Laminated battery string repair method and repair device

Abstract

The invention provides a laminated battery string repair method and a repair device. The laminated battery string repair method comprises the following steps: firstly, heating a defective battery piece so that a first welding strip group and a second welding strip group welded on the defective battery piece are desoldered from the defective battery piece; and then the first side film strip and the second side film strip on the defective battery piece are pressed on the defective battery piece, and the first side adjacent battery piece and the second side adjacent battery piece are controlled to move away from the defective battery piece, so that the first side film strip and the second side film strip are respectively separated from the first side adjacent battery piece and the second side adjacent battery piece. And then the first welding strip group and the second welding strip group are cut off, the defective battery pieces are removed, and the replacement battery pieces with the first replacement film strip, the second replacement film strip, the first replacement welding strip group and the second replacement welding strip group are welded to the vacant positions after the defective battery pieces are removed, so that repair of the laminated battery string can be completed. According to the laminated battery string repair method provided by the invention, automatic repair of the laminated battery string is realized.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell production equipment, and more particularly to a method and device for repairing laminated battery strings. Background Art

[0002] Figures 1 to 3 A laminated battery string is shown in Figures 1 to 3 As shown, in two adjacent cell wafers 100 of the laminated battery string, the first half of the solder ribbon group 300 is stacked and welded on the first surface (such as the upper surface) of the cell wafer 100 on the first side (such as the left side), and the second half of the solder ribbon group 300 is welded on the second surface (such as the lower surface) of the adjacent cell wafer 100 on the second side (such as the right side). The edges of two adjacent cell wafers 100 overlap vertically, and a film strip 200 is provided at the overlapping portion of two adjacent cell wafers 100. Among them, the second surface (such as the lower surface) of the film strip 200 is adhered to the first surface (such as the upper surface) of the cell wafer 100 on the first side (such as the left side), and the first surface (such as the upper surface) of the film strip 200 is adhered to the second surface (such as the lower surface) of the solder ribbon group and the adjacent cell wafer 100 on the second side (such as the right side).

[0003] The film strip 200 can buffer the stress at the overlapping portion of adjacent cell wafers during the lamination of the photovoltaic module, thereby preventing the overlapping portion of adjacent cell wafers from being damaged by pressure.

[0004] For the above-mentioned laminated battery string, when there is a defective cell wafer (hereinafter referred to as a defective cell) in the battery string, according to the actual situation, it is possible to choose to replace and repair the defective cell in the battery string, that is, to remove the defective cell from the battery string and replace it with a qualified cell wafer (hereinafter referred to as a replacement cell).

[0005] Currently, the commonly used battery string repair equipment and repair methods are mainly used for the replacement and repair of conventional battery strings without film strips and with non-overlapping adjacent cell wafers, and it is difficult to repair laminated battery strings with film strips. Summary of the Invention

[0006] In view of the above technical problems, the present application provides a method for repairing a laminated battery string, and its detailed technical solution is as follows:

[0007] A method for repairing a laminated battery string for replacing a defective cell in a laminated battery string, the laminated battery string being formed by welding a plurality of cell wafers through a plurality of solder ribbon groups, the method for repairing the laminated battery string comprising:

[0008] Providing a laminated battery string containing a defective cell to be repaired, with the first surface of the laminated battery string facing upward;

[0009] Heat the defective cell to desolder the first solder tape group welded to the second surface of the defective cell and the second solder tape group welded to the first surface of the defective cell from the defective cell, wherein the first solder tape group is also welded to the first surface of the first adjacent cell on the first side, and the second solder tape group is also welded to the second surface of the second adjacent cell on the second side;

[0010] Press the first side film strip onto the defective cell, and press the second side film strip onto the defective cell, wherein the first side film strip is the film strip located between the defective cell and the first adjacent cell on the first side, and the second side film strip is the film strip located between the defective cell and the second adjacent cell on the second side;

[0011] Control the first adjacent cell and the second adjacent cell to move away from the defective cell, so that the first side film strip detaches from the first adjacent cell, the second side film strip detaches from the second adjacent cell, and the first solder tape group and the second solder tape group are partially withdrawn from the defective cell;

[0012] Cut the first solder tape group between the defective cell and the first adjacent cell on the first side, and cut the second solder tape group between the defective cell and the second adjacent cell on the second side, and remove the defective cell with the first side film strip, the second side film strip, the first solder tape group and the second solder tape group;

[0013] Place the replacement cell with its first surface facing up at the position vacated after the defective cell is removed. The first replacement film strip is bonded to the first side edge of the replacement cell, the second replacement film strip is bonded to the second side edge of the replacement cell, the first replacement solder tape group is welded to the second surface of the replacement cell, and the second replacement solder tape group is welded to the first surface of the replacement cell;

[0014] Control the first adjacent cell to move back towards the replacement cell so that the first side edge of the replacement cell coincides with the first adjacent cell, and the first replacement film strip enters between the replacement cell and the first adjacent cell; and control the second adjacent cell to move back towards the replacement cell so that the second side edge of the replacement cell coincides with the second adjacent cell, and the second replacement film strip enters between the replacement cell and the second adjacent cell;

[0015] Weld the solder tapes in the first solder tape group and the first replacement solder tape group together one by one, and weld the solder tapes in the second solder tape group and the second replacement solder tape group together one by one.

[0016] The method for repairing a stacked battery string provided by the present application first heats a defective cell to solder the first solder tape group and the second solder tape group welded to the defective cell to be desoldered from the defective cell. Before, during or after heating, the first side film strip and the second side film strip on both sides of the defective cell are pressed against the defective cell. After heating and desoldering, the first adjacent cell and the second adjacent cell located on both sides of the defective cell are controlled to move away from the defective cell, so that the first side film strip and the second side film strip are respectively separated from the first adjacent cell and the second adjacent cell. Subsequently, the first solder tape group and the second solder tape group are cut, and the defective cell can be removed from the stacked battery string. Finally, a replacement cell with a first replacement film strip, a second replacement film strip, a first replacement solder tape group and a second replacement solder tape group is welded to the position vacated after the defective cell is removed to complete the repair of the stacked battery string. The method for repairing a stacked battery string provided by the present application realizes the automatic repair of the stacked battery string.

[0017] In some embodiments, before cutting the first solder tape group between the defective cell and the first adjacent cell, the method for repairing a stacked battery string further includes: controlling the first adjacent cell to descend relative to the defective cell so that a height difference is generated between the first adjacent cell and the defective cell; before, after or simultaneously with controlling the first adjacent cell to move and reset towards the replacement cell, the method for repairing a stacked battery string further includes: controlling the first adjacent cell to rise and return to its original position. Before cutting the second solder tape group between the defective cell and the second adjacent cell, the method for repairing a stacked battery string further includes: controlling the second adjacent cell to rise relative to the defective cell so that a height difference is generated between the second adjacent cell and the defective cell; before, after or simultaneously with controlling the second adjacent cell to move and reset towards the replacement cell, the method for repairing a stacked battery string further includes: controlling the second adjacent cell to descend and return to its original position.

[0018] After a height difference is generated between the first adjacent cell and the defective cell, the first solder tape group to be cut between the first adjacent cell and the defective cell is pulled to an inclined state, and the un-welded part at the second edge of the first solder tape group and the first adjacent cell is fully opened, providing a larger operating space for cutting the first solder tape group and facilitating the cutting of the first solder tape group. Similarly, after a height difference is generated between the second adjacent cell and the defective cell, the second solder tape group to be cut between the second adjacent cell and the defective cell is pulled to an inclined state, and the un-welded part at the second edge of the second solder tape group and the defective cell is fully opened, providing a larger operating space for cutting the second solder tape group and facilitating the cutting of the second solder tape group.

[0019] In some embodiments, cutting the first solder ribbon group between the defective cell and the first adjacent cell on the first side includes: cutting the first solder ribbon group directly above the first adjacent cell on the first side, leaving the end of the first solder ribbon group on the first adjacent cell on the first side tilted upward, and forming a first insertion gap between the first adjacent cell on the first side. When the first side edge of the replacement cell is superposed with the first adjacent cell on the first side, the first replacement film strip enters the first insertion gap. Cutting the second solder ribbon group between the defective cell and the second adjacent cell on the second side includes: cutting the second solder ribbon group directly above the defective cell; the end of the second replacement solder ribbon group on the replacement cell facing the second adjacent cell is tilted upward, forming a second insertion gap between the second replacement solder ribbon group and the replacement cell, and the second replacement film strip is located in the second insertion gap.

[0020] By cutting the first solder ribbon group directly above the first adjacent cell on the first side, the subsequent lap welding position of the first solder ribbon group and the first replacement solder ribbon group can be located inside the first surface of the cell. When the first surface of the cell is the back surface of the cell, the lap welding part can be located on the back surface of the photovoltaic module and will not be exposed. In addition, the end of the first solder ribbon group remaining on the first adjacent cell on the first side is tilted upward, thereby forming a first insertion gap between the first adjacent cell on the first side. When controlling the first adjacent cell on the first side to move and reset towards the replacement cell, the first replacement film strip on the replacement cell can be inserted into the first insertion gap, thereby ensuring that the first replacement film strip can smoothly enter the superposed position between the replacement cell and the first adjacent cell on the first side.

[0021] Similarly, by cutting the second solder ribbon group directly above the defective cell, the subsequent lap welding position of the second solder ribbon group and the second replacement solder ribbon group can be located inside the first surface of the replacement cell. When the first surface of the cell is the back surface of the cell, the lap welding part can be located on the back surface of the photovoltaic module and will not be exposed. In addition, by setting the end of the second replacement solder ribbon group on the replacement cell to be tilted upward towards the second adjacent cell on the second side, a second insertion gap is formed between the end of the second replacement solder ribbon group and the replacement cell, and the second replacement film strip is located in the second insertion gap. In this way, when controlling the second adjacent cell on the second side to move and reset towards the replacement cell, the first side edge of the second adjacent cell on the second side can be inserted into the second insertion gap, thereby ensuring that the second replacement film strip automatically enters the superposed position between the replacement cell and the second adjacent cell on the second side.

