Defective cell removal mechanism and repair device

Abstract

The present application provides a defective battery cell rejection mechanism and a rework device, wherein the defective battery cell rejection mechanism includes a rework station, a heating mechanism and a conveying mechanism. The rework station includes an intermediate carrier for carrying defective battery cells, and a first side carrier and a second side carrier for carrying battery cells on both sides of the defective battery cell. The heating mechanism heats the defective battery cell so that the soldering ribbon on the defective battery cell is desoldered and the film strip is softened. The ends of the first side carrier and the second side carrier close to the intermediate carrier are rotated upward relative to the intermediate carrier, so that the film strip on the defective battery cell is separated from the adjacent battery cell. The first side carrier and the second side carrier are then moved away from the intermediate carrier, so that the film strip on the defective battery cell is completely separated from the adjacent battery cell. The conveying mechanism removes the defective battery cell from the intermediate carrier. The present application automatically removes the defective battery cell and the film strip 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 order to solve the technical problem that the conventional battery string repair machine cannot remove defective battery cells of the IBC battery string with film strips, the first aspect of the present application provides a defective battery cell removal mechanism, which adopts the following technical solution:

[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 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:

[0009] The middle supporting platform is used to support and absorb the defective battery cells in the battery string and the film strips bonded to the edges of both sides of the defective battery cells, with the back of the battery string facing downward;

[0010] The first side loading platform is located at a first side of the middle loading platform, and the first side loading platform is used to load the battery cell located at a first side of the defective battery cell, wherein the first end of the first side loading platform is configured to absorb the first side adjacent battery cell adjacent to the defective battery cell;

[0011] The second side loading platform is located on the second side of the middle loading platform, and the second side loading platform is used to load the battery cell located on the second side of the defective battery cell, wherein the second end of the second side loading platform is configured to absorb the second side adjacent battery cell adjacent to the defective battery cell;

[0012] The heating mechanism is configured to be able to move above the middle carrier 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 desoldered from the defective battery cell, and the film strips on the edges of both sides of the defective battery cell are softened;

[0013] The first end of the first side loading platform is configured to be able to rotate upwards, so that the first side film strip softened by heat is separated from the first side adjacent battery cell, and a first gap is generated between the first side adjacent battery cell and the first side welding strip; the first side loading platform is also configured to be able to move away from the middle loading platform, so that the first side film strip is separated from the first side adjacent battery cell, and the first side film strip is a film strip bonded between the defective battery cell and the first side adjacent battery cell;

[0014] The second end of the second side loading platform is configured to be able to rotate upwards, so that the second side film strip softened by heat is separated from the second side adjacent battery cell, and a second gap is generated between the second side adjacent battery cell and the second side welding strip; the second side loading platform is also configured to be able to move away from the middle loading platform, so that the second side film strip is separated from the second side adjacent battery cell, and the second side film strip is a film strip bonded between the defective battery cell and the second side adjacent battery cell;

[0015] The transport mechanism is used to remove defective battery cells with film strips from the middle carrying platform.

[0016] The IBC battery string to be repaired is placed with the back side facing downward on the repair platform, the defective battery cell is located on the middle platform, all the battery cells located on the first side of the defective battery cell are located on the first side platform, and the first side adjacent battery cells adjacent to the defective battery cell are adsorbed by the first end of the first side platform; all the battery cells located on the second side of the defective battery cell are located on the second side platform, and the second side adjacent battery cells adjacent to the defective battery cell are adsorbed by the second end of the second side platform; the defective battery cell is heated by a heating mechanism, 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 defective battery cell is desoldered. The film strips on both sides of the trapped battery cell are softened; then, the first end of the first side support platform and the second end of the second side support platform are controlled to rotate upward, so that the heat-softened first side film strip is separated from the adjacent battery cell on the first side, and the heat-softened second side film strip is separated from the adjacent battery cell on the second side; then, the first side support platform and the second side support platform are controlled to move away from the middle support platform, so that the first side film strip is separated from the adjacent battery cell on the first side in the horizontal direction, and the second side film strip is separated from the adjacent battery cell on the second side in the horizontal direction; finally, the defective battery cell with the first side film strip and the second side film strip is removed from the middle support platform by the conveying mechanism. The defective battery cell removal mechanism 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 and preparing for the subsequent repair of the IBC battery string.

[0017] In some embodiments, an intermediate pressing component is disposed at the bottom of the heating mechanism, and the intermediate pressing component is used to press downward against the defective battery cell.

[0018] After the middle pressing assembly moves to the top of the defective battery cell with the heating mechanism, the middle pressing assembly presses downward against the defective battery cell, thereby flattening the defective battery cell downward, thereby ensuring that the defective battery cell can be tightly attached and fixed by the middle supporting platform, and the first side film strip and the second side film strip are pressed between the defective battery cell and the middle supporting platform, ultimately ensuring that when the first end of the first side supporting platform and the second end of the second side supporting platform rotate upward, the first side film strip and the second film strip softened by heat can smoothly detach from the first side adjacent battery cell and the second side adjacent battery cell, and the first side film strip and the second side film strip will not detach from the defective battery cell.

[0019] 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.

[0020] By controlling the first side pressing component and the second side pressing component to press against the first side adjacent battery cell and the second side adjacent battery cell respectively, the first side adjacent battery cell and the second side adjacent battery cell can be more firmly sucked and fixed on the first end of the first side supporting platform and the second end of the second side supporting platform, ultimately ensuring that the first side welding strip and the second side welding strip can smoothly move along with the first side adjacent battery cell and the second side adjacent battery cell away from the defective battery cell and be separated from the defective battery cell.

[0021] 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.

[0022] Before the first side loading platform and the second side loading platform move away from the middle loading 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 loading platform and the second side loading platform respectively. The adsorbent is integrated and installed onto the heating mechanism, so that the adsorbent and the pressing tooling can move with the heating mechanism, thereby reducing the equipment cost; and the adsorbent is arranged on an independent moving part, which improves the independence and flexibility of the movement of the adsorbent.

[0023] In some embodiments, a solder strip guide groove for guiding the first side solder strip and the second side solder strip is provided on the middle supporting platform, and the solder strip guide groove extends along the length direction of the rework station, and each solder strip guide groove is used to guide a first side solder strip or a second side solder strip.

[0024] By arranging the soldering tape guide groove on the middle supporting platform, the avoidance and guidance of the first side soldering tape and the second side soldering tape on the defective battery cell are achieved. On the one hand, it can prevent the first side soldering tape and the second side soldering tape 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 soldering tape and the second side soldering tape after desoldering with the defective battery cell can move smoothly relative to the defective battery cell. On the other hand, the first side soldering tape and the second side soldering tape can be guided and limited during their movement.

[0025] In some embodiments, a mounting groove extending along the width direction of the rework station is also provided on the intermediate carrier platform; the defective battery cell removal mechanism also includes a first movable plate, a second movable plate and an opening and closing drive unit, wherein the first movable plate and the second movable plate are arranged in the mounting groove, a plurality of first guide blocks are arranged on the first movable plate, and a plurality of second guide blocks corresponding to the first guide blocks are arranged on the second movable plate, and a solder strip guide groove is formed between each first guide block and the corresponding second guide block; the opening and closing drive unit is arranged at both ends of the intermediate carrier platform, and the opening and closing drive unit is used to drive the first movable plate and the second movable plate to move in opposite directions in the mounting groove, so as to drive each first guide block to approach or open the corresponding second guide block, and when the first guide block approaches the corresponding second guide block, the corresponding first side solder strip or the second side solder strip is guided.

[0026] The first movable plate and the second movable plate are driven to move closer by the opening and closing driving part, so as to achieve the limiting guidance of the first side welding strip and the second side welding strip, so that the first side welding strip and the second side welding strip are always kept in the welding strip guiding groove during the movement relative to the defective battery cell.

[0027] In some embodiments, a first suction cup or a first adsorption hole is provided on the middle supporting platform, and the first suction cup or the first adsorption hole is used to adsorb defective battery cells, and the defective battery cells press the film strips bonded to the edges of the defective battery cells onto the middle supporting platform; a second suction cup or a second adsorption hole is provided on the first end of the first side supporting platform, and the second suction cup or the second adsorption hole is used to adsorb the battery cells adjacent to the first side; a third suction cup or a third adsorption hole is provided on the second end of the second side supporting platform, and the third suction cup or the third adsorption hole is used to adsorb the battery cells adjacent to the second side.

[0028] By setting a first suction cup or a first adsorption hole on the middle supporting platform, the defective battery cell can be adsorbed and fixed on the middle supporting platform. By setting a second suction cup or a second adsorption hole on the first end of the first side supporting platform, the first side adjacent battery cell is adsorbed and fixed on the first end of the first side supporting platform. By setting a third suction cup or a third adsorption hole on the second end of the second side supporting platform, the second side adjacent battery cell is adsorbed and fixed on the second end of the second side supporting platform. In this way, when the first end of the first side supporting platform and the second end of the second side supporting platform rotate upward, the first side film strip and the second side film strip softened by heat can smoothly detach from the first side adjacent battery cell and the second side adjacent battery cell.

[0029] 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.

[0030] The heating component cooperates with the heating mechanism 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.

[0031] In some embodiments, the first side supporting platform includes a first side mounting platform and a first side rotating platform, wherein the first side rotating platform is located between the first side mounting platform and the middle supporting platform, the first side rotating platform is used to carry and adsorb the adjacent battery cells on the first side, the first side mounting platform is used to carry the remaining battery cells on the first side of the defective battery cell, and the first side rotating platform is configured to be able to rotate vertically; the second side supporting platform includes a second side mounting platform and a second side rotating platform, wherein the second side rotating platform is located between the second side mounting platform and the middle supporting platform, the second side rotating platform is used to carry and adsorb the adjacent battery cells on the second side, the second side mounting platform is used to carry the remaining battery cells on the second side of the defective battery cell, and the second side rotating platform is configured to be able to rotate vertically.

