WO2014010486A1 - Module de cellules solaires et son procédé de fabrication - Google Patents

Module de cellules solaires et son procédé de fabrication Download PDF

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Publication number
WO2014010486A1
WO2014010486A1 PCT/JP2013/068258 JP2013068258W WO2014010486A1 WO 2014010486 A1 WO2014010486 A1 WO 2014010486A1 JP 2013068258 W JP2013068258 W JP 2013068258W WO 2014010486 A1 WO2014010486 A1 WO 2014010486A1
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WIPO (PCT)
Prior art keywords
solar cell
adhesive
conductor
cell module
electrode
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PCT/JP2013/068258
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English (en)
Japanese (ja)
Inventor
大地 森
Original Assignee
デクセリアルズ株式会社
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Application filed by デクセリアルズ株式会社 filed Critical デクセリアルズ株式会社
Priority to CN201380036546.6A priority Critical patent/CN104428904A/zh
Priority to KR1020157003030A priority patent/KR102019310B1/ko
Publication of WO2014010486A1 publication Critical patent/WO2014010486A1/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
    • H01L31/02—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
    • H01L31/04—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
    • 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
    • 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 and a manufacturing method thereof.
  • Solar cells are expected as a new energy source because they directly convert clean and inexhaustible sunlight into electricity.
  • the solar cell is used, for example, as a solar cell module in which a plurality of solar cells are connected via tab wires.
  • a type in which solder is applied to the surface of the copper wire has been used.
  • the electrode of the photovoltaic cell and the tab wire were connected via solder.
  • solder connection since a high temperature is required for solder connection, the panel of the light receiving surface is cracked or warped, and a short circuit due to solder that has leaked out (leaked) from the tab wire has occurred, causing problems.
  • connection materials such as conductive adhesives and insulating adhesives have been used as connection materials in place of solder.
  • a solar battery module in which a surface electrode of a solar battery cell and a tab wire are connected via a conductive adhesive has been proposed (see, for example, Patent Document 1).
  • the tab wire is not connected to the solar cell due to curing shrinkage of the conductive adhesive due to heating and pressing when connecting the surface electrode of the solar battery cell and the tab wire, and stress concentration on the conductive adhesive.
  • connection reliability falls, such as peeling from a battery cell. This problem becomes more prominent when the tab line is thinned to increase the light receiving area for the purpose of further increasing the photoelectric efficiency in recent years.
  • an object of the present invention is to provide a solar cell module excellent in connection reliability and a manufacturing method thereof.
  • Means for solving the problems are as follows. That is, ⁇ 1> A solar battery cell having an electrode, a tab wire, and a first adhesive, The electrode of the solar battery cell and the tab wire are connected via the first adhesive, At least in the connection region where the electrode of the solar battery cell and the tab wire are connected, the tab wire has two or more conductors, and the conductors are connected via a second adhesive.
  • This is a solar cell module.
  • ⁇ 2> The solar cell module according to ⁇ 1>, wherein an average thickness in a connecting direction of the conductor is 9 ⁇ m to 200 ⁇ m.
  • ⁇ 3> The ratio (A / B) of the sum (A) of the average thickness ( ⁇ m) in the connecting direction of each conductor in the tab line to the average width ( ⁇ m) (B) of the tab line is 0.009 to The solar cell module according to any one of ⁇ 1> to ⁇ 2>, which is 0.250.
  • ⁇ 4> The solar cell module according to any one of ⁇ 1> to ⁇ 3>, wherein the conductor contains one of copper and aluminum.
  • ⁇ 5> The solar cell module according to any one of ⁇ 1> to ⁇ 4>, wherein the number of conductors in the tab line is 2 to 5.
  • the solar cell module according to any one of ⁇ 1> to ⁇ 5> which is any one of a crystalline solar cell module and a thin film solar cell module.
  • ⁇ 7> The solar cell according to any one of ⁇ 1> to ⁇ 6>, wherein at least one of the first adhesive and the second adhesive is any one of a conductive adhesive and an insulating adhesive. It is a module.
  • the present invention it is possible to provide a solar cell module that can solve the above-described problems, achieve the above-described object, and has excellent connection reliability, and a method for manufacturing the same.
  • FIG. 1 is a schematic top view showing an example of a thin film solar cell module.
  • FIG. 2 is an exploded perspective view showing an example of a crystalline solar cell module.
