WO2016143250A1 - Procédé de fabrication de module de batterie solaire - Google Patents

Procédé de fabrication de module de batterie solaire Download PDF

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Publication number
WO2016143250A1
WO2016143250A1 PCT/JP2016/000540 JP2016000540W WO2016143250A1 WO 2016143250 A1 WO2016143250 A1 WO 2016143250A1 JP 2016000540 W JP2016000540 W JP 2016000540W WO 2016143250 A1 WO2016143250 A1 WO 2016143250A1
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WO
WIPO (PCT)
Prior art keywords
light reflecting
reflecting member
solar
solar cell
solar battery
Prior art date
Application number
PCT/JP2016/000540
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English (en)
Japanese (ja)
Inventor
治寿 橋本
神野　浩
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2017504590A priority Critical patent/JP6467727B2/ja
Publication of WO2016143250A1 publication Critical patent/WO2016143250A1/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
    • 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
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • 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
    • Y02E10/52—PV systems with concentrators

Definitions

  • the present invention relates to a method for manufacturing a solar cell module.
  • solar cell modules are being developed as photoelectric conversion devices that convert light energy into electrical energy.
  • the solar cell module is expected as a new energy source because it can convert inexhaustible sunlight directly into electricity, and it has a smaller environmental load and is cleaner than power generation using fossil fuels.
  • the solar cell module has, for example, a structure in which a plurality of solar cells are sealed with a filling member between a surface protection member and a back surface protection member.
  • the plurality of solar cells are arranged in a matrix.
  • the plurality of solar cells arranged in a straight line along one of the row direction and the column direction form a string by connecting two adjacent solar cells by tab wiring.
  • An object of the present invention is to provide a method for manufacturing a solar cell module capable of effectively improving power generation efficiency because deformation of a light reflecting member can be suppressed.
  • one aspect of a method for manufacturing a solar cell module according to the present invention is to form a string by forming a string by connecting a plurality of solar cells by tab wiring by heating at a first temperature.
  • a light reflecting member is provided at an end of at least one of the plurality of solar cells by heating at a second temperature lower than the first temperature.
  • a light reflecting member attaching step for attaching is to form a string by forming a string by connecting a plurality of solar cells by tab wiring by heating at a first temperature.
  • the deformation of the light reflecting member can be suppressed, the power generation efficiency can be improved effectively.
  • FIG. 1 is a plan view of a solar cell module according to an embodiment.
  • 2A is a cross-sectional view of the solar cell module according to the embodiment taken along the line IIA-IIA in FIG. 2B is a cross-sectional view of the solar cell module according to the embodiment taken along the line IIB-IIB in FIG.
  • FIG. 3 is an enlarged view of a region X surrounded by a broken line in FIG. 1, and is a partially enlarged plan view of the solar cell module according to the embodiment.
  • 4A is an enlarged cross-sectional view of the solar cell module according to the embodiment taken along the line IVA-IVA of FIG. 4B is an enlarged cross-sectional view of the solar cell module according to the embodiment taken along the line IVB-IVB in FIG.
  • FIG. 5A is an enlarged cross-sectional view of the solar cell module according to the embodiment taken along line VA-VA in FIG. 5B is an enlarged cross-sectional view of the solar cell module according to the embodiment taken along the line VB-VB in FIG.
  • FIG. 6 is a diagram for explaining a method of manufacturing the solar cell module according to the embodiment.
  • FIG. 7: is a top view for demonstrating the photovoltaic cell preparation process, the string formation process, and the light reflection member process in the manufacturing method of the solar cell module which concerns on embodiment.
  • FIG. 8 is a plan view for explaining an example of a method for manufacturing a solar cell module.
  • FIG. 1 is a plan view of a solar cell module 1 according to an embodiment.
  • 2A and 2B are cross-sectional views of the solar cell module 1 according to the embodiment taken along lines IIA-IIA and IIB-IIB in FIG. 1, respectively.
  • the Z axis is an axis perpendicular to the main surface of the solar cell module 1
  • the X axis and the Y axis are orthogonal to each other, and both are orthogonal to the Z axis. Is the axis. The same applies to the Z-axis, X-axis, and Y-axis in the following drawings.
  • the solar cell module 1 includes a plurality of solar cells 10, a tab wiring 20, a light reflecting member 30, a surface protection member 40, a back surface protection member 50, A filling member 60 and a frame 70 are provided.
  • the solar cell module 1 has a structure in which a plurality of solar cells 10 are sealed with a filling member 60 between a surface protection member 40 and a back surface protection member 50.
  • the planar view shape of the solar cell module 1 is, for example, a substantially rectangular shape.
  • the solar cell module 1 has a substantially rectangular shape with a horizontal length of about 1600 mm and a vertical length of about 800 mm.
  • the shape of the solar cell module 1 is not limited to a rectangular shape.