[0032] By configuring the first side bearing platform to include a first side mounting platform and a first side rotating platform, the first side film strip can be separated from the first side adjacent battery sheet by only controlling the first side rotating platform to rotate upward relative to the middle bearing platform. Similarly, by configuring the second side bearing platform to include a second side mounting platform and a second side rotating platform, the second side film strip can be separated from the second side adjacent battery sheet by only controlling the second side rotating platform to rotate upward.

[0033] In some embodiments, the first side rotating table is hinged at the first end of the first side mounting table, and the second side rotating table is hinged at the second end of the second side mounting table; the defective battery cell rejection mechanism also includes a first rotating mechanism and a second rotating mechanism, wherein: the first rotating mechanism is transmission-connected to the first side rotating table, and the first rotating mechanism is used to drive the first side rotating table to rotate vertically relative to the first side mounting table; the second rotating mechanism is transmission-connected to the second side rotating table, and the second rotating mechanism is used to drive the second side rotating table to rotate vertically relative to the second side mounting table.

[0034] By hingedly connecting the first side rotating platform to the first side mounting platform and drivingly connecting it to the first rotating mechanism, the first side rotating platform is rotated and integrated with the first side mounting platform. Similarly, by hingedly connecting the second side rotating platform to the second side mounting platform and drivingly connecting it to the second rotating mechanism, the second side rotating platform is rotated and integrated with the second side mounting platform.

[0035] In some embodiments, the second rotating mechanism has the same structure as the first rotating mechanism, and the first rotating mechanism includes a first rotating drive unit, a guide seat and a lifting seat, wherein: the first rotating drive unit is installed at the bottom of the first side mounting platform, the guide seat is transmission-connected to the first rotating drive unit and is close to the intermediate bearing platform, the first rotating drive unit is used to drive the guide seat to translate toward or away from the intermediate bearing platform, and a vertical guide groove extending in the vertical direction is provided on the guide seat; the upper end of the lifting seat is fixedly connected to the bottom of the first side rotating platform, and a first follower is provided at the lower end of the lifting seat, the first follower is located in the vertical guide groove and can slide along the vertical guide groove; when the first rotating drive unit drives the guide seat to translate toward the intermediate bearing platform, the first follower slides upward along the vertical guide groove, and the lifting seat lifts the first side rotating platform upward, so that the first side rotating platform rotates upward; when the first rotating drive unit drives the guide seat to translate away from the intermediate bearing platform, the first follower slides downward along the vertical guide groove, and the first side rotating platform rotates downward and resets.

[0036] A first rotating mechanism with a simple structure and stable driving is provided, which drives the first side rotating platform to rotate by lifting the first side rotating platform upward.

[0037] In some embodiments, the first rotation driving part includes a support plate, a driving motor, a driving block and a moving plate, wherein: the upper end of the support plate is fixedly connected to the bottom of the first side load-bearing mounting platform, a waist hole is provided on the support plate, and the waist hole extends along the width direction of the rework platform; the moving plate is slidably connected to the lower end of the support plate along the length direction of the rework platform, the driving motor is fixedly mounted on the moving plate, the driving block is fixedly connected to the driving end of the driving motor, a second follower is provided on the driving block, the second follower is located in the waist hole and can move in the waist hole, and the guide seat is fixedly mounted on the moving plate; when the driving motor drives the driving block to rotate, the second follower moves in the waist hole, thereby driving the guide seat to translate toward or away from the middle load-bearing platform.

[0038] By setting the first rotation driving part, the first rotation driving part can drive the guide seat to translate toward or away from the middle bearing platform, and finally the lifting seat lifts the first side rotating platform upward.

[0039] In some embodiments, the defective battery cell removal mechanism also includes a first translation mechanism and a second translation mechanism, wherein: the first translation mechanism is transmission-connected to the first side mounting platform and the first side rotating platform, and the first translation mechanism is used to drive the first side mounting platform and the first side rotating platform to translate toward or away from the intermediate supporting platform; the second translation mechanism is transmission-connected to the second side mounting platform and the second side rotating platform, and the second translation mechanism is used to drive the second side mounting platform and the second side rotating platform to translate toward or away from the intermediate supporting platform.

[0040] By setting up a first translation mechanism, the translation drive of the first side mounting table and the first side rotating table is realized, so that the first side mounting table and the first side rotating table can be synchronously translated toward or away from the intermediate supporting platform; similarly, by setting up a second translation mechanism, the translation drive of the second side mounting table and the second side rotating table is realized, so that the second side mounting table and the second side rotating table can be synchronously translated toward or away from the intermediate supporting platform.

[0041] In some embodiments, the defective battery cell rejection mechanism includes a third rotating mechanism and a fourth rotating mechanism, wherein: the third rotating mechanism is transmission-connected to the first side support platform, and the third rotating mechanism is used to drive the first side support platform to rotate vertically; the fourth rotating mechanism is transmission-connected to the second side support platform, and the fourth rotating mechanism is used to drive the second side support platform to rotate vertically.

[0042] When the third rotating mechanism drives the first side supporting platform to rotate vertically, all the battery cells located on the first side of the defective battery cell, including the battery cells adjacent to the first side, rotate relative to the defective battery cell, so that the first side film strip is separated from the battery cells adjacent to the first side; similarly, when the fourth rotating mechanism drives the second side supporting platform to rotate vertically, all the battery cells located on the second side of the defective battery cell, including the battery cells adjacent to the second side, rotate relative to the defective battery cell, so that the second side film strip is separated from the battery cells adjacent to the second side.

[0043] In some embodiments, the fourth rotating mechanism has the same structure as the third rotating mechanism, and the third rotating mechanism includes a base and a second rotating driving unit, wherein: the first side supporting platform is hinged on the base; the second rotating driving unit is installed on the base, and the driving end of the second rotating driving unit is connected to the first side supporting platform, and the second rotating driving unit drives the second side supporting platform to rotate vertically relative to the base.

[0044] A third rotating mechanism with simple structure and stable driving is provided, which can drive the first side bearing platform to rotate vertically relative to the base.

[0045] In some embodiments, the defective battery cell rejection mechanism also includes a third translation mechanism and a fourth translation mechanism, wherein: the third translation mechanism is transmission connected to the base of the third rotation mechanism, and the third translation mechanism is used to drive the first side load platform to translate toward or away from the middle load platform; the fourth translation mechanism is transmission connected to the base of the fourth rotation mechanism, and the fourth translation mechanism is used to drive the second side load platform to translate toward or away from the middle load platform.

[0046] By setting up the third translation mechanism, the translation drive of the first side load platform is realized, so that the first side load platform can be translated toward or away from the middle load platform; similarly, by setting up the fourth translation mechanism, the translation drive of the second side load platform is realized, so that the second side load platform can be translated toward or away from the middle load platform.

[0047] In some embodiments, the rework station also includes a first solder strip clamping mechanism and a second solder strip clamping mechanism, wherein: the first solder strip clamping mechanism is installed on the first side support platform and is close to the middle support platform, and when the defective battery cell is a battery cell located at the first end of the battery string, the first solder strip clamping mechanism is used to clamp and fix the first side solder strip on the back side of the defective battery cell; the second solder strip clamping mechanism is installed on the second side support platform and is close to the middle support platform, and when the defective battery cell is a battery cell located at the second end of the battery string, the second solder strip clamping mechanism is used to clamp and fix the second side solder strip on the back side of the defective battery cell.

[0048] By providing a first solder strip clamping mechanism, when the defective cell is located at the first end of the cell string, the first solder strip clamping mechanism clamps and fixes the end of the first side solder strip extending from the defective cell, ensuring that when the first side platform moves away from the middle platform, the first side solder strip is separated from the solder joint of the defective cell. Similarly, by providing a second solder strip clamping mechanism, when the defective cell is located at the second end of the cell string, the second side solder strip clamping mechanism clamps and fixes the end of the second side solder strip extending from the defective cell, ensuring that when the second side platform moves away from the middle platform, the second side solder strip is separated from the solder joint of the defective cell.

[0049] In some embodiments, the second solder strip clamping mechanism has the same structure as the first solder strip clamping mechanism, and the first solder strip clamping mechanism includes a clamping drive unit and a plurality of clamps, wherein: the plurality of clamps are hinged side by side at the bottom of the first side support platform along the width direction of the rework platform, and a clamping opening opening toward the middle support platform is formed between the upper end of each clamp and the first side support platform, and each clamping opening corresponds to clamping a first side solder strip on a defective battery cell; the clamping drive unit is arranged at the bottom of the first side support platform, and the clamping drive unit is configured to synchronously drive the plurality of clamps to rotate relative to the first side support platform, so as to drive each clamp to clamp or release the first side solder strip located in the corresponding clamping opening.

[0050] A welding strip clamping mechanism with a simple structure is provided, which drives a plurality of clamps to clamp or open synchronously through a clamping driving part, so as to clamp or release a first-side welding strip or a second-side welding strip.

[0051] In some embodiments, the first side load platform and the second side load platform can both be raised and lowered relative to the middle load platform; when the first side load platform rises relative to the middle load platform, it drives the first solder strip clamping mechanism to rise synchronously, so that the clamping mouth of the first solder strip clamping mechanism is aligned with the first side solder strip on the defective battery cell; when the second side load platform rises relative to the middle load platform, it drives the second solder strip clamping mechanism to rise synchronously, so that the clamping mouth of the second solder strip clamping mechanism is aligned with the second side solder strip on the defective battery cell.

