WO2011099228A1 - 太陽電池モジュール及びその製造方法 - Google Patents
太陽電池モジュール及びその製造方法 Download PDFInfo
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- WO2011099228A1 WO2011099228A1 PCT/JP2010/072988 JP2010072988W WO2011099228A1 WO 2011099228 A1 WO2011099228 A1 WO 2011099228A1 JP 2010072988 W JP2010072988 W JP 2010072988W WO 2011099228 A1 WO2011099228 A1 WO 2011099228A1
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- Prior art keywords
- solar cell
- sealing material
- hole
- cell module
- back surface
- Prior art date
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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
- H01L31/02—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
- H01L31/02013—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 output lead wires elements
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- 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 that uses sunlight to generate electric power.
- Conventional solar cell modules include one in which the outermost surface on the light receiving surface side is covered with glass, and one in which the outermost surface is covered with a translucent film.
- a moisture resistant film is disposed on the non-light receiving surface side.
- the moisture resistant film has a structure in which a sealing material and an aluminum foil or a polyester film are sandwiched by a weather resistant film.
- a method of bonding the light transmitting film and the solar cells with a sealing material is employed.
- a back surface support material is disposed on the non-light receiving surface side (for example, Patent Document 1).
- the back surface support material a steel plate, a metal plate such as an aluminum plate or a stainless steel plate, carbon fiber, glass fiber reinforced plastic (FRP), ceramic, glass or the like is used.
- FIG. 12 is a plan view of the conventional solar cell module described in Patent Document 1. As shown in FIG. FIG. 13 is a cross-sectional view taken along line AA of FIG. 12 before laminate molding.
- the conventional solar cell module 31 includes a solar cell 32.
- a surface sealing material 33 and a surface protective material 34 are stacked in this order.
- the back surface (non-light receiving surface) 32 b of the solar battery cell 32 the back surface sealing material 35 and the back surface support material 36 are stacked in this order.
- a through hole 38 for extracting an output terminal is provided in the back surface support member 36.
- the electric output wiring 37 of the solar battery cell 32 extends to the outside of the solar battery module 31 through the through hole 38.
- the through holes 38 are sealed by the through hole sealing material 39 after passing through the electric output wiring 37.
- Patent Document 2 discloses another example of a conventional solar cell module.
- a surface filler and glass (surface protective material) are laminated
- a back surface filling material and a back surface support material (back cover) are laminated in this order.
- a mat member is disposed inside the back surface support at the position of the opening of the back surface support.
- Patent Document 1 the following problems occur when pressing and integrating one with the respective members stacked while heating them with a laminator.
- the solar cell 32 When the laminate molding is performed, as shown in FIG. 14, the solar cell 32 is warped due to the thermal stress, and the back surface sealing material 35 flows into the through hole 38. Then, the end 32 c of the solar battery cell 32 approaches the back surface support member 36, and the distance between the solar battery cell 32 and the back surface support member 36 becomes smaller. Therefore, when a metal plate is used as the back surface support member 36, there is a problem that an insulation failure occurs between the solar battery cell 32 and the back surface support member 36 after the lamination molding.
- the present invention has been made in view of such circumstances, and an object of the present invention is to cause an insulation failure between a solar cell and a back surface support even when the solar cell is warped during lamination molding It is another object of the present invention to provide a solar cell module with enhanced reliability and insulation and a method of manufacturing the same.
- At least a first sealing material and a back support are laminated in this order on one surface side of the solar cell, and the back support is applied to the back support.
- a solar cell module provided with a through hole, the electric output of the solar cell being output to the outside by passing the electric output wiring of the solar cell through the through hole;
- An insulating material is disposed between the solar battery cell and the first sealing material at the corresponding position.
- the insulating material is made of fluorocarbon resin.
- the insulating material is composed of a fluorine resin and a second sealing material, and the fluorine resin is a composition of the first sealing material and the second sealing.
- the second encapsulant is disposed between the solar cell and the solar cell, and the second encapsulant is adhered to the solar cell.
- the solar cell, the first sealing material, the insulating material, and the back surface supporting material are bonded by lamination molding.
- the width of the insulating material is twice or more the through hole diameter of the through hole.
- the thickness of the insulating material is in the range of 5 ⁇ m to 1000 ⁇ m.
- At least a first sealing material and a back support are laminated in this order on one surface side of the solar cell, and the back support is applied to the back support.
- a method of manufacturing a solar cell module comprising: a through hole, the electric output of the solar cell being output to the outside by passing an electric output wire of the solar cell through the through hole. Disposing an insulating material between the solar battery cell and the first sealing material at a position corresponding to the through hole, the solar battery cell, the insulating material, the first sealing material, and the back surface Bonding with a support by lamination.
