WO2013140552A1 - Module de cellules solaires - Google Patents

Module de cellules solaires Download PDF

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Publication number
WO2013140552A1
WO2013140552A1 PCT/JP2012/057200 JP2012057200W WO2013140552A1 WO 2013140552 A1 WO2013140552 A1 WO 2013140552A1 JP 2012057200 W JP2012057200 W JP 2012057200W WO 2013140552 A1 WO2013140552 A1 WO 2013140552A1
Authority
WO
WIPO (PCT)
Prior art keywords
solar
tab
electrode
solar cell
cell module
Prior art date
Application number
PCT/JP2012/057200
Other languages
English (en)
Japanese (ja)
Inventor
幸弘 吉嶺
Original Assignee
三洋電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to PCT/JP2012/057200 priority Critical patent/WO2013140552A1/fr
Publication of WO2013140552A1 publication Critical patent/WO2013140552A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • 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

Definitions

  • the present invention relates to a solar cell module.
  • solar cells examples include single crystal solar cells, polycrystalline solar cells, amorphous solar cells, and the like, or combinations thereof. Usually, a plurality of solar cells are connected in series or in parallel and used as a solar cell module.
  • FIG. 12 shows a configuration of a conventional solar cell module 100.
  • the solar cell module 100 has a structure in which a plurality of solar cells 10 are connected by tabs 12.
  • the tab 12 connects the first electrode 14 of the solar battery cell 10 and the second electrode 16 of the adjacent solar battery cell 10.
  • the tab 12 has a bent portion 12 a provided with a step corresponding to the thickness of the solar battery cell 10.
  • the peripheral edge portion of the solar cell 10 and the tab 12 are brought into contact with each other and pressed (in the direction of the arrow in the figure), and the solar cell.
  • the cell 10 may be broken.
  • the space between the solar cells 10 is narrowed, the contact between the peripheral portion of the solar cell 10 and the tab 12 occurs, and the solar cell 10 may be damaged. is there.
  • One aspect of the present invention includes a plurality of solar cells including a photoelectric conversion unit, and a tab for electrically connecting the plurality of solar cells, and the photoelectric conversion unit and the tab are provided at the periphery of the solar cell.
  • a solar cell module in which a buffer material having a lower hardness than the photoelectric conversion portion is provided.
  • the present invention it is possible to suppress the occurrence of cracking of the solar battery cell and improve the reliability of the solar battery module.
  • the solar cell module 200 in the embodiment of the present invention includes a solar cell 20, a tab 22, a buffer material 24, a first protection member 26, and a second protection.
  • the member 28 and the filler 30 are included.
  • FIG. 1 is a plan view of the solar cell module 200 viewed from the light receiving surface side
  • FIG. 2 is a schematic cross-sectional view taken along line AA in FIG.
  • the “light receiving surface” is one of the main surfaces of the solar battery cell 20 and means a surface on which light from the outside is mainly incident. For example, 50% to 100% of the light incident on the solar battery cell 20 enters from the light receiving surface side.
  • the “back surface” is one of the main surfaces of the solar battery cell 20 and means a surface opposite to the light receiving surface.
  • the solar battery cell 20 receives light such as sunlight to generate carriers (electrons and holes), a first electrode 20b provided on the light receiving surface of the photoelectric conversion unit 20a, And a second electrode 20c provided on the back surface of the photoelectric conversion unit 20a.
  • the first electrode 20 b and the second electrode 20 c include fingers provided in a comb shape so as to intersect the extending direction of the tab 22 and bus bars connecting the fingers.
  • the bus bars are electrodes that connect the fingers, and are arranged in parallel to each other at a predetermined interval so as to cover the tabs 22.
  • the fingers and bus bars are formed, for example, by screen-printing a conductive paste in which a conductive filler such as silver (Ag) is dispersed in a binder resin in a desired pattern on a transparent conductive layer.
  • a metal film such as a silver (Ag) thin film may be formed on substantially the entire back surface of the photoelectric conversion unit 20a to form the second electrode 20c.
  • carriers generated by the photoelectric conversion unit 20 a are collected by the first electrode 20 b and the second electrode 20 c.
  • the photoelectric conversion unit 20a includes a substrate made of a semiconductor material such as crystalline silicon, gallium arsenide (GaAs), or indium phosphorus (InP).
  • the structure of the photoelectric conversion unit 20a is not particularly limited, but in the present embodiment, it will be described as a structure having a heterojunction of an n-type single crystal silicon substrate and amorphous silicon.
  • the photoelectric conversion unit 20a includes, for example, an i-type amorphous silicon layer, a p-type amorphous silicon layer doped with boron (B) or the like on a light-receiving surface of an n-type single crystal silicon substrate, indium oxide or the like.
  • the transparent conductive layers made of a photoconductive oxide are stacked in this order.
