Defective cell removal mechanism and repair device

Abstract

The present application provides a defective battery cell removal mechanism, including a rework station, a heating mechanism, a stripping mechanism and a transport mechanism. The rework station includes a middle support platform for supporting defective battery cells in a battery string, and a first side support platform and a second side support platform for supporting battery cells on both sides of the defective battery cell. The heating mechanism heats the defective battery cell, so that the first side solder strip and the second side solder strip on the defective battery cell are desoldered, and the first side film strip and the second side film strip are softened. The film stripping mechanism is used to peel off the first side film strip softened by heat from the first side adjacent battery cell, and to peel off the second side film strip softened by heat from the second side adjacent battery cell. The first side support platform and the second side support platform are both moved away from the middle support platform, so that the first side film strip and the second side film strip are separated from the first side adjacent battery cell and the second side adjacent battery cell, respectively. The present application automatically removes defective battery cells and the film strips bonded thereto from the battery string, thereby improving the removal efficiency.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell assembly production, and specifically to a defective cell removal mechanism and a repair device. Background Art

[0002] IBC cells, or interdigitated back contact cells, are a technology that places both the positive and negative metal contacts of solar cells on the back of the cell. IBC cells can reduce the shielding of the electrodes on the light-receiving surface of the cell and improve the energy conversion efficiency of the cell.

[0003] In an IBC battery string, two adjacent IBC battery cells are connected by a welding ribbon group. From the front of the IBC battery string, the welding ribbon group exposed at both ends of the battery string and at the interval between two adjacent IBC battery cells can be seen, which affects the integrity and aesthetics of the component. For this reason, a film strip can be bonded on the back side of the end battery cell of the IBC battery string and between the back sides of two adjacent battery cells to cover the welding ribbon group, so as to improve the integrity and aesthetics of the component.

[0004] For the above-mentioned IBC battery string with film strips bonded thereto, when there are defective battery cells (referred to as defective battery cells) in the battery string, the battery string can be replaced and repaired according to actual conditions, that is, the defective battery cells are removed from the battery string and replaced with qualified battery cells (referred to as replacement battery cells).

[0005] The commonly used battery string repair machines at present are mainly used for replacing and repairing battery strings without membrane strips. They are unable to remove defective battery cells of IBC battery strings with membrane strips, and thus are unable to repair IBC battery strings with membrane strips. Utility Model Content

[0006] In view of the problem that the traditional battery string repair machine cannot remove the defective battery cells of the IBC battery string with film strips, the present application provides a defective battery cell removal mechanism, and its detailed technical solution is as follows:

[0007] A defective cell rejection mechanism is used to reject defective cells in a cell string. The cell string is formed by welding IBC cells with welding strips. Film strips are bonded between adjacent cells in the cell string and at the edges of cells at the ends of the cell string. The film strips are located between the corresponding cells and the welding strips. The defective cell rejection mechanism includes a rework station, a heating mechanism, a film stripping mechanism and a transport mechanism, wherein:

[0008] The rework station includes a first side loading station, a middle loading station, and a second side loading station, wherein the middle loading station is used to load defective battery cells in the battery string, the first side loading station is located on the first side of the middle loading station, and the first side loading station is used to load all battery cells located on the first side of the defective battery cells in the battery string, the second side loading station is located on the second side of the middle loading station, and the second side loading station is used to load all battery cells located on the second side of the defective battery cells in the battery string; the back side of the battery string faces downward;

[0009] The heating mechanism is arranged above the middle supporting platform, and the heating mechanism is used to heat the defective battery cell, so that the first side welding strip and the second side welding strip on the back side of the defective battery cell are de-soldered from the defective battery cell, and the first side film strip and the second side film strip are softened, wherein the first side welding strip is welded on the back side of the defective battery cell and the first side adjacent battery cell, and the second side welding strip is welded on the back side of the defective battery cell and the second side adjacent battery cell; the first side film strip is a film strip bonded to the first side edge of the defective battery cell, and the second side film strip is a film strip bonded to the second side edge of the defective battery cell;

[0010] The film stripping mechanism is used to penetrate downward into the gap between the defective battery cell and the first side adjacent battery cell to strip the first side film strip softened by heat from the first side adjacent battery cell;

[0011] The film stripping mechanism is also used to penetrate downward into the gap between the defective battery cell and the second side adjacent battery cell to strip the heat-softened second side film strip from the second side adjacent battery cell;

[0012] The first side loading platform and the second side loading platform can both move away from the middle loading platform, so that the first side film strip softened by heat is separated from the first side adjacent battery sheet in the horizontal direction, and the second side film strip softened by heat is separated from the second side adjacent battery sheet in the horizontal direction;

[0013] The transport mechanism is used to remove the defective battery sheet with the first side film strip and the second side film strip from the middle carrying platform.

[0014] Place the IBC battery string to be repaired with its back side facing downward on the repair table, wherein the defective battery cell is located on the middle carrier, all battery cells on the first side of the defective battery cell are located on the first side carrier, and all battery cells on the second side of the defective battery cell are located on the second side carrier. Heat the defective battery cell by a heating mechanism so that the first side welding strip and the second side welding strip on the back of the defective battery cell are desoldered from the defective battery cell, and the first side film strip and the second side film strip at the edges of both sides of the defective battery cell are softened. Then, control the film stripping mechanism to penetrate downward into the gap between the defective battery cell and the adjacent battery cell on the first side to peel off the first side film strip softened by heat from the adjacent battery cell on the first side, and control the film stripping mechanism to penetrate downward into the gap between the defective battery cell and the adjacent battery cell on the second side to peel off the second side film strip softened by heat from the adjacent battery cell on the second side. Next, the first side loading platform and the second side loading platform are controlled to move away from the middle loading platform, so that the first side film strip softened by heat is separated from the first side adjacent battery cell, the second side film strip softened by heat is separated from the second side adjacent battery cell, and the first side welding strip and the second side welding strip on the back of the defective battery cell are separated from the defective battery cell. Finally, the defective battery cell with the first side film strip and the second side film strip is removed from the middle loading platform by the transport mechanism.

[0015] The defective cell removal mechanism provided in the present application can automatically remove the defective cell and the film strips adhered to the edges on both sides thereof from the IBC battery string at the same time, thereby improving the defective cell removal efficiency.

[0016] In some embodiments, the heating mechanism is configured to be able to rise and fall, and the stripping mechanism includes a first translation drive module, a first stripping sheet and a second stripping sheet, wherein: the first translation drive module is arranged on the heating mechanism, and the first stripping sheet and the second stripping sheet are both slidably connected to the heating mechanism and are transmission connected to the first translation drive module; when the heating mechanism descends, it drives the first stripping sheet downward to penetrate into the gap between the defective battery cell and the adjacent battery cell on the first side, and the second stripping sheet downward to penetrate into the gap between the defective battery cell and the adjacent battery cell on the second side; the first translation drive module is used to drive the first stripping sheet and the second stripping sheet to move in opposite directions.

[0017] The film stripping mechanism is integrated and installed on the heating mechanism. After the heating mechanism completes heating of the defective battery cell, it continues to drive the film stripping mechanism to descend. At the same time, the first translation drive module drives the first film stripping sheet and the second film stripping sheet to separate to both sides, so that the first film stripping sheet and the second film stripping sheet move obliquely downward respectively. During this process, the first film stripping sheet penetrates into the gap between the defective battery cell and the first side adjacent battery cell, and is inserted between the first adjacent battery cell and the first side film strip, until the first side film strip is peeled off from the first adjacent battery cell; the second film stripping sheet penetrates into the gap between the defective battery cell and the second side adjacent battery cell, and is inserted between the second adjacent battery cell and the second side film strip, until the second side film strip is peeled off from the second adjacent battery cell.

[0018] In some embodiments, the first translation drive module includes a synchronous belt installed on the heating mechanism in a horizontal direction, and a synchronous belt driving member arranged on the heating mechanism to drive the synchronous belt to rotate; the first film stripping sheet is connected to the first side belt body of the synchronous belt, and the second film stripping sheet is connected to the second side belt body of the synchronous belt. When the synchronous belt driving member drives the synchronous belt to rotate, it drives the first film stripping sheet and the second film stripping sheet to slide in opposite directions.

[0019] A first translation drive module with a simple structure and stable driving is provided, which drives a first film stripping sheet and a second film stripping sheet to slide in opposite directions through a synchronous belt, so that the first film stripping sheet and the second film stripping sheet are separated to both sides or moved closer to the middle.

[0020] In some embodiments, a first stripping sheet is provided with a plurality of first stripping teeth for stripping the first side film strip at the lower end, and a first solder strip avoidance groove for avoiding the first side solder strip is formed between adjacent first stripping teeth; a second stripping sheet is provided with a plurality of second stripping teeth for stripping the second side film strip at the lower end, and a second solder strip avoidance groove for avoiding the second side solder strip is formed between adjacent second stripping teeth.

[0021] By providing a first stripping tooth at the lower end of the first stripping sheet, the first stripping sheet avoids the first side soldering strip when stripping the first side film strip from the first side adjacent battery cell, thereby preventing the first side soldering strip from being separated from the first side adjacent battery cell. Similarly, by providing a second stripping tooth at the lower end of the second stripping sheet, the second stripping sheet avoids the second side soldering strip when stripping the second side film strip from the second side adjacent battery cell, thereby preventing the second side soldering strip from being separated from the second side adjacent battery cell.

[0022] In some embodiments, the first stripping teeth are arranged obliquely and the thickness thereof gradually decreases from top to bottom, and the second stripping teeth are arranged obliquely and the thickness thereof gradually decreases from top to bottom.