- the insulating material is made of fluorocarbon resin.
- the insulating material is composed of a fluorocarbon resin and a second sealing material, and the first sealing material and the second sealing material
- the method further includes the steps of: disposing the fluorocarbon resin with a material; and bonding the second sealing material to the solar battery cell.
- the width of the insulating material is twice or more the through hole diameter of the through hole.
- the thickness of the insulating material is in the range of 5 ⁇ m to 1000 ⁇ m.
- the solar cell module of the present invention at least the first sealing material and the back surface support material are laminated in this order on one surface side of the solar battery cell, and the back surface support material is provided with the through holes.
- the solar cell module configured to output the electric output of the solar cell to the outside by passing the electric output wiring of the solar cell through the through hole, the solar cell module in the position corresponding to the through hole Since the insulating material is disposed between the solar battery cell and the first sealing material, the solar battery cell and the back surface are supported even if the end of the solar battery cell is pushed downward at the time of lamination molding An insulating material intervenes between the material and the material, and the insulation is secured. In particular, in the case where a metal plate is used as the back surface support material, it is possible to prevent the insulation failure between the solar battery cell and the back surface seal material even if the back surface sealing material around the through holes becomes thin.
- the solar cell module according to the present invention since the width of the insulating material is twice or more the through hole diameter of the through hole, the solar cell is melted even if the back surface sealing material is melted in lamination molding The insulating material is reliably interposed between the cell and the back surface support material, and the insulating property is secured.
- the thickness of the insulating material is in the range of 5 ⁇ m to 1000 ⁇ m, the back surface sealing material and the insulation at the time of laminate molding are ensured while securing the insulation effect. Degassing between materials can also be performed.
- FIG. 13 is a cross-sectional view taken along line AA of FIG. 12 before laminate molding.
- FIG. 13 is a cross-sectional view taken along line AA of FIG. 12 after laminate molding.
- FIG. 1 is a plan view of a solar cell module according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 before laminate molding.
- a solar module 1 includes a solar battery cell 2. As shown in FIG. 2, on the surface (that is, light receiving surface) 2 a of the solar battery cell 2, a surface sealing material 3 and a surface protective material 4 are stacked in order from the solar battery cell 2 side. In addition, on the back surface (that is, the non-light receiving surface) 2b of the solar battery cell 2, the back surface sealing material (first sealing material) 5 and the back surface support material 6 are stacked in order from the solar battery cell 2 side. ing. Then, the electrical output wiring 7 extends from the solar battery cell 2 to the outside of the solar battery module 1. From such a configuration, the solar cell module 1 is configured such that the electric output of the solar cell 2 is output to the outside.
- the back surface support 6 is provided with a through hole 8 for passing the electrical output wiring 7.
- a through hole sealing material 9 for sealing the through hole 8 is disposed.
- the thickness of the through hole sealing material 9 is larger than the thickness of the back surface support 6.
- the insulating material 10 is disposed between the solar battery cell 2 and the back surface sealing material 5 at a position corresponding to the through hole 8.
- the insulating material 10 is provided with a first slit (cut) 10 a for passing the electric output wiring 7.
- the back surface sealing material 5 is also provided with a second slit (cut) 5 a for passing the electric output wiring 7.
- the through hole sealing material 9 is provided with a wiring through hole 9 a for passing the electric output wiring 7.
- the electric output wiring 7 is provided via the first slit 10 a of the insulating material 10, the second slit 5 a of the back surface sealing material 5, and the wiring through hole 9 a of the through hole sealing material 9. , Extends to the outside of the solar cell module 1.
- the electric output wiring 7 is connected to the photovoltaic cell 2 by conductors, such as solder.
- ethylene-tetrafluoroethylene copolymer ETFE
- polytetrafluoroethylene polytetrafluoroethylene
- tetrafluoroethylene-perfluoroalkoxyvinyl ether copolymer tetrafluoroethylene-hexafluoropropylene co-weight
- fluorocarbon resin film such as combination, polychlorotrifluoroethylene, chlorotrifluoroethylene-ethylene copolymer, polyvinyl fluoride, polyvinylidene fluoride and the like.
- surface oxidation treatment such as corona discharge treatment and plasma polymerization treatment, on the bonding surface between the surface protective material 4 and the surface sealing material 3.