  • FIG. 3 is an enlarged view of a region X surrounded by a broken line in FIG. 1, and is a partially enlarged plan view of the solar cell module 1 according to the embodiment.
  • 4A, FIG. 4B, FIG. 5A and FIG. 5B are enlarged sectional views of the solar cell module 1 according to the embodiment taken along the lines IVA-IVA, IVB-IVB, VA-VA, and VB-VB in FIG. 3, respectively.
  • It is. 4A and 5A show the peripheral structure of the tab wiring 20, and FIGS. 4B and 5B show the peripheral structure of the light reflecting member 30.
  • the solar cell 10 is a photoelectric conversion element (photovoltaic element) that converts light such as sunlight into electric power. As shown in FIG. 1, a plurality of solar cells 10 are arranged in a matrix (matrix shape) on the same plane to constitute a cell array.
  • the plurality of solar cells 10 arranged in a straight line along one of the row direction and the column direction are formed by connecting two adjacent solar cells 10 by tab wirings 20 to form a string (cell string). Yes.
  • the plurality of solar cells 10 are stringed by being electrically connected by the tab wiring 20.
  • the plurality of solar cells 10 in one string 10 ⁇ / b> S are connected in series by tab wiring 20.
  • each string 10S is configured by sequentially connecting two solar cells 10 adjacent to each other in the row direction (X-axis direction) with three tab wirings 20 in the row direction. All the photovoltaic cells 10 for one row arranged along are connected.
  • a plurality of strings 10S are formed.
  • the plurality of strings 10S (strings) are arranged along the other in the row direction or the column direction.
  • six strings 10S are formed. As shown in FIG. 1, the six strings 10S are arranged at equal intervals along the column direction (Y-axis direction) so as to be parallel to each other.
  • each string 10S is connected to a crossover wiring (not shown) via a tab wiring 20.
  • the last solar cell 10 in each string 10 ⁇ / b> S is connected to a crossover wiring (not shown) via a tab wiring 20.
  • a plurality of (six in FIG. 1) strings 10S are connected in series or in parallel to form a cell array.
  • two adjacent strings 10S are connected in series to form one series connection body (24 solar cells 10 connected in series), and three series connection bodies are provided. Connected in parallel.
  • the plurality of solar cells 10 are arranged with gaps between the solar cells 10 adjacent in the row direction and the column direction. As will be described later, a light reflecting member 30 is disposed in the gap.
  • the solar battery cell 10 has a substantially rectangular shape in plan view. Specifically, the solar battery cell 10 has a shape lacking a 125 mm square square. That is, one string 10 ⁇ / b> S is configured such that one side of two adjacent solar battery cells 10 faces each other. In addition, the shape of the photovoltaic cell 10 is not restricted to a substantially rectangular shape.
  • the solar cell 10 has a semiconductor pin junction as a basic structure.
  • an n-type single crystal silicon substrate which is an n-type semiconductor substrate and one main surface side (front surface side) of the n-type single crystal silicon substrate.
  • the i-type amorphous silicon layer, the n-type amorphous silicon layer, the n-side surface electrode, and the other main surface side (back side) of the n-type single crystal silicon substrate, which are sequentially formed, are sequentially formed.
  • the n-side surface electrode and the p-side surface electrode are transparent electrodes such as ITO (Indium Tin Oxide).
  • the solar battery cell 10 includes a front-side collector electrode 11 (n-side collector electrode) electrically connected to the n-side surface electrode of the solar battery cell 10, and the solar battery cell 10.
  • a back side collector electrode 12 (p side collector electrode) electrically connected to the p side surface electrode is formed.
  • the front side collector electrode 11 is formed so as to be in contact with, for example, the n-side surface electrode
  • the back side collector electrode 12 is formed so as to be in contact with, for example, the p-side surface electrode.
  • Each of the front-side collector electrode 11 and the back-side collector electrode 12 includes, for example, a plurality of finger electrodes that are linearly formed so as to be orthogonal to the extending direction of the tab wiring 20, and finger fingers that are connected to these finger electrodes.
  • a plurality of bus bar electrodes formed in a straight line along a direction perpendicular to the electrodes (extending direction of the tab wiring 20).
  • the number of bus bar electrodes is the same as that of the tab wiring 20, and is three in the present embodiment.
  • the front side collector electrode 11 and the back side collector electrode 12 are mutually the same shape, it is not limited to this.
  • the front side collector electrode 11 and the back side collector electrode 12 are made of a low resistance conductive material such as silver (Ag).
  • the front-side collector electrode 11 and the back-side collector electrode 12 are screen-printed in a predetermined pattern on the n-side surface electrode and the p-side surface electrode with a conductive paste in which a conductive filler such as silver is dispersed in a binder resin. Can be formed.
  • both the front surface (n side surface) and the back surface (p side surface) are light receiving surfaces.
