JP2014072201A - Solar cell module - Google Patents

Solar cell module Download PDF

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Publication number
JP2014072201A
JP2014072201A JP2012214386A JP2012214386A JP2014072201A JP 2014072201 A JP2014072201 A JP 2014072201A JP 2012214386 A JP2012214386 A JP 2012214386A JP 2012214386 A JP2012214386 A JP 2012214386A JP 2014072201 A JP2014072201 A JP 2014072201A
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Prior art keywords
solar cell
protective member
cell module
main surface
sealing material
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JP2012214386A
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Toshiyuki Sakuma
俊行 佐久間
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Priority to JP2012214386A priority Critical patent/JP2014072201A/en
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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
    • 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

PROBLEM TO BE SOLVED: To provide a solar cell module having excellent output characteristics.SOLUTION: A solar cell module 1 includes a solar cell 10, a first protective member 12, a second protective member 13, and a sealing material 11. The first protective member 12 is arranged on the light-receiving face 10a side of the solar cell 10. The second protective member 13 is arranged on the rear face 10b side of the solar cell 10. The sealing material 11 is arranged between the first protective member 12 and the second protective member 13. The sealing material 11 seals the solar cell 10. The first protective member 12 has a light transmitting plate 21 and a filled part 22. The light transmitting plate 21 has irregularities 21a1 on the main surface 21a thereof on a side opposite to the solar cell 10. The filled part 22 is arranged in a recessed part of the main surface 21a. The filled part 22 has a refractive index lower than that of the light transmitting plate 21.

Description

本発明は、太陽電池モジュールに関する。   The present invention relates to a solar cell module.

近年、環境負荷が低いエネルギー源として、太陽電池モジュールに対する注目が高まってきている。特許文献１に記載のように、太陽電池モジュールは、太陽電池と、太陽電池の受光面側に配された第１の保護部材と、太陽電池の裏面側に配された第２の保護部材と、第１の保護部材と第２の保護部材との間に配されており、太陽電池を封止する封止材とを備える。   In recent years, attention has been paid to solar cell modules as an energy source having a low environmental load. As described in Patent Document 1, the solar cell module includes a solar cell, a first protection member disposed on the light receiving surface side of the solar cell, and a second protection member disposed on the back surface side of the solar cell. And a sealing material that is disposed between the first protection member and the second protection member and seals the solar cell.

特開２０１２−１７５０６５号公報JP 2012-175065 A

太陽電池モジュールの出力特性を改善したいという要望がある。   There is a desire to improve the output characteristics of solar cell modules.

本発明の主な目的は、優れた出力特性を有する太陽電池モジュールを提供することである。   A main object of the present invention is to provide a solar cell module having excellent output characteristics.

本発明に係る太陽電池モジュールは、太陽電池と、第１の保護部材と、第２の保護部材と、封止材とを備える。第１の保護部材は、太陽電池の受光面側に配されている。第２の保護部材は、太陽電池の裏面側に配されている。封止材は、第１の保護部材と第２の保護部材との間に配されている。封止材は、太陽電池を封止している。第１の保護部材は、透光板と、充填部とを有する。透光板は、太陽電池とは反対側の主面に凹凸を有する。充填部は、主面の凹部に配されている。充填部の屈折率は、透光板よりも低い。   The solar cell module according to the present invention includes a solar cell, a first protective member, a second protective member, and a sealing material. The first protective member is disposed on the light receiving surface side of the solar cell. The 2nd protection member is distribute | arranged to the back surface side of the solar cell. The sealing material is disposed between the first protective member and the second protective member. The sealing material seals the solar cell. The first protective member has a light transmissive plate and a filling portion. The translucent plate has irregularities on the main surface opposite to the solar cell. The filling portion is disposed in the concave portion of the main surface. The refractive index of the filling portion is lower than that of the translucent plate.

本発明によれば、優れた出力特性を有する太陽電池モジュールを提供することができる。   According to the present invention, a solar cell module having excellent output characteristics can be provided.

図１は、本発明の一実施形態に係る太陽電池モジュールの略図的断面図である。FIG. 1 is a schematic cross-sectional view of a solar cell module according to an embodiment of the present invention. 図２は、本発明の一実施形態における第１の保護部材の略図的断面図である。FIG. 2 is a schematic cross-sectional view of the first protective member in one embodiment of the present invention. 図３は、本発明の一実施形態における透光板の略図的平面図である。FIG. 3 is a schematic plan view of a light transmitting plate according to an embodiment of the present invention.

