US20140202518A1 - Solar module - Google Patents

Solar module Download PDF

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Publication number
US20140202518A1
US20140202518A1 US14/222,043 US201414222043A US2014202518A1 US 20140202518 A1 US20140202518 A1 US 20140202518A1 US 201414222043 A US201414222043 A US 201414222043A US 2014202518 A1 US2014202518 A1 US 2014202518A1
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US
United States
Prior art keywords
wiring
solar cell
electrode
solar
wiring member
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US14/222,043
Other languages
English (en)
Inventor
Tomonori TABE
Yoshiyuki Kudo
Yosuke Ishii
Ryota Morikawa
Shuji Fukumochi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Assigned to SANYO ELECTRIC CO., LTD. reassignment SANYO ELECTRIC CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUDO, YOSHIYUKI, MORIKAWA, RYOTA, TABE, TOMONORI, FUKUMOCHI, SHUJI, ISHII, YOSUKE
Publication of US20140202518A1 publication Critical patent/US20140202518A1/en
Assigned to PANASONIC CORPORATION reassignment PANASONIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SANYO ELECTRIC CO., LTD.
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. reassignment PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PANASONIC CORPORATION
Abandoned legal-status Critical Current

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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
    • H01L31/05—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
    • 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
    • H01L31/02—Details
    • H01L31/02002—Arrangements for conducting electric current to or from the device in operations
    • H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
    • H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
    • H01L31/0201—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising specially adapted module bus-bar structures
    • 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
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
    • 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
    • H01L31/0512—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 made of a particular material or composition of materials
    • 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
    • H01L31/0516—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 specially adapted for interconnection of back-contact solar cells
    • 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 module.
  • Solar modules having back contact solar cells are known to be solar modules with better photoelectric conversion efficiency.
  • An example is described in Patent Document 1.
  • the solar module described in Patent Document 1 includes a plurality of back contact solar cells, and a circuit board with wiring arranged on the surface.
  • the solar cells are installed in one direction on the circuit board with the back surface sides of the solar cells facing the circuit board, and are connected electrically to the circuit board.
  • the circuit board is bent in the direction opposite the solar cells to the outside of the area in which the solar module is provided.
  • Patent Document 1 Laid-Open Patent Publication No. 2009-43842
  • the solar module in the present invention includes a solar cell and a wiring member.
  • the solar cell has a photoelectric conversion unit, a first electrode, and a second electrode.
  • the photoelectric conversion unit has a first main surface and a second main surface.
  • the first electrode and the second electrode are arranged on the second main surface.
  • the wiring member has resin film and wiring.
  • the wiring is arranged on the resin film.
  • the wiring is connected electrically to the first electrode and the second electrode.
  • the wiring member has a first portion, a second portion, and a bent portion.
  • the first portion is arranged so that the wiring faces the solar cell side.
  • the first portion is bonded to the solar cell.
  • the second portion is arranged so that the wiring is facing the reverse side from the solar cell.
  • the bent portion is connected to the first portion and the second portion.
  • the bent portion is arranged on the solar cell.
  • the present invention is able to provide a solar module with improved output characteristics.
  • FIG. 1 is a simplified rear view of the solar module in an embodiment.
  • FIG. 2 is a simplified cross-sectional view from line II-II in FIG. 1 .
  • FIG. 3 is a simplified rear view of a solar cell in the embodiment.
  • FIG. 2 is a diagrammatic representation of FIG. 1 .
  • FIG. 5 is a simplified cross-sectional view of the solar cell string in section V of FIG. 2 .
  • FIG. 6 is an expanded view of the wiring member 32 in a modified example.
  • the solar module 1 includes a plurality of solar cell strings 10 each having a plurality of solar cells 20 . More specifically, the solar module 1 includes first through sixth solar cell strings 10 a - 10 f. As shown in FIG. 2 , the solar cell strings 10 are arranged between a first protecting member 11 and a second protecting member 12 . The first protecting member 11 is positioned on the light-receiving surface 20 a side of the solar cells 20 . The second protecting member 12 is positioned on the back surface 20 b side of the solar cells 20 . The second protecting member 12 has flexible properties. A sealing material layer 13 is provided between the first protecting member 11 and the second protecting member 12 . The solar cells 20 are sealed in the sealing material layer 13 .