[0052] The first side support platform and the second side support platform are arranged to be able to be raised and lowered relative to the middle support platform, ensuring that the clamping opening of the first solder strip clamping mechanism and the clamping opening of the second solder strip clamping mechanism are respectively aligned with the first side solder strip and the second side solder strip, so as to clamp the first side solder strip and the second side solder strip.

[0053] The second aspect of the present application provides a rework device, comprising the defective battery cell removal mechanism described in any one of the above items; after the defective battery cell removal mechanism removes the defective battery cell from the intermediate carrier platform, the transport mechanism is also used to transport the replacement battery cell with its back side facing downward to the intermediate carrier platform, and the back side of the replacement battery cell is adhered with a first side replacement film strip and a second side replacement film strip; the first side carrier platform is also configured to move back toward the intermediate carrier platform so that the first side replacement film strip is inserted into the first gap between the first side adjacent battery cell and the first side welding strip; the first end portion of the first side carrier platform is also configured to rotate downward and reset so that the first side replacement film strip and the first side welding strip are aligned with each other. side adjacent battery cell; the second side carrier is also configured to move back to its position toward the middle carrier, so that the second side replacement film strip is inserted into the second gap between the second side adjacent battery cell and the second side welding strip; the second end of the second side carrier is also configured to rotate downward and reset, so that the second side replacement film strip is in contact with 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 is welded to the back side of the replacement battery cell, the second side welding strip is 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.

[0054] 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.

[0055] In some embodiments, a lifting hole that passes through the middle supporting platform is provided below each solder strip guide groove; the defective battery cell rejection mechanism also includes a solder strip lifting assembly, the solder strip lifting assembly includes a 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 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 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 solder strip guide groove, so as to press the first side solder strip or the second side solder strip located in the solder strip guide groove against the back of the replacement battery cell.

[0056] 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.

[0057] In some embodiments, the rework device further includes a replacement cell supply mechanism, which is used at least to adhere the first side replacement film strip and the second side replacement film strip to the back side of the cell to obtain a replacement cell.

[0058] 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

[0059] Figure 1 It is a structural schematic diagram of a defective battery cell rejection mechanism in an embodiment of the present application;

[0060] Figure 2 This is a schematic diagram of the structure of the rework station in the embodiment of the present application;

[0061] Figure 3 It is a schematic diagram of the side structure of the first side bearing platform in a working state in the embodiment of the present application;

[0062] Figure 4 It is a schematic diagram of the side structure of the first side bearing platform in another working state in the embodiment of the present application;

[0063] Figure 5 for Figure 3 AA section view;

[0064] Figure 6 It is a schematic diagram of a top view of the structure of the first side bearing platform in a working state in an embodiment of the present application;

[0065] Figure 7 for Figure 6 BB cross-sectional view;

[0066] Figure 8 This is a schematic diagram of the structure of the heating mechanism, the intermediate pressing assembly and other components in the embodiment of the present application;

[0067] Fig. 9 It is a schematic diagram of the side structure of the intermediate loading platform in the embodiment of the present application;

[0068] Fig.10 Schematic diagram of the top view of the intermediate supporting platform in the embodiment of the present application;

[0069] Fig.11 It is a schematic diagram of the three-dimensional structure of the intermediate supporting platform in the embodiment of the present application;

[0070] Fig.12 for Fig.11 A partial enlarged view of the middle C area;

[0071] Fig.13 It is a schematic diagram of a state where a portion of a battery string to be repaired is carried on a repair table in an embodiment of the present application;

[0072] Fig.14 It is a structural schematic diagram of a rework station in another embodiment of the present application.

[0073] Figures 1 to 14 Included:

[0074] First side bearing platform 1: first side mounting platform 11, first side rotating platform 12, first articulated frame 13;

[0075] Intermediate loading platform 2: mounting groove 21, first movable plate 22, second movable plate 23, opening and closing driving part 24, first guide block 25, second guide block 26, welding strip guide groove 27, first suction cup 28, lifting hole 29;

[0076] Second side bearing platform 3: second side mounting platform 31, second side rotating platform 32;

[0077] Heating mechanism 4;

[0078] Middle pressing component 5;

[0079] A first side pressing component 6;

[0080] A second side pressing component 7;

[0081] The first rotating mechanism 8 includes a first rotating driving part 81, a guide seat 82, a lifting seat 83, a vertical guide groove 84, a first follower 85, a support plate 811, a driving motor 812, a driving block 813, a moving plate 814, a waist hole 815, and a second follower 816;

[0082] The second rotating mechanism 9;

[0083] A first translation mechanism 10;

[0084] A second translation mechanism 110;

[0085] The third rotating mechanism 120 includes a base 121 , a second rotating driving unit 122 , and a second articulated frame 123 ;

[0086] Fourth rotating mechanism 130;

[0087] A third translation mechanism 140;

[0088] A fourth translation mechanism 150;

[0089] The first welding ribbon clamping mechanism 170 includes a clamping driving part 171 , a clamping head 172 , and a clamping opening 173 ;

[0090] A second welding ribbon clamping mechanism 180;

[0091] Welding strip lifting assembly 190: lifting drive unit 191, ejector mounting plate 192;

[0092] Defective battery cell 201 , first side film strip 202 , second side film strip 203 , first side welding strip 204 , second side welding strip 205 , first side adjacent battery cell 206 , second side adjacent battery cell 207 . DETAILED DESCRIPTION

[0093] 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.

[0094] The commonly used battery string repair machine is mainly used for replacing and repairing battery strings without membrane strips. This kind of repair machine cannot 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.

[0095] 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.

[0096] like Figure 1 , Figure 2 and Fig.13 As shown, the defective battery cell removal mechanism in the embodiment of the present application includes a rework station, a heating mechanism 4 and a transport mechanism (not shown in the figure).

[0097] The rework station includes a Figure 1 and Figure 2 A first side loading platform 1, a middle loading platform 2 and a second side loading platform 3 are arranged in the X-axis direction (shown in FIG. 1 ).

[0098] The middle carrier 2 is used to carry and absorb the defective battery cell 201 in the battery string and the film strips bonded to the edges of both sides of the defective battery cell. The first side carrier 1 is located on the first side (e.g., the left side) of the middle carrier 2, and the first side carrier 1 is used to carry the battery cell located on the first side of the defective battery cell, wherein the first end of the first side carrier 1 is configured to absorb the first side adjacent battery cell 206 adjacent to the defective battery cell 201. The second side carrier 3 is located on the second side (e.g., the right side) of the middle carrier 2, and the second side carrier 3 is used to carry the battery cell located on the second side of the defective battery cell 201, wherein the second end of the second side carrier 3 is configured to absorb the second side adjacent battery cell 207 adjacent to the defective battery cell 201. The battery string is placed on the rework station with its back side facing down.

[0099] The heating mechanism 4 is configured to be able to move above the intermediate supporting platform 2, and the heating mechanism 4 is used to heat the defective battery cell 201 so that the first side solder strip 204 and the second side solder strip 205 on the back side of the defective battery cell 201 are desoldered from the defective battery cell 201, and the film strips on the two side edges of the defective battery cell 201 are softened.

[0100] The first end of the first side loading platform 1 is configured to be able to rotate upwards, so that the first side film strip 202 softened by heat is separated from the first side adjacent battery cell 206, and a first gap is generated between the first side adjacent battery cell 206 and the first side welding strip 204. The first side loading platform 1 is also configured to be able to move away from the middle loading platform 2, so that the first side film strip 202 is separated from the first side adjacent battery cell 206, and the first side film strip 202 is a film strip bonded between the defective battery cell 201 and the first side adjacent battery cell 206.

[0101] The second end of the second side loading platform 3 is configured to be able to rotate upwards, so that the second side film strip 203 softened by heat is separated from the second side adjacent battery cell 207, and a second gap is generated between the second side adjacent battery cell 207 and the second side welding strip 205. The second side loading platform 3 is also configured to be able to move away from the middle loading platform 2, so that the second side film strip 203 is separated from the second side adjacent battery cell 207, and the second side film strip 203 is a film strip bonded between the defective battery cell 201 and the second side adjacent battery cell 207.

[0102] The transport mechanism is used to remove the defective battery cell 201 with the film strip from the intermediate carrier 2 .

[0103] If explanation is needed here, Fig.13 Only the first end of the first side loading platform 1 and the second end of the second side loading platform 3 are shown.

[0104] 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 Figure 1 , Figure 2 and Fig.13 , taking the case where the defective battery cell is located in the middle of the battery string as an example, the optional working process of the defective battery cell removal mechanism in the embodiment of the present application is exemplarily described.

[0105] 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 on the same horizontal plane. The heating mechanism 4 is in a evacuation position away from the rework station.

[0106] The battery string to be repaired is placed with its back side facing downward on the repair platform, wherein the defective battery cell 201 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 201 in the battery string are located on the first side carrier 1, wherein the first side adjacent battery cell 206 is fixed by the first end of the first side carrier 1. All battery cells on the second side of the defective battery cell 201 in the battery string are located on the second side carrier 3, wherein the second side adjacent battery cell 207 is fixed by the second end of the second side carrier 2.

[0107] Next, the heating mechanism 4 is controlled to move above the middle supporting platform 2, and the heating mechanism 4 heats the defective battery cell 201 so that the first side solder strip 204 and the second side solder strip 205 on the back side of the defective battery cell 201 are desoldered from the defective battery cell 201, and the film strips on the edges of both sides of the defective battery cell 201 are softened.

[0108] Next, the first end of the first side loading platform 1 is controlled to rotate upward, so that the first side film strip 202 softened by heat is separated from the first side adjacent battery cell 206, and a first gap is generated between the first side adjacent battery cell 206 and the first side welding strip 204. The second end of the second side loading platform 3 is controlled to rotate upward, so that the second side film strip 203 softened by heat is separated from the second side adjacent battery cell 207, and a second gap is generated between the second side adjacent battery cell 207 and the second side welding strip 205. The first end of the first side loading platform 1 and the second end of the second side loading platform 3 can be rotated upward synchronously, or one of them can be rotated upward before the other.