  • both the front surface protection member 40 and the back surface protection member 50 light-transmitting members, light can be incident from both the front surface protection member 40 side and the back surface protection member 50 side.
  • the carriers generated in the photoelectric conversion part of the solar battery cell 10 by the light irradiation are diffused as a photocurrent to the n-side surface electrode and the p-side surface electrode, and are collected by the front-side collector electrode 11 and the back-side collector electrode 12 to be tab wiring 20 flows.
  • the front side collector electrode 11 and the back side collector electrode 12 the carrier generated in the solar battery cell 10 can be efficiently taken out to the external circuit.
  • the tab wiring 20 electrically connects two adjacent solar cells 10 in the string 10S.
  • two adjacent solar cells 10 are connected by three tab wires 20 that are arranged substantially in parallel with each other.
  • Each tab wiring 20 is extended along the alignment direction of the two photovoltaic cells 10 to be connected.
  • the tab wiring 20 is a long conductive wiring, for example, a ribbon-shaped metal foil.
  • the tab wiring 20 can be produced, for example, by cutting a metal foil such as a copper foil or a silver foil, which is covered with solder, silver, or the like into a strip having a predetermined length.
  • one end of the tab wiring 20 is disposed on the surface of one of the two adjacent solar battery cells 10.
  • the end portion is disposed on the back surface of the other solar battery cell 10 of the two adjacent solar battery cells 10.
  • Each tab wiring 20 includes two adjacent solar cells 10, an n-side collector electrode (front-side collector electrode) of one solar cell 10 and a p-side collector electrode (rear surface side) of the other solar cell 10. Are electrically connected to each other. Specifically, the tab wiring 20 is joined to the bus bar electrode of the front side collector electrode 11 of one solar cell 10 and the bus bar electrode of the back side collector electrode 12 of the other solar cell 10. The tab wiring 20 and the front side collector electrode 11 (back side collector electrode 12) are bonded together by, for example, thermocompression bonding with the conductive adhesive 21 interposed therebetween.
  • a conductive adhesive paste SCP
  • a conductive adhesive film SCF
  • an anisotropic conductive film ACF
  • the conductive adhesive paste is, for example, a paste adhesive in which conductive particles are dispersed in a thermosetting adhesive resin material such as an epoxy resin, an acrylic resin, or a urethane resin.
  • the conductive adhesive film and the anisotropic conductive film are formed in a film form by dispersing conductive particles in a thermosetting adhesive resin material.
  • the tab wiring 20 and the front side collecting electrode 11 may be joined by a solder material instead of the conductive adhesive 21. Moreover, it may replace with the conductive adhesive 21 and may use the resin adhesive which does not contain electroconductive particle. In this case, by appropriately designing the application thickness of the resin adhesive, the resin adhesive softens during pressurization during thermocompression bonding, and the surface of the front-side collector electrode 11 and the tab wiring 20 are brought into direct contact with each other electrically. Can be connected.
  • the tab wiring 20 in the present embodiment is provided with irregularities 20a on the surface thereof as shown in FIG. 5A.
  • the unevenness 20 a scatters the light, or the interface between the surface protection member 40 and the air layer or the surface protection member 40 and the filling member 60. It is possible to guide to the solar battery cell 10 by reflecting at the interface. Thereby, the light reflected by the surface of the tab wiring 20 can also contribute to power generation effectively, and the power generation efficiency of the solar cell module 1 is improved.
  • a tab wiring 20 it is possible to use a surface of a copper foil having a concavo-convex 20a as a surface shape and a silver vapor deposition film formed thereon.
  • the surface of the tab wiring 20 may be a flat surface instead of the uneven shape.
  • a light reflecting member having an uneven surface may be separately laminated on the tab wiring having a flat surface.
  • the solar battery cell 10 is provided with a light reflecting member 30.
  • the light reflecting member 30 is provided in each of the plurality of solar cells 10.
  • the light reflecting member 30 is disposed so as to be positioned in a gap between two adjacent solar cells 10.
  • the light reflection member 30 is provided in each of these two photovoltaic cells 10 so that it may protrude in the clearance gap between the two adjacent photovoltaic cells 10.
  • each light reflecting member 30 is provided at an end portion of the solar battery cell 10 so that a part of the light reflecting member 30 protrudes into a gap between two adjacent strings 10S.
  • the light reflecting member 30 provided in the solar cell 10 in one string 10S and the light reflecting member 30 provided in the solar cell 10 in the other string 10S face each other. Yes. That is, the light reflecting member 30 provided in the solar battery cell 10 in one string 10S and the light reflecting member 30 provided in the solar battery cell 10 in the other string 10S project from one to the other. .
  • two light reflecting members 30 are provided in one solar battery cell 10 except for the solar battery cell 10 of the outermost peripheral string 10S.
  • the light reflecting member 30 has a tape shape extending in the longitudinal direction of the string 10S, and has a long rectangular shape as an example.
