Defective battery piece removing mechanism and repairing device

Abstract

The utility model provides a defective battery piece removing mechanism. The defective battery piece removing mechanism comprises a repair table, a heating mechanism, a first fixing mechanism, a second fixing mechanism and a carrying mechanism. The repair table comprises a middle bearing table for bearing a defective battery piece in the battery string, and a first side bearing table and a second side bearing table for bearing battery pieces on two sides of the defective battery piece; the first fixing mechanism clamps the defective battery piece and the first side film strip on the defective battery piece, and the second fixing mechanism clamps the defective battery piece and the second side film strip on the defective battery piece. And the heating mechanism heats the defective battery piece, so that the first side welding strip and the second side welding strip on the defective battery piece are desoldered, and the first side film strip and the second side film strip are softened. The first side bearing table and the second side bearing table move away from the middle bearing table, so that the first side film strip and the second side film strip are separated from the first side adjacent battery piece and the second side adjacent battery piece respectively. The defective battery piece and the film strip adhered to the defective battery piece are automatically removed from the battery string, and the removal efficiency is improved.

Description

Technical Field

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

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

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

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

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

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

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

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

[0009] The first holding mechanism is used to press the first side film strip on the defective battery sheet against the back side of the defective battery sheet from below, and to press against the first side edge of the defective battery sheet from above, wherein the first side film strip is a film strip bonded to the first side edge of the defective battery sheet;

[0010] The second holding mechanism is used to press the second side film strip on the defective battery sheet against the back side of the defective battery sheet from below, and to press against the second side edge of the defective battery sheet from above, wherein the second side film strip is a film strip bonded to the second side edge of the defective battery sheet;

[0011] The heating mechanism can be moved 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 de-welded from the defective battery cell, and the first side film strip and the second side film strip are softened, wherein the first side welding strip is welded to the back side of the defective battery cell and the battery cell adjacent to the first side, and the second side welding strip is welded to the back side of the defective battery cell and the battery cell adjacent to the second side;

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

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

[0014] The IBC battery string to be repaired is placed on the repair platform with the back side facing downward, wherein the defective battery cell is located on the middle loading platform, all battery cells located on the first side of the defective battery cell are located on the first side loading platform, and all battery cells located on the second side of the defective battery cell are located on the second side loading platform. The defective battery cell and the first side film strip located on the first side edge of the defective battery cell are clamped from the upper and lower sides by the first holding mechanism, and the defective battery cell and the second side film strip located on the second side edge of the defective battery cell are clamped from the upper and lower sides by the second holding mechanism, and the defective battery cell is heated by the heating mechanism, so that the first side welding strip and the second side welding strip on the back of the defective battery cell are desoldered from the defective battery cell, and the first side film strip and the second side film strip at the two side edges of the defective battery cell are softened. Then, the first side loading platform and the second side loading platform are controlled to move away from the middle loading platform, so that the first side film strip softened by heat is separated from the battery cell adjacent to the first side, the second side film strip softened by heat is separated from the battery cell adjacent to the second side, and the first side welding strip and the second side welding strip on the back of the defective battery cell are both separated from the welding point on the defective battery cell. Finally, the defective battery sheet with the first side film strip and the second side film strip is removed from the middle carrying platform by means of a transport mechanism.

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

[0016] In some embodiments, the first holding mechanism includes a first side film strip leaning assembly and a first side film strip pressing assembly, wherein the first side film strip leaning assembly is located between the first side support platform and the middle support platform, the first side film strip leaning assembly is used to lean the first side film strip against the back side of the defective battery cell from below, the first side film strip pressing assembly is arranged on the heating mechanism, and the first side film strip pressing assembly is used to press against the first side edge of the defective battery cell from above to cooperate with the first side film strip leaning assembly to clamp the defective battery cell and the first side film strip; the second holding mechanism includes a second side film strip leaning assembly and a second side film strip pressing assembly, wherein the second side film strip leaning assembly is located between the second side support platform and the middle support platform, the second side film strip leaning assembly is used to lean the second side film strip against the back side of the defective battery cell from below, the second side film strip pressing assembly is arranged on the heating mechanism, and the second side film strip pressing assembly is used to press against the second side edge of the defective battery cell from above to cooperate with the second side film strip leaning assembly to clamp the defective battery cell and the second side film strip.

