WO2024012160A1 - Ibc solar cell module and manufacturing method thereof, and ibc solar cell module string - Google Patents

Ibc solar cell module and manufacturing method thereof, and ibc solar cell module string Download PDF

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Publication number
WO2024012160A1
WO2024012160A1 PCT/CN2023/101105 CN2023101105W WO2024012160A1 WO 2024012160 A1 WO2024012160 A1 WO 2024012160A1 CN 2023101105 W CN2023101105 W CN 2023101105W WO 2024012160 A1 WO2024012160 A1 WO 2024012160A1
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Prior art keywords
battery
low
battery sheet
solar cell
sheet
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PCT/CN2023/101105
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French (fr)
Chinese (zh)
Inventor
雷楠
左燕
郭永刚
孙蛟
周西勇
杨紫琪
王锐
Original Assignee
青海黄河上游水电开发有限责任公司西宁太阳能电力分公司
青海黄河上游水电开发有限责任公司西安太阳能电力分公司
青海黄河上游水电开发有限责任公司
国家电投集团黄河上游水电开发有限责任公司
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Publication of WO2024012160A1 publication Critical patent/WO2024012160A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/022433—Particular geometry of the grid contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/02002—Arrangements for conducting electric current to or from the device in operations
    • H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
    • H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
    • H01L31/022458—Electrode arrangements specially adapted for back-contact solar cells for emitter wrap-through [EWT] type solar cells, e.g. interdigitated emitter-base back-contacts
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—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
    • H01L31/06—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 characterised by potential barriers
    • H01L31/068—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 characterised by potential barriers the potential barriers being only of the PN homojunction type, e.g. bulk silicon PN homojunction solar cells or thin film polycrystalline silicon PN homojunction solar cells
    • H01L31/0682—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 characterised by potential barriers the potential barriers being only of the PN homojunction type, e.g. bulk silicon PN homojunction solar cells or thin film polycrystalline silicon PN homojunction solar cells back-junction, i.e. rearside emitter, solar cells, e.g. interdigitated base-emitter regions back-junction 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
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/1804—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof comprising only elements of Group IV of the Periodic Table
    • 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
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/1876—Particular processes or apparatus for batch treatment of the devices
    • H01L31/188—Apparatus specially adapted for automatic interconnection of solar cells in a module
    • 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 invention belongs to the technical field of solar cell components, and specifically relates to an IBC solar cell string, an IBC solar cell component and a manufacturing method thereof.
  • the photovoltaic industry is developing rapidly under the energy crisis.
  • the key to further promoting photovoltaic applications is to improve the photoelectric conversion efficiency of solar cells and reduce the production cost of cells.
  • the positive and negative electrodes of IBC (Interdigitated back contact) solar cells are designed on the backlight surface of the battery, and there is no grid line obstruction on the front side, thus avoiding the obstruction of the front grid electrode of conventional cells.
  • the optical loss caused increases the short-circuit current and conversion efficiency of the battery.
  • the electrodes of traditional IBC solar cells are mainly composed of main grid lines and auxiliary grid lines.
  • the auxiliary grid lines are used to collect current, and the main grid lines are used to collect the current collected by the auxiliary grid lines and export the current by welding with welding ribbons.
  • main grid electrodes and auxiliary grid electrodes are generally made of screen-printed conductive silver paste, which requires a large amount of silver paste, resulting in high cost of solar cell modules.
  • busbar-less cell technology emerged as the times require.
  • Cells without main grid lines generally refer to conventional cells with the main grid lines removed and thin grid lines retained; this type of cell sheet can reduce the use of silver paste because it no longer requires main grid lines. Applying the busbar-less cell technology to IBC batteries to form busbar-less IBC batteries can greatly reduce the use of silver paste, thereby effectively reducing the production cost of IBC batteries.
  • the emitter electrode and base electrode of IBC cells are designed on the back of the cell.
  • the welding and interconnection of the cells on the component side are also performed on the back of the cell.
  • the front and back of the cell are unevenly stressed.
  • Traditional infrared welding The higher the temperature, the easier it is for the cells to warp after welding, which affects the component yield and is not conducive to the development of thin battery cells.
  • the present invention provides an IBC solar cell module, a manufacturing method thereof, and an IBC solar cell string.
  • the solar cell module includes a plurality of alternately arranged first battery sheets and second battery sheets, and the first battery sheet and the second battery sheet are The positive electrode fine grid lines and the negative electrode fine grid lines are evenly distributed on the back of the battery sheet, and the positive electrode fine grid lines and the negative electrode fine grid lines are alternately arranged and parallel to each other; the first battery sheet and the second battery sheet All are IBC solar cells without main grid;
  • the positive and negative electrode thin grid lines of the adjacent first battery sheet and the second battery sheet are connected through conductive strips to achieve series connection of each battery sheet, wherein the conductive strips include parallel and alternately arranged third cells.
  • a low-temperature welding wire and a second low-temperature welding wire are vertically connected to the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet.
  • the second low temperature welding wire The low-temperature welding wire is vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet.
  • the number of first low-temperature welding wires and second low-temperature welding wires of the conductive strip is equal, and the first low-temperature welding wire and the second low-temperature welding wire Both extend along the arrangement direction of the battery sheets, and the first low-temperature welding wire and the second low-temperature welding wire are alternately distributed along the vertical direction of the arrangement direction of the battery sheets.
  • the positive and negative thin grid lines of the first cell sheet and the second cell sheet are along the vertical direction of the arrangement direction of the cell sheets. extending upward, and the positive electrode fine grid lines and the negative electrode fine grid lines of the first battery sheet and the second battery sheet are staggered along the arrangement direction of the battery sheets.
  • solder paste solder joints are provided on predetermined areas of the positive and negative electrode thin grid lines of the first cell sheet and the second cell sheet, wherein, the first low-temperature welding wire is vertically connected to the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet through the solder paste solder joint; the third Two low-temperature welding wires are vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet through the solder paste solder joint.
  • the positive and negative electrode thin grid lines of the first cell sheet and the second cell sheet opposite to the area outside the predetermined area Coated with insulating glue wherein the first low-temperature welding wire passes through the insulating glue to avoid formation with the first negative electrode fine grid line of the first battery sheet and the second positive electrode fine grid line of the second battery sheet Contact; the second low-temperature welding wire passes through the insulating glue to avoid contact with the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet.
  • the conductive tape further includes a base layer and an adhesive layer, wherein the adhesive layer is laminated on the base layer, and the first The low temperature welding wire and the second low temperature welding wire are fixed on the adhesive layer.
  • the main grid-less IBC solar cell module further includes a front glass, a first encapsulating adhesive film, a second encapsulating adhesive film and a backsheet layer, wherein , the first encapsulating film covers the battery front side of the first battery sheet and the second battery sheet; the conductive tape covers the battery back side of the first battery sheet and the second battery sheet; The second encapsulation film covers the conductive tape; the front glass is disposed on the first encapsulation film, and the backplane layer is disposed on the second encapsulation film.
  • an IBC solar cell string includes a plurality of the above-mentioned IBC solar cell modules, and the IBC solar cell modules are connected in parallel.
  • a method for manufacturing an IBC solar cell module includes:
  • first low-temperature welding wires and second low-temperature welding wires that are parallel to each other and alternately arranged on the adhesive layer to form a conductive strip
  • the first low-temperature welding wire is vertically connected to the first positive electrode thin grid line of the first battery piece and the second negative electrode thin grid line of the second battery piece, and the second low-temperature welding wire Vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet to achieve series connection of each battery sheet; wherein, the first battery sheet and the second battery sheet
  • the positive and negative electrode fine grid lines of the two battery sheets both extend in the vertical direction of the arrangement direction of the battery sheets, and the positive electrode fine grid lines and the negative electrode fine grid lines of the first battery sheet and the second battery sheet extend along
  • the cells are staggered in the arrangement direction of the cells, and the first cells and the second cells are both main grid-less IBC solar cells.
  • the manufacturing method further includes:
  • the battery strings are interconnected on the first packaging film according to the component circuit layout, the front side of the battery sheet is in contact with the first packaging film, the first packaging film is laminated on the front glass, and then the second packaging film is The film and backplane layers are laminated on the battery string in sequence, and the second encapsulating adhesive film and the base layer of the conductive tape Contact, the backplane layer is in contact with the second packaging film;
  • the stacked structures are laminated to form an integrated battery module structure.
  • the IBC solar cell module provided by the present invention replaces the main grid wires on the back of the IBC cells by using low-temperature welding wire on the conductive tape to realize interconnection welding and current collection between the IBC cells, thereby eliminating the need for conventional IBC cells.
  • the main grid lines in the chip reduce the usage of silver paste, which in turn helps reduce the manufacturing cost of IBC solar cell modules.
  • by forming multiple low-temperature welding wires on the conductive tape it is beneficial to shorten the transmission distance of the current and reduce the series resistance of the cells, thereby improving the efficiency of the solar cell module; and the greater the number of low-temperature welding wires, the more It is conducive to improving the crack tolerance of cells, thereby conducive to improving the performance of solar cell modules.
  • the manufacturing method of IBC solar cell modules provided by the present invention adopts laminated low-temperature welding to bond and fix the IBC cells to the conductive tape, which is beneficial to alleviating the uneven welding stress caused by conventional infrared welding.
  • the resulting cells will be warped, which will help reduce the fragmentation rate of the cells and improve the module yield.
  • Thinner silicon wafers can be used to further reduce the cost of battery components.
  • Figure 1 is a schematic structural diagram of an IBC solar cell module according to an embodiment of the present invention.
  • Figure 2 is a schematic structural diagram of a cell sheet of an IBC solar cell module according to an embodiment of the present invention
  • Figure 3 is a schematic structural diagram of a conductive strip of an IBC solar cell module according to an embodiment of the present invention.
  • Figure 4 is a front view of another conductive strip of an IBC solar cell module according to an embodiment of the present invention.
  • Figure 5 is a schematic diagram of an arrangement and installation of cells of an IBC solar cell module according to an embodiment of the present invention.
  • Figure 6 is a schematic diagram of another embodiment of the arrangement and installation of cells in an IBC solar cell string according to an embodiment of the present invention.
  • FIG. 7 is a flow chart of a method of manufacturing an IBC solar cell module according to an embodiment of the present invention.
  • the term "includes” and variations thereof represent an open term meaning “including, but not limited to.”
  • the terms “based on”, “according to”, etc. mean “based at least in part on”, “based at least in part on”.
  • the terms “one embodiment” and “an embodiment” mean “at least one embodiment.”
  • the term “another embodiment” means “at least one other embodiment”.
  • the terms “first”, “second”, etc. may refer to different or the same object. Other definitions may be included below, whether explicit or implicit. The definition of a term is consistent throughout this specification unless the context clearly dictates otherwise.
  • the welding and interconnection between the battery sheets to form the battery components are all done on the back of the battery, which can easily lead to uneven stress on the front and back of the battery.