  • FIG. 3 is a schematic cross-sectional view showing an example of a crystalline solar cell module.
  • FIG. 4 is a schematic cross-sectional view of an example of a tab line used in the present invention.
  • FIG. 5 is a schematic top view of a crystalline solar cell model.
  • FIG. 6 is a cross-sectional photograph of a thin film solar cell model (Example 2) in which tab wires are arranged.
  • the solar cell module of the present invention has at least a solar cell, a tab wire, and a first adhesive, and, if necessary, other resins such as a sealing resin, a moisture-proof backsheet, and a glass plate. It has a member.
  • the electrode of the solar battery cell and the tab wire are connected via the first adhesive.
  • the solar battery cell is not particularly limited as long as it has electrodes, and can be appropriately selected according to the purpose.
  • the solar battery cell has at least a photoelectric conversion element as a photoelectric conversion unit, a finger electrode, and a bus bar electrode. Furthermore, it has other members as required.
  • Examples of the solar battery cell include a thin film solar battery cell and a crystalline solar battery cell.
  • Examples of the thin film solar cell include an amorphous silicon solar cell, a compound solar cell (CIS solar cell, CdS / CdTe solar cell), a dye-sensitized solar cell, and an organic thin film solar cell.
  • microcrystalline silicon solar cells tandem solar cells.
  • Examples of the crystalline solar battery cell include a single crystal silicon solar battery cell and a polycrystalline silicon solar battery cell.
  • the solar battery cell may have a bus bar-less structure having no bus bar electrode.
  • the average thickness of the solar cells is not particularly limited and can be appropriately selected depending on the purpose.
  • the finger electrode is an electrode that collects electricity generated in the photoelectric conversion unit.
  • the finger electrode is formed on the solar battery cell in a direction substantially orthogonal to the tab line.
  • the material of the finger electrode is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include silver, gold, copper, tin, and nickel.
  • the average width of the finger electrode is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 20 ⁇ m to 200 ⁇ m, and more preferably 20 ⁇ m to 100 ⁇ m.
  • the average width can be obtained, for example, by measuring the width of the finger electrode at any 10 points of the finger electrode and averaging the measured values.
  • the said finger electrode there is no restriction
  • the bus bar electrode is an electrode that further collects electricity collected by the finger electrodes and transmits the electricity to the tab wire.
  • electricity is directly transmitted from the finger electrode to the tab wire.
  • the material of the bus bar electrode is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include silver, gold, copper, tin, and nickel.
  • the average width of the bus bar electrode is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 500 ⁇ m to 5,000 ⁇ m, and more preferably 800 ⁇ m to 2,000 ⁇ m.
  • the average width can be obtained, for example, by measuring the width of the bus bar electrode at any 10 points of the bus bar electrode and averaging the measured values.
  • the method for forming the bus bar electrode is not particularly limited and may be appropriately selected depending on the purpose.
  • a silver paste is printed on the photoelectric conversion element so that the bus bar electrode has a desired pattern shape.
  • Examples of the printing method include screen printing.
  • the bus bar electrode and the finger electrode may be formed simultaneously.
  • the bus bar electrode and the finger electrode are simultaneously formed by screen-printing a silver paste on the photoelectric conversion element using a printing plate having a pattern shape capable of forming a desired bus bar electrode and a desired finger electrode. can do.
  • the conductive adhesive is not particularly limited and may be appropriately selected depending on the purpose.
  • the conductive adhesive contains at least conductive particles, and preferably includes a film-forming resin, a curable resin, and a curing agent.
  • a conductive adhesive containing other components as necessary is also included.
  • Conductive particles-- The conductive particles are not particularly limited and may be appropriately selected depending on the purpose. For example, nickel particles, gold-coated nickel particles, resin particles with a resin core coated with Ni, and resin cores with Ni coated. Furthermore, resin particles whose outermost surface is coated with Au can be mentioned.
  • film-forming resin-- There is no restriction
  • the said curable resin there is no restriction
  • the said curable resin may be hardened
  • epoxy resin There is no restriction
  • the acrylate resin is not particularly limited and may be appropriately selected depending on the intended purpose.
  • the curable resin is preferably used in combination with a curing agent.
  • the curing agent is not particularly limited and may be appropriately selected depending on the intended purpose.
