WO2024066719A1 - 一种太阳能电池片双面焊接方法 - Google Patents

一种太阳能电池片双面焊接方法 Download PDF

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Publication number
WO2024066719A1
WO2024066719A1 PCT/CN2023/110135 CN2023110135W WO2024066719A1 WO 2024066719 A1 WO2024066719 A1 WO 2024066719A1 CN 2023110135 W CN2023110135 W CN 2023110135W WO 2024066719 A1 WO2024066719 A1 WO 2024066719A1
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Prior art keywords
strip
shaped conductive
conductive connector
welding
carrier
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PCT/CN2023/110135
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English (en)
French (fr)
Inventor
王伟亮
陈章洋
曹育红
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常州时创能源股份有限公司
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Publication of WO2024066719A1 publication Critical patent/WO2024066719A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426Fixtures for other work
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/04Semiconductor 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
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/05Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504Electrical 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor 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
    • H01L31/18Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/1876Particular processes or apparatus for batch treatment of the devices
    • H01L31/188Apparatus specially adapted for automatic interconnection of solar cells in a module
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/36Electric or electronic devices

Definitions

  • the invention relates to the photovoltaic field, and in particular to a double-sided welding method for a solar cell sheet.
  • the cells In the traditional crystalline silicon photovoltaic module manufacturing process, the cells must first be welded with welding ribbons and connected in series to form a cell string.
  • the method of forming a string of cells includes: placing the welding ribbons and cells alternately in sequence, with the length of the welding ribbon being approximately twice the width of the cell, so that half of the welding ribbon is on the front of a cell and the other half is on the back of the adjacent cell, and a cell string containing multiple cells and the upper and lower surfaces (i.e., positive and negative electrodes) connected in series is formed in sequence.
  • the cell string is then transferred to the welding station through an adsorption track, and generally multiple pressing wires or pressing blocks are used to compact the upper and lower welding ribbons with the cells, and the welding ribbons are welded to the surface electrodes of the cells through infrared heating.
  • the battery cell When welding the soldering ribbon to the battery cell, the battery cell is generally placed flat on a flat supporting surface, and the soldering ribbon is mainly pressed together with a wire mesh or a pressing block perpendicular to the direction of the soldering ribbon to bring the soldering ribbon into contact with the battery cell to complete the welding.
  • the pressure is applied at several scattered points on the soldering ribbon, and effective contact cannot be guaranteed at the parts without pressure.
  • the soldering ribbon is heated, the unpressed parts of the soldering ribbon are very likely to stretch and twist, making welding impossible.
  • a pressing wire presses multiple soldering ribbons vertically and crosswise at the same time, and the middle soldering ribbon is subjected to little force or the pressing wire is suspended in the air and no effective pressing is formed, resulting in invalid welding at this part. Therefore, the traditional welding process for welding soldering ribbons to battery cells results in many false welds.
  • triangular welding ribbons and other special-shaped welding ribbons with optical advantages are increasingly used.
  • the pattern for collecting current on the surface of the battery cell is a fine grid.
  • the aspect ratio of the fine grid should be as large as possible; the pattern used for connecting the battery cells in series and collecting the fine grid current is the main grid.
  • the cost of crystalline silicon accounts for about half. The thicker the silicon wafer is, the more crystalline silicon material is used, and the higher the cost of crystalline silicon is, so the application of thin silicon wafers is also one of the important directions for the development of photovoltaic modules.
  • the diameter of the smallest round wire welding ribbon currently used is less than 0.2mm.
  • Conventional welding process equipment mainly uses grippers to grab, pull, transfer, and place, and presses blocks to reduce the offset, rolling, and twisting of the welding ribbons.
  • the object of the present invention is to provide a double-sided welding method for a solar cell, wherein strip-shaped conductive connectors are welded on both sides of the cell (i.e., the front and back sides of the cell); the strip-shaped conductive connectors include a first strip-shaped conductive connector and a second strip-shaped conductive connector respectively disposed on both sides of the cell; and the method comprises the following steps:
  • a carrying surface for placing the battery cell is provided on the outer surface of a welding carrier, and the carrying surface is an outwardly convex arc surface (can be a circular arc surface); a wiring groove for placing the first strip-shaped conductive connecting member is provided on the carrying surface, and the wiring groove extends along the circumference of the carrying surface (that is, the extension direction of the wiring groove is perpendicular to the axis of the carrying surface), and the wiring groove is a through groove on the carrying surface;
  • the routing groove restricts the first strip-shaped conductive connection member therein to extend in the same direction as the routing groove, and the first strip-shaped conductive connection member protrudes from the routing groove (that is, the first strip-shaped conductive connection member protrudes from the bearing surface);
  • the second strip-shaped conductive connector is stretched and fitted on the outer side surface of the battery cell (i.e., the side surface of the battery cell opposite to the supporting surface) along the circumference of the supporting surface, so that the second strip-shaped conductive connector presses the battery cell onto the first strip-shaped conductive connector protruding from the supporting surface;
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are heated so that both the first strip-shaped conductive connector and the second strip-shaped conductive connector are welded on the battery cell (the strip-shaped conductive connectors are welded on both sides of the battery cell).
  • each routing groove extends along the circumference of the carrying surface (that is, the extension direction of each routing groove is perpendicular to the axis of the carrying surface), and each routing groove is a through groove; and when the first strip-shaped conductive connector is pre-set, each routing groove has the first strip-shaped conductive connector routing (the routing groove restricts the first strip-shaped conductive connector therein to extend in the same direction as the first strip-shaped conductive connector), and the first strip-shaped conductive connector protrudes from the routing groove in which it is located (that is, the first strip-shaped conductive connector protrudes from the carrying surface); and when the battery cell is placed on the carrying surface, the extension direction of the grid lines on the inner side surface of the battery cell
  • the second strip-shaped conductive connector is tightly fitted on the outer side of the battery cell, the second strip-shaped conductive connector is fitted correspondingly with the grid lines on the outer side of the battery cell.
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are cut off to leave small segments of the first strip-shaped conductive connector and the second strip-shaped conductive connector on the battery cell, and the small segments of the first strip-shaped conductive connector and the second strip-shaped conductive connector are used for connecting the battery cells in series (one end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector exceeds the battery cell in which they are located, and the other end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector does not exceed the battery cell in which they are located); then the battery cell is removed from the carrying surface of the welding carrier.
  • the specific implementation method of pre-setting the first strip-shaped conductive connector For the specific selection of the first strip-shaped conductive connector and the second strip-shaped conductive connector, the specific implementation method of pre-setting the first strip-shaped conductive connector, the specific implementation method of stretching the second strip-shaped conductive connector tightly against the outer surface of the battery cell, the specific implementation method of heating the first strip-shaped conductive connector and the second strip-shaped conductive connector, and other related specific contents, please refer to the embodiments.
  • the present invention can simultaneously complete the welding of strip-shaped conductive connectors on both side surfaces of the battery cell, can simplify the process of welding strip-shaped conductive connectors (welding wires or welding strips) on both side surfaces of the battery cell, can optimize the effective contact between the strip-shaped conductive connectors (welding wires or welding strips) on both side surfaces of the battery cell and the battery cell, can improve the welding performance, and improve the welding efficiency.
  • the bearing surface of the welding carrier of the present invention is an outwardly convex arc surface
  • the first strip-shaped conductive connector (welding wire or welding strip) is pre-set in a routing groove extending along the circumferential direction of the bearing surface
  • the battery cell is placed on the bearing surface, and the battery cell is attached to the first strip-shaped conductive connector protruding from the bearing surface
  • the second strip-shaped conductive connector (welding wire or welding strip) is tightly fitted on the battery cell along the circumferential direction of the arc surface of the bearing surface, and then the second strip-shaped conductive connector presses the battery cell onto the first strip-shaped conductive connector protruding from the bearing surface; during welding, the first strip-shaped conductive connector (welding wire or welding strip), the battery cell and the second strip-shaped conductive connector (welding wire or welding strip) are bent on the bearing surface along the circumferential direction of the arc surface of the bearing surface, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector
  • the present invention can wind multiple rows of battery cells at one time, weld multiple rows of battery cells at one time, and weld strip-shaped conductive connectors (first strip-shaped conductive connectors and second strip-shaped conductive connectors) on both sides of multiple rows of battery cells at one time, thereby improving welding efficiency.
  • the present invention has less false welds; since the first strip-shaped conductive connecting member (welding wire or welding strip), the second strip-shaped conductive connecting member (welding wire or welding strip) and the battery cell can be continuously attached and evenly stressed, welding is completed under the condition of full contact under stress, so the welding is complete and sufficient, which can greatly reduce the number of false welds.
  • the number of reels of the first strip-shaped conductive connecting member (welding wire or welding ribbon) and the second strip-shaped conductive connecting member (welding wire or welding ribbon) used in the present invention is small and easy to control;
  • the present invention can use only one first strip-shaped conductive connector to carry out the winding and routing of all routing grooves on the welding carrier, and the first strip-shaped conductive connectors (welding wire or welding strip) of all routing grooves on the welding carrier are all from the same reel; the present invention can also use only one second strip-shaped conductive connector to carry out the winding of all battery cells on the welding carrier, and the second strip-shaped conductive connectors (welding wire or welding strip) of all battery cells on the welding carrier are all from the same reel; therefore, the number of reels is greatly reduced in the present invention, thereby simplifying the equipment space design, and the first strip-shaped conductive connector (welding wire or welding strip) and the second strip-shaped conductive connector (welding wire or welding strip) Breakage, deviation and other fault maintenance and line replacement operations are also greatly simplified.
  • the first strip-shaped conductive connecting member (welding wire or welding strip) and the second strip-shaped conductive connecting member (welding wire or welding strip) have little deviation; after the first strip-shaped conductive connecting member (welding wire or welding strip) is discharged from the reel, it can directly reach the side circumference of the welding carrier, and be wound along the wiring groove and tightly wrapped around the side circumference of the welding carrier, which can completely eliminate the conventional actions of cutting, clamping, stretching, and transporting the first strip-shaped conductive connecting member (welding wire or welding strip), and almost completely eliminate the possibility of deviation of the first strip-shaped conductive connecting member (welding wire or welding strip); after the second strip-shaped conductive connecting member (welding wire or welding strip) is discharged from the reel, it can directly reach the battery cell, and be aligned with the grid line on the battery cell and tightened and fixed, which can completely eliminate the conventional actions of cutting, clamping, stretching, and transporting the second strip-shaped conductive connecting member (
  • the present invention can weld a large number of first strip-shaped conductive connector segments and second strip-shaped conductive connector segments (the first strip-shaped conductive connector segments and the second strip-shaped conductive connector segments are used for the series connection of the battery slices on which they are located) on a single battery slice at one time, and can weld and form hundreds of first strip-shaped conductive connector segments and second strip-shaped conductive connector segments on a single battery slice at one time.
  • the final number of first strip-shaped conductive connector segments on a single battery slice is equal to the number of rotations of the side circumference of the welding carrier when the first strip-shaped conductive connector is wound, and the final number of second strip-shaped conductive connector segments on a single battery slice is equal to the number of rotations of the side circumference of the welding carrier when the second strip-shaped conductive connector is wound; it is easy to control and implement.
  • the present invention can be applied to the welding of special-shaped welding strips (such as triangular welding strips) that require direction identification.
  • the wiring groove V-shaped groove
  • the wiring groove can support the triangular welding strip that is routed therein to keep the bottom surface facing outward, so as to prevent the triangular welding strip from twisting when routing in the wiring groove, and can eventually make the bottom surface of the triangular welding strip face the inner side surface of the battery cell, so that the first strip-shaped conductive connector (triangular welding strip) can eventually be stably attached to the corresponding grid line on the inner side surface of the battery cell.
