WO2012053329A1 - Feuille de câblage, cellule solaire avec feuille de câblage, module de cellules solaires, cellule solaire, et procédés de fabrication de cellule solaire avec feuille de câblage ainsi que de module de cellules solaires - Google Patents

Feuille de câblage, cellule solaire avec feuille de câblage, module de cellules solaires, cellule solaire, et procédés de fabrication de cellule solaire avec feuille de câblage ainsi que de module de cellules solaires Download PDF

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Publication number
WO2012053329A1
WO2012053329A1 PCT/JP2011/072033 JP2011072033W WO2012053329A1 WO 2012053329 A1 WO2012053329 A1 WO 2012053329A1 JP 2011072033 W JP2011072033 W JP 2011072033W WO 2012053329 A1 WO2012053329 A1 WO 2012053329A1
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WO
WIPO (PCT)
Prior art keywords
wiring sheet
wiring
solar battery
resin
battery cell
Prior art date
Application number
PCT/JP2011/072033
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English (en)
Japanese (ja)
Inventor
義哉 安彦
康志 舩越
岡田　英生
安紀子 常深
泰史 道祖尾
塁 三上
亮 秋永
今瀧　智雄
Original Assignee
シャープ株式会社
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Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012053329A1 publication Critical patent/WO2012053329A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • 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 wiring sheet, a solar cell with a wiring sheet, a solar cell module, a solar cell, a method for manufacturing a solar cell with a wiring sheet, and a method for manufacturing a solar cell module.
  • solar cells that convert solar energy into electrical energy have been rapidly expected as next-generation energy sources.
  • solar cells such as those using compound semiconductors and those using organic materials, but currently, solar cells using silicon crystals are the mainstream.
  • the most manufactured and sold solar cells have an n-electrode formed on the surface on which sunlight is incident (light-receiving surface), and a p-electrode on the surface opposite to the light-receiving surface (back surface). It is a double-sided electrode type solar cell having the formed structure.
  • Patent Document 1 Japanese Patent Laid-Open No. 2005-340362 discloses a back electrode type solar battery in which no electrode is formed on the light receiving surface of a solar battery cell, and an n electrode and a p electrode are formed only on the back face of the solar battery cell. A cell is disclosed.
  • Patent Document 1 discloses a technique for electrically connecting the electrode of the back electrode type solar cell and the wiring of the wiring sheet.
  • Patent Document 2 (WO2009 / 060753) discloses a technique of electrically connecting electrodes of a back electrode type solar battery cell and wiring of a wiring sheet by directly contacting them.
  • Patent Document 2 discloses a technique in which a back electrode type solar cell is temporarily fixed to a wiring sheet with a fixing tape and then sealed with a sealing material between a transparent substrate and a protective sheet.
  • Patent Document 2 the back electrode type solar cell and the wiring sheet are sealed with a sealing material, and the electrode of the back electrode type solar cell and the wiring of the wiring sheet are pressure-bonded by the fixing force of the sealing material. Direct contact.
  • Patent Document 1 development of a technique for connecting an electrode and a wiring with a conductive material such as solder has been advanced.
  • an insulating resin containing conductive particles such as solder applied to an electrode or wiring by heating an insulating resin containing conductive particles such as solder applied to an electrode or wiring, the conductive particles are melted and aggregated and then cooled and solidified.
  • the electrode and the wiring are electrically connected by the conductive material, and the insulating resin is applied to the region between the substrate region between the electrodes of the back electrode type solar battery cell and the insulating base material region between the wirings of the wiring sheet.
  • Development of a technique for mechanically connecting a back electrode type solar battery cell and a wiring sheet by extruding and curing is also in progress.
  • the electrode and the wiring can be electrically connected by the conductive material, and it is possible to suppress the direct application of stress to the electrode of the back electrode type solar battery cell and the wiring of the wiring sheet. . Therefore, this technique is attracting attention as a technique for connecting electrodes and wirings for solar cell modules that require a large current and high reliability.
  • a solar cell module produced by performing the following steps (1) to (5) in this order is a preferred mode solar cell module.
  • (1) A step of installing an insulating resin containing conductive particles on the electrode of the solar battery cell and / or the wiring of the wiring sheet.
  • (2) The process of aligning a photovoltaic cell and a wiring sheet so that the electrode of a photovoltaic cell faces the predetermined position of the wiring of a wiring sheet.
  • a fixing resin such as a fluid transparent resin or an ultraviolet curable resin between the solar cell and the wiring sheet, these resins are applied to the electrodes of the solar cell and the wiring of the wiring sheet.
  • the solar cells and the wiring sheet are sealed with a sealing material, and the conductive particles including the conductive particles installed between the solar cells and the wiring sheet are heated to melt the conductive particles. Then, the conductive material that is cooled and solidified after agglomeration aggregates between the electrode and the wiring to obtain an electrical connection, and the molten insulating resin is a wiring between the electrode of the solar battery cell and the wiring sheet
  • the fixing resin arranged in the step (3) flows and the fixing resin comes into contact with the insulating resin containing the conductive particles arranged in the step (1), the conductive resin contains the conductive particles. Since the insulating resin is also uncured, it is mixed with the fixing resin. For this reason, there is a problem that the conductive particles in the insulating resin flow out between the electrodes of the solar battery cell and / or between the wirings of the wiring sheet through the fixing resin and short-circuit between the electrodes and / or the wirings. It was. In this case, the stability of mechanical connection between the solar battery cell and the wiring sheet is also impaired.