  • the light reflecting member 30 is affixed along one side of the solar cell 10 so that one end in the width direction (short direction) and the end of the solar cell 10 overlap each other.
  • the light reflecting member 30 may be attached to the power generation invalid region of the solar battery cell 10.
  • the two light reflecting members 30 provided and opposed to each of the two adjacent solar cells 10 cover the gap between the two adjacent strings 10 ⁇ / b> S. That is, the gap between the two adjacent strings 10 ⁇ / b> S is covered with the two light reflecting members 30 facing each other.
  • the two opposing light reflecting members 30 are arranged so that the end side surfaces thereof are in contact with each other so as to cover the gap without overlapping each other.
  • Part of the two light reflecting members 30 may overlap each other. That is, the end portions of the protruding portions of the two opposing light reflecting members 30 may overlap in the Z-axis direction.
  • a gap may exist between the two light reflecting members 30 facing each other, and the gap between the two adjacent strings 10S may not be completely covered.
  • the two light reflecting members 30 provided in each of the two adjacent solar cells 10 have the same shape. Moreover, in this Embodiment, all the light reflection members 30 in the solar cell module 1 are the same shapes.
  • the light reflecting member 30 includes a resin base material 31 and a reflective film 32 formed on the surface of the resin base material 31.
  • the resin substrate 31 is made of, for example, polyethylene terephthalate (PET) or acrylic.
  • the reflective film 32 is a metal film made of a metal such as aluminum or silver, and is an aluminum vapor deposition film in the present embodiment.
  • unevenness 31a is formed on the surface of the resin base material 31, and the reflective film 32 is formed on the surface of the unevenness 31a of the resin base material 31 by vapor deposition.
  • the resin base material 31 and the reflective film 32 are laminated, and the light reflecting member 30 having an uneven shape on the surface is configured.
  • the unevenness 31 a scatters the light, or the interface between the surface protective member 40 and the air layer or the surface protective member 40 and the filling member 60. It is possible to guide to the solar battery cell 10 by reflecting at the interface.
  • the light reflecting member 30 has a long rectangular shape, for example, a length of 100 mm to 130 mm, a width of 1 mm to 20 mm, and a thickness of 0.05 mm to 0.5 mm.
  • the light reflecting member 30 has a length of 125 mm, a width of 5 mm, and a thickness of 0.1 mm.
  • the thickness of the resin base material 31 is, for example, 50 ⁇ m to 500 ⁇ m.
  • the height between a recessed part and a convex part is 20 micrometers or more and 100 micrometers or less, for example, and the space
  • the height between a recessed part and a convex part is 12 micrometers, and the space
  • the shape of the irregularities 31a is a triangular groove shape along the longitudinal direction of the light reflecting member 30, but is not limited thereto, and may be capable of scattering light.
  • a conical shape, a quadrangular pyramid shape, a polygonal pyramid shape, or a combination of these shapes may be used.
  • the light reflecting member 30 is provided in the solar battery cell 10 by attaching the back surface of the resin base material 31 and the solar battery cell 10 with the resin adhesive 33.
  • the resin adhesive 33 is, for example, EVA, and may be provided in advance on the back surface of the resin base material 31. That is, the light reflecting member 30 may be configured by the resin base material 31, the reflective film 32, and the resin adhesive 33.
  • the surface protection member 40 (first protection member) is a member that protects the surface on the front side of the solar cell module 1, and the inside of the solar cell module 1 (solar cell 10 or the like) is exposed to an external environment such as wind and rain or an external impact. Protect from. As shown in FIGS. 2A and 2B, the surface protection member 40 is disposed on the surface side (n side) of the solar battery cell 10 and protects the light receiving surface on the front side of the solar battery cell 10.
  • the surface protection member 40 is provided on the light receiving surface side of the solar battery cell 10, the surface protection member 40 is configured by a translucent member that transmits light in a wavelength band used for photoelectric conversion in the solar battery cell 10.
  • the surface protection member 40 is, for example, a glass substrate (transparent glass substrate) made of a transparent glass material, or a resin substrate made of a hard resin material having a film-like or plate-like translucency and water shielding property.
  • the back surface protection member 50 (second protection member) is a member that protects the back surface of the solar cell module 1, and protects the inside of the solar cell module 1 from the external environment. As shown in FIGS. 2A and 2B, the back surface protection member 50 is disposed on the back surface side (p side) of the solar battery cell 10.
  • the back surface of the solar battery cell 10 is also a light receiving surface. Therefore, the back surface protection member 50 protects the light receiving surface on the back side of the solar battery cell 10 and is made of a translucent member.
  • the back surface protection member 50 is a film-like or plate-like resin sheet made of a resin material such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN).
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • a glass sheet or a glass substrate made of a glass material may be used as the back surface protection member 50.
  • the back surface protection member 50 may be an opaque plate or film.
