Laminated battery string repair method

Abstract

The invention provides a laminated battery string repairing method, which comprises the following steps of: firstly, removing the adhesion between a first side film strip and a first welding strip group on a first side adjacent battery piece and between the first side film strip and a defective battery piece, and removing the adhesion between a second side film strip and a second welding strip group on the first surface of the defective battery piece and between a second side film strip and a second side adjacent battery piece. And then the first side adjacent battery piece and the second side adjacent battery piece are controlled to lift relative to the defective battery piece, so that the first side film strip is separated from the defective battery piece, and the second side film strip is separated from the second side adjacent battery piece. And then cutting off the first welding strip group and the second welding strip group between the defective battery piece and the first side adjacent battery piece and between the defective battery piece and the second side adjacent battery piece, and removing the cut defective battery piece. And finally, the replacement battery piece is welded to the vacant position after the defective battery piece is 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] This application relates to the field of photovoltaic cell production equipment, and specifically to a method for repairing a laminated battery string. Background Art

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

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

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

[0005] Currently, the commonly used method for repairing a battery string is mainly used for replacing and repairing a conventional battery string without a film strip and with non-overlapping adjacent cell pieces, and it is difficult to repair a laminated battery string with a film strip. Summary of the Invention

[0006] In view of the above technical problems, this 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 piece in the laminated battery string, the laminated battery string being formed by welding a plurality of cell pieces through a plurality of solder tape groups;

[0008] The method for repairing a laminated battery string includes:

[0009] Providing a laminated battery string containing a defective cell piece to be repaired, with the first surface of the laminated battery string facing upward;

[0010] Release the adhesion between the first side film strip located on the first surface of the first adjacent cell adjacent to the defective cell and the first solder ribbon group soldered to the first surface of the first adjacent cell adjacent to the defective cell, and release the adhesion between the first side film strip located on the second surface of the defective cell and the second surface of 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 first solder ribbon group is also soldered to the second surface of the defective cell;

[0011] Release the adhesion between the second side film strip located on the first surface of the defective cell and the second solder ribbon group soldered to the first surface of the defective cell, and release the adhesion between the second side film strip located on the second surface of the second adjacent cell adjacent to the defective cell and the second surface of the second adjacent cell, wherein the second side film strip is the film strip located between the defective cell and the second adjacent cell on the second side, and the second solder ribbon group is also soldered to the second surface of the second adjacent cell;

[0012] Control the first adjacent cell on the first side to descend relative to the defective cell so that the first side film strip disengages from the defective cell; control the second adjacent cell on the second side to ascend relative to the defective cell so that the second side film strip disengages from the second adjacent cell on the second side;

[0013] Cut the first solder ribbon group between the defective cell and the first adjacent cell on the first side, and cut the second solder ribbon group between the defective cell and the second adjacent cell on the second side, and remove the defective cell with the second side film strip, the first solder ribbon group and the second solder ribbon group;

[0014] Place the replacement cell with its first surface facing up at the position vacated after the defective cell is removed, wherein a second replacement film strip is adhered to the second side edge of the replacement cell, a first replacement solder ribbon group is soldered to the second surface of the replacement cell, and a second replacement solder ribbon group is soldered to the first surface of the replacement cell; or, tear the first side film strip from the first adjacent cell on the first side, and place the replacement cell with its first surface facing up at the position vacated after the defective cell is removed, wherein a first replacement film strip is adhered to the first side edge of the replacement cell, a second replacement film strip is adhered to the second side edge of the replacement cell, a first replacement solder ribbon group is soldered to the second surface of the replacement cell, and a second replacement solder ribbon group is soldered to the first surface of the replacement cell;

[0015] Control the first adjacent cell on the first side to ascend and reset so that the first side edge of the replacement cell coincides with the first adjacent cell on the first side, and the first side film strip or the first replacement film strip enters between the replacement cell and the first adjacent cell on the first side; and control the second adjacent cell on the second side to descend and reset so that the second side edge of the replacement cell coincides with the second adjacent cell on the second side, and the second replacement film strip enters between the replacement cell and the second adjacent cell on the second side;

[0016] Weld the solder ribbons in the first solder ribbon group and the first replacement solder ribbon group to each other one by one; and weld the solder ribbons in the second solder ribbon group and the second replacement solder ribbon group to each other one by one.

[0017] The method for repairing a stacked battery string provided by an embodiment of the present application first releases the adhesion between the first side film strip and the first solder ribbon group on the first side adjacent battery cell and the defective battery cell, and releases the adhesion between the second side film strip and the second solder ribbon group on the first surface of the defective battery cell and the second side adjacent battery cell. Then, control the first side adjacent battery cell and the second side adjacent battery cell to move up and down relative to the defective battery cell respectively, so that the first side film strip disengages from the defective battery cell and the second side film strip disengages from the second side adjacent battery cell. Then, cut off the first solder ribbon group and the second solder ribbon group between the defective battery cell and the first side adjacent battery cell and the second side adjacent battery cell, and remove the cut defective battery cell. Finally, weld the replacement battery cell to the position vacated after the defective battery cell is removed to complete the repair of the stacked battery string.

[0018] In some embodiments, releasing the adhesion between the first side film strip on the first surface of the first side adjacent battery cell and the first solder ribbon group welded on the first surface of the first adjacent battery cell includes: performing a de-bonding operation on the part of the first side film strip on the first surface of the first side adjacent battery cell that is adhered to the first solder ribbon group; releasing the adhesion between the first side film strip on the second surface of the defective battery cell and the second surface of the defective battery cell includes: performing a de-bonding operation on the first side film strip on the second surface of the defective battery cell. Releasing the adhesion between the second side film strip on the first surface of the defective battery cell and the second solder ribbon group welded on the first surface of the defective battery cell includes: performing a de-bonding operation on the bonding part between the second side film strip and the second solder ribbon group on the first surface of the defective battery cell; releasing the adhesion between the second side film strip on the second surface of the second side adjacent battery cell and the second surface of the second side adjacent battery cell includes: performing a de-bonding operation on the second side film strip on the second surface of the second side adjacent battery cell.