  • imidazoles represented by 2-ethyl 4-methylimidazole; lauroyl peroxide, butyl peroxide, benzyl peroxide, Organic peroxides such as dilauroyl peroxide, dibutyl peroxide, peroxydicarbonate, benzoyl peroxide; anionic curing agents such as organic amines; cationic curing agents such as sulfonium salts, onium salts, aluminum chelating agents, etc. Is mentioned.
  • combinations of epoxy resins and imidazoles, and combinations of acrylate resins and organic peroxides are particularly preferable.
  • the insulating adhesive is not particularly limited and may be appropriately selected depending on the purpose.
  • the insulating adhesive contains a film-forming resin, a curable resin, and a curing agent, and, if necessary, other Insulating adhesives containing these components may be mentioned.
  • the film-forming resin, the curable resin, the curing agent, and the other components in the insulating adhesive are not particularly limited and may be appropriately selected depending on the purpose.
  • the conductive adhesive Examples thereof include the film-forming resin, the curable resin, the curing agent, and the other components exemplified in the description of the agent.
  • the first adhesive may be used in a liquid form or in a film form when the solar cell module is manufactured.
  • the tab line includes two or more conductors at least in a connection region where the electrode of the solar battery cell and the tab line are connected.
  • the conductors are connected via a second adhesive.
  • the material of the conductor is not particularly limited and can be appropriately selected according to the purpose. Examples thereof include copper, aluminum, iron, gold, silver, nickel, palladium, chromium, molybdenum, and alloys thereof. Can be mentioned.
  • the conductor preferably contains either copper or aluminum.
  • the shape of the conductor is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a flat plate shape.
  • the structure of the conductor is not particularly limited and may be appropriately selected depending on the purpose, and may be a single layer structure or a laminated structure.
  • the single layer structure include a single layer structure made of copper, aluminum, or the like.
  • the laminated structure include a laminated structure having a base material made of copper, aluminum or the like and a plating layer. Examples of the material of the plating layer include gold, silver, tin, and solder.
  • the average thickness in the connecting direction of the conductor is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 9 ⁇ m to 200 ⁇ m, and more preferably 9 ⁇ m to 150 ⁇ m. When the average thickness is less than 9 ⁇ m, the extraction efficiency of electricity generated by the solar battery cells may be lowered, and when it exceeds 200 ⁇ m, the connection reliability may be lowered. When the average thickness is within the more preferable range, it is advantageous in that connection reliability is more excellent.
  • the average thickness can be obtained, for example, by measuring the thickness in the connection direction of the conductor at any 10 points of the conductor and averaging the measured values. It can be said that the connection direction is a direction orthogonal to the surface of the solar battery cell.
  • the number of the conductors in the tab line is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 2 to 5, and more preferably 2 to 3. If the number exceeds 5, the tab wire may be misaligned in the pressing step when manufacturing the solar cell module, which may result in a decrease in connection reliability and a connection failure. When the number is within the more preferable range, it is advantageous in that connection reliability is more excellent.
  • the material of each of the two or more conductors in the tab line may be the same or different.
  • the average thickness in the connecting direction of the two or more conductors in the tab line may be the same or different.
  • Examples of the structure of the tab line include a structure arranged as follows. (1) Conductor / second adhesive / conductor (2) Conductor / second adhesive / conductor / second adhesive / conductor (3) Conductor / second adhesive / conduct Body / second adhesive / conductor / second adhesive / conductor (4) conductor / second adhesive / conductor / conductor / second adhesive / conductive Body / second adhesive / conductor (5) conductor / second adhesive / conductor / second adhesive / conductor / second adhesive / conductor / second adhesive / conductive Body / second adhesive / conductor (5) conductor / second adhesive / conductor / second adhesive / conductor / second adhesive / conductor / second adhesive / conductive Body / second adhesive / conductor
  • the conductor preferably has a protrusion on its surface.
  • the conductor preferably has a protrusion on its surface.
  • the thickness in the connection direction of the conductor when the conductor has a protrusion on the surface is a thickness of a portion excluding the protrusion.
  • the second adhesive is used in two or more places. At this time, the components of the second adhesive in two or more places are the same. It may be different or different.
  • the average width of the tab line is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 500 ⁇ m to 10,000 ⁇ m, and more preferably 800 ⁇ m to 4,000 ⁇ m.
  • the average width can be obtained, for example, by measuring the width of the conductor in the tab line at any 10 points of the tab line and averaging the measured values.