  • the object of the present invention is to improve the stability of the mechanical connection between the solar cell and the wiring sheet, and to electrically connect the electrode of the solar cell and the wiring of the wiring sheet.
  • a wiring sheet a solar battery cell with a wiring sheet, a solar battery module, a solar battery cell, a manufacturing method of a solar battery cell with a wiring sheet, and a manufacturing method of a solar battery module that can improve the stability of simple connection is there.
  • the present invention is a wiring sheet including an insulating base material and wiring provided on at least one surface of the insulating base material, wherein the wiring faces a peripheral portion of a solar battery cell installed on the wiring sheet.
  • the wiring sheet has a depression in at least a part of the area of the wiring sheet.
  • the depression is preferably a region where the surface of the insulating substrate is exposed and surrounded by the wiring.
  • the present invention is installed between the above-described wiring sheet, a solar cell having the substrate and an electrode provided on at least one surface of the substrate, and the wiring of the wiring sheet and the electrode of the solar cell.
  • a conductive sheet, and a fixing resin that mechanically connects the wiring sheet and the solar battery cell, and the fixing resin is a solar with wiring sheet provided in a recess so as to contact the peripheral edge of the solar battery cell. It is a battery cell.
  • the fixing resin is preferably an insulating resin that is cured by at least one of ultraviolet irradiation and heating.
  • this invention is a solar cell module containing the said photovoltaic cell with a wiring sheet.
  • the present invention is a solar battery cell including a substrate and an electrode provided on at least one surface of the substrate, wherein the resin flows in at least a part of the region between the electrode and the peripheral edge of the solar battery cell. It is a solar cell provided with a blocking part.
  • the resin flow blocking portion is preferably formed of the same material as the electrode.
  • the present invention provides a wiring sheet having the above-described solar battery cell, an insulating base material, and a wiring provided on at least one surface of the insulating base material, wiring of the wiring sheet, and an electrode of the solar battery cell.
  • a fixing resin that mechanically connects the wiring sheet and the solar battery cell, and the fixing resin is positioned outside the resin flow blocking portion of the solar battery cell. It is a photovoltaic cell with a wiring sheet provided on the wiring sheet.
  • the fixing resin is preferably an insulating resin that is cured by at least one of ultraviolet irradiation and heating.
  • this invention is a solar cell module produced using said photovoltaic cell with a wiring sheet.
  • this invention has a photovoltaic cell which has a board
  • a solar cell with a wiring sheet comprising: a wiring sheet; a conductive material installed between the wiring of the wiring sheet and an electrode of the solar battery cell; and a fixing resin that mechanically connects the wiring sheet and the solar battery cell.
  • a method for manufacturing a cell comprising a step of installing a resin containing conductive particles between an electrode of a solar battery cell and a wiring of a wiring sheet, and between the electrode of the solar battery cell and the wiring of the wiring sheet
  • a step of installing a resin containing conductive particles on the substrate, a step of aligning the solar cell and the wiring sheet so that the electrode of the solar cell faces the wiring of the wiring sheet, and the peripheral portion of the solar cell At least one Between the region and the wiring sheet, a step of installing a fixing resin with a gap between the resin containing conductive particles, a step of curing the fixing resin, a step of curing the resin containing conductive particles, It is a manufacturing method of the photovoltaic cell with a wiring sheet containing this.
  • the conductive particles formed by solidifying after the conductive particles melt and aggregate in the step of curing the resin containing conductive particles, the conductive particles formed by solidifying after the conductive particles melt and aggregate. It is preferable that the electrode and the wiring are electrically connected by a substance.
  • the step of curing the fixing resin includes a step of curing the fixing resin by at least one of ultraviolet irradiation and heating.
  • the present invention includes a solar battery cell having a substrate and an electrode provided on at least one surface of the substrate, and a wiring provided on at least one surface of the insulating base material and the insulating base material.
  • wiring sheet including wiring sheet, conductive material installed between wiring of wiring sheet and electrode of solar battery cell, and fixing resin for mechanically connecting wiring sheet and solar battery cell
  • a method for producing a solar cell module in which solar cells are sealed with a sealing material the step of installing a resin containing conductive particles between the electrodes of the solar cells and the wiring of the wiring sheet; The step of aligning the solar cell and the wiring sheet so that the electrode of the solar cell faces the wiring of the wiring sheet, and between the wiring sheet and at least a partial region of the peripheral edge of the solar cell, Guidance
  • the solar cell temporarily fixed to the wiring sheet in the step of installing the fixing resin at intervals, the step of curing the fixing resin, and the step of curing the fixing resin is sealed with a sealing material.
  • the step of sealing with a sealing material is a method
  • the stability of the mechanical connection between the solar battery cell and the wiring sheet can be improved, and the stability of the electrical connection between the electrode of the solar battery cell and the wiring of the wiring sheet is improved.
  • a wiring sheet, a solar battery cell with a wiring sheet, a solar battery module, a solar battery cell, a method for manufacturing a solar battery cell with a wiring sheet, and a method for manufacturing a solar battery module can be provided.
  • FIG. (A)-(e) is typical sectional drawing illustrating the manufacturing method of the solar cell module of Embodiment 1.