[0022] In some embodiments, pressing the first side film strip onto the defective cell includes: avoiding the first adjacent cell on the first side and the first solder ribbon group and pressing the first side edge of the defective cell, so that the first side edge of the defective cell presses the first side film strip; pressing the second side film strip onto the defective cell includes: avoiding the second adjacent cell on the second side and the second solder ribbon group and pressing the second side film strip onto the defective cell.

[0023] By avoiding the first-side adjacent cell and pressing the first-side edge of the defective cell with the first solder ribbon group, the first-side edge of the defective cell can be pressed against the first-side film strip. At the same time, when the first-side adjacent cell moves away from the pressed defective cell, the first-side film strip can remain on the defective cell, will not move with the first-side adjacent cell, and the first solder ribbon group can be smoothly withdrawn from the upper part of the defective cell.

[0024] Similarly, by avoiding the second-side adjacent cell and pressing the second-side film strip onto the defective cell with the second solder ribbon group, it can be ensured that when the second-side adjacent cell moves away from the defective cell, the second-side film strip can remain on the defective cell, will not move with the second-side adjacent cell, and the second solder ribbon group can be smoothly withdrawn from the upper part of the defective cell.

[0025] In some embodiments, before welding the solder ribbons in the first solder ribbon group and the first replacement solder ribbon group to each other one by one, the method for repairing a stacked cell string further includes: clamping the solder ribbons in the first solder ribbon group and the first replacement solder ribbon group to each other one by one; before welding the solder ribbons in the second solder ribbon group and the second replacement solder ribbon group to each other one by one, the method for repairing a stacked cell string further includes: clamping the solder ribbons in the second solder ribbon group and the second replacement solder ribbon group to each other one by one.

[0026] After clamping the solder ribbons in the first solder ribbon group and the first replacement solder ribbon group to each other one by one and then performing welding, it can be ensured that the solder ribbons in the first solder ribbon group and the first replacement solder ribbon group can be welded to each other one by one and reliably, preventing missed welding and false welding. Similarly, after clamping the solder ribbons in the second solder ribbon group and the second replacement solder ribbon group to each other one by one and then performing welding, it is ensured that the solder ribbons in the second solder ribbon group and the second replacement solder ribbon group can be welded to each other one by one and reliably, preventing missed welding and false welding.

[0027] In some embodiments, the welding method is any one of laser welding, infrared welding, hot air heating welding, and electromagnetic induction welding.

[0028] Several welding methods are provided, all of which can ensure that the solder ribbons in the first solder ribbon group and the first replacement solder ribbon group can be welded together, and the solder ribbons in the second solder ribbon group and the second replacement solder ribbon group can be welded together.

[0029] The present application further provides a repair device, which is applied to the method for repairing a stacked cell string described in any one of the above. The repair device includes a repair table, a first pressing mechanism, a second pressing mechanism, a shearing mechanism, a handling mechanism, and a welding mechanism, wherein:

[0030] The repair station includes a first-side bearing platform, a middle bearing platform, and a second-side bearing platform. Among them, the middle bearing platform is used to bear the defective cell in the stacked cell string. The first-side bearing platform is located on the first side of the middle bearing platform and is used to bear the cells on the first side of the defective cell in the stacked cell string. The second-side bearing platform is located on the second side of the middle bearing platform and is used to bear the cells on the second side of the defective cell in the stacked cell string;

[0031] The middle bearing platform is configured to heat the defective cell;

[0032] The first pressing mechanism is configured to press the first-side film strip onto the defective cell, and the second pressing mechanism is configured to press the second-side film strip onto the defective cell;

[0033] The first-side bearing platform and the second-side bearing platform are configured to move away from the middle bearing platform so that the first-side film strip disengages from the first-side adjacent cell, the second-side film strip disengages from the second-side adjacent cell, and the first solder tape group and the second solder tape group are partially withdrawn from the defective cell;

[0034] The shearing mechanism is configured to cut the first solder tape group between the defective cell and the first-side adjacent cell, and to cut the second solder tape group between the defective cell and the second-side adjacent cell;

[0035] The handling mechanism is configured to remove the defective cell from the middle bearing platform and place the replacement cell at the position vacated after the defective cell is removed;

[0036] The first-side bearing platform is further configured to move back towards the middle bearing platform so that the first-side edge of the replacement cell overlaps with the first-side adjacent cell, and the first replacement film strip enters between the replacement cell and the first-side adjacent cell; the second-side bearing platform is further configured to move back towards the middle bearing platform so that the second-side edge of the replacement cell overlaps with the second-side adjacent cell, and the second replacement film strip enters between the replacement cell and the second-side adjacent cell;

[0037] The welding mechanism is configured to weld the solder tapes in the first solder tape group and the first replacement solder tape group to each other one by one, and to weld the solder tapes in the second solder tape group and the second replacement solder tape group to each other one by one.

[0038] The repair device provided by the present application first heats the defective cell on the intermediate carrier platform, so that the first solder strip group and the second solder strip group welded to the defective cell are desoldered from the defective cell. Before, during or after the heating and desoldering, the first pressing mechanism and the second pressing mechanism press the first side film strip and the second side film strip on both sides of the defective cell against the defective cell respectively. After desoldering, the first side carrier platform and the second side carrier platform drive the first side adjacent cell and the second side adjacent cell on both sides of the defective cell to move away from the defective cell respectively, so that the first side film strip and the second side film strip are separated from the first side adjacent cell and the second side adjacent cell respectively. Subsequently, the first solder strip group and the second solder strip group are cut by a shearing mechanism, and the removed defective cell is removed from the stacked cell string by a handling mechanism. Finally, the replacement cell with the first replacement film strip, the second replacement film strip, the first replacement solder strip group and the second replacement solder strip group is transported to the position vacated after the defective cell is removed by the handling mechanism, and the replacement cell is welded into the stacked cell string by a welding mechanism, thus completing the repair of the stacked cell string. The repair device provided by the present application realizes the automatic repair of the stacked cell string.

[0039] In some embodiments, the first side edge of the defective cell extends out of the intermediate carrier platform and overlaps on the upper side of the first side adjacent cell, and the initial position height of the first side carrier platform is lower than that of the intermediate carrier platform; the first side edge of the second side adjacent cell extends out of the second side carrier platform and overlaps on the upper side of the defective cell, and the initial position height of the second side carrier platform is not lower than that of the intermediate carrier platform.

[0040] The first side edge of the defective cell extends out of the intermediate carrier platform and overlaps on the upper side of the first side adjacent cell, and the initial position height of the first side carrier platform is set to be lower than that of the intermediate carrier platform, which can prevent the stress at the overlapping position of the defective cell and the first side adjacent cell from being too large when the first pressing mechanism presses the first side edge of the defective cell downward, resulting in damage to the first side edge of the defective cell and the second side edge of the first side adjacent cell.

[0041] The second side edge of the defective cell is carried on the intermediate carrier platform, the first side edge of the second side adjacent cell extends out of the second side carrier platform and overlaps on the upper side of the defective cell, and the initial position height of the second side carrier platform is set to be not lower than that of the intermediate carrier platform, ensuring that the second pressing mechanism can press the second side film strip against the defective cell, preventing the position where the defective cell is pressed by the second pressing mechanism from being suspended, causing damage to the defective cell, and reducing the stress between the overlapping parts of the second side adjacent cell and the defective cell.

[0042] In some embodiments, the first pressing mechanism and the second pressing mechanism have the same structure. The first pressing mechanism includes a plurality of pressing heads arranged at intervals in the width direction of the repair table. Each pressing head in the first pressing mechanism presses down on the first side edge of the defective cell while avoiding the solder tapes in the first solder tape group. Each pressing head in the second pressing mechanism presses down on the second side film strip while avoiding the solder tapes in the second solder tape group; alternatively, the first pressing mechanism includes a pressing plate, and a plurality of pressing teeth are arranged at intervals in the width direction of the repair table at the bottom of the pressing plate. Each pressing tooth in the first pressing mechanism presses down on the first side edge of the defective cell while avoiding the solder tapes in the first solder tape group. Each pressing tooth in the second pressing mechanism presses down on the second side film strip while avoiding the solder tapes in the second solder tape group.

[0043] By setting the first pressing mechanism, the first pressing mechanism can press down on the first side edge of the defective cell while avoiding the solder tapes in the first solder tape group. Since the first solder tape group is not pressed by the first pressing mechanism, when the first side carrier moves away from the middle carrier, the first solder tape group can be partially pulled out from the defective cell. Similarly, by setting the second pressing mechanism, the second pressing mechanism can press down on the second side film strip on the defective cell while avoiding the solder tapes in the second solder tape group. Since the second solder tape group is not pressed by the second pressing mechanism, when the second side carrier moves away from the middle carrier, the second solder tape group can be partially pulled out from the defective cell.

[0044] In some embodiments, the first side carrier is configured to be able to drive the first side adjacent cell to move up and down relative to the defective cell, and drive the first side adjacent cell to translate towards or away from the defective cell; the second side carrier is configured to be able to drive the second side adjacent cell to move up and down relative to the defective cell, and drive the second side adjacent cell to translate towards or away from the defective cell.

