WO2013018533A1 - Module de piles solaires - Google Patents
Module de piles solaires Download PDFInfo
- Publication number
- WO2013018533A1 WO2013018533A1 PCT/JP2012/068064 JP2012068064W WO2013018533A1 WO 2013018533 A1 WO2013018533 A1 WO 2013018533A1 JP 2012068064 W JP2012068064 W JP 2012068064W WO 2013018533 A1 WO2013018533 A1 WO 2013018533A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solar cell
- wiring material
- cell module
- curved portion
- module according
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 70
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 238000000576 coating method Methods 0.000 claims abstract description 31
- 238000004070 electrodeposition Methods 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 claims 1
- 229920000178 Acrylic resin Polymers 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 claims 1
- 229920006122 polyamide resin Polymers 0.000 claims 1
- 229920000647 polyepoxide Polymers 0.000 claims 1
- 239000009719 polyimide resin Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 9
- 238000012986 modification Methods 0.000 description 16
- 230000004048 modification Effects 0.000 description 16
- 229920005989 resin Polymers 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- 239000000758 substrate Substances 0.000 description 5
- 239000011888 foil Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H01L31/0508—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 the interconnection means having a particular shape
-
- 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.
- Patent Document 1 describes a solar cell module including a plurality of back junction solar cells electrically connected by a wiring material.
- An object of the present invention is to provide a solar cell module in which the photoelectric conversion efficiency is unlikely to decrease with time.
- the solar cell module according to the present invention includes a plurality of solar cells and a wiring material.
- the wiring material electrically connects adjacent solar cells.
- the wiring material has a wiring material main body and a connection part.
- the wiring material body is not electrically connected directly to the solar cell.
- the connecting portion is connected to the wiring material body.
- the connection part is electrically connected directly to the solar cell.
- the solar cell module according to the present invention further includes an insulating coating film.
- the insulating coating film covers at least a part of the surface of the wiring material body.
- FIG. 1 is a schematic cross-sectional view of a solar cell module according to an embodiment of the present invention.
- FIG. 2 is a schematic back view of a solar cell in one embodiment of the present invention.
- FIG. 3 is a schematic back view of a solar cell string according to an embodiment of the present invention. In FIG. 3, although the part in which the coating film is formed is hatched, the part to which the hatching is attached does not represent a cross section.
- 4 is a schematic cross-sectional view taken along line IV-IV in FIG.
- FIG. 5 is a schematic cross-sectional view taken along line VV in FIG.
- FIG. 6 is a schematic rear view of a solar cell string in a modified example.
- FIG. 1 is a schematic cross-sectional view of a solar cell module according to an embodiment of the present invention.
- FIG. 2 is a schematic back view of a solar cell in one embodiment of the present invention.
- FIG. 3 is a schematic back view of a solar cell string according to an embodiment of
- FIG. 7 is a schematic plan view of the wiring member in the second modification.
- FIG. 8 is a schematic plan view of the wiring member in the third modification.
- FIG. 9 is a schematic plan view of a wiring member according to a fourth modification.
- FIG. 10 is a schematic plan view of the wiring member in the fifth modification.
- FIG. 11 is a schematic plan view of a wiring member according to a sixth modification.
- FIG. 1 is a schematic cross-sectional view of a solar cell module 1 according to this embodiment.
- the solar cell module 1 includes a solar cell string 10.
- the solar cell string 10 is disposed between the first protection member 11 located on the light receiving surface side and the second protection member 12 located on the back surface side.
- a filler layer 13 is provided between the first protective member 11 and the second protective member 12.
- the solar cell string 10 is sealed with a filler layer 13.
- the first protective member 11 can be made of a translucent member such as a glass substrate or a resin substrate, for example.
- the second protective member 12 can be constituted by, for example, a resin sheet, a resin sheet with a metal foil interposed therebetween, a glass substrate, a resin substrate, or the like.
- the filler layer 13 can be made of, for example, a resin such as ethylene / vinyl acetate copolymer (EVA), polyvinyl butyral (PVB), polyethylene (PE), polyurethane (PU), or the like.
- EVA ethylene / vinyl acetate copolymer
- PVB polyvinyl butyral
- PE polyethylene
- PU polyurethane
- the solar cell string 10 is configured by arranging wiring members 30 between a plurality of solar cells 20 along the x direction (first direction).
- the solar cell 20 has first and second main surfaces 20a and 20b. Solar cell 20 receives light on first main surface 20a. For this reason, the 1st main surface 20a may be called a light-receiving surface, and the 2nd main surface 20b may be called a back surface.