[0019] Only perform a de-bonding operation on the part of the first side film strip on the first surface of the first side adjacent battery cell that is adhered to the first solder ribbon group, ensuring that when the first side adjacent battery cell moves down relative to the defective battery cell, the first side film strip remains adhered to the first side adjacent battery cell, and the first solder ribbon group can smoothly disengage from the first side film strip, facilitating the cutting of the first solder ribbon group. Performing a de-bonding operation on the first side film strip on the second surface of the defective battery cell ensures that when the first side adjacent battery cell moves down relative to the defective battery cell, the first side film strip completely disengages from the defective battery cell.

[0020] Similarly, only the bonding part between the second side film strip on the first surface of the defective cell and the second solder ribbon group is debonded to ensure that when the second side adjacent cell rises relative to the defective cell, the second side film strip remains bonded to the defective cell, and the second solder ribbon group can smoothly separate from the first side film strip. Debonding the second side film strip on the second surface of the second side adjacent cell ensures that when the second side adjacent cell rises relative to the defective cell, the second side film strip completely separates from the second side adjacent cell.

[0021] In some embodiments, the debonding operation includes at least one of applying a debonding liquid, hot compressing, blowing hot air, or blowing cold air.

[0022] Applying a debonding liquid to the film strip directly reduces the viscosity of the adhesive on the film strip through chemical means, causing the film strip to lose its adhesiveness. Hot compressing the film strip or blowing hot air on the film strip will cause the adhesive on the film strip to melt due to heat, thereby causing the film strip to lose its adhesiveness. Blowing cold air on the film strip can cause the adhesive on the film strip to harden, thereby causing the film strip to lose its adhesiveness.

[0023] In some embodiments, the debonding liquid is at least one of hydrogen peroxide, glycerol, alcohol, acetone, and a degumming agent.

[0024] Several commonly used debonding liquids are provided, which can quickly reduce the viscosity of the adhesive on the film strip after being coated on the film strip.

[0025] In some embodiments, before tearing the first side film strip from the first side adjacent cell, the method for repairing the stacked cell string further includes: performing a debonding operation on the first side film strip bonded to the first surface of the first side adjacent cell.

[0026] Ensure that the first side film strip can be smoothly torn from the first side adjacent cell, avoiding damage to the first side cell.

[0027] In some embodiments, the debonding operation on the part of the first side film strip bonded to the first solder ribbon group on the first surface of the first side adjacent cell is carried out synchronously with the debonding operation on the first side film strip bonded to the first surface of the first side adjacent cell.

[0028] When the first side film strip needs to be torn from the first side adjacent cell, by synchronously performing the two debonding operations on the first side film strip on the first surface of the first side adjacent cell, the debonding operation can be simplified and the debonding efficiency can be improved.

[0029] In some embodiments, before removing the defective cell, the method for repairing the laminated cell string further includes: controlling the first-side adjacent cell and the second-side adjacent cell to translate a predetermined distance away from the defective cell; after placing the replacement cell with its first surface facing up at the position vacated after the defective cell is removed, the method for repairing the laminated cell string further includes: controlling the first-side adjacent cell and the second-side adjacent cell to translate and reset towards the replacement cell.

[0030] Since there is an overlap between the defective cell and the edges of the first-side adjacent cell and the second-side adjacent cell, by controlling the first-side adjacent cell and the second-side adjacent cell to translate a predetermined distance away from the defective cell before removing the defective cell, it can be ensured that the defective cell can be smoothly removed between the first-side adjacent cell and the second-side adjacent cell.

[0031] In some embodiments, cutting the first solder ribbon group between the defective cell and the first-side adjacent cell includes: cutting the first solder ribbon group directly above the first-side cell, leaving the end of the first solder ribbon group on the first-side adjacent cell tilted upward, and forming a first insertion gap between the first solder ribbon group and the first-side adjacent cell. The first side film strip is located in the first insertion gap, or when the first side edge of the replacement cell overlaps with the first-side adjacent cell, the first replacement film strip enters the first insertion gap; cutting the second solder ribbon group between the defective cell and the second-side adjacent cell 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-side 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.

[0032] By cutting the first solder ribbon group directly above the first-side adjacent cell, the subsequent overlapping 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 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 remaining on the first-side adjacent cell is tilted upward, thereby forming a first insertion gap between the first solder ribbon group and the first-side adjacent cell. Thus, when controlling the first-side adjacent cell to rise and reset towards the replacement cell, the first edge of the replacement cell can be inserted into the first insertion gap, thereby ensuring that the first replacement film strip on the replacement cell or the first film strip on the first adjacent cell can smoothly enter the overlapping position between the replacement cell and the first-side adjacent cell.

[0033] Similarly, by cutting the second solder tape group directly above the defective cell, the subsequent overlapping solder position between the second solder tape group and the second replacement solder tape 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 overlapping solder part can be located on the back surface of the photovoltaic module and will not be exposed. In addition, by setting the second replacement solder tape group on the replacement cell to be inclined upward toward the end of the second adjacent cell, a second insertion gap is formed between the end of the second replacement solder tape group and the replacement cell, and the second replacement film strip is located within the second insertion gap. In this way, when controlling the second adjacent cell to descend and reset toward the replacement cell, the first side edge of the second adjacent cell is inserted into the second insertion gap, and the second replacement film strip smoothly enters the overlapping position between the replacement cell and the second adjacent cell.

[0034] In some embodiments, before welding the solder tapes in the first solder tape group and the first replacement solder tape group together one by one, the method for repairing the laminated battery string further includes: clamping the solder tapes in the first solder tape group and the first replacement solder tape group together one by one; before welding the solder tapes in the second solder tape group and the second replacement solder tape group together one by one, the method for repairing the laminated battery string further includes: clamping the solder tapes in the second solder tape group and the second replacement solder tape group together one by one.

