperature is set to about 50 to 140 ° C. as described above. Furthermore, a terminal box is attached to the second protective member 36 with an adhesive.

本実施例によれば、隣接する太陽電池セル１０の一方と他方との間において複数の第１種配線材１４を導電材５０によって電気的に接続するので、第１種配線材１４を細くする場合であっても、各第１種配線材１４に流れる電流を均一に近づけることができる。また、各第１種配線材１４に流れる電流が均一に近づくので、特定の第１種配線材１４に流れる電流だけが大きくなる状況の発生を抑制できる。また、特定の第１種配線材１４に流れる電流だけが大きくなる状況の発生が抑制されるので、特定の第１種配線材１４が抵抗となる状況の発生を抑制できる。また、特定の第１種配線材１４が抵抗となる状況の発生が抑制されるので、太陽電池モジュール１００の出力の効率を向上できる。 According to the present embodiment, since the plurality of first type wiring members 14 are electrically connected by the conductive material 50 between one and the other of the adjacent solar cells 10, the first type wiring member 14 is thinned. Even in this case, the current flowing through each of the first-type wiring members 14 can be made close to uniform. Moreover, since the currents flowing through the first-type wiring members 14 approach uniformly, the occurrence of a situation in which only the current flowing through the specific first-type wiring members 14 can be suppressed. Moreover, since the occurrence of a situation where only the current flowing through the specific first type wiring material 14 is suppressed is suppressed, the occurrence of a situation where the specific first type wiring material 14 becomes a resistance can be suppressed. Moreover, since generation | occurrence | production of the condition where the specific 1st type wiring material 14 becomes resistance is suppressed, the efficiency of the output of the solar cell module 100 can be improved.

また、樹脂シート８０を太陽電池セル１０に貼り付けることによってストリング１２が形成されるので、太陽電池モジュール１００の製造の複雑化を抑制しながら、太陽電池モジュール１００の出力効率を向上できる。また、光反射部材５２を導電材５０に重ねて配置させるので、隣接した２つの太陽電池セル１０の間に入射する太陽光を発電に有効に寄与させることができる。また、隣接した２つの太陽電池セル１０の間に入射する太陽光を発電に有効に寄与させるので、太陽電池モジュール１００の変換効率を向上できる。 Moreover, since the string 12 is formed by sticking the resin sheet 80 to the solar battery cell 10, the output efficiency of the solar battery module 100 can be improved while suppressing the manufacturing complexity of the solar battery module 100. Moreover, since the light reflection member 52 is disposed so as to overlap the conductive material 50, sunlight incident between two adjacent solar cells 10 can be effectively contributed to power generation. Moreover, since the sunlight which injects between the two adjacent photovoltaic cells 10 contributes effectively to electric power generation, the conversion efficiency of the solar cell module 100 can be improved.

本発明の一態様の概要は、次の通りである。本発明のある態様の太陽電池モジュール１００は、複数の太陽電池セル１０と、隣接する太陽電池セル１０の一方から他方に延びて、隣接する太陽電池セル１０を電気的に接続する複数の第１種配線材１４と、隣接する太陽電池セル１０の一方と他方との間において、複数の第１種配線材１４を電気的に接続する導電材５０と、を備える。 The outline of one embodiment of the present invention is as follows. The solar cell module 100 according to an aspect of the present invention includes a plurality of solar cells 10 and a plurality of first cells that extend from one of the adjacent solar cells 10 to the other and electrically connect the adjacent solar cells 10. A seed wiring member 14 and a conductive material 50 that electrically connects the plurality of first type wiring members 14 between one and the other of the adjacent solar cells 10 are provided.