  • the width of the conductor is a distance in a direction orthogonal to the connection direction of the conductor.
  • the ratio (A / B) of the sum (A) of the average thickness ( ⁇ m) in the connecting direction of each conductor in the tab line and the average width ( ⁇ m) (B) of the tab line is no particular limitation.
  • it can be appropriately selected, but 0.009 to 0.250 is preferable, and 0.009 to 0.150 is more preferable.
  • the ratio (A / B) is less than 0.009, the extraction efficiency of electricity generated by the solar battery cell may be lowered, and when it exceeds 0.250, the connection reliability may be lowered. is there.
  • the ratio (A / B) is within the more preferable range, it is advantageous in that connection reliability is further improved.
  • the sealing resin is not particularly limited and may be appropriately selected depending on the purpose.
  • ethylene / vinyl acetate copolymer (EVA), ethylene / vinyl acetate / triallyl isocyanurate (EVAT) examples include polyvinyl butyrate (PVB), polyisobutylene (PIB), silicone resin, polyurethane resin, and the like.
  • ⁇ Dampproof back sheet> There is no restriction
  • PET polyethylene terephthalate
  • Al aluminum
  • PET aluminum
  • Al polyethylene
  • PE polyethylene
  • Glass plate> There is no restriction
  • the solar cell module may be a thin film solar cell module using the thin film solar cell or a crystalline solar cell module using the crystal solar cell.
  • FIG. 1 is a schematic top view showing an example of a thin-film solar cell module 200.
  • thin-film solar cells 32 made of thin-film photoelectric conversion elements are arranged in series on a substrate 38 in a planar direction.
  • the surface electrode (not shown) of the thin film solar cell 32c at one end and the surface electrode (not shown) of the thin film solar cell 32d at the other end are provided with a conductive adhesive layer (not shown).
  • a tab wire 3 for power extraction is connected.
  • FIG. 2 is an exploded perspective view showing an example of a crystalline solar cell module.
  • the crystalline solar cell module 1 includes strings 4 in which a plurality of crystalline solar cells 2 are connected in series by tab wires 3 serving as interconnectors, and further includes a matrix 5 in which a plurality of strings 4 are arranged.
  • the matrix 5 is sandwiched between the sealing resin sheets 6, and together with the front cover 7 provided on the light receiving surface side and the moisture-proof back sheet 8 provided on the back surface side. And laminated.
  • the crystalline solar cell module 1 is formed by attaching a metal frame 9 such as aluminum around the periphery.
  • each crystalline solar cell 2X, 2Y, 2Z of the crystalline solar cell module has a crystalline photoelectric conversion element 10 made of a silicon substrate.
  • the crystalline photoelectric conversion element 10 is provided with a bus bar electrode 11 serving as a surface electrode on the light receiving surface side and a finger electrode 12 serving as a collecting electrode formed in a direction substantially orthogonal to the bus bar electrode 11.
  • the crystalline photoelectric conversion element 10 is provided with an Al back electrode 13 made of aluminum on the back side opposite to the light receiving surface. Then, the bus bar electrode 11 on the surface of the solar battery cell 2 and the Al back electrode 13 of the adjacent solar battery cell 2 are electrically connected by the tab wire 3, thereby constituting the strings 4 connected in series. .
  • the connection between the tab wire 3 and the bus bar electrode 11 and the connection between the tab wire 3 and the Al back electrode 13 are performed by, for example, the conductive adhesive film 17.
  • FIG. 4 is a schematic cross-sectional view showing an example of a tab line.
  • the tab wire 3 is a laminated body in which a first conductor 3a, a second adhesive 3b, and a second conductor 3c are laminated in this order.
  • the second adhesive 3b is formed using, for example, a conductive adhesive film.
  • the manufacturing method of the solar cell module of the present invention includes at least a disposing step, a covering step, a pressing step, and a heating step, and further includes other steps as necessary.
  • the manufacturing method of the solar cell module of this invention can be used suitably for manufacture of the said solar cell module of this invention.
  • the arrangement step at least a first adhesive, a first conductor, a second adhesive, and a second conductor are arranged in this order on the electrode of the solar battery cell. If there is, there is no restriction
  • the first conductor, the second adhesive, and the second conductor form a tab line in the solar cell module of the present invention.