[0023] With such arrangement, when the first stripping tooth moves obliquely downward, it can be inserted more smoothly between the first side film strip and the first side adjacent battery slice, so as to strip the first side film strip from the first side adjacent battery slice. Similarly, the second stripping tooth is arranged obliquely and the thickness gradually decreases from top to bottom. With such arrangement, when the second stripping tooth moves obliquely downward, it can be inserted more smoothly between the second side film strip and the second side adjacent battery slice, so as to strip the second side film strip from the second side adjacent battery slice.

[0024] In some embodiments, the film stripping mechanism includes a first film stripping portion and a second film stripping portion, wherein: the first film stripping portion is arranged on the first side of the heating mechanism, the first film stripping portion includes a first driving module and a first film stripping sheet, the first film stripping sheet is connected to the driving end of the first driving module, the first driving module is used to drive the first film stripping sheet to descend, so that the first film stripping sheet downwardly penetrates into the gap between the defective battery cell and the adjacent battery cell on the first side, and the first driving module is also used to drive the first film stripping sheet to translate toward the adjacent battery cell on the first side, so that the first film stripping sheet strips the first side film strip. The second film stripping section is provided on the second side of the heating mechanism, and the second film stripping section comprises a second driving module and a second film stripping sheet, and the second film stripping sheet is connected to the driving end of the second driving module, and the second driving module is used to drive the second film stripping sheet to descend so that the second film stripping sheet penetrates downward into the gap between the defective cell and the cell adjacent to the second side, and the second driving module is also used to drive the second film stripping sheet to translate toward the cell adjacent to the second side so that the second film stripping sheet peels the second side film strip from the bottom of the cell adjacent to the second side.

[0025] After the heating mechanism completes heating of the defective cell, the first driving module drives the first stripping sheet to descend and drives the first stripping sheet to translate toward the first side adjacent cell, so that the first stripping sheet moves obliquely downward. During this process, the first stripping sheet penetrates into the gap between the defective cell and the first side adjacent cell, and is inserted between the first adjacent cell and the first side film strip, until the first side film strip is peeled off from the first adjacent cell. Similarly, the second driving module drives the second stripping sheet to descend and drives the second stripping sheet to translate toward the second side adjacent cell, so that the second stripping sheet moves obliquely downward. During this process, the second stripping sheet penetrates into the gap between the defective cell and the second side adjacent cell, and is inserted between the second adjacent cell and the second side film strip, until the second side film strip is peeled off from the second adjacent cell. Since the first stripping sheet and the second stripping sheet are driven by their own independent driving modules, the independence and flexibility of the first stripping sheet and the second stripping sheet are improved.

[0026] In some embodiments, a middle pressing assembly is disposed at the bottom of the heating mechanism, and the middle pressing assembly is used to press downward against the middle of the defective battery cell.

[0027] Before the film stripping mechanism strips off the first side film strip and the second side film strip, the middle pressing assembly descends under the drive of the heating mechanism and finally presses against the middle of the defective battery cell, thereby pressing the defective battery cell downward and flattening it. In this way, it can be ensured that the defective battery cell can be tightly attached to and fixed by the middle supporting platform, and finally ensure that when the first side supporting platform and the second side supporting platform move away from the middle supporting platform, the defective battery cell does not move with the first adjacent battery cell and the second adjacent battery cell.

[0028] In some embodiments, the intermediate pressing assembly includes a plurality of rows of pressing pins arranged at intervals along the length direction of the rework table, and each row of pressing pins includes a plurality of pressing pins arranged at intervals along the width direction of the rework table.

[0029] At least two rows of pressing needles arranged at intervals along the length direction of the rework station press the defective battery cell from different positions, thereby ensuring that the defective battery cell can be pressed flat on the middle carrier and preventing the defective battery cell from being damaged due to uneven pressure.

[0030] In some embodiments, the defective cell removal mechanism also includes a first side pressing component and a second side pressing component, wherein: the first side pressing component is used to press downward against the first side adjacent cell, and the second side pressing component is used to press downward against the second side adjacent cell.

[0031] Before the first side supporting platform and the second side supporting platform move away from the middle supporting platform, the first side pressing assembly and the second side pressing assembly press the first side adjacent battery cell and the second side adjacent battery cell against the first side supporting platform and the second side supporting platform respectively, thereby ensuring that the first side adjacent battery cell and the second side adjacent battery cell move with the first side supporting platform and the second side supporting platform respectively and are separated from the defective battery cells.

[0032] In some embodiments, the second side pressing assembly has the same structure as the first side pressing assembly; the first side pressing assembly includes an adsorption member and a pressing tool, wherein the adsorption member is connected to a heating mechanism, the heating mechanism is used to drive the adsorption member to translate and lift, and the pressing tool is adsorbed on the adsorption member; or, the first side pressing assembly includes a moving part, an adsorption member and a pressing tool, wherein the moving part is arranged on one side of the rework station, the adsorption member is connected to a driving end of the moving part, the moving part is used to drive the adsorption member to translate and lift, and the pressing tool is adsorbed on the adsorption member.

[0033] Before the first side support platform and the second side support platform move away from the middle support platform, the adsorbent releases the pressing tooling adsorbed thereon, so that the pressing tooling falls onto the first side adjacent battery cell and the second side adjacent battery cell, so as to press the first side adjacent battery cell and the second side adjacent battery cell onto the first side support platform and the second side support platform respectively. Among them, the adsorbent is integrated into the heating mechanism, so that the adsorbent and the pressing tooling can move with the heating mechanism, thereby reducing the equipment cost. The adsorbent is set on an independent moving part, and the independence and flexibility of the movement of the adsorbent are improved.

[0034] In some embodiments, a third weld ribbon avoidance groove for avoiding the first side weld ribbon and the second side weld ribbon is provided on the middle supporting platform, and the third weld ribbon avoidance groove extends along the length direction of the rework platform, and each third weld ribbon avoidance groove is used to accommodate a first side weld ribbon or a second side weld ribbon; a clamping assembly for clamping the corresponding first side weld ribbon or second side weld ribbon is provided in each third weld ribbon avoidance groove.

[0035] By arranging the third solder strip avoidance groove on the middle supporting platform, the first side solder strip and the second side solder strip on the defective battery cell are guided and avoided. On the one hand, it can prevent the first side solder strip and the second side solder strip on the defective battery cell from being pressed on the middle supporting platform by the defective battery cell, ensuring that when the first side supporting platform and the second side supporting platform move away from the middle supporting platform, the first side solder strip and the second side solder strip after desoldering with the defective battery cell can move smoothly relative to the defective battery cell. On the other hand, the first side solder strip and the second side solder strip can be guided and limited during their movement.

[0036] By arranging a clamping assembly in the second solder strip avoidance groove, the first side solder strip and the second side solder strip are limited and guided, so that the first side solder strip and the second side solder strip always remain in the second solder strip avoidance groove during the movement relative to the defective battery cell.

[0037] In some embodiments, a mounting groove extending along the width direction of the rework station is further provided on the intermediate carrier, and the mounting groove passes through all the third welding strip avoidance grooves; the defective battery cell rejection mechanism also includes a first clamp, a second clamp and a clamping drive unit, wherein the first clamp and the second clamp are stacked up and down in the mounting groove, a first clamp is provided at a position corresponding to each third welding strip avoidance groove on the first clamp, and a second clamp paired with the first clamp is provided at a position corresponding to each third welding strip avoidance groove on the second clamp, and each second clamp and the corresponding first clamp constitute a clamping assembly; the clamping drive unit is arranged below the intermediate carrier, and the clamping drive unit is transmission-connected with the first clamp and the second clamp, and the clamping drive unit is used to drive the first clamp and the second clamp to move in opposite directions in the mounting groove to drive each clamping assembly to clamp or open synchronously, and when the clamping assembly is clamped, it clamps the corresponding first side welding strip or second side welding strip to guide the first side welding strip or the second side welding strip, and positions the first side welding strip or the second side welding strip on the intermediate carrier.

[0038] By arranging a first clamping plate, a second clamping plate and a clamping drive part, and arranging a first clamping jaw and a second clamping jaw on the first clamping plate and the second clamping plate respectively, it is achieved that when the clamping drive part drives the first clamping plate and the second clamping plate to move in opposite directions in the installation groove, each clamping component is synchronously closed or opened to guide and release the first side welding strip or the second side welding strip.

[0039] In some embodiments, the clamping drive portion includes a first lifting drive member, a first connecting rod, a second lifting drive member and a second connecting rod, wherein: the first connecting rod is an L-shaped structure, one end of the first connecting rod is connected to the driving end of the first lifting drive member, and the other end of the first connecting rod is connected to the first end of the first clamping plate, and the first end of the first clamping plate is close to the first end of the mounting groove; the second connecting rod is an L-shaped structure, one end of the second connecting rod is connected to the driving end of the second lifting drive member, and the other end of the second connecting rod is connected to the second end of the second clamping plate, and the second end of the second clamping plate is close to the second end of the mounting groove; when the first lifting drive member drives the first clamping plate to move in the mounting groove via the first connecting rod, the second lifting drive member drives the first clamping plate to move in the opposite direction of the first clamping plate in the mounting groove via the second connecting rod.

[0040] A clamping drive part with a simple structure is provided, which realizes reverse driving of the second clamping plate and the first clamping plate, and finally makes each clamping assembly close or open synchronously.

[0041] In some embodiments, a first guide hole is provided on the first clamping plate, and a second guide hole matching the first guide hole is provided on the second clamping plate. Both the first guide hole and the second guide hole extend along the width direction of the rework table, and the first clamping plate and the second clamping plate are slidably connected via connecting pins passing through the first guide hole and the second guide hole.