  • the first protecting member 11 can be composed of a translucent member such as a glass substrate or a resin substrate.
  • the second protecting member 12 can be composed of a flexible member such as a resin sheet or a resin sheet containing interposed metal foil.
  • the sealing material layer 13 can be composed of a resin such as an ethylene-vinyl acetate (EVA) copolymer, polyvinyl butyral (PVB), polyethylene (PE) or polyurethane (PU).
  • EVA ethylene-vinyl acetate
  • PVB polyvinyl butyral
  • PE polyethylene
  • PU polyurethane
  • the sealing material layer 13 preferably includes a non-crosslinked resin.
  • Each of the solar cell strings 10 has a plurality of solar cells 20 arranged in the x-axis direction. As shown in FIG. 1 and FIG. 3 , each solar cell 20 has a photoelectric conversion unit 23 , a first electrode 21 , and a second electrode 22 .
  • the photoelectric conversion unit 23 has a first main surface 23 a and a second main surface 23 b.
  • the first main surface 23 a of the photoelectric conversion unit 23 comprises the light-receiving surface 20 a of the solar cell 20
  • the second main surface 23 b comprises the back surface 20 b of the solar cell 20 .
  • the photoelectric conversion unit 23 is the member that generates carriers such as holes or electrons when exposed to light. Carriers may be generated by the photoelectric conversion unit 23 when light is incident only on the first main surface 23 a, or when light is incident on both the first main surface 23 a and on the second main surface 23 b. In other words, the solar cells 20 may be bifacial solar cells.
  • the photoelectric conversion unit 23 can be composed, for example, of a crystalline silicon substrate.
  • each solar cell 20 is a back contact solar cell.
  • both the first electrode 21 and the second electrode 22 have a comb shape.
  • the first electrode 21 and the second electrode 22 are interdigitated. More specifically, each of first electrode 21 and the second electrode 22 have a plurality of finger portions 21 a, 22 a and busbar portions 21 b, 22 b. Each of the finger portions 21 a, 22 a extends in the x-axis direction.
  • the finger portions 21 a, 22 a are interdigitated in the y-axis direction which is orthogonal to the x-axis direction.
  • the finger portions 21 a are connected electrically to the busbar portion 21 b.
  • the busbar portion 21 b is arranged on one side (the x1 side) of the finger portions 21 a in the x-axis direction.
  • the busbar portion 21 b is provided on the x1 end portion of the solar cell 20 in the x-axis direction and extends from one end to the other end of the end portion in the y-axis direction.
  • the finger portions 22 a are connected electrically to the busbar portion 22 b.
  • the busbar portion 22 b is arranged on the other side (the x2 side) of the finger portions 22 a in the x-axis direction.
  • the busbar portion 22 b is provided on the x2 end portion of the solar cell 20 in the x-axis direction and extends from one end to the other of the end portion in the y-axis direction.
  • a plurality of solar cells 20 are connected electrically via a first wiring member 31 in each of the solar cell strings 10 . More specifically, the first electrode 21 of one solar cell 20 is connected electrically to the second electrode 22 of another adjacent solar cell 20 in the x-axis direction via a first wiring member 31 .
  • the first wiring member 31 can be composed of a flexible printed circuit (FPC) board having metal foil of Ag or Cu, a laminate of metal foil, metal foil whose surface is coated with solder, insulating film, and wiring arranged on the insulating film.
  • FPC flexible printed circuit
  • the first wiring member 31 is bonded to the back surface 20 b of the solar cell 20 via an adhesive layer (not shown).
  • the adhesive layer can be composed of a cured resin adhesive, a cured resin adhesive containing a dispersed metal material, or solder.
  • the first through sixth solar cell strings 10 a - 10 f are connected electrically via a second wiring member 32 . More specifically, solar cell 20 A positioned at the far x2 side of the first solar cell string 10 a and solar cell 20 B positioned at the far x2 side of the second solar cell string 10 b, solar cell 20 C positioned at the far x2 side of the third solar cell string 10 c and solar cell 20 D positioned at the far x2 side of the fourth solar cell string 10 d, and solar cell 20 E positioned at the far x2 side of the fifth solar cell string 10 e and solar cell 20 F positioned at the far x2 side of the sixth solar cell string 10 f are connected to each other electrically via a second wiring member 32 .
  • the second wiring member 32 electrically connects the first electrode 21 of solar cells 20 A, 20 C and 20 E to the second electrode 22 of solar cells 20 B, 20 D and 20 F.
  • solar cell 20 H positioned at the far x1 side of the second solar cell string 10 b and solar cell 201 positioned at the far x1 side of the third solar cell string 10 c, and solar cell 20 J positioned at the far x1 side of the fourth solar cell string 10 d and solar cell 20 K positioned at the far x1 side of the fifth solar cell string 10 e are connected to each other electrically via a second wiring member 32 .
  • the second wiring member 32 electrically connects the first electrode 21 of solar cells 20 H and 20 J to the second electrode 22 of solar cells 201 and 20 K.
  • a first extraction electrode 41 is composed of a portion of the second wiring member 32 connected electrically to solar cells 20 H and 201 , and a portion of the second wiring member 32 connected electrically to solar cells 20 J and 20 K. As shown in FIG. 2 , the first extraction electrode 41 is drawn from the solar module 1 . More specifically, the tip portion of the first extraction electrode 41 reaches the outside of the second protecting member 12 .