[0109] Next, the first side platform 1 is controlled to move away from the middle platform 2 so that the first side film strip 202 is separated from the first side adjacent battery cell 206; the second side platform 3 is controlled to move away from the middle platform 2 so that the second side film strip 203 is separated from the second side adjacent battery cell 207. 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 a large part of the first side welding strip and the second side welding strip still remains 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. The first side platform 1 and the second side platform 3 can be moved away from the middle platform 2 synchronously, or one of them can be moved away from the middle platform 2 before the other.

[0110] Finally, the defective battery cell 201 with the first side film strip 202 and the second side film strip 203 is removed from the middle carrying platform 2 by the transport mechanism.

[0111] It can be seen that through the cooperation of the rework station, the heating 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 of both sides of the defective battery from the IBC battery string at the same time, thereby improving the removal efficiency of the defective battery cells.

[0112] like Figure 8 As shown, optionally, an intermediate pressing component 5 is provided at the bottom of the heating mechanism 4, and the intermediate pressing component 5 is used to press downward against the defective battery cell.

[0113] After the intermediate pressing component 5 moves with the heating mechanism 4 to the top of the defective battery cell 201, the intermediate pressing component 5 presses downward against the defective battery cell 201, thereby flattening the defective battery cell 201 downward, thereby ensuring that the defective battery cell 201 can be tightly attached to and fixed by the intermediate supporting platform 201, and the first side film strip 202 and the second side film strip 203 are pressed between the defective battery cell 201 and the intermediate supporting platform 2, ultimately ensuring that when the first end of the first side supporting platform 1 and the second end of the second side supporting platform 3 rotate upward, the first side film strip 202 and the second side film strip 202 softened by heat can smoothly detach from the first side adjacent battery cell 206 and the second side adjacent battery cell 207, and the first side film strip 202 and the second side film strip 203 will not detach from the defective battery cell.

[0114] Optionally, the middle pressing assembly 5 includes at least two rows of pressing needles arranged at intervals along the length direction of the rework table, and each row of pressing needles includes a plurality of rows of pressing needles arranged along the width direction of the rework table (such as Figure 1 , Figure 2At least two rows of press pins arranged at intervals along the length direction of the rework station press the defective cell 201 from different positions, thereby ensuring that the defective cell 201 can be flattened on the middle carrier 2 and preventing the defective cell 201 from being damaged due to uneven pressure. Optionally, the two rows of press pins located on both sides press the first side film strip 202 and the second side film strip 203 onto the middle carrier 2 respectively.

[0115] Optionally, the defective battery cell removal mechanism in the embodiment of the present application also includes a first side pressing component 6 and a second side pressing component 7, wherein: the first side pressing component 6 is used to press downward against the first side adjacent battery cell 206, and the second side pressing component 7 is used to press downward against the second side adjacent battery cell 207.

[0116] Before controlling the first end of the first side support platform 1 and the second end of the second side support platform 3 to flip upward, the first side pressing component 6 and the second side pressing component 7 can be controlled to press against the first side adjacent battery cell 206 and the second side adjacent battery cell 207 respectively, so that the first side adjacent battery cell 206 and the second side adjacent battery cell 207 are more firmly sucked and fixed on the first end of the first side support platform 1 and the second end of the second side support platform 3, and finally ensure that the first side welding strip 204 and the second side welding strip 205 move smoothly with the first side adjacent battery cell 206 and the second side adjacent battery cell 207 away from the defective battery cell 201 and are separated from the defective battery cell 201.

[0117] Optionally, the second side pressing component 7 has the same structure as the first side pressing component 6. Taking the first side pressing component 6 as an example, it includes an adsorbent and a pressing tool, wherein the adsorbent is connected to the heating mechanism 4, the heating mechanism 4 is used to drive the adsorbent to translate and lift, and the pressing tool is adsorbed on the adsorbent.

[0118] When the heating mechanism 4 moves to the top of the defective cell 201 to perform heating, the first side pressing assembly 6 and the second side pressing assembly 7 are driven by the heating mechanism 4 to move to the top of the first side adjacent cell 206 and the second side adjacent cell 207 respectively.

[0119] Before controlling the first end of the first side platform 1 and the second end of the second side platform 3 to flip upward, the adsorbent of the first side pressing component 6 releases the pressing tooling adsorbed thereon, so that the pressing tooling falls onto the first side adjacent battery slice 206, thereby pressing and fixing the first side adjacent battery slice 206 to the first end of the first side platform 1. Similarly, the adsorbent of the second side pressing component 7 releases the pressing tooling adsorbed thereon, so that the pressing tooling falls onto the second side adjacent battery slice 207, thereby pressing and fixing the second side adjacent battery slice 207 to the second end of the second side platform 3.

[0120] The adsorption parts of the first side pressing component 6 and the second side pressing component 7 are integrated and installed into the heating mechanism 4, so that the adsorption parts of the first side pressing component 6 and the second side pressing component 7 can move with the heating mechanism 4, and there is no need to set a moving part for the adsorption parts of the first side pressing component 6 and the second side pressing component 7, thereby reducing the equipment cost.

[0121] Of course, in order to improve the independence and flexibility of the first side pressing component 6 and the second side pressing component 7, a moving part can also be provided for the adsorption parts of the first side pressing component 6 and the second side pressing component 7. Still taking the first side pressing component 6 as an example, it includes a moving part, an adsorption part and a pressing tool, wherein the moving part is provided 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.

[0122] 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. For example, a cylinder drive module composed of a cylinder and a slide rail pair. The adsorption part can be, for example, an electromagnet adsorption part. The pressing tooling is, for example, a steel plate tooling on which a plurality of pressing pins are arranged.

[0123] like Figures 9 to 12 As shown, optionally, a solder strip guide groove 27 for guiding the first side solder strip and the second side solder strip is provided on the intermediate supporting platform 2, and the solder strip guide groove 27 extends along the length direction of the rework platform, and each solder strip guide groove 27 is used to guide a first side solder strip or a second side solder strip.

[0124] By arranging the soldering strip guide groove 27 on the intermediate supporting platform 2, the avoidance and guidance of the first side soldering strip and the second side soldering strip on the defective battery cell are achieved. On the one hand, it can prevent the first side soldering strip and the second side soldering 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 soldering strip and the second side soldering strip after desoldering with the defective battery cell can move smoothly relative to the defective battery cell. On the other hand, the first side soldering strip and the second side soldering strip can be guided and limited during their movement.

[0125] Optionally, the intermediate carrier 2 is also provided with a mounting groove 21 extending along the width direction of the rework station. The defective cell removal mechanism in the embodiment of the present application further includes a first movable plate 22, a second movable plate 23 and an opening and closing driving unit 24, wherein the first movable plate 22 and the second movable plate 23 are arranged in the mounting groove, a plurality of first guide blocks 25 are arranged on the first movable plate 22, and a plurality of second guide blocks 26 corresponding to the first guide blocks 25 are arranged on the second movable plate 23, and a welding strip guide groove 27 is formed between each first guide block 25 and the corresponding second guide block 26. The opening and closing driving unit 24 is arranged at both ends of the intermediate carrier 2, and the opening and closing driving unit 24 is used to drive the first movable plate 22 and the second movable plate 23 to move in opposite directions in the mounting groove 21, so as to drive each first guide block 25 to approach or open the corresponding second guide block 26, and guide the corresponding first side welding strip or second side welding strip when the first guide block 25 and the corresponding second guide block 26 approach.

[0126] The first movable plate 22 and the second movable plate 23 are driven together by the opening and closing driving part 24, so that the first guide block 25 on the first movable plate 22 and the second guide block 26 on the second movable plate 23 can realize the limiting guidance of the first side welding strip and the second side welding strip, so that the first side welding strip and the second side welding strip are always kept in the welding strip guiding groove 207 during the movement relative to the defective battery cell.

[0127] Optionally, the opening and closing driving unit 24 includes driving cylinders arranged in pairs on both sides of the middle bearing platform 2, one of which is drivingly connected to the first movable plate 22, and the other is drivingly connected to the second movable plate 23. The two driving cylinders cooperate to drive the first movable plate 22 and the second movable plate 23 to move in opposite directions.

[0128] Optionally, a first suction cup 28 is provided on the intermediate carrier 2, and the first suction cup 28 is used to absorb the defective battery cell, so that the defective battery cell presses the film strip bonded to the edge of the defective battery cell onto the intermediate carrier 2. Of course, a first suction hole can also be provided on the intermediate carrier 2, and the first suction hole absorbs the defective battery cell, so that the defective battery cell presses the film strip bonded to the edge of the defective battery cell onto the intermediate carrier 2.

[0129] Optionally, a second suction cup or a second adsorption hole is provided on the first end of the first side support platform 1, and the second suction cup or the second adsorption hole is used to adsorb the adjacent battery cell on the first side. A third suction cup or a third adsorption hole is provided on the second end of the second side support platform 3, and the third suction cup or the third adsorption hole is used to adsorb the adjacent battery cell on the second side. In this way, when the first end of the first side support platform 1 and the second end of the second side support platform 2 rotate upward, it is ensured that the first side film strip and the second side film strip softened by heat can be smoothly separated from the adjacent battery cell on the first side and the adjacent battery cell on the second side. When the first side support platform 1 and the second side support platform 2 are translated away from the middle support platform 2, it is ensured that the first side film strip and the second side film strip are separated from the adjacent battery cell on the first side and the adjacent battery cell on the second side, and the first side welding strip and the second side welding strip are separated from the welding point of the defective battery cell.