  • cell warping is prone to occur, which affects component yield and is not conducive to the development of thin battery cells.
  • the positive and negative electrode interconnections of the busbarless IBC battery belong to the same side interconnection, and the conventional wire film composite method cannot meet the requirements.
  • an IBC solar cell module and a manufacturing method thereof are provided according to embodiments of the present invention.
  • IBC solar array string IBC solar array string.
  • the IBC solar cell module, its manufacturing method, and the IBC solar cell string according to embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
  • FIG. 1 is a schematic structural diagram of an IBC solar cell module according to an embodiment of the present invention.
  • the IBC solar cell module includes: a front glass 10 , a first encapsulating film 20 , a plurality of cells 30 , a conductive tape 40 , a second encapsulating film 50 and a backsheet layer 60 .
  • the first encapsulation adhesive film and the second encapsulation adhesive film are EVA or POE or co-extruded POE formed by co-extrusion of EVA and POE.
  • the backplane layer is a glass backplane or a transparent backplane or a white backplane or a black backplane or black inside and outside. White back panel.
  • the plurality of battery sheets 30 include a plurality of first battery sheets and second battery sheets that are alternately arranged.
  • the first battery sheets and the second battery sheets may be alternately arranged in the form of whole sheets or slices.
  • the cell spacing between the plurality of battery cells 30 is arranged using a small spacing or a negative spacing as required. By adopting a cell arrangement design with small or negative spacing, it is helpful to further improve the efficiency of solar cell modules.
  • the first encapsulating film 20 covers the battery fronts of the first battery sheet and the second battery sheet;
  • the conductive tape 40 covers the battery surfaces of the first battery sheet and the second battery sheet.
  • the second encapsulation film 50 covers the conductive tape 40;
  • the front glass 10 is disposed on the first encapsulation film 20, and the backplane layer 60 is disposed on the second encapsulation film 50 on.
  • FIG. 2 is a schematic structural diagram of a cell sheet of an IBC solar cell module according to an embodiment of the present invention. Refer to FIG. 2 .
  • the battery sheet 30 may be a first battery sheet or a second battery sheet.
  • the first cell sheet and the second cell sheet are both busbarless IBC solar cells.
  • the back side of the battery sheet 30 is provided with fine grid lines 31 that are evenly distributed and parallel to each other.
  • the fine grid lines 31 include positive electrode fine grid lines and negative electrode fine grid lines.
  • first positive grid line and the first negative grid line of the first battery sheet are evenly distributed on the back side of the first battery sheet;
  • the second positive grid line and the second negative electrode grid of the second battery sheet are The lines are evenly distributed on the back side of the second battery sheet.
  • the positive and negative electrode thin grid lines of the first battery sheet and the second battery sheet are parallel to each other and arranged alternately.
  • the positive and negative electrode thin grid lines of the first battery sheet and the second battery sheet both extend in the vertical direction along the arrangement direction of the battery sheets 30 , and the first battery sheet and the second battery sheet The positive electrode fine grid lines and the negative electrode fine grid lines of the second battery sheet are alternately distributed along the arrangement direction of the battery sheets 30 .
  • Figure 3 is a schematic structural diagram of a conductive strip of an IBC solar cell module according to an embodiment of the present invention.
  • the conductive tape 40 includes a low-temperature welding wire 41 , an adhesive layer 42 and a base layer 43 .
  • the low-temperature welding wire 40 includes a first low-temperature welding wire and a second low-temperature welding wire, and the first low-temperature welding wire and the second low-temperature welding wire are arranged parallel to each other and alternately.
  • the number of the first low-temperature welding wire and the second low-temperature welding wire is equal, and the number of the first low-temperature welding wire and the second low-temperature welding wire is N>9.
  • the first low-temperature welding wire and the second low-temperature welding wire both extend along the arrangement direction of the battery sheets 30 .
  • the first low-temperature welding wire and the second low-temperature welding wire are alternately distributed along the vertical direction of the arrangement direction of the battery sheets 30 .
  • the adhesive layer 42 is laminated on the base layer 43 , and the low-temperature welding wire 41 is disposed on the adhesive layer 42 .
  • the adhesive layer 42 is made of polyolefin material, the melting point of the adhesive layer 42 is 70°C to 120°C, and the thickness is 75 ⁇ m to 200 ⁇ m.
  • the maximum fluidity of the adhesive layer 42 is lower than that of the first encapsulating adhesive film 20 and the second encapsulating adhesive film 50 . Both sides of the adhesive layer 42 have viscosity, so that one side can be bonded to the low-temperature welding wire and the other side can be bonded to the base layer 43 .
  • the thickness of the base layer 43 is 12 ⁇ m to 25 ⁇ m, and the melting point is greater than 150°C.
  • the base layer 43 is a polyolefin adhesive film, and a water-blocking molecular material is added to the base layer.
  • the base layer 43 has no fluidity at the lamination temperature, thereby ensuring that the low-temperature welding wire 41 will not be twisted or deflected during the lamination process, and at the same time preventing the second encapsulating adhesive film 50 from being distorted during the lamination process.
  • the medium flows between the low-temperature welding wire 41 and the battery piece 30, causing the insulation between the battery piece 30 and the low-temperature welding wire 41 to cause the problem of excessive series resistance and the short-circuit problem caused by the offset of the welding strip, which has a water-blocking effect. , prevent water vapor from entering the cells and improve the aging resistance of solar cell modules.
  • the coating of the low-temperature welding wire 41 is selected from tin-bismuth-silver alloy or tin-bismuth alloy with a melting point of 110°C to 145°C.
  • the cross section of the low temperature welding wire 41 is circular or rectangular. When the cross section is circular, the diameter of the circular cross section is 0.15mm ⁇ 0.3mm. When the cross section is rectangular, the thickness of the low-temperature welding wire 41 is 0.12 mm to 0.25 mm, and the width is 0.4 mm to 0.6 mm.
  • the first low-temperature welding wire is vertically connected to the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet
  • the second low-temperature welding wire is connected to The first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet are vertically connected.
  • the first positive electrode thin grid line of the first battery piece can be connected to the second negative electrode thin grid line of the adjacent second battery piece. , or connect the first negative electrode thin grid line of the first battery piece to the second positive electrode thin grid line of the adjacent second battery piece, so that the polarities on the two adjacent battery pieces 30 are opposite.
  • the positive and negative electrode thin grid lines are electrically connected in sequence to realize the series connection of each battery piece 30.
  • the usage amount of silver paste can be reduced by more than 65%.
  • the low-temperature welding wires 41 are formed on the conductive tape 40, it is beneficial to shorten the transmission distance of the current and reduce the series resistance of the cell 30, which is beneficial to improving the efficiency of the solar cell module; in addition, the low-temperature The greater the number of welding wires 41, the more conducive to improving the crack tolerance of the cell sheet 30, thereby improving the performance of the solar cell module.
  • solder paste is provided on a predetermined area of the fine grid lines 31 of the battery piece 30 .
  • solder joint 32 wherein the first low-temperature solder wire passes through the solder paste solder joint 32 and is perpendicular to the first positive electrode fine grid line of the first battery sheet and the second negative electrode fine grid line of the second battery sheet. Connection; the second low-temperature solder wire is vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet through the solder paste solder joint 32.
  • the height of the solder paste solder joint 32 is 20 ⁇ m to 100 ⁇ m.
  • the thin grid lines 31 of the battery sheet 30 opposite to the area outside the predetermined area are coated with insulating glue 33 , wherein the first low-temperature welding wire passes through the insulating glue 33 To avoid contact with the first negative electrode fine grid line of the first cell sheet and the second positive electrode fine grid line of the second cell sheet; the second low-temperature welding wire passes through the insulating glue 33 to avoid contact with the The first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet form contact.
  • the positive electrode fine grid lines and the negative electrode fine grid lines of the first battery sheet and the second battery sheet are alternately distributed along the arrangement direction of the battery sheet 30, by using the insulating glue 33, it is possible to avoid the same problem.
  • a low-temperature welding wire 41 comes into contact with the thin grid lines 31 of different polarities of the same battery piece 30, causing a short circuit in the battery.
  • multiple groups of adjacent positive and negative electrodes with opposite electrode polarities can be formed in the vertical direction of the extension direction of the thin gate line 31, wherein the positive and negative electrodes in each group are The positive pole (or negative pole) is marked with MARK point M.
  • first thin lines perpendicular to the thin grid lines 31 are provided at both ends of the edges of the battery sheets 30 or segments of the battery sheets 30 .
  • the first thin grid line 34 is located between the thin grid line 31 and the solder paste solder joint 32 , and/or the insulating glue 33 .
  • the length of the first thin grid line 34 is ⁇ 10 mm.
  • the conductive tape 40 further includes a plurality of regularly arranged holes 44 , and the holes 44 penetrate the low-temperature welding wire 41 .
  • the hole 44 may be circular or rectangular.
  • Figure 5 is an arrangement and installation of cells of an IBC solar cell module according to an embodiment of the present invention. Schematic diagram of the embodiment. In order to simplify the explanation of the arrangement and installation of the cells in the IBC solar cell module, the front glass 10, the first encapsulating film 20 and the second encapsulating film in the IBC solar cell module are omitted in Figure 5.
  • the adhesive film 50 and the backsheet layer 60 only indicate the cells 30 and conductive strips 40 in the IBC solar cell module.
  • adjacent battery sheets 30 are connected through the conductive strips 40 to realize series connection of each battery sheet 30 .
  • an IBC solar cell string includes a plurality of the above-mentioned IBC solar cell modules, and the IBC solar cell modules are connected in parallel.
  • the IBC solar cell string also includes a bus belt 70, through the bus belt 70, the IBC solar cell components are connected in parallel to obtain the IBC solar cell string.
  • FIG. 6 is a schematic diagram of an arrangement and installation of cells of an IBC solar cell string according to an embodiment of the present invention.
  • the front glass 10, the first encapsulating film 20, the second encapsulating film 50 and the backsheet layer 60 of the IBC solar cell module in the IBC solar cell string are omitted in Figure 6, and only the The cells 30, conductive strips 40 and bus strips 70 in the IBC solar cell string.
  • the adjacent battery pieces 30 in the IBC solar cell module are connected through the conductive strip 40 to realize the series connection of each cell piece 30 , and the IBC solar cell modules are connected through the busbar. Take 70 for parallel connection.
  • FIG. 7 is a flow chart of a method of manufacturing an IBC solar cell module according to an embodiment of the present invention. Referring to Figure 7, the manufacturing method includes step S610, step S620, step S630 and step S620.
  • step S610 several first low-temperature welding wires and second low-temperature welding wires that are parallel to each other and alternately arranged are formed on the adhesive layer 42 to form the conductive strip 40 .
  • first low-temperature welding wires and the second low-temperature welding wires are positioned parallel to each other at equal intervals and alternately placed on the adhesive layer 42 , and then the first low-temperature welding wires and the second low-temperature welding wires are pressed together by hot pressing.