[0045] By setting the first-side carrier stage, after the first pressing mechanism presses the first-side film strip onto the defective cell and completes heating, the first-side carrier stage can drive the first-side adjacent cell to translate away from the defective cell, so that the first-side film strip is separated from the first-side adjacent cell, and the first solder ribbon group can be partially withdrawn from the defective cell. When the handling mechanism places the replacement cell at the position vacated after the defective cell is removed, the first-side carrier stage can drive the first-side adjacent cell to translate and reset towards the replacement cell, so that the first-side edge of the replacement cell coincides with the first-side adjacent cell, and the first replacement film strip enters between the replacement cell and the first-side adjacent cell. In addition, since the first-side carrier stage can drive the first-side adjacent cell to move up and down relative to the defective cell, before the shearing mechanism cuts the first solder ribbon group between the defective cell and the first-side adjacent cell, the first-side carrier stage can drive the first-side adjacent cell to descend relative to the defective cell, so as to leave a sufficiently large shearing space for the shearing mechanism and facilitate the shearing mechanism to cut the first solder ribbon group.

[0046] Similarly, by setting the second-side carrier stage, after the second pressing mechanism presses the second-side film strip onto the defective cell, the second-side carrier stage can drive the second-side adjacent cell to translate away from the defective cell, so that the second-side film strip is separated from the second-side adjacent cell, and the second solder ribbon group is partially withdrawn from the defective cell. When the handling mechanism places the replacement cell at the position vacated after the defective cell is removed, the second-side carrier stage can drive the second-side adjacent cell to translate and reset towards the replacement cell, so that the second-side edge of the replacement cell coincides with the second-side adjacent cell, and the second replacement film strip enters between the replacement cell and the second-side adjacent cell. In addition, since the second-side carrier stage can drive the second-side adjacent cell to move up and down relative to the defective cell, before the shearing mechanism cuts the second solder ribbon group between the defective cell and the second-side adjacent cell, the second-side carrier stage can drive the second-side adjacent cell to ascend relative to the defective cell, so as to leave a sufficiently large shearing space for the shearing mechanism and facilitate the shearing mechanism to cut the second solder ribbon group.

[0047] In some embodiments, the repair device further includes a solder ribbon clamping mechanism; the solder ribbon clamping mechanism is configured to clamp the solder ribbons in the first solder ribbon group and the first replacement solder ribbon group together one by one; and is configured to clamp the solder ribbons in the second solder ribbon group and the second replacement solder ribbon group together one by one.

[0048] Before the welding mechanism welds the welding tapes in the first welding tape group and the first replacement welding tape group together one by one, the welding tape clamping mechanism clamps the welding tapes in the first welding tape group and the first replacement welding tape group together one by one, so as to ensure that the welding tapes in the first welding tape group and the first replacement welding tape group can be welded firmly one by one, preventing missed welding and false welding. Similarly, before the welding mechanism welds the welding tapes in the second welding tape group and the second replacement welding tape group together one by one, the welding tape clamping mechanism clamps the welding tapes in the second welding tape group and the second replacement welding tape group together one by one, so as to ensure that the welding tapes in the second welding tape group and the second replacement welding tape group can be welded firmly one by one, preventing missed welding and false welding.

[0049] In some embodiments, the repair device further includes a heating mechanism, and the heating mechanism can be moved above the intermediate carrier to cooperate with the intermediate carrier to heat the defective solar cell.

[0050] The heating mechanism cooperates with the intermediate carrier to heat the defective solar cell, which can accelerate the desoldering of the defective solar cell and the first and second welding tape groups welded thereto, thereby accelerating the working rhythm and improving the repair efficiency. After completing the heating and desoldering of the first and second welding tape groups, the heating mechanism moves away from the intermediate carrier to an avoidance position to avoid interfering with the shearing mechanism and the welding structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic structural diagram of a laminated battery string;

[0052] Figure 2 is a schematic diagram of the first surface of three consecutive solar cells in a laminated battery string;

[0053] Figure 3 is a schematic diagram of the second surface of three consecutive solar cells in a laminated battery string;

[0054] Figure 4 is a schematic diagram of a defective solar cell, a first adjacent solar cell and a second adjacent solar cell before repair;

[0055] Figure 5 is a schematic diagram after the first adjacent solar cell and the second adjacent solar cell move a predetermined distance away from the defective solar cell;

[0056] Figure 6 is a schematic diagram after the first adjacent solar cell and the second adjacent solar cell descend and ascend relative to the defective solar cell respectively;

[0057] Figure 7 is a schematic structural diagram of a first adjacent solar cell, a second adjacent solar cell and a replacement solar cell;

[0058] Figure 8Schematic structural diagram of the repair device in the embodiment of the present application;

[0059] Figure 9 Partial structural schematic diagram of the repair device in the embodiment of the present application;

[0060] Figure 10 Schematic diagram of the pressing process of the first pressing mechanism and the second pressing mechanism in an embodiment of the present application;

[0061] Figure 11 Schematic diagram of the pressing process of the first pressing mechanism on the first side edge of the defective battery cell in an embodiment of the present application;

[0062] Figure 12 is Figure 11 Partial enlarged view of area A in;

[0063] Figure 13 Schematic diagram of the shearing process of the shearing mechanism on the first solder tape group in the embodiment of the present application;

[0064] Figure 14 Schematic diagram of the clamping of the first solder tape group and the first replacement solder tape group by the solder tape clamping mechanism in the embodiment of the present application;

[0065] Figure 15 Schematic structural diagram of the solder tape clamping mechanism in the embodiment of the present application;

[0066] Figure 16 Schematic diagram of the clamping process of the first chuck and the second chuck cooperating to clamp two solder tapes to be welded in the embodiment of the present application;

[0067] Figure 17 Schematic structural diagram of the shearing mechanism in the embodiment of the present application;

[0068] Figure 18 Schematic structural diagram of the movable cutting knife in the embodiment of the present application;

[0069] Figure 19 Schematic structural diagram of the hook-shaped knife in the embodiment of the present application.

[0070] Figures 1 to 19 includes:

[0071] Defective battery cell 1, first adjacent battery cell 2, second adjacent battery cell 3, first solder tape group 4, second solder tape group 5, first side film strip 6, second side film strip 7, replacement battery cell 8, first replacement film strip 9, second replacement film strip 10, first replacement solder tape group 11, second replacement solder tape group 12;

[0072] Repair table 20: first side bearing table 22, intermediate bearing table 21, second side bearing table 23;

[0073] The first pressing mechanism 30: the pressing head 31;

[0074] The second pressing mechanism 40;

[0075] The shearing mechanism 50: the cutter seat 52, the fixed cutter 53, the movable cutter 54, the cutter driving part 55, the hook-shaped cutter 56, the second cutting edge 541, the supporting inclined surface 561, the first cutting edge 562;

[0076] The solder strip clamping mechanism 60: the mounting frame 61, the first moving frame 62, the second moving frame 63, the first chuck 64, the second chuck 65, the first avoidance hole 641, the first bottom surface 643, the second bottom surface 644, the side vertical surface 645, the second avoidance hole 651;

[0077] The heating mechanism 70;

[0078] The solar cell 100, the film strip 200, the solder strip group 300. Detailed implementation manners

[0079] To make the above objects, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0080] As described in the background art section, the currently commonly used battery string repair equipment and repair methods are mainly used for replacing and repairing conventional battery strings without film strips and with non-overlapping adjacent solar cells, and it is difficult to implement the repair of the stacked battery string with film strips.

[0081] For this reason, the present application provides a method for repairing a stacked battery string, which can automatically replace and repair defective solar cells in the stacked battery string.

[0082] For the sake of simplicity of illustration, Figure 4 only the defective solar cell 1 in the stacked battery string to be repaired, the first side adjacent solar cell 2 located on the first side (such as the left side) of the defective solar cell 1, and the second side adjacent solar cell 3 located on the second side (such as the right side) of the defective solar cell 1 are shown, where:

[0083] The second surface (such as the lower surface) of the defective cell 1 is welded to the first surface (such as the upper surface) of the first adjacent cell 2 via the first solder ribbon group 4. A first side film strip 6 is provided at the overlapping portion of the defective cell 1 and the first adjacent cell 2. The second surface (such as the lower surface) of the first side film strip 6 is adhered to the first surface (such as the upper surface) of the first adjacent cell 2, and the first surface (such as the upper surface) of the first side film strip 6 is adhered to the first solder ribbon group 4 and the second surface (such as the lower surface) of the defective cell 1.

[0084] The first surface (such as the upper surface) of the defective cell 1 is welded to the second surface (such as the lower surface) of the second adjacent cell 3 via the second solder ribbon group 5. A second side film strip 7 is provided at the overlapping portion of the defective cell 1 and the second adjacent cell 3. The second surface (such as the lower surface) of the second side film strip 7 is adhered to the first surface (such as the upper surface) of the defective cell 1, and the first surface (such as the upper surface) of the second side film strip 7 is adhered to the second solder ribbon group 5 and the second surface (such as the lower surface) of the second adjacent cell 3.

[0085] With reference to Figures 4 to 7 , the method for repairing a stacked cell string according to an embodiment of the present application includes the following steps:

[0086] S1. Provide a stacked cell string containing a defective cell 1 to be repaired, with the first surface of the stacked cell string facing upward.

[0087] S2. Heat the defective cell 1 so that the first solder ribbon group 4 welded to the second surface of the defective cell 1 and the second solder ribbon group 5 welded to the first surface of the defective cell 1 are desoldered from the defective cell 1. Among them, the first solder ribbon group 4 is also welded to the first surface of the first adjacent cell 2, and the second solder ribbon group 5 is also welded to the second surface of the second adjacent cell 3.

[0088] S3. Press the first side film strip 6 onto the defective cell 1, and press the second side film strip 7 onto the defective cell 1. Among them, the first side film strip 6 is a film strip located between the defective cell 1 and the first adjacent cell 2, and the second side film strip 7 is a film strip located between the defective cell 1 and the second adjacent cell 3.

[0089] S4. Control the first adjacent cell 2 and the second adjacent cell 3 to move away from the defective cell 1, so that the first side film strip 6 is separated from the first adjacent cell 2, the second side film strip 7 is separated from the second adjacent cell 3, and the first solder ribbon group 4 and the second solder ribbon group 5 are partially withdrawn from the defective cell 1.