  • an i-type amorphous silicon layer, an n-type amorphous silicon layer doped with phosphorus (P) or the like, and a transparent conductive layer are laminated in this order.
  • the adjacent solar battery cells 20 are connected by a tab 22.
  • a metal foil such as copper can be used.
  • the tab 22 connects the first electrode 20b of the solar battery cell 20 and the second electrode 20c of the adjacent solar battery cell 20.
  • the tab 22 is bonded to, for example, the bus bar of the first electrode 20b of one solar battery cell 20 and the bus bar of the second electrode 20c of the other solar battery cell 20 by an adhesive layer.
  • the adhesive layer for example, a conductive adhesive film in which conductive particles are dispersed in a thermosetting adhesive layer containing an adhesive resin material such as an epoxy resin, an acrylic resin, or a urethane resin can be used.
  • the conductive adhesive film may use an anisotropic conductive adhesive layer having high conductivity in the in-plane direction of the solar battery cell 20 and low conductivity in the film thickness direction.
  • a paste containing no conductive particles may be used for a thermosetting adhesive layer made of an adhesive resin material such as an epoxy resin, an acrylic resin, or a urethane resin.
  • the tab 22 has a bent portion 22 a provided with a step corresponding to the thickness of the solar battery cell 20.
  • the bent portion 22a has a structural escape corresponding to the thickness of the solar battery cell 20 in order to connect the first electrode 20b and the second electrode 20c so that the adjacent solar battery cells 20 are arranged in the same plane. It is provided to be formed.
  • the first protective member 26 is a member provided to protect the light receiving surface side of the solar battery cell 20. Since the 1st protection member 26 is provided in the light-receiving surface side of the photovoltaic cell 20, it is comprised from the transparent member which permeate
  • the second protection member 28 is a member provided to protect the back side of the solar battery cell 20. As the second protective member 28, a glass plate, a resin plate, a resin film, or the like can be used as in the first protective member 26.
  • the second protective member 28 may be an opaque plate or film.
  • a laminated film such as a resin film having an aluminum foil or the like inside may be used.
  • the first protective member 26 and the second protective member 28 are bonded to the first electrode 20 b and the second electrode 20 c of the solar battery cell 20 using the filler 30, respectively.
  • a buffer material 24 is provided between the tab 20 and the peripheral edge of the solar cell 20. It is preferable that the buffer material 24 is provided between the photoelectric conversion unit 20 a and the tab 22 in a region where the first electrode 20 b and the second electrode 20 c are not provided in the peripheral portion of the solar battery cell 20.
  • the buffer material 24 is provided in order to buffer the force applied to the solar battery cell 20 when the tab 22 contacts the solar battery cell 20 at the peripheral edge of the solar battery cell 20. Therefore, it is preferable that the buffer material 24 is made of a material having a hardness lower than that of the photoelectric conversion unit 20a of the solar battery cell 20, that is, softer than the photoelectric conversion unit 20a.
  • the buffer material 24 is preferably a resin material such as an epoxy resin, an acrylic resin, or a urethane resin.
  • a resin material such as an epoxy resin, an acrylic resin, or a urethane resin.
  • an adhesive layer used for adhering the first electrode 20 b or the second electrode 20 c and the tab 22 may be used as the buffer material 24.
  • the thickness of the buffer material 24 is preferably 5 ⁇ m or more and 100 ⁇ m or less. By setting it as such a film thickness, the pressure which the photovoltaic cell 20 receives from the tab 22 can be relieve
  • the buffer material 24 is preferably provided so as not to protrude from the region covered with the tab 22 of the main surface (light receiving surface and back surface) of the solar battery cell 20.
  • the buffer material 24 so as not to protrude from the tab 22, it is possible to prevent the light incident on the photoelectric conversion unit 20 a from being blocked by the buffer material 24, and to suppress a decrease in power generation efficiency in the solar battery cell 20. be able to.
  • the buffer material 24 is provided so as to protrude from the region covered with the tab 22, it is preferable to use a transparent material that transmits light in a wavelength band used for photoelectric conversion in the solar battery cell 20. Thereby, it can prevent that the light which injects into the photoelectric conversion part 20a by the buffer material 24 is shielded.
  • the buffer material 24 on the back surface side may protrude from the region covered with the tab 22.
  • the cushioning material 24 may be disposed over the entire width direction of the tab 22 (direction perpendicular to the extending direction), or the cushioning material 24 may be disposed only in a part of the tab 22 in the width direction.
  • the tab 22 By providing the buffer material 24 over the entire width of the tab 22, the tab 22 can be prevented from coming into direct contact with the solar battery cell 20 at any location in the width direction of the tab 22.
  • the force applied to 20 can be reliably relaxed.