  • the bearing surface (the convex arc surface) can automatically correct the direction of the top angle of the triangular welding strip, so that the top angle of the triangular welding strip faces upward and the bottom surface faces downward.
  • the present invention can realize the welding of special-shaped welding strips such as triangular welding strips, and the triangular welding strips are not easy to flip and have a high yield.
  • 1 to 5 are schematic diagrams of the present invention.
  • the present invention provides a double-sided welding method for a solar cell, which comprises welding strip-shaped conductive connectors on both sides of the cell (i.e., the front and back sides of the cell); the strip-shaped conductive connectors comprise a first strip-shaped conductive connector and a second strip-shaped conductive connector respectively arranged on both sides of the cell; and the method comprises the following steps:
  • a carrying surface for placing the battery cell is provided on the outer surface of a welding carrier, and the carrying surface is an outwardly convex arc surface (which may be a circular arc surface), and the arc height of the arc surface is not greater than one-fourth of the arc length;
  • a wiring groove for placing the first strip-shaped conductive connector is provided on the carrying surface, and the wiring groove extends along the circumference of the carrying surface (that is, the extension direction of the wiring groove is perpendicular to the axis of the carrying surface), and the wiring groove is a through groove on the carrying surface;
  • the routing groove restricts the first strip-shaped conductive connection member therein to extend in the same direction as the routing groove, and the first strip-shaped conductive connection member protrudes from the routing groove (that is, the first strip-shaped conductive connection member protrudes from the bearing surface);
  • the battery cell is placed on the carrying surface so that the battery cell does not protrude beyond the carrying surface, so that the side surface of the first strip-shaped conductive connecting member to be welded on the battery cell faces the carrying surface (that is, the side surface of the second strip-shaped conductive connecting member to be welded on the battery cell faces away from the carrying surface), and the inner side surface of the battery cell (that is, the side surface of the battery cell facing the carrying surface) is attached to the first strip-shaped conductive connecting member protruding from the carrying surface;
  • the second strip-shaped conductive connector is stretched and attached to the outer side surface of the battery cell (i.e., the side surface of the battery cell opposite to the supporting surface) along the circumference of the supporting surface, and then the second strip-shaped conductive connector presses the battery cell onto the first strip-shaped conductive connector protruding from the supporting surface;
  • first strip-shaped conductive connection member and the second strip-shaped conductive connection member are heated by direct heating, infrared heating or hot air heating, so that the first strip-shaped conductive connection member and the second strip-shaped conductive connection member are welded on the battery cell;
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are cut off, so that a small segment of the first strip-shaped conductive connector and a small segment of the second strip-shaped conductive connector remain on the battery cell, and the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector are used for connecting the battery cells where they are located in series (one end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector exceeds the battery cell where they are located, and the other end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector does not exceed the battery cell where they are located);
  • the carrying surface can have a vacuum adsorption function (for example, the carrying surface can be evenly distributed with air suction ports, and vacuum adsorption is performed through the air suction ports); when placing the battery cell on the carrying surface, the battery cell is vacuum adsorbed through the carrying surface, so that the battery cell is stably adsorbed on the carrying surface.
  • a vacuum adsorption function for example, the carrying surface can be evenly distributed with air suction ports, and vacuum adsorption is performed through the air suction ports
  • the welding carrier can be provided with a heating function, and the first strip-shaped conductive connector on the carrier surface, the battery cell, and the second strip-shaped conductive connector on the outer surface of the battery cell are heated by the welding carrier.
  • a plurality of parallel wiring grooves are arranged on the bearing surface (so that the wiring grooves on the bearing surface correspond to the inner side grid lines of the battery cells placed on the bearing surface one by one), so that each wiring groove extends along the circumference of the bearing surface (that is, the extension direction of each wiring groove is perpendicular to the axis of the bearing surface), and each wiring groove is a through groove;
  • the first strip-shaped conductive connector When the first strip-shaped conductive connector is pre-placed, the first strip-shaped conductive connector is routed in each routing groove (the routing groove restricts the first strip-shaped conductive connector therein to extend in the same direction as the routing groove), and the first strip-shaped conductive connector protrudes from the routing groove where it is located (that is, the first strip-shaped conductive connector protrudes from the bearing surface);
  • the extension direction of the grid lines on the inner side of the cell is perpendicular to the axis of the carrier surface, and the grid lines on the inner side of the cell are correspondingly fitted with the first strip-shaped conductive connectors protruding from the carrier surface in each routing groove on the carrier surface.
  • the outer side of the cell is provided with multiple parallel grid lines (the grid lines on the outer side of the cell can be parallel to the grid lines on the inner side of the cell);
  • the second strip-shaped conductive connecting member When the second strip-shaped conductive connecting member is stretched and tightly fitted on the outer side of the battery cell, the second strip-shaped conductive connecting member is correspondingly fitted with the grid lines on the outer side of the battery cell.
  • the strip-shaped conductive connecting member (the first strip-shaped conductive connecting member, the second strip-shaped conductive connecting member) may be a welding wire or a welding strip;
  • the strip-shaped conductive connection member (the first strip-shaped conductive connection member, the second strip-shaped conductive connection member) has a flat bottom surface for welding with the battery cell (for example, the cross-sectional shape of the first strip-shaped conductive connection member, the second strip-shaped conductive connection member is a triangle or a rectangle);
  • the first strip-shaped conductive connector that is supported by the wiring groove for wiring is kept flat and opposite to the bearing surface, so as to prevent the first strip-shaped conductive connector from twisting when wiring in the wiring groove (for example, the cross-sectional shape of the wiring groove is matched with the cross-sectional shape of the first strip-shaped conductive connector, and the first strip-shaped conductive connector is embedded in the wiring groove for wiring); and when pre-setting the first strip-shaped conductive connector, the flat bottom surface of the first strip-shaped conductive connector is arranged opposite to the bearing surface, so that the first strip-shaped conductive connector can finally be stably attached to the inner side surface of the battery cell;
  • the first strip-shaped conductive connection member may be a triangular welding strip;
  • the wiring groove is a V-shaped groove into which the top corner of the triangular welding strip can be embedded; when the first strip-shaped conductive connection member is routed in the wiring groove, the top corner of the first strip-shaped conductive connection member is embedded in the wiring groove, and the bottom surface of the first strip-shaped conductive connection member protrudes from the wiring groove;
  • the flat bottom surface of the second strip-shaped conductive connecting member faces the outer side surface of the battery cell, so that the second strip-shaped conductive connecting member is stably attached to the outer side surface of the battery cell;
  • the second strip-shaped conductive connector can be a triangular welding strip; when the second strip-shaped conductive connector (triangular welding strip) is stretched and fitted tightly to the outer side of the battery cell, the bottom surface of the triangular welding strip is directed toward the outer side surface of the battery cell (that is, the top angle of the triangular welding strip is opposite to the outer side surface of the battery cell), so that the second strip-shaped conductive connector (triangular welding strip) is stably fitted to the outer side surface of the battery cell.
  • the second strip-shaped conductive connector can be stretched and fitted to the outer surface of the battery cell by allowing the second strip-shaped conductive connector to cross the battery cell along the circumference of the supporting surface and pulling the sections of the second strip-shaped conductive connector located outside the two sides of the battery cell toward the welding carrier and/or the supporting surface.
  • the welding carrier may be provided with a rotating shaft, and the outer surface of the welding carrier may include a side circumferential surface surrounding the rotating shaft; the bearing surface may be located on the side circumferential surface of the welding carrier, and the axis of the bearing surface may be parallel or colinear with the axis of the rotating shaft; and the first strip-shaped conductive connector may be pre-placed by winding the first strip-shaped conductive connector along the wiring groove and tightly wrapping the side circumferential surface of the welding carrier; and the second strip-shaped conductive connector may be tightly fitted on the outer surface of the battery cell by winding the second strip-shaped conductive connector circumferentially along the side circumferential surface of the welding carrier and tightly wrapping the battery cell on the side circumferential surface of the welding carrier;
  • the axis of the rotating shaft is located on the center line of the welding carrier, when the first strip-shaped conductive connection piece is wound along the wiring groove and tightly wrapped around the side circumference of the welding carrier, the side circumference of the welding carrier is rotated around the axis of the rotating shaft to facilitate the winding of the first strip-shaped conductive connection piece; and when the second strip-shaped conductive connection piece is wound along the circumferential direction of the side circumference of the welding carrier and tightly wrapped around the battery cell on the side circumference of the welding carrier, the side circumference of the welding carrier is rotated around the axis of the rotating shaft to facilitate the winding of the second strip-shaped conductive connection piece;
  • first strip-shaped conductive connection member may be used to realize that the first strip-shaped conductive connection member is wound along the wiring groove and tightly wound around the side circumference of the welding carrier; only one second strip-shaped conductive connection member may be used to realize that the second strip-shaped conductive connection member is wound around the side circumference of the welding carrier and tightly wound around the battery cell on the side circumference of the welding carrier;
  • multiple rows of bearing surfaces with wiring grooves can be arranged on the side circumference of the welding carrier, so that each row of bearing surfaces is arranged in sequence along the circumference of the side circumference of the welding carrier, and the bearing surfaces in the same row are arranged in sequence along the axial direction of the rotating shaft, and the axis of each bearing surface is parallel or colinear with the axis of the rotating shaft; more specifically, the multiple rows of bearing surfaces can be evenly distributed along the circumference of the side circumference of the welding carrier, and even the bearing surfaces can be evenly distributed on the side circumference of the welding carrier; battery cells are placed on the multiple rows of bearing surfaces respectively (the multiple rows of bearing surfaces are pre-wound with the first strip-shaped conductive connector), so that the second strip-shaped conductive connector can be wrapped around multiple rows of battery cells at a time, and finally multiple rows of battery cells can be welded at one time (the welding of the first strip-shaped conductive connector and the second strip-shaped conductive connector on multiple rows of battery cells is completed simultaneously), which can improve the
  • this embodiment provides a double-sided welding method for a solar cell, wherein strip-shaped conductive connectors are welded on both side surfaces of the cell (i.e., the front and back sides of the cell); the strip-shaped conductive connectors include a first strip-shaped conductive connector and a second strip-shaped conductive connector respectively disposed on both side surfaces of the cell; and a plurality of parallel grid lines are disposed on the inner side surface of the cell; and a plurality of parallel grid lines are also disposed on the outer side surface of the cell, and the grid lines on the outer side surface of the cell are parallel to the grid lines on the inner side surface of the cell);
  • the double-sided welding method of a solar cell comprises the following steps:
  • a welding carrier with a rotating shaft is provided, so that the axis of the rotating shaft is located on the center line of the welding carrier, and the welding carrier has a side circumferential surface surrounding the rotating shaft; a pair of bearing surfaces for placing battery cells are provided on the side circumferential surface of the welding carrier, so that the pair of bearing surfaces are both convex arc surfaces (can be circular arc surfaces), the pair of bearing surfaces are symmetrically arranged, and the axis centers of the pair of bearing surfaces are parallel or colinear with the axis center of the rotating shaft; a plurality of parallel wiring grooves are respectively provided on the pair of bearing surfaces (so that the wiring grooves on the bearing surfaces are aligned with the inner side grid lines of the battery cells placed on the bearing surfaces one by one Correspondingly, the wiring grooves on the same bearing surface can be arranged at equal intervals), each wiring groove can be an annular groove that surrounds the side circumference of the welding carrier and is perpendicular to the rotating shaft; the wiring groove is used for the first strip-shaped