  • Examples of the solar battery cell include the solar battery cell exemplified in the description of the solar battery module of the present invention.
  • first adhesive and the second adhesive examples include the first adhesive and the second adhesive exemplified in the description of the solar cell module of the present invention.
  • the average thickness in the connecting direction of the first adhesive and the second adhesive is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 3 ⁇ m to 100 ⁇ m, more preferably 5 ⁇ m to 50 ⁇ m. Preferably, 10 ⁇ m to 35 ⁇ m is more preferable.
  • the average thickness can be obtained, for example, by measuring the thickness in the connecting direction at any 10 points of the first adhesive and the second adhesive and averaging the measured values.
  • Examples of the first conductor and the second conductor include the conductors exemplified in the description of the solar cell module of the present invention.
  • a film-like conductive adhesive (conductive adhesive film, first adhesive) slit to the same width as the bus bar electrode is placed on the bus bar electrode of the solar battery cell. Subsequently, a copper foil (first conductor) having the same width as that of the bus bar electrode is placed on the first adhesive. Subsequently, a film-like conductive adhesive (conductive adhesive film, second adhesive) slit to the same width as the bus bar electrode is placed on the first conductor. Subsequently, a copper foil (second conductor) having the same width as that of the bus bar electrode is placed on the second adhesive.
  • positioning process can be performed by the above.
  • a two-layer body in which a film-like conductive adhesive (adhesive) is placed on a copper foil (conductor) is prepared.
  • the width of the two-layer body is set to the same width as the bus bar electrode of the solar battery cell.
  • the two-layer body (first two-layer body) is placed on the bus bar electrode of the solar battery cell so that the adhesive (first adhesive) and the bus bar electrode are in contact with each other.
  • another two-layer body is placed on the placed two-layer body (first two-layer body), and the first two-layer body conductor (first And the second two-layer adhesive (second adhesive) are in contact with each other.
  • positioning process can be performed by the above.
  • a four-layer body in which two two-layer bodies on which a film-like conductive adhesive (adhesive) is placed on a copper foil (conductor) is prepared.
  • the width of the four-layer body is set to the same width as the bus bar electrode of the solar battery cell.
  • the four-layer body is placed on the bus bar electrode of the solar battery cell so that the adhesive (first adhesive) and the bus bar electrode are in contact with each other.
  • positioning process can be performed by the above.
  • the first conductor, the second conductor, and the electrode of the solar battery cell may be electrically connected or may not be electrically connected.
  • the covering step is not particularly limited as long as it is a step of covering the solar battery cell with a sealing resin and further covering the sealing resin with either a moisture-proof backsheet or a glass plate. Can be selected as appropriate.
  • the above solar cell module manufacturing method is preferably performed using a decompression laminator.
  • the method using the reduced pressure laminator can be carried out with reference to the method described in JP 2010-283059 A, for example.
  • the sealing resin, the moisture-proof backsheet, and the glass plate are not particularly limited and can be appropriately selected according to the purpose.
  • examples thereof include a sealing resin, the moisture-proof backsheet, and the glass plate.
  • the pressing step is not particularly limited as long as it is a step of pressing either the moisture-proof backsheet or the glass plate, and can be appropriately selected according to the purpose.
  • the pressure to press and the time to press are arbitrary.
  • the heating step is not particularly limited as long as it is a step of heating the heating stage on which the solar battery cell is placed, and can be appropriately selected according to the purpose.
  • the sealing resin can be heated by heating the heating stage. Further, the first adhesive and the second adhesive can be heated.
  • the heating temperature in the heating step is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 50 ° C to 250 ° C, more preferably 100 ° C to 200 ° C.
  • sealing may be insufficient, and when it exceeds 250 ° C., an organic resin contained in an adhesive, a sealing resin, or the like may be thermally decomposed.
  • the heating temperature is within the more preferable range, it is advantageous in terms of sealing reliability.
  • the heating time in the heating step is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 1 second to 1 hour, more preferably 5 seconds to 30 minutes, and particularly preferably 10 seconds to 20 minutes. preferable. If the heating time is less than 1 second, sealing may be insufficient. When the heating time is within the particularly preferable range, it is advantageous in terms of sealing reliability.
  • the order of starting the pressing step and the heating step is not particularly limited and may be appropriately selected depending on the purpose.
  • the pressing step and the heating step cause the first conductor, One conductor, the second conductor, and the electrode of the solar battery cell may be electrically connected.