[0042] The second clamping plate and the first clamping plate can be guided for sliding, thereby preventing the second clamping plate and the first clamping plate from getting stuck during the reverse sliding process.

[0043] In some embodiments, a first suction cup is provided on the middle supporting platform and is located between adjacent third welding strip avoidance grooves, and the first suction cup is used to absorb defective battery cells; a second suction cup is provided on the end of the first side supporting platform close to the middle supporting platform, and the second suction cup is used to absorb the adjacent battery cells on the first side; a third suction cup is provided on the end of the second side supporting platform close to the middle supporting platform, and the third suction cup is used to absorb the adjacent battery cells on the second side.

[0044] By setting a first suction cup on the middle loading platform, the defective battery cell can be adsorbed and fixed on the middle loading platform. By setting a second suction cup on the first side loading platform, the first side adjacent battery cell can be adsorbed and fixed on the first side loading platform. By setting a third suction cup on the second side loading platform, the second side adjacent battery cell can be adsorbed and fixed on the second side loading platform. In this way, when the first side loading platform and the second side loading platform move away from the middle loading platform, it can be ensured that the first side adjacent battery cell and the second side adjacent battery cell are separated from the defective battery cell.

[0045] In some embodiments, a heating component is disposed in the middle supporting platform, and the heating component is used to cooperate with the heating mechanism to heat the defective battery cell.

[0046] The heating component cooperates with the heating mechanism to heat the defective battery cell, thereby shortening the softening time of the first side film tape and the second side film tape, and shortening the desoldering time of the first side solder tape, the second side solder tape and the defective battery cell.

[0047] The present application also provides a rework device, which includes the defective battery cell removal mechanism described in any of the above items; after the defective battery cell is removed from the intermediate carrier platform, the transport mechanism is also used to transport the replacement battery cell with the back side facing downward to the intermediate carrier platform, and the first side replacement film strip and the second side replacement film strip are respectively adhered to the two side edges of the back side of the replacement battery cell; the first side carrier platform is also used to rise relative to the intermediate carrier platform, so that a first insertion gap is generated between the first side adjacent battery cell and the first side welding strip; the second side carrier platform is also configured to rise relative to the intermediate carrier platform, so that a second insertion gap is generated between the second side adjacent battery cell and the second side welding strip; the first side carrier platform is also used to move back to its position toward the intermediate carrier platform, so that the first side replacement film strip is inserted into The first side support platform is used to move toward the middle support platform to return to its position so that the second side replacement film strip is inserted into the second insertion gap; the first side support platform is also used to descend and return to its position relative to the middle support platform so that the first side replacement film strip inserted into the first insertion gap contacts the first side adjacent battery cell; the second side support platform is also used to descend and return to its position relative to the middle support platform so that the second side replacement film strip inserted into the second insertion gap contacts the second side adjacent battery cell; the heating mechanism is also used to heat the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is bonded to the back side of the first side adjacent battery cell, and the second side replacement film strip is bonded to the back side of the second side adjacent battery cell.

[0048] The repair device provided in the present application includes a defective cell removal mechanism that can simultaneously remove the defective cell and the film strip bonded thereto from the IBC battery string, and connect the replacement cell with the first side replacement film strip and the second side replacement film strip bonded thereto to the position vacated after the defective cell is removed, thereby realizing automatic repair of the IBC battery string with the film strips.

[0049] In some embodiments, each third solder strip avoidance groove is provided with a lifting hole passing through the middle supporting platform; the defective battery cell rejection mechanism also includes a solder strip lifting assembly, the solder strip lifting assembly includes a second lifting drive unit, a pin mounting plate and a plurality of pins, wherein: the pin mounting plate is connected to the driving end of the second lifting drive unit, a plurality of pins are mounted on the pin mounting plate and correspond one to one to the lifting holes, and each pin is inserted into the corresponding lifting hole; the second lifting drive unit is used to drive the pin mounting plate to rise, so that the upper end of each pin is inserted upward into the corresponding third solder strip avoidance groove, so as to press the first side solder strip or the second side solder strip located in the third solder strip avoidance groove against the back of the replacement battery cell.

[0050] By lifting the solder strip lifting assembly, the first side solder strip and the second side solder strip can be pressed against the back of the replacement battery cell before welding, ultimately ensuring that the first side solder strip and the second side solder strip can be firmly welded to the back of the replacement battery cell.

[0051] In some embodiments, the rework device further includes a replacement cell supply mechanism for bonding the first side replacement film strip and the second side replacement film strip to both side edges of the back side of the replacement cell to obtain a replacement cell.

[0052] By providing a replacement cell supply mechanism, automatic preparation of a replacement cell with a first-side replacement film strip and a second-side replacement film strip is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a structural schematic diagram of a defective battery cell rejection mechanism in an embodiment of the present application;

[0054] Figure 2 It is a partial structural schematic diagram of a defective battery cell rejection mechanism in an embodiment of the present application;

[0055] Figure 3 for Figure 2 A partial enlarged view of the A area;

[0056] Figure 4 It is a structural schematic diagram of the film stripping mechanism in the embodiment of the present application;

[0057] Figure 5 It is a schematic structural diagram of the intermediate supporting platform in an embodiment of the present application at a viewing angle;

[0058] Figure 6 It is a schematic structural diagram of the intermediate supporting platform in the embodiment of the present application from another viewing angle;

[0059] Figure 7 is a schematic structural diagram of the intermediate supporting platform in the embodiment of the present application at another viewing angle;

[0060] Figure 8 for Figure 7 AA section view;

[0061] Fig. 9 for Figure 7 BB cross-sectional view;

[0062] Figures 1 to 9 Included:

[0063] The first side loading platform 1;

[0064] Middle loading platform 2:

[0065] The third welding strip avoidance groove 21;

[0066] Guide assembly 22;

[0067] Mounting slot 23;

[0068] First clamping plate 24: first clamping jaw 221;

[0069] Second clamping plate 25: second clamping jaw 222;

[0070] The clamping driving part 26 includes a first lifting driving member 261, a first connecting rod 262, a second lifting driving member 263, and a second connecting rod 264;

[0071] Connecting pin 27;

[0072] A first suction cup 28;

[0073] The welding strip lifting assembly 29 includes a second lifting driving unit 291, a lifting pin mounting plate 292, and a lifting pin 293;

[0074] The second side loading platform 3;

[0075] Stripping mechanism 4:

[0076] The first translation driving module 41 includes a synchronous belt driving member 411 and a synchronous belt 412;

[0077] A first film stripping sheet 42;

[0078] A second film stripping sheet 43;

[0079] Install block 5;

[0080] Heating mechanism 6;

[0081] First side pressing component 8:

[0082] Adsorption member 81, pressing tool 82;

[0083] A second side pressing component 9;

[0084] Defective battery cell 101 , first side adjacent battery cell 102 , first side film strip 103 , second side adjacent battery cell 104 , second side film strip 105 , first side welding strip 106 , second side welding strip 107 . DETAILED DESCRIPTION

[0085] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0086] The commonly used battery string repair machine is mainly used for replacing and repairing battery strings without membrane strips. It is impossible to remove defective battery cells of IBC battery strings with membrane strips, and thus it is impossible to repair IBC battery strings with membrane strips. The IBC battery string with membrane strips is formed by welding IBC battery cells with welding strips. Membrane strips are bonded between adjacent battery cells in the IBC battery string and at the edges of the battery cells at the ends. The membrane strips are located between the corresponding battery cells and the welding strips.

[0087] The present application provides a defective cell removal mechanism, which can automatically remove defective cells and film strips adhered to the edges on both sides thereof from an IBC cell string (referred to as the cell string), thereby improving the defective cell removal efficiency.

[0088] like Figures 1 to 3 As shown, the defective cell removal mechanism in the embodiment of the present application includes a rework station, a heating mechanism 6, a film stripping mechanism 4 and a transport mechanism, wherein:

[0089] The rework station includes a first side loading platform 1, an intermediate loading platform 2, and a second side loading platform 3, wherein the intermediate loading platform 2 is used to load defective cells in the battery string, the first side loading platform 1 is located on the first side (e.g., the left side) of the intermediate loading platform 2, and the first side loading platform 1 is used to load all cells in the battery string located on the first side of the defective cells, the second side loading platform 3 is located on the second side (e.g., the right side) of the intermediate loading platform 1, and the second side loading platform 3 is used to load all cells in the battery string located on the second side of the defective cells. The back of the battery string faces downward.

[0090] The heating mechanism 6 is arranged above the middle supporting platform 2, and the heating mechanism 6 is used to heat the defective battery cell 101 so that the first side welding strip and the second side welding strip on the back side of the defective battery cell 101 are de-soldered from the defective battery cell 101, and the first side film strip 103 and the second side film strip 105 are softened, wherein the first side welding strip is welded to the back side of the defective battery cell 101 and the first side adjacent battery cell 102, and the second side welding strip is welded to the back side of the defective battery cell 101 and the second side adjacent battery cell 104; the first side film strip 103 is a film strip bonded to the first side edge of the defective battery cell 101, and the second side film strip 105 is a film strip bonded to the second side edge of the defective battery cell 101.

[0091] The first side adjacent battery cell 102 is a battery cell located on the first side of the defective battery cell 101 and adjacent to the defective battery cell 101, and the second side adjacent battery cell 104 is a battery cell located on the second side of the defective battery cell 101 and adjacent to the defective battery cell 101. "Desoldering" means heating the defective battery cell 101 so that the solder of the first side solder strip and the second side solder strip is melted by the heat, thereby making the welding between the first side solder strip, the second side solder strip and the defective battery cell 101 invalid.