  • the first strip-shaped conductive connector is pre-set by winding the first strip-shaped conductive connector along the circumferential direction of the side circumference of the welding carrier and tightening the side circumference of the welding carrier; and the first strip-shaped conductive connector is routed in each routing groove, and the first strip-shaped conductive connector is protruded from each routing groove (that is, the first strip-shaped conductive connector is protruded from each bearing surface); specifically, only one first strip-shaped conductive connector can be used for winding; the first strip-shaped conductive connector can be a flat welding strip, and when winding the flat welding strip, the bottom surface of the flat welding strip is facing outward, and the bottom surface of the flat welding strip can finally be made to face the inner side surface of the battery cell, so that the flat welding strip can finally be stably attached to the corresponding grid line on the inner side surface of the battery cell; and when winding the first strip-shaped conductive connector, the side circumference of the welding carrier is rotated around the axis of the rotating shaft, which
  • the battery cells are respectively placed on the pair of supporting surfaces, so that the battery cells do not extend beyond the supporting surfaces to which they are attached, so that the side surface of the first strip-shaped conductive connector to be welded on the battery cell faces the corresponding supporting surface (that is, the side surface of the second strip-shaped conductive connector to be welded on the battery cell faces away from the corresponding supporting surface), so that the extension direction of the grid lines on the inner side surface of the battery cell (that is, the side surface of the battery cell facing the corresponding supporting surface) is perpendicular to the axis of the corresponding supporting surface (that is, perpendicular to the axis of the rotating shaft), and the grid lines on the inner side surface of the battery cell are correspondingly attached to the first strip-shaped conductive connector protruding from the supporting surface in each routing groove on the corresponding supporting surface; and the battery cell on it is vacuum-adsorbed by the supporting surface, so that the battery cell is stably adsorbed on the corresponding supporting surface;
  • the second strip-shaped conductive connector wrap around the circumference of the side surface of the welding carrier and tighten the battery cell on the side surface of the welding carrier, the second strip-shaped conductive connector is tightly fitted on the outer side surface of each battery cell, and then the second strip-shaped conductive connector presses the battery cell on the first strip-shaped conductive connector protruding from the bearing surface; and when winding the second strip-shaped conductive connector, the second strip-shaped conductive connector is correspondingly fitted with the grid line on the outer side surface of the battery cell; specifically, only one second strip-shaped conductive connector can be used for winding; the second strip-shaped conductive connector can be a flat welding strip, and when winding the flat welding strip, the bottom surface of the flat welding strip is facing the outer side surface of the battery cell, so that the flat welding strip is stably fitted on the corresponding grid line on the outer side surface of the battery cell; and when winding the second strip-shaped conductive connector, the side surface of the welding carrier is rotated around the axis of the rotating
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are heated, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell; specifically: 1) the first strip-shaped conductive connector, the battery cell and the second strip-shaped conductive connector on the outer side of the battery cell on each carrier surface can be heated by a welding carrier, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell; 2) infrared heating can also be used (such as using linear infrared to irradiate the outer side surface of each battery cell and the second strip-shaped conductive connector on the outer side surface) to heat each battery cell and the first strip-shaped conductive connector and the second strip-shaped conductive connector on both sides of the battery cell, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell;
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are cut off, so that a small segment of the first strip-shaped conductive connector and a small segment of the second strip-shaped conductive connector remain on the battery cell, and the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector are used for connecting the battery cells where they are located in series (one end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector exceeds the battery cell where they are located, and the other end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector does not exceed the battery cell where they are located);
  • each battery cell is removed from the corresponding supporting surface of the welding carrier (after welding the strip-shaped conductive connectors on both sides of the battery cell).
  • this embodiment provides a double-sided welding method for a solar cell, wherein strip-shaped conductive connectors are welded on both side surfaces of the cell (i.e., the front and back sides of the cell); the strip-shaped conductive connectors include a first strip-shaped conductive connector and a second strip-shaped conductive connector respectively disposed on both side surfaces of the cell; and a plurality of parallel grid lines are disposed on the inner side surface of the cell; and a plurality of parallel grid lines are also disposed on the outer side surface of the cell, and the grid lines on the outer side surface of the cell are parallel to the grid lines on the inner side surface of the cell);
  • the double-sided welding method of a solar cell comprises the following steps:
  • a welding carrier with a rotating shaft is provided, and the axis of the rotating shaft is located on the center line of the welding carrier;
  • the welding carrier has a side surface surrounding the rotating shaft, and the side surface of the welding carrier is surrounded by a plurality of bearing surfaces for battery cells to be placed
  • the main body of the welding carrier can be a prism with a coaxial center with the rotating shaft
  • the plurality of bearing surfaces are all convex arc surfaces (can be circular arc surfaces), and the axis centers of the plurality of bearing surfaces are parallel to or colinear with the axis center of the rotating shaft
  • a plurality of parallel wiring grooves are respectively provided on the plurality of bearing surfaces (the wiring grooves on the bearing surfaces are aligned with the inner surface of the battery cells placed on the bearing surfaces);
  • the side grid lines are matched one by one, so that the wiring grooves on the same bearing surface can be arranged at equal intervals), each wiring groove can be an annular groove that surrounds the side circumference of the welding carrier and is per
  • the first strip-shaped conductive connector is pre-set by winding the first strip-shaped conductive connector along the circumferential direction of the side circumference of the welding carrier and tightening the side circumference of the welding carrier; and the first strip-shaped conductive connector is routed in each routing groove, and the first strip-shaped conductive connector is protruded from each routing groove (that is, the first strip-shaped conductive connector is protruded from each bearing surface); specifically, only one first strip-shaped conductive connector can be used for winding; the first strip-shaped conductive connector can be a round wire welding strip; and when winding the first strip-shaped conductive connector, the side circumference of the welding carrier is rotated around the axis of the rotating shaft, which can facilitate the winding of the first strip-shaped conductive connector; more specifically, the rotating shaft can be driven to rotate around its own axis by an external mechanism (such as a motor), and the welding carrier can be driven to rotate as a whole by the rotating shaft, thereby achieving the rotation of the side circumference of the
  • the battery cells are respectively placed on the multiple carrying surfaces, so that the battery cells do not extend beyond the carrying surfaces to which they are attached, so that the side surface of the first strip-shaped conductive connector to be welded on the battery cell faces the corresponding carrying surface (that is, the side surface of the second strip-shaped conductive connector to be welded on the battery cell faces away from the corresponding carrying surface), so that the extension direction of the grid line on the inner side surface of the battery cell (that is, the side surface of the battery cell facing the corresponding carrying surface) is perpendicular to the axis of the corresponding carrying surface (that is, perpendicular to the axis of the rotating shaft), and the grid line on the inner side surface of the battery cell is correspondingly attached to the first strip-shaped conductive connector protruding from the carrying surface in each routing groove on the corresponding carrying surface; and the battery cell on it is vacuum-adsorbed by the carrying surface, so that the battery cell is stably adsorbed on the corresponding carrying surface;
  • the second strip-shaped conductive connector wrap around the circumference of the side surface of the welding carrier and tighten the battery cells on the side surface of the welding carrier, the second strip-shaped conductive connector is tightened and fitted on the outer side surface of each battery cell, and then the second strip-shaped conductive connector presses the battery cell onto the first strip-shaped conductive connector protruding from the bearing surface; and when winding the second strip-shaped conductive connector, the second strip-shaped conductive connector is correspondingly fitted with the grid lines on the outer side surface of the battery cell; specifically, only one second strip-shaped conductive connector can be used for winding; the second strip-shaped conductive connector can be a round wire welding strip; and when winding the second strip-shaped conductive connector, the side surface of the welding carrier is rotated around the axis of the rotating shaft, which can facilitate the winding of the second strip-shaped conductive connector; more specifically, the rotating shaft can be driven to rotate around its own axis by an external mechanism (such as a motor), and the welding carrier can be
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are heated, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell; specifically: 1) the first strip-shaped conductive connector, the battery cell and the second strip-shaped conductive connector on the outer side of the battery cell on each carrier surface can be heated by a welding carrier, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell; 2) hot air heating can also be used (such as using hot air to blow the outer side surface of each battery cell and the second strip-shaped conductive connector on the outer side surface) to heat each battery cell and the first strip-shaped conductive connector and the second strip-shaped conductive connector on both sides of the battery cell, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell;
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are cut off, so that a small segment of the first strip-shaped conductive connector and a small segment of the second strip-shaped conductive connector remain on the battery cell, and the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector are used for connecting the battery cells where they are located in series (one end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector exceeds the battery cell where they are located, and the other end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector does not exceed the battery cell where they are located);
  • each battery cell is removed from the corresponding supporting surface of the welding carrier (after welding the strip-shaped conductive connectors on both sides of the battery cell).
  • this embodiment provides a double-sided welding method for a solar cell, wherein strip-shaped conductive connectors are welded on both side surfaces of the cell (i.e., the front and back sides of the cell); the strip-shaped conductive connectors include a first strip-shaped conductive connector and a second strip-shaped conductive connector respectively disposed on both side surfaces of the cell; and a plurality of parallel grid lines are disposed on the inner side surface of the cell; and a plurality of parallel grid lines are also disposed on the outer side surface of the cell, and the grid lines on the outer side surface of the cell are parallel to the grid lines on the inner side surface of the cell);
  • the double-sided welding method of a solar cell comprises the following steps:
  • a welding carrier with a rotating shaft is provided, and the axis of the rotating shaft is located on the center line of the welding carrier;
  • the welding carrier has a side circumferential surface surrounding the rotating shaft, and the side circumferential surface of the welding carrier is a circumferential surface coaxial with the rotating shaft (the main body of the welding carrier can be a cylinder coaxial with the rotating shaft);
  • a plurality of arc surface areas are divided on the side circumferential surface of the welding carrier and are sequentially spaced along the circumferential direction of the side circumferential surface, and the plurality of arc surface areas are evenly distributed along the circumferential direction of the side circumferential surface of the welding carrier;
  • each arc surface area is a bearing surface for placing a battery cell;
  • a plurality of parallel wiring grooves are respectively provided on each bearing surface (the wiring grooves on the bearing surface and the inner side grid lines of the battery cell placed on the bearing surface are parallel to each other).