  • the second wiring member 32 is composed of two wiring members 32 a and a wiring member 32 b. Each of the two wiring members 32 a is bonded via an adhesive layer 40 to a solar cell 20 and is electrically connected to a first electrode 21 or a second electrode 22 .
  • the wiring member 32 b is connected electrically to the two wiring members 32 a.
  • the wiring member 32 a is arranged on one end portion of a solar cell 20 in one direction (the x-axis direction) so as to extend from the end on the y1 side to the end on the y2 side in the other direction (the y-axis direction) which is orthogonal to the one direction (the x-axis direction).
  • wiring member 32 a is composed of a flexible printed circuit board having resin film 51 and wiring 52 .
  • the resin film 51 can be made of a resin such as polyimide (PI) or polyethylene terephthalate (PET).
  • the wiring 52 is arranged on the resin film 51 .
  • the wiring 52 is connected electrically to a first electrode 21 or a second electrode 22 .
  • the wiring 52 can be composed of metal foil containing at least one metal such as Cu or Ag.
  • the wiring member 32 a has a first portion 32 a 1 , a second portion 32 a 2 , and a bent portion 32 a 3 .
  • the first portion 32 a 1 comprises the portion at one end of the wiring member 32 a .
  • the first portion 32 a 1 is arranged so that the wiring 52 faces the solar cell 20 side.
  • the first portion 32 a 1 is bonded to the back surface 20 b of the solar cell 20 .
  • the second portion 32 a 2 comprises the portion at the other end of the wiring member 32 a.
  • the second portion 32 a 2 is arranged so that the wiring 52 faces the reverse side from the solar cell 20 .
  • At least some of the second portion 32 a 2 is arranged on the first portion 32 a 1 . In other words, at least some of the second portion 32 a 2 overlaps with the first portion 32 a 1 in the z-axis direction, which is the thickness direction of the solar cell 20 .
  • the bent portion 32 a 3 connects the first portion 32 a 1 to the second portion 32 a 2 .
  • the bent portion 32 a 3 has a bent structure.
  • the wiring 52 faces outward.
  • the bent portion 32 a 3 is arranged on the back surface 20 b of the solar cell 20 . In other words, the bent portion 32 a 3 overlaps with the solar cell 20 in the z-axis direction.
  • the bent portion 32 a 3 is the portion formed by bending a flat wiring member.
  • the wiring member 32 b is connected electrically to the wiring 52 of the wiring member 32 a in the second portion 32 a 2 .
  • Wiring member 32 b may be bonded to wiring member 32 a using a resin adhesive. However, in the present embodiment, it is bonded to the wiring member 32 a using solder and is connected electrically to the wiring 52 of the wiring member 32 a.
  • the wiring member 32 b is bonded to a portion of the wiring member 32 a in the other direction (the y-axis direction).
  • the ratio of the length of the bonded portion of wiring member 32 a and wiring member 32 b in the y-axis direction to the length of wiring member 32 a in the y-axis direction ((length of bonded portion of wiring members 32 a and 32 b in y-axis direction)/(length of wiring member 32 a in y-axis direction)) is preferably from 1/20 to 1, and more preferably from 1/20 to 1/2.
  • a portion of the wiring member 32 b is composed of an extraction electrode 41 , and is drawn from the solar module 1 .
  • wiring member 32 b is composed of metal foil made of at least one type of metal such as Cu or Ag.
  • the thickness of the wiring member 32 b is greater than the thickness of the wiring 52 .
  • the thickness of the wiring member 32 b is preferably two or more times the thickness, and more preferably five or more times the thickness, of the wiring 52 .
  • the second electrode 22 of the solar cell 20 G positioned at the far x1 end of the first solar cell string 10 a and the first electrode 21 of the solar cell 20 L positioned at the far x1 end of the sixth solar cell string 10 f are connected electrically by a third wiring member 33 .
  • the solar cells 20 G, 20 L and the third wiring member 33 are bonded via an adhesive layer 40 .
  • the third wiring member 33 has wiring member 32 a and wiring member 33 b.
  • Wiring member 32 a comprises a portion of the third wiring member 33 , and has a configuration substantially similar to wiring member 32 a composing a portion of the second wiring member 32 .
  • Wiring member 32 a composing a portion of the third wiring member 33 is bonded to and connects electrically the second electrode 22 of solar cell 20 G and the first electrode 21 of solar cell 20 L.
  • Wiring member 33 b is connected electrically to wiring member 32 a composing a portion of the third wiring member 33 .
  • a portion of wiring member 33 b comprises an extraction electrode 42 which is drawn from the solar module 1 .
  • Wiring member 33 b is connected electrically to wiring 52 in the second portion 32 a 2 of the wiring member 32 a composing a portion of the third wiring member 33 .
  • Wiring member 33 b may be bonded to wiring member 32 a using a resin adhesive. However, in the present embodiment, it is bonded to the wiring member 32 a using solder and is connected electrically to the wiring 52 of the wiring member 32 a.
  • the wiring member 33 b is bonded to a portion of the wiring member 32 a in the other direction (the y-axis direction).