[0130] Optionally, a heating component is provided in the middle support platform 2, and the heating component is used to cooperate with the heating mechanism 4 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 welding strip, the second side welding strip and the defective battery cell. The heating component can be a heating rod, a heating wire, a thermocouple, etc.

[0131] Figure 1 to Figure 2 In the illustrated embodiment, the first side support platform 1 is configured as a split structure, which includes a first side mounting platform 11 and a first side rotating platform 12, wherein the first side rotating platform 12 is located between the first side mounting platform 11 and the middle support platform 2, the first side rotating platform 12 is used to carry and adsorb the first side adjacent battery cells, the first side mounting platform 11 is used to carry the remaining battery cells located on the first side of the defective battery cell, and the first side rotating platform 12 is configured to be able to rotate vertically. That is, the first side rotating platform 12 is equivalent to the first end portion of the first side support platform 1 that can rotate vertically, and the first side mounting platform 11 is equivalent to the remaining portion of the first side support platform 1 that cannot rotate vertically. After completing the heating of the defective battery cell, the heating mechanism 4 only controls the first side rotating platform 12 to rotate vertically, which can drive the first side adjacent battery cell to rotate upward relative to the defective battery cell, so that the first side film strip is separated from the first side adjacent battery cell.

[0132] Similarly, the second side support platform 3 is also configured as a split structure, which includes a second side mounting platform 31 and a second side rotating platform 32, wherein the second side rotating platform 32 is located between the second side mounting platform 31 and the middle support platform 2, the second side rotating platform 32 is used to carry and adsorb the second side adjacent battery cells, the second side mounting platform 31 is used to carry the remaining battery cells located on the second side of the defective battery cell, and the second side rotating platform 32 is configured to be able to rotate vertically. That is, the second side rotating platform 32 is equivalent to the second end portion of the second side support platform 3 that can rotate vertically, and the second side mounting platform 31 is equivalent to the remaining portion of the second side support platform 2 that cannot rotate vertically. After completing the heating of the defective battery cell, the heating mechanism 4 only controls the second side rotating platform 32 to rotate vertically, which can drive the second side adjacent battery cell to rotate upward relative to the defective battery cell, so that the second side film strip is separated from the second side adjacent battery cell.

[0133] Optionally, the defective cell rejection mechanism in the embodiment of the present application further includes a first translation mechanism 10 and a second translation mechanism 110, wherein: the first translation mechanism 10 is in transmission connection with the first side mounting platform 11 and the first side rotating platform 12, and the first translation mechanism 10 is used to drive the first side mounting platform 11 and the first side rotating platform 12 to translate toward or away from the intermediate loading platform 2. The second translation mechanism 110 is in transmission connection with the second side mounting platform 31 and the second side rotating platform 32, and the second translation mechanism 110 is used to drive the second side mounting platform 31 and the second side rotating platform 32 to translate toward or away from the intermediate loading platform 2.

[0134] Both the first translation mechanism 10 and the second translation mechanism 110 can adopt various types of existing translation drive devices, such as a screw drive module, a cylinder drive module, etc.

[0135] Optionally, the first side rotating platform 12 is hinged to the first end of the first side mounting platform 11, and the second side rotating platform 32 is hinged to the second end of the second side mounting platform 31. For example, the first side rotating platform 12 and the second side rotating platform 32 are hinged to the first end of the first side mounting platform 11 and the second end of the second side mounting platform 31 via the first articulated frame 13, respectively. The defective battery cell rejection mechanism in the embodiment of the present application also includes a first rotating mechanism 8 and a second rotating mechanism 9, wherein: the first rotating mechanism 8 is transmission-connected to the first side rotating platform 12, and the first rotating mechanism 8 is used to drive the first side rotating platform 12 to rotate vertically relative to the first side mounting platform 11. The second rotating mechanism 9 is transmission-connected to the second side rotating platform 32, and the second rotating mechanism 9 is used to drive the second side rotating platform 32 to rotate vertically relative to the second side mounting platform 31.

[0136] Since the first side rotating platform 12 is hinged on the first side mounting platform 11, the first translation mechanism 10 only needs to drive the first side mounting platform 11 to move away from or toward the middle loading platform 2 to drive the first side rotating platform 12 to move synchronously, so that the first side film strip 202 is separated from the first side adjacent battery slice 206. Similarly, since the second side rotating platform 32 is hinged on the second side mounting platform 31, the second translation mechanism 110 only needs to drive the second side mounting platform 31 to move away from or toward the middle loading platform 2 to drive the second side rotating platform 32 to move synchronously, so that the second side film strip 203 is separated from the second side adjacent battery slice 207.

[0137] Of course, the first side rotating platform 12 can also be separately provided from the first side mounting platform 11. In this case, the first translation mechanism 10 needs to be simultaneously connected to the first side rotating platform 12 and the first side mounting platform 11 to drive the first side rotating platform 12 and the first side mounting platform 11 to synchronously move away from or toward the middle bearing platform 2. Similarly, the second side rotating platform 32 can also be separately provided from the second side mounting platform 31. In this case, the second translation mechanism 110 needs to be simultaneously connected to the second side rotating platform 32 and the second side mounting platform 31 to drive the second side rotating platform 32 and the second side mounting platform 31 to synchronously move away from or toward the middle bearing platform 2.

[0138] Optionally, the second rotating mechanism 9 has the same structure as the first rotating mechanism 8. Figures 3 to 7 As shown, taking the first rotating mechanism 8 as an example, the first rotating mechanism 8 optionally includes a first rotating driving unit 81, a guide seat 82 and a lifting seat 83, wherein: the first rotating driving unit 81 is installed at the bottom of the first side mounting platform 11 (only a part of the first side mounting platform 11 close to the first side rotating platform 12 is shown in the figure), the guide seat 82 is connected to the first rotating driving unit 81 in a transmission manner and close to the intermediate bearing platform 2, the first rotating driving unit 81 is used to drive the guide seat 82 to translate toward or away from the intermediate bearing platform 2, and a vertical guide groove 84 extending in the vertical direction is provided on the guide seat 82. The upper end of the lifting seat 83 is fixedly connected to the bottom of the first side rotating platform 12, and the lower end of the lifting seat 83 is provided with a first follower 85, which is located in the vertical guide groove 84 and can slide along the vertical guide groove 84. When the first rotation driving unit 81 drives the guide seat 82 to translate toward the middle bearing platform 2, the first follower 85 slides upward along the vertical guide groove 84, and the lifting seat 83 lifts the first side rotating platform 12 upward, so that the first side rotating platform 12 rotates upward. When the first rotation driving unit 81 drives the guide seat 82 to translate away from the middle bearing platform 2, the first follower 85 slides downward along the vertical guide groove 84, and the first side rotating platform 12 rotates downward to reset.

[0139] Optionally, the first rotary drive unit 81 includes a support plate 811, a drive motor 812, a drive block 813 and a moving plate 814, wherein: the upper end of the support plate 811 is fixedly connected to the bottom of the first side mounting platform 11, and a waist hole 815 is provided on the support plate 811, and the waist hole 815 extends along the width direction of the rework platform. The moving plate 814 is slidably connected to the lower end of the support plate 811 along the length direction of the rework platform. The drive motor 812 is fixedly mounted on the moving plate 814, the drive block 813 is fixedly connected to the driving end of the drive motor 812, and a second follower 816 is provided on the drive block 813, and the second follower 816 is located in the waist hole and can move in the waist hole 815, and the guide seat 82 is fixedly mounted on the moving plate 814. When the drive motor 812 drives the drive block 813 to rotate, the second follower 816 moves in the waist hole 815, thereby driving the guide seat 82 to translate toward or away from the intermediate bearing platform 2.

[0140] Of course, the first rotating mechanism 8 and the second rotating mechanism 9 may also adopt existing rotating drive mechanisms of other structures, as long as they can drive the first side rotating platform 12 to rotate vertically relative to the first side mounting platform 11 and the second side rotating platform 32 to rotate vertically relative to the second side mounting platform 31.

[0141] like Fig.14 As shown, in another optional embodiment, the first side loading platform 1 and the second side loading platform 3 are set as an integrated structure. The defective battery cell rejection mechanism of the present application includes a third rotating mechanism 120 and a fourth rotating mechanism 130, wherein: the third rotating mechanism 120 is connected to the first side loading platform 1 by transmission, and the third rotating mechanism 120 is used to drive the first side loading platform 1 to rotate vertically. The fourth rotating mechanism 130 is connected to the second side loading platform 3 by transmission, and the fourth rotating mechanism 130 is used to drive the second side loading platform to rotate vertically.

[0142] When the third rotating mechanism 120 drives the first side carrier 1 to rotate vertically, all cells located on the first side of the defective cell, including the cells adjacent to the first side, rotate relative to the defective cell, so that the first side film strip is separated from the cells adjacent to the first side. Similarly, when the fourth rotating mechanism 130 drives the second side carrier 3 to rotate vertically, all cells located on the second side of the defective cell, including the cells adjacent to the second side, rotate relative to the defective cell, so that the second side film strip is separated from the cells adjacent to the second side.

[0143] Optionally, the fourth rotating mechanism 130 has the same structure as the third rotating mechanism 120. Taking the third rotating mechanism 120 as an example, it includes a base 121 and a second rotating driving unit 122, wherein: the first side bearing platform 1 is hinged on the base 121, the second rotating driving unit 122 is installed on the base 121, the driving end of the second rotating driving unit 122 is connected to the first side bearing platform 1, and the second rotating driving unit 122 drives the second side bearing platform to rotate vertically relative to the base 121.

[0144] Optionally, the first side load platform 1 is hinged to the end of the base 121 away from the middle load platform 2 through the second hinge frame 123. The second rotation drive unit 122 is a lifting cylinder, the cylinder body of the lifting cylinder is fixedly mounted on the end of the base 121 close to the middle load platform 2, and the telescopic rod of the lifting cylinder is connected to the bottom of the first side load platform 1. When the telescopic rod of the lifting cylinder is extended and retracted, the first side load platform 1 is driven to rotate vertically relative to the base 121.