- Ethylene-vinyl acetate copolymer silane-modified polyethylene (silane-modified PE), polyvinyl butyral as the sealants (front-side sealant 3, back-side sealant 5, and sealant for through holes 9) of the present embodiment
- transparent resins such as silicone resins, epoxy resins, and fluorinated polyimides.
- These encapsulants 3, 5 and 9 can be crosslinked by adding a crosslinking agent.
- the back surface sealing material 5 and the through hole sealing material 9 do not necessarily have to be transparent, and may be colored.
- the surface protection material 4 and the surface sealing material 3 disposed on the surface (light receiving surface) 2 a of the solar battery cell 2 it is desirable to use a laminated film or sheet laminated and bonded in advance.
- the thickness t 1 of the through hole for encapsulating material 9 of this embodiment 1.5 to "the same thickness as the thickness t 2 of the back supporting member 6,""back supporting member 6 having a thickness of t 2 A range of up to “double” is preferred (see FIG. 4). If the thickness t 1 of the through-hole for the sealant 9 is thinner than the thickness t 2 of the backing member 6, the rear surface sealing material 5 at the time of lamination molding flows into the through-hole 8, the end portion 2c of the solar cell 2 It is pushed down. As a result, the end 2 c of the solar battery cell 2 approaches the back surface supporting member 6, and the dielectric breakdown voltage between the solar battery cell 2 and the back surface supporting member 6 can not be secured.
- the diameter of the through hole sealing material 9 is preferably in the range from the same length as the through hole diameter of the through hole 8 to the through hole diameter of the through hole 1 mm. If the diameter of the through hole sealing material 9 is larger than the through hole diameter of the through hole 8, the molten through hole sealing material 9 is likely to stick out to the back surface support member 6 at the time of laminate molding, resulting in poor appearance. In addition, when the diameter of the through hole sealing material 9 is smaller than “through hole diameter ⁇ 1 mm”, the back surface sealing material 5 flows into the through hole 8 and the end 2 c of the solar battery cell 2 is pushed downward. As a result, the end 2 c of the solar battery cell 2 approaches the back surface supporting member 6, and the dielectric breakdown voltage between the solar battery cell 2 and the back surface supporting member 6 can not be secured.
- the solar battery cell 2 of the present embodiment is not particularly limited, and a semiconductor pn junction of a single crystal material, a pin junction of a non-single crystal material, or a semiconductor junction such as a Schottky junction is used.
- a semiconductor material a silicon-based compound is used.
- the solar battery cell 2 is made of a flexible material, and is particularly preferably an amorphous silicon (a-Si) semiconductor or a compound semiconductor formed on a stainless steel substrate or a polyimide film substrate.
- the insulating material 10 of the present embodiment is preferably a fluorine resin from the viewpoint of dielectric breakdown voltage, heat resistance and weather resistance.
- polyester, polyimide, cellulose diacetate, cellulose triacetate or the like can be used as a single film.
- the insulating material 10 should use the laminated film or sheet which laminated
- the insulating film sealing material 12 is disposed on the fluorine resin 13. Therefore, the fluorine resin 13 is disposed between the back surface sealing material 5 and the insulating film sealing material 12.
- the insulating film sealing material 12 is laminated and bonded to the fluorine resin 13 in advance.
- the thickness t 3 of the insulating material 10 may be any of about 5 [mu] m ⁇ 1000 .mu.m, more preferably, the thickness t 3 good about 25 [mu] m ⁇ 600 .mu.m. If the thickness t 3 of the insulating material 10 is less 5 [mu] m, because the insulating effect becomes poor because the breakdown voltage is too low. The thickness t 3 is a 1000 ⁇ m greater insulation 10, because the deaeration between the back sealing member 5 at the time of lamination molding is difficult.
- the width (diameter in the case where the insulating material 10 is circular) w 1 of the insulating material 10 may be twice or more of the through hole diameter w 2 of the through hole. If the width w 1 of the insulating material 10 is less than twice the penetration hole diameter w 2, when the rear surface sealing material 5 has melted during lamination molding, the end portion of the insulating member 10 will be pushed down downward. Thereby, the end 2c of the solar battery cell 2 approaches the back surface supporting member 6, and the dielectric breakdown voltage can not be secured.
- an ethylene-tetrafluoroethylene copolymer As a fluorine resin used for the insulating material 10, an ethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, poly Fluororesin films such as chlorotrifluoroethylene, chlorotrifluoroethylene-ethylene copolymer, polyvinyl fluoride, polyvinylidene fluoride and the like can be used.
- polyester films such as a polyethylene terephthalate, a polybutylene terephthalate, a polyethylene naphthalate, a poly trimethylene terephthalate, a polybutylene naphthalate, can be used.