  • the solar cell module of the present invention is manufactured. Further, for example, the solar cell module of the present invention can be manufactured by forming a matrix in which a plurality of strings in which a plurality of solar cells are directly connected are arranged and sealing the matrix.
  • Example 1 ⁇ Production of solar cell module model> -conductor- A copper foil (average thickness 9 ⁇ m) slit to an average width of 2,000 ⁇ m was used as the conductor.
  • -Conductive adhesive film- A conductive adhesive film (SP100 series, average thickness 25 ⁇ m, manufactured by Sony Chemical & Information Device Co., Ltd.) was prepared and used by slitting to an average width of 2,000 ⁇ m.
  • a conductive adhesive film (first adhesive), a conductor (first conductor), a conductive adhesive film (second adhesive), and a conductor on the electrode of the thin-film solar cell model (Second conductor) was disposed in this order, and then temporarily attached.
  • the temporary bonding conditions were a heating temperature of 70 ° C., a pressure of 0.5 MPa, and 1 second, and a heating tool was used.
  • a thin film solar cell model with a tab line in which the first adhesive and the tab wire were laminated on the electrode of the thin film solar cell model was obtained.
  • the tab wire is a laminated body in which a first conductor, a second adhesive, and a second conductor are laminated. Two laminates were arranged on the electrode of the thin-film solar cell model with an interval of 8.0 cm.
  • the obtained thin-film solar cell model with tab wires was covered with a sealing resin, and the sealing resin was further covered with a moisture-proof backsheet.
  • a sealing resin an ethylene / vinyl acetate copolymer having a thickness of 500 ⁇ m was used.
  • a PET film was used for the back sheet.
  • the sealing resin was sealed with a laminator. Specifically, vacuuming was performed at 100 ° C. for 5 minutes, followed by laminating at a press time of 5 minutes and 0.1 MPa, and then curing in an oven at 155 ° C. for 45 minutes. As described above, a thin film solar cell module model was obtained.
  • the resistance value between two tab wires of the obtained thin film solar cell module model was measured. Resistance values after initial, after TC200, and after TC400 were measured using a digital multimeter (manufactured by Yokogawa Electric Co., Ltd., digital multimeter 7555), and evaluated according to the following evaluation criteria.
  • the TC200 has a temperature rise from ⁇ 40 ° C. to 85 ° C. (temperature rise rate 2 ° C./min), hold at 85 ° C. for 35 minutes, and temperature drop from 85 ° C. to ⁇ 40 ° C. (temperature drop rate 2 ° C./min) ), And a 35 minute hold at ⁇ 40 ° C. for one cycle and a test for 200 cycles.
  • the TC400 indicates a test in which the cycle is performed 400 times.
  • ⁇ Evaluation criteria ⁇ : Less than 10 m ⁇ ⁇ : 10 m ⁇ or more and less than 20 m ⁇ ⁇ : 20 m ⁇ or more and less than 100 m ⁇ ⁇ : 100 m ⁇ or more
  • Example 2 In Example 1, except that the material of the conductor, the average thickness of the conductor, and the average width of the tab line were respectively changed to the material of the conductor, the average thickness of the conductor, and the average width of the tab line shown in Table 1.
  • a thin film solar cell module model was prepared and evaluated. The results are shown in Table 1.
  • the average width of the conductive adhesive film was 800 ⁇ m.
  • the average width of the conductive adhesive film was 1,500 ⁇ m.
  • FIG. A tab wire formed by connecting the first conductor 3a and the second conductor 3c via the second adhesive 3b is disposed on the thin-film solar cell model 32a via the conductive adhesive film 17. Has been.
  • Example 9 In Example 1, except that a conductive adhesive film (third adhesive) and a conductor (third conductor) were further arranged in this order on the second conductor during temporary attachment. In the same manner as in Example 1, a thin film solar cell module model was prepared and evaluated. The results are shown in Table 1.
  • Example 10 As a crystalline solar cell model, a glass substrate on which finger electrodes 12 with an average width of 100 ⁇ m and bus bar electrodes 11 with an average width of 2,000 ⁇ m were formed as shown in FIG. Specifically, a pattern of finger electrodes 12 and bus bar electrodes 11 as shown in FIG. 5 is formed by screen printing and baking a silver paste on a glass substrate (length 125 mm ⁇ width 125 mm ⁇ thickness 0.7 mm). Crystalline solar cell model 2 ′ was obtained. On the bus bar electrode of the obtained crystalline solar cell model, the conductive adhesive film (first adhesive) shown in Example 1 and the conductor (first conductor) shown in Example 1 were implemented.