以下、本発明を実施した好ましい形態の一例について説明する。但し、下記の実施形態は、単なる例示である。本発明は、下記の実施形態に何ら限定されない。   Hereinafter, an example of the preferable form which implemented this invention is demonstrated. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

また、実施形態等において参照する各図面において、実質的に同一の機能を有する部材は同一の符号で参照することとする。また、実施形態等において参照する図面は、模式的に記載されたものであり、図面に描画された物体の寸法の比率などは、現実の物体の寸法の比率などとは異なる場合がある。図面相互間においても、物体の寸法比率等が異なる場合がある。具体的な物体の寸法比率等は、以下の説明を参酌して判断されるべきである。   Moreover, in each drawing referred in embodiment etc., the member which has a substantially the same function shall be referred with the same code | symbol. The drawings referred to in the embodiments and the like are schematically described, and the ratio of the dimensions of the objects drawn in the drawings may be different from the ratio of the dimensions of the actual objects. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.

図１に示されるように、太陽電池モジュール１は、太陽電池１０を備える。具体的には、太陽電池モジュール１は、配線材１４により電気的に接続された複数の太陽電池１０を備える。太陽電池１０は、受光面１０ａと、裏面１０ｂとを有する。ここで、受光面１０ａとは、一対の主面のうち、受光量が相対的に多い方の主面であり、受光量が相対的に少ない方の主面が裏面１０ｂである。太陽電池１０は、裏面１０ｂ側に第１及び第２の電極の両方が設けられた裏面接合型の太陽電池であってもよいし、受光面１０ａに第１の電極が設けられており、裏面１０ｂに第２の電極が設けられた太陽電池であってもよい。   As shown in FIG. 1, the solar cell module 1 includes a solar cell 10. Specifically, the solar cell module 1 includes a plurality of solar cells 10 that are electrically connected by the wiring member 14. The solar cell 10 has a light receiving surface 10a and a back surface 10b. Here, the light receiving surface 10a is a main surface having a relatively large amount of received light among the pair of main surfaces, and a main surface having a relatively small amount of received light is the back surface 10b. The solar cell 10 may be a back junction solar cell in which both the first and second electrodes are provided on the back surface 10b side, or the first electrode is provided on the light receiving surface 10a. It may be a solar cell in which a second electrode is provided on 10b.

太陽電池１０の受光面１０ａ側には、第１の保護部材１２が配されている。太陽電池１０の裏面１０ｂ側には、第２の保護部材１３が設けられている。第１の保護部材１２と第２の保護部材１３との間には、封止材１１が設けられている。太陽電池１０は、この封止材１１により封止されている。なお、封止材１１は、例えば、架橋性樹脂により構成されていてもよいし、非架橋性樹脂により構成されていてもよい。封止材１１は、例えば、エチレン・酢酸ビニル共重合体（ＥＶＡ）やポリオレフィンなどにより構成することができる。   A first protection member 12 is disposed on the light receiving surface 10 a side of the solar cell 10. A second protective member 13 is provided on the back surface 10 b side of the solar cell 10. A sealing material 11 is provided between the first protective member 12 and the second protective member 13. The solar cell 10 is sealed with this sealing material 11. In addition, the sealing material 11 may be comprised by the crosslinkable resin, for example, and may be comprised by the non-crosslinkable resin. The sealing material 11 can be composed of, for example, ethylene / vinyl acetate copolymer (EVA), polyolefin, or the like.

図２に示されるように、第１の保護部材１２は、透光板２１と、充填部２２とを有する。透光板２１及び充填部２２は、それぞれ、太陽電池１０における光電変換に寄与する波長域の光の少なくとも一部を透過させる。透光板２１は、例えば、ガラス板、セラミック板、樹脂板等により構成することができる。   As shown in FIG. 2, the first protection member 12 includes a light transmitting plate 21 and a filling portion 22. The translucent plate 21 and the filling portion 22 each transmit at least part of light in a wavelength region that contributes to photoelectric conversion in the solar cell 10. The translucent plate 21 can be composed of, for example, a glass plate, a ceramic plate, a resin plate, or the like.