  • the buffer material 24 is provided only in a part of the tab 22 in the width direction, the amount of the material used for the buffer material 24 can be reduced.
  • the cushioning material 24 extends from the surface covered by the tab 22 at the peripheral edge of the solar cell 20 to the main surface on the opposite side of the solar cell 20 through the side surface of the solar cell 20. It may be provided so as to cover the part. However, as shown in FIG. 2, the cushioning material 24 is provided from the main surface side covered by the tab 22 at the peripheral edge portion of the solar battery cell 20 to the end side surface, and the sun facing the region where the cushioning material 24 is provided. It is preferable that it is not provided in the region of the main surface on the opposite side of the battery cell 20.
  • the amount of the material used for the buffer material 24 can be reduced.
  • An area covered by the tab 22 is an area where the tab 22 and the solar battery cell 20 may be in contact with each other. Therefore, it is possible to substantially avoid the tab 22 from coming into direct contact with the solar battery cell 20 by providing the buffer material 24 at least in the region. As a result, the effect of buffering the force applied to the solar battery cell 20 from the tab 22 is maintained, and damage to the solar battery cell 20 can be prevented.
  • the buffer material 24 may be provided from a position away from the first electrode 20b (or the second electrode 20c), or as shown in FIGS. 4 and 5, the first electrode 20b.
  • the buffer material 24 may be provided from a position in contact with (or the second electrode 20c).
  • the cushioning material 24 By providing the cushioning material 24 from a position away from the first electrode 20b (or the second electrode 20c), the amount of material used for the cushioning material 24 can be reduced. On the other hand, by providing the buffer material 24 from the position in contact with the first electrode 20b (or the second electrode 20c), the sun is surely spread from the position in contact with the first electrode 20b (or the second electrode 20c) to the entire end portion. The battery cell 20 can be protected.
  • the buffer material 24 may have a shape along the shape of the end portion of the solar battery cell 20 as shown in FIGS. 2 to 5, or may have a fillet shape as shown in FIGS. .
  • the fillet shape indicates a rounded shape.
  • the fillet shape has a curvature larger than the curvature of the corner formed by the main surface (light receiving surface or back surface) and the end surface of the solar battery cell 20. It means that it has a shape.
  • the tab 22 comes into contact with the cushioning material 24 in a wider area, and the pressure transmitted from the tab 22 to the solar battery cell 20 via the cushioning material 24 is increased. It can be dispersed more widely. Therefore, the solar battery cell 20 can be more reliably protected.
  • the solar battery cell 20 can be formed by applying a conventional forming method, and therefore, the forming method of the tab 22 and the buffer material 24 which are characteristic parts will be described.
  • the buffer material 24 is formed of a material that becomes the buffer material 24 such as a resin. Apply to the area to be applied.
  • a conductive adhesive film serving as an adhesive layer is disposed on the bus bar of the first electrode 20b and the second electrode 20c, and the tab 22 is bonded to the bus bar.
  • FIG.8 (c) it seals with the 1st protection member 26, the 2nd protection member 28, and the filler 30.
  • a resin paste 32 as an adhesive layer for adhering the tab 22 is disposed on the first electrode 20b and the second electrode 20c, and as shown in FIG.
  • the resin paste 32 may protrude from the peripheral portion of the solar battery cell 20 and the portion may be used as the buffer material 24.
  • the resin paste 32 may be an insulating adhesive layer that does not contain a conductive material. In this case, when the tab 22 is pressure-bonded to the first electrode 20b and the second electrode 20c, the resin paste 32 protrudes from the side surfaces of the first electrode 20b and the second electrode 20c.
  • the tab 22 is in direct contact with and electrically connected to the first electrode 20b and the second electrode 20c. And as shown in FIG.9 (c), it seals with the 1st protection member 26, the 2nd protection member 28, and the filler 30.
  • FIG.9 (c) shows that the tab 22 is in direct contact with and electrically connected to the first electrode 20b and the second electrode 20c. And as shown in FIG.9 (c), it seals with the 1st protection member 26, the 2nd protection member 28, and the filler 30.
  • the conductive adhesive film 34 is pasted from the first electrode 20b and the second electrode 20c to the periphery of the solar battery cell 20, and the tab 22 is attached to the first electrode 20b. It is good also as a process crimped
  • the conductive adhesive film 34 at the peripheral edge of the solar battery cell 20 functions as the buffer material 24.
  • the conductive adhesive film to be the buffer material 24 in the final structure may be in a state of hanging from the end of the solar battery cell 20.
  • the solar cell module 200 of the present embodiment by providing the buffer material 24, the occurrence of cracks and the like of the solar cells 20 is suppressed, and the reliability of the solar cell module 200 is improved. Can do.