  • wiring member 33 b is composed of metal foil made of at least one type of metal such as Cu or Ag.
  • the thickness of the wiring member 33 b is greater than the thickness of the wiring 52 .
  • the thickness of the wiring member 33 b is preferably two or more times the thickness, and more preferably five or more times the thickness, of the wiring 52 .
  • An insulating sheet 60 is arranged between the wiring 32 b, 33 b composed of metal foil and the back surface 20 b of the solar cell 20 . In this way, short circuiting between the wiring 32 b, 33 b and the electrodes 21 , 22 can be suppressed.
  • the insulating sheet 60 can be composed of the resin used in the resin film 51 (PI, PET, etc.) or can be the resin used in the sealing material layer 13 (EVA, PVB, PE, PU, etc.).
  • a bent portion 32 a 3 is arranged on the solar cells 20 .
  • the temperature of the solar module 1 rises and the viscosity of the sealing material layer 13 containing a non-crosslinked resin decreases.
  • the section of the wiring 52 positioned on the bending portion 32 a 3 is unlikely to make contact with the edge 23 c of the photoelectric conversion unit 23 .
  • improved photoelectric conversion efficiency and improve reliability can be realized.
  • the size of the wiring member 32 a can be reduced. Therefore, the manufacturing costs for the solar module 1 can be kept down.
  • the size of the solar module 1 can also be reduced.
  • the wiring members 32 , 33 are composed of wiring member 32 a and either wiring member 32 b made of metal foil or wiring member 33 b. In this way, the wiring members 32 , 33 can share the same specifications as the wiring member 32 a of resin film 51 and wiring 52 , even when many different types of wiring members 32 , 33 are present.
  • the wiring members 32 b, 33 b of metal foil are bonded to a portion of the wiring member 32 a in the y-axis direction.
  • the wiring members 32 b, 33 b and the solar cells 20 are unlikely to be subjected to stress, even when the temperature of the solar module 1 rises and the wiring members 32 b, 33 b expand more than the solar cells 20 .
  • damage to the wiring members 32 b, 33 b and damage to or warping of the solar cells 20 can be suppressed.
  • the wiring member 32 a uses flexible resin film 51 as its substrate, a large amount of stress caused by thermal expansion is less likely to occur between the wiring member 32 a and the solar cells 20 .
  • wiring members 32 b and 33 b are preferably fixed to wiring member 32 a by placing a heat-resistant sheet over the solar cells 20 , and soldering wiring member 32 a to wiring members 32 b and 33 b on the heat-resistant sheet.
  • the insulating sheet 60 arranged between the wiring members 32 b, 33 b and the back surface 20 b of the solar cells 20 may have heat-resistant properties. In this case, however, the thickness of the insulating sheet 60 has to be reduced as the thick portions concentrate force during the modulization process which can cause the solar cells 20 to crack. Therefore, use of a separate heat-resistant sheet is preferred.
  • the first electrode and the second electrode may be busbarless electrodes which have a plurality of finger portions but no busbar portion.
  • a solar module may also include a single solar cell.
  • FIG. 6 is an expanded view of the wiring member 32 in a modified example.
  • the wiring 51 has a wiring main body 51 a and a plurality of linear portions 51 b.
  • a second portion 32 a 2 and a bent portion 32 a 3 are provided in at least the wiring main body 51 a.
  • the linear portions 51 b are connected to the wiring main body 51 a.
  • the linear portions 51 b are interdigitated in the y-direction.
  • the linear portions 51 b are connected electrically to finger portions 21 a or finger portions 22 a.
  • a plurality of openings 51 c are provided in the wiring 51 in the bent portion 32 a 3 of the wiring member 32 .
  • the openings 51 c are arranged in the y-direction, which is the direction in which the bent portion 32 a 3 extends. This improves the flexibility of the bent portion 32 a 3 . This makes it easier to bend a flat member when the flat member is bent to form wiring member 32 . This makes the wiring member 32 easier to manufacture. Also, when a flat member is bent to create a wiring member 32 and stress is applied to the bent portion repeatedly over the temperature cycle, the wiring 32 is unlikely to become disconnected.
  • openings 51 c are provided in the wiring main body 51 a and the bent portion 32 a 3 is formed in the portion with the wiring main body 51 a, disconnected wiring 32 is prevented even more effectively. Because the spacing P1 of the openings 51 c is greater than the width P2 of the linear portions 51 b, disconnected wiring 32 is prevented even more effectively.
  • the spacing P1 of the openings 51 c should be greater than the width P2 of the linear portions 51 b, and preferably at least 1 . 5 times greater. From the standpoint of preventing disconnected wiring 32 , the width P3 of each opening 51 c is preferably smaller than the spacing P1 between openings 51 c.
  • the openings 51 c have a rounded rectangular shape to facilitate bending and prevent disconnection.
  • the shape of the openings may be elliptical, oval shaped, rectangular or polygonal.
  • the openings may also have a slender shape which extends in the direction in which the bent portion 32 a 3 extends.
  • a single opening 51 c may be provided.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Sustainable Energy (AREA)
  • Photovoltaic Devices (AREA)
US14/222,043 2011-09-29 2014-03-21 Solar module Abandoned US20140202518A1 (en)