[0092] The film stripping mechanism 4 is used to penetrate downward into the gap between the defective battery cell 101 and the first side adjacent battery cell 102 to strip the heat-softened first side film strip 103 from the first side adjacent battery cell 102 .

[0093] The film stripping mechanism 4 is further used to penetrate downward into the gap between the defective battery cell 101 and the second side adjacent battery cell 104 to strip the heat-softened second side film strip 105 from the second side adjacent battery cell 104 .

[0094] The first side platform 1 and the second side platform 3 can both move away from the middle platform 2, so that the first side film strip 103 softened by heat is separated from the first side adjacent battery cell 102 in the horizontal direction, and the second side film strip 105 softened by heat is separated from the second side adjacent battery cell 104 in the horizontal direction. The "separation" mentioned here is to separate the film strip from the adjacent battery cell in the horizontal direction, so that the film strip will not interfere with the adjacent battery cell when the defective battery cell is removed later; at the same time, during the separation process, the first side welding strip and the second side welding strip are also detached from the welding point on the defective battery cell. When separating, it is only necessary to pull a little distance apart, and more parts of the first side welding strip and the second side welding strip are still left on the middle platform, and it is not necessary to completely pull the first side welding strip and the second side welding strip out from under the defective battery cell. That is, at this time, the defective battery cell 101 and the first side film strip 103 and the second side film strip 105 thereon are disassembled from the battery string.

[0095] The transport mechanism is used to remove the defective battery cell 101 with the first side film strip 103 and the second side film strip 105 from the middle supporting platform 2 .

[0096] In order to enable those skilled in the art to more clearly understand the working process of the defective battery cell rejection mechanism in the embodiment of the present application, the following will continue to combine Figures 1 to 3 , the working process of the defective battery cell removal mechanism in the embodiment of the present application is described in detail.

[0097] In the initial state, the first side loading platform 1 and the second side loading platform 3 of the rework station are close to the middle loading platform 2, and the loading surfaces of the first side loading platform 1, the middle loading platform 2 and the second side loading platform 3 are at the same height. The film stripping mechanism 4 is located at a high position away from the rework station.

[0098] The battery string to be repaired is placed on the repair platform with its back facing, wherein the defective battery cell 101 in the battery string is located on the middle carrier 2 and is fixed by the middle carrier 2. All battery cells on the first side of the defective battery cell 101 in the battery string are located on the first side carrier 1, and all battery cells on the second side of the defective battery cell 101 in the battery string are located on the second side carrier 3.

[0099] Next, the heating mechanism 6 is controlled to heat the defective cell 101 , so that the first side solder strip and the second side solder strip on the back of the defective cell 101 are desoldered from the defective cell 101 , and the first side film strip 103 and the second side film strip 105 are softened.

[0100] Next, the film stripping mechanism 4 is controlled to penetrate downward into the gap between the defective battery cell 101 and the first side adjacent battery cell 102 to peel off the heat-softened first side film strip 103 from the first side adjacent battery cell 102, and the film stripping mechanism 4 is controlled to penetrate downward into the gap between the defective battery cell 101 and the second side adjacent battery cell 104 to peel off the heat-softened second side film strip 103 from the second side adjacent battery cell 104.

[0101] Next, the first side support platform 1 and the second side support platform 3 are controlled to move away from the middle support platform 2, so that the first side film strip 103 softened by heat is separated from the first side adjacent battery cell 102, the second side film strip 105 softened by heat is separated from the second side adjacent battery cell 104, and the first side solder strip and the second side solder strip on the back side of the defective battery cell 101 are both separated from the defective battery cell 101.

[0102] Finally, the defective battery cell 101 with the first side film strip 103 and the second side film strip 105 is removed from the intermediate carrying platform 2 by the transport mechanism.

[0103] It can be seen that through the cooperation of the rework station, the heating mechanism 6, the film stripping mechanism 4 and the conveying mechanism, the defective battery cell removal mechanism in the embodiment of the present application can automatically remove the defective battery cells and the film strips adhered to the edges on both sides thereof from the IBC battery string at the same time, thereby improving the removal efficiency of defective battery cells.

[0104] Optionally, the heating mechanism 6 is configured to be liftable, for example, the heating mechanism 6 is mounted on a lifting drive module. Figure 3 to Figure 4 As shown, the film stripping mechanism 4 includes a first translation driving module 41, a first film stripping sheet 42 and a second film stripping sheet 43, wherein: the first translation driving module 41 is installed on the heating mechanism 6 via the mounting block 5. The first film stripping sheet 42 and the second film stripping sheet 43 are both slidably connected to the heating mechanism 6 and are transmission-connected to the first translation driving module 41.

[0105] After the heating mechanism 6 completes heating of the defective cell 101, it continues to drive the film stripping mechanism 4 to descend. At the same time, the first translation drive module 41 drives the first film stripping sheet 42 and the second film stripping sheet 42 to separate to both sides, so that the first film stripping sheet 42 and the second film stripping sheet 42 move obliquely downward respectively. During this process, the first film stripping sheet penetrates into the gap between the defective cell 101 and the first side adjacent cell 102, and is inserted between the first adjacent cell 102 and the first side film strip 103, until the first side film strip 103 is peeled off from the first adjacent cell 102. At the same time, the second film stripping sheet 43 penetrates into the gap between the defective cell 101 and the second side adjacent cell 104, and is inserted between the second adjacent cell 104 and the second side film strip 105, until the second side film strip 105 is peeled off from the second adjacent cell 104.

[0106] The film stripping mechanism 4 is integratedly mounted on the heating mechanism 6 , so that the film stripping mechanism 4 can be lowered along with the heating mechanism 6 , and there is no need to provide a separate lifting drive mechanism for the film stripping mechanism 4 , thereby reducing the equipment cost.

[0107] like Figure 4 As shown, optionally, the first translation driving module 41 includes a synchronous belt 412 installed on the heating mechanism 6 in the horizontal direction, and a synchronous belt driving member 411 arranged on the heating mechanism 6 to drive the synchronous belt 412 to rotate. The first film stripping sheet 42 is connected to the first side belt body (e.g., the upper side belt body) of the synchronous belt 412, and the second film stripping sheet 43 is connected to the second side belt body (e.g., the lower side belt body) of the synchronous belt 412. When the synchronous belt driving member 411 drives the synchronous belt 412 to rotate, it drives the first film stripping sheet 42 and the second film stripping sheet 43 to slide in opposite directions.

[0108] Optionally, the lower end of the first film stripping sheet 42 is provided with a plurality of first stripping teeth for stripping the first side film strip 103, and a first solder strip avoidance groove for avoiding the first side solder strip is formed between adjacent first stripping teeth. The lower end of the second film stripping sheet 43 is provided with a plurality of second stripping teeth for stripping the second side film strip, and a second solder strip avoidance groove for avoiding the second side solder strip is formed between adjacent second stripping teeth.

[0109] By providing a first stripping tooth at the lower end of the first stripping sheet 42, the first stripping sheet avoids the first side soldering strip when stripping the first side film strip from the first side adjacent battery cell 102, thereby preventing the first side soldering strip from being driven by the first stripping sheet 42 and being separated from the first side adjacent battery cell 102. Similarly, by providing a second stripping tooth at the lower end of the second stripping sheet 43, the second stripping sheet 43 avoids the second side soldering strip when stripping the second side film strip from the second side adjacent battery cell 104, thereby preventing the second side soldering strip from being driven by the second stripping sheet 43 and being separated from the second side adjacent battery cell 104.

[0110] Continue to refer Figure 4 As shown, optionally, the first stripping teeth are arranged obliquely and the thickness gradually decreases from top to bottom. Such an arrangement enables the first stripping teeth to be inserted more smoothly between the first side film strip 103 and the first side adjacent battery slice 102 when moving obliquely downward, so as to strip the first side film strip 103 from the first side adjacent battery slice 102. Similarly, the second stripping teeth are arranged obliquely and the thickness gradually decreases from top to bottom. Such an arrangement enables the second stripping teeth to be inserted more smoothly between the second side film strip 105 and the second side adjacent battery slice 104 when moving obliquely downward, so as to strip the second side film strip 105 from the second side adjacent battery slice 104.

[0111] In another embodiment, the film stripping mechanism 4 includes an independent first film stripping part and a second film stripping part, wherein: the first film stripping part is arranged on the first side of the heating mechanism 6, the first film stripping part includes a first driving module and a first film stripping sheet, the first film stripping sheet is connected to the driving end of the first driving module, and the first driving module is used to drive the first film stripping sheet to descend, so that the first film stripping sheet penetrates downward into the gap between the defective battery cell 101 and the first side adjacent battery cell 102. The first driving module is also used to drive the first film stripping sheet to translate toward the first side adjacent battery cell 102, so that the first film stripping sheet peels off the first side film strip 103 from the bottom of the first side adjacent battery cell 101. Similarly, the second stripping portion is arranged on the second side of the heating mechanism 6, and the second stripping portion includes a second driving module and a second stripping sheet, and the second stripping sheet is connected to the driving end of the second driving module, and the second driving module is used to drive the second stripping sheet to descend so that the second stripping sheet penetrates downward into the gap between the defective battery cell 101 and the second side adjacent battery cell 104, and the second driving module is also used to drive the second stripping sheet to translate toward the second side adjacent battery cell 104, so that the second stripping sheet peels off the second side film strip from the bottom of the second side adjacent battery cell 104.