- the solar cell 20 may receive light only on the first main surface 20a constituting the light receiving surface and generate power, or can receive light on any of the first and second main surfaces 20a, 20b.
- a double-sided light receiving type that generates electricity may be used.
- the type of the solar cell 20 is not particularly limited.
- the solar cell 20 can be constituted by, for example, a crystalline silicon solar cell using a crystalline silicon substrate.
- FIG. 2 shows a schematic rear view of the solar cell 20.
- the solar cell 20 includes first and second electrodes 21 and 22 on the second main surface 20b side.
- the solar cell 20 includes a photoelectric conversion unit 23 and first and second electrodes 21 and 22 disposed on the main surface on the back surface side of the photoelectric conversion unit 23.
- Each of the first and second electrodes 21 and 22 is provided in a comb shape.
- the first electrode 21 and the second electrode 22 are arranged so that comb teeth are alternately arranged.
- each of the first and second electrodes 21 and 22 has a plurality of finger portions 21a and 22a and bus bar portions 21b and 22b.
- Each of the plurality of finger portions 21a and 22a extends along the x direction.
- the plurality of finger portions 21a and 22a are spaced apart from each other along the y-th direction (2 direction) perpendicular to the x direction.
- the plurality of finger portions 21a are electrically connected to the bus bar portion 21b.
- the bus bar portion 21b is disposed on one side in the x direction of the plurality of finger portions 21a.
- the bus bar portion 21b is provided at one end portion in the x direction of the solar cell 20 from one end portion in the y direction to the other end portion.
- the plurality of finger portions 22a are electrically connected to the bus bar portion 22b.
- the bus bar portion 22b is disposed on the other side in the x direction of the plurality of finger portions 22a.
- the bus bar portion 22b is provided from one end portion in the y direction to the other end portion in the other end portion in the x direction of the solar cell 20.
- the plurality of solar cells 20 are electrically connected by a wiring member 30.
- the first electrode 21 of one solar cell 20 of the solar cells 20 adjacent in the x direction and the second electrode 22 of the other solar cell are electrically connected by the wiring member 30.
- the wiring member 30 and the second main surface 20b of the solar cell 20 are bonded by an adhesive layer 40 shown in FIG.
- the adhesive layer 40 can be composed of, for example, a cured product of solder or resin adhesive.
- the wiring member 30 can be made of, for example, a metal foil such as Ag or Cu, a laminate of metal foils, or a metal foil whose surface is covered with solder or the like.
- the wiring member 30 includes a wiring member main body 32 and a plurality of connection portions 31.
- the wiring material main body 32 is not directly bonded to the solar cell 20 and is not directly electrically connected to the solar cell 20.
- the wiring material body 32 has an elongated shape extending along the y direction perpendicular to the x direction.
- the wiring material body 32 is provided in a substantially linear shape.
- the wiring material main body 32 is provided from one end in the y direction of the solar cell 20 to the other end.
- connection portion 31 are arranged at intervals in the y direction.
- the connection portion 31 is connected to the wiring material body 32.
- the connection portion 31 is bonded to the second main surface 20b of the solar cell 20 with the adhesive layer 40, and is electrically connected directly to the solar cell 20.
- At least a part of the surface of the wiring material body 32 is covered with an insulating coating film 33.
- substantially the entire surface including the first and second main surfaces and side surfaces of the wiring material main body 32 is covered with the insulating coating film 33.
- the coating film 33 does not cover the surface of the connection portion 31.
- the coating film 33 is composed of an electrodeposition coating film formed by electrodeposition coating.
- the constituent material of the coating film 33 is not particularly limited as long as it is an insulating material.
- the coating film 33 was selected from the group consisting of, for example, phenolic resin (PF) such as novolac resin, polyamide (PA) resin, polyimide (PI) resin, acrylic (PMMA) resin, epoxy (EP) resin, and urethane resin. It is preferable to consist of at least one.
- the thermal expansion coefficient differs between the solar cell and the wiring material. For this reason, when the temperature of the solar cell module changes, stress is applied to the solar cell and the wiring material, thereby changing the relative positional relationship between adjacent solar cells electrically connected by the wiring material and the wiring material. There is a case. Thereby, the part which was not directly electrically connected to the solar cell of a wiring material may contact a solar cell, and there exists a possibility that a short circuit may arise.
- the present embodiment at least a part of the surface of the wiring material main body 32 is covered with the insulating coating film 33. For this reason, even if the relative positional relationship between the adjacent solar cells and the wiring material changes, the portion of the wiring material 30 that is not electrically connected directly to the solar cell 20 directly contacts the solar cell 20. To be suppressed. Therefore, a decrease in photoelectric conversion efficiency due to a short circuit can be suppressed. As a result, a decrease in the photoelectric conversion efficiency of the solar cell module 1 with time can be suppressed.