  • the conductive adhesive film (second adhesive) shown in Example 1 and the conductor (second conductor) shown in Example 1 were disposed in this order, and then temporarily attached.
  • the temporary bonding conditions were a heating temperature of 70 ° C., a pressure of 0.5 MPa, and 1 second, and a heating tool was used.
  • a crystalline solar cell model with a tab line in which the first adhesive and the tab line were laminated on the bus bar electrode of the crystalline solar cell model was obtained.
  • the tab wire is a laminated body in which a first conductor, a second adhesive, and a second conductor are laminated.
  • Example 1 a crystalline solar cell module model was prepared and evaluated in the same manner as in Example 1, except that the tabbed crystalline solar cell model obtained above was used. The results are shown in Table 1.
  • Example 1 the average thickness of the first conductor, the average thickness of the second conductor, and the average width of the tab line are the average thickness of the first conductor described in Table 2, and the second conductor A thin film solar cell module model was prepared and evaluated in the same manner as in Example 1 except that the average thickness and the average width of the tab line were changed. The results are shown in Table 2.
  • Example 14 In Example 4, a thin-film solar cell module model was prepared and evaluated in the same manner as in Example 4 except that the average thickness of the conductive adhesive film was changed to 10 ⁇ m. The results are shown in Table 2.
  • Example 15 a thin-film solar cell module model was produced and evaluated in the same manner as in Example 4 except that the average thickness of the conductive adhesive film was changed to 35 ⁇ m. The results are shown in Table 2.
  • soldered tab wire obtained above was arranged on the electrode of the thin-film solar cell model prepared in Example 1 so that the electrode and the solder of the soldered tab wire were in contact with each other. Two soldered tab wires were arranged, and the interval between them was the same as in Example 1. Then, using a soldering iron, it was heated at a heating temperature of 240 ° C. to obtain a thin film solar cell model with a tab wire.
  • the obtained thin-film solar cell model with tab wires was covered with a sealing resin, and the sealing resin was further covered with a moisture-proof backsheet.
  • a sealing resin an ethylene / vinyl acetate copolymer having a thickness of 500 ⁇ m was used.
  • a PET film was used for the back sheet.
  • the sealing resin was sealed with a laminator. Specifically, vacuuming was performed at 100 ° C. for 5 minutes, followed by laminating at a press time of 5 minutes and 0.1 MPa, and then curing in an oven at 155 ° C. for 45 minutes.
  • a thin film solar cell module model was obtained.
  • the obtained thin film solar cell module model was evaluated in the same manner as in Example 1. The results are shown in Table 2.
  • Example 2 A thin-film solar cell module in the same manner as in Example 1, except that the average thickness of the first conductor was changed to 400 ⁇ m and the second adhesive and the second conductor were not used in Example 1. A model was created and evaluated. The results are shown in Table 2.
  • Comparative Example 3 In Comparative Example 1, a thin-film solar cell module was prepared and evaluated in the same manner as Comparative Example 1 except that the average thickness of the copper foil was changed to 200 ⁇ m. The results are shown in Table 2.
  • Comparative Example 4 a thin-film solar cell module was produced and evaluated in the same manner as in Comparative Example 2 except that the average thickness of the first conductor was changed to 200 ⁇ m. The results are shown in Table 2.
  • the solar cell modules produced in Examples 1 to 15 were excellent in connection reliability.
  • As the average thickness of the conductor it was confirmed that 9 ⁇ m to 150 ⁇ m was very preferable because the conduction resistance was very excellent even after TC400 (see, for example, Examples 1 to 4 and Example 11).
  • As the sum of the average thicknesses of the conductors in the tab wire it was confirmed that 18 ⁇ m to 300 ⁇ m was very preferable because the conduction resistance was very excellent even after TC400 (for example, Examples 1 to 4 and Example 11). reference).
  • the conduction resistance is very excellent even after TC400. From the point, it was confirmed that 0.009 to 0.150 is very preferable (for example, see Examples 1 to 4, 8 to 9, and 11).