[0112] After the heating mechanism 6 completes heating of the defective cell 101, the first driving module drives the first stripping sheet to descend and drives the first stripping sheet to translate toward the first side adjacent cell 104, so that the first stripping sheet moves downwardly at an angle. During this process, the first stripping sheet penetrates into the gap between the defective cell 101 and the first side adjacent cell 102, and is inserted between the first adjacent cell 102 and the first side film strip 103, until the first side film strip 103 is peeled off from the first adjacent cell 102. Similarly, the second driving module drives the second stripping sheet to descend and drives the second stripping sheet to translate toward the second side adjacent cell 104, so that the second stripping sheet moves downwardly at an angle. During this process, the second stripping sheet penetrates into the gap between the defective cell 101 and the second side adjacent cell 104, and is inserted between the second adjacent cell 104 and the second side film strip 105, until the second side film strip 105 is peeled off from the second adjacent cell 104. Since the first film stripping sheet and the second film stripping sheet are driven by their own independent driving modules, the independence and flexibility of the first film stripping sheet and the second film stripping sheet are improved.

[0113] Optionally, an intermediate pressing component is provided at the bottom of the heating mechanism 6, and the intermediate pressing component is used to press downward against the middle of the defective cell 101. After the film stripping mechanism 4 strips the first side film strip 103 and the second side film strip 105, the intermediate pressing component is driven by the heating mechanism 6 to descend, and finally presses against the middle of the defective cell 101, thereby flattening the defective cell 101 downward, so that it can be ensured that the defective cell 101 can be closely attached to the middle carrier 2 and be sucked and fixed by the middle carrier 2, and finally ensure that when the first side carrier 1 and the second side carrier 3 move away from the middle carrier 101 to both sides and separate, the defective cell 101 does not move with the first adjacent cell 102 and the second adjacent cell 103.

[0114] Optionally, the middle pressing assembly includes a plurality of rows of pressing pins arranged at intervals along the length direction of the rework table, and each row of pressing pins includes a plurality of rows of pressing pins arranged at intervals along the width direction of the rework table. At least two rows of pressing pins arranged at intervals along the length direction of the rework table press the defective battery cell 101 from different positions, thereby ensuring that the defective battery cell 101 can be pressed flat on the middle supporting table 2, and preventing the defective battery cell 101 from being damaged due to uneven pressure.

[0115] Optional, such as Figure 3 As shown, the defective battery cell removal mechanism in the embodiment of the present application also includes a first side pressing component 8 and a second side pressing component 9, wherein: the first side pressing component 8 is used to press downward against the first side adjacent battery cell 102, and the second side pressing component 9 is used to press downward against the second side adjacent battery cell 104.

[0116] Before the first side loading platform 1 and the second side loading platform 3 move away from the middle loading platform 2, the first side pressing component 8 and the second side pressing component 9 press the first side adjacent battery cell 102 and the second side adjacent battery cell 104 onto the first side loading platform 1 and the second side loading platform 3 respectively, thereby ensuring that the first side adjacent battery cell 102 and the second side adjacent battery cell 104 move with the first side loading platform 1 and the second side loading platform 2 respectively, and are separated from the defective battery cell 101.

[0117] Optionally, the second side pressing component 9 has the same structure as the first side pressing component 8. Taking the first side pressing component 8 as an example, it includes an adsorption member 81 and a pressing tool 82, wherein the adsorption member 81 is connected to the heating mechanism 6, the heating mechanism 6 is used to drive the adsorption member 81 to translate and rise and fall, and the pressing tool 82 is adsorbed on the adsorption member 81.

[0118] When the heating mechanism 6 moves to above the defective cell 101 to perform heating, the first side pressing assembly 8 and the second side pressing assembly 9 are driven by the heating mechanism 6 to move above the first side adjacent cell 102 and the second side adjacent cell 104 respectively.

[0119] Before the first side loading platform 1 and the second side loading platform 3 move away from the middle loading platform 2, the adsorbent 81 of the first side pressing component 8 releases the pressing tooling 82 adsorbed thereon, so that the pressing tooling 82 falls onto the first side adjacent battery slice 102, thereby pressing and fixing the first side adjacent battery slice 102 on the first side loading platform 1. Similarly, the adsorbent 81 of the second side pressing component 9 releases the pressing tooling 82 adsorbed thereon, so that the pressing tooling 82 falls onto the second side adjacent battery slice 104, thereby pressing and fixing the second side adjacent battery slice 104 on the second side loading platform 3.

[0120] The adsorption parts 81 of the first side pressing assembly 8 and the second side pressing assembly 9 are integrated and installed into the heating mechanism 6, so that the adsorption parts 81 of the first side pressing assembly 8 and the second side pressing assembly 9 can move with the heating mechanism 6. There is no need to set up additional moving parts for the adsorption parts 81 of the first side pressing assembly 8 and the second side pressing assembly 9, thereby reducing the equipment cost.

[0121] The adsorption member 81 may be, for example, an electromagnet adsorption member. The pressing tool 82 may be, for example, a steel plate tool on which a plurality of pressing pins are arranged.

[0122] Of course, in order to improve the independence and flexibility of the first side pressing component 8 and the second side pressing component 9, a moving part can also be set for the adsorption member 81 of the first side pressing component 8 and the second side pressing component 9. Still taking the first side pressing component 8 as an example, it includes a moving part, an adsorption member 81 and a pressing tool 82, wherein the moving part is arranged on one side of the rework station, the adsorption member 81 is connected to the driving end of the moving part, the moving part 83 is used to drive the adsorption member 81 to translate and rise and fall, and the pressing tool 82 is adsorbed on the adsorption member 81.

[0123] Optionally, the moving part includes a lifting module and a transverse movement module, wherein the lifting module is used to drive the adsorption part to lift and lower, and the transverse movement module is used to drive the adsorption part to move laterally. Both the lifting module and the transverse movement module can adopt various existing linear drive modules, such as a cylinder drive module composed of a cylinder and a slide rail pair.

[0124] like Figure 5 As shown, optionally, a third solder strip avoidance groove 21 for avoiding the first side solder strip and the second side solder strip is provided on the middle carrier 2, and the third solder strip avoidance groove 21 extends along the length direction of the rework station, and each third solder strip avoidance groove is used to accommodate a first side solder strip 106 or a second side solder strip 107. A clamping assembly 22 for clamping the corresponding first side solder strip 106 or second side solder strip 107 is provided in each third solder strip avoidance groove 21.

[0125] By arranging the third solder strip avoidance groove 21 on the intermediate supporting platform 2, the first side solder strip and the second side solder strip on the defective battery cell 101 are guided and avoided. On the one hand, it can prevent the first side solder strip and the second side solder strip on the defective battery cell from being pressed on the intermediate supporting platform by the defective battery cell, ensuring that when the first side supporting platform and the second side supporting platform move away from the intermediate supporting platform, the first side solder strip and the second side solder strip after desoldering with the defective battery cell can move smoothly relative to the defective battery cell. On the other hand, the first side solder strip and the second side solder strip can be guided and limited during their movement.

[0126] By arranging a clamping assembly 22 in the third solder strip avoidance groove 21, the first side solder strip and the second side solder strip are limited and guided, so that the first side solder strip and the second side solder strip always remain in the third solder strip avoidance groove 21 during the movement relative to the defective battery cell 101.

[0127] Optionally, the intermediate carrier 2 is further provided with a mounting groove 23 extending along the width direction of the rework station, and the mounting groove 23 runs through all the third solder strip avoidance grooves 21. The defective cell rejection mechanism in the embodiment of the present application also includes a first clamping plate 24, a second clamping plate 25 and a clamping drive unit 26, wherein the first clamping plate 24 and the second clamping plate 25 are stacked up and down in the mounting groove 23, and a first clamping jaw 221 is provided at the position corresponding to each second solder strip avoidance groove 21 on the first clamping plate 24, and a second clamping jaw 222 matched with the first clamping jaw 221 is provided at the position corresponding to each second solder strip avoidance groove 21 on the second clamping plate 25, and each second clamping jaw 222 and the corresponding first clamping jaw 221 constitute a clamping assembly 22. The clamping drive part 26 is arranged below the middle supporting platform 2, and the clamping drive part 26 is transmission-connected with the first clamping plate 24 and the second clamping plate 25. The clamping drive part 26 is used to drive the first clamping plate 24 and the second clamping plate 25 to move in opposite directions in the mounting groove 23, so as to drive each clamping assembly 22 to close or open synchronously, and guide the first side welding strip 106 or the second side welding strip 107 when the clamping assembly 22 closes.

[0128] like Figures 6 to 9 As shown, optionally, the clamping driving part 26 includes a first lifting driving member 261, a first connecting rod 262, a second lifting driving member 263 and a second connecting rod 264, wherein: the first connecting rod 262 is an L-shaped structure, one end of the first connecting rod 262 is connected to the driving end of the first lifting driving member 261, and the other end of the first connecting rod 262 is connected to the first end of the first clamping plate 24, and the first end of the first clamping plate 24 is close to the first end of the installation groove 23. The second connecting rod 264 is an L-shaped structure, one end of the second connecting rod 264 is connected to the driving end of the second lifting driving member 263, and the other end of the second connecting rod 264 is connected to the second end of the second clamping plate 25, and the second end of the second clamping plate 25 is close to the second end of the installation groove 23. When the first lifting driving member 261 drives the first clamping plate 24 to move in the installation groove 23 via the first connecting rod 262, the second lifting driving member 263 drives the second clamping plate 25 to move in the opposite direction of the first clamping plate 24 in the installation groove 23 via the second connecting rod 264.