複数の太陽電池セル１０のそれぞれは、太陽電池セル１０の受光面２２側に配置され第１種配線材１４と交差する方向に互いに平行に延びる複数の受光面２２側のフィンガー電極２６と、太陽電池セル１０の裏面２４側に配置され第１種配線材１４と交差する方向に互いに平行に延びる複数の裏面２４側のフィンガー電極２６と、を含み、複数の第１種配線材１４は、隣接する太陽電池セル１０の一方の受光面２２側のフィンガー電極２６から、隣接する太陽電池セル１０の他方の裏面２４側のフィンガー電極２６に延びてもよい。 Each of the plurality of solar cells 10 is disposed on the light receiving surface 22 side of the solar cells 10 and extends in parallel with each other in the direction intersecting the first type wiring member 14. A plurality of finger electrodes 26 on the back surface 24 side that are arranged on the back surface 24 side of the battery cell 10 and extend parallel to each other in a direction intersecting the first type wiring material 14, and the plurality of first type wiring materials 14 are adjacent to each other. It may extend from the finger electrode 26 on the one light receiving surface 22 side of the solar battery cell 10 to the finger electrode 26 on the other back surface 24 side of the adjacent solar battery cell 10.

複数の太陽電池セル１０の受光面２２側に配置され、複数の第１種配線材１４に接着される第１透明部材４０と、複数の太陽電池セル１０の裏面２４側に配置され、複数の第１種配線材１４に接着される複数の第２透明部材４２と、をさらに備え、第１透明部材４０と第２透明部材４２のうち、互いに対向した第１透明部材４０と第２透明部材４２は、１つの太陽電池セル１０を挟み込んでもよい。 The first transparent member 40 disposed on the light receiving surface 22 side of the plurality of solar cells 10 and bonded to the plurality of first type wiring members 14, and disposed on the back surface 24 side of the plurality of solar cells 10, A plurality of second transparent members 42 bonded to the first type wiring member 14, and of the first transparent member 40 and the second transparent member 42, the first transparent member 40 and the second transparent member facing each other. 42 may sandwich one solar battery cell 10.

第１透明部材４０の第１面側に設けられる第１保護部材３０と、第１透明部材４０の第１面側であって、第１透明部材４０と第１保護部材３０との間に設けられる第１封止部材３２と、第２透明部材４２の第２面側に設けられる第２保護部材３６と、第２透明部材４２の第２面側であって、第２透明部材４２と第２保護部材３６との間に設けられる第２封止部材３４と、をさらに備え、第１封止部材３２および第２封止部材３４は、第１保護部材３０および第２保護部材３６よりも軟化温度が低くてもよい。 The first protective member 30 provided on the first surface side of the first transparent member 40 and the first surface side of the first transparent member 40 provided between the first transparent member 40 and the first protective member 30 The first sealing member 32, the second protection member 36 provided on the second surface side of the second transparent member 42, the second surface side of the second transparent member 42, and the second transparent member 42 and the second transparent member 42. And a second sealing member 34 provided between the first protective member 36 and the second protective member 36, and the first sealing member 32 and the second sealing member 34 are more than the first protective member 30 and the second protective member 36. The softening temperature may be low.

導電材５０に重ねて配置される光反射部材５２をさらに備えてもよい。 You may further provide the light reflection member 52 arrange | positioned on the electrically-conductive material 50. FIG.

（実施例２）
次に、実施例２を説明する。実施例２は、実施例１と同様に、樹脂フィルムを太陽電池セルに貼り付けることによって形成したストリングを含む太陽電池モジュールに関する。実施例１では、導電材によって複数の第１種配線材が電気的に接続されるとともに、導電材に光反射部材が重ねられる。実施例２は、実施例１と比較して、導電材、光反射部材の構成が異なる。実施例２に係る太陽電池モジュール１００は、図１と同様のタイプである。ここでは、これまでとの差異を中心に説明する。 (Example 2)
Next, Example 2 will be described. Example 2 is related with the solar cell module containing the string formed by affixing a resin film on a photovoltaic cell similarly to Example 1. FIG. In Example 1, a plurality of first-type wiring members are electrically connected by a conductive material, and a light reflecting member is superimposed on the conductive material. The second embodiment is different from the first embodiment in the configuration of the conductive material and the light reflecting member. The solar cell module 100 according to Example 2 is the same type as that in FIG. Here, it demonstrates centering on the difference from before.