  • each wiring groove is an annular groove that surrounds the side circumference of the welding carrier and is coaxial with the rotating shaft, and each wiring groove is a V-shaped groove for the top angle of the triangular welding belt to be embedded;
  • the wiring groove is used for the first strip-shaped conductive connecting member (using a triangular welding belt) to be routed when it is wrapped around the side circumference of the welding carrier (the wiring groove can limit the first strip-shaped conductive connecting member/triangular welding belt routed therein to extend in the same direction as it);
  • each bearing surface has a vacuum adsorption function (for example, each bearing surface is evenly provided with an exhaust port, and vacuum adsorption can be performed through the exhaust port);
  • the welding carrier has a heating function that can heat each bearing surface;
  • the first strip-shaped conductive connector is pre-set by winding the first strip-shaped conductive connector along the circumferential direction of the side surface of the welding carrier and tightening the side surface of the welding carrier; and the first strip-shaped conductive connector is wired in each wiring groove, and the first strip-shaped conductive connector protrudes from each wiring groove (that is, the first strip-shaped conductive connector protrudes from each bearing surface); specifically, only one first strip-shaped conductive connector can be used for winding; the first strip-shaped conductive connector can be a triangular welding strip, and when winding the triangular welding strip, the top angle of the triangular welding strip is embedded in the wiring groove (V-shaped groove), and the flat bottom surface of the triangular welding strip protrudes from the wiring groove; the wiring groove (V-shaped groove) can The triangular welding strip supporting the wiring inside is kept with the bottom facing outward to prevent the triangular welding strip from twisting when the wiring is routed in the wiring groove, and the bottom surface of the triangular welding strip
  • the battery cells are respectively placed on each carrying surface so that the battery cells do not extend beyond the carrying surface to which they are attached, so that the side surface of the first strip-shaped conductive connector to be welded on the battery cell faces the corresponding carrying surface (that is, the side surface of the second strip-shaped conductive connector to be welded on the battery cell faces away from the corresponding carrying surface), so that the extension direction of the grid lines on the inner side surface of the battery cell (that is, the side surface of the battery cell facing the corresponding carrying surface) is perpendicular to the axis of the corresponding carrying surface (that is, perpendicular to the axis of the rotating shaft), and the grid lines on the inner side surface of the battery cell are correspondingly attached to the first strip-shaped conductive connector protruding from the carrying surface in each routing groove on the corresponding carrying surface; and the battery cell on it is vacuum-adsorbed by the carrying surface so that the battery cell is stably adsorbed on the corresponding carrying surface;
  • the second strip-shaped conductive connector is wound around the circumferential surface of the welding carrier and the battery cells on the circumferential surface of the welding carrier are tightly wound, so that the second strip-shaped conductive connector is tightly fitted on the outer side of each battery cell, and then the second strip-shaped conductive connector presses the battery cell onto the first strip-shaped conductive connector protruding from the carrier surface; and when the second strip-shaped conductive connector is wound, the second strip-shaped conductive connector is correspondingly fitted with the grid lines on the outer side of the battery cell; specifically, only one second strip-shaped conductive connector can be used for winding; the second strip-shaped conductive connector can be a triangular welding strip, and when the triangular welding strip is wound, the bottom surface of the triangular welding strip is facing the outer side of the battery cell (that is, the top angle of the triangular welding strip is aligned with the outer side of the battery cell) The triangular welding strip is wound in a manner that the bottom surface of the triangular welding strip is in contact with
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are heated, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell; specifically: 1) the first strip-shaped conductive connector, the battery cell and the second strip-shaped conductive connector on the outer side of the battery cell on each carrier surface can be heated by a welding carrier, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell; 2) hot air heating can also be used (such as using hot air to blow the outer side surface of each battery cell and the second strip-shaped conductive connector on the outer side surface) to heat each battery cell and the first strip-shaped conductive connector and the second strip-shaped conductive connector on both sides of the battery cell, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell;
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are cut off, so that a small segment of the first strip-shaped conductive connector and a small segment of the second strip-shaped conductive connector remain on the battery cell, and the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector are used for connecting the battery cells where they are located in series (one end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector exceeds the battery cell where they are located, and the other end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector does not exceed the battery cell where they are located);
  • each battery cell is removed from the corresponding supporting surface of the welding carrier (after welding the strip-shaped conductive connectors on both sides of the battery cell).
  • this embodiment provides a double-sided welding method for a solar cell, wherein strip-shaped conductive connectors are welded on both side surfaces of the cell (i.e., the front and back sides of the cell); the strip-shaped conductive connectors include a first strip-shaped conductive connector and a second strip-shaped conductive connector respectively disposed on both side surfaces of the cell; and a plurality of parallel grid lines are disposed on the inner side surface of the cell; and a plurality of parallel grid lines are also disposed on the outer side surface of the cell, and the grid lines on the outer side surface of the cell are parallel to the grid lines on the inner side surface of the cell);
  • the double-sided welding method of a solar cell comprises the following steps:
  • a welding carrier with a rotating shaft is provided, and the axis of the rotating shaft is located on the center line of the welding carrier;
  • the welding carrier has a side circumferential surface surrounding the rotating shaft, and the side circumferential surface of the welding carrier is a circumferential surface coaxial with the rotating shaft (the main body of the welding carrier can be a cylinder coaxial with the rotating shaft);
  • a plurality of rows of arc surface areas are divided on the side circumferential surface of the welding carrier, and the arc surface areas of each row are arranged in sequence along the circumferential direction of the side circumferential surface of the welding carrier, and the arc surface areas of the same row are arranged in sequence along the axial direction of the rotating shaft;
  • each arc surface area is a bearing surface for placing a battery cell;
  • a plurality of parallel wiring grooves are respectively provided on each bearing surface (so that the wiring grooves on the bearing surface are parallel to the battery cell placed on the bearing surface)
  • the inner side grid lines of the welding carrier are matched one
  • the first strip-shaped conductive connector is pre-placed by winding the first strip-shaped conductive connector along the circumferential direction of the side surface of the welding carrier and tightening the side surface of the welding carrier; and the first strip-shaped conductive connector is routed in each routing groove, and the first strip-shaped conductive connector protrudes from each routing groove (that is, the first strip-shaped conductive connector protrudes from each bearing surface); specifically, only one first strip-shaped conductive connector can be used for winding; the first strip-shaped conductive connector can be a triangular welding strip, and when winding the triangular welding strip, the top angle of the triangular welding strip is embedded in the routing groove (V-shaped groove), and the flat bottom surface of the triangular welding strip protrudes from the routing groove; the routing groove (V-shaped groove) can The triangular welding strip supporting the wiring inside is kept with the bottom facing outward to prevent the triangular welding strip from twisting when the wiring is routed in the wiring groove, and the bottom surface of the triangular welding
  • the battery cells are respectively placed on each carrying surface so that the battery cells do not extend beyond the carrying surface to which they are attached, so that the side surface of the first strip-shaped conductive connector to be welded on the battery cell faces the corresponding carrying surface (that is, the side surface of the second strip-shaped conductive connector to be welded on the battery cell faces away from the corresponding carrying surface), so that the extension direction of the grid lines on the inner side surface of the battery cell (that is, the side surface of the battery cell facing the corresponding carrying surface) is perpendicular to the axis of the corresponding carrying surface (that is, perpendicular to the axis of the rotating shaft), and the grid lines on the inner side surface of the battery cell are correspondingly attached to the first strip-shaped conductive connector protruding from the carrying surface in each routing groove on the corresponding carrying surface; and the battery cell on it is vacuum-adsorbed by the carrying surface so that the battery cell is stably adsorbed on the corresponding carrying surface;
  • the second strip-shaped conductive connector is wound around the circumferential surface of the welding carrier and the battery cells on the circumferential surface of the welding carrier are tightly wound, so that the second strip-shaped conductive connector is tightly fitted on the outer side of each battery cell, and then the second strip-shaped conductive connector presses the battery cell onto the first strip-shaped conductive connector protruding from the carrier surface; and when the second strip-shaped conductive connector is wound, the second strip-shaped conductive connector is correspondingly fitted with the grid lines on the outer side of the battery cell; specifically, only one second strip-shaped conductive connector can be used for winding; the second strip-shaped conductive connector can be a triangular welding strip, and when the triangular welding strip is wound, the bottom surface of the triangular welding strip is facing the outer side of the battery cell (that is, the top angle of the triangular welding strip is aligned with the outer side of the battery cell) The triangular welding strip is wound in a manner that the bottom surface of the triangular welding strip is in contact with
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are heated, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell; specifically: 1) the first strip-shaped conductive connector, the battery cell and the second strip-shaped conductive connector on the outer side of the battery cell on each carrier surface can be heated by a welding carrier, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell; 2) infrared heating can also be used (such as using linear infrared to irradiate the outer side surface of each battery cell and the second strip-shaped conductive connector on the outer side surface) to heat each battery cell and the first strip-shaped conductive connector and the second strip-shaped conductive connector on both sides of the battery cell, so that the first strip-shaped conductive connector and the second strip-shaped conductive connector are synchronously welded on each battery cell;
  • the first strip-shaped conductive connector and the second strip-shaped conductive connector are cut off, so that a small segment of the first strip-shaped conductive connector and a small segment of the second strip-shaped conductive connector remain on the battery cell, and the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector are used for connecting the battery cells where they are located in series (one end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector exceeds the battery cell where they are located, and the other end of the small segment of the first strip-shaped conductive connector and the small segment of the second strip-shaped conductive connector does not exceed the battery cell where they are located);
  • each battery cell is removed from the corresponding supporting surface of the welding carrier (after welding the strip-shaped conductive connectors on both sides of the battery cell).
  • Embodiment 4 can wind multiple rows of battery cells at one time and weld multiple rows of battery cells at one time, and weld strip-shaped conductive connectors (first strip-shaped conductive connectors and second strip-shaped conductive connectors) on both sides of multiple rows of battery cells at one time, thereby improving welding efficiency.