[0035] After clamping the solder tapes in the first solder tape group and the first replacement solder tape group together one by one and then performing welding, it can ensure that the solder tapes in the first solder tape group and the first replacement solder tape group can be welded together one by one and firmly, preventing missed welding and false welding. Similarly, after clamping the solder tapes in the second solder tape group and the second replacement solder tape group together one by one and then performing welding, it ensures that the solder tapes in the second solder tape group and the second replacement solder tape group can be welded together one by one and firmly, preventing missed welding and false welding.

[0036] In some embodiments, the welding method is any one of laser welding, infrared welding, hot air heating welding, and electromagnetic induction welding.

[0037] Several welding methods are provided, all of which can ensure that the solder tapes in the first solder tape group and the first replacement solder tape group can be welded together, and the solder tapes in the second solder tape group and the second replacement solder tape group can be welded together. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural diagram of a laminated battery string;

[0039] Figure 2 is a schematic diagram of the first surface of three consecutive cells in a laminated battery string;

[0040] Figure 3Schematic diagram of the second surface of three consecutive solar cells in a laminated solar cell string;

[0041] Figure 4 Schematic diagram of the debonding process from one perspective in an embodiment of the present application;

[0042] Figure 5 Schematic diagram of the debonding process from another perspective in an embodiment of the present application;

[0043] Figure 6 Schematic diagram after the first-side adjacent solar cell and the second-side adjacent solar cell descend and ascend relative to the defective solar cell respectively in an embodiment of the present application;

[0044] Figure 7 Schematic diagram of the shearing process of the second solder ribbon group between the defective solar cell and the second-side adjacent solar cell in an embodiment of the present application;

[0045] Figure 8 Schematic diagram of the structures of the first-side adjacent solar cell, the second-side adjacent solar cell and the replacement solar cell in an embodiment of the present application;

[0046] Figure 9 Schematic diagram of the structures of the first-side adjacent solar cell, the second-side adjacent solar cell and the replacement solar cell in another embodiment of the present application;

[0047] Figure 10 Schematic diagram of the clamping process of the first solder ribbon group and the first replacement solder ribbon group in an embodiment of the present application;

[0048] Figure 11 Schematic diagram of the structure of the clamping mechanism in an embodiment of the present application;

[0049] Figure 12 Schematic diagram of the clamping process of the first chuck and the second chuck cooperating to clamp two solderings to be welded in an embodiment of the present application;

[0050] Figure 13 Schematic diagram of the structure of the shearing mechanism in an embodiment of the present application;

[0051] Figure 14 Schematic diagram of the structure of the movable cutting tool in an embodiment of the present application;

[0052] Figure 15 Schematic diagram of the structure of the hook-shaped cutter in an embodiment of the present application.

[0053] Figures 1 to 15 It includes:

[0054] Defective cell 1, first-side adjacent cell 2, second-side adjacent cell 3, first solder strip group 4, second solder strip group 5, first-side film strip 6, second-side film strip 7, replacement cell 8, first replacement film strip 9, second replacement film strip 10, first replacement solder strip group 11, second replacement solder strip group 12;

[0055] First coating mechanism 20: mounting plate 21, coating head 22;

[0056] Second coating mechanism 30;

[0057] Film stripping mechanism 40: translation drive module 41, jaw assembly 42;

[0058] Shearing mechanism 50: cutter seat 52, fixed cutter 53, movable cutter 54, cutter drive part 55, hook-shaped cutter 56, second cutting edge 541, support inclined surface 561, first cutting edge 562;

[0059] Solder strip clamping mechanism 60: mounting frame 61, first moving frame 62, second moving frame 63, first chuck 64, second chuck 65, first avoidance hole 641, first bottom surface 643, second bottom surface 644, side vertical surface 645, second avoidance hole 651;

[0060] Cell 100, film strip 200, solder strip group 300. Detailed implementation mode

[0061] 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 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 only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0062] As described in the background art section, the currently commonly used battery string repair equipment and repair methods are mainly used for the replacement repair of conventional battery strings without film strips and with non-overlapping adjacent battery cells, and it is difficult to implement the repair of laminated battery strings with film strips.

[0063] For this reason, the present application provides a method for repairing a laminated battery string, which can automatically replace and repair defective battery cells in the laminated battery string.

[0064] For the sake of simplicity of illustration, Figure 4 only the defective cell 1 in the laminated battery string to be repaired, the first-side adjacent cell 2 located on the first side (such as the left side) of the defective cell 1 and the second-side adjacent cell 3 located on the second side (such as the right side) of the defective cell 1 are shown, where:

[0065] 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.

[0066] 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.

[0067] With reference to Figures 4 to 7 , the method for repairing a stacked battery string according to an embodiment of the present application includes the following steps:

[0068] S1. Provide a stacked battery string containing the defective cell 1 to be repaired, with the first surface of the stacked battery string facing upward.

[0069] S2. Release the adhesion between the first side film strip 6 on the first surface of the first adjacent cell 2 and the first solder ribbon group 4 welded to the first surface of the first adjacent cell 2, and release the adhesion between the first side film strip 6 on the second surface of the defective cell 1 and the second surface of the defective cell 1. Here, the first side film strip 6 is the film strip between the defective cell 1 and the first adjacent cell 2, and the first solder ribbon group 4 is also welded to the second surface of the defective cell 1.

[0070] S3. Release the adhesion between the second side film strip 7 on the first surface of the defective cell 1 and the second solder ribbon group 5 welded to the first surface of the defective cell 1, and release the adhesion between the second side film strip 7 on the second surface of the second adjacent cell 3 and the second surface of the second adjacent cell 3. Here, the second side film strip 7 is the film strip between the defective cell 1 and the second adjacent cell 3, and the second solder ribbon group 5 is also welded to the second surface of the second adjacent cell 3.

[0071] S4. Control the first adjacent cell 2 to descend relative to the defective cell 1 so that the first side film strip 6 disengages from the defective cell 1. Control the second adjacent cell 3 to ascend relative to the defective cell 1 so that the second side film strip 7 disengages from the second adjacent cell 3.