  • FIG. (A)-(g) is typical sectional drawing illustrating about an example of the manufacturing method of the back electrode type photovoltaic cell used by this Embodiment. It is a typical enlarged plan view of the surface of the wiring installation side of the wiring sheet used by this Embodiment.
  • (A)-(d) is typical sectional drawing illustrated about an example of the manufacturing method of the wiring sheet used by this Embodiment.
  • FIG. 3 is a schematic enlarged plan view illustrating an example of an installation location of a fixing resin in the first embodiment.
  • (A)-(e) is typical sectional drawing illustrating the manufacturing method of the solar cell module of Embodiment 2.
  • FIG. It is a typical enlarged plan view of the back surface of the back electrode type solar cell used in the present embodiment.
  • FIG. 10 is a schematic enlarged plan view illustrating an example of an installation location of a fixing resin in
  • FIG. 1A a back electrode type solar cell 8 and a wiring sheet 10 are prepared and provided on the back surface of the substrate 1 which is at least one surface of the back electrode type solar cell 8. Insulating resin 20 containing conductive particles 21 is placed on n-type electrode 6 and p-type electrode 7.
  • a back electrode type photovoltaic cell is used as a photovoltaic cell is demonstrated, it is not limited to a back electrode type photovoltaic cell.
  • Examples of the installation method of the insulating resin 20 including the conductive particles 21 include screen printing, dispenser coating, and inkjet coating.
  • thermosetting and / or photocurable resin such as a conventionally known epoxy resin can be used, for example.
  • the insulating resin 20 may contain an additive such as a conventionally known curing agent.
  • solder particles containing at least one of tin and bismuth can be used.
  • the n-type electrode 6 and the p-type electrode 7 of the back electrode type solar cell 8 are respectively opposed to the n-type wiring 12 and the p-type wiring 13 provided on the insulating substrate 11 of the wiring sheet 10.
  • the peripheral edge portion 31 of the back electrode type solar cell 8 is opposed to the recess 32 provided in the connection wiring 14 of the wiring sheet 10.
  • the depression 32 is a region where the surface of the insulating base material 11 is exposed from the connection wiring 14 and is surrounded by the connection wiring 14.
  • the back electrode type solar cell 8 can be manufactured as follows, for example.
  • an example of a method for manufacturing the back electrode type solar cell 8 used in the present embodiment will be described with reference to the schematic cross-sectional views of FIGS.
  • a substrate 1 is prepared in which slice damage 1a is formed on the surface of the substrate 1, for example, by slicing from an ingot.
  • the substrate for example, a silicon substrate made of polycrystalline silicon, single crystal silicon, or the like having either n-type or p-type conductivity can be used.
  • the slice damage 1a on the surface of the substrate 1 is removed.
  • the removal of the slice damage 1a is performed, for example, when the substrate 1 is made of the above silicon substrate, the surface of the silicon substrate after the above slicing is mixed with an aqueous solution of hydrogen fluoride and nitric acid or an alkali such as sodium hydroxide. It can be performed by etching with an aqueous solution or the like.
  • the size and shape of the substrate 1 after removal of the slice damage 1a are not particularly limited, but the thickness of the substrate 1 can be set to, for example, 50 ⁇ m or more and 400 ⁇ m or less, and particularly preferably about 160 ⁇ m.
  • an n-type impurity diffusion region 2 and a p-type impurity diffusion region 3 are formed on the back surface of the substrate 1, respectively.
  • the n-type impurity diffusion region 2 can be formed, for example, by a method such as vapor phase diffusion using a gas containing n-type impurities
  • the p-type impurity diffusion region 3 uses, for example, a gas containing p-type impurities. It can be formed by a method such as vapor phase diffusion.
  • the n-type impurity diffusion region 2 and the p-type impurity diffusion region 3 are each formed in a strip shape extending to the front side and / or the back side of the paper surface of FIG. 2, and the n-type impurity diffusion region 2 and the p-type impurity diffusion region 3 Are alternately arranged at predetermined intervals on the back surface of the substrate 1.
  • the n-type impurity diffusion region 2 is not particularly limited as long as it includes an n-type impurity and exhibits n-type conductivity.
  • an n-type impurity such as phosphorus can be used.
  • the p-type impurity diffusion region 3 is not particularly limited as long as it includes a p-type impurity and exhibits p-type conductivity.
  • a p-type impurity such as boron or aluminum can be used.
  • n-type impurity a gas containing an n-type impurity such as phosphorus such as POCl 3 can be used.
  • a gas containing a p-type impurity a p-type such as boron such as BBr 3 is used.
  • a gas containing impurities can be used.
  • a passivation film 4 is formed on the back surface of the substrate 1.
  • the passivation film 4 can be formed by a method such as a thermal oxidation method or a plasma CVD (Chemical Vapor Deposition) method.
  • the passivation film 4 for example, a silicon oxide film, a silicon nitride film, or a stacked body of a silicon oxide film and a silicon nitride film can be used, but is not limited thereto.
  • the thickness of the passivation film 4 can be, for example, 0.05 ⁇ m or more and 1 ⁇ m or less, and particularly preferably about 0.2 ⁇ m.
  • an uneven structure such as a texture structure is formed on the entire light-receiving surface of the substrate 1, and then an antireflection film 5 is formed on the uneven structure.
  • the texture structure can be formed, for example, by etching the light receiving surface of the substrate 1.