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Abstract

一种太阳能电池片双面焊接方法,包括如下步骤:在一焊接载具的外表面设置设有走线槽的承载面;使第一条状导电连接件在走线槽中走线;在承载面上贴放电池片;将第二条状导电连接件绷紧贴合在电池片的外侧面上,进而第二条状导电连接件将电池片压实在凸出于承载面的第一条状导电连接件上;对第一条状导电连接件和第二条状导电连接件加热,使第一条状导电连接件、第二条状导电连接件都焊接在电池片上。

Description

一种太阳能电池片双面焊接方法 技术领域
本发明涉及光伏领域,具体涉及一种太阳能电池片双面焊接方法。
背景技术
传统晶硅光伏组件制作工艺中,首先要对电池片焊接焊带并串联形成电池串。具体的,电池片形成串的方法包括:彼此相间的将焊带和电池片依次摆放,焊带的长度大约为电池片宽度的2倍,使得焊带的一半在一片电池片的正面、另一半在相邻片电池片的背面,依次形成包含多个电池片且上下面(即正负极)串联的电池串,电池串再通过吸附履带传送至焊接工位,一般使用多根压丝或压块将上下焊带与电池片压实,通过红外加热,将焊带焊接到电池片表面电极上。
电池片焊接焊带时,一般将电池片平置在平直承载面上,主要通过垂直于焊带方向的丝网或者压块与焊带压合,将焊带与电池片接触在一起完成焊接,施压部位为焊带上分散的几个点,没有施压的部位不能保证有效接触,特别是当焊带受热后,焊带未受压部位极易伸长扭曲,无法实现焊接;另外,一根压丝同时垂直交叉压合多根焊带,中部焊带受力小或者压丝悬空未形成有效压合,致使该部位焊接无效,所以电池片焊接焊带的传统焊接工艺虚焊多。
另外,在光伏组件中,具备光学优势的三角焊带等异形结构焊带应用越来越多,传统焊接工艺中通过夹取、转运、压合等方式很难确保三角焊带等异形焊带方向的一致性,很难确保三角焊带等异形焊带在整个电池片表面不翻转,所以异形焊带,特别是超细异形焊带的应用,需要有新的焊接方法和工艺来有效控制焊带的朝向一致性,以实现异形焊带的有效焊接。
另外,在光伏技术的发展过程中,更多主栅和薄片化仍然是电池组件技术发展的重要方向。电池片表面收集电流的图形为细栅,综合考虑遮光和电流传输损耗,细栅高宽比应尽量大;用于电池片串联及汇集细栅电流的图形为主栅,一定程度上,主栅数量越多,细栅银耗可以越少、图形可以越窄,且细栅热阻损失降低,使得电池片银耗降低同时效率提升,所以电池片主栅一直在朝着越来越多的方向发展。在光伏组件成本中,晶硅成本占比约一半,使用硅片越厚,晶硅材料越多,晶硅成本越高,所以薄硅片的应用也是光伏组件发展重要方向之一。
电池片主栅越多,需要的焊带数量越多、越细,目前使用最小圆丝焊带的直径已小于0.2mm,210mm宽度的电池片上焊带有30根之多,常规焊接工艺设备主要采用夹爪抓取、拉升、转运、摆放,并通过压块压合来降低焊带的偏移、滚动和扭曲。如此多而细的焊带,使用传统焊接工艺的控制难度急剧上升:1)一根焊带对应一个卷轴,卷轴数量多,卷轴位置设计、同时放线、布线、走线等难度大;2)自动化也需要配套缩短焊丝及电池的流转路径、焊带定位以及各动作间的前后相关匹配性设计;3)设备断线等故障影响也大大增加,故障后恢复难,设备维护也难。
发明概述 技术问题 问题的解决方案 技术解决方案
本发明的目的在于提供一种太阳能电池片双面焊接方法,在电池片两侧表面(即电池片正背面)焊接条状导电连接件;所述条状导电连接件包括分设在电池片两侧表面上的第一条状导电连接件、第二条状导电连接件;包括如下步骤:
在一焊接载具的外表面设置供电池片贴放的承载面,且使承载面为外凸的弧面(可以是圆弧面);在承载面上设置用于放置第一条状导电连接件的走线槽,使走线槽沿承载面的周向延伸(也即使走线槽的延伸方向与承载面的轴心垂直),且使走线槽为承载面上的通槽;
预置第一条状导电连接件,使第一条状导电连接件在走线槽中走线(走线槽限制其内的第一条状导电连接件与其同向延伸),且使第一条状导电连接件凸出于走线槽(也即使第一条状导电连接件凸出于承载面);
在承载面上贴放电池片,使电池片不超出其所在的承载面,使电池片上待焊接第一条状导电连接件的一侧表面朝向承载面(也即使电池片上待焊接第二条状导电连接件的一侧表面与承载面相背),且使电池片的内侧面(即电池片上朝向承载面的一侧表面)贴在凸出于承载面的第一条状导电连接件上;
沿承载面的周向将第二条状导电连接件绷紧贴合在电池片的外侧面(即电池片上与承载面相背的一侧表面)上,进而第二条状导电连接件将电池片压实在凸出于承载面的第一条状导电连接件上;
对第一条状导电连接件和第二条状导电连接件加热,使第一条状导电连接件、第二条状导电连接件都焊接在电池片上(完成在电池片两侧表面焊接条状导电连接件)。
优选的,若电池片的内侧面设有多个并行的栅线;则在承载面上设置多个并行的走线槽(承载面上的走线槽与承载面上所贴放电池片的内侧面栅线一一对应配合),使各走线槽都沿承载面的周向延伸(也即使各走线槽的延伸方向都与承载面的轴心垂直),且使各走线槽都为通槽;且实现预置第一条状导电连接件时,使各走线槽中都有第一条状导电连接件走线(走线槽限制其内的第一条状导电连接件与其同向延伸),且使第一条状导电连接件凸出于其所在的走线槽(也即使第一条状导电连接件凸出于承载面);且实现在承载面上贴放电池片时,使电池片内侧面栅线的延伸方向与承载面的轴心垂直,且使电池片内侧面栅线与承载面上各走线槽中凸出于承载面的第一条状导电连接件对应贴合。
优选的,若电池片的外侧面设有多个并行的栅线(电池片外侧面的栅线与电池片内侧面的栅线平行);则实现将第二条状导电连接件绷紧贴合在电池片的外侧面上时,使第二条状导电连接件与电池片外侧面的栅线对应贴合。 
优选的,实现使第一条状导电连接件、第二条状导电连接件都焊接在电池片上之后,将第一条状导电连接件和第二条状导电连接件截断,实现在电池片上残留第一条状导电连接件小段和第二条状导电连接件小段,且第一条状导电连接件小段和第二条状导电连接件小段用于其所在电池片的串接(第一条状导电连接件小段、第二条状导电连接件小段的一端超出其所在的电池片,第一条状导电连接件小段、第二条状导电连接件小段的另一端不超出其所在的电池片);然后将电池片从焊接载具的承载面上取下。
第一条状导电连接件、第二条状导电连接件的具体选择,预置第一条状导电连接件的具体实现方式,将第二条状导电连接件绷紧贴合在电池片的外侧面上的具体实现方式,对第一条状导电连接件、第二条状导电连接件加热的具体实现方式,以及其他相关的具体内容,参见实施例。
发明的有益效果 有益效果
本发明的优点和有益效果在于:
本发明能同步完成在电池片两侧表面焊接条状导电连接件,可简化电池片两侧表面焊接条状导电连接件(焊丝或焊带)的工艺,可优化电池片两侧表面条状导电连接件(焊丝或焊带)与电池片的有效接触,可提升焊接性能,提高焊接效率。
本发明焊接载具的承载面为外凸的弧面,第一条状导电连接件(焊丝或焊带)预置在沿承载面周向延伸的走线槽中,电池片贴放在承载面上,且电池片贴在凸出于承载面的第一条状导电连接件上,且第二条状导电连接件(焊丝或焊带)沿承载面的弧面周向绷紧贴合在电池片上,进而第二条状导电连接件将电池片压实在凸出于承载面的第一条状导电连接件上;焊接时,第一条状导电连接件(焊丝或焊带)、电池片和第二条状导电连接件(焊丝或焊带)在承载面上沿承载面的弧面周向弯曲,使得第一条状导电连接件、第二条状导电连接件(焊丝或焊带)都与电池片能连续充分的贴合在一起、充分受力、充分接触。
本发明可以一次缠绕多排电池片、一次焊接多排电池片、一次完成多排电池片的两侧表面焊接条状导电连接件(第一条状导电连接件、第二条状导电连接件),可提高焊接效率。
本发明还具有如下特点:
本发明虚焊少;由于第一条状导电连接件(焊丝或焊带)、第二条状导电连接件(焊丝或焊带)与电池片能连续贴合、受力均匀,焊接都是在受力完全接触的情况下完成,所以焊接完整、充分,可大大降低虚焊情况。
本发明第一条状导电连接件(焊丝或焊带)、第二条状导电连接件(焊丝或焊带)的卷轴使用数量少、易控制;
本发明可以仅采用一条第一条状导电连接件进行焊接载具上所有走线槽的缠绕走线,焊接载具上所有走线槽的第一条状导电连接件(焊丝或焊带)都来源于同一卷轴;本发明还可以仅采用一条第二条状导电连接件进行焊接载具上所有电池片的缠绕,焊接载具上所有电池片的第二条状导电连接件(焊丝或焊带)都来源于同一卷轴;所以本发明卷轴数量大大降低,进而可使设备空间设计简化,第一条状导电连接件(焊丝或焊带)、第二条状导电连接件(焊丝或焊带)断线、偏移等故障维护以及换线等操作也简化很多。
本发明缠绕过程中,第一条状导电连接件(焊丝或焊带)、第二条状导电连接件(焊丝或焊带)偏移少;第一条状导电连接件(焊丝或焊带)从卷轴出线后可直接到焊接载具的侧周面,并沿走线槽走线缠绕且缠紧焊接载具侧周面,可完全省去第一条状导电连接件(焊丝或焊带)裁切、夹取、拉伸、转运等常规动作,几乎完全杜绝了第一条状导电连接件(焊丝或焊带)的偏移可能;第二条状导电连接件(焊丝或焊带)从卷轴出线后可直接到电池片,并与电池片上的栅线对准并绷紧固定,可完全省去第二条状导电连接件(焊丝或焊带)裁切、夹取、拉伸、转运等常规动作,几乎完全杜绝了第二条状导电连接件(焊丝或焊带)的偏移可能。
本发明单个电池片上一次可焊接形成第一条状导电连接件小段和第二条状导电连接件小段(第一条状导电连接件小段和第二条状导电连接件小段用于其所在电池片的串接)的数量多,可在单个电池片一次焊接并形成上百条第一条状导电连接件小段和第二条状导电连接件小段。理论上,单个电池片上第一条状导电连接件小段的最终数量与缠绕第一条状导电连接件时焊接载具侧周面的旋转圈数相等,单个电池片上第二条状导电连接件小段的最终数量与缠绕第二条状导电连接件时焊接载具侧周面的旋转圈数相等;易于控制和实施。
本发明可应用于需要识别方向的异形结构焊带(如三角焊带)焊接。第一条状导电连接件采用三角焊带缠绕时,走线槽(V形槽)能支撑在其内走线的三角焊带保持底面朝外,以防止三角焊带在走线槽内走线时扭转,可以最终使三角焊带的底面朝向电池片的内侧面,以使第一条状导电连接件(三角焊带)最终稳定贴合在电池片内侧面的对应栅线上。第二条状导电连接件采用三角焊带缠绕时,承载面(外凸的弧面)能自动修正三角焊带顶角方向,使得三角焊带顶角朝上、底面朝下。本发明可实现如三角焊带等异形焊带的焊接,三角焊带不易翻转、良率高。
附图说明
图1至图5是本发明的示意图。
实施该发明的最佳实施例 本发明实施方式
下面结合附图和实施例,对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。
本发明提供一种太阳能电池片双面焊接方法,在电池片两侧表面(即电池片正背面)焊接条状导电连接件;所述条状导电连接件包括分设在电池片两侧表面上的第一条状导电连接件、第二条状导电连接件;包括如下步骤:
在一焊接载具的外表面设置供电池片贴放的承载面,且使承载面为外凸的弧面(可以是圆弧面),且使弧面的弧高不大于弧长的四分之一;在承载面上设置用于放置第一条状导电连接件的走线槽,使走线槽沿承载面的周向延伸(也即使走线槽的延伸方向与承载面的轴心垂直),且使走线槽为承载面上的通槽;
预置第一条状导电连接件,使第一条状导电连接件在走线槽中走线(走线槽限制其内的第一条状导电连接件与其同向延伸),且使第一条状导电连接件凸出于走线槽(也即使第一条状导电连接件凸出于承载面);
然后在承载面上贴放电池片,使电池片不超出其所在的承载面,使电池片上待焊接第一条状导电连接件的一侧表面朝向承载面(也即使电池片上待焊接第二条状导电连接件的一侧表面与承载面相背),且使电池片的内侧面(即电池片上朝向承载面的一侧表面)贴在凸出于承载面的第一条状导电连接件上;