- the insulating film sealing material 12 is ethylene-vinyl acetate copolymer, silane-modified polyethylene (silane-modified PE), polyvinyl butyral, silicone resin, epoxy resin, fluorinated polyimide in order to adhere to the solar battery cell 2 Transparent resin can be used.
- the insulating film sealing material 12 can be crosslinked by adding a crosslinking agent. Further, it is desirable that the insulating film sealing material 12 contain an ultraviolet light absorber and a light stabilizer in order to suppress light deterioration.
- the insulating film sealing material 12 does not necessarily have to be transparent, and may be colored.
- the adhesive for bonding the solar battery cell 2 and the insulating material 10 is not particularly limited, and a silicone resin, an epoxy resin, a polyurethane resin or the like can be used.
- a galvanized steel plate As the back surface supporting member 6 of the present embodiment, a galvanized steel plate, a gal barium steel plate, an aluminum plate, a metal plate such as a stainless steel plate, a plastic plate, an FRP plate or the like can be used.
- the electric output wiring 7 of the present embodiment is a metal such as copper, aluminum, stainless steel, nickel or the like, preferably in the form of a foil and covered with solder without exposing the metal surface.
- FIG. 4 is an exploded perspective view showing the stacking arrangement of each member in the method of manufacturing a solar cell module according to the embodiment of the present invention.
- FIG. 5 is a cross-sectional view showing the stacking arrangement of each member in the method of manufacturing a solar cell module according to the embodiment of the present invention.
- the surface sealing material 3 and the surface protection material 4 are arrange
- the insulating material 10 As shown in FIG.
- the electrical output wiring 7 is connected to the solar battery cell 2 via a conductor.
- the electrical output wiring 7 extends to the outside of the solar cell module 1 through the first slits 10 a of the insulating material 10, the second slits 5 a of the back surface sealing material 5, and the through holes 8 of the back surface support 6. ing.
- the adhesive for temporary fixing is used to prevent the molten sealing material 9 for through holes from sticking out of the through holes 8 of the back surface support 6.
- the tape 14 is pasted so as to cover the through hole 8. In this state, laminate molding is performed.
- FIG. 6 is a schematic plan view showing the attachment structure of the electrical output wiring to the solar battery cell.
- FIG. 7 is a schematic plan view showing a connection structure of solar cell modules in which a plurality of solar cells are arranged in series.
- FIG. 8 is an exploded perspective view showing the stacking arrangement of each member in the method of manufacturing a solar cell module according to the embodiment of the present invention.
- FIG. 9 is a cross-sectional view of the solar cell module before laminate molding.
- the solar cell module 1 of this embodiment uses the a-Si solar cell 2 produced on a film substrate. Moreover, as the back surface supporting member 6, a galvary steel plate is used.
- the film substrate a-Si solar battery cell 2 uses a substrate of a polyimide film having a thickness of 0.05 mm. A plurality of solar cell elements are connected in series to one surface of the substrate. Further, as shown in FIG. 6, the positive electrode extraction electrode 21 and the negative electrode extraction electrode 22 are formed on the non-light receiving surface side which is the other surface of the substrate.
- ETFE ethylene-tetrafluoroethylene
- silane modified polyethylene having a thickness of 0.04 mm is unrolled from the roll film and cut into a predetermined size.
- the surface sealing material 3 is disposed on the surface protective material 4.
- the surface protective material 4 and the surface sealing material 3 are laminated and bonded in advance to form an ETFE / silane-modified polyethylene (silane-modified PE) laminated film.
- the electrical output wiring 7 is made of copper foil coated with solder, the thickness of the copper foil is 0.1 mm, and the width of the copper foil is 2 mm.
- a conductive adhesive tape 23 having a width of 8 mm is formed on the positive electrode lead-out electrode 21 for extracting a portion 7a of the electric output wiring 7 beforehand. Use to fix.
- the other portion 7b of the electric output wiring 7 is bent perpendicularly to the film substrate a-Si solar cell 2 at a position corresponding to the through hole.
- fixing and bending of the electric output wiring 7 are similarly performed on the negative electrode extraction electrode 22 as well.
- the film substrate a-Si solar battery cell 2 as described above is disposed on the surface sealing material 3 with the light receiving surface facing down.
- the insulating material 10 is disposed on the film substrate a-Si solar battery cell 2 at a position corresponding to the through hole 8.
- This insulating material 10 is used by cutting out ETFE of 0.025 mm thickness used as the surface protective material 4 and silane modified PE film of 0.4 mm thickness used as the surface sealing material 3 to a diameter of 28 mm.