[0090] S5, cut off the first solder ribbon group 4 between the defective battery cell 1 and the battery cell 2 adjacent to the first side, and cut off the second solder ribbon group 5 between the defective battery cell 1 and the battery cell 3 adjacent to the second side, and remove the defective battery cell with the first side film strip 6, the second side film strip 7, the first solder ribbon group 4 and the second solder ribbon group 5.

[0091] S6. Place the replacement battery cell 8 with the first surface facing upwards at the position vacated after the defective battery cell 1 is removed, wherein a first replacement film strip 9 is bonded to the first side edge of the replacement battery cell 8, a second replacement film strip 10 is bonded to the second side edge of the replacement battery cell 8, a first replacement welding tape group 11 is welded to the second surface of the replacement battery cell 8, and a second replacement welding tape group 12 is welded to the first surface of the replacement battery cell 8.

[0092] S7, control the first side adjacent battery cell 2 to move and reset toward the replacement battery cell 8, so that the first side edge of the replacement battery cell 8 overlaps with the first side adjacent battery cell 2, and the first replacement membrane strip 9 enters between the replacement battery cell 8 and the first side adjacent battery cell 2; and control the second side adjacent battery cell 3 to move and reset toward the replacement battery cell 8, so that the second side edge of the replacement battery cell 8 overlaps with the second side adjacent battery cell 3, and the second replacement membrane strip 10 enters between the replacement battery cell 8 and the second side adjacent battery 3.

[0093] S8. Weld the first welding ribbon group 4 and the welding ribbons in the first replacement welding ribbon group 11 together in a one-to-one correspondence, and weld the second welding ribbon group 5 and the welding ribbons in the second replacement welding ribbon group 12 together in a one-to-one correspondence.

[0094] Among them, step S2 and step S3 can be implemented simultaneously, or step S2 can be implemented first and then step S3, or step S3 can be implemented first and then step S2.

[0095] In step S1 , the first surface of the laminated cell string facing upward is, for example, the back side of the laminated cell string, ie, the non-light-receiving side of the laminated cell string.

[0096] In step S2, the heating temperature of the defective cell 1 must at least reach the melting point of the solder on the surface of the first solder ribbon group 4 and the second solder ribbon group 5, so as to release the metallization connection between the first solder ribbon group 4, the second solder ribbon group 5 and the defective cell 1, thereby achieving the effect of "desoldering". At the same time, the first side film strip 6 is softened by heat, and the bonding between it and the first side adjacent cell 2 and the defective cell 1 is released. Similarly, the second side film strip 7 is softened by heat, and the bonding between it and the second side adjacent cell 3 and the defective cell 1 is released.

[0097] In step S4, Figure 5As shown, the distance that the first adjacent cell 2 moves away from the defective cell 1 on the first side and the distance that the second adjacent cell 3 moves away from the defective cell 1 on the second side are set according to specific circumstances, as long as it is ensured that the first side film strip 6 and the second side film strip 7 can be separated from the first adjacent cell 2 on the first side and the second adjacent cell 3 on the second side respectively, and the distance between the defective cell 1 and the first adjacent cell 2 and the distance between the defective cell 1 and the second adjacent cell 3 are sufficient to ensure that the first solder tape group 4 and the second solder tape group can be cut. For example, the distance that the first adjacent cell 2 and the second adjacent cell 3 move away from the defective cell 1 is 10 mm.

[0098] In step S5, after cutting the first solder tape group 4 between the defective cell 1 and the first adjacent cell 2, the first solder tape group 4 welded on the second surface of the defective cell 1 is finally removed from the laminated battery string together with the defective cell 1. The first solder tape group 4 welded on the first surface of the first adjacent cell 2 remains on the first surface of the first adjacent cell 2 to be welded to the first replacement solder tape group 11 on the replacement cell 8, and finally a new complete first solder tape group is formed. Similarly, after cutting the second solder tape group 5 between the defective cell 1 and the second adjacent cell 3, the second solder tape group 5 welded on the first surface of the defective cell 1 is finally removed from the laminated battery string together with the defective cell 1. The second solder tape group 5 welded on the second surface of the second adjacent cell 3 remains on the second surface of the second adjacent cell 3 to be welded to the second replacement solder tape group 12 on the replacement cell 8, and finally a new complete second solder tape group is formed.

[0099] The method for repairing a laminated battery string according to the embodiment of the present application first heats the defective cell 1 to make the first solder tape group 4 and the second solder tape group 5 welded on the defective cell 1 be desoldered from the defective cell 1. Before, at the same time as, or after heating, the first side film strip 6 and the second side film strip 7 at the two side edges of the defective cell 1 are pressed against the defective cell 1. After heating and desoldering, the first adjacent cell 2 and the second adjacent cell 3 located on both sides of the defective cell 1 are controlled to move away from the defective cell 1, so that the first side film strip 6 and the second side film strip 7 are separated from the first adjacent cell 2 and the second adjacent cell 3 respectively. Subsequently, the first solder tape group 4 and the second solder tape group 5 are cut, and the defective cell 1 can be removed from the laminated battery string. Finally, the replacement cell 8 with the first replacement film strip 9, the second replacement film strip 10, the first replacement solder tape group 11 and the second replacement solder tape group 12 is welded to the position vacated after the defective cell is removed to complete the repair of the laminated battery string.

[0100] As Figure 6As shown, optionally, before cutting the first solder ribbon group between the defective cell 1 and the first adjacent cell 2 in step S5, the method for repairing a laminated cell string in an embodiment of the present application further includes:

[0101] Controlling the first adjacent cell 2 to descend relative to the defective cell 1 so that a height difference is generated between the first adjacent cell 2 and the defective cell 1.

[0102] In this way, the first solder ribbon group 4 to be cut between the first adjacent cell 2 and the defective cell 1 can be pulled to an inclined state, and the un-welded part at the second edge of the first solder ribbon group 4 and the first adjacent cell 2 is fully opened, providing a larger operating space for cutting the first solder ribbon group 4.

[0103] Correspondingly, before, after or simultaneously with controlling the first adjacent cell 2 to move and reset towards the replacement cell 8 in step S7, the method for repairing a laminated cell string in an embodiment of the present application further includes:

[0104] Controlling the first adjacent cell 2 to rise and return to its original position, thereby eliminating the height difference to ensure that the first side edge of the replacement cell 8 coincides with the first adjacent cell 2.

[0105] Similarly, before cutting the second solder ribbon group 5 between the defective cell 1 and the second adjacent cell 3 in step S5, the method for repairing a laminated cell string in an embodiment of the present application further includes:

[0106] Controlling the second adjacent cell 3 to rise relative to the defective cell 1 so that a height difference is generated between the second adjacent cell 3 and the defective cell 1.

[0107] In this way, the second solder ribbon group 5 to be cut between the second adjacent cell 3 and the defective cell 1 can be pulled to an inclined state, and the un-welded part at the second edge of the second solder ribbon group 5 and the defective cell 1 is fully opened, providing a larger operating space for cutting the second solder ribbon group 5.

[0108] Correspondingly, before, after or simultaneously with controlling the second adjacent cell 3 to move and reset towards the replacement cell 8 in step S7, the method for repairing a laminated cell string in an embodiment of the present application further includes:

[0109] Controlling the second adjacent cell 3 to descend and return to its original position, thereby eliminating the height difference to ensure that the second side edge of the replacement cell 8 coincides with the second adjacent cell 3.

[0110] Optionally, cutting the first solder ribbon group 4 between the defective cell 1 and the first adjacent cell 2 in step S5 is specifically: cutting the first solder ribbon group 4 directly above the first adjacent cell 2, so that the subsequent overlapping welding position of the first solder ribbon group 4 and the first replacement solder ribbon group 11 can be located inside the first surface of the cell. When the first surface of the cell is the back surface of the cell, the overlapping welding part can be located on the back surface of the photovoltaic module and will not be exposed. In addition, the end of the first solder ribbon group 4 remaining on the first adjacent cell 2 is tilted upward, and a first insertion gap a as shown in Figure 7 is formed between the first adjacent cell 2.

[0111] In this way, when controlling the first adjacent cell 2 to move back to the replacement cell 8 in step S7, the first replacement film strip 9 on the replacement cell 8 can be inserted into the first insertion gap a, so as to ensure that the first replacement film strip 9 can smoothly enter the overlapping position between the replacement cell 8 and the first adjacent cell 2.

[0112] Similarly, optionally, cutting the second solder ribbon group 5 between the defective cell 1 and the second adjacent cell 3 in step S5 is specifically: cutting the second solder ribbon group 5 directly above the defective cell 1. The end of the second replacement solder ribbon group 12 on the replacement cell 8 facing the second adjacent cell 3 is tilted upward, forming a second insertion gap b with the replacement cell 8, and the second replacement film strip is located in the second insertion gap b.

[0113] By cutting the second solder ribbon group 5 directly above the defective cell 1, the subsequent overlapping welding position of the second solder ribbon group 5 and the second replacement solder ribbon group 12 can be located inside the first surface of the replacement cell 8. When the first surface of the cell is the back surface of the cell, the overlapping welding part can be located on the back surface of the photovoltaic module and will not be exposed. In addition, by setting the end of the second replacement solder ribbon group 12 on the replacement cell 8 to be tilted upward facing the second adjacent cell 3, a second insertion gap b is formed between the end of the second replacement solder ribbon group 12 and the replacement cell 8, and the second replacement film strip 10 is located in the second insertion gap b. In this way, when implementing the control in step S7 for the second adjacent cell to move back to the replacement cell, the first side edge of the second adjacent cell 3 is inserted into the second insertion gap b, so as to ensure that the second replacement film strip 10 can smoothly enter the overlapping position between the replacement cell 8 and the second adjacent cell 3.