  • an opaque member such as a black member or a laminated film such as a resin film having a metal foil such as an aluminum foil therein may be used.
  • a filling member 60 is filled between the front surface protection member 40 and the back surface protection member 50.
  • the front surface protection member 40 and the back surface protection member 50 and the solar battery cell 10 are bonded and fixed by the filling member 60.
  • the filling member (filler) 60 is disposed between the front surface protection member 40 and the back surface protection member 50. In the present embodiment, the filling member 60 is filled so as to fill a space between the surface protection member 40 and the back surface protection member 50.
  • the filling member 60 is made of a translucent resin material such as ethylene vinyl acetate (EVA).
  • EVA ethylene vinyl acetate
  • the filling member 60 is formed by sandwiching a plurality of solar cells 10 between the front surface side filling member and the back surface side filling member.
  • the filling member 60 is formed by laminating (laminating) two resin sheets (EVA sheets) sandwiching the six strings 10S.
  • the frame 70 is an outer frame that covers the peripheral edge of the solar cell module 1.
  • Frame 70 in the present embodiment is an aluminum frame (aluminum frame) made of aluminum. As shown in FIG. 1, four frames 70 are used, and are attached to each of the four sides of the solar cell module 1.
  • the frame 70 is fixed to each side of the solar cell module 1 with an adhesive, for example.
  • the solar cell module 1 is provided with a terminal box for taking out the electric power generated by the solar cells 10.
  • the terminal box is fixed to the back surface protection member 50, for example.
  • the terminal box contains a plurality of circuit components mounted on the circuit board.
  • FIG. 6 is a diagram for explaining a method of manufacturing the solar cell module 1 according to the embodiment
  • FIG. 7 shows details of the solar cell preparation step, the string forming work, and the light reflecting member step in the manufacturing method. It is a top view for demonstrating.
  • FIGS. 7A to 7C are partial enlarged views of the steps of FIGS. 6A to 6C.
  • the photovoltaic cell 10 is manufactured and the predetermined number of photovoltaic cells 10 are prepared (solar cell preparation process). At this time, the solar cell 10 is formed up to the front side collector electrode 11 and the back side collector electrode 12.
  • a plurality of solar cells 10 are connected by a tab wiring 20 by heating at a first temperature to form a string 10S (string formation).
  • the first temperature is, for example, 150 ° C. to 250 ° C.
  • the tab wiring 20 is attached to the solar battery cell 10 by thermocompression bonding using the conductive adhesive 21. That is, in the present embodiment, the first temperature is a heating temperature at the time of thermocompression bonding.
  • the tab wiring 20 and the solar battery cell 10 are bonded together by thermocompression bonding (heating and pressurization) for 10 seconds at a first temperature of 200 ° C.
  • a conductive adhesive paste SCP
  • a conductive adhesive film SCF
  • an anisotropic conductive film or a solder material is used. be able to.
  • a conductive adhesive paste is used as the conductive adhesive 21.
  • a conductive adhesive paste is disposed on the surface of the front-side collector electrode 11 (back-side collector electrode 12) of the solar battery cell 10 on the surface, and the tab wiring 20 is disposed on the bus-bar electrode. Then, the tab wiring 20 and the solar battery cell 10 can be electrically connected by thermocompression bonding with the thermocompression bonding apparatus.
  • the plurality of solar cells 10 is attached to the end of at least one solar battery cell 10 (light reflecting member attaching step).
  • the light reflecting member 30 is attached to each of the plurality of solar cells 10 in the light reflecting member attaching step.
  • the light reflecting member 30 is attached to each solar cell 10 so that the back surface of the resin base 31 of the light reflecting member 30 (the surface opposite to the surface on which the reflective film 32 is formed) faces the solar cell 10. Affixed to the edge.
  • the second temperature is, for example, 100 ° C. to 180 ° C., and is set to a temperature lower than the heat resistant temperature of the resin base material 31 constituting the light reflecting member 30.
  • the light reflecting member 30 is attached to the end of the solar battery cell so that a part of the light reflecting member 30 protrudes from the solar battery cell 10.
  • the end of the tape-like light reflecting member 30 in the width direction (short direction) is attached to the end of the solar battery cell 10.
  • the light reflecting member 30 is affixed to another side different from the one side where two adjacent solar cells 10 in the string 10 ⁇ / b> S face each other. That is, the light reflecting member 30 is attached to the side of the solar battery cell 10 constituting the gap between the two adjacent strings 10S.
  • the light reflecting member 30 is attached to the end portion of the solar battery cell 10 by thermocompression bonding using the resin adhesive 33. That is, in the present embodiment, the second temperature is a heating temperature at the time of thermocompression bonding.
  • the light reflecting member 30 and the solar battery cell 10 are bonded to each other by performing thermocompression bonding (heating and pressurizing) for 1 second at a second temperature of 150 ° C.
  • the resin adhesive 33 may be attached in advance to the back surface of the resin base 31 of the light reflecting member 30 before the light reflecting member attaching step.