- the insulating material 10 is formed by laminating and bonding the ETFE / silane-modified PE laminate film used in the surface protective material 4 and the surface sealing material 3 in advance.
- the manufacturing process can be simplified.
- such lamination bonding is desirable also from the viewpoint of reliability.
- a first slit 10 a having a length of 20 mm is formed in a cross shape at a position corresponding to the terminal extraction portion of the electric output wiring 7.
- the first slit 10a of the insulating material 10 is produced in advance by applying a blade on a flat plate.
- the electrical output wiring 7 of the solar battery cell 2 is disposed on the non-light receiving surface side of the solar battery cell 2 through the first slit 10 a.
- a 0.4 mm thick silane-modified PE film is used by unwinding from a roll film.
- a second slit 5a having a length of 80 mm is formed at a position corresponding to the terminal extraction portion.
- the second slit 5a of the back surface sealing material 5 is produced in advance by applying a blade on a flat plate.
- the electric output wiring 7 of the solar battery cell 2 is disposed on the non-light receiving surface side of the solar battery cell 2 through the first slit 10 a of the insulating material 10 and the second slit 5 a of the back surface sealing material 5.
- a 0.8-mm thick fluorocarbon resin-coated galvanic steel plate (Sanflon 20GL Cool, manufactured by Nippon Steel & Sumitomo Metal Co., Ltd.) is used. As shown in FIGS. 8 and 9, this steel plate is cut in advance to a predetermined size, and a through hole 8 having a diameter of 10 mm is provided at a position corresponding to the terminal extraction portion.
- a primer for acrylic resin-based electrodeposition coated aluminum Tosprime New F, Momentive Performance Materials Japan made
- the primer is coated on a flat plate using a roll coater to a thickness of about 1 ⁇ m and dried at room temperature for 30 minutes or more.
- the through hole sealing material 9 a silane-modified PE film having a thickness of 0.4 mm is used. This film is cut out to a diameter of 9.5 mm and used.
- the through hole sealing material 9 is provided with a wiring through hole 9 a with a diameter of 5 mm for passing the electric output wiring 7 at the center.
- the wiring through holes 9 a of the through hole sealing material 9 are prepared by bringing a blade into contact with a flat plate in advance to cut out the through hole sealing material 9.
- the through hole sealing material 9 is disposed in two layers in the through hole 8 of the back surface support 6. At this time, the electrical output wiring 7 of the solar battery cell 2 is disposed so as to penetrate the wiring through hole 9 a of the through hole sealing material 9.
- lamination molding is performed on the members stacked and arranged as shown in FIG.
- the lamination is performed in a vacuum heat compression manner at a temperature of 140 ° C. to 150 ° C. for 5 to 25 minutes.
- FIG. 10 shows a cross-sectional view of the solar cell module 1 after laminate molding.
- FIG. 9 Before laminate molding, as shown in FIG. 9, there is a space between the front surface sealing material 3 and the rear surface sealing material 5 due to the insulating material 10. If lamination molding is performed in this state, as shown in FIG. 10, the front surface sealing material 3 and the rear surface sealing material 5 melt, and the front surface sealing material 3 and the rear surface sealing material 5 adhere closely to the insulating material 10. It will be. Thereby, the space between the front surface sealing material 3 and the back surface sealing material 5 is sealed.
- the pressure-sensitive adhesive tapes 14A and 14B for temporary fixation of fluororesin are peeled off.
- a terminal box (not shown) with a wiring cable is bonded to the surface of the back surface support 6 using a one-component moisture curing silicone resin (KE-45T, manufactured by Shin-Etsu Chemical Co., Ltd.).
- the terminal box is made of modified polyphenylene ether (Noryl PX9406, manufactured by SABIC Innovative Plastics Japan).
- the electrical output wiring 7 is soldered to the terminal block of the terminal box.
- a two-part curable silicone resin (KE-200 / CX-200, manufactured by Shin-Etsu Chemical Co., Ltd.) is used as the insulating sealing material of the portion to which the electric output wiring 7 is attached. This insulating sealing material is injected into the wiring portion of the electrical output wiring 7 and a lid is attached to the terminal box.
- the solar cell module 1 is manufactured by the above flow.
- FIG. 11 is a cross-sectional view taken along line AA of FIG. 1 after laminate molding.
- a space is formed between the front surface sealing material 3 and the rear surface sealing material 5 by the insulating material 10.