然后沿承载面的周向将第二条状导电连接件绷紧贴合在电池片的外侧面(即电池片上与承载面相背的一侧表面)上,进而第二条状导电连接件将电池片压实在凸出于承载面的第一条状导电连接件上;
然后通过直接加热、红外加热或热风加热等方式,实现对第一条状导电连接件和第二条状导电连接件加热,使第一条状导电连接件、第二条状导电连接件都焊接在电池片上;
然后将第一条状导电连接件和第二条状导电连接件截断,实现在电池片上残留第一条状导电连接件小段和第二条状导电连接件小段,且第一条状导电连接件小段和第二条状导电连接件小段用于其所在电池片的串接(第一条状导电连接件小段、第二条状导电连接件小段的一端超出其所在的电池片,第一条状导电连接件小段、第二条状导电连接件小段的另一端不超出其所在的电池片);
然后将电池片从焊接载具的承载面上取下(完成在电池片两侧表面焊接条状导电连接件)。
具体的:
1)可以承载面具有真空吸附功能(如承载面可以均布抽气口,通过抽气口进行真空吸附);实现在承载面上贴放电池片时,通过承载面对电池片进行真空吸附,以使电池片稳定吸附在承载面上。
2)可以使焊接载具具有加热功能,通过焊接载具对承载面上的第一条状导电连接件、电池片以及电池片外侧面上的第二条状导电连接件进行加热。
3)若电池片的内侧面设有多个并行的栅线;
则在承载面上设置多个并行的走线槽(使承载面上的走线槽与承载面上所贴放电池片的内侧面栅线一一对应配合),使各走线槽都沿承载面的周向延伸(也即使各走线槽的延伸方向都与承载面的轴心垂直),且使各走线槽都为通槽;
且实现预置第一条状导电连接件时,使各走线槽中都有第一条状导电连接件走线(走线槽限制其内的第一条状导电连接件与其同向延伸),且使第一条状导电连接件凸出于其所在的走线槽(也即使第一条状导电连接件凸出于承载面);
且实现在承载面上贴放电池片时,使电池片内侧面栅线的延伸方向与承载面的轴心垂直,且使电池片内侧面栅线与承载面上各走线槽中凸出于承载面的第一条状导电连接件对应贴合。
4)若电池片的外侧面设有多个并行的栅线(电池片外侧面的栅线可以与电池片内侧面的栅线平行);
则实现将第二条状导电连接件绷紧贴合在电池片的外侧面上时,使第二条状导电连接件与电池片外侧面的栅线对应贴合。
5)条状导电连接件(第一条状导电连接件、第二条状导电连接件)可以采用焊丝或焊带;
若条状导电连接件(第一条状导电连接件、第二条状导电连接件)具有用于与电池片焊接的平直底面(如第一条状导电连接件、第二条状导电连接件的横截面形状为三角形或矩形);
则使走线槽能支撑在其内走线的第一条状导电连接件保持平直底面与承载面相背,以防止第一条状导电连接件在走线槽内走线时扭转(如使走线槽的横截面形状与第一条状导电连接件的横截面形状对应匹配,并使第一条状导电连接件嵌入走线槽中走线);且实现预置第一条状导电连接件时,使第一条状导电连接件的平直底面与承载面相背设置,以使第一条状导电连接件最终能稳定贴合在电池片的内侧面上;
比如,第一条状导电连接件可以采用三角焊带;则使走线槽为可供三角焊带顶角嵌入的V形槽;第一条状导电连接件在走线槽中走线时,将第一条状导电连接件的顶角嵌入走线槽,且使第一条状导电连接件的的底面凸出于走线槽;
且实现将第二条状导电连接件绷紧贴合在电池片的外侧面上时,使第二条状导电连接件的平直底面朝向电池片的外侧面,以使第二条状导电连接件稳定贴合在电池片的外侧面上;
比如,第二条状导电连接件可以采用三角焊带;则实现将第二条状导电连接件(三角焊带)绷紧贴合在电池片的外侧面上时,使三角焊带的底面朝向电池片的外侧面(也即使三角焊带的顶角与电池片的外侧面相背),以使第二条状导电连接件(三角焊带)稳定贴合在电池片的外侧面上。
6)如图1所示,可以通过使第二条状导电连接件沿承载面的周向跨过电池片,并将第二条状导电连接件位于电池片两侧外部的区段向焊接载具和/或承载面拉紧的方式,实现将第二条状导电连接件绷紧贴合在电池片的外侧面上。
7)如图2至图5所示,还可以使焊接载具设有转轴,且使焊接载具的外表面包括围绕转轴的侧周面;使承载面位于焊接载具的侧周面上,并使承载面的轴心与转轴的轴心平行或共线;且通过使第一条状导电连接件沿走线槽走线缠绕并缠紧焊接载具侧周面的方式,实现预置第一条状导电连接件;还通过使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片的方式,实现将第二条状导电连接件绷紧贴合在电池片的外侧面上;
另外,若使转轴的轴心位于焊接载具的中心线上;则实现使第一条状导电连接件沿走线槽缠绕并缠紧焊接载具侧周面时,使焊接载具侧周面围绕转轴的轴心转动,以方便第一条状导电连接件的缠绕;且实现使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片时,使焊接载具侧周面围绕转轴的轴心转动,以方便第二条状导电连接件的缠绕;
而且,可以仅采用一条第一条状导电连接件,实现使第一条状导电连接件沿走线槽走线缠绕并缠紧焊接载具侧周面;可以仅采用一条第二条状导电连接件,实现使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片;
更优选的,可以在焊接载具侧周面上设置多排设有走线槽的承载面,使各排承载面沿焊接载具侧周面的周向依次设置,使同一排的承载面沿转轴的轴向依次设置,并使各承载面的轴心与转轴的轴心平行或共线;更具体的,可以使多排承载面沿焊接载具侧周面的周向均布,甚至可以使各承载面在焊接载具的侧周面上均布;在多排承载面上分别贴放电池片(多排承载面预先缠绕第一条状导电连接件),以便第二条状导电连接件可一次缠绕多排电池片,最终可一次焊接多排电池片(同步完成在多排电池片焊接第一条状导电连接件、第二条状导电连接件),可提高焊接效率。
本发明采用缠绕第一条状导电连接件、第二条状导电连接件方式的具体实施例如下:
实施例1
如图2所示,本实施例提供提供一种太阳能电池片双面焊接方法,在电池片两侧表面(即电池片正背面)焊接条状导电连接件;所述条状导电连接件包括分设在电池片两侧表面上的第一条状导电连接件、第二条状导电连接件;且电池片的内侧面设有多个并行的栅线;电池片的外侧面也设有多个并行的栅线,且电池片外侧面的栅线与电池片内侧面的栅线平行);
所述太阳能电池片双面焊接方法,包括如下步骤:
设置一具有转轴的焊接载具,使转轴的轴心位于焊接载具的中心线上,且使焊接载具具有围绕转轴的侧周面;在焊接载具的侧周面上设置一对供电池片贴放的承载面,使该对承载面都为外凸的弧面(可以是圆弧面),使该对承载面对称设置,并使该对承载面的轴心都与转轴的轴心平行或共线;在该对承载面上分别设置多个并行的走线槽(使承载面上的走线槽与承载面上所贴放电池片的内侧面栅线一一对应配合,可以使同一承载面上的走线槽等间隔设置),可以使各走线槽为绕焊接载具侧周面一圈且与转轴垂直的环形槽;走线槽供第一条状导电连接件缠绕焊接载具侧周面时走线(走线槽能限制在其内走线的第一条状导电连接件与其同向延伸);使该对承载面分别具有真空吸附功能(如该对承载面分别均布抽气口,可以通过抽气口进行真空吸附);使焊接载具具有可以加热该对承载面的加热功能;
然后通过使第一条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面的方式,实现预置第一条状导电连接件;且使各走线槽中都有第一条状导电连接件走线,并使第一条状导电连接件凸出于各走线槽(也即使第一条状导电连接件凸出于各承载面);具体的,可以仅采用一条第一条状导电连接件进行缠绕;第一条状导电连接件可以采用扁平焊带,且缠绕扁平焊带时,使扁平焊带的底面朝外,可以最终使扁平焊带的底面朝向电池片的内侧面,以使扁平焊带最终稳定贴合在电池片内侧面的对应栅线上;且缠绕第一条状导电连接件时,使焊接载具侧周面围绕转轴的轴心转动,可以方便第一条状导电连接件的缠绕;更具体的,可以通过外部机构(如电机)驱动转轴绕自身轴心转动,并通过转轴带动焊接载具整体转动,进而实现使焊接载具侧周面围绕转轴的轴心转动;
然后在该对承载面上分别贴放电池片,使电池片不超出其所贴合的承载面,使电池片上待焊接第一条状导电连接件的一侧表面朝向对应的承载面(也即使电池片上待焊接第二条状导电连接件的一侧表面与对应的承载面相背),使电池片内侧面(即电池片上朝向对应承载面的一侧表面)栅线的延伸方向与对应承载面的轴心垂直(也即与转轴的轴心垂直),且使电池片内侧面栅线与对应承载面上各走线槽中凸出于承载面的第一条状导电连接件对应贴合;且通过承载面对其上的电池片进行真空吸附,以使电池片稳定吸附在对应的承载面上;
然后通过使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片的方式,实现将第二条状导电连接件绷紧贴合在各电池片的外侧面上,进而第二条状导电连接件将电池片压实在凸出于承载面的第一条状导电连接件上;且缠绕第二条状导电连接件时,使第二条状导电连接件与电池片外侧面的栅线对应贴合;具体的,可以仅采用一条第二条状导电连接件进行缠绕;第二条状导电连接件可以采用扁平焊带,且缠绕扁平焊带时,使扁平焊带的底面朝向电池片的外侧面,以使扁平焊带稳定贴合在电池片外侧面的对应栅线上;且缠绕第二条状导电连接件时,使焊接载具侧周面围绕转轴的轴心转动,可以方便第二条状导电连接件的缠绕;更具体的,可以通过外部机构(如电机)驱动转轴绕自身轴心转动,并通过转轴带动焊接载具整体转动,进而实现使焊接载具侧周面围绕转轴的轴心转动;
然后对第一条状导电连接件和第二条状导电连接件加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;具体的:1)可以通过焊接载具对各承载面上的第一条状导电连接件、电池片以及电池片外侧面上的第二条状导电连接件进行加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;2)还可以通过红外加热方式(如使用线状红外照射各电池片的外侧面以及外侧面上的第二条状导电连接件),实现对各电池片以及电池片两侧表面的第一条状导电连接件、第二条状导电连接件进行加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;
然后将第一条状导电连接件和第二条状导电连接件截断,实现在电池片上残留第一条状导电连接件小段和第二条状导电连接件小段,且第一条状导电连接件小段和第二条状导电连接件小段用于其所在电池片的串接(第一条状导电连接件小段、第二条状导电连接件小段的一端超出其所在的电池片,第一条状导电连接件小段、第二条状导电连接件小段的另一端不超出其所在的电池片);
然后将各电池片分别从焊接载具的对应承载面上取下(完成在电池片两侧表面焊接条状导电连接件)。
实施例2
如图3所示,本实施例提供提供一种太阳能电池片双面焊接方法,在电池片两侧表面(即电池片正背面)焊接条状导电连接件;所述条状导电连接件包括分设在电池片两侧表面上的第一条状导电连接件、第二条状导电连接件;且电池片的内侧面设有多个并行的栅线;电池片的外侧面也设有多个并行的栅线,且电池片外侧面的栅线与电池片内侧面的栅线平行);
所述太阳能电池片双面焊接方法,包括如下步骤:
设置一具有转轴的焊接载具,使转轴的轴心位于焊接载具的中心线上;使焊接载具具有围绕转轴的侧周面,且使焊接载具的侧周面由多个可供电池片贴放的承载面围成(焊接载具的主体可以是与转轴共轴心的棱柱);使该多个承载面都为外凸的弧面(可以是圆弧面),并使该多个承载面的轴心都与转轴的轴心平行或共线;在该多个承载面上分别设置多个并行的走线槽(使承载面上的走线槽与承载面上所贴放电池片的内侧面栅线一一对应配合,可以使同一承载面上的走线槽等间隔设置),可以使各走线槽为绕焊接载具侧周面一圈且与转轴垂直的环形槽;走线槽供第一条状导电连接件缠绕焊接载具侧周面时走线(走线槽能限制在其内走线的第一条状导电连接件与其同向延伸);使该多个承载面分别具有真空吸附功能(如该多个承载面分别均布抽气口,可以通过抽气口进行真空吸附);使焊接载具具有可以加热该多个承载面的加热功能;