[0017] The first holding mechanism is configured as a first side film strip leaning assembly and a first side film strip pressing assembly, so that the first side film strip leaning assembly and the first side film strip pressing assembly cooperate with each other to clamp the defective battery cell and the first side film strip from the upper and lower sides. When there is no need to clamp the defective battery cell and the first side film strip, the first side film strip leaning assembly can be completely retracted into the gap between the first side support platform and the middle support platform to avoid the battery string. The first side film strip pressing assembly is arranged on the heating mechanism. When the heating mechanism moves to the top of the middle support platform to heat the defective battery cell, the first side film strip pressing assembly is synchronously moved to the top of the first side film strip leaning assembly. Therefore, there is no need to additionally set up a moving mechanism to drive the first side film strip pressing assembly to move, thereby reducing the equipment cost.

[0018] Similarly, the second holding mechanism is configured as a second side film strip leaning assembly and a second side film strip pressing assembly, so that the second side film strip leaning assembly and the second side film strip pressing assembly cooperate with each other to clamp the defective battery cell and the second side film strip from the upper and lower sides. When there is no need to clamp the defective battery cell and the second side film strip, the second side film strip leaning assembly can be completely retracted into the gap between the second side support platform and the middle support platform to avoid the battery string. The second side film strip pressing assembly is arranged on the heating mechanism. When the heating mechanism moves to the top of the middle support platform to heat the defective battery cell, the second side film strip pressing assembly is synchronously moved to the top of the second side film strip leaning assembly. Therefore, there is no need to additionally set up a moving mechanism to drive the second side film strip pressing assembly to move, thereby reducing the equipment cost.

[0019] In some embodiments, the second side film strip supporting assembly has the same structure as the first side film strip supporting assembly, and the first side film strip supporting assembly includes a first lifting drive unit and a supporting plate, wherein the supporting plate is connected to the driving end of the first lifting drive unit, and the first lifting drive unit is used to drive the supporting plate to rise and fall; when the first lifting drive unit drives the supporting plate to rise to a high position, the supporting plate presses the first side film strip on the defective battery cell against the back side of the defective battery cell; a first solder strip avoidance groove for avoiding the first side solder strip is provided on the upper end surface of the supporting plate.

[0020] By setting the first side film strip against the component, the first side film strip against the component avoids the first side welding strip while pressing the first side film strip on the defective cell against the back of the defective cell, thereby ensuring that when the first side bearing platform moves away from the middle bearing platform, the first side film strip softened by heat can be separated from the first side adjacent cell, and the first side welding strip after desoldering can move relative to the defective cell and detach from the welding point on the defective cell. Similarly, by setting the second side film strip against the component, the second side film strip against the component avoids the second side welding strip while pressing the second side film strip on the defective cell against the back of the defective cell, thereby ensuring that when the second side bearing platform moves away from the middle bearing platform, the second side film strip softened by heat can be separated from the second side adjacent cell, and the second side welding strip after desoldering can move relative to the defective cell and detach from the welding point on the defective cell.

[0021] In some embodiments, the upper end surface of the top support plate is a first plane parallel to the horizontal plane; the second side film strip pressing assembly has the same structure as the first side film strip pressing assembly, and the first side film strip pressing assembly includes a first pressure needle row, and the first pressure needle row includes a plurality of first pressure needles arranged at intervals along the width direction of the rework table, and the lower end surface of each first pressure needle is located in a second plane parallel to the horizontal plane.

[0022] For the first holding mechanism, the upper end surface of the top plate and the lower end surface of the first pressure pin row are planes that are opposite to each other, and when the two are pressed up and down, they can implement a firm clamping of the defective battery cell and the first side film strip. The gap between adjacent pressure pins in the first pressure pin row can implement the avoidance of the first side welding strip, thereby ensuring that when the first side bearing platform moves away from the middle bearing platform, the first side welding strip after desoldering can move relative to the defective battery cell and break away from the welding point on the defective battery cell. Similarly, for the second holding mechanism, the upper end surface of the top plate and the lower end surface of the first pressure pin row are planes that are opposite to each other, and when the two are pressed up and down, they can implement a firm clamping of the defective battery cell and the second side film strip. The gap between adjacent pressure pins in the first pressure pin row can implement the avoidance of the second side welding strip, thereby ensuring that when the second side bearing platform moves away from the middle bearing platform, the second side welding strip after desoldering can move relative to the defective battery cell and break away from the welding point on the defective battery cell.