- the heat resistance of the wiring material 30 can be improved.
- the coating film 33 is composed of an electrodeposition coating film, the heat resistance is more effectively improved.
- a method of applying an insulating tape to the wiring material body is also conceivable.
- the tape is attached to the wiring material body, the expansion and contraction of the wiring material is hindered by the tape.
- a big stress is added to a wiring material and a solar cell. Therefore, a big curvature generate
- the stretchability of the wiring material 30 is less likely to be lower than when a tape is applied. Therefore, even when the temperature of the solar cell module 1 changes and a difference in thermal expansion occurs between the wiring member 30 and the solar cell 20, the wiring member 30 and the solar cell are expanded and contracted by the wiring member 30. The stress applied to 20 can be relaxed. Therefore, it is possible to suppress the warpage of the solar cell 20 or the separation of the wiring member 30 from the solar cell 20.
- the wiring material is not particularly limited as long as it has a wiring material main body and a connecting portion.
- the wiring member may have a structure as shown in FIG.
- the portion located between adjacent connection portions 31 in the y direction of the wiring material body 32 is in the y direction perpendicular to the x direction, which is the arrangement direction of the solar cells 20. It includes curved portions 32a to 32h extending in a direction inclined with respect to it. Specifically, openings 34 a to 34 d are provided in the wiring material body 32. As a result, there are provided curved portions 32a to 32h constituted by at least one of at least one bent portion and at least one curved portion extending in a direction inclined with respect to the y direction which is a direction in which the wiring material body 32 extends. Yes.
- the curved portions 32a to 32h are excellent in stretchability.
- the stress applied to the wiring member 30 and the solar cell 20 is effectively relieved by appropriately expanding and contracting the curved portions 32a to 32h.
- curved portions 32a to 32h are provided on both sides of the connecting portion 31 in the y direction. For this reason, the stress added to the wiring material 30 and the solar cell 20 is relieved more effectively.
- the openings 34a to 34d have shapes that do not have corners in their outlines.
- the opening 34b is preferably provided in a circular shape, an elliptical shape in which the major axis or the minor axis is in the y direction, or an ellipse shape in which the major axis or the minor axis is in the y direction.
- the wiring material main body 32 and the solar cell 20 are in direct contact with each other.
- the short circuit by this is suppressed.
- the coating film 33 is difficult to prevent the expansion and contraction of the wiring material body 32, particularly the expansion and contraction of the curved portions 32a to 32h.
- the applied stress can be relaxed more effectively. As a result, it is possible to effectively suppress the wiring material 30 from being peeled off from the solar cell 20 or the solar cell 20 being warped.
- connection portion 31 may have a shape with a rounded tip portion extending in the x direction.
- the coating film 33 may not be provided on the surfaces of the curved portions 32a to 32h.
- FIG. 7 is a schematic plan view of the wiring member in the second modification.
- one curved portion (specifically, a curved portion) 32c is provided in each part of the portion located between the connection portions 31 adjacent in the y direction of the wiring member main body 32.
- FIG. 8 is a schematic plan view of the wiring material in the third modification.
- a curved portion 32d including a plurality of bent portions is provided in each part of the portion located between the connecting portions 31 adjacent in the y direction of the wiring member main body 32.
- FIG. 9 is a schematic plan view of the wiring material in the fourth modified example.
- FIG. 10 is a schematic plan view of the wiring member in the fifth modification.
- FIG. 11 is a schematic plan view of a wiring member according to a sixth modification.
- substantially the entire portion of the wiring member main body 32 located between the adjacent connection portions 31 in the y direction is constituted by a curved portion.
- substantially the entire portion located between the connecting portions 31 adjacent in the y direction of the wiring member main body 32 is composed of a curved portion constituted by a plurality of curved portions.
- substantially the entire portion located between the connecting portions 31 adjacent in the y direction of the wiring member main body 32 is composed of a curved portion constituted by one curved portion.
- a set of curved portions (specifically, substantially all of the portions located between the connection portions 31 adjacent in the y direction of the wiring material body 32 face each other and protrude in the opposite direction) Are curved portions) 32e and 32f. Even in such a case, the stress applied to the solar cell 20 and the wiring member 30 can be relieved because the curved portion can be expanded and contracted. Therefore, a solar cell module having improved reliability can be realized.
- the opening defined by the first and second curved portions may be, for example, an elliptical shape or an elliptical shape in which the major axis or the minor axis faces the second direction.