[0145] Continue to refer Fig.14 As shown, optionally, the defective cell rejection mechanism of the present application further includes a third translation mechanism 140 and a fourth translation mechanism 150, wherein: the third translation mechanism 140 is in transmission connection with the base 121 of the third rotation mechanism 120, and the third translation mechanism 140 is used to drive the first side loading platform 1 to translate toward or away from the middle loading platform 2. The fourth translation mechanism 150 is in transmission connection with the base 121 of the fourth rotation mechanism 130, and the fourth translation mechanism 150 is used to drive the second side loading platform 3 to translate toward or away from the middle loading platform 2.

[0146] The third translation mechanism 140 and the fourth translation mechanism 150 can both adopt various types of existing translation drive devices, such as a screw drive module, a cylinder drive module, etc.

[0147] like Figure 2 As shown, optionally, the rework station in the embodiment of the present application also includes a first solder strip clamping mechanism 170 and a second solder strip clamping mechanism 180, wherein the first solder strip clamping mechanism 170 is installed on the first side support platform 1 and is close to the middle support platform 2, and the second solder strip clamping mechanism 180 is installed on the second side support platform 3 and is close to the middle support platform 2.

[0148] When the defective cell is located at the first end of the cell string, only the first group of welding strips exists on the first side of the defective cell. The first welding strip clamping mechanism 170 clamps and fixes the end of the first side welding strip extending from the defective cell, ensuring that when the first side support platform 1 moves away from the middle support platform 2, the first side welding strip is separated from the welding point of the defective cell.

[0149] Similarly, when the defective cell is located at the second end of the cell string, only the second group of welding strips exists on the second side of the defective cell. The second welding strip clamping mechanism 180 clamps and fixes the end of the second side welding strip extending out of the defective cell, ensuring that when the second side support platform 3 moves away from the middle support platform 2, the second side welding strip is separated from the welding point of the defective cell.

[0150] Optionally, the first solder strip clamping mechanism 170 and the second solder strip clamping mechanism 180 have the same structure. Taking the first solder strip clamping mechanism 170 as an example, Figures 3 to 7 As shown, it includes a clamping drive unit 171 and a plurality of clamps 172, wherein: the plurality of clamps 172 are hinged side by side at the bottom of the first side carrier 1 along the width direction of the rework station, and a clamping opening 173 opening toward the middle carrier is formed between the upper end of each clamp 172 and the first side carrier 1, and each clamping opening 173 corresponds to clamping a first side welding strip on a defective battery cell. The clamping drive unit 171 is arranged at the bottom of the first side carrier 1, and the clamping drive unit 171 is configured to synchronously drive the plurality of clamps 172 to rotate relative to the first side carrier 1, so as to drive each clamp 172 to clamp or release the first side welding strip located in the corresponding clamping opening 173.

[0151] Optionally, both the first side platform 1 and the second side platform 3 can be raised and lowered relative to the middle platform 2. When the first side platform 1 rises relative to the middle platform 2, the first solder strip clamping mechanism 170 is driven to rise synchronously, so that the clamping opening 173 of the first solder strip clamping mechanism 170 can be aligned with the first side solder strip on the defective battery cell to clamp the first side solder strip. Similarly, when the second side platform 3 rises relative to the middle platform 2, the second solder strip clamping mechanism 180 is driven to rise synchronously, so that the clamping opening of the second solder strip clamping mechanism 180 is aligned with the second side solder strip on the defective battery cell to clamp the second side solder strip.

[0152] The embodiment of the present application also provides a defective battery cell removal method, which can automatically remove the defective battery cell located in the middle of the IBC battery string and the film strips adhered to the edges of both sides of the defective battery cell from the battery string, thereby improving the defective battery cell removal efficiency.

[0153] The defective battery cell removal method of the embodiment of the present application includes:

[0154] 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 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.

[0155] Step S2, controlling the first side adjacent cell of the defective cell and the second side adjacent cell of the defective cell to rotate upward, so that the first side film strip softened by heat is separated from the first side adjacent cell, the second side film strip softened by heat is separated from the second side adjacent cell, and a first gap is generated between the first side adjacent cell and the first side welding strip, and a second gap is generated between the second side adjacent cell and the second side welding strip.

[0156] 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 adjacent battery cell on the first side; and at the same time 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 adjacent battery cell on the second side.

[0157] Step S4: removing the defective battery cell with the first side film strip and the second side film strip from the battery string.

[0158] Optionally, before implementing step S2, the defective battery cell removal method in the embodiment of the present application further includes: pressing the defective battery cell from above, pressing the battery cell adjacent to the first side from above, and pressing the battery cell adjacent to the second side from above.

[0159] Before controlling the first side adjacent battery cell and the second side adjacent battery cell to rotate upward, pressing downward against the defective battery cell can ensure that the defective battery cell can press the first side film strip and the second side film strip, and finally ensure that when the first side adjacent battery cell and the second side adjacent battery cell rotate upward, the first side film strip and the second film strip softened by heat can smoothly detach from the first side adjacent battery cell and the second side adjacent battery cell, and the first side film strip and the second side film strip will not detach from the defective battery cell.

[0160] Before controlling the first side adjacent battery cell and the second side adjacent battery cell to rotate upward, press the first side adjacent battery cell and the second side adjacent battery cell from above so that the first side adjacent battery cell and the second side adjacent battery cell respectively press the first side solder strip and the second side solder strip to ensure that the first side solder strip and the second side solder strip move with the first side adjacent battery cell and the second side adjacent battery cell away from the defective battery cell and are separated from the defective battery cell.

[0161] The embodiment of the present application also provides another defective cell removal method, which can automatically remove the defective cell located at the end of the IBC cell string and the film strips adhered to the edges of both sides of the defective cell from the cell string, thereby improving the defective cell removal efficiency.

[0162] The defective battery cell removal method of the embodiment of the present application includes:

[0163] 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 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.

[0164] Step S2, controlling the first side adjacent cell of the defective cell to rotate upward, so that the first side film strip softened by heat is separated from the first side adjacent cell, and a first gap is generated between the first side adjacent cell and the first side welding strip, clamping and fixing the second side welding strip on the back side of the defective cell, the clamped second side welding strip is the end welding strip of the cell string; or, controlling the second side adjacent cell of the defective cell to rotate upward, so that the second side film strip softened by heat is separated from the second side adjacent cell, and a second gap is generated between the second side adjacent cell and the second side welding strip, clamping and fixing the first side welding strip on the back side of the defective cell, the clamped first side welding strip is the end welding strip of the cell string.

[0165] Step S3, controlling all cells on the first side of the defective cell in the cell string to move away from the defective cell, so that the first side film strip is separated from the adjacent cell on the first side, and controlling the second side welding strip to move away from the defective cell; or controlling all cells on the second side of the defective cell in the cell string to move away from the defective cell, so that the second side film strip is separated from the adjacent cell on the second side, and controlling the first side welding strip to move away from the defective cell;

[0166] Step S4: remove the defective battery cell with the film strip from the battery string.

[0167] Optionally, before performing step S2, the defective cell removal method in the embodiment of the present application further includes: pressing the defective cell from above, pressing the cell adjacent to the first side from above, or pressing the cell adjacent to the second side from above.

[0168] Before controlling the first-side adjacent battery cell or the second-side adjacent battery cell to rotate upward, pressing downward against the defective battery cell can ensure that the defective battery cell can press the first side film strip or the second side film strip, and finally ensure that when the first-side adjacent battery cell or the second-side adjacent battery cell rotates upward, the first side film strip or the second film strip softened by heat can smoothly detach from the first-side adjacent battery cell or the second-side adjacent battery cell, and the first side film strip or the second side film strip will not detach from the defective battery cell.

[0169] When the defective battery cell is located at the second end of the battery string, by pressing against the first side adjacent battery cell from above, it can be ensured that when all battery cells on the first side of the defective battery cell move away from the defective battery cell, the first side welding strip moves away from the defective battery cell with the first side adjacent battery cell and is separated from the defective battery cell.

[0170] Similarly, when the defective battery cell is located at the first end of the battery string, it is pressed against the adjacent battery cell on the second side from above to ensure that when all battery cells on the second side of the defective battery cell move away from the defective battery cell, the second side welding strip moves with the adjacent battery cells on the second side away from the defective battery cell and is separated from the defective battery cell.

[0171] The defective battery cell removal method in the embodiment of the present application can be implemented by the defective battery cell removal device in the previous embodiment. For further implementation details, please refer to the relevant description of the defective battery cell removal device in the previous embodiment, which will not be repeated here.

[0172] The present application also provides a repair device, which includes the defective battery cell rejection mechanism in any of the above embodiments.

[0173] After the defective cell removal mechanism removes the defective cell from the intermediate support platform 2, the transport mechanism is also used to transport the replacement cell with its back side facing downward to the intermediate support platform 2, and the back of the replacement cell is adhered with a first side replacement film strip and a second side replacement film strip.

[0174] The first side loading platform 1 is also configured to move back toward the middle loading platform 2 so that the first side replacement film strip is inserted into the first gap between the first side adjacent battery cell and the first side welding strip. The first end of the first side loading platform 1 is also configured to rotate downward and reset so that the first side replacement film strip contacts the first side adjacent battery cell.

[0175] The second side loading platform 3 is also configured to move back toward the middle loading platform 2 so that the second side replacement film strip is inserted into the second gap between the second side adjacent battery cell and the second side welding strip. The second end of the second side loading platform 3 is also configured to rotate downward and reset so that the second side replacement film strip contacts the second side adjacent battery cell.