- the front surface sealing material 3 and the rear surface sealing material 5 are melted, and the front surface sealing material 3 and the rear surface sealing material 5 adhere to the insulating material 10. It will be. Thereby, the space between the front surface sealing material 3 and the back surface sealing material 5 is sealed.
- FIG. 11 even if the end 2 c of the solar battery cell 2 is pushed downward after lamination molding, insulation is provided between the solar battery cell 2 and the back surface support 6. The material 10 intervenes to ensure insulation.
- the back surface sealing material 5 and the back surface support material 6 are stacked in this order on the back surface 2 b of the solar battery cell 2.
- the solar cell module 1 provided with 8 and configured such that the electric output of the solar cell 2 is output to the outside by passing the electric output wiring 7 of the solar cell 2 through the through hole 8, Since the insulating material 10 is disposed between the solar battery cell 2 and the back surface sealing material 5 at the corresponding position, even if the end 2 c of the solar battery cell 2 is pushed downward at the time of laminate molding, The insulating material 10 intervenes between the solar battery cell 2 and the back surface supporting material 6 to ensure insulation. In particular, when a metal plate is used as the back surface support 6, even if the back surface sealing material 5 around the through holes 8 becomes thin, insulation failure between the solar battery cell 2 and the back surface support 6 can be prevented. .
- the solar cell module 1 which concerns on this embodiment, since width w 1 of the insulating material 10 is 2 times or more of the through-hole diameter of the through-hole 8, the back surface sealing material 5 fuses in lamination molding. Even in this case, the insulating material 10 is reliably interposed between the solar battery cell 2 and the back surface supporting member 6, and the insulation property is secured.
- the thickness t 3 of the insulating material 10 because it is a thickness in the range of 5 [mu] m ⁇ 1000 .mu.m, while ensuring insulation effect, the rear surface sealing during lamination molding Degassing between the stopper 5 and the insulating material 10 can also be performed.
- the solar cell module 1 since the laminate adhesion laminated film of the surface protective material 4 and the surface sealing material 3 is used as the insulating material 10, the solar cell module 1 is not reduced in reliability. Can be manufactured.
- the insulating material 10 is disposed between the solar battery cell 2 and the back surface sealing material 5 at the position of the through hole 8 and lamination molding is performed, the back surface sealing material 5 flows into the through hole 8 and the solar There is no possibility that the end 2 c of the battery cell 2 approaches the back support 6. Therefore, the electrical characteristics of the solar cell module 1 can be further improved.