  • the material of the conductor it was confirmed that both copper and aluminum have excellent connection reliability (for example, see Examples 4 and 6).
  • the type of the solar cell module it was confirmed that the connection reliability was excellent in both the thin-film solar cell module and the crystalline solar cell module (for example, see Examples 4 and 10).
  • Comparative Examples 1 and 2 the conduction resistance was very large in TC200 and TC400, and the connection reliability was not sufficient. Further, in Comparative Examples 3 and 4, the conduction resistance increased with TC400, and the connection reliability was not sufficient.
  • the solar cell module of the present invention is excellent in connection reliability, it can be particularly suitably used for a solar cell module in which the tab line is thinned to increase the light receiving area for the purpose of increasing the photoelectric efficiency.

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  • Engineering & Computer Science (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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente invention porte sur un module de cellules solaires comprenant des lignes de languette, un premier adhésif, et des cellules solaires comportant des électrodes. Les électrodes des cellules solaires et les lignes de languette sont connectées par le premier adhésif. Le module de cellules solaires est formé par les lignes de languette ayant deux conducteurs électriques ou plus dans une région de connexion où au moins les électrodes des cellules solaires et les lignes de languette se connectent, et par les conducteurs électriques qui sont connectés les uns aux autres par un second adhésif.
PCT/JP2013/068258 2012-07-10 2013-07-03 Module de cellules solaires et son procédé de fabrication WO2014010486A1 (fr)

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KR1020157003030A KR102019310B1 (ko) 2012-07-10 2013-07-03 태양 전지 모듈 및 그의 제조 방법

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WO2017043518A1 (fr) * 2015-09-08 2017-03-16 デクセリアルズ株式会社 Procédé de fabrication de module de batterie solaire, module de batterie solaire, et procédé de connexion de cellules de batterie solaire
CN107170841B (zh) * 2017-06-07 2021-01-22 苏州携创新能源科技有限公司 太阳能电池光伏模块及太阳能电池光伏组件
CN109346560A (zh) * 2018-11-27 2019-02-15 江苏拓正茂源新能源有限公司 一种太阳能电池芯的制备方法
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WO2009019929A1 (fr) * 2007-08-09 2009-02-12 Mitsubishi Electric Corporation Panneau de batterie solaire
JP2009054981A (ja) * 2007-08-02 2009-03-12 Sanyo Electric Co Ltd 太陽電池モジュール及びその製造方法
JP2011159725A (ja) * 2010-01-29 2011-08-18 Toppan Printing Co Ltd 太陽電池モジュール用基材とその製造方法、太陽電池モジュール
JP2012038777A (ja) * 2010-08-03 2012-02-23 Mitsubishi Electric Corp 太陽電池モジュールおよび太陽電池モジュールの製造方法

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JP4697194B2 (ja) * 2006-10-13 2011-06-08 日立化成工業株式会社 太陽電池セルの接続方法及び太陽電池モジュール
CN102132417B (zh) * 2008-08-22 2013-05-15 三洋电机株式会社 太阳能电池模块
JP5446420B2 (ja) 2009-04-21 2014-03-19 デクセリアルズ株式会社 太陽電池モジュール及びその製造方法
JP5158238B2 (ja) * 2010-08-26 2013-03-06 日立化成株式会社 太陽電池電極用接着フィルム及びそれを用いた太陽電池モジュールの製造方法

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JP2005252062A (ja) * 2004-03-05 2005-09-15 Sanyo Electric Co Ltd 太陽電池装置
JP2009054981A (ja) * 2007-08-02 2009-03-12 Sanyo Electric Co Ltd 太陽電池モジュール及びその製造方法
WO2009019929A1 (fr) * 2007-08-09 2009-02-12 Mitsubishi Electric Corporation Panneau de batterie solaire
JP2011159725A (ja) * 2010-01-29 2011-08-18 Toppan Printing Co Ltd 太陽電池モジュール用基材とその製造方法、太陽電池モジュール
JP2012038777A (ja) * 2010-08-03 2012-02-23 Mitsubishi Electric Corp 太陽電池モジュールおよび太陽電池モジュールの製造方法

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JP2014017398A (ja) 2014-01-30
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KR102019310B1 (ko) 2019-09-06
KR20150032889A (ko) 2015-03-30
TW201403843A (zh) 2014-01-16
TWI590482B (zh) 2017-07-01

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