[0176] The heating mechanism is also used to heat the replacement battery cell so that the first side solder strip is welded to the back side of the replacement battery cell, the second side solder strip is 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.

[0177] 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 Figure 1 , Figure 2 and Fig.13 , a detailed exemplary description is given of the optional working process of the rework device in the embodiment of the present application.

[0178] First, the defective cell 201 and the first side film strip 202 and the second side film strip 203 thereon are disassembled from the battery string by the defective cell rejection mechanism, and the disassembled defective cell 201 with the first side film strip 202 and the second side film strip 203 is removed from the middle carrier 2. The specific disassembly process of the defective cell 201 and the first side film strip 202 and the second side film strip 203 thereon has been described in detail above, so it will not be repeated here.

[0179] Next, the replacement battery sheet with the first-side replacement film strip and the second-side replacement film strip is transported to the middle carrying platform 2 with the back side facing downward by the transport mechanism.

[0180] Next, the first side platform 1 is controlled to move back to its original position toward the middle platform 2, so that the first side replacement film strip is inserted into the first gap between the first side adjacent battery cell 206 and the first side welding strip 204. Subsequently, the first end of the first side platform 2 is rotated downward to reset, so that the first side replacement film strip contacts the first side adjacent battery cell 206, and the first side welding strip 204 is also reset. The second side platform 3 is controlled to move back to its original position toward the middle platform 2, so that the second side replacement film strip is inserted into the second gap between the second side adjacent battery cell 207 and the second side welding strip 205. Subsequently, the second end of the second side platform 3 is rotated downward to reset, so that the second side replacement film strip contacts the second side adjacent battery cell 207, and the second side welding strip 205 is also reset. The first side platform 1 and the second side platform 3 can be synchronously moved back to their original positions toward the middle platform 2, or one of them can move back to their original positions toward the middle platform 2 before the other one does.

[0181] Finally, the heating mechanism 4 is controlled to heat the replacement battery cell so that the first side solder strip 204 is welded to the back side of the replacement battery cell, the second side solder strip 205 is 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 206 adjacent to the first side, and the second side replacement film strip is adhered to the back side of the battery cell 207 adjacent to the second side.

[0182] 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.

[0183] like Figures 9 to 12As shown, optionally, a lifting hole 29 penetrating the middle bearing platform is provided below each solder strip guide groove 27. The defective cell rejection mechanism also includes a solder strip lifting assembly 190, which includes a lifting drive unit 191, a pin mounting plate 192, and a plurality of pins, wherein: the pin mounting plate 192 is connected to the driving end of the lifting drive unit 191, and a plurality of pins are mounted on the pin mounting plate 192 and correspond to the lifting holes 29 one by one, and each pin is inserted into the corresponding lifting hole 29. The lifting drive unit 191 is used to drive the pin mounting plate 192 to rise, so that the upper end of each pin is upwardly inserted into the corresponding solder strip guide groove 27, so as to press the first side solder strip or the second side solder strip located in the solder strip guide groove 27 against the back of the replacement cell.

[0184] By lifting the welding strip lifting assembly 190, 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] The embodiment of the present application also provides a rework method, which can automatically remove the defective battery cell located in the middle of the IBC battery string and the film strips bonded to the edges on both sides of the defective battery cell from the battery string, and automatically replace the battery cell to be laid and bonded into the IBC battery string, thereby realizing automatic rework of the IBC battery string.

[0189] The repair method of the embodiment of the present application includes:

[0190] The defective battery cells are removed from the middle of the battery string by the defective battery cell removal method provided in the above embodiment. The specific removal process of the defective battery cells has been described in detail in the above embodiment and will not be repeated here.

[0191] 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.

[0192] Step S6, controlling 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 gap between the adjacent battery cell 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 move toward the replacement battery cell, so that the second side replacement film strip is inserted into the second gap between the adjacent battery cell on the second side and the second side welding strip.

[0193] Step S7, controlling the first side adjacent cell of the defective cell and the second side adjacent cell of the defective cell to rotate downward and reset, so that the first side replacement film strip contacts the first side adjacent cell, and the second side replacement film strip contacts the second side adjacent cell.

[0194] Step S8, 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.

[0195] After step S7 and before step S8, the repair method further includes: lifting up the first side welding strip and the second side welding strip located below the replacement battery cell so that the first side welding strip and the second side welding strip are tightly attached to the back side of the replacement battery cell.

[0196] In this way, before welding, 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.

[0197] The embodiment of the present application also provides another rework method, which can automatically remove the defective battery cells located at the end of the IBC battery string and the film strips bonded to the edges on both sides of the defective battery cells from the battery string, and automatically replace the battery cells and lay and bond them into the IBC battery string, thereby realizing automatic rework of the IBC battery string.

[0198] Another repair method of the embodiment of the present application includes:

[0199] The defective battery cells are removed from the end of the battery string by the defective battery cell removal method provided in the above embodiment. The specific removal process of the defective battery cells has been described in detail in the above embodiment and will not be repeated here.

[0200] Step S5: transport the replacement cell with its back side facing downward to the position vacated after the defective cell is removed, wherein the back side of the replacement cell is bonded with a first side replacement film strip and a second side replacement film strip.

[0201] Step S6, controlling 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 gap between the adjacent battery cell on the first side and the first side solder strip, and controlling the second side solder strip to move toward the replacement battery cell, so that the second side solder strip moves to a predetermined position below the replacement battery cell; or, controlling 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 gap between the adjacent battery cell on the second side and the second side solder strip, and controlling the first side solder strip to move toward the replacement battery cell, so that the first side solder strip moves to a predetermined position below the replacement battery cell.

[0202] Step S7, control the first side adjacent battery cell to rotate downward and reset so that the first side replacement film strip contacts the first side adjacent battery cell; or control the second side adjacent battery cell to rotate downward and reset so that the second side replacement film strip contacts the second side adjacent battery cell.

[0203] Step S8, heat the replacement battery cell so that the first side solder strip and the second side solder 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; or, the first side solder strip and the second side solder strip are welded to the back side of the replacement battery cell, and the second side replacement film strip is adhered to the back side of the adjacent battery cell on the second side.

[0204] Optionally, after step S7 and before step S8, 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.

[0205] In this way, before welding, 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.

[0206] The above description of the present application is sufficiently detailed and has certain particularities. Those skilled in the art should understand 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, not by the above description in the embodiments. Moreover, the embodiments mentioned in the present application are not limited to being implemented individually, and some embodiments can also be implemented in combination.

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, and 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 and a transport mechanism, wherein: The rework station includes a first side loading station, a middle loading station and a second side loading station, wherein: The middle supporting platform is used to support and absorb the defective battery cells in the battery string and the film strips bonded to the edges of both sides of the defective battery cells, and the back of the battery string faces downward; The first side loading platform is located at a first side of the middle loading platform, and the first side loading platform is used to load the battery cell located at a first side of the defective battery cell, wherein the first end of the first side loading platform is configured to absorb the first side adjacent battery cell adjacent to the defective battery cell; The second side loading platform is located at the second side of the middle loading platform, and the second side loading platform is used to carry the battery cell located at the second side of the defective battery cell, wherein the second end of the second side loading platform is configured to absorb the second side adjacent battery cell adjacent to the defective battery cell; The heating mechanism is configured to be able to move above the intermediate loading 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 desoldered from the defective battery cell, and the film strips on the edges of both sides of the defective battery cell are softened; The first end of the first side loading platform is configured to be able to rotate upwards, so that the first side film strip softened by heat is separated from the first side adjacent battery cell, and a first gap is generated between the first side adjacent battery cell and the first side welding strip; the first side loading platform is also configured to be able to move away from the middle loading platform, so that the first side film strip is separated from the first side adjacent battery cell, and the first side film strip is a film strip adhered between the defective battery cell and the first side adjacent battery cell; The second end of the second side loading platform is configured to be able to rotate upwards, so that the second side film strip softened by heat is separated from the second side adjacent battery cell, and a second gap is generated between the second side adjacent battery cell and the second side welding strip; the second side loading platform is also configured to be able to move away from the middle loading platform, so that the second side film strip is separated from the second side adjacent battery cell, and the second side film strip is a film strip adhered between the defective battery cell and the second side adjacent battery cell; The transport mechanism is used to remove the defective battery sheet with the film strip from the intermediate carrying platform.

2. The defective battery cell rejection mechanism according to claim 1, characterized in that: An intermediate pressing component is disposed at the bottom of the heating mechanism, and the intermediate pressing component is used to press downward against the defective battery cell.

3. The defective battery cell rejection mechanism according to claim 2, 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.

4. The defective battery cell rejection mechanism according to claim 3, 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.

5. The defective cell rejection mechanism according to claim 1, characterized in that: The intermediate carrying platform is provided with a solder strip guiding groove for guiding the first side solder strip and the second side solder strip, the solder strip guiding groove extends along the length direction of the rework station, and each of the solder strip guiding grooves is used to guide one of the first side solder strips or one of the second side solder strips.

6. The defective cell rejection mechanism according to claim 5, characterized in that: The intermediate bearing platform is also provided with a mounting groove extending along the width direction of the rework platform; The defective battery cell rejection mechanism further includes a first movable plate, a second movable plate and an opening and closing driving part, wherein the first movable plate and the second movable plate are arranged in the mounting groove, a plurality of first guide blocks are arranged on the first movable plate, a plurality of second guide blocks corresponding to the first guide blocks are arranged on the second movable plate, and a welding strip guide groove is formed between each of the first guide blocks and the corresponding second guide block; The opening and closing driving part is arranged at both ends of the middle supporting platform, and is used for driving the first movable plate and the second movable plate to move in opposite directions in the mounting groove, so as to drive each of the first guide blocks to approach or open with the corresponding second guide blocks, and when the first guide block and the corresponding second guide block approach, the corresponding first side welding strip or the second side welding strip is guided.