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Abstract
Description
裏面支持材としては、鋼板、アルミ板、ステンレス鋼板などの金属板、又はカーボンファイバー、ガラス繊維強化プラスチック(FRP)、セラミック、ガラスなどが用いられている。
このような太陽電池モジュール31において電気出力を取出す構成として、裏面支持材36には、出力端子取出用の貫通孔38が設けられている。そして、この貫通孔38を通って太陽電池セル32の電気出力配線37が太陽電池モジュール31の外部まで延在している。なお、貫通孔38は、電気出力配線37を通した後に貫通孔用封止材39により封止されている。
このような構成から、太陽電池モジュール1は、太陽電池セル2の電気出力が外部に出力されるように構成されている。
本実施形態において、電気出力配線7は、絶縁材10の第1のスリット10aと裏面封止材5の第2のスリット5aと貫通孔用封止材9の配線用貫通孔9aとを介して、太陽電池モジュール1の外部まで延在している。また、電気出力配線7は、半田などの導体により太陽電池セル2に接続されている。
また、貫通孔用封止材9の厚さt1が裏面支持材6の厚さt2の1.5倍より厚いと、ラミネート成型時に貫通孔用封止材9が裏面封止材5を介して表面封止材3を押上げてしまう。これにより、貫通孔8に対応する位置の表面封止材3が薄くなり、太陽電池セル2と表面保護材4との間の絶縁破壊電圧の確保ができなくなる。
また、貫通孔用封止材9の直径が、「貫通孔径-1mm」より小さいと、貫通孔8に裏面封止材5が流れ込み、太陽電池セル2の端部2cが下方に押下げられる。これにより、太陽電池セル2の端部2cが裏面支持材6に接近し、太陽電池セル2と裏面支持材6との間の絶縁破壊電圧の確保ができなくなる。
また、絶縁材10のポリエステルとしては、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、ポリトリメチレンテレフタレート、ポリブチレンナフタレートなどのポリエステルフィルムを用いることができる。
この絶縁膜用封止材12は、架橋剤を添加することにより架橋させることができる。また、絶縁膜用封止材12には、光劣化を抑制するために、紫外線吸収剤および光安定剤が含有されていることが望ましい。絶縁膜用封止材12は、必ずしも透明である必要はなく、着色したものを用いてもよい。さらに、太陽電池セル2と絶縁材10を接着させるための接着剤としては、特に限定はなく、シリコーン樹脂、エポキシ樹脂、ポリウレタン樹脂などを用いることができる。
電気出力配線7は、導体を介して太陽電池セル2に接続されている。電機出力配線7は、絶縁材10の第1のスリット10aと裏面封止材5の第2のスリット5aと裏面支持材6の貫通孔8とを通って太陽電池モジュール1の外部まで延在している。
図6は、太陽電池セルへの電気出力配線の取付け構造を示す概略平面図である。図7は、複数の太陽電池セルを直列に配置した太陽電池モジュールの接続構造を示す概略平面図である。図8は、本発明の実施形態に係る太陽電池モジュールの製造方法において、各部材の積層配置を示した分解斜視図である。図9は、ラミネート成型前の太陽電池モジュールの断面図である。
次に、表面封止材3として、0.04mm厚のシラン変性ポリエチレンをロール状フィルムから巻きだし、所定のサイズに裁断する。そして、図8に示すように、表面封止材3を表面保護材4上に配置する。表面保護材4と表面封止材3とは、あらかじめラミネート接着して、ETFE/シラン変性ポリエチレン(シラン変性PE)ラミネートフィルムとする。これにより、製造工程を簡素化することができる。
また、図6に示すように、電気出力配線7の他方の部分7bは、貫通孔に対応する位置で、フィルム基板a-Si太陽電池セル2に対し垂直に折り曲げておく。図示はされていないが、負極取出し電極22に対しても同様に、電気出力配線7の固定および折り曲げ加工が行われる。
図7に示すように、最も正極側になる太陽電池セル2Aの正極取出し電極21A上と、最も負極側になる太陽電池セル2Bの負極取出し電極22B上に前述と同様の方法を用いて電気出力配線7を取付ける。
太陽電池セル2A,2Bを並列に配置した後、隣り合う太陽電池セル2A,2B間の負極取出し電極22Aと正極取出し電極21Bとを架け渡すように電気出力配線(半田で被覆された銅箔)7を配置する。この電気出力配線7の全面は、導電性粘着テープ23を用いて覆われており、電気出力配線7は、負極取出し電極22Aと正極取出し電極21Bとに固定されている。
絶縁材10は、表面保護材4および表面封止材3で用いたETFE/シラン変性PEラミネートフィルムをあらかじめラミネート接着することにより形成されている。これにより、製造工程を簡素化することができる。また、このようにラミネート接着することは、信頼性の観点からも望ましい。
貫通孔用封止材9は、裏面支持材6の貫通孔8に2枚重ねて配置される。この際、太陽電池セル2の電気出力配線7が、貫通孔用封止材9の配線用貫通孔9aを貫通するように配置される。
ラミネート成型前では、図9に示すように、絶縁材10により表面封止材3と裏面封止材5との間に空間がある。この状態でラミネート成型を行うと、図10に示すように、表面封止材3及び裏面封止材5が溶融し、表面封止材3及び裏面封止材5は、絶縁材10と密着することになる。これにより、表面封止材3と裏面封止材5との間の空間は密閉される。
以上のような流れにより太陽電池モジュール1が製造される。
ラミネート成型前では、図1に示すように、絶縁材10により表面封止材3と裏面封止材5との間に空間が形成されている。この状態でラミネート成型を行うと、図11に示すように、表面封止材3及び裏面封止材5が溶融し、表面封止材3及び裏面封止材5は、絶縁材10と密着することになる。これにより、表面封止材3と裏面封止材5との間の空間は密閉される。また、本実施形態によれば、図11に示すように、ラミネート成型後に太陽電池セル2の端部2cが下方に押下げられても、太陽電池セル2と裏面支持材6との間に絶縁材10が介在することになり、絶縁性が確保される。
2 太陽電池セル
3 表面封止材
4 表面保護材
5 裏面封止材
6 裏面支持材
7 電気出力配線
8 貫通孔
9 貫通孔用封止材
10 絶縁材
12 絶縁膜用封止材
13 フッ素樹脂
14A,14B フッ素樹脂粘着テープ