[0129] Optionally, a first waist hole is provided on one end of the first connecting rod 262 and the driving end of the first lifting driving member 261, and a first connecting shaft is provided on the other end, and the first connecting shaft is connected to the first waist hole and can move in the first waist hole. The other end of the first connecting rod 262 is fixedly connected to the first end of the first clamping plate 24, so that when the first lifting driving member 261 drives the first connecting rod 262 to rise, the first connecting rod 262 can rotate, thereby driving the first clamping plate 24 to translate in the installation groove 23. Similarly, a second waist hole is provided on one end of the second connecting rod 264 and the driving end of the second lifting driving member 263, and a second connecting shaft is provided on the other end, and the second connecting shaft is connected to the second waist hole and can move in the second waist hole. The other end of the second connecting rod 264 is fixedly connected to the second end of the second clamping plate 25, so that when the second lifting driving member 263 drives the second connecting rod 264 to rise, the second connecting rod 264 can rotate, thereby driving the second clamping plate 25 to translate in the installation groove 23. The first lifting drive member 261 and the second lifting drive member 263 can both be cylinders.

[0130] In order to achieve the sliding guide of the second clamping plate 25 and the first clamping plate 24, and prevent the second clamping plate 25 and the first clamping plate 24 from getting stuck during the reverse sliding process. Optionally, the first clamping plate 24 is provided with a first guide hole, and the second clamping plate 25 is provided with a second guide hole matched with the first guide hole, and the first guide hole and the second guide hole both extend along the width direction of the rework station, and the first clamping plate 24 and the second clamping plate 25 are slidably connected via the connecting pin 27 inserted into the first guide hole and the second guide hole.

[0131] like Figure 5 As shown, optionally, the middle platform 2 is further provided with a first suction cup 28 located between adjacent third solder strip avoidance grooves 21, and the first suction cup 28 is used to absorb defective battery cells. The first side platform 1 is provided with a second suction cup at one end close to the middle platform 2, and the second suction cup is used to absorb the first side adjacent battery cells. The second side platform 3 is provided with a third suction cup at one end close to the middle platform 2, and the third suction cup is used to absorb the second side adjacent battery cells.

[0132] By setting a first suction cup 28 on the middle platform 2, the defective cell can be fixed on the middle platform 2 by suction. By setting a second suction cup on the first side platform 1, the first side adjacent cell is fixed on the first side platform 1 by suction. By setting a third suction cup on the second side platform 3, the second side adjacent cell is fixed on the second side platform 3 by suction. In this way, when the first side platform 1 and the second side platform 3 move away from the middle platform 2, it can be ensured that the first side adjacent cell and the second side adjacent cell are separated from the defective cell.

[0133] Optionally, a heating component is provided in the middle support platform 2, and the heating component is used to cooperate with the heating mechanism 6 to heat the defective battery cell, thereby shortening the softening time of the first side film strip and the second side film strip, and shortening the desoldering time of the first side solder strip, the second side solder strip and the defective battery cell. The heating component can be a heating rod, a heating wire, a thermocouple, etc.

[0134] Optionally, a heating component is also provided on one end of the first side platform 1 close to the middle platform 2 and one end of the second side platform 3 close to the middle platform 2. When the heating mechanism 6 heats the defective battery cell, the solder joints at the edges of the first side adjacent battery cell and the second side adjacent battery cell may also be melted by the heat. By providing a heating component at one end of the first side platform 1 close to the middle platform 2, when welding and replacing the battery cell, the heating component at one end of the first side platform 1 close to the middle platform 2 can heat the first side adjacent battery cell, so that the melted solder joints on the first side adjacent battery cell are re-welded. Similarly, by providing a heating component at one end of the second side platform 3 close to the middle platform 2, when welding and replacing the battery cell, the heating component at one end of the second side platform 3 close to the middle platform 2 can heat the second side adjacent battery cell, so that the melted solder joints on the second side adjacent battery cell are re-welded.

[0135] The present application also provides a defective battery cell removal method, which can automatically remove the defective battery cell and the film strips adhered to the edges on both sides thereof from the IBC battery string (referred to as the battery string), thereby improving the defective battery cell removal efficiency.

[0136] The defective battery cell removal method of the present application includes:

[0137] Step S1, heating the defective battery cell in the battery string with the back side facing downward, so that the first side solder strip and the second side solder strip on the back side of the defective battery cell are desoldered from the defective battery cell, and the first side film strip and the second side film strip on the back side of the defective battery cell are softened, wherein the first side solder strip is welded to the defective battery cell and the back side of the battery cell adjacent to the first side of the defective battery cell, the second side solder strip is welded to the defective battery cell and the back side of the battery cell adjacent to the second side of the defective battery cell, the first side film strip is a film strip bonded to the first side edge of the defective battery cell, and the second side film strip is a film strip bonded to the second side edge of the defective battery cell.

[0138] Step S2, peeling off the first side film strip softened by heat from the bottom of the first side adjacent to the battery cell; peeling off the second side film strip softened by heat from the bottom of the second side adjacent to the battery cell.

[0139] Step S3, controlling all the battery cells on the first side of the defective battery cell in the battery string to move away from the defective battery cell, so that the first side film strip is separated from the battery cell adjacent to the first side; controlling all the battery cells on the second side of the defective battery cell in the battery string to move away from the defective battery cell, so that the second side film strip is separated from the battery cell adjacent to the second side.

[0140] Step S4: removing the defective battery cell with the first side film strip and the second side film strip from the battery string.

[0141] Heat the defective cell so that the first side solder strip and the second side solder strip on the back of the defective cell are desoldered from the defective cell, and the first side film strip and the second side film strip at the edges of both sides of the defective cell are softened. Next, peel off the first side film strip softened by heat from the bottom of the cell adjacent to the first side. Peel off the second side film strip softened by heat from the bottom of the cell adjacent to the second side. Next, control the cells on both sides of the defective cell in the battery string to move away from the defective cell, so that the first side film strip softened by heat is separated from the cell adjacent to the first side, the second side film strip softened by heat is separated from the cell adjacent to the second side, and the first side solder strip and the second side solder strip on the back of the defective cell are both separated from the defective cell. Finally, remove the defective cell with the first side film strip and the second side film strip from the middle carrier.

[0142] It can be seen that the defective battery cell removal method provided in the present application can automatically remove the defective battery cell and the film strips adhered to the edges on both sides thereof from the IBC battery string at the same time, thereby improving the defective battery cell removal efficiency.

[0143] Optionally, step S2 further includes: pressing against the defective cell from above. By pressing against the middle of the defective cell from above, the defective cell is flattened so that the defective cell can be closely attached to the middle support platform and adsorbed by the middle support platform. Finally, it is ensured that when the cells on both sides of the defective cell move away from the defective cell, the defective cell does not move with the first adjacent cell and the second adjacent cell.

[0144] Optionally, step S2 further includes: pressing the adjacent battery cell on the first side from above, and pressing the adjacent battery cell on the second side from above, so as to further limit the adjacent battery cells on both sides and prevent the adjacent battery cells from shifting during the movement.

[0145] The defective battery cell removal method in the embodiment of the present application can be implemented by the defective battery cell removal device in any of the previous embodiments. For further implementation details, please refer to the relevant description of the defective battery cell removal device in the previous embodiments, which will not be repeated here.

[0146] The present application also provides a repair device, which includes the defective battery cell rejection mechanism in any of the above embodiments.

[0147] After the defective battery cell is removed from the intermediate supporting platform 2, the transport mechanism is also used to transport the replacement battery cell with its back side facing downward to the intermediate supporting platform 2, and the first side replacement film strip and the second side replacement film strip are respectively adhered to the two side edges of the back side of the replacement battery cell.

[0148] The first side loading platform 1 is also configured to rise relative to the middle loading platform, so that a first insertion gap is generated between the first side adjacent battery cell and the first side welding strip. The second side loading platform 3 is also configured to rise relative to the middle loading platform 2, so that a second insertion gap is generated between the second side adjacent battery cell and the second side welding strip.

[0149] The first side support platform 1 is also used to move toward the middle support platform 2 so that the first side replacement film strip can be inserted into the first insertion gap; the second side support platform 3 is also used to move toward the middle support platform 2 so that the second side replacement film strip can be inserted into the second insertion gap.

[0150] The first side loading platform 1 is also used to descend and return to its original position relative to the middle loading platform 2, so that the first side replacement film strip inserted into the first insertion gap contacts the first side adjacent battery cell. The second side loading platform 3 is also used to descend and return to its original position relative to the middle loading platform 2, so that the second side replacement film strip inserted into the second insertion gap contacts the second side adjacent battery cell.

[0151] The heating mechanism 6 is also used to heat the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is adhered to the back side of the battery cell adjacent to the first side, and the second side replacement film strip is adhered to the back side of the battery cell adjacent to the second side.

[0152] In order to enable those skilled in the art to more clearly understand the working process of the defective battery cell rejection mechanism in the embodiment of the present application, the following will continue to combine Figures 1 to 3 , the working process of the rework device in the embodiment of the present application is described in detail.

[0153] First, the defective cell 101 and the first side film strip 103 and the second side film strip 105 thereon are disassembled from the battery string by the defective cell rejection mechanism, and the disassembled defective cell with the first side film strip 103 and the second side film strip 105 is removed from the middle supporting platform 2. The specific disassembly process of the defective cell 101 and the first side film strip 103 and the second side film strip 105 thereon has been described in detail above, so it will not be repeated here.

[0154] Next, the replacement battery cell is transported to the middle loading platform 2 with the back side facing downward by the transport mechanism.

[0155] Next, the first side loading platform 1 is controlled to rise relative to the middle loading platform 2, so that a first insertion gap is generated between the first side adjacent battery cell 102 and the first side welding strip. Simultaneously, the second side loading platform 3 is controlled to rise relative to the middle loading platform 2, so that a second insertion gap is generated between the second side adjacent battery cell 104 and the second side welding strip.