  • the second low-temperature welding wire is thermally pressed with the adhesive layer 42 and the base layer 43 to form the conductive strip 40 .
  • the manufacturing method further includes:
  • the conductive strip 40 is punched to form a hole 44 penetrating the first low temperature welding wire and/or the second low temperature welding wire.
  • step S620 a plurality of first battery sheets and a number of second battery sheets are arranged sequentially on the conductive tape 40, and hot pressing is performed (hot pressing temperature: 120-250°C, time: 5-15 seconds), so as to convert the plurality of first battery sheets and second battery sheets on the conductive tape 40.
  • the first battery sheet and the second battery sheet are bonded and fixed with the conductive tape to form a battery string; wherein the first low-temperature welding wire and the first positive electrode thin grid line of the first battery sheet and the second
  • the second negative electrode thin grid line of the battery sheet is vertically connected, and the second low-temperature welding wire is vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode fine grid line of the second battery sheet. , realizing the series connection of each battery piece 30.
  • the manufacturing method before arranging a plurality of first battery sheets and second battery sheets on the conductive tape 40 in sequence, the manufacturing method further includes:
  • Solder paste solder joints 32 are formed on predetermined areas of the fine grid lines 31 of the battery sheet 30 , and are coated on the thin grid lines 31 of the battery sheet 30 opposite to areas outside the predetermined area. Insulating glue 33.
  • the first low-temperature solder wire is vertically connected to the first positive electrode fine grid line of the first cell sheet and the second negative electrode fine grid line of the second cell sheet through the solder paste solder joint 32;
  • the second low-temperature solder wire is vertically connected to the first negative electrode thin grid line of the first cell sheet and the second positive electrode thin grid line of the second cell sheet through the solder paste solder joint 32 .
  • the conductive tape 40 is laid and fixed, the first battery sheets and the second battery sheets are alternately arranged and placed on the conductive tape 40 , and the battery back side of the battery sheet 30 is aligned with the battery sheet 30 .
  • the conductive tape 40 is in contact, wherein the solder paste solder joints 32 on the back of the battery sheet 30 correspond to the first low-temperature welding wire and/or the second low-temperature welding wire, and then the battery sheet 30 is heated through a heating plate. Hot pressing is performed to bond and fix the battery sheet 30 and the conductive tape 40 .
  • step S630 the battery strings are interconnected on the first packaging film 20 according to the component circuit layout, the front side of the battery piece is in contact with the first packaging film 20, the first packaging film is laminated on the front glass 10, and then the The second encapsulating adhesive film 50 and the backplane layer 60 are laminated on the battery string in sequence.
  • the second encapsulating adhesive film is in contact with the base layer 43 of the conductive tape 40
  • the backplane layer is in contact with the second encapsulating adhesive film 50 .
  • step S640 the stacked structures are laminated to form an integrated battery module structure, and the lamination temperature is 135°C to 150°C.
  • EL testing is performed on the integrated battery structure to mainly detect defects such as battery splinters and short circuits.
  • the IBC solar cell module uses low-temperature welding wire on the conductive strip to replace the main grid wires on the back of the IBC cells to realize interconnection welding and current collection between the IBC cells, thereby eliminating the need for conventional
  • the main grid lines in IBC cells reduce the usage of silver paste, which in turn helps reduce the manufacturing cost of IBC solar cell modules.
  • by forming multiple low-temperature welding wires on the conductive tape it is beneficial to shorten the transmission distance of the current and reduce the series resistance of the cells, thereby improving the efficiency of the solar cell module; and the greater the number of low-temperature welding wires, the more It is conducive to improving the crack tolerance of cells, thereby conducive to improving the performance of solar cell modules.
  • the manufacturing method of IBC solar cell modules provided by the present invention adopts laminated low-temperature welding to bond and fix the IBC cells to the conductive tape, which is beneficial to alleviating the uneven welding stress caused by conventional infrared welding.
  • the resulting cells will be warped, which will help reduce the fragmentation rate of the cells and improve the module yield.
  • Thinner silicon wafers can be used to further reduce the cost of battery components.

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Abstract

Provided is an IBC solar cell module. The solar cell module comprises a plurality of first battery cells and a plurality of second battery cells which are arranged alternately. Positive and negative fine gate lines of the adjacent first battery cell and second battery cell are connected by means of a conductive tape so as to realize series connection of the respective battery cells. The conductive tape comprises first low-temperature solder filaments and second low-temperature solder filaments which are parallel to one other and are arranged alternately. The first low-temperature solder filaments are vertically connected to first positive fine gate lines of the first battery cell and second negative fine gate lines of the second battery cell, and the second low-temperature solder filaments are vertically connected to first negative fine gate lines of the first battery cell and second positive fine gate lines of the second battery cell. In the IBC solar cell module, main gate lines of the battery cells are replaced with the low-temperature solder filaments, such that the consumption of silver paste can be reduced, thereby reducing the production and manufacturing costs of batteries. Moreover, such arrangement can shorten the current transmission distance, reduce the series resistance of the battery cells, and improve the efficiency of the cell module.

Description

IBC太阳能电池组件及其制作方法、IBC太阳能电池组串IBC solar cell module and manufacturing method thereof, IBC solar cell string 技术领域Technical field
本发明属于太阳能电池组件技术领域，具体涉及一种IBC太阳能电池串、IBC太阳能电池组件及其制作方法。The invention belongs to the technical field of solar cell components, and specifically relates to an IBC solar cell string, an IBC solar cell component and a manufacturing method thereof.
背景技术Background technique
能源危机下光伏产业发展迅速，进一步推广光伏应用的关键是提高太阳能电池片的光电转换效率，降低电池片的制作成本。The photovoltaic industry is developing rapidly under the energy crisis. The key to further promoting photovoltaic applications is to improve the photoelectric conversion efficiency of solar cells and reduce the production cost of cells.
与常规的晶硅太阳能电池不同，IBC(Interdigitated back contact，交叉背接触)太阳能电池的正极和负极均设计于电池背光面，正面无栅线遮挡，从而可以避免常规电池的正面栅线电极的遮挡造成的光学损失，提升了电池的短路电流及转化效率。Different from conventional crystalline silicon solar cells, the positive and negative electrodes of IBC (Interdigitated back contact) solar cells are designed on the backlight surface of the battery, and there is no grid line obstruction on the front side, thus avoiding the obstruction of the front grid electrode of conventional cells. The optical loss caused increases the short-circuit current and conversion efficiency of the battery.
传统IBC太阳能电池的电极主要由主栅线和副栅线构成，其中，副栅线用于收集电流，主栅线用于汇集副栅线收集的电流并通过与焊带焊接将电流导出。目前主栅线电极与副栅线电极一般采用丝网印刷导电银浆料制成，需要消耗大量的银浆，导致太阳能电池组件的成本较高。在低成本、高转化效率电池片这一目标的催促下，无主栅线电池片技术应运而生。无主栅线电池片，一般指的是在常规电池片基础上，去掉主栅线且保留细栅线；这种电池片因为不再需要设置主栅线，从而可以降低银浆的使用量。将所述无主栅线电池片技术应用到IBC电池上形成无主栅IBC电池，能大大减少银浆的使用，进而有效降低IBC电池的制作成本。The electrodes of traditional IBC solar cells are mainly composed of main grid lines and auxiliary grid lines. The auxiliary grid lines are used to collect current, and the main grid lines are used to collect the current collected by the auxiliary grid lines and export the current by welding with welding ribbons. Currently, main grid electrodes and auxiliary grid electrodes are generally made of screen-printed conductive silver paste, which requires a large amount of silver paste, resulting in high cost of solar cell modules. Driven by the goal of low-cost, high-conversion-efficiency cells, busbar-less cell technology emerged as the times require. Cells without main grid lines generally refer to conventional cells with the main grid lines removed and thin grid lines retained; this type of cell sheet can reduce the use of silver paste because it no longer requires main grid lines. Applying the busbar-less cell technology to IBC batteries to form busbar-less IBC batteries can greatly reduce the use of silver paste, thereby effectively reducing the production cost of IBC batteries.
与常规晶硅太阳能电池不同，IBC电池的发射区电极和基区电极均设计于电池背面，其在组件端的电池片焊接互联也均在电池背面进行，电池正背面受力不均，传统红外焊接温度较高，焊接后容易发生电池片翘曲，影响组件良率，也不利于电池薄片化发展。Different from conventional crystalline silicon solar cells, the emitter electrode and base electrode of IBC cells are designed on the back of the cell. The welding and interconnection of the cells on the component side are also performed on the back of the cell. The front and back of the cell are unevenly stressed. Traditional infrared welding The higher the temperature, the easier it is for the cells to warp after welding, which affects the component yield and is not conducive to the development of thin battery cells.
发明内容Contents of the invention
为了解决上述现有技术中存在的问题，本发明提供了一种IBC太阳能电池组件及其制作方法、IBC太阳能电池组串。 In order to solve the above-mentioned problems existing in the prior art, the present invention provides an IBC solar cell module, a manufacturing method thereof, and an IBC solar cell string.
根据本发明实施例的一方面提供的IBC太阳能电池组件，所述太阳能电池组件包括若干交替排布的第一电池片和第二电池片，所述第一电池片和所述第二电池片的正极细栅线和负极细栅线均匀分布于电池片的背面，并且所述正极细栅线和所述负极细栅线交替设置且互相平行；所述第一电池片和所述第二电池片均为无主栅IBC太阳能电池片；According to an IBC solar cell module provided by an aspect of an embodiment of the present invention, the solar cell module includes a plurality of alternately arranged first battery sheets and second battery sheets, and the first battery sheet and the second battery sheet are The positive electrode fine grid lines and the negative electrode fine grid lines are evenly distributed on the back of the battery sheet, and the positive electrode fine grid lines and the negative electrode fine grid lines are alternately arranged and parallel to each other; the first battery sheet and the second battery sheet All are IBC solar cells without main grid;
相邻的所述第一电池片与所述第二电池片的正负极细栅线通过导电带进行连接以实现各个电池片的串联，其中，所述导电带包括互相平行且交替设置的第一低温焊丝和第二低温焊丝，所述第一低温焊丝与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线垂直连接，所述第二低温焊丝与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线垂直连接。The positive and negative electrode thin grid lines of the adjacent first battery sheet and the second battery sheet are connected through conductive strips to achieve series connection of each battery sheet, wherein the conductive strips include parallel and alternately arranged third cells. A low-temperature welding wire and a second low-temperature welding wire. The first low-temperature welding wire is vertically connected to the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet. The second low temperature welding wire The low-temperature welding wire is vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet.