  • the substrate 1 is a silicon substrate
  • the substrate 1 is used by using an etching solution obtained by heating a solution obtained by adding isopropyl alcohol to an alkaline aqueous solution such as sodium hydroxide or potassium hydroxide to 70 ° C. or more and 80 ° C. or less. It can be formed by etching the light receiving surface.
  • the antireflection film 5 can be formed by, for example, a plasma CVD method.
  • a silicon nitride film or the like can be used, but is not limited thereto.
  • a part of the passivation film 4 on the back surface of the substrate 1 is removed to form a contact hole 4a and a contact hole 4b.
  • the contact hole 4a is formed so as to expose at least part of the surface of the n-type impurity diffusion region 2, and the contact hole 4b exposes at least part of the surface of the p-type impurity diffusion region 3. Formed.
  • the contact hole 4a and the contact hole 4b are formed after a resist pattern having openings at portions corresponding to the formation positions of the contact hole 4a and the contact hole 4b is formed on the passivation film 4 by using, for example, photolithography technology.
  • a back electrode type solar battery cell 8 To form the back electrode type solar battery cell 8.
  • n-type electrode 6 and the p-type electrode 7 for example, electrodes made of metal such as silver can be used.
  • the n-type electrode 6 and the p-type electrode 7 are each formed in a strip shape extending to the front side and / or the back side of the paper surface of FIG. 2, and the n-type electrode 6 and the p-type electrode 7 are respectively formed on the passivation film 4.
  • the n-type impurity diffusion region 2 and the p-type impurity diffusion region 3 are respectively in contact with the n-type impurity diffusion region 2 and the p-type impurity diffusion region 3 on the back surface of the substrate 1. ing.
  • FIG. 3 the typical enlarged plan view of the surface at the side of wiring installation of the wiring sheet 10 used by this Embodiment is shown.
  • the n-type wiring 12 and the p-type wiring 13 are alternately formed in a band shape with a predetermined interval.
  • a connection wiring 14 is formed on the surface of the insulating base 11 of the wiring sheet 10, and the n-type wiring 12 and the p-type wiring 13 are electrically connected by the connection wiring 14.
  • connection wiring 14 At both ends of the connection wiring 14, recesses 32, which are regions where the surface of the insulating base material 11 is exposed from the connection wiring 14, are formed.
  • the n-type wiring 12 and the p-type wiring 13 that are adjacent in the longitudinal direction of the n-type wiring 12 and the p-type wiring 13 are connected by the connection wiring 14. Electrically connected. Therefore, the back electrode type solar cells 8 installed adjacent to each other in the longitudinal direction on the wiring sheet 10 are electrically connected to each other.
  • the wiring sheet 10 can be manufactured as follows, for example. Hereinafter, an example of a method for manufacturing the wiring sheet 10 used in the present embodiment will be described with reference to the schematic cross-sectional views of FIGS. 4 (a) to 4 (d).
  • a conductive layer 41 made of a conductive member is formed on the surface of the insulating substrate 11.
  • a substrate made of a resin such as polyester, polyethylene naphthalate, or polyimide can be used, but is not limited thereto.
  • the thickness of the insulating substrate 11 can be, for example, 10 ⁇ m or more and 200 ⁇ m or less, and particularly preferably about 25 ⁇ m.
  • a layer made of metal such as copper can be used, but is not limited thereto.
  • a resist pattern 42 is formed on the conductive layer 41 on the surface of the insulating substrate 11.
  • the resist pattern 42 is formed in a shape having an opening at a location other than the location where the n-type wiring 12, the p-type wiring 13 and the connection wiring 14 are formed.
  • a resist constituting the resist pattern 42 for example, a conventionally known resist can be used, and it is applied by a method such as screen printing, dispenser application or ink jet application. Needless to say, a resist opening is provided at a location corresponding to the location where the recess 32 is formed.
  • the conductive layer 41 is patterned by removing the conductive layer 41 exposed from the resist pattern 42 in the direction of the arrow 43, and the remaining portion of the conductive layer 41.
  • the n-type wiring 12, the p-type wiring 13 and the connection wiring 14 are formed, and a portion from which the conductive layer 41 constituting a part of the connection wiring 14 is removed is defined as a recess 32.
  • the conductive layer 41 can be removed by, for example, wet etching using an acid or alkali solution.
  • the wiring sheet 10 is produced by removing all the resist patterns 42 from the surfaces of the n-type wiring 12, the p-type wiring 13 and the connection wiring 14.
  • the n-type electrode 6 and the p-type electrode 7 of the back electrode type solar cell 8 are respectively provided on the insulating base material 11 of the wiring sheet 10.
  • the back electrode type solar cells 8 and the wiring sheet 10 are aligned so as to face the wiring 12 and the p-type wiring 13 via the insulating resin 20 containing the conductive particles 21.
  • the electrode of the back electrode type solar cell 8 with respect to the wiring (the n-type wiring 12 and the p-type wiring 13) of the wiring sheet 10 due to the flow of the insulating resin 20 The relative positions of the n-type electrode 6 and the p-type electrode 7 can be adjusted more finely.
  • the back electrode solar cell 8 and the wiring sheet 10 are aligned so that the recess 32 of the wiring sheet 10 is positioned at a position facing the peripheral edge 31 of the back electrode solar cell 8. It is.
  • uncured fixing resin 22a is installed in the dent 32 of the wiring sheet 10 so that it may touch at least one area
  • the fixing resin 22 a can be installed so as to straddle a part of the peripheral portion 31 of the back electrode type solar cell 8 and the recess 32 of the wiring sheet 10. .