[0072] S5. Cut the first solder tape group 4 between the defective cell 1 and the first adjacent cell 2, and cut the second solder tape group 5 between the defective cell 1 and the second adjacent cell 3, and remove the defective cell 1 with the second side film strip 7, the first solder tape group 4 and the second solder tape group 5.

[0073] S6. Place the replacement cell 8 with its first surface facing up at the position vacated after the defective cell 1 is removed. Among them, a second replacement film strip 10 is bonded to the second side edge of the replacement cell 8, a first replacement solder tape group 11 is welded to the second surface of the replacement cell 8, and a second replacement solder tape group 12 is welded to the first surface of the replacement cell 8; or,

[0074] Tear the first side film strip 6 from the first adjacent cell 2, and place the replacement cell 8 with its first surface facing up at the position vacated after the defective cell 1 is removed. Among them, a first replacement film strip 9 is bonded to the first side edge of the replacement cell 8, a second replacement film strip 10 is bonded to the second side edge of the replacement cell 8, a first replacement solder tape group 11 is welded to the second surface of the replacement cell 8, and a second replacement solder tape group 12 is welded to the first surface of the replacement cell 8.

[0075] S7. Control the first adjacent cell 2 to rise and reset, so that the first side edge of the replacement cell 8 coincides with the first adjacent cell 2, and the first side film strip 6 or the first replacement film strip 9 enters between the replacement cell 8 and the first adjacent cell 2; and control the second adjacent cell 3 to descend and reset, so that the second side edge of the replacement cell 8 coincides with the second adjacent cell 3, and the second replacement film strip 10 enters between the replacement cell 8 and the second adjacent cell 3.

[0076] S8. Weld the solder tapes in the first solder tape group 4 and the first replacement solder tape group 11 to each other one by one; and weld the solder tapes in the second solder tape group 5 and the second replacement solder tape group 12 to each other one by one.

[0077] In step S1, the upward first surface of the stacked cell string is, for example, the back surface of the stacked cell string, that is, the non-light-receiving surface of the stacked cell string.

[0078] 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.

[0079] In step S4, as Figure 6As shown, the height by which the first-side adjacent cell 2 descends relative to the defective cell 1 is set according to specific circumstances, as long as it is ensured that the first-side film strip 6 can completely disengage from the defective cell 1 and the first solder ribbon group 4 on the first surface of the first-side adjacent cell 2. Similarly, the height by which the second-side adjacent cell 3 ascends relative to the defective cell 1 is set according to specific circumstances, as long as it is ensured that the second-side film strip 7 can completely disengage from the second-side adjacent cell 3 and the second solder ribbon group 5 on the first surface of the defective cell 1.

[0080] In step S5, after the first solder ribbon group 4 between the defective cell 1 and the first-side adjacent cell 2 is cut, the first solder ribbon 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 ribbon group 4 welded on the first surface of the first-side adjacent cell 2 remains on the first surface of the first-side adjacent cell 2 to be welded to the first replacement solder ribbon group 11 on the replacement cell 8, finally forming a new complete first solder ribbon group.

[0081] Similarly, after the second solder ribbon group 5 between the defective cell 1 and the second-side adjacent cell 3 is cut, the second solder ribbon 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 ribbon group 5 welded on the second surface of the second-side adjacent cell 3 remains on the second surface of the second-side adjacent cell 3 to be welded to the second replacement solder ribbon group 12 on the replacement cell 8, finally forming a new complete second solder ribbon group.

[0082] In step S6, whether to tear off the first-side film strip 6 from the first-side adjacent cell 2 depends on whether the continued use of the first-side film strip 6 after the debonding treatment is allowed. If the continued use of the first-side film strip 6 is allowed, there is no need to tear off the first-side film strip 6 from the first-side adjacent cell 2. Correspondingly, there is no need to pre-bond the first replacement film strip 9 on the replacement cell 8. Otherwise, it is necessary to tear off the first-side film strip 6 from the first-side adjacent cell 2. Correspondingly, it is necessary to pre-bond the first replacement film strip 9 on the replacement cell 8.

[0083] The repair method for the stacked battery string provided by the embodiment of the present application first releases the adhesion between the first side film strip 6 and the first solder tape group 4 on the first adjacent battery cell 2 and the defective battery cell 1 on the first side, and releases the adhesion between the second side film strip 7 and the second solder tape group 5 on the first surface of the defective battery cell 1 and the second adjacent battery cell 3 on the second side. Then, control the lifting and lowering of the first adjacent battery cell 2 and the second adjacent battery cell 3 relative to the defective battery cell 1, so that the first side film strip 6 detaches from the defective battery cell 1, and the second side film strip 7 detaches from the second adjacent battery cell 3 on the second side. Then, cut the first solder tape group 4 and the second solder tape group 5 between the defective battery cell 1 and the first adjacent battery cell 2 and the second adjacent battery cell 3, and remove the cut defective battery cell 1. Finally, weld the replacement battery cell 8 to the position vacated after the defective battery cell 1 is removed to complete the repair of the stacked battery string.

[0084] Optionally, the release of the adhesion between the first side film strip 6 on the first surface of the first adjacent battery cell 2 and the first solder tape group 4 welded on the first surface of the first adjacent battery cell 2 in step S2 is specifically: perform a debonding operation on the part of the first side film strip 6 adhered to the first solder tape group 4 on the first surface of the first adjacent battery cell 1. The release of the adhesion between the first side film strip 6 on the second surface of the defective battery cell 1 and the second surface of the defective battery cell 1 in step S2 includes: performing a debonding operation on the first side film strip 6 on the second surface of the defective battery cell 1.

[0085] That is to say, for the first side film strip 6 on the first surface of the first adjacent battery cell 2, only release the adhesion between it and the first solder tape group 4 on the first surface of the first adjacent battery cell 1, without releasing the adhesion between it and the first adjacent battery cell 1. For the first side film strip 6 on the second surface of the defective battery cell 1, completely release the adhesion between it and the second surface of the defective battery cell 1.