- the present invention includes various embodiments not described herein.
- at least one of the first and second electrodes may be a so-called bus bar-less electrode that does not have a bus bar portion and is configured by a plurality of finger portions. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- 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)
- Photovoltaic Devices (AREA)
Abstract
La présente invention concerne un module de piles solaires dans lequel une efficacité de conversion photoélectrique ne se dégrade pas facilement avec le temps.
Un module de piles solaires (1) est doté d'une pluralité de piles solaires (20) et d'un matériau de câblage (30). Le matériau de câblage (30) connecte électriquement les piles solaires adjacentes (20) entre elles. Le matériau de câblage (30) possède un corps principal de matériau de câblage (32) et des sections de connexion (31). Le corps principal de matériau de câblage (32) n'est pas directement connecté électriquement aux piles solaires (20). Les sections de connexion (31) sont connectées au corps principal de matériau de câblage (32). Les sections de connexion (31) sont directement connectées électriquement aux piles solaires (20). Le module de piles solaires (1) est également doté d'un film de revêtement isolant (33). Le film de revêtement isolant (33) recouvre au moins une partie de la surface du corps principal de matériau de câblage (32).
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2011166416 | 2011-07-29 | ||
JP2011166415 | 2011-07-29 | ||
JP2011-166416 | 2011-07-29 | ||
JP2011-166415 | 2011-07-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013018533A1 true WO2013018533A1 (fr) | 2013-02-07 |
Family
ID=47629062
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/068064 WO2013018533A1 (fr) | 2011-07-29 | 2012-07-17 | Module de piles solaires |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPWO2013018533A1 (fr) |
WO (1) | WO2013018533A1 (fr) |
Cited By (16)
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KR20150065042A (ko) * | 2013-12-04 | 2015-06-12 | 엘지전자 주식회사 | 후면 접합 태양전지 및 이를 구비한 태양전지 모듈 |
KR20150083746A (ko) * | 2014-01-10 | 2015-07-20 | 엘지전자 주식회사 | 인터커넥터 및 이를 구비한 태양전지 모듈 |
KR20150084326A (ko) * | 2014-01-13 | 2015-07-22 | 엘지전자 주식회사 | 태양전지 모듈 |
JP2017017270A (ja) * | 2015-07-06 | 2017-01-19 | 株式会社豊田自動織機 | インターコネクタ及びソーラーパネル |
JP2017069249A (ja) * | 2015-09-28 | 2017-04-06 | 株式会社豊田自動織機 | インターコネクタ及びソーラーパネル |
JP2017117946A (ja) * | 2015-12-24 | 2017-06-29 | トヨタ自動車株式会社 | 太陽電池モジュール |
KR20170095175A (ko) * | 2017-08-09 | 2017-08-22 | 엘지전자 주식회사 | 태양 전지 및 태양 전지 모듈 |
KR20180012868A (ko) * | 2015-06-25 | 2018-02-06 | 선파워 코포레이션 | 태양 전지용 1차원 금속화 |
JP2018026380A (ja) * | 2016-08-08 | 2018-02-15 | 株式会社豊田自動織機 | インターコネクタ及びソーラーパネル |
JP2018098317A (ja) * | 2016-12-12 | 2018-06-21 | 株式会社豊田自動織機 | 太陽電池モジュールおよび導電体 |
WO2018116643A1 (fr) * | 2016-12-20 | 2018-06-28 | パナソニックIpマネジメント株式会社 | Module de cellules solaires et procédé de fabrication de module de cellules solaires |
JP2018113440A (ja) * | 2017-01-11 | 2018-07-19 | エルジー エレクトロニクス インコーポレイティド | 太陽電池モジュール及びそれを備える携帯用充電器 |
JP2019096787A (ja) * | 2017-11-24 | 2019-06-20 | 株式会社豊田自動織機 | ソーラーパネル |
JP2019519119A (ja) * | 2016-06-24 | 2019-07-04 | マーリン・ソーラー・テクノロジーズ・インコーポレイテッドMerlin Solar Technologies, Inc. | セル間配線 |
US10658535B2 (en) | 2017-01-13 | 2020-05-19 | Kabushiki Kaisha Toyota Jidoshokki | Solar cell module and method of manufacturing the same |
US20200259031A1 (en) * | 2014-11-26 | 2020-08-13 | Sunpower Corporation | Solar module interconnect |
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CN114122179B (zh) * | 2022-01-25 | 2022-09-16 | 浙江爱旭太阳能科技有限公司 | 叉指背接触电池串、叉指背接触电池组件以及系统 |
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