  • EVA can be used as the resin adhesive 33.
  • the light reflecting member 30 is disposed in the solar battery cell 10 so that the surface of the resin adhesive 33 (EVA) is in contact with the solar battery cell 10, and then the light reflecting member 30 and the solar battery are disposed.
  • the light reflecting member 30 and the solar battery cell 10 can be bonded together by thermocompression bonding the cell 10 with a thermocompression bonding apparatus.
  • the resin adhesive 33 may be used in the light reflecting member pasting step instead of pasting the resin adhesive 33 on the resin base 31 in advance.
  • a resin adhesive 33 is provided on the end portion of the solar battery cell 10 or the light reflecting member 30, and the light reflecting member 30 and the solar battery cell 10 are temporarily bonded via the resin adhesive 33, and the light reflecting member 30.
  • the solar cell 10 and the solar cell 10 can be bonded together by thermocompression bonding using the thermocompression bonding apparatus.
  • the tab wiring 20 is produced by cutting a thin metal foil wound around a bobbin into a strip shape while pulling out, so that the tab wiring 20 has a shape distortion due to winding. ing.
  • the attaching accuracy of the light reflecting member 30 may be measured, and the measured attaching accuracy may be fed back to the light reflecting member attaching step.
  • the pasting accuracy of the light reflecting member 30 can be measured by image recognition.
  • the solar cell 10 (or string 10S) is imaged after the light reflecting member 30 is pasted using an imaging device such as a camera, and the correct light reflecting member in each solar cell 10 for each light reflecting member 30.
  • the deviation from the position 30 or the deviation from the reference line of the correct string is measured as the attaching accuracy of the light reflecting member 30.
  • this measurement result is fed back to the light reflecting member pasting step.
  • the bonding position of the light reflecting member 30 of each solar battery cell 10 in the string 10S is changed as necessary.
  • the bonding position of the light reflecting member 30 is adjusted so that the gap between the adjacent strings 10 ⁇ / b> S is covered by the light reflecting member 30 in any solar battery cell 10. That is, in order to absorb the straightness shift in the string 10S, the setting of the bonding position of the light reflecting member 30 is changed so that the center lines of the light reflecting members 30 arranged in the longitudinal direction of the string 10S coincide.
  • the straightness shift in the string 10 ⁇ / b> S may be different for each solar battery cell 10, so that the adjustment amount of the bonding position of each light reflecting member 30 may be different for each solar battery cell 10. Good.
  • the pasting accuracy of the light reflecting member 30 is measured by image recognition, but may be measured by a method other than image recognition.
  • a plurality of strings 10S are set (setting process). Specifically, the plurality of strings 10S are arranged so that the solar cells 10 are in a two-dimensional array. In the present embodiment, the six strings 10S are arranged so as to be parallel to each other.
  • the six strings 10S are arranged by the light reflecting member 30 bonded to the solar battery cell 10 so as to cover the gap between the two adjacent strings 10S.
  • the solar cell panel 2 is produced by thermocompression bonding the laminated body of the surface protection member 40, the photovoltaic cell 10, the resin sheet 60S, and the back surface protection member 50 (lamination process). . Specifically, a plurality of set strings 10S are sandwiched between two EVA sheet resin sheets 60S, and a surface protection member 40 and a back surface protection member 50 are arranged above and below to prepare a laminate. And this laminated body is thermocompression-bonded (heating and crimping
  • the solar cell panel 2 is subjected to a heat treatment at around 150 ° C. in order to cause crosslinking that strengthens the molecular bonds of the resin in the filling member 60 (curing step).
  • This step is preferably performed when EVA is used as the material of the filling member 60 (resin sheet 60S), but is not necessarily performed.
  • the frame 70 is attached to the solar cell panel 2 (framing process). Specifically, the frame 70 is fixed to the peripheral edge of each of the four sides of the solar cell panel 2 with an adhesive such as silicone resin.
  • the terminal box 80 is attached to the back surface protection member 50. At this time, a silicone resin is potted in the terminal box 80. Thereby, the solar cell module 1 is obtained.
  • output measurement (finished product inspection) of the solar cell module 1 is performed thereafter.
  • the gap between two adjacent solar cells is an invalid area that does not contribute to power generation.
  • the inventor of the present application arranges a light reflecting member in a gap between two adjacent solar cells, reflects light incident on the gap by the light reflecting member, and guides the light to the solar cell. We thought to make light incident on the gap contribute to power generation. Specifically, the light reflection member was considered to be attached to the end portion of the solar battery cell.
  • the light reflecting member can be placed on the solar cell 10 with higher accuracy by attaching the light reflecting member to the solar cell before stringing the solar cell 10.
  • the photovoltaic cell 10 is manufactured and the predetermined number of photovoltaic cells 10 are prepared.