[0086] By operating in this way, it can be ensured that when controlling the first adjacent battery cell 2 to descend relative to the defective battery cell 1 in step S4, the first side film strip 6 remains adhered to the first adjacent battery cell 2, and the first solder tape group 4 can smoothly detach from the first side film strip 6, thus facilitating the cutting of the first solder tape group 4. At the same time, the first side film strip 6 can be smoothly detached from the defective battery cell 1.

[0087] Optionally, the release of the adhesion between the second side film strip 7 on the first surface of the defective cell 1 and the second solder strip group 5 welded to the first surface of the defective cell 1 in step S3 is specifically as follows: perform a debonding operation on the bonding part between the second side film strip 7 on the first surface of the defective cell 1 and the second solder strip group 5. The release of the adhesion between the second side film strip 7 on the second surface of the second side adjacent cell 3 and the second surface of the second side adjacent cell 3 in step S3 includes: performing a debonding operation on the second side film strip 7 on the second surface of the second side adjacent cell 3.

[0088] That is to say, for the second side film strip 7 on the first surface of the defective cell 1, only the adhesion between it and the second solder strip group 5 on the first surface of the defective cell 1 is released, and the adhesion between it and the defective cell 1 is not released. For the second side film strip 7 on the second surface of the second side adjacent cell 3, the adhesion between it and the second surface of the second side adjacent cell 3 is completely released.

[0089] By operating in this way, it can be ensured that when controlling the second side adjacent cell 3 to rise relative to the defective cell 1 in step S4, the second side film strip 7 remains adhered to the defective cell 1, and the second solder strip group 5 can smoothly separate from the second side film strip 7, thus facilitating the shearing of the second solder strip group 5. At the same time, the second side film strip 7 can be smoothly separated from the second side adjacent cell 3.

[0090] Optionally, in the embodiment of the present application, the debonding operation includes at least one of applying a debonding liquid, hot compress, blowing hot air or blowing cold air.

[0091] Among them, when applying a debonding liquid to the film strip, the debonding liquid directly reduces the viscosity of the adhesive on the film strip through a chemical method, so that the film strip loses its stickiness. Hot compressing the film strip or blowing hot air on the film strip will cause the adhesive on the film strip to melt due to heat, so that the film strip loses its stickiness. Blowing cold air on the film strip can cause the adhesive on the film strip to harden, so that the film strip loses its stickiness.

[0092] When the debonding operation is performed by applying a debonding liquid, the debonding liquid used is at least one of hydrogen peroxide, glycerin, alcohol, acetone and a degumming agent.

[0093] When the debonding operation is performed by applying a debonding liquid, in order to improve the debonding efficiency of the first side film strip 6 or the second side film strip 7, such as Figures 4 to 5As shown, the first coating mechanism 20 and the second coating mechanism 30 can be used to synchronously apply the demucoid on the upper and lower sides. Taking the demucoiding operation of the first side film strip 6 as an example, the first coating mechanism 20 applies the demucoid on the first side film strip 6 located on the first surface of the first side adjacent battery cell 2 from the upper side. At the same time, the second coating mechanism 30 applies the demucoid on the first side film strip 6 located on the second surface of the defective battery cell 1 from the lower side.

[0094] Optionally, the structures of the first coating mechanism 20 and the second coating mechanism 30 are the same. Taking the first coating mechanism 20 as an example, as Figure 4 shown, it includes a mounting plate and a plurality of coating heads 22 arranged side by side and spaced apart on the mounting plate 21. The number and spacing of the coating heads 22 are matched with the number and spacing of the solder tapes in each solder tape group in the stacked battery string. Still taking the demucoiding operation of the first side film strip 6 as an example, each coating head 22 in the first coating mechanism 20 corresponds to a solder tape in the first solder tape group 4. In this way, each coating head 22 in the first coating mechanism 20 can apply the demucoid to the first side film strip 6 at the corresponding solder tape one by one, so as to realize the "demucoiding operation on the part of the first side film strip 6 adhered to the first solder tape group 4 on the first surface of the first side adjacent battery cell 2" mentioned in the previous embodiment.

[0095] In order to enable the second coating mechanism 30 to comprehensively demucoid the first side film strip 6 on the second surface of the defective battery cell 1, when applying the demucoid on the first side film strip 6 on the second surface of the defective battery cell 1, the second coating mechanism 30 can be controlled to reciprocate in the width direction of the stacked battery string, so that the demucoid can be applied to the entire first side film strip 6 on the second surface of the defective battery cell 1.

[0096] Of course, only one coating mechanism can also be provided. After applying the demucoid on the first side film strip 6 on the first surface of the first side adjacent battery cell 2 from the upper side, then apply the demucoid on the first side film strip 6 on the second surface of the defective battery cell 1 from the lower side.

[0097] In other embodiments, other coating mechanisms and coating methods are also used to apply the demucoid to the first side film strip 6 or the second side film strip 7. For example, the demucoid is applied to the first side film strip 6 or the second side film strip 7 through a brush, a cotton brush, etc.

[0098] Similarly, in order to improve the demucoiding efficiency, when using demucoiding operation methods such as hot compress, hot air blowing or cold air blowing, a hot compress mechanism, a hot air blowing structure or a cold air blowing mechanism can be respectively arranged on the upper and lower sides of the film strip to be demucoided.

[0099] Optionally, before removing the first side film strip 6 from the first side adjacent cell 2 in step S6, the method for repairing a stacked battery string in the embodiments of the present application further includes:

[0100] Performing a debonding operation on the first side film strip 6 adhered to the first surface of the first side adjacent cell 2.

[0101] In this way, it can be ensured that the first side film strip 6 can be smoothly removed from the first side adjacent cell 2, avoiding damage to the first side adjacent cell 2.

[0102] The specific manner of the debonding operation may be the same as the operation manner in the previous embodiments, for example, applying a debonding liquid, hot compress, hot air blowing, cold air blowing, etc. to the first side film strip 6 adhered to the first surface of the first side adjacent cell 2.