在上述实施例的一方面提供的IBC太阳能电池组件的一个示例中，所述导电带的第一低温焊丝和第二低温焊丝的数量相等，且所述第一低温焊丝和所述第二低温焊丝均沿着电池片的排布方向延伸，所述第一低温焊丝和所述第二低温焊丝沿着所述电池片的排布方向的垂直方向上交替分布。In an example of the IBC solar cell module provided by an aspect of the above embodiment, the number of first low-temperature welding wires and second low-temperature welding wires of the conductive strip is equal, and the first low-temperature welding wire and the second low-temperature welding wire Both extend along the arrangement direction of the battery sheets, and the first low-temperature welding wire and the second low-temperature welding wire are alternately distributed along the vertical direction of the arrangement direction of the battery sheets.
在上述实施例的一方面提供的IBC太阳能电池组件的一个示例中，所述第一电池片和所述第二电池片的正负极细栅线均沿着电池片的排布方向的垂直方向上延伸，且所述第一电池片和所述第二电池片的正极细栅线和负极细栅线沿着所述电池片的排布方向交错分布。In an example of the IBC solar cell module provided in one aspect of the above embodiment, the positive and negative thin grid lines of the first cell sheet and the second cell sheet are along the vertical direction of the arrangement direction of the cell sheets. extending upward, and the positive electrode fine grid lines and the negative electrode fine grid lines of the first battery sheet and the second battery sheet are staggered along the arrangement direction of the battery sheets.
在上述实施例的一方面提供的IBC太阳能电池组件的一个示例中，在所述第一电池片和所述第二电池片的正负极细栅线的预定区域上设置有锡膏焊点，其中，所述第一低温焊丝通过所述锡膏焊点与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线进行垂直连接；所述第二低温焊丝通过所述锡膏焊点与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线进行垂直连接。In an example of the IBC solar cell module provided in one aspect of the above embodiment, solder paste solder joints are provided on predetermined areas of the positive and negative electrode thin grid lines of the first cell sheet and the second cell sheet, Wherein, the first low-temperature welding wire is vertically connected to the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet through the solder paste solder joint; the third Two low-temperature welding wires are vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet through the solder paste solder joint.
在上述实施例的一方面提供的IBC太阳能电池组件的一个示例中，所述第一电池片和所述第二电池片的与所述预定区域之外的区域相对的正负极细栅线上涂覆有绝缘胶，其中，所述第一低温焊丝通过所述绝缘胶以避免与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线形成接触；所述第二低温焊丝通过所述绝缘胶以避免与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线形成接触。 In an example of the IBC solar cell module provided in an aspect of the above embodiment, the positive and negative electrode thin grid lines of the first cell sheet and the second cell sheet opposite to the area outside the predetermined area Coated with insulating glue, wherein the first low-temperature welding wire passes through the insulating glue to avoid formation with the first negative electrode fine grid line of the first battery sheet and the second positive electrode fine grid line of the second battery sheet Contact; the second low-temperature welding wire passes through the insulating glue to avoid contact with the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet.
在上述实施例的一方面提供的IBC太阳能电池组件的一个示例中，所述导电带还包括基底层和粘接层，其中，所述粘接层层叠于所述基底层上，所述第一低温焊丝和所述第二低温焊丝固定于所述粘结层上。In an example of the IBC solar cell module provided in an aspect of the above embodiment, the conductive tape further includes a base layer and an adhesive layer, wherein the adhesive layer is laminated on the base layer, and the first The low temperature welding wire and the second low temperature welding wire are fixed on the adhesive layer.
在上述实施例的一方面提供的IBC太阳能电池组件的一个示例中，所述无主栅IBC太阳能电池组件还包括前板玻璃、第一封装胶膜、第二封装胶膜和背板层，其中，所述第一封装胶膜覆盖所述第一电池片和所述第二电池片的电池正面；所述导电带覆盖所述第一电池片和所述第二电池片的电池背面；所述第二封装胶膜覆盖所述导电带；所述前板玻璃设置于所述第一封装胶膜上，所述背板层设置于所述第二封装胶膜上。In an example of the IBC solar cell module provided in one aspect of the above embodiment, the main grid-less IBC solar cell module further includes a front glass, a first encapsulating adhesive film, a second encapsulating adhesive film and a backsheet layer, wherein , the first encapsulating film covers the battery front side of the first battery sheet and the second battery sheet; the conductive tape covers the battery back side of the first battery sheet and the second battery sheet; The second encapsulation film covers the conductive tape; the front glass is disposed on the first encapsulation film, and the backplane layer is disposed on the second encapsulation film.
根据本发明实施例的另一方面提供的IBC太阳能电池组串，所述IBC太阳能电池组串包括上述的多个IBC太阳能电池组件，所述IBC太阳能电池组件之间并联连接。According to another aspect of an embodiment of the present invention, an IBC solar cell string is provided. The IBC solar cell string includes a plurality of the above-mentioned IBC solar cell modules, and the IBC solar cell modules are connected in parallel.
根据本发明实施例的又一方面提供的IBC太阳能电池组件的制作方法，所述制作方法包括：According to another aspect of the embodiment of the present invention, a method for manufacturing an IBC solar cell module is provided. The manufacturing method includes:
在粘接层上形成若干条相互平行且交替设置的第一低温焊丝和第二低温焊丝，形成导电带；Form several first low-temperature welding wires and second low-temperature welding wires that are parallel to each other and alternately arranged on the adhesive layer to form a conductive strip;
将若干第一电池片和第二电池片若干依次排布设置于导电带上，并进行热压，以将若干所述第一电池片和所述第二电池片与导电带进行粘接固定形成电池串；其中，所述第一低温焊丝与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线垂直连接，且使所述第二低温焊丝与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线垂直连接，实现各个电池片的串联；其中，所述第一电池片和所述第二电池片的正负极细栅线均沿着电池片的排布方向的垂直方向上延伸，且所述第一电池片和所述第二电池片的正极细栅线和负极细栅线沿着所述电池片的排布方向交错分布，所述第一电池片和所述第二电池片均为无主栅IBC太阳能电池片。Arrange a plurality of first battery sheets and a plurality of second battery sheets on the conductive tape in sequence, and perform hot pressing to bond and fix the plurality of first battery sheets and the second battery sheets to the conductive tape to form a Battery string; wherein the first low-temperature welding wire is vertically connected to the first positive electrode thin grid line of the first battery piece and the second negative electrode thin grid line of the second battery piece, and the second low-temperature welding wire Vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet to achieve series connection of each battery sheet; wherein, the first battery sheet and the second battery sheet The positive and negative electrode fine grid lines of the two battery sheets both extend in the vertical direction of the arrangement direction of the battery sheets, and the positive electrode fine grid lines and the negative electrode fine grid lines of the first battery sheet and the second battery sheet extend along The cells are staggered in the arrangement direction of the cells, and the first cells and the second cells are both main grid-less IBC solar cells.
在上述实施例的又一方面提供的IBC太阳能电池组件的制作方法的一个示例中，所述制作方法还包括：In an example of the method for manufacturing an IBC solar cell module provided in yet another aspect of the above embodiment, the manufacturing method further includes:
将所述电池串按照组件电路排版互联于第一封装胶膜上，电池片正面与第一封装胶膜接触，所述第一封装胶膜叠层于前板玻璃上，然后将第二封装胶膜和背板层依次叠层于所述电池串上，所述第二封装胶膜与所述导电带的基底层 接触，所述背板层与所述第二封装胶膜接触；The battery strings are interconnected on the first packaging film according to the component circuit layout, the front side of the battery sheet is in contact with the first packaging film, the first packaging film is laminated on the front glass, and then the second packaging film is The film and backplane layers are laminated on the battery string in sequence, and the second encapsulating adhesive film and the base layer of the conductive tape Contact, the backplane layer is in contact with the second packaging film;
将叠层好的结构进行层压形成一体化电池组件结构。The stacked structures are laminated to form an integrated battery module structure.
有益效果：本发明提供的IBC太阳能电池组件，通过利用导电带上的低温焊丝代替IBC电池片背面的主栅线，以实现IBC电池片之间的互联焊接以及电流汇集，从而可以去除常规IBC电池片中的主栅线，降低银浆的使用量，进而有利于降低IBC太阳能电池组件的生产制造成本。并且，通过在所述导电带上形成多条低温焊丝，有利于缩短电流的传输距离，降低电池片的串联电阻，进而有利于提高太阳能电池组件的效率；而且低温焊丝的数量越多，越有利于提高电池片的隐裂容忍度，从而有利于提高太阳能电池组件的性能。此外，本发明提供的IBC太阳能电池组件的制作方法通过采用层压低温焊接的方式以将IBC电池片与所述导电带粘接固定，有利于缓解常规的红外焊接方式导致的焊接应力不均带来的电池片翘曲，从而有利于降低电池片的碎片率，提升组件良率，并且可以采用更薄硅片，进一步降低电池组件成本。Beneficial effects: The IBC solar cell module provided by the present invention replaces the main grid wires on the back of the IBC cells by using low-temperature welding wire on the conductive tape to realize interconnection welding and current collection between the IBC cells, thereby eliminating the need for conventional IBC cells. The main grid lines in the chip reduce the usage of silver paste, which in turn helps reduce the manufacturing cost of IBC solar cell modules. Moreover, by forming multiple low-temperature welding wires on the conductive tape, it is beneficial to shorten the transmission distance of the current and reduce the series resistance of the cells, thereby improving the efficiency of the solar cell module; and the greater the number of low-temperature welding wires, the more It is conducive to improving the crack tolerance of cells, thereby conducive to improving the performance of solar cell modules. In addition, the manufacturing method of IBC solar cell modules provided by the present invention adopts laminated low-temperature welding to bond and fix the IBC cells to the conductive tape, which is beneficial to alleviating the uneven welding stress caused by conventional infrared welding. The resulting cells will be warped, which will help reduce the fragmentation rate of the cells and improve the module yield. Thinner silicon wafers can be used to further reduce the cost of battery components.
附图说明Description of drawings
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：The above and other aspects, features and advantages of embodiments of the invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
图1是根据本发明的实施例的IBC太阳能电池组件的结构示意图；Figure 1 is a schematic structural diagram of an IBC solar cell module according to an embodiment of the present invention;
图2是根据本发明的实施例的IBC太阳能电池组件的电池片的结构示意图；Figure 2 is a schematic structural diagram of a cell sheet of an IBC solar cell module according to an embodiment of the present invention;
图3是根据本发明的实施例的IBC太阳能电池组件的一种导电带的结构示意图；Figure 3 is a schematic structural diagram of a conductive strip of an IBC solar cell module according to an embodiment of the present invention;
图4是根据本发明的实施例的IBC太阳能电池组件的另一种导电带的正视图；Figure 4 is a front view of another conductive strip of an IBC solar cell module according to an embodiment of the present invention;
图5是根据本发明的实施例的IBC太阳能电池组件的电池片的排布安装的实施方式的示意图；Figure 5 is a schematic diagram of an arrangement and installation of cells of an IBC solar cell module according to an embodiment of the present invention;
图6是根据本发明的实施例的IBC太阳能电池组串的电池片的排布安装的另一实施方式的示意图；Figure 6 is a schematic diagram of another embodiment of the arrangement and installation of cells in an IBC solar cell string according to an embodiment of the present invention;
图7是根据本发明的实施例的IBC太阳能电池组件的制作方法的流程图。FIG. 7 is a flow chart of a method of manufacturing an IBC solar cell module according to an embodiment of the present invention.