  • the light reflecting member 30 is bonded to the solar battery cell 10 by thermocompression bonding using a resin adhesive such as EVA.
  • a plurality of solar cells 10 each provided with a light reflecting member 30 are connected by a tab wiring 20 to form a string 10S.
  • a tab wiring 20 is connected by thermocompression bonding using a conductive adhesive paste (SCP).
  • SCP conductive adhesive paste
  • the light reflecting member 30 is deformed by heat at the time of thermocompression bonding when the tab wiring 20 and the solar battery cell 10 are bonded together. I understood that.
  • the effect of improving the power generation efficiency due to the introduction of the light reflecting member is diminished.
  • the deformed light reflecting member 30 the light reflected by the light reflecting member 30 cannot be efficiently guided to the solar battery cell 10, or the gap between two adjacent solar battery cells 10 is covered with the light reflecting member 30. It becomes impossible.
  • the inventor of the present application considered manufacturing the solar cell module 1 by the method shown in FIGS. 6 and 7 described above.
  • the temperature (first temperature) is lower than the temperature (first temperature) when the string 10S is formed after the string 10S is formed.
  • the light reflecting member 30 is attached to the solar battery cell 10 at the second temperature.
  • the temperature at which the light reflecting member 30 and the solar cell 10 are thermocompression bonded (second temperature). It is better that there is no process for performing the treatment at a temperature exceeding.
  • the processing temperature in the laminating process and the curing process may be lower than the second temperature.
  • the manufacturing method of the solar cell module 1 in this Embodiment it can arrange
  • FIG. thereby, since the light which entered into the invalid area
  • the light reflecting member 30 is provided at the end of the solar battery cell 10.
  • the light reflecting member 30 is formed by forming the reflecting film 32 on the surface of the resin base material 31.
  • the back surface of the resin base material 31 is a solar cell.
  • the light reflecting member 30 is affixed to the end portion of the solar battery cell so as to face 10. At this time, the second temperature when the light reflecting member 30 is affixed may be lower than the heat resistant temperature of the resin base material 31.
  • the light reflecting member 30 when the light reflecting member 30 is attached to the solar battery cell 10, the light reflecting member 30 can be prevented from being deformed.
  • the attaching accuracy of the light reflecting member 30 is measured, and the measured attaching accuracy is fed back to the light reflecting member attaching step. Good.
  • the attaching accuracy of the light reflecting member 30 is fed back.
  • the deviation in straightness of the string 10S can be absorbed by adjusting the position where the light reflecting member 30 is attached.
  • the string can be obtained by adjusting the pasting position of the light reflecting member 30.
  • the said clearance gap can be covered over 10S whole. Therefore, the power generation efficiency of the solar cell module 1 can be further improved.
  • the pasting accuracy of the light reflecting member 30 may be measured by image recognition.
  • the attaching accuracy of the light reflecting member 30 can be measured accurately and easily.
  • the light reflecting member 30 is attached to each of the plurality of solar cells 10.
  • the light reflecting member 30 is attached to the end of the solar battery cell 10 so that a part of the light reflecting member 30 protrudes from the solar battery cell 10.
  • the light reflecting member 30 can be disposed in a gap (ineffective region) between two adjacent solar cells 10. Thereby, since the light which injects into the clearance gap between the photovoltaic cells 10 can be reflected with the light reflection member 30, and can be guide
  • the tape-shaped light reflecting member 30 extending in the longitudinal direction of the string 10 ⁇ / b> S is arranged so that the end portion in the width direction of the light reflecting member 30 overlaps the end portion of the solar battery cell 10. It is affixed on the end of the solar battery cell 10.
  • the light reflecting member 30 can be disposed along the longitudinal direction of the string 10S in the gap (ineffective region) between the two adjacent strings 10S. Therefore, since the gap between the two adjacent strings 10S can be covered in a wide range, the incident light can be reflected by the light reflecting member 30 and guided to the solar battery cell 10. As a result, the power generation efficiency of the solar cell module 1 can be further improved.
  • the string 10S is comprised so that the one sides of a substantially rectangular photovoltaic cell may oppose, and it differs from the one side which two photovoltaic cells 10 adjacent in the string 10S oppose.
  • the light reflecting member 30 is attached to the other side. That is, the light reflecting member 30 is attached to one side of the solar battery cell 10 that forms a gap between two adjacent strings 10S.
  • the tab wiring 20 is affixed on the photovoltaic cell 10 by the thermocompression bonding using the conductive adhesive 21 in a string formation process, and it is resin adhesive in a light reflection member affixing process.
  • the light reflecting member 30 is attached to the end portion of the solar battery cell 10 by thermocompression bonding using 33.
  • the resin adhesive 33 is affixed in advance to the light reflecting member 30 before performing the light reflecting member affixing step.
  • the light reflecting member 30 can be attached to the solar battery cell 10 easily and reliably.