[0103] Optionally, the debonding operation on the part of the first side film strip 6 adhered to the first solder tape group 4 on the first surface of the first side adjacent cell 2 is performed synchronously with the debonding operation on the first side film strip 4 adhered to the first surface of the first side adjacent cell 2.

[0104] That is to say, when it is not allowed to continue using the first side film strip 6 and it is necessary to remove the first side film strip 6 from the first side adjacent cell, the debonding operation on the bonding part between the first side film strip 6 and the first side adjacent cell 2 can be performed synchronously with the debonding operation on the bonding part between the first side film strip 6 and the first solder tape group 4. For example, by controlling the first coating mechanism 20 to reciprocate along the width direction of the stacked battery string, the debonding liquid can be applied to the entire first side film strip 6 on the first surface of the first side adjacent cell 2, thereby simplifying the debonding operation and improving the debonding efficiency. In the case where the two debonding operations are performed synchronously, in order to prevent the risk that the first side film strip 6 is separated from the first side adjacent cell 2 when the first side adjacent cell 2 descends relative to the defective cell, optionally, the first side film strip 6 can be pressed tightly on the first side adjacent cell 2 after debonding.

[0105] Optionally, the debonding operation on the part of the first side film strip 6 adhered to the first solder tape group 4 on the first surface of the first side adjacent cell 2 is performed before and after the debonding operation on the first side film strip 4 adhered to the first surface of the first side adjacent cell 2. That is to say, first perform a debonding operation on the bonding part between the first side film strip 6 and the first solder tape group 4, so as to facilitate the first side film strip 6 to descend accordingly when the first side adjacent cell 2 descends relative to the defective cell 1, and then perform a debonding operation on the bonding part between the first side film strip 6 and the first side adjacent cell 2, so as to smoothly remove the first side film strip 6 from the first side adjacent cell 2.

[0106] Such as Figure 8As shown, the first side film strip 6 can be torn off from the first side adjacent cell 2 through the film tearing mechanism 40. Optionally, the film tearing mechanism 40 includes a translation drive module 41 and jaw assemblies 42 connected to both sides of the drive end of the translation drive module 41. The translation drive module 41 first drives the jaw assemblies 42 to both ends of the first side film strip 6. When the jaw assemblies 42 hold both ends of the first side film strip 6, the translation drive module 41 drives the jaw assemblies 42 to move away from the first side adjacent cell 2, thereby tearing off the first side film strip 6 from the first side adjacent cell 2.

[0107] The translation drive module 41 can adopt linear drive modules with various existing structures, such as a lead screw drive module, a synchronous belt drive module, etc.

[0108] Optionally, before performing the step S5 of removing the defective cell 1 with the second side film strip 7, the first solder ribbon group 4, and the second solder ribbon group 5, the method for repairing a stacked cell string in an embodiment of the present application further includes:

[0109] Controlling the first side adjacent cell 2 and the second side adjacent cell 3 to translate a predetermined distance away from the defective cell 1.

[0110] In this way, it can be ensured that there is enough space to remove the defective cell 1 from between the first side adjacent cell 2 and the second side adjacent cell 3.

[0111] Correspondingly, after performing the step S6 of placing the replacement cell 8 with its first surface facing up at the position vacated after the defective cell is removed, the method for repairing a stacked cell string in an embodiment of the present application further includes:

[0112] Controlling the first side adjacent cell 2 and the second side adjacent cell 3 to translate and reset towards the replacement cell 8. Ensure that the first side edge and the second side edge of the replacement cell 8 are respectively superimposed on the first side adjacent cell 2 and the second side adjacent cell 3.

[0113] Optionally, cutting the first solder ribbon group 4 between the defective cell 1 and the first side adjacent cell 2 in step S5 includes: cutting the first solder ribbon group 4 directly above the first side cell 1, and the end of the first solder ribbon group 4 remaining on the first side adjacent cell 2 tilts upward and forms a first insertion gap a as shown in Figure 8 、 Figure 9 The first side film strip 6 is located in the first insertion gap a, or when the first side edge of the replacement cell 8 is superimposed on the first side adjacent cell 2, the first replacement film strip 9 enters the first insertion gap a.

[0114] By cutting the first solder ribbon group 4 directly above the positive side adjacent to the cell 2, the subsequent overlapping solder position between 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 solder 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 adjacent to the cell 2 on the first side slopes upward, thereby forming a first insertion gap a between it and the cell 2 adjacent to the first side. Thus, when controlling the cell 2 adjacent to the first side to rise and reset towards the replacement cell 8 in step S7, the first edge of the replacement cell 8 can be inserted into the first insertion gap a, ensuring that the first replacement film strip 9 on the replacement cell 8 or the first film strip 6 on the cell 2 adjacent to the first side can smoothly enter the overlapping position between the replacement cell 8 and the cell 2 adjacent to the first side.

[0115] Similarly, optionally, cutting the second solder ribbon group 5 between the defective cell 1 and the cell 3 adjacent to the second side in step S5 includes: cutting the second solder ribbon group 5 directly above the defective cell 1. As Figure 8 , Figure 9 shown, correspondingly, the end of the second replacement solder ribbon group 12 on the replacement cell 8 facing the cell 3 adjacent to the second side slopes upward, forming a second insertion gap b between it and the replacement cell 8, and the second replacement film strip 10 is located in the second insertion gap b.

[0116] By cutting the second solder ribbon group 5 directly above the defective cell 1, the subsequent overlapping solder position between 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 solder 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 slope upward towards the cell 3 adjacent to the second side, 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. When controlling the cell 3 adjacent to the second side to descend and reset towards the replacement cell 8 in step S7, the first side edge of the cell 3 adjacent to the second side is inserted into the second insertion gap b, and the second replacement film strip 10 smoothly enters the overlapping position between the replacement cell 8 and the cell 3 adjacent to the second side.

[0117] Optionally, before welding the solder ribbons in the first solder ribbon group 4 and the first replacement solder ribbon group 11 to each other in step S8, the method for repairing the laminated battery string in the embodiments of the present application further includes:

[0118] Clamping the solder ribbons in the first solder ribbon group 4 and the first replacement solder ribbon group 11 to each other.