  • the cross section taken along Ic-Ic in FIG. 5 corresponds to the cross section shown in FIG.
  • the insulating resin 20 including the conductive particles 21 is installed in a region inside the peripheral edge portion 31 of the back electrode type solar battery cell 8, and the insulating resin 20 including the conductive particles 21 and the fixing resin 22a. Are preferably located apart from each other. Therefore, the dent 32 of the wiring sheet 10 includes the insulating resin 20 including the conductive particles 21 installed in the back electrode solar cell 8 by the alignment of the back electrode solar cell 8 and the wiring sheet 10 described above. It is preferable to be provided in a region of the wiring sheet 10 that is not opposed.
  • the fixing resin 22a flows into the inner region of the back electrode type solar cell 8 due to the step of the connection wiring 14 constituting the depression 32 of the wiring sheet 10. It becomes difficult to do. Therefore, the uncured insulating resin 20 including the conductive particles 21 disposed in the inner region of the back electrode type solar cell 8 contacts the uncured fixing resin 22 a disposed in the recess 32 of the wiring sheet 10. Without mixing, the mixing of the insulating resin 20 and the fixing resin 22a can be suppressed.
  • thermosetting and / or photosetting resin such as a conventionally known epoxy resin
  • the fixing resin 22a may contain an additive such as a conventionally known curing agent.
  • the step of installing the fixing resin 22a may be before the step of aligning the back electrode type solar cell 8 and the wiring sheet 10.
  • uncured fixing resin in at least one part of the peripheral part of the electrode installation side surface of the back electrode type solar cell 8 and at least one of the depressions 32 provided on the wiring installation side of the wiring sheet 10.
  • the step of installing 22a and aligning the back electrode solar cell 8 and the wiring sheet 10 for example, as shown in FIG. 5, at least a part of the peripheral portion 31 of the back electrode solar cell 8 and the wiring What is necessary is just to straddle the hollow 32 of the sheet
  • an uncured fixed resin 22 a installed in the recess 32 of the wiring sheet 10 so as to be in contact with at least a partial region of the peripheral edge portion 31 of the back electrode type solar cell 8.
  • the step of curing is performed. Thereby, the uncured fixing resin 22 a is cured to become the fixing resin 22, and the back electrode type solar cells 8 are temporarily fixed to the wiring sheet 10 by the cured fixing resin 22.
  • the fixed resin 22a is cured to be the fixed resin 22 by, for example, being subjected to at least one of ultraviolet irradiation and heating.
  • the process of sealing with a sealing material includes a process of curing the uncured insulating resin 20 including the conductive particles 21.
  • the step of sealing with the sealing material includes, for example, a surface protective material such as glass provided with the sealing material 18 such as ethylene vinyl acetate on the wiring sheet 10 on which the back electrode type solar cells 8 are temporarily fixed with the fixing resin 22. 17 and a back surface protective material 19 such as a polyester film provided with a sealing material 18 such as ethylene vinyl acetate, and heating between the surface protective material 17 and the back surface protective material 19 while applying pressure. be able to.
  • the conductive particles 21 are melted and agglomerated between the electrodes of the back electrode type solar cells 8 and the wiring of the wiring sheet 10 by the pressurization and heating described above, and then cooled and solidified to form the conductive material 21a. It becomes.
  • this conductive material 21a the electrode (n-type electrode 6 and p-type electrode 7) of the back electrode type solar cell 8 and the wiring sheet 10 (n-type wiring 12 and p-type wiring 13) are connected. An electrical connection can be obtained.
  • the insulating resin 20 is pushed out of the conductive particles 21 by the aggregation of the conductive particles 21 after melting, and the region between the electrodes of the back electrode type solar cell 8 and the wiring of the wiring sheet 10. After spreading to harden. At this time, even if the expanded insulating resin 20 comes into contact with the fixing resin 22, there is no problem because the insulating resin 20 is an insulating resin.
  • the n-type electrode 6 and the p-type electrode 7 of the back electrode type solar battery cell 8 are electrically connected to the n-type wiring 12 and the p-type wiring 13 of the wiring sheet 10 by the conductive material 21a, respectively.
  • a solar cell with a wiring sheet having a configuration in which the region between the electrodes of the back electrode type solar cell 8 and the region between the wirings of the wiring sheet 10 are mechanically connected by the cured insulating resin 20 is obtained.
  • the solar cell module by which the photovoltaic cell with a wiring sheet was sealed with the sealing material 18 between the surface protection material 17 and the back surface protection material 19 is obtained.
  • the uncured fixing resin 22a is installed in the recess 32 of the wiring sheet 10, and the fixing resin 22a is located in the inner region of the back electrode type solar cell 8.
  • the fixed resin 22a is cured to be the fixed resin 22 in a state where it does not go around. Therefore, it can suppress that uncured fixing resin 22a mixes with the insulating resin 20 containing the electroconductive particle 21 installed in the area
  • the stability of the mechanical connection between the cell 8 and the wiring sheet 10 can be improved, and the back surface is formed by the conductive material 21a formed by cooling and solidifying after the conductive particles 21 are melted and aggregated.
  • the stability of the electrical connection between the electrode of the electrode type solar cell 8 and the wiring of the wiring sheet 10 can be improved.