Applications Claiming Priority (3)

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JP2011-213704 2011-09-29
JP2011213704 2011-09-29
PCT/JP2012/059629 WO2013046773A1 (ja) 2011-09-29 2012-04-09 太陽電池モジュール

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PCT/JP2012/059629 Continuation WO2013046773A1 (ja) 2011-09-29 2012-04-09 太陽電池モジュール

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US14/222,043 Abandoned US20140202518A1 (en) 2011-09-29 2014-03-21 Solar module
US14/221,977 Active US9490383B2 (en) 2011-09-29 2014-03-21 Solar module
US15/285,455 Abandoned US20170084767A1 (en) 2011-09-29 2016-10-04 Solar module

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US14/221,977 Active US9490383B2 (en) 2011-09-29 2014-03-21 Solar module
US15/285,455 Abandoned US20170084767A1 (en) 2011-09-29 2016-10-04 Solar module

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US (3) US20140202518A1 (de)
EP (2) EP2763188A4 (de)
JP (3) JPWO2013046773A1 (de)
MY (1) MY170844A (de)
WO (2) WO2013046773A1 (de)

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CN110277960A (zh) * 2018-03-15 2019-09-24 波音公司 具有高封装密度的可卷曲太阳能电源模块
US10454416B2 (en) 2016-08-23 2019-10-22 Kabushiki Kaisha Toyota Jidoshokki Solar battery module

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015098203A1 (ja) * 2013-12-27 2015-07-02 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
WO2016157696A1 (ja) * 2015-03-31 2016-10-06 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
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US9490383B2 (en) 2016-11-08
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