7. The defective cell rejection mechanism according to claim 1, characterized in that: The intermediate carrier is provided with a first suction cup or a first adsorption hole, and the first suction cup or the first adsorption hole is used to adsorb the defective battery sheet, and the defective battery sheet presses the film strip bonded to the edge of the defective battery sheet onto the intermediate carrier; A second suction cup or a second suction hole is provided on the first end of the first side bearing platform, and the second suction cup or the second suction hole is used to absorb the adjacent battery sheet on the first side; A third suction cup or a third suction hole is disposed on the second end of the second side support platform, and the third suction cup or the third suction hole is used to absorb the adjacent battery cell on the second side.

8. 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.

9. The defective cell rejection mechanism according to claim 1, characterized in that: The first side loading platform comprises a first side mounting platform and a first side rotating platform, wherein the first side rotating platform is located between the first side mounting platform and the middle loading platform, the first side rotating platform is used to carry and adsorb the first side adjacent battery slice, the first side mounting platform is used to carry the remaining battery slices located on the first side of the defective battery slice, and the first side rotating platform is configured to be able to rotate vertically; The second side supporting platform includes a second side mounting platform and a second side rotating platform, wherein the second side rotating platform is located between the second side mounting platform and the middle supporting platform, the second side rotating platform is used to carry and adsorb the adjacent battery cells on the second side, the second side mounting platform is used to carry the remaining battery cells located on the second side of the defective battery cell, and the second side rotating platform is configured to be able to rotate vertically.

10. The defective cell rejection mechanism according to claim 9, characterized in that: The first side rotating platform is hinged to the first end of the first side mounting platform, and the second side rotating platform is hinged to the second end of the second side mounting platform; The defective battery cell rejection mechanism further includes a first rotating mechanism and a second rotating mechanism, wherein: The first rotating mechanism is in transmission connection with the first side rotating platform, and the first rotating mechanism is used to drive the first side rotating platform to vertically rotate relative to the first side mounting platform; The second rotating mechanism is in transmission connection with the second side rotating platform, and the second rotating mechanism is used for driving the second side rotating platform to vertically rotate relative to the second side mounting platform.

11. The defective battery cell rejection mechanism according to claim 10, characterized in that: The second rotating mechanism has the same structure as the first rotating mechanism, and the first rotating mechanism includes a first rotating driving part, a guide seat and a lifting seat, wherein: The first rotation driving unit is installed at the bottom of the first side mounting platform, the guide seat is transmission-connected with the first rotation driving unit and is close to the intermediate bearing platform, the first rotation driving unit is used to drive the guide seat to translate toward or away from the intermediate bearing platform, and the guide seat is provided with a vertical guide groove extending in the vertical direction; The upper end of the lifting seat is fixedly connected to the bottom of the first side rotating platform, and the lower end of the lifting seat is provided with a first follower, which is located in the vertical guide groove and can slide along the vertical guide groove; When the first rotation driving unit drives the guide seat to translate toward the intermediate bearing platform, the first follower slides upward along the vertical guide groove, and the lifting seat lifts the first side rotating platform upward, so that the first side rotating platform rotates upward; When the first rotation driving unit drives the guide seat to translate away from the middle bearing platform, the first follower slides downward along the vertical guide groove, and the first side rotating platform rotates downward to reset.

12. The defective battery cell rejection mechanism according to claim 11, characterized in that: The first rotation driving unit includes a support plate, a driving motor, a driving block and a moving plate, wherein: The upper end of the support plate is fixedly connected to the bottom of the first side mounting platform, and a waist hole is provided on the support plate, and the waist hole extends along the width direction of the rework platform; The movable plate is slidably connected to the lower end of the support plate along the length direction of the rework station, the drive motor is fixedly mounted on the movable plate, the drive block is fixedly connected to the drive end of the drive motor, a second follower is arranged on the drive block, the second follower is located in the waist hole and can move in the waist hole, and the guide seat is fixedly mounted on the movable plate; When the driving motor drives the driving block to rotate, the second follower moves in the waist hole, thereby driving the guide seat to translate toward or away from the intermediate bearing platform.

13. The defective battery cell rejection mechanism according to claim 9, characterized in that: The defective cell rejection mechanism further includes a first translation mechanism and a second translation mechanism, wherein: The first translation mechanism is in transmission connection with the first side mounting platform and the first side rotating platform, and the first translation mechanism is used to drive the first side mounting platform and the first side rotating platform to translate toward or away from the intermediate bearing platform; The second translation mechanism is in transmission connection with the second side mounting platform and the second side rotating platform, and is used for driving the second side mounting platform and the second side rotating platform to translate toward or away from the middle supporting platform.

14. The defective battery cell rejection mechanism according to claim 1, characterized in that: The defective battery cell rejection mechanism includes a third rotating mechanism and a fourth rotating mechanism, wherein: The third rotating mechanism is in transmission connection with the first side bearing platform, and the third rotating mechanism is used to drive the first side bearing platform to rotate vertically; The fourth rotating mechanism is in transmission connection with the second side bearing platform, and the fourth rotating mechanism is used to drive the second side bearing platform to rotate vertically.

15. The defective battery cell rejection mechanism according to claim 14, characterized in that: The fourth rotating mechanism has the same structure as the third rotating mechanism, and the third rotating mechanism includes a base and a second rotating driving unit, wherein: The first side bearing platform is hinged on the base; The second rotation driving unit is installed on the base, a driving end of the second rotation driving unit is connected to the first side bearing platform, and the second rotation driving unit drives the second side bearing platform to rotate vertically relative to the base.

16. The defective battery cell rejection mechanism according to claim 15, characterized in that: The defective cell rejection mechanism further includes a third translation mechanism and a fourth translation mechanism, wherein: The third translation mechanism is in driving connection with the base of the third rotation mechanism, and the third translation mechanism is used to drive the first side bearing platform to translate toward or away from the middle bearing platform; The fourth translation mechanism is in driving connection with the base of the fourth rotation mechanism, and the fourth translation mechanism is used to drive the second side bearing platform to translate toward or away from the middle bearing platform.

17. The defective battery cell rejection mechanism according to any one of claims 1 to 16, characterized in that: The rework station further comprises a first solder strip clamping mechanism and a second solder strip clamping mechanism, wherein: The first solder strip clamping mechanism is mounted on the first side loading platform and close to the middle loading platform. When the defective battery cell is a battery cell located at the first end of the battery string, the first solder strip clamping mechanism is used to clamp and fix the first side solder strip on the back side of the defective battery cell; The second solder strip clamping mechanism is installed on the second side support platform and close to the middle support platform. When the defective battery cell is a battery cell located at the second end of the battery string, the second solder strip clamping mechanism is used to clamp and fix the second side solder strip on the back side of the defective battery cell.

18. The defective battery cell rejection mechanism according to claim 17, characterized in that: The second solder strip clamping mechanism has the same structure as the first solder strip clamping mechanism, and the first solder strip clamping mechanism includes a clamping drive unit and a plurality of clamps, wherein: A plurality of the clamps are hinged side by side at the bottom of the first side loading platform along the width direction of the rework platform, a clamping opening opening toward the middle loading platform is formed between the upper end of each of the clamps and the first side loading platform, and each of the clamping openings is corresponding to clamping one of the first side welding strips on the defective battery cell; The clamping drive unit is arranged at the bottom of the first side support platform, and the clamping drive unit is configured to synchronously drive a plurality of the clamps to rotate relative to the first side support platform, so as to drive each of the clamps to clamp or release the first side welding strip located in the corresponding clamping port.

19. The defective battery cell rejection mechanism according to claim 18, characterized in that: The first side loading platform and the second side loading platform can both be raised and lowered relative to the middle loading platform; When the first side loading platform rises relative to the middle loading platform, the first solder strip clamping mechanism is driven to rise synchronously, so that the clamping opening of the first solder strip clamping mechanism is aligned with the first side solder strip on the defective battery cell; When the second side carrying platform rises relative to the middle carrying platform, the second solder strip clamping mechanism is driven to rise synchronously, so that the clamping opening of the second solder strip clamping mechanism is aligned with the second side solder strip on the defective battery cell.

20. A repair device, characterized in that: The repair device comprises a defective cell removal mechanism according to any one of claims 1 to 19; After the defective cell removal mechanism removes the defective cell from the intermediate loading platform, the transport mechanism is further used to transport the replacement cell with its back side facing downward to the intermediate loading platform, wherein the back side of the replacement cell is bonded with a first side replacement film strip and a second side replacement film strip; The first side loading platform is further configured to move back toward the middle loading platform so that the first side replacement film strip is inserted into the first gap between the first side adjacent battery cell and the first side welding strip; the first end of the first side loading platform is further configured to rotate downward and reset so that the first side replacement film strip contacts the first side adjacent battery cell; The second side loading platform is further configured 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 gap between the second side adjacent battery cell and the second side welding strip; the second end of the second side loading platform is further configured to rotate downward to return to its original position, so that the second side replacement film strip 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 is welded to the back side of the replacement battery cell, the second side welding strip is 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.

21. The repair device according to claim 20, characterized in that: The defective battery cell rejection mechanism is the defective battery cell rejection mechanism according to claim 5; A lifting hole penetrating through the middle bearing platform is provided below each of the welding strip guide grooves; The defective cell rejection mechanism further includes a solder strip lifting assembly, which includes a 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 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 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 solder strip guide groove to press the first side solder strip or the second side solder strip located in the solder strip guide groove against the back side of the replacement battery cell.

22. The repair device according to claim 20, characterized in that: The rework device further includes a replacement cell supply mechanism, which is used at least to adhere the first side replacement film strip and the second side replacement film strip to the back side of the cell to obtain the replacement cell.

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