具体实施方式 Detailed ways
以下，将参照附图来详细描述本发明的具体实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, these embodiments are provided in order to explain the principles of the invention and its practical application, thereby enabling others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to the particular use contemplated.
如本文中使用的，术语“包括”及其变型表示开放的术语，含义是“包括但不限于”。术语“基于”、“根据”等表示“至少部分地基于”、“至少部分地根据”。术语“一个实施例”和“一实施例”表示“至少一个实施例”。术语“另一个实施例”表示“至少一个其他实施例”。术语“第一”、“第二”等可以指代不同的或相同的对象。下面可以包括其他的定义，无论是明确的还是隐含的。除非上下文中明确地指明，否则一个术语的定义在整个说明书中是一致的。As used herein, the term "includes" and variations thereof represent an open term meaning "including, but not limited to." The terms "based on", "according to", etc. mean "based at least in part on", "based at least in part on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment." The term "another embodiment" means "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same object. Other definitions may be included below, whether explicit or implicit. The definition of a term is consistent throughout this specification unless the context clearly dictates otherwise.
如背景技术中所述，目前对于正极和负极均处于电池背面的无主栅IBC电池，其电池片之间焊接互联形成电池组件均在电池背面进行，易导致电池正背面受力不均，焊接后容易发生电池片翘曲，影响组件良率，也不利于电池薄片化发展。此外，无主栅IBC电池的正负极互联属于同侧互联，常规的线膜复合方式无法满足要求。因此，为了解决现有技术中有关无主栅IBC电池片焊接互联形成的无主栅IBC电池组件存在的诸多技术问题，根据本发明的实施例提供了一种IBC太阳能电池组件及其制作方法、IBC太阳能电池组串。As mentioned in the background art, currently, for the main grid-less IBC battery in which the positive and negative electrodes are both on the back of the battery, the welding and interconnection between the battery sheets to form the battery components are all done on the back of the battery, which can easily lead to uneven stress on the front and back of the battery. In the end, cell warping is prone to occur, which affects component yield and is not conducive to the development of thin battery cells. In addition, the positive and negative electrode interconnections of the busbarless IBC battery belong to the same side interconnection, and the conventional wire film composite method cannot meet the requirements. Therefore, in order to solve many technical problems in the prior art related to the busbarless IBC battery module formed by welding and interconnecting the busbarless IBC cells, an IBC solar cell module and a manufacturing method thereof are provided according to embodiments of the present invention. IBC solar array string.
以下将结合附图来详细描述根据本发明的实施例的IBC太阳能电池组件及其制作方法、IBC太阳能电池组串。The IBC solar cell module, its manufacturing method, and the IBC solar cell string according to embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
图1是根据本发明的实施例的IBC太阳能电池组件的结构示意图，参照图1。所述IBC太阳能电池组件包括：前板玻璃10、第一封装胶膜20、多个电池片30、导电带40、第二封装胶膜50和背板层60。第一封装胶膜和第二封装胶膜为EVA或POE或EVA与POE共挤形成的共挤POE，背板层为玻璃背板或透明背板或白色背板或黑色背板或内黑外白背板。FIG. 1 is a schematic structural diagram of an IBC solar cell module according to an embodiment of the present invention. Refer to FIG. 1 . The IBC solar cell module includes: a front glass 10 , a first encapsulating film 20 , a plurality of cells 30 , a conductive tape 40 , a second encapsulating film 50 and a backsheet layer 60 . The first encapsulation adhesive film and the second encapsulation adhesive film are EVA or POE or co-extruded POE formed by co-extrusion of EVA and POE. The backplane layer is a glass backplane or a transparent backplane or a white backplane or a black backplane or black inside and outside. White back panel.
在本实施例中，所述多个电池片30包括若干交替排布的第一电池片和第二电池片。其中，所述第一电池片和所述第二电池片可以采取整片或分片的形式进行交替排布。In this embodiment, the plurality of battery sheets 30 include a plurality of first battery sheets and second battery sheets that are alternately arranged. Wherein, the first battery sheets and the second battery sheets may be alternately arranged in the form of whole sheets or slices.
所述多个电池片30之间的片间距根据需要采用小间距或负间距进行排布。通过采取小间距或负间距的电池片排布设计，有利于进一步提高太阳能电池组件的效率。 The cell spacing between the plurality of battery cells 30 is arranged using a small spacing or a negative spacing as required. By adopting a cell arrangement design with small or negative spacing, it is helpful to further improve the efficiency of solar cell modules.
进一步地，所述第一封装胶膜20覆盖所述第一电池片和所述第二电池片的电池正面；所述导电带40覆盖所述第一电池片和所述第二电池片的电池背面；所述第二封装胶膜50覆盖所述导电带40；所述前板玻璃10设置于所述第一封装胶膜20上，所述背板层60设置于所述第二封装胶膜50上。Further, the first encapsulating film 20 covers the battery fronts of the first battery sheet and the second battery sheet; the conductive tape 40 covers the battery surfaces of the first battery sheet and the second battery sheet. Back side; the second encapsulation film 50 covers the conductive tape 40; the front glass 10 is disposed on the first encapsulation film 20, and the backplane layer 60 is disposed on the second encapsulation film 50 on.
图2是根据本发明的实施例的IBC太阳能电池组件的电池片的结构示意图，参照图2。FIG. 2 is a schematic structural diagram of a cell sheet of an IBC solar cell module according to an embodiment of the present invention. Refer to FIG. 2 .
其中，所述电池片30可以为第一电池片或第二电池片。所述第一电池片和所述第二电池片均为无主栅IBC太阳能电池片。所述电池片30的背面设有均匀分布且互相平行的细栅线31，所述细栅线31包括正极细栅线和负极细栅线。The battery sheet 30 may be a first battery sheet or a second battery sheet. The first cell sheet and the second cell sheet are both busbarless IBC solar cells. The back side of the battery sheet 30 is provided with fine grid lines 31 that are evenly distributed and parallel to each other. The fine grid lines 31 include positive electrode fine grid lines and negative electrode fine grid lines.
进一步地，所述第一电池片的第一正极栅线和第一负极栅线均匀分布于所述第一电池片的背面；所述第二电池片的第二正极栅线和第二负极栅线均匀分布于所述第二电池片的背面。所述第一电池片和所述第二电池片的正负极细栅线互相平行且交替设置。Further, the first positive grid line and the first negative grid line of the first battery sheet are evenly distributed on the back side of the first battery sheet; the second positive grid line and the second negative electrode grid of the second battery sheet are The lines are evenly distributed on the back side of the second battery sheet. The positive and negative electrode thin grid lines of the first battery sheet and the second battery sheet are parallel to each other and arranged alternately.
进一步地，所述第一电池片和所述第二电池片的正负极细栅线均沿着所述电池片30的排布方向的垂直方向上延伸，且所述第一电池片和所述第二电池片的正极细栅线和负极细栅线沿着所述电池片30的排布方向交替分布。Further, the positive and negative electrode thin grid lines of the first battery sheet and the second battery sheet both extend in the vertical direction along the arrangement direction of the battery sheets 30 , and the first battery sheet and the second battery sheet The positive electrode fine grid lines and the negative electrode fine grid lines of the second battery sheet are alternately distributed along the arrangement direction of the battery sheets 30 .
图3是根据本发明的实施例的IBC太阳能电池组件的一种导电带的结构示意图。Figure 3 is a schematic structural diagram of a conductive strip of an IBC solar cell module according to an embodiment of the present invention.
如图3所示，所示导电带40包括低温焊丝41、粘结层42和基底层43。As shown in FIG. 3 , the conductive tape 40 includes a low-temperature welding wire 41 , an adhesive layer 42 and a base layer 43 .
在本实施例中，所述低温焊丝40包括第一低温焊丝和第二低温焊丝，所述第一低温焊丝和所述第二低温焊丝互相平行且交替设置。In this embodiment, the low-temperature welding wire 40 includes a first low-temperature welding wire and a second low-temperature welding wire, and the first low-temperature welding wire and the second low-temperature welding wire are arranged parallel to each other and alternately.
具体地，所述第一低温焊丝和所述第二低温焊丝的数量相等，并且所述第一低温焊丝和所述第二低温焊丝的数量N＞9。所述第一低温焊丝和所述第二低温焊丝均沿着所述电池片30的排布方向延伸。所述第一低温焊丝和所述第二低温焊丝沿着所述电池片30的排布方向的垂直方向上交替分布。Specifically, the number of the first low-temperature welding wire and the second low-temperature welding wire is equal, and the number of the first low-temperature welding wire and the second low-temperature welding wire is N>9. The first low-temperature welding wire and the second low-temperature welding wire both extend along the arrangement direction of the battery sheets 30 . The first low-temperature welding wire and the second low-temperature welding wire are alternately distributed along the vertical direction of the arrangement direction of the battery sheets 30 .
在本实施例中，所述粘接层42层叠于所述基底层43上，所述低温焊丝41设置于所述粘接层42上。In this embodiment, the adhesive layer 42 is laminated on the base layer 43 , and the low-temperature welding wire 41 is disposed on the adhesive layer 42 .
在一个示例中，所述粘接层42为聚烯烃类材料，所述粘接层42的熔点为70℃～120℃，厚度为75μm～200μm。 In one example, the adhesive layer 42 is made of polyolefin material, the melting point of the adhesive layer 42 is 70°C to 120°C, and the thickness is 75 μm to 200 μm.
所述粘接层42的最大流动性低于所述第一封装胶膜20和所述第二封装胶膜50。所述粘接层42的两面均具有粘性，使其可以一面与低温焊丝粘结，另一面与所述基底层43粘结。The maximum fluidity of the adhesive layer 42 is lower than that of the first encapsulating adhesive film 20 and the second encapsulating adhesive film 50 . Both sides of the adhesive layer 42 have viscosity, so that one side can be bonded to the low-temperature welding wire and the other side can be bonded to the base layer 43 .
在一个示例中，所述基底层43的厚度为12μm～25μm，熔点大于150℃。基底层43为聚烯烃类胶膜，所述基底层中添加有阻水分子材料。In one example, the thickness of the base layer 43 is 12 μm to 25 μm, and the melting point is greater than 150°C. The base layer 43 is a polyolefin adhesive film, and a water-blocking molecular material is added to the base layer.