然后通过使第一条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面的方式,实现预置第一条状导电连接件;且使各走线槽中都有第一条状导电连接件走线,并使第一条状导电连接件凸出于各走线槽(也即使第一条状导电连接件凸出于各承载面);具体的,可以仅采用一条第一条状导电连接件进行缠绕;第一条状导电连接件可以采用圆丝焊带;且缠绕第一条状导电连接件时,使焊接载具侧周面围绕转轴的轴心转动,可以方便第一条状导电连接件的缠绕;更具体的,可以通过外部机构(如电机)驱动转轴绕自身轴心转动,并通过转轴带动焊接载具整体转动,进而实现使焊接载具侧周面围绕转轴的轴心转动;
然后在该多个承载面上分别贴放电池片,使电池片不超出其所贴合的承载面,使电池片上待焊接第一条状导电连接件的一侧表面朝向对应的承载面(也即使电池片上待焊接第二条状导电连接件的一侧表面与对应的承载面相背),使电池片内侧面(即电池片上朝向对应承载面的一侧表面)栅线的延伸方向与对应承载面的轴心垂直(也即与转轴的轴心垂直),且使电池片内侧面栅线与对应承载面上各走线槽中凸出于承载面的第一条状导电连接件对应贴合;且通过承载面对其上的电池片进行真空吸附,以使电池片稳定吸附在对应的承载面上;
然后通过使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片的方式,实现将第二条状导电连接件绷紧贴合在各电池片的外侧面上,进而第二条状导电连接件将电池片压实在凸出于承载面的第一条状导电连接件上;且缠绕第二条状导电连接件时,使第二条状导电连接件与电池片外侧面的栅线对应贴合;具体的,可以仅采用一条第二条状导电连接件进行缠绕;第二条状导电连接件可以采用圆丝焊带;且缠绕第二条状导电连接件时,使焊接载具侧周面围绕转轴的轴心转动,可以方便第二条状导电连接件的缠绕;更具体的,可以通过外部机构(如电机)驱动转轴绕自身轴心转动,并通过转轴带动焊接载具整体转动,进而实现使焊接载具侧周面围绕转轴的轴心转动;
然后对第一条状导电连接件和第二条状导电连接件加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;具体的:1)可以通过焊接载具对各承载面上的第一条状导电连接件、电池片以及电池片外侧面上的第二条状导电连接件进行加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;2)还可以通过热风加热方式(如使用热风吹扫各电池片的外侧面以及外侧面上的第二条状导电连接件),实现对各电池片以及电池片两侧表面的第一条状导电连接件、第二条状导电连接件进行加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;
然后将第一条状导电连接件和第二条状导电连接件截断,实现在电池片上残留第一条状导电连接件小段和第二条状导电连接件小段,且第一条状导电连接件小段和第二条状导电连接件小段用于其所在电池片的串接(第一条状导电连接件小段、第二条状导电连接件小段的一端超出其所在的电池片,第一条状导电连接件小段、第二条状导电连接件小段的另一端不超出其所在的电池片);
然后将各电池片分别从焊接载具的对应承载面上取下(完成在电池片两侧表面焊接条状导电连接件)。
实施例3
如图4所示,本实施例提供提供一种太阳能电池片双面焊接方法,在电池片两侧表面(即电池片正背面)焊接条状导电连接件;所述条状导电连接件包括分设在电池片两侧表面上的第一条状导电连接件、第二条状导电连接件;且电池片的内侧面设有多个并行的栅线;电池片的外侧面也设有多个并行的栅线,且电池片外侧面的栅线与电池片内侧面的栅线平行);
所述太阳能电池片双面焊接方法,包括如下步骤:
设置一具有转轴的焊接载具,使转轴的轴心位于焊接载具的中心线上;使焊接载具具有围绕转轴的侧周面,且使焊接载具的侧周面为与转轴共轴心的圆周面(焊接载具的主体可以是与转轴共轴心的圆柱);在焊接载具的侧周面上并沿侧周面周向依次间隔划分出多个弧面区域,且使该多个弧面区域沿焊接载具侧周面的周向均布;各弧面区域分别为可供电池片贴放的承载面;在各承载面上分别设置多个并行的走线槽(使承载面上的走线槽与承载面上所贴放电池片的内侧面栅线一一对应配合,可以使同一承载面上的走线槽等间隔设置),使各走线槽为绕焊接载具侧周面一圈且与转轴共轴心的环形槽,且使各走线槽为可供三角焊带顶角嵌入的V形槽;走线槽供第一条状导电连接件(采用三角焊带)缠绕焊接载具侧周面时走线(走线槽能限制在其内走线的第一条状导电连接件/三角焊带与其同向延伸);使各承载面分别具有真空吸附功能(如各承载面分别均布抽气口,可以通过抽气口进行真空吸附);使焊接载具具有可以加热各承载面的加热功能;
然后通过使第一条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面的方式,实现预置第一条状导电连接件;且使各走线槽中都有第一条状导电连接件走线,并使第一条状导电连接件凸出于各走线槽(也即使第一条状导电连接件凸出于各承载面);具体的,可以仅采用一条第一条状导电连接件进行缠绕;第一条状导电连接件可以采用三角焊带,且缠绕三角焊带时,将三角焊带的顶角嵌入走线槽(V形槽),并使三角焊带的平置底面凸出于走线槽;走线槽(V形槽)能支撑在其内走线的三角焊带保持底面朝外,以防止三角焊带在走线槽内走线时扭转,可以最终使三角焊带的底面朝向电池片的内侧面,以使第一条状导电连接件(三角焊带)最终稳定贴合在电池片内侧面的对应栅线上;且缠绕第一条状导电连接件时,使焊接载具侧周面围绕转轴的轴心转动,可以方便第一条状导电连接件的缠绕;更具体的,可以通过外部机构(如电机)驱动转轴绕自身轴心转动,并通过转轴带动焊接载具整体转动,进而实现使焊接载具侧周面围绕转轴的轴心转动;
然后在各承载面上分别贴放电池片,使电池片不超出其所贴合的承载面,使电池片上待焊接第一条状导电连接件的一侧表面朝向对应的承载面(也即使电池片上待焊接第二条状导电连接件的一侧表面与对应的承载面相背),使电池片内侧面(即电池片上朝向对应承载面的一侧表面)栅线的延伸方向与对应承载面的轴心垂直(也即与转轴的轴心垂直),且使电池片内侧面栅线与对应承载面上各走线槽中凸出于承载面的第一条状导电连接件对应贴合;且通过承载面对其上的电池片进行真空吸附,以使电池片稳定吸附在对应的承载面上;
然后通过使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片的方式,实现将第二条状导电连接件绷紧贴合在各电池片的外侧面上,进而第二条状导电连接件将电池片压实在凸出于承载面的第一条状导电连接件上;且缠绕第二条状导电连接件时,使第二条状导电连接件与电池片外侧面的栅线对应贴合;具体的,可以仅采用一条第二条状导电连接件进行缠绕;第二条状导电连接件可以采用三角焊带,且缠绕三角焊带时,使三角焊带的底面朝向电池片的外侧面(也即使三角焊带的顶角与电池片的外侧面相背),以使三角焊带稳定贴合在电池片外侧面的对应栅线上;且在三角焊带缠绕过程中,三角焊带的底面贴合在电池片外侧面的状态是最稳定的,所以三角焊带在缠绕过程中,可以自动修正顶角方向,使得顶角朝上、底面朝下,实现与电池片外侧面稳定贴合;且缠绕第二条状导电连接件时,使焊接载具侧周面围绕转轴的轴心转动,可以方便第二条状导电连接件的缠绕;更具体的,可以通过外部机构(如电机)驱动转轴绕自身轴心转动,并通过转轴带动焊接载具整体转动,进而实现使焊接载具侧周面围绕转轴的轴心转动;
然后对第一条状导电连接件和第二条状导电连接件加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;具体的:1)可以通过焊接载具对各承载面上的第一条状导电连接件、电池片以及电池片外侧面上的第二条状导电连接件进行加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;2)还可以通过热风加热方式(如使用热风吹扫各电池片的外侧面以及外侧面上的第二条状导电连接件),实现对各电池片以及电池片两侧表面的第一条状导电连接件、第二条状导电连接件进行加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;
然后将第一条状导电连接件和第二条状导电连接件截断,实现在电池片上残留第一条状导电连接件小段和第二条状导电连接件小段,且第一条状导电连接件小段和第二条状导电连接件小段用于其所在电池片的串接(第一条状导电连接件小段、第二条状导电连接件小段的一端超出其所在的电池片,第一条状导电连接件小段、第二条状导电连接件小段的另一端不超出其所在的电池片);
然后将各电池片分别从焊接载具的对应承载面上取下(完成在电池片两侧表面焊接条状导电连接件)。
实施例4
如图5所示,本实施例提供提供一种太阳能电池片双面焊接方法,在电池片两侧表面(即电池片正背面)焊接条状导电连接件;所述条状导电连接件包括分设在电池片两侧表面上的第一条状导电连接件、第二条状导电连接件;且电池片的内侧面设有多个并行的栅线;电池片的外侧面也设有多个并行的栅线,且电池片外侧面的栅线与电池片内侧面的栅线平行);
所述太阳能电池片双面焊接方法,包括如下步骤:
设置一具有转轴的焊接载具,使转轴的轴心位于焊接载具的中心线上;使焊接载具具有围绕转轴的侧周面,且使焊接载具的侧周面为与转轴共轴心的圆周面(焊接载具的主体可以是与转轴共轴心的圆柱);在焊接载具的侧周面上划分出多排弧面区域,使各排弧面区域沿焊接载具侧周面的周向依次间隔设置,使同一排的弧面区域沿转轴的轴向依次间隔设置;各弧面区域分别为可供电池片贴放的承载面;在各承载面上分别设置多个并行的走线槽(使承载面上的走线槽与承载面上所贴放电池片的内侧面栅线一一对应配合,可以使同一承载面上的走线槽等间隔设置),使各走线槽为绕焊接载具侧周面一圈且与转轴共轴心的环形槽,且使各走线槽为可供三角焊带顶角嵌入的V形槽;走线槽供第一条状导电连接件(采用三角焊带)缠绕焊接载具侧周面时走线(走线槽能限制在其内走线的第一条状导电连接件/三角焊带与其同向延伸);使各承载面分别具有真空吸附功能(如各承载面分别均布抽气口,可以通过抽气口进行真空吸附);使焊接载具具有可以加热各承载面的加热功能;
然后通过使第一条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面的方式,实现预置第一条状导电连接件;且使各走线槽中都有第一条状导电连接件走线,并使第一条状导电连接件凸出于各走线槽(也即使第一条状导电连接件凸出于各承载面);具体的,可以仅采用一条第一条状导电连接件进行缠绕;第一条状导电连接件可以采用三角焊带,且缠绕三角焊带时,将三角焊带的顶角嵌入走线槽(V形槽),并使三角焊带的平置底面凸出于走线槽;走线槽(V形槽)能支撑在其内走线的三角焊带保持底面朝外,以防止三角焊带在走线槽内走线时扭转,可以最终使三角焊带的底面朝向电池片的内侧面,以使第一条状导电连接件(三角焊带)最终稳定贴合在电池片内侧面的对应栅线上;且缠绕第一条状导电连接件时,使焊接载具侧周面围绕转轴的轴心转动,可以方便第一条状导电连接件的缠绕;更具体的,可以通过外部机构(如电机)驱动转轴绕自身轴心转动,并通过转轴带动焊接载具整体转动,进而实现使焊接载具侧周面围绕转轴的轴心转动;