[0119] In this way, it can be ensured that the welding tapes in the first welding tape group 4 on the first-side adjacent cell 2 and the first replacement welding tape group 11 on the replacement cell 8 can be in one-to-one correspondence and firmly welded together, preventing missed welding and false welding.

[0120] Similarly, optionally, before welding the welding tapes in the second welding tape group 5 and the second replacement welding tape group 12 in a one-to-one correspondence in step S8, the method for repairing a laminated battery string in the embodiment of the present application further includes:

[0121] Clamping the welding tapes in the second welding tape group 5 and the second replacement welding tape group 12 in a one-to-one correspondence.

[0122] In this way, it can be ensured that the welding tapes in the second welding tape group 5 on the first-side adjacent cell 2 and the second replacement welding tape group 12 on the replacement cell 8 can be in one-to-one correspondence and firmly welded together, preventing missed welding and false welding.

[0123] Optionally, the welding method for the first welding tape group 4 and the first replacement welding tape group 11, and the welding method for the second welding tape group 5 and the second replacement welding tape group 12 are any one of laser welding, infrared welding, hot air heating welding, and electromagnetic induction welding.

[0124] Each of the above welding methods can ensure that the welding tapes in the first welding tape group 4 and the first replacement welding tape group 11 can be welded together, and the welding tapes in the second welding tape group 5 and the second replacement welding tape group 12 can be welded together.

[0125] As Figure 7 shown, the first welding tape group 4 and the second welding tape group 5 can be cut by the cutting mechanism 50.

[0126] As Figures 13 to 15 shown, optionally, the cutting mechanism 50 includes a moving mechanism (not shown in the figure), a cutter holder 52, a fixed cutter 53, a movable cutter 54, and a cutter driving part 55, where:

[0127] The cutter driving part 55 is connected to the cutter holder 52, the cutter holder 52 is connected to the movable part of the moving mechanism, and the moving mechanism is used to drive the cutter holder 52 to translate and lift.

[0128] The fixed cutter 53 is fixedly connected to the cutter holder 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 welding 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.

[0129] The movable cutter 54 is slidably connected to the cutter holder 52 and is in contact with the fixed cutter 53. A second cutting edge 541 is formed at the lower side edge of the movable cutter 54.

[0130] The driving end of the cutter driving part 55 is connected to the movable cutter 54. The cutter driving part 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.

[0131] When the movable cutter 54 slides to the avoidance position, a gap for the solder tape to pass through is formed between each support inclined surface 561 and the second cutting edge 541.

[0132] When the movable cutter 54 slides to the cutting position, the second cutting edge 541 and each first cutting edge 562 cooperate to cut the solder tape passing through between them.

[0133] Taking the shearing process of the first solder tape group 4 as an example, the optional working process of the shearing mechanism 50 is as follows:

[0134] In the initial state, the cutter seat 52 and each component on it are far away from the first solder tape group 4. The movable cutter 54 is in the avoidance position, and a gap for the solder tape to pass through is formed between the support inclined surface of each hook-shaped cutter 56 and the second cutting edge 541 of the movable cutter 54.

[0135] When it is necessary to cut the first solder tape group 4, the moving mechanism drives the cutter seat 52 to move, so that each hook-shaped cutter 56 moves to the area above the adjacent two solder tapes in the first solder tape group 4. The first cutting edge 562 of the hook-shaped cutter 56 is directly above the position to be cut of the corresponding solder tape. Then the moving mechanism drives the cutter seat 52 to descend, so that each hook-shaped cutter 56 passes downward through the adjacent two solder tapes.

[0136] Next, the moving mechanism drives the cutter seat 52 to translate perpendicular to the length direction of the solder tape, so that each hook-shaped cutter 56 moves below the corresponding solder tape. The solder tape is supported on the support inclined surface 561 of the hook-shaped cutter 56, and the position to be cut of the solder tape is placed on the first cutting edge 562.

[0137] Finally, the cutter driving part 55 drives the movable cutter 54 to slide downward to the cutting position, and the second cutting edge 541 of the movable cutter 54 and the first cutting edge 562 of each hook-shaped cutter 56 cooperate to cut the solder tape passing through between them.

[0138] The cutter driving part 55 can adopt various existing driving mechanisms that can drive the movable cutter 54 to slide up and down relative to the fixed cutter 53.

[0139] Of course, the shearing mechanism 50 can also adopt other existing shearing mechanisms with different structures, as long as it can cut the first solder tape group 4 and the second solder tape group 5.

[0140] Such as Figure 10As shown, the first solder tape group 4 and the solder tapes in the first replacement solder tape group 11 can be clamped together one by one through the solder tape clamping mechanism 60, and the second solder tape group 5 and the solder tapes in the second replacement solder tape group 12 can be clamped together one by one.

[0141] As Figure 11 shown, optionally, the solder tape 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, where:

[0142] 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.

[0143] 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.

[0144] A number 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 and can float up and down and extend downward from the first moving bracket 62. A number 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 and can 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 tape clamping assembly, and a welding avoidance hole is arranged on the solder tape clamping assembly.

[0145] When the moving module drives the mounting bracket 61 to descend, the first chucks 64 and the second chucks 65 of each solder tape clamping assembly can adaptively float up and down after being stressed at the bottom (i.e., after contacting the battery cell or the solder tape 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 chuck 64 and the corresponding second chuck 65 cooperate to clamp the two solder tapes to be welded, so that the two solder tapes to be welded overlap each other. The two solder tapes to be welded are, for example, one solder tape in the first solder tape group 4 and one solder tape in the first replacement solder tape group 11, or one solder tape in the second solder tape group 5 and one solder tape in the second replacement solder tape group 12.

[0146] As Figure 12 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, where 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.

[0147] The side elevation 645 of the first chuck 64 faces the side elevation 645 of the second chuck 65, and the side elevation 645 of the first chuck 64 and the side elevation 645 of the second chuck 65 approach or move away from each other with the relative movement of the first moving frame 62 and the second moving frame 63.