所述基底层43在层压温度下无流动性，从而可以保证所述低温焊丝41在层压过程中不会发生扭曲和偏移，并同时防止所述第二封装胶膜50在层压过程中流入所述低温焊丝41与电池片30之间造成电池片30与所述低温焊丝41之间绝缘而带来的串联电阻偏大问题和焊带偏移带来的短路问题，具有阻水作用，防止水汽进入电池片，提升太阳能电池组件的耐老化性能。The base layer 43 has no fluidity at the lamination temperature, thereby ensuring that the low-temperature welding wire 41 will not be twisted or deflected during the lamination process, and at the same time preventing the second encapsulating adhesive film 50 from being distorted during the lamination process. The medium flows between the low-temperature welding wire 41 and the battery piece 30, causing the insulation between the battery piece 30 and the low-temperature welding wire 41 to cause the problem of excessive series resistance and the short-circuit problem caused by the offset of the welding strip, which has a water-blocking effect. , prevent water vapor from entering the cells and improve the aging resistance of solar cell modules.
进一步地，所述低温焊丝41的镀层选自熔点为110℃～145℃的锡铋银合金或锡铋合金。所述低温焊丝41的截面为圆形或矩形。当截面为圆形时，圆形截面的直径为0.15mm～0.3mm。当截面为矩形时，所述低温焊丝41的厚度为0.12mm～0.25mm，宽度为0.4mm～0.6mm。Further, the coating of the low-temperature welding wire 41 is selected from tin-bismuth-silver alloy or tin-bismuth alloy with a melting point of 110°C to 145°C. The cross section of the low temperature welding wire 41 is circular or rectangular. When the cross section is circular, the diameter of the circular cross section is 0.15mm~0.3mm. When the cross section is rectangular, the thickness of the low-temperature welding wire 41 is 0.12 mm to 0.25 mm, and the width is 0.4 mm to 0.6 mm.
在本实施例中，所述第一低温焊丝与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线垂直连接，所述第二低温焊丝与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线垂直连接。In this embodiment, the first low-temperature welding wire is vertically connected to the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet, and the second low-temperature welding wire is connected to The first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet are vertically connected.
因此，通过所述导电带40上的所述低温焊丝40，可以使所述第一电池片的第一正极细栅线与相邻的所述第二电池片的第二负极细栅线进行连接，或使所述第一电池片的第一负极细栅线与相邻的所述第二电池片的第二正极细栅线进行连接，从而使相邻的两个电池片30上极性相反的正负极细栅线依次进行电性连接，实现各个电池片30的串联。Therefore, through the low-temperature welding wire 40 on the conductive strip 40, the first positive electrode thin grid line of the first battery piece can be connected to the second negative electrode thin grid line of the adjacent second battery piece. , or connect the first negative electrode thin grid line of the first battery piece to the second positive electrode thin grid line of the adjacent second battery piece, so that the polarities on the two adjacent battery pieces 30 are opposite. The positive and negative electrode thin grid lines are electrically connected in sequence to realize the series connection of each battery piece 30.
通过利用所述导电带40上的低温焊丝41代替IBC电池片背面的主栅线，以实现电池片30之间的互联焊接以及电流汇集，从而可以去除常规的IBC电池片中的主栅线，进而可以降低65％以上的银浆使用量。By using the low-temperature welding wire 41 on the conductive tape 40 to replace the main grid lines on the back of the IBC cells, interconnection welding and current collection between the cells 30 can be achieved, thereby eliminating the main grid lines in conventional IBC cells. Furthermore, the usage amount of silver paste can be reduced by more than 65%.
此外，通过在所述导电带40上形成多条所述低温焊丝41，有利于缩短电流的传输距离，降低电池片30的串联电阻，进而有利于提高太阳能电池组件的效率；此外，所述低温焊丝41的数量越多，越有利于提高电池片30的隐裂容忍度，从而提高太阳能电池组件的性能。In addition, by forming a plurality of the low-temperature welding wires 41 on the conductive tape 40, it is beneficial to shorten the transmission distance of the current and reduce the series resistance of the cell 30, which is beneficial to improving the efficiency of the solar cell module; in addition, the low-temperature The greater the number of welding wires 41, the more conducive to improving the crack tolerance of the cell sheet 30, thereby improving the performance of the solar cell module.
继续参照图2，在所述电池片30的所述细栅线31的预定区域上设置有锡膏 焊点32，其中，所述第一低温焊丝通过所述锡膏焊点32与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线进行垂直连接；所述第二低温焊丝通过所述锡膏焊点32与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线进行垂直连接。Continuing to refer to FIG. 2 , solder paste is provided on a predetermined area of the fine grid lines 31 of the battery piece 30 . solder joint 32, wherein the first low-temperature solder wire passes through the solder paste solder joint 32 and is perpendicular to the first positive electrode fine grid line of the first battery sheet and the second negative electrode fine grid line of the second battery sheet. Connection; the second low-temperature solder wire is vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet through the solder paste solder joint 32.
其中，所述锡膏焊点32的高度为20μm～100μm。Wherein, the height of the solder paste solder joint 32 is 20 μm to 100 μm.
继续参照图2，所述电池片30的与所述预定区域之外的区域相对的所述细栅线31上涂覆有绝缘胶33，其中，所述第一低温焊丝通过所述绝缘胶33以避免与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线形成接触；所述第二低温焊丝通过所述绝缘胶33以避免与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线形成接触。Continuing to refer to FIG. 2 , the thin grid lines 31 of the battery sheet 30 opposite to the area outside the predetermined area are coated with insulating glue 33 , wherein the first low-temperature welding wire passes through the insulating glue 33 To avoid contact with the first negative electrode fine grid line of the first cell sheet and the second positive electrode fine grid line of the second cell sheet; the second low-temperature welding wire passes through the insulating glue 33 to avoid contact with the The first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet form contact.
由于所述第一电池片和所述第二电池片的正极细栅线和负极细栅线沿着所述电池片30的排布方向交替分布，因此通过利用所述绝缘胶33，可以避免同一条低温焊丝41与同一电池片30的不同极性的细栅线31均形成接触，导致电池短路。Since the positive electrode fine grid lines and the negative electrode fine grid lines of the first battery sheet and the second battery sheet are alternately distributed along the arrangement direction of the battery sheet 30, by using the insulating glue 33, it is possible to avoid the same problem. A low-temperature welding wire 41 comes into contact with the thin grid lines 31 of different polarities of the same battery piece 30, causing a short circuit in the battery.
通过利用所述绝缘胶33，可在所述细栅线31的延伸方向的垂直方向上形成多组两两相邻且电极极性相反的正负极，其中，将每组正负极中的正极(或负极)利用MARK点M进行标记。By using the insulating glue 33, multiple groups of adjacent positive and negative electrodes with opposite electrode polarities can be formed in the vertical direction of the extension direction of the thin gate line 31, wherein the positive and negative electrodes in each group are The positive pole (or negative pole) is marked with MARK point M.
继续参照图2，沿着所述电池片30的排布方向，所述电池片30或所述电池片30的分片的边缘两端还设置有垂直于所述细栅线31的第一细栅线34。所述第一细栅线34位于所述细栅线31和所述锡膏焊点32，和/或所述绝缘胶33之间。所述第一细栅线34的长度≤10mm。Continuing to refer to FIG. 2 , along the arrangement direction of the battery sheets 30 , first thin lines perpendicular to the thin grid lines 31 are provided at both ends of the edges of the battery sheets 30 or segments of the battery sheets 30 . Grid 34. The first thin grid line 34 is located between the thin grid line 31 and the solder paste solder joint 32 , and/or the insulating glue 33 . The length of the first thin grid line 34 is ≤10 mm.
图4是根据本发明的实施例的IBC太阳能电池组件的另一种导电带的正视图。参照图4，所述导电带40还包括规律性排布的若干孔洞44，所述孔洞44贯穿所述低温焊丝41。4 is a front view of another conductive strip of an IBC solar cell module according to an embodiment of the present invention. Referring to FIG. 4 , the conductive tape 40 further includes a plurality of regularly arranged holes 44 , and the holes 44 penetrate the low-temperature welding wire 41 .
当同一低温焊丝41将所述第一电池片和相邻的所述第二电池片上极性相反的正负极细栅线依次进行电性连接时，通过形成所述孔洞44，可以避免一组所述第一电池片和所述第二电池片与相邻的另一组所述第一电池片和所述第二电池片之间造成短路。When the same low-temperature welding wire 41 electrically connects the positive and negative electrode thin grid lines with opposite polarities on the first battery sheet and the adjacent second battery sheet in sequence, by forming the holes 44, a group of A short circuit is caused between the first battery sheet and the second battery sheet and another adjacent group of the first battery sheet and the second battery sheet.
所述孔洞44可以为圆形或矩形。The hole 44 may be circular or rectangular.
图5是根据本发明的实施例的IBC太阳能电池组件的电池片的排布安装的 实施方式的的示意图。其中，为了能够简化说明所述IBC太阳能电池组件中的电池片的排布安装方式，图5中省略了所述IBC太阳能电池组件中的前板玻璃10、第一封装胶膜20、第二封装胶膜50和背板层60，仅标示出所述IBC太阳能电池组件中的电池片30和导电带40。Figure 5 is an arrangement and installation of cells of an IBC solar cell module according to an embodiment of the present invention. Schematic diagram of the embodiment. In order to simplify the explanation of the arrangement and installation of the cells in the IBC solar cell module, the front glass 10, the first encapsulating film 20 and the second encapsulating film in the IBC solar cell module are omitted in Figure 5. The adhesive film 50 and the backsheet layer 60 only indicate the cells 30 and conductive strips 40 in the IBC solar cell module.
如图5所示，相邻的所述电池片30通过所述导电带40进行连接以实现各个电池片30的串联。As shown in FIG. 5 , adjacent battery sheets 30 are connected through the conductive strips 40 to realize series connection of each battery sheet 30 .
根据本发明的实施例的另一方面提供了IBC太阳能电池组串，所述IBC太阳能电池组串包括上述的多个IBC太阳能电池组件，所述IBC太阳能电池组件之间并联连接。According to another aspect of the embodiment of the present invention, an IBC solar cell string is provided. The IBC solar cell string includes a plurality of the above-mentioned IBC solar cell modules, and the IBC solar cell modules are connected in parallel.
其中，所述IBC太阳能电池组串中还包括了汇流带70，通过所述汇流带70，从而将所述IBC太阳能电池组件进行并联连接，以获得所述IBC太阳能电池组串。Wherein, the IBC solar cell string also includes a bus belt 70, through the bus belt 70, the IBC solar cell components are connected in parallel to obtain the IBC solar cell string.
图6是根据本发明的实施例的IBC太阳能电池组串的电池片的排布安装的实施方式的的示意图。其中，图6中省略了所述IBC太阳能电池组串中的所述IBC太阳能电池组件的前板玻璃10、第一封装胶膜20、第二封装胶膜50和背板层60，仅标示出所述IBC太阳能电池组串中的电池片30、导电带40和汇流带70。FIG. 6 is a schematic diagram of an arrangement and installation of cells of an IBC solar cell string according to an embodiment of the present invention. Among them, the front glass 10, the first encapsulating film 20, the second encapsulating film 50 and the backsheet layer 60 of the IBC solar cell module in the IBC solar cell string are omitted in Figure 6, and only the The cells 30, conductive strips 40 and bus strips 70 in the IBC solar cell string.