図５（ａ）−（ｂ）は、本発明の実施例２に係るストリング１２の部分構造を示す。図５（ａ）は、図４（ｂ）の別の構成を示し、図４（ｂ）と同様に示される。光反射部材５２における樹脂基材５４と反射膜５６は、図４（ｂ）と同様に構成される。反射膜５６のｚ軸の正方向側に複数の第１種配線材１４が配置される。具体的には、反射膜５６におけるｙ軸方向に延びる三角溝形状と直交するように第１種配線材１４が配置される。前述のごとく、反射膜５６は、金属膜であり、導電性を有する。つまり、図４（ｂ）の構成では、反射膜５６が導電材の機能を有する。そのため、導電材５０は、光反射部材５２としても構成される。 5A to 5B show a partial structure of the string 12 according to the second embodiment of the present invention. FIG. 5A shows another configuration of FIG. 4B and is shown in the same manner as FIG. 4B. The resin base material 54 and the reflective film 56 in the light reflecting member 52 are configured in the same manner as in FIG. A plurality of first-type wiring members 14 are arranged on the positive side of the z-axis of the reflective film 56. Specifically, the first type wiring member 14 is arranged so as to be orthogonal to the triangular groove shape extending in the y-axis direction in the reflective film 56. As described above, the reflection film 56 is a metal film and has conductivity. That is, in the configuration of FIG. 4B, the reflective film 56 has a function of a conductive material. Therefore, the conductive material 50 is also configured as the light reflecting member 52.

図５（ｂ）は、図４（ｂ）のさらに別の構成を示し、図４（ｂ）と同様に示される。複数の第１種配線材１４、接着剤５８、導電材５０は、図４（ｂ）と同様に構成される。導電材５０のｚ軸の正方向側には、第１樹脂材６０が配置され、接着剤５８のｚ軸の負方向側には、第２樹脂材６２が配置される。つまり、第１樹脂材６０と第２樹脂材６２は、導電材５０を覆う。第１樹脂材６０と第２樹脂材６２は、絶縁物質である。導電材５０は、第１樹脂材６０と第２樹脂材６２に覆われているので、高温環境において第１種配線材１４が伸縮する場合であっても、伸びた第１種配線材１４に導電材５０が接触することによるショートの発生が抑制される。 FIG. 5B shows still another configuration of FIG. 4B and is shown in the same manner as FIG. The plurality of first-type wiring members 14, the adhesive 58, and the conductive material 50 are configured in the same manner as in FIG. The first resin material 60 is disposed on the positive direction side of the z-axis of the conductive material 50, and the second resin material 62 is disposed on the negative direction side of the adhesive 58 with respect to the z-axis. That is, the first resin material 60 and the second resin material 62 cover the conductive material 50. The first resin material 60 and the second resin material 62 are insulating materials. Since the conductive material 50 is covered with the first resin material 60 and the second resin material 62, even if the first type wiring material 14 expands and contracts in a high temperature environment, the conductive material 50 does not reach the extended first type wiring material 14. Generation | occurrence | production of the short circuit by the electrically conductive material 50 contacting is suppressed.

本実施例によれば、導電材５０は光反射部材５２としても構成されるので、複数の第１種配線材１４を電気的に接続する機能と太陽光を反射させる機能を簡易に構成できる。また、複数の第１種配線材１４を電気的に接続するので、太陽電池モジュール１００の出力の効率を向上できる。また、第１樹脂材６０、第２樹脂材６２によって、導電材５０を覆うので、高温環境において第１種配線材１４が伸縮する場合であっても、ショートの発生を抑制できる。また、ショートの発生が抑制されるので、高温環境における太陽電池モジュール１００の使用可能性を向上できる。 According to the present embodiment, since the conductive material 50 is also configured as the light reflecting member 52, the function of electrically connecting the plurality of first-type wiring members 14 and the function of reflecting sunlight can be easily configured. Moreover, since the several 1st type wiring material 14 is electrically connected, the efficiency of the output of the solar cell module 100 can be improved. Moreover, since the conductive material 50 is covered by the first resin material 60 and the second resin material 62, the occurrence of a short circuit can be suppressed even when the first type wiring material 14 expands and contracts in a high temperature environment. Moreover, since generation | occurrence | production of a short circuit is suppressed, the usability of the solar cell module 100 in a high temperature environment can be improved.