  • a wiring sheet 10 wirings (n-type wiring 12 and p-type wiring 13) may be provided with an insulating resin 20 containing conductive particles 21, and the electrodes of the back electrode solar cell 8 and the wiring of the wiring sheet 10 You may install the insulating resin 20 containing the electroconductive particle 21 in each.
  • the step of curing the insulating resin 20 including the conductive particles 21 was performed in the step of sealing with the sealing material 18, but the conductive particles 21 were removed before the step of sealing with the sealing material 18. Even if a solar cell with a wiring sheet having the above-described configuration is produced by performing a curing step of the insulating resin 20 including the solar cell module, the solar cell with the wiring sheet is sealed with a sealing material 18 to produce a solar cell module. Good. However, from the viewpoint of improving the manufacturing efficiency of the solar cell module, it is preferable to perform a curing step of the insulating resin 20 including the conductive particles 21 in the step of sealing with the sealing material 18.
  • the depression 32 is formed by removing the conductive layer 41, but the method of forming the depression 32 is not particularly limited. However, as described above, by removing the conductive layer 41, it is preferable to form the depression 32 together with the n-type wiring 12, the p-type wiring 13, and the connection wiring 14 from the viewpoint that an additional step is unnecessary. .
  • Examples of the method for forming the recess 32 other than the removal of the conductive layer 41 include a method of reducing the thickness of the insulating base material 11, a method of deforming the insulating base material 11, or a method combining these methods. Can be mentioned.
  • the shape and size of the recess 32 are not particularly limited, and the surface of the insulating substrate 11 does not necessarily have to be exposed in the recess 32. However, in order to increase the level difference of the depression 32 depending on the thickness of the connection wiring 14 and effectively suppress the inflow of the fixing resin 22a into the inner region of the back electrode type solar cell 8, the depression 32 It is preferable that at least a part of the surface of the insulating substrate 11 is exposed.
  • the recess 32 has a shape extending from a region facing the peripheral edge 31 of the back electrode type solar cell 8 so as to enter a region facing the inside of the back electrode type solar cell 8.
  • the fixing resin 22 a can be installed between the back surface of the back electrode type solar cell 8 and the recess 32, the mechanical relationship between the back electrode type solar cell 8 and the wiring sheet 10 is achieved. It is possible to further improve the stability of connection.
  • the region of the depression 32 is formed at a position not facing the electrode formation region of the back electrode type solar cell 8, and the insulating base material 11 of the wiring sheet 10 has a thickness of 200 ⁇ m or less.
  • the electrode of the back electrode type solar battery cell 8 and the recess 32 of the wiring sheet 10 are formed in a shape separated by 1 mm or more. In this way, by connecting the electrode of the back surface electrode type solar battery cell 8 and the recess 32 of the wiring sheet 10 by an appropriate distance, the connection wiring 14 around the recess 32 is connected to the back electrode type solar cell 8. Since the space between the recess 32 and the electrode can be blocked by abutting against the region where the electrode on the back surface is not formed, the fixing resin 22a is more reliably prevented from being mixed with the insulating resin 20. be able to.
  • the concept of the back electrode type solar battery cell in the present invention only has a configuration in which both the n-type electrode and the p-type electrode are formed only on one surface side (back side) of the substrate described above.
  • so-called back contact type solar cells opposite to the light receiving surface side of the solar cells
  • MWT Metal Wrap Through
  • solar cells having a configuration in which a part of an electrode is arranged in a through hole provided in a substrate
  • All of the solar cells having a structure in which current is taken out from the back side of the side.
  • the concept of the solar cell with a wiring sheet in the present invention includes not only a configuration in which a plurality of back electrode type solar cells are installed on the wiring sheet, but also a single back electrode type solar cell on the wiring sheet.
  • the configuration installed in is also included.
  • FIGS. 6A to 6E are schematic cross-sectional views illustrating a method for manufacturing the solar cell module according to the second embodiment.
  • the present embodiment is characterized in that a back electrode type solar cell 8 having a protrusion 33 as an example of a resin flow blocking portion on the surface of the substrate 1 on the electrode forming side is used.
  • a back electrode type solar cell 8 and a wiring sheet 10 are prepared and provided on the back surface of the substrate 1 which is at least one surface of the back electrode type solar cell 8.
  • Insulating resin 20 containing conductive particles 21 is placed on n-type electrode 6 and p-type electrode 7. Note that the insulating resin 20 including the conductive particles 21 is not installed on the protrusion 33.
  • FIG. 7 shows a schematic plan view of the back surface of the back electrode type solar battery cell 8 used in the second embodiment.
  • the protrusion 33 is provided in a region between the formation region of the back electrode (the n-type electrode 6 and the p-type electrode 7) of the back electrode type solar cell 8 and the peripheral portion 31. It has been.
  • the back electrode type solar cell 8 in which the protrusion 33 is provided in a part of the region between the electrode forming region on the back surface of the back electrode type solar cell 8 and the peripheral portion 31 is provided.
  • the projection part 33 should just be provided in the at least one part of the area
  • the protrusion 33 protrudes outward from the back surface of the back electrode type solar cell 8.
  • the material of the protrusion 33 is not particularly limited, but the protrusion 33 is preferably formed of the same material as the electrode of the back electrode type solar cell 8. In this case, since the electrode on the back surface of the back electrode type solar cell 8 and the protrusion 33 can be formed at the same time, the manufacturing efficiency of the back electrode type solar cell 8 can be improved.