然后在各承载面上分别贴放电池片,使电池片不超出其所贴合的承载面,使电池片上待焊接第一条状导电连接件的一侧表面朝向对应的承载面(也即使电池片上待焊接第二条状导电连接件的一侧表面与对应的承载面相背),使电池片内侧面(即电池片上朝向对应承载面的一侧表面)栅线的延伸方向与对应承载面的轴心垂直(也即与转轴的轴心垂直),且使电池片内侧面栅线与对应承载面上各走线槽中凸出于承载面的第一条状导电连接件对应贴合;且通过承载面对其上的电池片进行真空吸附,以使电池片稳定吸附在对应的承载面上;
然后通过使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片的方式,实现将第二条状导电连接件绷紧贴合在各电池片的外侧面上,进而第二条状导电连接件将电池片压实在凸出于承载面的第一条状导电连接件上;且缠绕第二条状导电连接件时,使第二条状导电连接件与电池片外侧面的栅线对应贴合;具体的,可以仅采用一条第二条状导电连接件进行缠绕;第二条状导电连接件可以采用三角焊带,且缠绕三角焊带时,使三角焊带的底面朝向电池片的外侧面(也即使三角焊带的顶角与电池片的外侧面相背),以使三角焊带稳定贴合在电池片外侧面的对应栅线上;且在三角焊带缠绕过程中,三角焊带的底面贴合在电池片外侧面的状态是最稳定的,所以三角焊带在缠绕过程中,可以自动修正顶角方向,使得顶角朝上、底面朝下,实现与电池片外侧面稳定贴合;且缠绕第二条状导电连接件时,使焊接载具侧周面围绕转轴的轴心转动,可以方便第二条状导电连接件的缠绕;更具体的,可以通过外部机构(如电机)驱动转轴绕自身轴心转动,并通过转轴带动焊接载具整体转动,进而实现使焊接载具侧周面围绕转轴的轴心转动;
然后对第一条状导电连接件和第二条状导电连接件加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;具体的:1)可以通过焊接载具对各承载面上的第一条状导电连接件、电池片以及电池片外侧面上的第二条状导电连接件进行加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;2)还可以通过红外加热方式(如使用线状红外照射各电池片的外侧面以及外侧面上的第二条状导电连接件),实现对各电池片以及电池片两侧表面的第一条状导电连接件、第二条状导电连接件进行加热,使第一条状导电连接件、第二条状导电连接件同步焊接在各电池片上;
然后将第一条状导电连接件和第二条状导电连接件截断,实现在电池片上残留第一条状导电连接件小段和第二条状导电连接件小段,且第一条状导电连接件小段和第二条状导电连接件小段用于其所在电池片的串接(第一条状导电连接件小段、第二条状导电连接件小段的一端超出其所在的电池片,第一条状导电连接件小段、第二条状导电连接件小段的另一端不超出其所在的电池片);
然后将各电池片分别从焊接载具的对应承载面上取下(完成在电池片两侧表面焊接条状导电连接件)。
实施例4可以一次缠绕多排电池片和一次焊接多排电池片,一次完成多排电池片的两侧表面焊接条状导电连接件(第一条状导电连接件、第二条状导电连接件),可提高焊接效率。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。

Claims (27)

  1.  一种太阳能电池片双面焊接方法,其特征在于,包括如下步骤:
    在一焊接载具的外表面设置供电池片贴放的承载面,且使承载面为外凸的弧面;在承载面上设置用于放置第一条状导电连接件的走线槽,使走线槽沿承载面的周向延伸,且使走线槽为通槽;
    预置第一条状导电连接件,使第一条状导电连接件在走线槽中走线,且使第一条状导电连接件凸出于走线槽;
    在承载面上贴放电池片,使电池片上待焊接第一条状导电连接件的一侧表面朝向承载面,且使电池片的内侧面贴在第一条状导电连接件上;
    将第二条状导电连接件绷紧贴合在电池片的外侧面上;
    对第一条状导电连接件和第二条状导电连接件加热,使第一条状导电连接件、第二条状导电连接件都焊接在电池片上。
  2.  根据权利要求1所述的太阳能电池片双面焊接方法,其特征在于,所述电池片的内侧面设有多个并行的栅线;
    在承载面上设置多个并行的走线槽,使各走线槽都沿承载面的周向延伸,且使各走线槽都为通槽;
    实现预置第一条状导电连接件时,使各走线槽中都有第一条状导电连接件走线,且使第一条状导电连接件凸出于其所在的走线槽;
    实现在承载面上贴放电池片时,使电池片内侧面栅线的延伸方向与承载面的轴心垂直,且使电池片内侧面栅线与承载面上各走线槽中的第一条状导电连接件对应贴合。
  3.  根据权利要求2所述的太阳能电池片双面焊接方法,其特征在于,所述电池片的外侧面设有多个并行的栅线;
    实现将第二条状导电连接件绷紧贴合在电池片的外侧面上时,使第二条状导电连接件与电池片外侧面的栅线对应贴合。
  4.  根据权利要求1、2或3所述的太阳能电池片双面焊接方法,其特征在于,通过使第二条状导电连接件沿承载面的周向跨过电池片,并将第二条状导电连接件位于电池片两侧外部的区段向焊接载具拉紧的方式,实现将第二条状导电连接件绷紧贴合在电池片的外侧面上。
  5.  根据权利要求1、2或3所述的太阳能电池片双面焊接方法,其特征在于,使焊接载具设有转轴,且使焊接载具的外表面包括围绕转轴的侧周面;使承载面位于焊接载具的侧周面上,并使承载面的轴心与转轴的轴心平行或共线;
    通过使第一条状导电连接件沿走线槽走线缠绕并缠紧焊接载具侧周面的方式,实现预置第一条状导电连接件。
  6.  根据权利要求5所述的太阳能电池片双面焊接方法,其特征在于,通过使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片的方式,实现将第二条状导电连接件绷紧贴合在电池片的外侧面上。
  7.  根据权利要求6所述的太阳能电池片双面焊接方法,其特征在于,使转轴的轴心位于焊接载具的中心线上。
  8.  根据权利要求6所述的太阳能电池片双面焊接方法,其特征在于,实现使第一条状导电连接件沿走线槽缠绕并缠紧焊接载具侧周面时,使焊接载具侧周面围绕转轴的轴心转动;
    实现使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片时,使焊接载具侧周面围绕转轴的轴心转动。
  9.  根据权利要求6所述的太阳能电池片双面焊接方法,其特征在于,在焊接载具侧周面上设置至少两个设有走线槽的承载面,并使各承载面的轴心与转轴的轴心平行或共线;
    通过使第一条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面的方式,实现预置第一条状导电连接件;且使各走线槽中都有第一条状导电连接件走线;
    在各承载面上分别贴放电池片,使电池片上待焊接第一条状导电连接件的一侧表面朝向对应的承载面,且使电池片的内侧面贴在第一条状导电连接件上;
    通过使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片的方式,实现将第二条状导电连接件绷紧贴合在各电池片的外侧面上;
    对第一条状导电连接件和第二条状导电连接件加热,使第一条状导电连接件、第二条状导电连接件焊接在各电池片上。
  10.  根据权利要求9所述的太阳能电池片双面焊接方法,其特征在于,在焊接载具侧周面上设置多个设有走线槽的承载面,使各承载面沿焊接载具侧周面的周向依次设置。
  11.  根据权利要求10所述的太阳能电池片双面焊接方法,其特征在于,使各承载面沿焊接载具侧周面的周向均布。
  12.  根据权利要求9所述的太阳能电池片双面焊接方法,其特征在于,在焊接载具侧周面上设置多排设有走线槽的承载面,使各排承载面沿焊接载具侧周面的周向依次设置,使同一排的承载面沿转轴的轴向依次设置,并使各承载面的轴心与转轴的轴心平行或共线。
  13.  根据权利要求12所述的太阳能电池片双面焊接方法,其特征在于,使多排承载面沿焊接载具侧周面的周向均布。
  14.  根据权利要求13所述的太阳能电池片双面焊接方法,其特征在于,使各承载面在焊接载具的侧周面上均布。
  15.  根据权利要求9所述的太阳能电池片双面焊接方法,其特征在于,使焊接载具的侧周面由多个承载面围成。
  16.  根据权利要求15所述的太阳能电池片双面焊接方法,其特征在于,使焊接载具的侧周面与转轴共轴心。
  17.  根据权利要求9所述的太阳能电池片双面焊接方法,其特征在于,使焊接载具的侧周面为与转轴共轴心的圆周面。
  18.  根据权利要求17所述的太阳能电池片双面焊接方法,其特征在于,使走线槽为与转轴共轴心的环形槽。
  19.  根据权利要求6所述的太阳能电池片双面焊接方法,其特征在于,仅采用一条第一条状导电连接件,实现使第一条状导电连接件沿走线槽走线缠绕并缠紧焊接载具侧周面;
    仅采用一条第二条状导电连接件,实现使第二条状导电连接件沿焊接载具侧周面周向缠绕并缠紧焊接载具侧周面上电池片。
  20.  根据权利要求1所述的太阳能电池片双面焊接方法,其特征在于,所述第一条状导电连接件、第二条状导电连接件采用焊丝或焊带。
  21.  根据权利要求1所述的太阳能电池片双面焊接方法,其特征在于,所述第一条状导电连接件、第二条状导电连接件具有用于与电池片焊接的平直底面;
    实现预置第一条状导电连接件时,使第一条状导电连接件的平直底面与承载面相背设置;
    实现将第二条状导电连接件绷紧贴合在电池片的外侧面上时,使第二条状导电连接件的平直底面朝向电池片的外侧面。
  22.  根据权利要求21所述的太阳能电池片双面焊接方法,其特征在于,使走线槽能支撑在其内走线的第一条状导电连接件保持平直底面与承载面相背。
  23.  根据权利要求22所述的太阳能电池片双面焊接方法,其特征在于,所述第一条状导电连接件采用三角焊带;使走线槽为V形槽;第一条状导电连接件在走线槽中走线时,将第一条状导电连接件的顶角嵌入走线槽,且使第一条状导电连接件的的底面凸出于走线槽。
  24.  根据权利要求1所述的太阳能电池片双面焊接方法,其特征在于,通过直接加热、红外加热或热风加热方式,实现对第一条状导电连接件和第二条状导电连接件加热。
  25.  根据权利要求24所述的太阳能电池片双面焊接方法,其特征在于,使焊接载具具有加热功能,通过焊接载具对承载面上的第一条状导电连接件、电池片以及电池片外侧面上的第二条状导电连接件进行加热。
  26.  根据权利要求1所述的太阳能电池片双面焊接方法,其特征在于,使承载面具有真空吸附功能;实现在承载面上贴放电池片时,对电池片进行真空吸附。
  27.  根据权利要求1所述的太阳能电池片双面焊接方法,其特征在于,实现使第一条状导电连接件、第二条状导电连接件都焊接在电池片上之后,将第一条状导电连接件和第二条状导电连接件截断,实现在电池片上残留第一条状导电连接件小段和第二条状导电连接件小段,且第一条状导电连接件小段和第二条状导电连接件小段用于其所在电池片的串接;然后将电池片从焊接载具的承载面上取下。
PCT/CN2023/110135 2022-09-27 2023-07-31 一种太阳能电池片双面焊接方法 WO2024066719A1 (zh)

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CN115483314A (zh) * 2022-09-27 2022-12-16 常州时创能源股份有限公司 太阳能电池片焊接方法
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