本発明の一態様の概要は、次の通りである。導電材５０は、光反射部材５２としても構成されてもよい。 The outline of one embodiment of the present invention is as follows. The conductive material 50 may also be configured as the light reflecting member 52.

導電材５０を覆う第１樹脂材６０、第２樹脂材６２をさらに備えてもよい。 A first resin material 60 and a second resin material 62 that cover the conductive material 50 may be further provided.

以上、本発明について、実施例をもとに説明した。この実施例は例示であり、それらの各構成要素あるいは各処理プロセスの組合せにいろいろな変形例が可能なこと、また、そうした変形例も本発明の範囲にあることは当業者に理解されるところである。 In the above, this invention was demonstrated based on the Example. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to the respective components or combinations of the respective treatment processes, and such modifications are also within the scope of the present invention. is there.

実施例１と実施例２とを組み合わせてもよい。本変形例によれば、組合せによる効果を得ることができる。 The first embodiment and the second embodiment may be combined. According to this modification, the effect by the combination can be obtained.

実施例１と２において、樹脂シート８０が使用されている。しかしながらこれに限らず例えば、樹脂シート８０が使用されず、隣接した太陽電池セル１０が第１種配線材１４によって接続されてもよい。その際、第１種配線材１４はワイヤでなくてもよい。本変形例によれば、構成の自由度を向上できる。 In Examples 1 and 2, a resin sheet 80 is used. However, the present invention is not limited thereto, and for example, the resin sheet 80 may not be used, and the adjacent solar cells 10 may be connected by the first type wiring member 14. At that time, the first type wiring member 14 may not be a wire. According to this modification, the degree of freedom of configuration can be improved.

また、実施例１において、光反射部材５２の樹脂基材５４は、第１透明部材４０、第２透明部材４２のどちらとも繋がっておらず、独立して第１種配線材１４の上に接着される。しかしながらこれに限らず例えば、光反射部材５２の樹脂基材５４と第１透明部材４０とが一体的に形成されてもよい。また、光反射部材５２の樹脂基材５４と第２透明部材４２とが一体的に形成されてもよい。実施例１の図３に示されたように光反射部材５２が第１種配線材１４のｚ軸の正方向側に配置される場合、第１種配線材１４のｚ軸の正方向側に配置される第１透明部材４０と樹脂基材５４とを一体的に形成することが好ましい。このとき、樹脂フィルムで形成される第１透明部材４０と樹脂基材５４とは一体的に形成するが、金属材料を含んで形成される反射膜５６は、隣接する太陽電池セル１０の間の領域に形成する。 In Example 1, the resin base material 54 of the light reflecting member 52 is not connected to either the first transparent member 40 or the second transparent member 42 and is independently bonded onto the first type wiring member 14. Is done. However, the present invention is not limited to this. For example, the resin base material 54 of the light reflecting member 52 and the first transparent member 40 may be integrally formed. Further, the resin base material 54 and the second transparent member 42 of the light reflecting member 52 may be integrally formed. As shown in FIG. 3 of the first embodiment, when the light reflecting member 52 is arranged on the positive direction side of the z-axis of the first type wiring member 14, It is preferable to form the 1st transparent member 40 and the resin base material 54 which are arrange | positioned integrally. At this time, the first transparent member 40 formed of a resin film and the resin base material 54 are integrally formed, but the reflective film 56 formed including a metal material is formed between adjacent solar cells 10. Form in the area.