  • the back electrode type solar cell 8 having the protrusion 33 can be formed by the same method as that described in Embodiment 1 except that the protrusion 33 is formed.
  • the protrusion 33 is made of the same material as the electrode of the back electrode type solar cell 8, the protrusion 33 and the electrode (n-type electrode 6 and p-type electrode 7) are separated from each other. It is preferable to be formed.
  • the insulating resin 20 including the conductive particles 21 installed between the electrode of the back electrode type solar cell 8 and the wiring of the wiring sheet 10 exceeds the protrusion 33 and the back electrode type solar cell. 8 can be prevented from flowing out toward the peripheral edge 31 side.
  • a liquid-repellent coating may be provided on the back surface of the back electrode type solar battery cell 8 instead of the protruding portion 33.
  • the uncured insulating resin 20 containing the conductive particles 21 and the uncured fixing resin 22a are repelled together by the liquid-repellent coating, whereby the back surface of the back electrode type solar cell 8 is formed.
  • a portion where these resins cannot flow into can be formed. Therefore, also in this case, it is possible to more reliably prevent the insulating resin 20 including the conductive particles 21 and the fixing resin 22a from being mixed.
  • the liquid repellent coating can be used without particular limitation as long as it can repel the uncured insulating resin 20 and the uncured fixing resin 22a.
  • a protrusion 33 may be provided, and a liquid repellent coating may be provided in a region between the protrusion 33 on the back surface of the back electrode type solar cell 8 and the electrode.
  • the protrusion 33 can suppress the inflow of the fixed resin 22a into the back electrode solar cell 8 and the insulating resin 20 including the conductive particles 21 by the liquid repellent coating.
  • the outflow to the peripheral edge 31 side of the back electrode type solar cell 8 can be suppressed. Therefore, in this case, the synergistic effect of these effects can further reliably prevent the insulating resin 20 including the conductive particles 21 and the fixing resin 22a from being mixed.
  • a wiring sheet 10 similar to the wiring sheet 10 used in the first embodiment can be used except that the recess 32 is not formed.
  • the wiring sheet 10 used in the second embodiment the wiring sheet 10 having the recess 32 used in the first embodiment can also be used.
  • the resin flow blocking portion is preferably provided at a position facing the connection wiring 14 around the recess 32.
  • the n-type electrode 6 and the p-type electrode 7 of the back electrode type solar cell 8 are respectively provided on the insulating substrate 11 of the wiring sheet 10.
  • the back electrode type solar cells 8 and the wiring sheet 10 are aligned so as to face the wiring 12 and the p-type wiring 13 via the insulating resin 20 containing the conductive particles 21.
  • an uncured fixing resin 22 a is placed between at least a part of the peripheral edge portion 31 of the back electrode type solar cell 8 and the wiring sheet 10.
  • the fixing resin 22 a can be installed in a region outside the protruding portion 33 of the back electrode type solar cell 8.
  • a cross section taken along VIc-VIc in FIG. 8 corresponds to the cross section shown in FIG.
  • the insulating resin 20 including the conductive particles 21 is disposed in a region inside the protrusion 33 of the back electrode type solar cell 8, the insulating resin 20 including the conductive particles 21 and the fixing resin 22a is located away from each other.
  • the fixing resin 22a By installing the uncured fixing resin 22a as described above, the fixing resin 22a is placed in the inner region of the back electrode solar cell 8 due to the step formed by the protrusion 33 of the back electrode solar cell 8. It becomes difficult to flow in. Therefore, the uncured insulating resin 20 including the conductive particles 21 installed in the inner region of the back electrode solar cell 8 is installed outside the protrusion 33 of the back electrode solar cell 8. Mixing between the insulating resin 20 and the fixed resin 22a can be suppressed without contacting the uncured fixed resin 22a.
  • Step of curing the fixing resin a step of curing the uncured fixing resin 22 a installed outside the protrusion 33 of the back electrode type solar cell 8 is performed. Thereby, the uncured fixing resin 22 a is cured to become the fixing resin 22, and the back electrode type solar cell 8 is temporarily fixed to the wiring sheet 10 by the cured fixing resin 22.
  • the process of sealing with a sealing material includes a process of curing the uncured insulating resin 20 including the conductive particles 21.
  • the step of sealing with the sealing material includes, for example, the surface protective material 17 provided with the sealing material 18 on the wiring sheet 10 on which the back electrode type solar cells 8 are temporarily fixed with the fixing resin 22. And the back surface protective material 19 provided with the sealing material 18, and heating is performed while applying pressure between the front surface protective material 17 and the back surface protective material 19.
  • the conductive particles 21 are melted and agglomerated between the electrodes of the back electrode type solar cells 8 and the wiring of the wiring sheet 10 by the pressurization and heating described above, and then cooled and solidified to form the conductive material 21a. It becomes.
  • this conductive material 21a the electrode (n-type electrode 6 and p-type electrode 7) of the back electrode type solar cell 8 and the wiring sheet 10 (n-type wiring 12 and p-type wiring 13) are connected. An electrical connection can be obtained.
  • the insulating resin 20 is pushed out of the conductive particles 21 by the aggregation of the conductive particles 21 after melting, and the region between the electrodes of the back electrode type solar cell 8 and the wiring of the wiring sheet 10. After spreading to harden. At this time, even if the expanded insulating resin 20 comes into contact with the fixing resin 22, there is no problem because the insulating resin 20 is an insulating resin.