[0156] Next, the first side loading platform 1 is controlled to move back toward the middle loading platform 2 so that the first side replacement film strip is inserted into the first insertion gap. Simultaneously, the second side loading platform 3 is controlled to move back toward the middle loading platform 2 so that the second side replacement film strip is inserted into the second insertion gap.

[0157] Next, the first side loading platform 1 is controlled to descend relative to the middle loading platform 2, so that the first side replacement film strip inserted into the first insertion gap contacts the first side adjacent battery cell 102. Simultaneously, the second side loading platform 3 is controlled to descend relative to the middle loading platform 2, so that the second side replacement film strip inserted into the second insertion gap contacts the second side adjacent battery cell 104.

[0158] Finally, the heating mechanism 6 is controlled to heat the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is adhered to the back side of the battery cell adjacent to the first side, and the second side replacement film strip is adhered to the back side of the battery cell adjacent to the second side.

[0159] It can be seen that the repair device in the embodiment of the present application can automatically remove the defective battery cell and the membrane strip bonded to it from the IBC battery string at the same time, and connect the replacement battery cell bonded with the first side replacement membrane strip and the second side replacement membrane strip to the position vacated after the defective battery cell is removed, thereby realizing the automatic repair of the IBC battery string with membrane strips.

[0160] like Figures 7 to 9 As shown, optionally, each third solder strip avoidance groove 21 is provided with a lifting hole that passes through the middle bearing platform 2. The defective battery cell rejection mechanism also includes a solder strip lifting assembly 29, which includes a second lifting drive unit 291, a pin mounting plate 292, and a plurality of pins 293, wherein: the pin mounting plate 292 is connected to the driving end of the second lifting drive unit 291, and a plurality of pins 293 are mounted on the pin mounting plate 292 and correspond to the lifting holes one by one, and each pin 293 is inserted into the corresponding lifting hole. The second lifting drive unit 291 is used to drive the pin mounting plate 292 to rise, so that the upper end of each pin 293 is upwardly inserted into the corresponding third solder strip avoidance groove 21, so as to press the first side solder strip or the second side solder strip located in the third solder strip avoidance groove 21 against the back of the replacement battery cell.

[0161] By lifting the welding strip lifting assembly 29, the first side welding strip and the second side welding strip can be pressed against the back of the replacement battery cell before welding, ultimately ensuring that the first side welding strip and the second side welding strip can be firmly welded to the back of the replacement battery cell.

[0162] In the case where the bottom of the heating mechanism 6 is provided with an intermediate pressing component, when the welding strip lifting component 29 presses the first side welding strip and the second side welding strip against the back of the replacement battery cell, the intermediate pressing component is lowered under the drive of the heating mechanism 6, thereby pressing the replacement battery cell from above. The heating mechanism 6 then heats the replacement battery cell, so that the first side welding strip and the second side welding strip are welded to the back of the replacement battery cell, and the first side replacement film strip is bonded to the back of the battery cell adjacent to the first side, and the second side replacement film strip is bonded to the back of the battery cell adjacent to the second side.

[0163] Optionally, the repair device in the embodiment of the present application also includes a replacement battery cell supply mechanism, which is used to adhere the first side replacement film strip and the second side replacement film strip to the two side edges of the back side of the battery cell to produce a replacement battery cell.

[0164] Optionally, the replacement battery cell supply mechanism includes a heating table, a film strip loading portion and a battery cell loading portion. The film strip loading portion is used to lay two film strips on the heating table at intervals, and the battery cell loading portion is used to lay the battery cell on top of the two film strips so that the two film strips are respectively located on both side edges of the battery cell. Finally, the heating table heats the film strip so that the film strip is bonded to the battery cell to obtain a replacement battery cell.

[0165] By providing a replacement cell supply mechanism, automatic preparation of a replacement cell with a first-side replacement film strip and a second-side replacement film strip is achieved.

[0166] The present application also provides a repair method, which includes:

[0167] The defective battery cells are removed from the battery string by the defective battery cell removal method provided in any of the above embodiments. The specific removal process of the defective battery cells has been described in detail in the above embodiments and will not be repeated here.

[0168] Step S5, transporting the replacement cell with its back side facing downward to the position vacated after the defective cell is removed, wherein the first side replacement film strip and the second side replacement film strip are respectively adhered to the two side edges of the back side of the replacement cell.

[0169] Step S6, controlling all the battery cells on the first side of the defective battery cell in the battery string to rise relative to the replacement battery cell, so that a first insertion gap is generated between the adjacent battery cells on the first side and the first side welding strip; controlling all the battery cells on the second side of the defective battery cell in the battery string to rise relative to the replacement battery cell, so that a second insertion gap is generated between the adjacent battery cells on the second side and the second side welding strip.

[0170] Step S7, control all the battery cells on the first side of the defective battery cell in the battery string to move toward the replacement battery cell, so that the first side replacement film strip is inserted into the first insertion gap; control all the battery cells on the second side of the defective battery cell in the battery string to move toward the replacement battery cell, so that the second side replacement film strip is inserted into the second insertion gap.

[0171] Step S8, control all the battery cells on the first side of the defective battery cell in the battery string to descend and return to their positions, so that the first side replacement membrane strip inserted into the first insertion gap contacts the adjacent battery cell on the first side; control all the battery cells on the second side of the defective battery cell in the battery string to descend and return to their positions, so that the second side replacement membrane strip inserted into the second insertion gap contacts the adjacent battery cell on the second side.

[0172] Step S9, heating the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is adhered to the back side of the battery cell adjacent to the first side, and the second side replacement film strip is adhered to the back side of the battery cell adjacent to the second side.

[0173] The repair method in the embodiment of the present application realizes the removal of defective battery cells and the film strips bonded to them from the IBC battery string at the same time, and connects the replacement battery cells bonded with the first side replacement film strip and the second side replacement film strip to the position vacated after the defective battery cells are removed, thereby realizing the automatic repair of the IBC battery string with film strips.

[0174] Optionally, after step S8 and before step S9, the rework method further includes: lifting up the first side solder strip and the second side solder strip located below the replacement battery cell so that the first side solder strip and the second side solder strip are tightly attached to the back side of the replacement battery cell.

[0175] By lifting the first side welding strip and the second side welding strip upward, the first side welding strip and the second side welding strip can be pressed against the back side of the replacement battery cell, ultimately ensuring that the first side welding strip and the second side welding strip can be firmly welded to the back side of the replacement battery cell.

[0176] The present application is described in sufficient detail above with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A defective battery cell rejection mechanism, characterized in that: Used to remove defective battery cells in a battery string, wherein the battery string is formed by welding IBC battery cells with welding strips, film strips are bonded between adjacent battery cells in the battery string and at the edges of battery cells at the ends of the battery string, and the film strips are located between the corresponding battery cells and the welding strips, and the defective battery cell removal mechanism includes a rework station, a heating mechanism, a film stripping mechanism and a transport mechanism, wherein: The rework station comprises 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 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 all battery cells in the battery string located on a first side of the defective battery cell, the second side loading platform is located on a second side of the middle loading platform, the second side loading platform is used to load all battery cells in the battery string located on a second side of the defective battery cell; the back side of the battery string faces downward; The heating mechanism is arranged above the intermediate carrier, and is used to heat the defective battery cell so that the first side welding strip and the second side welding strip on the back of the defective battery cell are de-soldered from the defective battery cell, and the first side film strip and the second side film strip are softened, wherein the first side welding strip is welded to the back of the defective battery cell and the battery cell adjacent to the first side, the second side welding strip is welded to the back of the defective battery cell and the battery cell adjacent to the second side, the first side film strip is a film strip bonded to the first side edge of the defective battery cell, and the second side film strip is a film strip bonded to the second side edge of the defective battery cell; The film stripping mechanism is used to penetrate downward into the gap between the defective battery cell and the first side adjacent battery cell to strip the first side film strip softened by heat from the first side adjacent battery cell; The film stripping mechanism is further used to penetrate downward into the gap between the defective battery cell and the second side adjacent battery cell to strip the heat-softened second side film strip from the second side adjacent battery cell; The first side loading platform and the second side loading platform can both move away from the middle loading platform, so that the first side film strip softened by heat is separated from the first side adjacent battery slice in the horizontal direction, and the second side film strip softened by heat is separated from the second side adjacent battery slice in the horizontal direction; The transport mechanism is used to remove the defective battery sheet with the first side film strip and the second side film strip from the middle carrying platform.

2. The defective cell rejection mechanism according to claim 1, characterized in that: The heating mechanism is configured to be liftable, and the film stripping mechanism includes a first translation driving module, a first film stripping sheet and a second film stripping sheet, wherein: The first translation driving module is arranged on the heating mechanism, the first film stripping sheet and the second film stripping sheet are both slidably connected to the heating mechanism and are drivingly connected to the first translation driving module; When the heating mechanism descends, the first stripping sheet is driven to penetrate downward into the gap between the defective cell and the first adjacent cell, and the second stripping sheet is driven to penetrate downward into the gap between the defective cell and the second adjacent cell; The first translation driving module is used to drive the first film stripping sheet and the second film stripping sheet to move in opposite directions.

3. The defective battery cell rejection mechanism according to claim 2, characterized in that: The first translation driving module comprises a synchronous belt installed on the heating mechanism along a horizontal direction, and a synchronous belt driving member arranged on the heating mechanism to drive the synchronous belt to rotate; The first film stripping sheet is connected to the first side belt body of the synchronous belt, and the second film stripping sheet is connected to the second side belt body of the synchronous belt. When the synchronous belt driving member drives the synchronous belt to rotate, the first film stripping sheet and the second film stripping sheet are driven to slide in opposite directions.