Claims (11)
- 太陽電池セルの一面側には、少なくとも第1の封止材と裏面支持材とが当該順で積層され、前記裏面支持材には、貫通孔が設けられ、前記太陽電池セルの電気出力配線を前記貫通孔に通すことにより前記太陽電池セルの電気出力が外部に出力されるように構成された太陽電池モジュールにおいて、
前記貫通孔に対応する位置における前記太陽電池セルと前記第1の封止材との間には、絶縁材が配置されていることを特徴とする太陽電池モジュール。 - 前記絶縁材が、フッ素樹脂からなることを特徴とする請求項1に記載の太陽電池モジュール。
- 前記絶縁材が、フッ素樹脂と第2の封止材とから構成され、前記フッ素樹脂が、前記第1の封止材と前記第2の封止材との間に配置され、前記第2の封止材が前記太陽電池セルに接着されていることを特徴とする請求項1に記載の太陽電池モジュール。
- 前記太陽電池セルと前記第1の封止材と前記絶縁材と前記裏面支持材とがラミネート成型により接着されていることを特徴とする請求項1ないし3のいずれか一項に記載の太陽電池モジュール。
- 前記絶縁材の幅は、前記貫通孔の貫通孔径の2倍以上になっていることを特徴とする請求項1ないし4のいずれか一項に記載の太陽電池モジュール。
- 前記絶縁材の厚さは、5μm~1000μmの範囲の厚さであることを特徴とする請求項1ないし5のいずれか一項に記載の太陽電池モジュール。
- 太陽電池セルの一面側には、少なくとも第1の封止材と裏面支持材とが当該順で積層され、前記裏面支持材には、貫通孔が設けられ、前記太陽電池セルの電気出力配線を前記貫通孔に通すことにより前記太陽電池セルの電気出力が外部に出力されるように構成された太陽電池モジュールの製造方法において、
前記貫通孔に対応する位置における前記太陽電池セルと前記第1の封止材との間に絶縁材を配置するステップと、
前記太陽電池セルと前記絶縁材と前記第1の封止材と前記裏面支持材とをラミネート成型により接着するステップと
を含むことを特徴とする太陽電池モジュールの製造方法。 - 前記絶縁材が、フッ素樹脂からなることを特徴とする請求項7に記載の太陽電池モジュールの製造方法。
- 前記絶縁材が、フッ素樹脂と第2の封止材とから構成されており、
前記第1の封止材と前記第2の封止材との間に前記フッ素樹脂を配置するステップと、
前記第2の封止材を前記太陽電池セルに接着するステップと
を更に含むことを特徴とする請求項7に記載の太陽電池モジュールの製造方法。 - 前記絶縁材の幅は、前記貫通孔の貫通孔径の2倍以上になっていることを特徴とする請求項7ないし9のいずれか一項に記載の太陽電池モジュールの製造方法。
- 前記絶縁材の厚さは、5μm~1000μmの範囲の厚さであることを特徴とする請求項7ないし10のいずれか一項に記載の太陽電池モジュールの製造方法。
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CN201080061189.5A CN102714242A (zh) | 2010-02-09 | 2010-12-21 | 光伏模块及其制造方法 |
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WO2018062185A1 (ja) * | 2016-09-29 | 2018-04-05 | 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および太陽電池モジュールの製造方法 |
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- 2010-12-21 WO PCT/JP2010/072988 patent/WO2011099228A1/ja active Application Filing
- 2010-12-21 US US13/522,318 patent/US20130019926A1/en not_active Abandoned
- 2010-12-21 EP EP10845818A patent/EP2535943A1/en not_active Withdrawn
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2013
- 2013-02-18 JP JP2013028795A patent/JP2013093625A/ja active Pending
Patent Citations (3)
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JP2001007375A (ja) * | 1999-06-18 | 2001-01-12 | Fuji Electric Co Ltd | 太陽電池モジュールとその設置方法 |
JP2004327698A (ja) * | 2003-04-24 | 2004-11-18 | Fuji Electric Holdings Co Ltd | 太陽電池モジュールおよびその製造方法 |
JP2006049651A (ja) * | 2004-08-05 | 2006-02-16 | Fuji Electric Holdings Co Ltd | ラミネート処理装置および方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2795678A1 (de) * | 2011-12-20 | 2014-10-29 | Saint-Gobain Glass France | Solarmodul mit abdichtelement |
WO2018062185A1 (ja) * | 2016-09-29 | 2018-04-05 | 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および太陽電池モジュールの製造方法 |
Also Published As
Publication number | Publication date |
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CN102714242A (zh) | 2012-10-03 |
JP2013093625A (ja) | 2013-05-16 |
JPWO2011099228A1 (ja) | 2013-06-13 |
US20130019926A1 (en) | 2013-01-24 |
EP2535943A1 (en) | 2012-12-19 |
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