実施例２においても、第１樹脂材６０、第２樹脂材６２のいずれか一方を、第１透明部材４０、第２透明部材４２のいずれか一方と一体的に形成してもよい。例えば、第１樹脂材６０を第１透明部材４０と一体的に形成してもよいし、第２樹脂材６２を第２透明部材４２と一体的に形成してもよい。第１樹脂材６０を第１透明部材４０と一体的に形成し、かつ、第２樹脂材６２を第２透明部材４２と一体的に形成してもよい。 Also in the second embodiment, one of the first resin material 60 and the second resin material 62 may be formed integrally with either the first transparent member 40 or the second transparent member 42. For example, the first resin material 60 may be formed integrally with the first transparent member 40, or the second resin material 62 may be formed integrally with the second transparent member 42. The first resin material 60 may be formed integrally with the first transparent member 40, and the second resin material 62 may be formed integrally with the second transparent member 42.

１０太陽電池セル、１２ストリング、１４第１種配線材、１６第２種配線材、１８第３種配線材、２０フレーム、２２受光面、２４裏面、２６フィンガー電極、３０第１保護部材、３２第１封止部材、３４第２封止部材、３６第２保護部材、４０第１透明部材、４２第２透明部材、４４第１接着剤、４６第２接着剤、５０導電材、５２光反射部材、５４樹脂基材、５６反射膜、５８接着剤、６０第１樹脂材、６２第２樹脂材、８０樹脂シート、１００太陽電池モジュール。 DESCRIPTION OF SYMBOLS 10 Solar cell, 12 String, 14 1st type wiring material, 16 2nd type wiring material, 18 3rd type wiring material, 20 Frame, 22 Light-receiving surface, 24 Back surface, 26 Finger electrode, 30 1st protection member, 32 First sealing member, 34 Second sealing member, 36 Second protective member, 40 First transparent member, 42 Second transparent member, 44 First adhesive, 46 Second adhesive, 50 Conductive material, 52 Light reflection Member, 54 resin base material, 56 reflective film, 58 adhesive, 60 first resin material, 62 second resin material, 80 resin sheet, 100 solar cell module.

Claims

A plurality of solar cells,
A plurality of wiring members extending from one of the adjacent solar cells to the other to electrically connect the adjacent solar cells;
Between one and the other of the adjacent solar cells, a conductive material that electrically connects the plurality of wiring materials,
A solar cell module comprising:

Each of the plurality of solar cells is arranged on the light receiving surface side of the solar cells and extends in parallel to each other in the direction intersecting the wiring member, and the back surface side of the solar cells A plurality of back-side finger electrodes extending in parallel with each other in a direction intersecting with the wiring member,
The plurality of wiring members extend from one finger electrode on the light receiving surface side of one of the adjacent solar cells to a finger electrode on the other rear surface side of the adjacent solar cell. The solar cell module according to.

A first transparent member disposed on the light-receiving surface side of the plurality of solar cells and bonded to the plurality of wiring members;
A plurality of second transparent members disposed on the back surface side of the plurality of solar cells and bonded to the plurality of wiring members;
3. The sun according to claim 2, wherein, of the first transparent member and the second transparent member, the first transparent member and the second transparent member facing each other sandwich one solar cell. Battery module.

A first protective member provided on the first surface side of the first transparent member;
A first sealing member provided on the first surface side of the first transparent member and between the first transparent member and the first protective member;
A second protective member provided on the second surface side of the second transparent member;
A second sealing member provided on the second surface side of the second transparent member and between the second transparent member and the second protective member;
The solar cell module according to claim 3, wherein the first sealing member and the second sealing member have a softening temperature lower than that of the first protective member and the second protective member.

The solar cell module according to claim 1, further comprising a light reflecting member disposed so as to overlap the conductive material.

The solar cell module according to claim 1, wherein the conductive material is also configured as a light reflecting member.

The solar cell module according to claim 1, further comprising a resin material that covers the conductive material.