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente invention se rapporte à un module de cellules solaires qui est pourvu d'une pluralité de cellules solaires, chacune d'elles comprenant une unité de conversion photoélectrique, et d'une languette qui raccorde électriquement la pluralité de cellules solaires. Dans la partie périphérique de chaque cellule solaire, un matériau tampon, qui présente une dureté inférieure à celle de l'unité de conversion photoélectrique, est placé entre l'unité de conversion photoélectrique et la languette.
PCT/JP2012/057200 2012-03-21 2012-03-21 Module de cellules solaires WO2013140552A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/057200 WO2013140552A1 (fr) 2012-03-21 2012-03-21 Module de cellules solaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/057200 WO2013140552A1 (fr) 2012-03-21 2012-03-21 Module de cellules solaires

Publications (1)

Publication Number Publication Date
WO2013140552A1 true WO2013140552A1 (fr) 2013-09-26

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014175520A (ja) * 2013-03-11 2014-09-22 Mitsubishi Electric Corp 太陽電池モジュ−ル及びその製造方法
WO2014208312A1 (fr) * 2013-06-28 2014-12-31 三洋電機株式会社 Module de cellule de batterie solaire et procédé pour sa fabrication
WO2015064696A1 (fr) * 2013-10-30 2015-05-07 京セラ株式会社 Cellule solaire et module de cellules solaires
WO2020189240A1 (fr) * 2019-03-20 2020-09-24 株式会社カネカ Module de batterie solaire et procédé de fabrication de module de batterie solaire
CN112216752A (zh) * 2019-07-09 2021-01-12 苏州阿特斯阳光电力科技有限公司 光伏组件的制造方法
JP2021111736A (ja) * 2020-01-15 2021-08-02 株式会社カネカ 太陽電池モジュール

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01293671A (ja) * 1988-05-23 1989-11-27 Mitsubishi Electric Corp 太陽電池装置
JPH11186572A (ja) * 1997-12-22 1999-07-09 Canon Inc 光起電力素子モジュール
JP2003069055A (ja) * 2001-06-13 2003-03-07 Sharp Corp 太陽電池セルとその製造方法
JP2004111952A (ja) * 2002-08-29 2004-04-08 Nippon Sheet Glass Co Ltd 合わせガラスとその製造方法
JP2005129773A (ja) * 2003-10-24 2005-05-19 Kyocera Corp 太陽電池モジュールおよび太陽電池素子の接続用配線

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01293671A (ja) * 1988-05-23 1989-11-27 Mitsubishi Electric Corp 太陽電池装置
JPH11186572A (ja) * 1997-12-22 1999-07-09 Canon Inc 光起電力素子モジュール
JP2003069055A (ja) * 2001-06-13 2003-03-07 Sharp Corp 太陽電池セルとその製造方法
JP2004111952A (ja) * 2002-08-29 2004-04-08 Nippon Sheet Glass Co Ltd 合わせガラスとその製造方法
JP2005129773A (ja) * 2003-10-24 2005-05-19 Kyocera Corp 太陽電池モジュールおよび太陽電池素子の接続用配線

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014175520A (ja) * 2013-03-11 2014-09-22 Mitsubishi Electric Corp 太陽電池モジュ−ル及びその製造方法
WO2014208312A1 (fr) * 2013-06-28 2014-12-31 三洋電機株式会社 Module de cellule de batterie solaire et procédé pour sa fabrication
JPWO2014208312A1 (ja) * 2013-06-28 2017-02-23 パナソニックＩｐマネジメント株式会社 太陽電池モジュール及びその製造方法
WO2015064696A1 (fr) * 2013-10-30 2015-05-07 京セラ株式会社 Cellule solaire et module de cellules solaires
JPWO2015064696A1 (ja) * 2013-10-30 2017-03-09 京セラ株式会社 太陽電池セルおよび太陽電池モジュール
US9608140B2 (en) 2013-10-30 2017-03-28 Kyocera Corporation Solar cell and solar cell module
WO2020189240A1 (fr) * 2019-03-20 2020-09-24 株式会社カネカ Module de batterie solaire et procédé de fabrication de module de batterie solaire
JP7471273B2 (ja) 2019-03-20 2024-04-19 株式会社カネカ 太陽電池モジュール及び太陽電池モジュールの製造方法
CN112216752A (zh) * 2019-07-09 2021-01-12 苏州阿特斯阳光电力科技有限公司 光伏组件的制造方法
JP2021111736A (ja) * 2020-01-15 2021-08-02 株式会社カネカ 太陽電池モジュール
JP7483382B2 (ja) 2020-01-15 2024-05-15 株式会社カネカ 太陽電池モジュール

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