図２及び図３に示されるように、透光板２１の太陽電池１０とは反対側の主面２１ａは、凹凸２１ａ１を有する。凹凸２１ａ１は、どのような形状のものであってもよい。本実施形態では、凹凸２１ａ１は、具体的には、マトリクス状に配された角錐状の凹部により構成されている。より具体的には、凹凸２１ａ１は、マトリクス状に配された四角錐状の凹部により構成されている。もっとも、凹凸２１ａ１は、例えば、マトリクス状に配された角錐状の凹部により構成されていてもよい。   As shown in FIG. 2 and FIG. 3, the main surface 21 a on the opposite side of the light transmitting plate 21 from the solar cell 10 has irregularities 21 a 1. The unevenness 21a1 may have any shape. In the present embodiment, the irregularities 21a1 are specifically configured by pyramid-shaped concave portions arranged in a matrix. More specifically, the unevenness 21a1 is configured by quadrangular pyramid-shaped recesses arranged in a matrix. But the unevenness | corrugation 21a1 may be comprised by the pyramid-shaped recessed part distribute | arranged to the matrix form, for example.

このように、太陽電池モジュール１では、透光板２１の主面２１ａに凹凸２１ａ１が設けられているため、主面２１ａにおける光の反射率を低くすることができる。このため、太陽電池モジュール１への光の入射率を高めることができ、ひいては、太陽電池１０の受光効率を高めることができる。従って、優れた出力特性を実現することができる。   Thus, in the solar cell module 1, since the unevenness | corrugation 21a1 is provided in the main surface 21a of the translucent board 21, the reflectance of the light in the main surface 21a can be made low. For this reason, the incident rate of the light to the solar cell module 1 can be increased, and consequently the light receiving efficiency of the solar cell 10 can be increased. Therefore, excellent output characteristics can be realized.

また、太陽電池モジュール１では、凹凸２１ａ１の凹部に、透光板２１よりも屈折率が低い充填部２２が設けられており、主面２１ａの表面粗さが小さくされている。このため、凹凸２１ａ１の凹部にゴミ等が蓄積することにより、太陽電池モジュール１への光の入射率が低くなることが抑制されている。よって、太陽電池モジュール１では、出力特性の経時的な低下が抑制されている。   Moreover, in the solar cell module 1, the filling part 22 whose refractive index is lower than the translucent plate 21 is provided in the recessed part of the unevenness | corrugation 21a1, and the surface roughness of the main surface 21a is made small. For this reason, it is suppressed that the incident rate of the light to the solar cell module 1 becomes low because dust etc. accumulate | store in the recessed part of the unevenness | corrugation 21a1. Therefore, in the solar cell module 1, the output characteristics are prevented from decreasing with time.

より優れた出力特性を実現する観点からは、充填部２２の屈折率が、透光板２１の屈折率と空気の屈折率との間の値であることがより好ましい。例えば、透光板２１の屈折率が１．４〜１．７の範囲、充填部２２の屈折率が１．１〜１．４の範囲で、透光板２１と充填部２２との間で屈折率差が生じるように透光板２１の屈折率と充填部２２の屈折率とが選択されることが好ましい。   From the viewpoint of realizing more excellent output characteristics, it is more preferable that the refractive index of the filling portion 22 is a value between the refractive index of the translucent plate 21 and the refractive index of air. For example, when the refractive index of the translucent plate 21 is in the range of 1.4 to 1.7 and the refractive index of the filling portion 22 is in the range of 1.1 to 1.4, between the translucent plate 21 and the filling portion 22. It is preferable that the refractive index of the translucent plate 21 and the refractive index of the filling portion 22 are selected so that a difference in refractive index occurs.

また、さらに優れた出力特性を実現する観点からは、充填部２２の表面２２ａが凹状の曲面であることが好ましい。この場合、太陽電池モジュール１に対する垂直入射光の表面２２ａにおける光反射率を低減することができるため、さらに優れた出力特性を実現し得る。もっとも、充填部２２は、第１の保護部材１２の太陽電池１０とは反対側の表面が平坦となるように設けられていてもよい。この場合、凹凸２１ａ１の凹部にゴミが溜まることをより効果的に抑制することができる。   Further, from the viewpoint of realizing further excellent output characteristics, it is preferable that the surface 22a of the filling portion 22 is a concave curved surface. In this case, since the light reflectance at the surface 22a of the normal incident light with respect to the solar cell module 1 can be reduced, further excellent output characteristics can be realized. But the filling part 22 may be provided so that the surface on the opposite side to the solar cell 10 of the 1st protection member 12 may become flat. In this case, it is possible to more effectively suppress the accumulation of dust in the recesses of the unevenness 21a1.