[0114] Optionally, pressing the first side film strip 6 onto the defective cell 1 in step S3 is specifically: avoiding the first adjacent cell 2 and the first solder ribbon group 4 and pressing the first side edge of the defective cell 1, so that the first side edge of the defective cell 1 presses the first side film strip 6.

[0115] In this way, it can be ensured that the first-side film strip 6 is pressed and held on the defective cell 1. In addition, since the first-side adjacent cell 2 and the first solder ribbon group 4 are not pressed, it can be ensured that the first-side adjacent cell 2 can smoothly move away from the pressed defective cell 1, causing the first-side film strip 6 to disengage from the first-side adjacent cell 2, and the first solder ribbon group 4 can move with the first-side adjacent cell 2, thereby realizing partial extraction of the defective cell 1.

[0116] Similarly, in step S3, pressing the second-side film strip 7 onto the defective cell 1 specifically means pressing the second-side film strip 7 onto the defective cell 1 while avoiding the second-side adjacent cell 3 and the second solder ribbon group 5.

[0117] In this way, it can be ensured that the second-side film strip 7 is pressed and held on the defective cell 1. In addition, since the second-side adjacent cell 3 and the second solder ribbon group 5 are not pressed, it can be ensured that the second-side adjacent cell 3 can smoothly move away from the pressed defective cell 1, causing the second-side film strip 7 to disengage from the second-side adjacent cell 3, and the second solder ribbon group 5 can move with the second-side adjacent cell 3, thereby realizing partial extraction of the defective cell 1.

[0118] Optionally, before performing the step of welding the solder ribbons in the first solder ribbon group 4 and the first replacement solder ribbon group 11 in a one-to-one correspondence in step S8, the method for repairing a stacked battery string in an embodiment of the present application further includes:

[0119] Clamping the solder ribbons in the first solder ribbon group 4 and the first replacement solder ribbon group 11 in a one-to-one correspondence.

[0120] In this way, it can be ensured that the solder ribbons in the first solder ribbon group 4 on the first-side adjacent cell 2 and the first replacement solder ribbon group 11 on the replacement cell 8 can be welded together in a one-to-one correspondence and reliably, preventing missed welding and false welding.

[0121] Similarly, optionally, before performing the step of welding the solder ribbons in the second solder ribbon group 5 and the second replacement solder ribbon group 12 in a one-to-one correspondence in step S8, the method for repairing a stacked battery string in an embodiment of the present application further includes:

[0122] Clamping the solder ribbons in the second solder ribbon group 5 and the second replacement solder ribbon group 12 in a one-to-one correspondence.

[0123] In this way, it can be ensured that the solder ribbons in the second solder ribbon group 5 on the first-side adjacent cell 2 and the second replacement solder ribbon group 12 on the replacement cell 8 can be welded together in a one-to-one correspondence and reliably, preventing missed welding and false welding.

[0124] Optionally, the welding method for the first solder tape group 4 and the first replacement solder tape group 11, and the welding method for the second solder tape group 5 and the second replacement solder tape group 12 are any one of laser welding, infrared welding, hot air heating welding, and electromagnetic induction welding.

[0125] Each of the above welding methods can ensure that the solder tapes in the first solder tape group 4 and the first replacement solder tape group 11 can be welded together, and the solder tapes in the second solder tape group 5 and the second replacement solder tape group 12 can be welded together.

[0126] Based on the same application concept, the present application also provides a repair device, which is applied to the repair method of the stacked battery string in the above embodiment.

[0127] As Figures 8 to 14 shown, the repair device in the embodiment of the present application includes a repair table 20, a first pressing mechanism 30, a second pressing mechanism 40, a shearing mechanism 50, a handling mechanism (not shown in the figure), and a welding mechanism (not shown in the figure), where:

[0128] The repair table 20 includes a first side carrier 22, an intermediate carrier 21, and a second side carrier 23. Among them, the intermediate carrier 21 is used to carry the defective cell 1 in the stacked battery string. The first side carrier 22 is located on the first side (such as the left side) of the intermediate carrier 21, and the first side carrier 22 is used to carry the cells on the first side of the defective cell 1 in the stacked battery string. The second side carrier 23 is located on the second side (such as the right side) of the intermediate carrier 21, and the second side carrier 23 is used to carry the cells on the second side of the defective cell 1 in the stacked battery string.

[0129] The intermediate carrier 22 is configured to heat the defective cell 1.

[0130] The first pressing mechanism 30 is configured to press the first side film strip 6 onto the defective cell 1, and the second pressing mechanism 40 is configured to press the second side film strip 6 onto the defective cell 1.

[0131] The first side carrier 22 and the second side carrier 23 are configured to move away from the intermediate carrier 21, so that the first side film strip 6 is separated from the first side adjacent cell 2, the second side film strip 7 is separated from the second side adjacent cell 3, and the first solder tape group 4 and the second solder tape group 5 are partially withdrawn from the defective cell 1.

[0132] The shearing mechanism 50 is configured to cut the first solder tape group 4 between the defective cell 1 and the first side adjacent cell 2, and cut the second solder tape group 5 between the defective cell 1 and the second side adjacent cell 3.

[0133] The handling mechanism is configured to remove the defective cell 1 from the intermediate carrier 21, and place the replacement cell 8 at the position vacated after the defective cell 1 is removed.

[0134] The first-side carrier 22 is further configured to move and reset towards the middle carrier 21, such that the first-side edge of the replacement cell 8 is superposed with the first-side adjacent cell 2, and the first replacement film strip 9 enters between the replacement cell 8 and the first-side adjacent cell 2. The second-side carrier 23 is further configured to move and reset towards the middle carrier 21, such that the second-side edge of the replacement cell 8 is superposed with the second-side adjacent cell 3, and the second replacement film strip 10 enters between the replacement cell 8 and the second-side adjacent cell 3.

[0135] The welding mechanism is configured to weld the welding tapes in the first welding tape group 4 and the first replacement welding tape group 11 to each other one by one, and to weld the welding tapes in the second welding tape group 5 and the second replacement welding tape group 12 to each other one by one.

[0136] With reference to Figures 4 to 8 , the optional working process of the repair device in the embodiment of the present application is as follows;

[0137] First, place the first surface of the stacked cell string to be repaired face up on the repair table 20. Among them, the defective cell 1 is located on the middle carrier 21, the cell on the first side of the defective cell 1 is located on the first-side carrier 22, and the cell on the second side of the defective cell 1 is located on the second-side carrier 22.

[0138] Control the middle carrier 21 to heat the defective cell 1 located thereon, such that the first welding tape group 4 and the second welding tape group 5 welded to the defective cell 1 are desoldered from the defective cell 1.

[0139] Next, press the first-side film strip 6 and the second-side film strip 7 on both sides of the defective cell 1 against the defective cell 1 respectively through the first pressing mechanism 30 and the second pressing mechanism 40.

[0140] Subsequently, drive the first-side adjacent cell 2 and the second-side adjacent cell 3 located on both sides of the defective cell 1 to move away from the defective cell 1 respectively through the first-side carrier 22 and the second-side carrier 23, so that the first-side film strip 6 and the second-side film strip 7 are respectively separated from the first-side adjacent cell 2 and the second-side adjacent cell 3, and the first welding tape group 4 and the second welding tape group 5 are partially withdrawn from the defective cell 1.

[0141] Subsequently, cut the first welding tape group 4 and the second welding tape group 5 through the shearing mechanism 50, and remove the defective cell 1 with the first-side film strip 6, the second-side film strip 7, the first welding tape group 4, and the second welding tape group 5 cut off from the stacked cell string through the handling mechanism.

[0142] Finally, the replacement cell 8 with the first replacement film strip 9, the second replacement film strip 10, the first replacement solder tape group 11 and the second replacement solder tape group 12 is transported by the handling mechanism to the position vacated after the defective cell 1 is removed, and the replacement cell 8 is welded into the laminated cell string by the welding mechanism, thereby completing the repair of the laminated cell string.

[0143] Optionally, after partially pulling out the first solder tape group 4 and the second solder tape group 5 from the defective cell 1 and before removing the defective cell 1 with the first side film strip 6, the second side film strip 7, the first solder tape group 4 and the second solder tape group 5 cut off from the laminated cell string, the heating of the defective cell 1 by the intermediate carrier 21 is turned off, so that the first solder tape group 4 and the second solder tape group 5 are re-welded to the defective cell, and the first side film strip 6 and the second side film strip 7 are re-bonded to the defective cell. Thus, the handling mechanism only needs to pick up the defective cell by adsorption, and can smoothly remove the first side film strip 6, the second side film strip 7, the first solder tape group 4 and the second solder tape group 5 together.

[0144] The repair device in the embodiment of the present application realizes the automatic repair of the laminated cell string.

[0145] Optionally, a heating component is arranged in the intermediate carrier 22, and the intermediate carrier 22 heats the defective cell through the heating component. The heating component is, for example, a heating rod and a thermocouple inserted into the intermediate carrier 22. Among them, the heating rod is used to heat the intermediate carrier 22, and the thermocouple is used to implement temperature monitoring to ensure that the heating rod heats the intermediate carrier 22 to a predetermined temperature.

[0146] Optionally, an adsorption hole is arranged at the end of the first side carrier 22 close to the intermediate carrier 21, and the first side carrier 22 adsorbs the first side adjacent cell 2 through the adsorption hole. This can ensure that when the first side carrier 22 moves away from the intermediate carrier 21, the first side adjacent cell 2 can move with the first side carrier 22 and thus separate from the defective cell 1.

[0147] Similarly, an adsorption hole is arranged at the end of the second side carrier 23 close to the intermediate carrier 21, and the second side carrier 23 adsorbs the second side adjacent cell 3 through the adsorption hole. This can ensure that when the second side carrier 23 moves away from the intermediate carrier 21, the second side adjacent cell 3 can move with the second side carrier 23 and thus separate from the defective cell 1.