4. The defective cell rejection mechanism according to claim 2, characterized in that: A plurality of first stripping teeth for stripping the first side film strip are disposed at the lower end of the first stripping sheet, and a first solder strip avoidance groove for avoiding the first side solder strip is formed between adjacent first stripping teeth; A plurality of second stripping teeth for stripping the second side film strip are disposed at the lower end of the second stripping sheet, and a second soldering strip avoiding groove for avoiding the second side soldering strip is formed between adjacent second stripping teeth.

5. The defective battery cell rejection mechanism according to claim 4, characterized in that: The first stripping teeth are arranged obliquely and the thickness thereof gradually decreases from top to bottom. The second stripping teeth are arranged obliquely and the thickness thereof gradually decreases from top to bottom.

6. The defective battery cell rejection mechanism according to claim 1, characterized in that: The film stripping mechanism comprises a first film stripping part and a second film stripping part, wherein: The first film stripping part is arranged on the first side of the heating mechanism, and the first film stripping part comprises a first driving module and a first film stripping sheet, wherein the first film stripping sheet is connected to the driving end of the first driving module, and the first driving module is used to drive the first film stripping sheet to descend, so that the first film stripping sheet penetrates downward into the gap between the defective battery cell and the first side adjacent battery cell, and the first driving module is also used to drive the first film stripping sheet to translate toward the first side adjacent battery cell, so that the first film stripping sheet peels off the first side film strip from the bottom of the first side adjacent battery cell; The second stripping portion is arranged on the second side of the heating mechanism, and the second stripping portion includes a second driving module and a second stripping sheet, and the second stripping sheet is connected to the driving end of the second driving module, and the second driving module is used to drive the second stripping sheet to descend so that the second stripping sheet penetrates downward into the gap between the defective battery cell and the battery cell adjacent to the second side, and the second driving module is also used to drive the second stripping sheet to translate toward the battery cell adjacent to the second side, so that the second stripping sheet peels off the second side film strip from the bottom of the battery cell adjacent to the second side.

7. The defective battery cell rejection mechanism according to claim 1, characterized in that: The bottom of the heating mechanism is provided with an intermediate pressing component, and the intermediate pressing component is used to press downward against the middle part of the defective battery sheet.

8. The defective battery cell rejection mechanism according to claim 7, characterized in that: The intermediate pressing assembly includes a plurality of pressing needle rows arranged at intervals along the length direction of the rework table, and each of the pressing needle rows includes a plurality of pressing needles arranged at intervals along the width direction of the rework table.

9. The defective battery cell rejection mechanism according to claim 1, characterized in that: The defective cell rejection mechanism also includes a first side pressing component and a second side pressing component, wherein: the first side pressing component is used to press downward against the first side adjacent cell, and the second side pressing component is used to press downward against the second side adjacent cell.

10. The defective battery cell rejection mechanism according to claim 9, characterized in that: The second side pressing assembly has the same structure as the first side pressing assembly; The first side pressing assembly includes an adsorption member and a pressing tool, wherein the adsorption member is connected to the heating mechanism, the heating mechanism is used to drive the adsorption member to translate and lift, and the pressing tool is adsorbed on the adsorption member; or, The first side pressing assembly includes a moving part, an adsorption part and a pressing tool, wherein the moving part is arranged on one side of the rework station, the adsorption part is connected to the driving end of the moving part, the moving part is used to drive the adsorption part to translate and rise and fall, and the pressing tool is adsorbed on the adsorption part.

11. The defective battery cell rejection mechanism according to claim 1, characterized in that: The middle carrying platform is provided with a third solder strip avoidance groove for avoiding the first side solder strip and the second side solder strip, the third solder strip avoidance groove extends along the length direction of the rework platform, and each of the third solder strip avoidance grooves is used to accommodate one first side solder strip or one second side solder strip; A clamping assembly for clamping the corresponding first side welding strip or the second side welding strip is arranged in each of the third welding strip avoidance grooves.

12. The defective battery cell rejection mechanism according to claim 11, characterized in that: The intermediate loading platform is also provided with a mounting groove extending along the width direction of the rework platform, and the mounting groove runs through all the third welding strip avoidance grooves; The defective battery cell rejection mechanism further includes a first clamping plate, a second clamping plate and a clamping drive unit, wherein the first clamping plate and the second clamping plate are stacked up and down in the mounting groove, a first clamping claw is arranged at a position of the first clamping plate corresponding to each of the third welding strip avoidance grooves, and a second clamping claw matched with the first clamping claw is arranged at a position of the second clamping plate corresponding to each of the third welding strip avoidance grooves, and each of the second clamping claws and the corresponding first clamping claw constitute a clamping assembly; The clamping drive part is arranged below the intermediate supporting platform, and the clamping drive part is transmission connected with the first clamping plate and the second clamping plate. The clamping drive part is used to drive the first clamping plate and the second clamping plate to move in opposite directions in the mounting groove, so as to drive each of the clamping components to be clamped or opened synchronously. When the clamping components are clamped, they clamp the corresponding first side welding strip or the second side welding strip to guide the first side welding strip or the second side welding strip, and position the first side welding strip or the second side welding strip on the intermediate supporting platform.

13. The defective battery cell rejection mechanism according to claim 12, characterized in that: The clamping drive unit includes a first lifting drive member, a first connecting rod, a second lifting drive member and a second connecting rod, wherein: The first connecting rod is an L-shaped structure, one end of the first connecting rod is connected to the driving end of the first lifting driving member, and the other end of the first connecting rod is connected to the first end of the first clamping plate, and the first end of the first clamping plate is close to the first end of the mounting groove; The second connecting rod is an L-shaped structure, one end of the second connecting rod is connected to the driving end of the second lifting driving member, the other end of the second connecting rod is connected to the second end of the second clamping plate, and the second end of the second clamping plate is close to the second end of the mounting groove; When the first lifting driving member drives the first clamping plate to move in the installation slot via the first connecting rod, the second lifting driving member drives the first clamping plate to move in the installation slot in the opposite direction to the first clamping plate via the second connecting rod.

14. The defective battery cell rejection mechanism according to claim 12, characterized in that: A first guide hole is provided on the first clamping plate, and a second guide hole matching the first guide hole is provided on the second clamping plate. The first guide hole and the second guide hole both extend along the width direction of the rework table, and the first clamping plate and the second clamping plate are slidably connected via connecting pins passing through the first guide hole and the second guide hole.

15. The defective battery cell rejection mechanism according to claim 11, characterized in that: The intermediate carrying platform is also provided with a first suction cup located between the adjacent third welding strip avoidance grooves, and the first suction cup is used to absorb the defective battery cell; A second suction cup is provided at one end of the first side bearing platform close to the middle bearing platform, and the second suction cup is used to absorb the adjacent battery sheet on the first side; A third suction cup is disposed at one end of the second side support platform close to the middle support platform, and the third suction cup is used for adsorbing the adjacent battery cell on the second side.

16. The defective battery cell rejection mechanism according to claim 1, characterized in that: A heating component is disposed in the intermediate supporting platform, and the heating component is used to cooperate with the heating mechanism to heat the defective battery cell.

17. A repair device, characterized in that: The repair device comprises a defective battery cell rejection mechanism as claimed in any one of claims 1 to 16; After the defective battery cell is removed from the intermediate loading platform, the transport mechanism is further used to transport the replacement battery cell with its back side facing downward to the intermediate loading platform, and the first side replacement film strip and the second side replacement film strip are respectively bonded to the two side edges of the back side of the replacement battery cell; The first side loading platform is further configured to rise relative to the middle loading platform, so that a first insertion gap is generated between the first side adjacent battery cell and the first side welding strip; the second side loading platform is further configured to rise relative to the middle loading platform, so that a second insertion gap is generated between the second side adjacent battery cell and the second side welding strip; The first side loading platform is also used to move toward the middle loading platform to return to its original position, so that the first side replacement film strip is inserted into the first insertion gap; the second side loading platform is also used to move toward the middle loading platform to return to its original position, so that the second side replacement film strip is inserted into the second insertion gap; The first side loading platform is further used to descend and return to its original position relative to the middle loading platform, so that the first side replacement film strip inserted into the first insertion gap contacts the first side adjacent battery slice; the second side loading platform is further used to descend and return to its original position relative to the middle loading platform, so that the second side replacement film strip inserted into the second insertion gap contacts the second side adjacent battery slice; The heating mechanism is also used to heat the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is adhered to the back side of the adjacent battery cell on the first side, and the second side replacement film strip is adhered to the back side of the adjacent battery cell on the second side.

18. The repair device according to claim 17, characterized in that: The defective battery cell rejection mechanism is the defective battery cell rejection mechanism according to claim 11; Each of the third welding strip avoidance grooves is provided with a lifting hole penetrating through the intermediate bearing platform; The defective cell rejection mechanism further includes a solder strip lifting assembly, which includes a second lifting drive unit, a pin mounting plate and a plurality of pins, wherein: The ejector mounting plate is connected to the driving end of the second ejection driving part, a plurality of ejectors are mounted on the ejector mounting plate and correspond to the ejection holes one by one, and each ejector is inserted into the corresponding ejection hole; The second lifting drive unit is used to drive the ejector mounting plate to rise so that the upper end of each ejector is inserted upward into the corresponding third solder strip avoidance groove to press the first side solder strip or the second side solder strip located in the third solder strip avoidance groove against the back side of the replacement battery cell.

19. The repair device according to claim 17, characterized in that: The repair device also includes a replacement battery cell supply mechanism, which is used to adhere the first side replacement film strip and the second side replacement film strip to the two side edges of the back side of the replacement battery cell to obtain the replacement battery cell.

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