なお、充填部２２は、例えば、ポーラスシリカやフッ素樹脂等により構成することができる。また、充填部２２は、透光板２１の主面２１ａの表面粗さを小さく平滑化するものであればよく、主面２１ａの凹凸２１ａ１を一部もしくは完全に覆うものであってもよい。   In addition, the filling part 22 can be comprised with porous silica, a fluororesin, etc., for example. Moreover, the filling part 22 should just be what smoothes the surface roughness of the main surface 21a of the translucent board 21 small, and may cover the unevenness | corrugation 21a1 of the main surface 21a partially or completely.

１…太陽電池モジュール
１０…太陽電池
１０ａ…受光面
１０ｂ…裏面
１１…封止材
１２…第１の保護部材
１３…第２の保護部材
２１…透光板
２１ａ…透光板の主面
２１ａ１…凹凸
２２…充填部
２２ａ…充填部の表面
DESCRIPTION OF SYMBOLS 1 ... Solar cell module 10 ... Solar cell 10a ... Light-receiving surface 10b ... Back surface 11 ... Sealing material 12 ... 1st protection member 13 ... 2nd protection member 21 ... Translucent plate 21a ... Main surface 21a1 of a translucent plate ... Concavity and convexity 22 ... filling portion 22a ... surface of filling portion

Claims (4)

太陽電池と、
前記太陽電池の受光面側に配された第１の保護部材と、
前記太陽電池の裏面側に配された第２の保護部材と、
前記第１の保護部材と前記第２の保護部材との間に配されており、太陽電池を封止する封止材と、
を備え、
前記第１の保護部材は、
前記太陽電池とは反対側の主面に凹凸を有する透光板と、
前記主面の凹部に配されており、前記透光板よりも屈折率が低い充填部と、
を有する、太陽電池モジュール。 Solar cells,
A first protective member disposed on the light receiving surface side of the solar cell;
A second protective member disposed on the back side of the solar cell;
A sealing material that is disposed between the first protective member and the second protective member and seals the solar cell;
With
The first protective member is
A translucent plate having irregularities on the main surface opposite to the solar cell;
Disposed in the concave portion of the main surface, a filling portion having a lower refractive index than the light-transmitting plate;
A solar cell module. 前記充填部は、前記主面の表面粗さが小さくなるように設けられている、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 filling portion is provided so that a surface roughness of the main surface is reduced. 前記主面に角錐状の凸部または角錐状の凹部がマトリクス状に設けられている、請求項１または２に記載の太陽電池モジュール。   The solar cell module according to claim 1 or 2, wherein pyramidal convex portions or pyramidal concave portions are provided in a matrix on the main surface. 前記充填部の表面が凹状の曲面である、請求項１〜３のいずれか一項に記載の太陽電池モジュール。   The solar cell module as described in any one of Claims 1-3 whose surface of the said filling part is a concave curved surface.
JP2012214386A 2012-09-27 2012-09-27 Solar cell module Pending JP2014072201A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870581A (en) * 1981-10-21 1983-04-27 Sharp Corp Solar battery device
JP2003188394A (en) * 2001-12-19 2003-07-04 Toppan Printing Co Ltd Film for solar cell and solar cell module
JP2012129296A (en) * 2010-12-14 2012-07-05 Toppan Printing Co Ltd Cover film for solar cell module and solar cell module
JP2012182160A (en) * 2011-02-28 2012-09-20 Ulvac Japan Ltd Antireflection body, solar battery, method for manufacturing antireflection body, and method for manufacturing solar battery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870581A (en) * 1981-10-21 1983-04-27 Sharp Corp Solar battery device
JP2003188394A (en) * 2001-12-19 2003-07-04 Toppan Printing Co Ltd Film for solar cell and solar cell module
JP2012129296A (en) * 2010-12-14 2012-07-05 Toppan Printing Co Ltd Cover film for solar cell module and solar cell module
JP2012182160A (en) * 2011-02-28 2012-09-20 Ulvac Japan Ltd Antireflection body, solar battery, method for manufacturing antireflection body, and method for manufacturing solar battery

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