[0148] Since the first side edge of the defective cell 1 is stacked on the upper side of the second side edge of the first-side adjacent cell 2, to prevent excessive stress at the overlapping position of the defective cell 1 and the first-side adjacent cell 2 when the first pressing mechanism 30 presses down on the first side edge of the defective cell 1, which may cause damage to the first side edge of the defective cell 1 and the second side edge of the first-side adjacent cell 2. Optionally, as Figure 11 and Figure 12 shown, the first side edge of the defective cell 1 extends out of the middle bearing platform 21 and is stacked on the upper side of the first-side adjacent cell 2, and the initial position height of the first-side bearing platform 22 is lower than that of the middle bearing platform 21. The initial position of the first-side bearing platform 22 described here refers to the position of the first-side bearing platform 22 when the stack of cells to be repaired is placed on the repair platform 20.

[0149] To ensure that the second pressing mechanism 40 can press the second-side film strip 7 onto the defective cell 1 and prevent the position of the defective cell 1 pressed by the second pressing mechanism 40 from being suspended, which may cause damage to the defective cell 1. Optionally, the second side edge of the defective cell 1 is borne on the middle bearing platform 21, the first side edge of the second-side adjacent cell 3 extends out of the second-side bearing platform 23 and is stacked on the upper side of the defective cell 1, and the initial position height of the second-side bearing platform 23 is not lower than that of the middle bearing platform 22. For example, the initial position of the second-side bearing platform 23 is higher than that of the middle bearing platform 22 or flush with the middle bearing platform 22, so as to reduce the stress between the overlapping part of the second-side adjacent cell 3 and the defective cell 1. Similarly, the initial position of the second-side bearing platform 23 described here refers to the position of the second-side bearing platform 23 when the stack of cells to be repaired is placed on the repair platform 20.

[0150] Optionally, the structures of the first pressing mechanism 30 and the second pressing mechanism 40 are the same. Taking the first pressing mechanism 30 as an example, in an optional embodiment, as Figures 10 to 12 shown, the first pressing mechanism 30 includes a plurality of pressing heads 31 arranged at intervals along the width direction of the repair platform 20 (the direction shown by the arrow in the figure). Each pressing head 31 in the first pressing mechanism 30 presses down on the first side edge of the defective cell 1 while avoiding the solder tapes in the first solder tape group 4. In this way, on the one hand, it ensures that the first pressing mechanism 30 can press the first-side film strip 6 onto the defective cell 1; on the other hand, since the first solder tape group 4 is not pressed by the first pressing mechanism 30, when the first-side bearing platform 22 moves away from the middle bearing platform 21, the first solder tape group 4 can be partially withdrawn from the defective cell 1.

[0151] Similarly, each pressure head 31 in the second pressing mechanism 40 avoids the solder tapes in the second solder tape group 5 and presses the second side film strip 7 downward. In this way, on the one hand, it ensures that the second pressing mechanism 40 can press the second side film strip 7 onto the defective cell 1; on the other hand, since the second solder tape group 5 is not pressed by the second pressing mechanism 40, when the second side bearing platform 23 moves away from the middle bearing platform 21, the second solder tape group 5 can be partially withdrawn from the defective cell 1.

[0152] Optionally, both the first pressing mechanism 30 and the second pressing mechanism 40 have a driving assembly for driving a plurality of pressure heads 31 to lift and lower to perform the pressing action.

[0153] Still taking the first pressing mechanism 30 as an example, in another optional embodiment, the first pressing mechanism 30 includes a pressing plate, and a plurality of pressing teeth are arranged at intervals along the width direction of the repair table 20 at the bottom of the pressing plate. Each pressing tooth in the first pressing mechanism 30 avoids the solder tapes in the first solder tape group 4 and presses the first side edge of the defective cell 1 downward. Similarly, each pressing tooth in the second pressing mechanism 40 avoids the solder tapes in the second solder tape group 5 and presses the second side film strip 7 downward.

[0154] Similarly, both the first pressing mechanism 30 and the second pressing mechanism 40 respectively have a driving assembly for driving the pressing plate to lift and lower to perform the pressing action.

[0155] Optionally, the first side bearing platform 22 is configured to be able to drive the first side adjacent cell 2 to lift relative to the defective cell 1, and drive the first side adjacent cell 2 to translate toward or away from the defective cell 1.

[0156] By setting the first side bearing platform 22, after the first pressing mechanism 30 presses the first side film strip 6 onto the defective cell 1, the first side bearing platform 22 can drive the first side adjacent cell 2 to translate away from the defective cell 1, so that the first side film strip 6 is separated from the first side adjacent cell 2, and the first solder tape group 4 can be partially withdrawn from the defective cell 1. When the handling mechanism places the replacement cell 8 at the position vacated after the defective cell 1 is removed, the first side bearing platform 22 can drive the first side adjacent cell 2 to translate and reset toward the replacement cell 8, so that the first side edge of the replacement cell 8 coincides with the first side adjacent cell 2, and the first replacement film strip 9 enters between the replacement cell 8 and the first side adjacent cell 2. In addition, since the first side bearing platform 22 can drive the first side adjacent cell 2 to lift relative to the defective cell 1, before the shearing mechanism 50 cuts the first solder tape group 4 between the defective cell 1 and the first side adjacent cell 2, the first side bearing platform 22 can drive the first side adjacent cell 2 to descend relative to the defective cell 1, so as to leave enough shearing space for the shearing mechanism 50 and facilitate the shearing mechanism 50 to perform the shearing of the first solder tape group 4.

[0157] Similarly, the second-side carrier 23 is configured to be able to drive the second-side adjacent solar cell 3 to move up and down relative to the defective solar cell 1, and to drive the second-side adjacent solar cell 3 to translate toward or away from the defective solar cell 1.

[0158] By setting the second-side carrier 23, after the second pressing mechanism 40 presses the second-side film strip 7 onto the defective solar cell 1, the second-side carrier 23 can drive the second-side adjacent solar cell 3 to translate away from the defective solar cell 1, so that the second-side film strip 7 is separated from the second-side adjacent solar cell 3, and a part of the second solder ribbon group 5 is pulled out from the defective solar cell 1. When the handling mechanism places the replacement solar cell 8 at the position vacated after the defective solar cell 1 is removed, the second-side carrier 23 can drive the second-side adjacent solar cell 3 to translate and reset toward the replacement solar cell 8, so that the second-side edge of the replacement solar cell 8 coincides with the second-side adjacent solar cell 3, and the second replacement film strip 10 enters between the replacement solar cell 8 and the second-side adjacent solar cell 3. In addition, since the second-side carrier 23 can drive the second-side adjacent solar cell 3 to move up and down relative to the defective solar cell 1, before the shearing mechanism 50 cuts the second solder ribbon group 5 between the defective solar cell 1 and the second-side adjacent solar cell 3, the second-side carrier 23 can drive the second-side adjacent solar cell 3 to rise relative to the defective solar cell 1, so as to leave enough large shearing space for the shearing mechanism 50 to facilitate the shearing mechanism 50 to cut the second solder ribbon group 5.

[0159] As Figure 14 shown, optionally, the repair device in the embodiment of the present application further includes a solder ribbon clamping mechanism 60. The solder ribbon clamping mechanism 60 is configured to clamp the solder ribbons in the first solder ribbon group 4 and the first replacement solder ribbon group 11 together one by one, and is configured to clamp the solder ribbons in the second solder ribbon group 5 and the second replacement solder ribbon group 12 together one by one.

[0160] Before the welding mechanism welds the solder ribbons in the first solder ribbon group 4 and the first replacement solder ribbon group 11 together one by one, the solder ribbon clamping mechanism 60 clamps the solder ribbons in the first solder ribbon group 4 and the first replacement solder ribbon group 11 together one by one, so as to ensure that the solder ribbons in the first solder ribbon group 4 and the first replacement solder ribbon group 11 can be welded firmly one by one, preventing missed welding and false welding.

[0161] Similarly, before the welding mechanism welds the solder ribbons in the second solder ribbon group 5 and the second replacement solder ribbon group 12 together one by one, the solder ribbon clamping mechanism 60 clamps the solder ribbons in the second solder ribbon group 5 and the second replacement solder ribbon group 12 together one by one, so as to ensure that the solder ribbons in the second solder ribbon group 5 and the second replacement solder ribbon group 12 can be welded firmly one by one, preventing missed welding and false welding.

[0162] As Figure 15As shown, optionally, the solder ribbon clamping mechanism 60 includes a moving module (not shown in the figure), a mounting bracket 61, a first moving bracket 62 and a second moving bracket 63, wherein:

[0163] The mounting bracket 61 is connected to the driving end of the moving module, and the moving module is used to drive the mounting bracket 61 to move.

[0164] The first moving bracket 62 and the second moving bracket 63 are oppositely arranged on the mounting bracket 61, and the first moving bracket 62 and the second moving bracket 63 are configured to be able to move relative to each other.

[0165] A plurality of first chucks 64 are arranged on the first moving bracket 62, and each first chuck 64 is connected to the first moving bracket 62 through a first floating connecting piece so as to be able to float up and down and extend downward from the first moving bracket 62. A plurality of second chucks 65 corresponding to the first chucks 64 one by one are arranged on the second moving bracket 63, and each second chuck 65 is connected to the second moving bracket 63 through a second floating connecting piece so as to be able to float up and down and extend downward from the second moving bracket 63. Each first chuck 64 and the corresponding second chuck 65 form a solder ribbon clamping assembly, and a welding avoidance hole is arranged on the solder ribbon clamping assembly.