如图6所示，所述IBC太阳能电池组件中相邻的所述电池片30通过所述导电带40进行连接以实现各个电池片30的串联，所述IBC太阳能电池组件之间通过所述汇流带70进行并联连接。As shown in FIG. 6 , the adjacent battery pieces 30 in the IBC solar cell module are connected through the conductive strip 40 to realize the series connection of each cell piece 30 , and the IBC solar cell modules are connected through the busbar. Take 70 for parallel connection.
根据本发明的实施例的又一方面提供了IBC太阳能电池组件的制作方法。图7是根据本发明的实施例的IBC太阳能电池组件的制作方法的流程图。参照图7，所述制作方法包括步骤S610、步骤S620、步骤S630和步骤S620。According to yet another aspect of embodiments of the present invention, a method for manufacturing an IBC solar cell module is provided. FIG. 7 is a flow chart of a method of manufacturing an IBC solar cell module according to an embodiment of the present invention. Referring to Figure 7, the manufacturing method includes step S610, step S620, step S630 and step S620.
在步骤S610中，在粘接层42上形成若干条相互平行且交替设置的第一低温焊丝和第二低温焊丝，形成导电带40。In step S610 , several first low-temperature welding wires and second low-temperature welding wires that are parallel to each other and alternately arranged are formed on the adhesive layer 42 to form the conductive strip 40 .
具体地，首先将若干所述第一低温焊丝和所述第二低温焊丝等间距平行定位并依次交替置于所述粘结层42上，然后通过热压方式将所述第一低温焊丝和所述第二低温焊丝与所述粘结层42及基底层43进行热压合，以形成所述导电带40。Specifically, first, a plurality of the first low-temperature welding wires and the second low-temperature welding wires are positioned parallel to each other at equal intervals and alternately placed on the adhesive layer 42 , and then the first low-temperature welding wires and the second low-temperature welding wires are pressed together by hot pressing. The second low-temperature welding wire is thermally pressed with the adhesive layer 42 and the base layer 43 to form the conductive strip 40 .
在本实施例中，在层叠于基底层43的粘结层42上形成若干条互相平行且 交替设置的第一低温焊丝和第二低温焊丝之后，所述制作方法还包括：In this embodiment, several parallel strips are formed on the adhesive layer 42 laminated on the base layer 43. After alternately setting the first low-temperature welding wire and the second low-temperature welding wire, the manufacturing method further includes:
对所述导电带40进行冲孔，以形成贯穿所述第一低温焊丝，和/或所述第二低温焊丝的孔洞44。The conductive strip 40 is punched to form a hole 44 penetrating the first low temperature welding wire and/or the second low temperature welding wire.
在步骤S620中，将若干第一电池片和第二电池片若干依次排布设置于导电带40上，并进行热压(热压温度120～250℃，时间5～15s)，以将若干所述第一电池片和所述第二电池片与导电带进行粘接固定形成电池串；其中，所述第一低温焊丝与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线垂直连接，且使所述第二低温焊丝与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线垂直连接，实现各个电池片30的串联。In step S620, a plurality of first battery sheets and a number of second battery sheets are arranged sequentially on the conductive tape 40, and hot pressing is performed (hot pressing temperature: 120-250°C, time: 5-15 seconds), so as to convert the plurality of first battery sheets and second battery sheets on the conductive tape 40. The first battery sheet and the second battery sheet are bonded and fixed with the conductive tape to form a battery string; wherein the first low-temperature welding wire and the first positive electrode thin grid line of the first battery sheet and the second The second negative electrode thin grid line of the battery sheet is vertically connected, and the second low-temperature welding wire is vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode fine grid line of the second battery sheet. , realizing the series connection of each battery piece 30.
在本实施例中，在将若干第一电池片和第二电池片依次排布设置于所述导电带40上之前，所述制作方法还包括：In this embodiment, before arranging a plurality of first battery sheets and second battery sheets on the conductive tape 40 in sequence, the manufacturing method further includes:
在所述电池片30的细栅线31的预定区域上形成锡膏焊点32，且在所述电池片30的与所述预定区域之外的区域相对的所述细栅线31上涂覆绝缘胶33。Solder paste solder joints 32 are formed on predetermined areas of the fine grid lines 31 of the battery sheet 30 , and are coated on the thin grid lines 31 of the battery sheet 30 opposite to areas outside the predetermined area. Insulating glue 33.
其中，所述第一低温焊丝通过所述锡膏焊点32与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线进行垂直连接；所述第二低温焊丝通过所述锡膏焊点32与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线进行垂直连接。Wherein, the first low-temperature solder wire is vertically connected to the first positive electrode fine grid line of the first cell sheet and the second negative electrode fine grid line of the second cell sheet through the solder paste solder joint 32; The second low-temperature solder wire is vertically connected to the first negative electrode thin grid line of the first cell sheet and the second positive electrode thin grid line of the second cell sheet through the solder paste solder joint 32 .
具体地，将所述导电带40铺设固定，将所述第一电池片和所述第二电池片依次交替排布放置于所述导电带40上，并使电池片30的电池背面与所述导电带40接触，其中，电池片30的电池背面的锡膏焊点32与所述第一低温焊丝，和/或所述第二低温焊丝一一对应，然后通过加热板对所述电池片30进行热压，以将所述电池片30与所述导电带40粘接固定。Specifically, the conductive tape 40 is laid and fixed, the first battery sheets and the second battery sheets are alternately arranged and placed on the conductive tape 40 , and the battery back side of the battery sheet 30 is aligned with the battery sheet 30 . The conductive tape 40 is in contact, wherein the solder paste solder joints 32 on the back of the battery sheet 30 correspond to the first low-temperature welding wire and/or the second low-temperature welding wire, and then the battery sheet 30 is heated through a heating plate. Hot pressing is performed to bond and fix the battery sheet 30 and the conductive tape 40 .
通过采用层压低温焊接的方式以将电池片30与所述导电带40粘接固定，有利于缓解常规的红外焊接方式导致的焊接应力不均带来的电池片翘曲，从而有利于降低电池片的碎片率，提升组件良率，并且还有利于电池片的薄片化发展。By using laminated low-temperature welding to adhere and fix the battery piece 30 to the conductive tape 40, it is helpful to alleviate the warping of the battery piece caused by uneven welding stress caused by conventional infrared welding methods, thereby helping to reduce the battery life. It reduces the chip fragmentation rate, improves component yield, and is also conducive to the development of thinner battery cells.
在步骤S630中，将电池串按照组件电路排版互联于第一封装胶膜20上，电池片正面与第一封装胶膜20接触，第一封装胶膜叠层于前板玻璃10上，然后将第二封装胶膜50和背板层60依次叠层于电池串上，第二封装胶膜与导电带40的基底层43接触，背板层与第二封装胶膜50接触。 In step S630, the battery strings are interconnected on the first packaging film 20 according to the component circuit layout, the front side of the battery piece is in contact with the first packaging film 20, the first packaging film is laminated on the front glass 10, and then the The second encapsulating adhesive film 50 and the backplane layer 60 are laminated on the battery string in sequence. The second encapsulating adhesive film is in contact with the base layer 43 of the conductive tape 40 , and the backplane layer is in contact with the second encapsulating adhesive film 50 .
在步骤S640中，将叠层好的结构进行层压形成一体化电池组件结构，层压温度为135℃～150℃。In step S640, the stacked structures are laminated to form an integrated battery module structure, and the lamination temperature is 135°C to 150°C.
在形成所述一体化电池结构之后，对所述一体化电池结构进行EL检测，主要检测电池的裂片、短路等缺陷。After the integrated battery structure is formed, EL testing is performed on the integrated battery structure to mainly detect defects such as battery splinters and short circuits.
综上所述，本发明提供的IBC太阳能电池组件，通过利用导电带上的低温焊丝代替IBC电池片背面的主栅线，以实现IBC电池片之间的互联焊接以及电流汇集，从而可以去除常规IBC电池片中的主栅线，降低银浆的使用量，进而有利于降低IBC太阳能电池组件的生产制造成本。并且，通过在所述导电带上形成多条低温焊丝，有利于缩短电流的传输距离，降低电池片的串联电阻，进而有利于提高太阳能电池组件的效率；而且低温焊丝的数量越多，越有利于提高电池片的隐裂容忍度，从而有利于提高太阳能电池组件的性能。In summary, the IBC solar cell module provided by the present invention uses low-temperature welding wire on the conductive strip to replace the main grid wires on the back of the IBC cells to realize interconnection welding and current collection between the IBC cells, thereby eliminating the need for conventional The main grid lines in IBC cells reduce the usage of silver paste, which in turn helps reduce the manufacturing cost of IBC solar cell modules. Moreover, by forming multiple low-temperature welding wires on the conductive tape, it is beneficial to shorten the transmission distance of the current and reduce the series resistance of the cells, thereby improving the efficiency of the solar cell module; and the greater the number of low-temperature welding wires, the more It is conducive to improving the crack tolerance of cells, thereby conducive to improving the performance of solar cell modules.
此外，本发明提供的IBC太阳能电池组件的制作方法通过采用层压低温焊接的方式以将IBC电池片与所述导电带粘接固定，有利于缓解常规的红外焊接方式导致的焊接应力不均带来的电池片翘曲，从而有利于降低电池片的碎片率，提升组件良率，并且可以采用更薄硅片，进一步降低电池组件成本。In addition, the manufacturing method of IBC solar cell modules provided by the present invention adopts laminated low-temperature welding to bond and fix the IBC cells to the conductive tape, which is beneficial to alleviating the uneven welding stress caused by conventional infrared welding. The resulting cells will be warped, which will help reduce the fragmentation rate of the cells and improve the module yield. Thinner silicon wafers can be used to further reduce the cost of battery components.
上述对本发明的特定实施例进行了描述。其它实施例在所附权利要求书的范围内。The foregoing describes specific embodiments of the invention. Other embodiments are within the scope of the appended claims.
在整个本说明书中使用的术语“示例性”、“示例”等意味着“用作示例、实例或例示”，并不意味着比其它实施例“优选”或“具有优势”。出于提供对所描述技术的理解的目的，具体实施方式包括具体细节。然而，可以在没有这些具体细节的情况下实施这些技术。在一些实例中，为了避免对所描述的实施例的概念造成难以理解，公知的结构和装置以框图形式示出。The terms "exemplary," "example," and the like used throughout this specification mean "serving as an example, instance, or illustration" and do not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, these techniques can be implemented without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described embodiments.