  • the n-type electrode 6 and the p-type electrode 7 of the back electrode type solar battery cell 8 are electrically connected to the n-type wiring 12 and the p-type wiring 13 of the wiring sheet 10 by the conductive material 21a, respectively.
  • a solar cell with a wiring sheet having a configuration in which the region between the electrodes of the back electrode type solar cell 8 and the region between the wirings of the wiring sheet 10 are mechanically connected by the cured insulating resin 20 is obtained.
  • the solar cell module by which the photovoltaic cell with a wiring sheet was sealed with the sealing material 18 between the surface protection material 17 and the back surface protection material 19 is obtained.
  • the uncured fixed resin 22a is installed outside the protrusion 33 of the back electrode type solar cell 8, and the fixed resin 22a is the back electrode type solar cell.
  • the fixed resin 22 a is cured to be the fixed resin 22 so as not to go around the area inside the battery cell 8. Therefore, it can suppress that uncured fixing resin 22a mixes with the insulating resin 20 containing the electroconductive particle 21 installed in the area
  • the stability of the mechanical connection between the cell 8 and the wiring sheet 10 can be improved, and the back electrode type solar cell is formed by the conductive material 21a that is cooled and solidified after the conductive particles 21 are melted and aggregated.
  • the stability of electrical connection between the eight electrodes and the wiring of the wiring sheet 10 can be improved.
  • the present invention can be suitably used for a wiring sheet, a solar battery cell with a wiring sheet, a solar battery module, a solar battery cell, a method for manufacturing a solar battery cell with a wiring sheet, and a method for manufacturing a solar battery module.
  • Electrode solar cell 10 wiring sheet, 11 insulating substrate, 12 n-type wiring, 13 p-type wiring, 14 connecting wiring, 20 insulating resin, 21 conductive particles, 21a conductive material, 22a, 22 fixed resin, 31 peripheral edge, 32 dent, 33 protrusion, 41 conductive layer, 42 resist, 43 arrow.

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

Abstract

L'invention concerne : une feuille de câblage (10) présentant un retrait (32) sur au moins une partie de sa région opposée à une section bord périphérique d'une cellule solaire (8); et une cellule solaire sur laquelle est agencée une section d'inhibition d'écoulement de résine (33) sur au moins une partie de sa région située entre des électrodes (6, 7) et la partie bord périphérique. L'invention concerne également une cellule solaire avec feuille de câblage, un module de cellules solaires, et les procédés de fabrication de la cellule solaire avec feuille de câblage ainsi que du module de cellules solaires. La cellule solaire avec feuille de câblage et le module de cellules solaires mettent en œuvre ladite feuille de câblage et/ou ladite cellule solaire.
PCT/JP2011/072033 2010-10-21 2011-09-27 Feuille de câblage, cellule solaire avec feuille de câblage, module de cellules solaires, cellule solaire, et procédés de fabrication de cellule solaire avec feuille de câblage ainsi que de module de cellules solaires WO2012053329A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010236333A JP5159860B2 (ja) 2010-10-21 2010-10-21 配線シート付き太陽電池セル、太陽電池モジュール、配線シート付き太陽電池セルの製造方法および太陽電池モジュールの製造方法
JP2010-236333 2010-10-21

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WO2012053329A1 true WO2012053329A1 (fr) 2012-04-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008090718A1 (fr) * 2007-01-25 2008-07-31 Sharp Kabushiki Kaisha Cellule de batterie solaire, réseau de batteries solaires, module de batterie solaire et procédé de fabrication d'un réseau de batteries solaires
JP2009088145A (ja) * 2007-09-28 2009-04-23 Sharp Corp 太陽電池、太陽電池の製造方法、太陽電池モジュールの製造方法および太陽電池モジュール
JP2010050341A (ja) * 2008-08-22 2010-03-04 Sharp Corp 太陽電池モジュールおよびその製造方法
JP2010092981A (ja) * 2008-10-06 2010-04-22 Sharp Corp 太陽電池、裏面電極型太陽電池、配線基板および太陽電池の製造方法
WO2010110036A1 (fr) * 2009-03-23 2010-09-30 シャープ株式会社 Cellule solaire équipée d'une feuille de circuit imprimé, procédé de fabrication de module de pile solaire et de cellule solaire équipée d'une feuille de circuit imprimé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008090718A1 (fr) * 2007-01-25 2008-07-31 Sharp Kabushiki Kaisha Cellule de batterie solaire, réseau de batteries solaires, module de batterie solaire et procédé de fabrication d'un réseau de batteries solaires
JP2009088145A (ja) * 2007-09-28 2009-04-23 Sharp Corp 太陽電池、太陽電池の製造方法、太陽電池モジュールの製造方法および太陽電池モジュール
JP2010050341A (ja) * 2008-08-22 2010-03-04 Sharp Corp 太陽電池モジュールおよびその製造方法
JP2010092981A (ja) * 2008-10-06 2010-04-22 Sharp Corp 太陽電池、裏面電極型太陽電池、配線基板および太陽電池の製造方法
WO2010110036A1 (fr) * 2009-03-23 2010-09-30 シャープ株式会社 Cellule solaire équipée d'une feuille de circuit imprimé, procédé de fabrication de module de pile solaire et de cellule solaire équipée d'une feuille de circuit imprimé

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