[0166] When the moving module drives the mounting bracket 61 to descend, the first chucks 64 and the second chucks 65 of each solder ribbon clamping assembly can adaptively float up and down after being stressed at the bottom (i.e., after contacting the battery cell or the solder ribbon group), so as to finally make the heights of all the first chucks 64 and the second chucks 65 consistent. Then, through the relative movement of the first moving bracket 62 and the second moving bracket 63, the first chucks 64 cooperate with the corresponding second chucks 65 to clamp the two solder ribbons to be welded, so that the two solder ribbons to be welded are overlapped. The two solder ribbons to be welded are one solder ribbon in the first solder ribbon group 4 and one solder ribbon in the first replacement solder ribbon group 11, or one solder ribbon in the second solder ribbon group 5 and one solder ribbon in the second replacement solder ribbon group 12.

[0167] As Figure 16 shown, optionally, the bottom surfaces of the clamping ends of the first chuck 64 and the second chuck 65 are both stepped surfaces, and the stepped surface includes a first bottom surface 643, a second bottom surface 644 and a side vertical surface 645. Among them, the second bottom surface 644 is lower than the first bottom surface 643, and the side vertical surface 645 is located between the first bottom surface 643 and the second bottom surface 644.

[0168] The side vertical surfaces 645 of the first chuck 64 and the second chuck 65 are opposite to each other, and the side vertical surfaces 645 of the first chuck 64 and the second chuck 65 approach or move away from each other as the first moving bracket 62 and the second moving bracket 63 move relative to each other.

[0169] The clamping and overlapping process of the first clamping head 64 and the second clamping head 65 for the first solder tape to be overlapped (for example, one solder tape in the first solder tape group 4) and the second solder tape (for example, one solder tape in the first replacement solder tape group 11) is as follows: When the moving module drives the mounting bracket 61 to descend, the first bottom surface 643 of the first clamping head 64 and the first bottom surface 643 of the second clamping head 65 are respectively pressed against the first solder tape and the second solder tape to be welded. When the first moving frame 62 and the second moving frame 63 move relative to each other, the side vertical surfaces 645 of the first clamping head 64 and the side vertical surfaces 645 of the second clamping head 65 clamp the pressed first solder tape and second solder tape, so that the first solder tape and the second solder tape are horizontally overlapped together.

[0170] Continue to refer to Figure 16 As shown, the clamping end of the first clamping head 64 is provided with a first avoidance hole 641, and the clamping end of the second clamping head 65 is provided with a second avoidance hole 651. The first avoidance hole 641 and the second avoidance hole 651 jointly enclose a welding avoidance hole. When the side vertical surfaces 645 of the first clamping head 64 and the side vertical surfaces 645 of the second clamping head 65 clamp the pressed first solder tape and second solder tape, the overlapping part of the first solder tape and the second solder tape is exposed by the welding avoidance hole. The welding mechanism can pass through the first avoidance hole 641 and the second avoidance hole 651 to implement welding on the overlapping part of the first solder tape and the second solder tape.

[0171] Of course, the solder tape clamping mechanism 60 can also adopt a solder tape clamping mechanism with other existing structures, as long as it can clamp the solder tapes in the first solder tape group 4 and the first replacement solder tape group 11 together one by one, and can clamp the solder tapes in the second solder tape group 5 and the second replacement solder tape group 12 together one by one.

[0172] As Figures 17 to 19 As shown, optionally, the shearing mechanism 50 includes a moving mechanism (not shown in the figure), a cutter seat 52, a fixed cutter 53, a movable cutter 54 and a cutter driving part 55, where:

[0173] The cutter driving part 55 is connected to the cutter seat 52, the cutter seat 52 is connected to the movable part of the moving mechanism, and the moving mechanism is used to drive the cutter seat 52 to translate and lift.

[0174] The fixed cutter 53 is fixedly connected to the cutter seat 52. A plurality of hook-shaped cutters 56 are arranged side by side at intervals on the lower side edge of the fixed cutter 53. A support inclined surface 561 for supporting the solder tape is formed on the hook-shaped part of the hook-shaped cutter 56, and a first cutting edge 562 is formed at the upper end of the support inclined surface 561.

[0175] The movable cutter 54 is slidably connected to the cutter seat 52 and fits with the fixed cutter 53. A second cutting edge 541 is formed at the lower side edge of the movable cutter 54.

[0176] The driving end of the cutter driving unit 55 is connected to the movable cutter 54 , and the cutter driving unit 55 is used to drive the movable cutter 54 to slide relative to the fixed cutter 53 , so as to realize the position switching of the movable cutter 54 between the avoidance position and the cutting position.

[0177] When the movable cutter 54 slides to the avoidance position, a gap is formed between each supporting inclined surface 561 and the second blade 541 for the welding strip to pass through.

[0178] When the movable cutter 54 slides to the cutting position, the second blade 541 cooperates with each first blade 562 to cut the welding strip passing therebetween.

[0179] Taking the shearing process of the first welding ribbon group 4 as an example, the optional working process of the shearing mechanism 50 is as follows:

[0180] In the initial state, the cutter seat 52 and the components thereon are away from the first welding ribbon group 4. The movable cutter 54 is in the avoidance position, and a gap is formed between the supporting inclined surface 561 of each hook-shaped knife 56 and the second blade 541 of the movable cutter 54 for the welding ribbon to pass through.

[0181] When it is necessary to cut the first welding strip group 4, the moving mechanism drives the cutter seat 52 to move, so that each hook-shaped knife 56 moves to above the area between two adjacent welding strips in the first welding strip group 4, and the first blade 562 of the hook-shaped knife 56 is located directly above the position to be cut of the corresponding welding strip. Then the moving mechanism drives the cutter seat 52 to descend, so that each hook-shaped knife 56 passes downward through two adjacent welding strips.

[0182] Next, the moving mechanism drives the cutter seat 52 to translate perpendicularly to the length direction of the welding strip, so that each hook-shaped knife 56 moves to the bottom of the corresponding welding strip, the welding strip is supported on the supporting inclined surface 561 of the hook-shaped knife 56, and the position of the welding strip to be cut rests on the first blade 562.

[0183] Finally, the cutter driving unit 55 drives the movable cutter 54 to slide downward to the cutting position, and the second blade 541 of the movable cutter 54 cooperates with the first blade 562 of each hook-shaped knife 56 to cut the welding strip passing therebetween.

[0184] The cutter driving unit 55 may adopt various existing driving mechanisms capable of driving the movable cutter 54 to slide up and down relative to the fixed cutter 53 .

[0185] Of course, the shearing mechanism 50 may also adopt existing shearing mechanisms of other structures, as long as it can shear the first welding ribbon group 4 and the second welding ribbon group 5 .

[0186] like Figure 8 middle Figure 9As shown, optionally, the repair device in the embodiments of the present application further includes a heating mechanism 70 that can be moved above the intermediate carrier 21 to cooperate with the intermediate carrier 21 to heat the defective cell 1.

[0187] The heating mechanism 70 cooperates with the intermediate carrier 21 to heat the defective cell, which can accelerate the desoldering of the defective cell 1 and the first solder tape group 4 and the second solder tape group 5 welded thereon, thereby accelerating the working rhythm and improving the repair efficiency. After completing the heating and desoldering of the first solder tape group 4 and the second solder tape group 5, the heating mechanism 70 moves away from the intermediate carrier 21 to an avoidance position to avoid interfering with the shearing mechanism and the welding structure.

[0188] The heating mechanism 70 can adopt various existing heating mechanisms such as an infrared lamp box that can heat the defective cell 1.

[0189] When the repair device is provided with the heating mechanism 70, the first pressing mechanism 30 and the second pressing mechanism 40 can be integrally installed on the heating mechanism 70. In this way, the first pressing mechanism 30 and the second pressing mechanism 40 can be synchronously moved above the intermediate carrier 21 along with the heating mechanism 70. When the heating mechanism 70 cooperates with the intermediate carrier 21 to complete the heating of the defective cell 1, the first pressing mechanism 30 and the second pressing mechanism 40 immediately press the first side film strip 6 and the second side film strip 7. In this way, the working rhythm can be accelerated, the working efficiency can be improved, and the structural complexity and equipment cost of the equipment can be reduced.

[0190] Of course, the first pressing mechanism 30 and the second pressing mechanism 40 can also be installed on an additionally provided driving mechanism, and the driving mechanism drives the first pressing mechanism 30 and the second pressing mechanism 40 above the intermediate carrier 21 so that the first pressing mechanism 30 and the second pressing mechanism 40 press the first side film strip 6 and the second side film strip 7.

[0191] The handling mechanism in the embodiments of the present application can adopt various existing mechanisms that can handle cells. For example, the handling mechanism is a moving part and a suction cup assembly connected to the moving part. The moving part drives the suction cup assembly to move, so as to drive the suction cup assembly to suck the cut defective cell 1 from the intermediate carrier 21, transport the defective cell 1 to the recycling station, and suck the replacement cell 8 from the feeding station and transport the replacement cell 8 to the intermediate carrier 21.

[0192] This application has been described in sufficient detail with certain particularities. Those of ordinary skill in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within the protection scope of this application. The scope of protection required by this application is defined by the claims described herein, rather than by the above descriptions in the embodiments. On the premise of no contradiction, some optional components in one embodiment can also be used in another embodiment, and some preferred structures of the same component in one embodiment are also applicable to another embodiment. In addition, there may be slight differences in the literal expressions of the names of certain components in different embodiments, and these slight differences will not affect the understanding of the technical solutions of this specification by those skilled in the art.