  • the two light reflecting members 30 are provided in one solar cell 10 except for the solar cell 10 of the outermost string 10S.
  • the present invention is not limited to this.
  • two light reflecting members 30 may be provided in each of all the solar cells 10, or there may be solar cells 10 in which the light reflecting member 30 is not provided in the internal string 10S.
  • the number of the light reflecting members 30 provided in one solar battery cell 10 may be one or three or more instead of two.
  • the light reflecting member 30 may be provided on each of the four sides of the solar battery cell 10, or a plurality of light reflecting members 30 may be provided on each side.
  • the two light reflecting members 30 are disposed in the gap between the two adjacent strings 10S.
  • one light reflecting member 30 may be disposed in a gap between two adjacent strings 10S.
  • the gap between two adjacent strings 10 ⁇ / b> S may be covered with one light reflecting member 30. That is, you may arrange
  • the light reflecting member 30 is disposed in the gap between the two adjacent strings 10S, but the present invention is not limited to this.
  • the semiconductor substrate of the solar cell 10 is an n-type semiconductor substrate, but may be a p-type semiconductor substrate.
  • the solar cell module 1 is a double-sided light receiving method in which both the front surface protection member 40 and the back surface protection member 50 are light receiving surfaces, but is not limited thereto.
  • a single-sided light receiving method in which only one of the surface protecting member 40 and the back surface protecting member 50 (for example, the surface protecting member 40) is a light receiving surface may be used.
  • the p-side surface electrode does not need to be transparent, and may be a reflective metal electrode, for example.
  • the semiconductor material of the photoelectric conversion part of the solar battery cell 10 is silicon, but is not limited thereto.
  • a semiconductor material of the photoelectric conversion part of the solar battery cell 10 gallium arsenide (GaAs), indium phosphide (InP), or the like may be used.

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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 un procédé de fabrication d'un module de batterie solaire (1), comprenant : une étape de formation de chaîne à laquelle une pluralité de cellules de batterie solaire (10) sont couplées par des fils de connexion (20) et une chaîne (10S) est formée, en résultat d'un chauffage à une première température ; et une étape de collage d'élément réfléchissant la lumière à laquelle, après l'étape de formation de chaîne, un élément réfléchissant la lumière (30) est collé sur une section d'extrémité d'au moins une cellule de batterie solaire (10) parmi la pluralité de cellules de batterie solaire (10), en résultat d'un chauffage à une seconde température qui est inférieure à la première température.
PCT/JP2016/000540 2015-03-10 2016-02-03 Procédé de fabrication de module de batterie solaire WO2016143250A1 (fr)

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JP2015-047764 2015-03-10
JP2015047764 2015-03-10

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JP2022526774A (ja) * 2020-02-17 2022-05-26 横店集団東磁股▲ふん▼有限公司 ブラインド太陽光発電羽根

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JP2006073707A (ja) * 2004-09-01 2006-03-16 Kyocera Corp 太陽電池モジュール
WO2010021204A1 (fr) * 2008-08-22 2010-02-25 三洋電機株式会社 Module de cellule solaire, cellule solaire et procédé de fabrication de module de cellule solaire
JP2010287688A (ja) * 2009-06-10 2010-12-24 Mitsubishi Electric Corp 太陽電池モジュール
JP2013098496A (ja) * 2011-11-04 2013-05-20 Mitsubishi Electric Corp 太陽電池モジュールおよびその製造方法
WO2014066265A1 (fr) * 2012-10-25 2014-05-01 Sunpower Corporation Module de cellule solaire biface ayant un réflecteur côté arrière

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CN102664210B (zh) * 2012-05-14 2015-05-06 友达光电股份有限公司 太阳能模块与其制造方法
JP6280692B2 (ja) * 2013-03-21 2018-02-14 デクセリアルズ株式会社 太陽電池モジュール、及び結晶系太陽電池モジュールの製造方法
JP2014207305A (ja) * 2013-04-12 2014-10-30 三洋電機株式会社 太陽電池モジュール

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JP2006073707A (ja) * 2004-09-01 2006-03-16 Kyocera Corp 太陽電池モジュール
WO2010021204A1 (fr) * 2008-08-22 2010-02-25 三洋電機株式会社 Module de cellule solaire, cellule solaire et procédé de fabrication de module de cellule solaire
JP2010287688A (ja) * 2009-06-10 2010-12-24 Mitsubishi Electric Corp 太陽電池モジュール
JP2013098496A (ja) * 2011-11-04 2013-05-20 Mitsubishi Electric Corp 太陽電池モジュールおよびその製造方法
WO2014066265A1 (fr) * 2012-10-25 2014-05-01 Sunpower Corporation Module de cellule solaire biface ayant un réflecteur côté arrière

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022526774A (ja) * 2020-02-17 2022-05-26 横店集団東磁股▲ふん▼有限公司 ブラインド太陽光発電羽根

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