[0148] The clamping and overlapping process of the first chuck 64 and the second chuck 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 frame 61 to descend, the first bottom surface 643 of the first chuck 64 and the first bottom surface 643 of the second chuck 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 relatively, the side elevation 645 of the first chuck 64 and the side elevation 645 of the second chuck 65 clamp the pressed first solder tape and second solder tape, so that the first solder tape and the second solder tape are overlapped horizontally or vertically.

[0149] Continue to refer to Figure 12 As shown, a first avoidance hole 641 is provided at the clamping end of the first chuck 64, a second avoidance hole 651 is provided at the clamping end of the second chuck 65, and the first avoidance hole 641 and the second avoidance hole 651 jointly enclose a welding avoidance hole. When the side elevation 645 of the first chuck 64 and the side elevation 645 of the second chuck 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.

[0150] Of course, the solder tape clamping mechanism 60 can also adopt other existing solder tape clamping mechanisms with other 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.

[0151] 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 only 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, 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: Used to replace defective battery cells in a laminated battery string, wherein the laminated battery string is formed by welding a plurality of battery cells through a plurality of welding ribbon groups; The laminated battery 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; Release the bonding between the first side film strip located on the first surface of the first side adjacent battery cell and the first welding tape group welded on the first surface of the first side adjacent battery cell, and release the bonding between the first side film strip located on the second surface of the defective battery cell and the second surface of the defective battery cell, wherein the first side film strip is a film strip located between the defective battery cell and the first side adjacent battery cell, and the first welding tape group is also welded on the second surface of the defective battery cell; Release the bonding between the second side film strip located on the first surface of the defective battery cell and the second welding tape group welded on the first surface of the defective battery cell, and release the bonding between the second side film strip located on the second surface of the second side adjacent battery cell and the second surface of the second side adjacent battery cell, wherein the second side film strip is a film strip located between the defective battery cell and the second side adjacent battery cell, and the second welding tape group is also welded on the second surface of the second side adjacent battery cell; Control the first side adjacent battery cell to descend relative to the defective battery cell, so that the first side film strip is separated from the defective battery cell; control the second side adjacent battery cell to ascend relative to the defective battery cell, so that the second side film strip is separated from the second side adjacent 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 second side film strip, the first welding ribbon group and the second welding ribbon group; Place the replacement battery cell with the first surface facing upwards to the position vacated after the defective battery cell is removed, wherein a second replacement film strip is adhered to the second side edge of the replacement battery cell, a first replacement welding tape group is welded to the second surface of the replacement battery cell, and a second replacement welding tape group is welded to the first surface of the replacement battery cell; or, tear off the first side film strip from the battery cell adjacent to the first side, and place the replacement battery cell with the first surface facing upwards to the position vacated after the defective battery cell is removed, wherein a first replacement film strip is adhered to the first side edge of the replacement battery cell, a second replacement film strip is adhered to the second side edge of the replacement battery cell, the first replacement welding tape group is welded to the second surface of the replacement battery cell, and the second replacement welding tape group is welded to the first surface of the replacement battery cell; Control the first side adjacent battery sheet to rise and reset, so that the first side edge of the replacement battery sheet overlaps with the first side adjacent battery sheet, and the first side film strip or 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 fall and reset, 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: The releasing of the bonding between the first side film strip located on the first surface of the first side adjacent battery cell and the first welding tape group welded on the first surface of the first side adjacent battery cell comprises: performing a debonding operation on the first side film strip portion bonded to the first welding tape group on the first surface of the first side adjacent battery cell; The releasing of the bonding between the first side film strip located on the second surface of the defective battery cell and the second surface of the defective battery cell comprises: performing a debonding operation on the first side film strip located on the second surface of the defective battery cell; The method of releasing the bonding between the second side film strip located on the first surface of the defective battery cell and the second welding tape group welded on the first surface of the defective battery cell comprises: performing a debonding operation on the bonding portion between the second side film strip located on the first surface of the defective battery cell and the second welding tape group; The releasing of the bonding between the second side film strip on the second surface of the second side adjacent battery cell and the second surface of the second side adjacent battery cell comprises: performing a debonding operation on the second side film strip on the second surface of the second side adjacent battery cell.

3. The laminated battery string repair method according to claim 2, characterized in that: The debonding operation includes at least one of applying a debonding liquid, applying a hot compress, blowing hot air or blowing cold air.

4. The laminated battery string repair method according to claim 3, characterized in that: The debonding liquid is at least one of hydrogen peroxide, glycerin, alcohol, acetone and a debonding agent.

5. The laminated battery string repair method according to claim 2, characterized in that: Before tearing off the first side film strip from the first side adjacent battery cell, the stacked battery string repair method further includes: performing a debonding operation on the first side film strip bonded to the first surface of the first side adjacent battery cell.

6. The laminated battery string repair method according to claim 5, characterized in that: The debonding operation on the first side film strip portion bonded to the first welding tape group on the first surface of the first side adjacent battery cell is performed simultaneously with the debonding operation on the first side film strip bonded to the first surface of the first side adjacent battery cell.

7. The laminated battery string repair method according to claim 1, characterized in that: Before removing the defective battery cell, the stacked battery string repair method further includes: controlling the first side adjacent battery cell and the second side adjacent battery cell to translate away from the defective battery cell by a predetermined distance; After placing the replacement cell with the first surface facing upward at the position vacated after the defective cell is removed, the stacked cell string repair method further includes: controlling the first side adjacent cell and the second side adjacent cell to translate and reset toward the replacement cell.

8. The laminated battery string repair method according to claim 1, 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 right above the first side 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 first side adjacent battery cell, the first side film strip is located in the first insertion gap, or 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 welding ribbon group between the defective battery cell and the battery cell adjacent to the second side includes: cutting the second welding ribbon group from directly above the defective battery cell; the second replacement welding 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.

9. 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.

10. 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.

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