Claims

1. A laminated battery string repair method, characterized in that: For replacing defective cells in a laminated cell string, the laminated cell string is formed by welding a plurality of cells through a plurality of welding ribbon groups, and the laminated cell string repair method comprises: Providing a laminated battery string containing defective battery cells to be repaired, wherein the first surface of the laminated battery string faces upward; Heating the defective battery cell so that the first welding ribbon group welded on the second surface of the defective battery cell and the second welding ribbon group welded on the first surface of the defective battery cell are de-soldered from the defective battery cell, wherein the first welding ribbon group is also welded on the first surface of the battery cell adjacent to the first side, and the second welding ribbon group is also welded on the second surface of the battery cell adjacent to the second side; Pressing a first side film strip onto the defective cell, and pressing a second side film strip onto the defective cell, wherein the first side film strip is a film strip located between the defective cell and the first side adjacent cell, and the second side film strip is a film strip located between the defective cell and the second side adjacent cell; Controlling the first side adjacent battery cell and the second side adjacent battery cell to move away from the defective battery cell, so that the first side film strip is separated from the first side adjacent battery cell, the second side film strip is separated from the second side adjacent battery cell, and the first welding ribbon group and the second welding ribbon group are partially pulled away from the defective battery cell; Cutting off the first welding ribbon group between the defective battery cell and the battery cell adjacent to the first side, and cutting off the second welding ribbon group between the defective battery cell and the battery cell adjacent to the second side, and removing the defective battery cell with the first side film strip, the second side film strip, the first welding ribbon group and the second welding ribbon group; Place the replacement battery sheet with the first surface facing upwards at the position vacated after the defective battery sheet is removed, wherein a first replacement film strip is bonded to the first side edge of the replacement battery sheet, a second replacement film strip is bonded to the second side edge of the replacement battery sheet, a first replacement welding tape group is welded to the second surface of the replacement battery sheet, and a second replacement welding tape group is welded to the first surface of the replacement battery sheet; Control the first side adjacent battery sheet to move and reset toward the replacement battery sheet, so that the first side edge of the replacement battery sheet overlaps with the first side adjacent battery sheet, and the first replacement film strip enters between the replacement battery sheet and the first side adjacent battery sheet; and control the second side adjacent battery sheet to move and reset toward the replacement battery sheet, so that the second side edge of the replacement battery sheet overlaps with the second side adjacent battery sheet, and the second replacement film strip enters between the replacement battery sheet and the second side adjacent battery sheet; The first welding ribbon group and the welding ribbons in the first replacement welding ribbon group are welded together in a one-to-one correspondence, and the second welding ribbon group and the welding ribbons in the second replacement welding ribbon group are welded together in a one-to-one correspondence.

2. The laminated battery string repair method according to claim 1, characterized in that: Before cutting the first welding ribbon group between the defective cell and the first side adjacent cell, the stacked cell string repair method further includes: controlling the first side adjacent cell to descend relative to the defective cell so that a height difference is generated between the first side adjacent cell and the defective cell; before, after or simultaneously controlling the first side adjacent cell to move toward the replacement cell to reset, the stacked cell string repair method further includes: controlling the first side adjacent cell to rise and return to its original position; Before cutting off the second welding ribbon group between the defective cell and the second side adjacent cell, the stacked cell string rework method further includes: controlling the second side adjacent cell to rise relative to the defective cell so as to generate a height difference between the second side adjacent cell and the defective cell; before, after or while controlling the second side adjacent cell to move toward the replacement cell to reset, the stacked cell string rework method further includes: controlling the second side adjacent cell to descend back to its original position.

3. The laminated battery string repair method according to claim 2, characterized in that: The cutting off of the first welding ribbon group between the defective battery cell and the first side adjacent battery cell comprises: cutting off the first welding ribbon group from directly above the first side adjacent battery cell, the end of the first welding ribbon group remaining on the first side adjacent battery cell is tilted upward, and a first insertion gap is formed between the end of the first welding ribbon group and the first side adjacent battery cell, and when the first side edge of the replacement battery cell is overlapped with the first side adjacent battery cell, the first replacement film strip enters the first insertion gap; The method of cutting off the second solder ribbon group between the defective battery cell and the battery cell adjacent to the second side includes: cutting the second solder ribbon group from directly above the defective battery cell; the second replacement solder ribbon group on the replacement battery cell is tilted upward toward the end of the battery cell adjacent to the second side to form a second insertion gap between the replacement battery cell, and the second replacement film strip is located in the second insertion gap.

4. The laminated battery string repair method according to claim 1, characterized in that: The pressing the first side film strip onto the defective battery cell comprises: avoiding the first side adjacent battery cell and the first welding ribbon group and pressing the first side edge of the defective battery cell, so that the first side edge of the defective battery cell presses the first side film strip; The pressing the second side film strip onto the defective battery cell includes: avoiding the second side adjacent battery cell and the second welding ribbon group and pressing the second side film strip onto the defective battery cell.

5. The laminated battery string repair method according to claim 1, characterized in that: Before welding the first welding ribbon group and the welding ribbons in the first replacement welding ribbon group together in a one-to-one correspondence, the laminated battery string repair method further includes: clamping the first welding ribbon group and the welding ribbons in the first replacement welding ribbon group together in a one-to-one correspondence; Before welding the second welding ribbon group and the welding ribbons in the second replacement welding ribbon group together in a one-to-one correspondence, the laminated battery string repair method further includes: clamping the second welding ribbon group and the welding ribbons in the second replacement welding ribbon group together in a one-to-one correspondence.

6. The laminated battery string repair method according to claim 1, characterized in that: The welding method is any one of laser welding, infrared welding, hot air heating welding and electromagnetic induction welding.

7. A repair device, characterized in that: The stacked battery string repair method according to any one of claims 1 to 6, wherein the repair device comprises a repair station, a first clamping mechanism, a second clamping mechanism, a shearing mechanism, a transport mechanism and a welding mechanism, wherein: The rework station includes a first side loading platform, a middle loading platform, and a second side loading platform, wherein the middle loading platform is used to load defective battery cells in a laminated battery string, the first side loading platform is located on a first side of the middle loading platform, the first side loading platform is used to load battery cells in the laminated battery string located on a first side of the defective battery cells, the second side loading platform is located on a second side of the middle loading platform, and the second side loading platform is used to load battery cells in the laminated battery string located on a second side of the defective battery cells; The intermediate carrier is configured to heat the defective battery cell; The first pressing mechanism is configured to press the first side film strip onto the defective battery cell, and the second pressing mechanism is configured to press the second side film strip onto the defective battery cell; The first side loading platform and the second side loading platform are configured to move away from the middle loading platform so that the first side film strip is separated from the first side adjacent battery sheet, the second side film strip is separated from the second side adjacent battery sheet, and the first welding ribbon group and the second welding ribbon group are partially pulled away from the defective battery sheet; The shearing mechanism is configured to shear off the first welding ribbon group between the defective battery cell and the battery cell adjacent to the first side, and to shear off the second welding ribbon group between the defective battery cell and the battery cell adjacent to the second side; The transport mechanism is configured to move the defective battery cell away from the intermediate carrier and place the replacement battery cell at a position vacated after the defective battery cell is removed; The first side loading platform is further configured to move and reset toward the middle loading platform, so that the first side edge of the replacement battery sheet overlaps with the first side adjacent battery sheet, and the first replacement film strip enters between the replacement battery sheet and the first side adjacent battery sheet; the second side loading platform is further configured to move and reset toward the middle loading platform, so that the second side edge of the replacement battery sheet overlaps with the second side adjacent battery sheet, and the second replacement film strip enters between the replacement battery sheet and the second side adjacent battery sheet; The welding mechanism is configured to weld the first welding ribbon group and the welding ribbons in the first replacement welding ribbon group together in a one-to-one correspondence, and to weld the second welding ribbon group and the welding ribbons in the second replacement welding ribbon group together in a one-to-one correspondence.

8. The repair device according to claim 7, characterized in that: The first side edge of the defective battery cell extends out of the middle loading platform and overlaps the upper side of the first side adjacent battery cell, and the initial position height of the first side loading platform is lower than that of the middle loading platform; The second side edge of the defective battery cell is carried on the middle carrying platform, the first side edge of the second side adjacent battery cell extends out of the second side carrying platform and overlaps the upper side of the defective battery cell, and the initial position height of the second side carrying platform is not lower than that of the middle carrying platform.

9. The repair device according to claim 7, characterized in that: The first pressing mechanism and the second pressing mechanism have the same structure, the first pressing mechanism comprises a plurality of pressing heads arranged at intervals along the width direction of the rework station, each of the pressing heads in the first pressing mechanism avoids each of the welding strips in the first welding strip group and presses down the first side edge of the defective battery sheet, and each of the pressing heads in the second pressing mechanism avoids each of the welding strips in the second welding strip group and presses down the second side film strip; or, The first pressing mechanism includes a pressing plate, and a plurality of pressing teeth arranged at intervals along the width direction of the rework station are provided at the bottom of the pressing plate. The pressing teeth in the first pressing mechanism avoid the solder strips in the first solder strip group and press the first side edge of the defective battery cell downward, and the pressing teeth in the second pressing mechanism avoid the solder strips in the second solder strip group and press the second side film strip downward.

10. The repair device according to claim 7, characterized in that: The first side loading platform is configured to be able to drive the first side adjacent battery cell to rise and fall relative to the defective battery cell, and to drive the first side adjacent battery cell to translate toward or away from the defective battery cell; The second side supporting platform is configured to be able to drive the second side adjacent battery cell to rise and fall relative to the defective battery cell, and to drive the second side adjacent battery cell to translate toward or away from the defective battery cell.

11. The repair device according to claim 7, characterized in that: The rework device also includes a solder strip clamping mechanism; The solder strip clamping mechanism is configured to clamp the first solder strip group and the solder strips in the first replacement solder strip group together in a one-to-one correspondence; and is configured to clamp the second solder strip group and the solder strips in the second replacement solder strip group together in a one-to-one correspondence.

12. The repair device according to claim 7, characterized in that: The repair device further includes a heating mechanism, which can be moved above the intermediate carrier to cooperate with the intermediate carrier to heat the defective battery cell.

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