以上结合附图详细描述了本发明的实施例的可选实施方式，但是，本发明的实施例并不限于上述实施方式中的具体细节，在本发明的实施例的技术构思范围内，可以对本发明的实施例的技术方案进行多种简单变型，这些简单变型均属于本发明的实施例的保护范围。The optional implementations of the embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above-mentioned implementations. Within the scope of the technical concept of the embodiments of the present invention, the present invention can be modified. The technical solutions of the embodiments of the invention are subject to various simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the invention.
本说明书内容的上述描述被提供来使得本领域任何普通技术人员能够实现或者使用本说明书内容。对于本领域普通技术人员来说，对本说明书内容进行的各种修改是显而易见的，并且，也可以在不脱离本说明书内容的保护范围的情况下，将本文所定义的一般性原理应用于其它变型。因此，本说明书内容并 不限于本文所描述的示例和设计，而是与符合本文公开的原理和新颖性特征的最广范围相一致。 The above description of the content of this specification is provided to enable any person of ordinary skill in the art to make or use the content of this specification. Various modifications to the contents of this specification will be obvious to those of ordinary skill in the art, and the general principles defined herein may also be applied to other variations without departing from the scope of the contents of this specification. . Therefore, the contents of this manual do not There is no intention to be limited to the examples and designs described herein but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

  1. 一种IBC太阳能电池组件，其特征在于，所述太阳能电池组件包括若干交替排布的第一电池片和第二电池片，所述第一电池片和所述第二电池片的正极细栅线和负极细栅线均匀分布于电池片的背面，并且所述正极细栅线和所述负极细栅线交替设置且互相平行；所述第一电池片和所述第二电池片均为无主栅IBC太阳能电池片；An IBC solar cell module, characterized in that the solar cell module includes a plurality of first cells and second cells arranged alternately, and the positive electrode thin grid lines of the first cells and the second cells are and negative electrode fine grid lines are evenly distributed on the back of the battery sheet, and the positive electrode fine grid lines and the negative electrode fine grid lines are alternately arranged and parallel to each other; the first battery sheet and the second battery sheet are both mainless Grid IBC solar cells;
    相邻的所述第一电池片与所述第二电池片的正负极细栅线通过导电带进行连接以实现各个电池片的串联，其中，所述导电带包括互相平行且交替设置的第一低温焊丝和第二低温焊丝，所述第一低温焊丝与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线垂直连接，所述第二低温焊丝与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线垂直连接。The positive and negative electrode thin grid lines of the adjacent first battery sheet and the second battery sheet are connected through conductive strips to achieve series connection of each battery sheet, wherein the conductive strips include parallel and alternately arranged third cells. A low-temperature welding wire and a second low-temperature welding wire. The first low-temperature welding wire is vertically connected to the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet. The second low temperature welding wire The low-temperature welding wire is vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet.
  2. 根据权利要求1所述的IBC太阳能电池组件，其特征在于，所述导电带的第一低温焊丝和第二低温焊丝的数量相等，且所述第一低温焊丝和所述第二低温焊丝均沿着电池片的排布方向延伸，所述第一低温焊丝和所述第二低温焊丝沿着所述电池片的排布方向的垂直方向上交替分布。The IBC solar cell module according to claim 1, wherein the number of first low-temperature welding wires and second low-temperature welding wires of the conductive strip is equal, and the first low-temperature welding wires and the second low-temperature welding wires are all along the Extending along the arrangement direction of the battery sheets, the first low-temperature welding wire and the second low-temperature welding wire are alternately distributed along the vertical direction of the arrangement direction of the battery sheets.
  3. 根据权利要求1所述的IBC太阳能电池组件，其特征在于，所述第一电池片和所述第二电池片的正负极细栅线均沿着电池片的排布方向的垂直方向上延伸，且所述第一电池片和所述第二电池片的正极细栅线和负极细栅线沿着所述电池片的排布方向交替分布。The IBC solar cell module according to claim 1, wherein the positive and negative electrode thin grid lines of the first cell sheet and the second cell sheet both extend in a vertical direction along the arrangement direction of the cell sheets. , and the positive electrode fine grid lines and the negative electrode fine grid lines of the first battery sheet and the second battery sheet are alternately distributed along the arrangement direction of the battery sheets.
  4. 根据权利要求3所述的IBC太阳能电池组件，其特征在于，在所述第一电池片和所述第二电池片的正负极细栅线的预定区域上设置有锡膏焊点，其中，所述第一低温焊丝通过所述锡膏焊点与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线进行垂直连接；所述第二低温焊丝通过所述锡膏焊点与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线进行垂直连接。The IBC solar cell module according to claim 3, characterized in that solder paste solder joints are provided on predetermined areas of the positive and negative electrode thin grid lines of the first cell sheet and the second cell sheet, wherein, The first low-temperature solder wire is vertically connected to the first positive electrode thin grid line of the first cell sheet and the second negative electrode thin grid line of the second cell sheet through the solder paste solder joint; The welding wire is vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet through the solder paste solder joint.
  5. 根据权利要求4所述的IBC太阳能电池组件，其特征在于，所述第一电池片和所述第二电池片的与所述预定区域之外的区域相对的正负极细栅线上涂覆有绝缘胶，其中，所述第一低温焊丝通过所述绝缘胶以避免与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线形成接触；所述第二低温焊丝通过所述绝缘胶以避免与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线形成接触。 The IBC solar cell module according to claim 4, characterized in that, the positive and negative electrode thin grid lines of the first cell sheet and the second cell sheet opposite to the area outside the predetermined area are coated with There is an insulating glue, wherein the first low-temperature welding wire passes through the insulating glue to avoid contact with the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet; The second low-temperature welding wire passes through the insulating glue to avoid contact with the first positive electrode thin grid line of the first battery sheet and the second negative electrode thin grid line of the second battery sheet.
  6. 根据权利要求2所述的IBC太阳能电池组件，其特征在于，所述导电带还包括基底层和粘接层，其中，所述粘接层层叠于所述基底层上，所述第一低温焊丝和所述第二低温焊丝固定于所述粘结层上。The IBC solar cell module according to claim 2, wherein the conductive tape further includes a base layer and an adhesive layer, wherein the adhesive layer is laminated on the base layer, and the first low-temperature welding wire and the second low-temperature welding wire is fixed on the adhesive layer.
  7. 根据权利要求1～6任一所述的IBC太阳能电池组件，其特征在于，所述IBC太阳能电池组件还包括前板玻璃、第一封装胶膜、第二封装胶膜和背板层，其中，所述第一封装胶膜覆盖所述第一电池片和所述第二电池片的电池正面；所述导电带覆盖所述第一电池片和所述第二电池片的电池背面；所述第二封装胶膜覆盖所述导电带；所述前板玻璃设置于所述第一封装胶膜上，所述背板层设置于所述第二封装胶膜上。The IBC solar cell module according to any one of claims 1 to 6, characterized in that the IBC solar cell module further includes a front glass, a first encapsulation film, a second encapsulation film and a backsheet layer, wherein, The first encapsulating film covers the front side of the first battery sheet and the second battery sheet; the conductive tape covers the back side of the first battery sheet and the second battery sheet; the third Two encapsulation films cover the conductive tape; the front glass is disposed on the first encapsulation film, and the backplane layer is disposed on the second encapsulation film.
  8. 一种IBC太阳能电池组串，其特征在于，所述IBC太阳能电池组串包括权利要求1至7任一所述的多个IBC太阳能电池组件，所述IBC太阳能电池组件之间并联连接。An IBC solar cell string, characterized in that the IBC solar cell string includes a plurality of IBC solar cell modules as described in any one of claims 1 to 7, and the IBC solar cell modules are connected in parallel.
  9. 一种IBC太阳能电池组件的制作方法，其特征在于，所述制作方法包括：A method for manufacturing IBC solar cell modules, characterized in that the manufacturing method includes:
    在粘接层上形成若干条相互平行且交替设置的第一低温焊丝和第二低温焊丝，形成导电带；Form several first low-temperature welding wires and second low-temperature welding wires that are parallel to each other and alternately arranged on the adhesive layer to form a conductive strip;
    将若干第一电池片和第二电池片若干依次排布设置于导电带上，并进行热压，以将若干所述第一电池片和所述第二电池片与导电带进行粘接固定形成电池串；其中，所述第一低温焊丝与所述第一电池片的第一正极细栅线和所述第二电池片的第二负极细栅线垂直连接，且使所述第二低温焊丝与所述第一电池片的第一负极细栅线和所述第二电池片的第二正极细栅线垂直连接，实现各个电池片的串联；Arrange a plurality of first battery sheets and a plurality of second battery sheets on the conductive tape in sequence, and perform hot pressing to bond and fix the plurality of first battery sheets and the second battery sheets to the conductive tape to form a Battery string; wherein the first low-temperature welding wire is vertically connected to the first positive electrode thin grid line of the first battery piece and the second negative electrode thin grid line of the second battery piece, and the second low-temperature welding wire Vertically connected to the first negative electrode thin grid line of the first battery sheet and the second positive electrode thin grid line of the second battery sheet to achieve series connection of each battery sheet;
    其中，所述第一电池片和所述第二电池片的正负极细栅线均沿着电池片的排布方向的垂直方向上延伸，且所述第一电池片和所述第二电池片的正极细栅线和负极细栅线沿着所述电池片的排布方向交错分布，所述第一电池片和所述第二电池片均为无主栅IBC太阳能电池片。Wherein, the positive and negative electrode thin grid lines of the first battery sheet and the second battery sheet both extend in the vertical direction along the arrangement direction of the battery sheets, and the first battery sheet and the second battery sheet The positive electrode fine grid lines and the negative electrode fine grid lines of the sheets are staggered along the arrangement direction of the battery sheets. The first battery sheet and the second battery sheet are both main grid-less IBC solar cells.
  10. 根据权利要求9所述的IBC太阳能电池组件的制作方法，其特征在于，所述制作方法还包括：The manufacturing method of IBC solar cell module according to claim 9, characterized in that the manufacturing method further includes:
    将所述电池串按照组件电路排版互联于第一封装胶膜上，电池片正面与第一封装胶膜接触，所述第一封装胶膜叠层于前板玻璃上，然后将第二封装胶膜和背板层依次叠层于所述电池串上，所述第二封装胶膜与所述导电带的基底层 接触，所述背板层与所述第二封装胶膜接触；The battery strings are interconnected on the first packaging film according to the component circuit layout, the front side of the battery sheet is in contact with the first packaging film, the first packaging film is laminated on the front glass, and then the second packaging film is The film and backplane layers are laminated on the battery string in sequence, and the second encapsulating adhesive film and the base layer of the conductive tape Contact, the backplane layer is in contact with the second packaging film;
    将叠层好的结构进行层压形成一体化电池组件结构。 The stacked structures are laminated to form an integrated battery module structure.
PCT/CN2023/101105 2022-07-12 2023-06-19 Ibc solar cell module and manufacturing method thereof, and ibc solar cell module string WO2024012160A1 (en)

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