[0023] In some embodiments, the upper end surface of the top support plate is a first curved surface inclined downward toward the first side support platform; the second side film strip pressing assembly has the same structure as the first side film strip pressing assembly, and the first side film strip pressing assembly includes a pressure plate extending along the width direction of the rework table, and the lower end surface of the pressure plate is a second curved surface that cooperates with the first curved surface.

[0024] For the first holding mechanism, the upper end surface of the top support plate and the lower end surface of the pressure plate are both set as arc-shaped surfaces. When the top support plate and the pressure plate clamp the defective battery cell and the first side film strip, the first side edge of the battery cell bends downward, thereby causing the first side film strip softened by heat to partially or completely separate from the battery cell adjacent to the first side. For the second holding mechanism, the upper end surface of the top support plate and the lower end surface of the pressure plate are both set as arc-shaped surfaces. When the top support plate and the pressure plate clamp the defective battery cell and the second side film strip, the second side edge of the battery cell bends downward, thereby causing the second side film strip softened by heat to partially or completely separate from the battery cell adjacent to the second side. In this way, when the first side support platform and the second side support platform move away from the middle support platform, the first side film strip and the second side film strip are separated from the battery cell adjacent to the first side and the battery cell adjacent to the second side, respectively.

[0025] In some embodiments, a middle pressing assembly is disposed at the bottom of the heating mechanism, and the middle pressing assembly is used to press downward against the middle of the defective battery cell.

[0026] The first holding mechanism clamps the defective battery cell and the first side film strip. When the second holding mechanism clamps the defective battery cell and the first side film strip, the middle pressing assembly moves with the heating mechanism to the top of the defective battery cell and presses downward against the middle of the defective battery cell, thereby pressing the defective battery cell downward and flattening it. In this way, it can be ensured that the defective battery cell can be tightly attached and fixed by the middle supporting platform, and finally ensured that when the first side supporting platform and the second side supporting platform move away from the middle supporting platform, the defective battery cell does not move with the first adjacent battery cell and the second adjacent battery cell.

[0027] In some embodiments, the intermediate pressing assembly includes at least two second pressing needle rows arranged at intervals along the length direction of the rework table, and each second pressing needle row includes a plurality of second pressing needles arranged at intervals along the width direction of the rework table.

[0028] At least two second pressing needle rows arranged at intervals along the length direction of the rework station press the defective battery cell from different positions, thereby ensuring that the defective battery cell can be pressed flat on the middle carrier and preventing the defective battery cell from being damaged due to uneven pressure.

[0029] 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.

[0030] Before the first side supporting platform and the second side supporting platform move away from the middle supporting platform, the first side pressing assembly and the second side pressing assembly press the first side adjacent battery cell and the second side adjacent battery cell against the first side supporting platform and the second side supporting platform respectively, thereby ensuring that the first side adjacent battery cell and the second side adjacent battery cell move with the first side supporting platform and the second side supporting platform respectively, and are separated from the defective battery cells.

[0031] 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, wherein 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.

[0032] Before the first side support platform and the second side support platform move away from the middle support platform, the adsorbent releases the pressing tooling adsorbed thereon, so that the pressing tooling falls onto the first side adjacent battery cell and the second side adjacent battery cell, so as to press the first side adjacent battery cell and the second side adjacent battery cell onto the first side support platform and the second side support platform respectively. Among them, the adsorbent is integrated into the heating mechanism, so that the adsorbent and the pressing tooling can move with the heating mechanism, thereby reducing the equipment cost. The adsorbent is set on an independent moving part, and the independence and flexibility of the movement of the adsorbent are improved.

[0033] In some embodiments, a second solder strip avoidance groove for avoiding the first side solder strip and the second side solder strip is provided on the middle supporting platform, and the second solder strip avoidance groove extends along the length direction of the rework platform, and each second solder strip avoidance groove is used to accommodate a first side solder strip or a second side solder strip; each second solder strip avoidance groove is provided with a clamping component for guiding the corresponding first side solder strip or second side solder strip.

[0034] By arranging the second solder strip avoidance groove on the middle supporting platform, the first side solder strip and the second side solder strip on the defective battery cell are guided and avoided. On the one hand, it can prevent the first side solder strip and the second side solder strip on the defective battery cell from being pressed on the middle supporting platform by the defective battery cell, ensuring that when the first side supporting platform and the second side supporting platform move away from the middle supporting platform, the first side solder strip and the second side solder strip after desoldering with the defective battery cell can move smoothly relative to the defective battery cell. On the other hand, the first side solder strip and the second side solder strip can be guided and limited during their movement.

[0035] By arranging a clamping assembly in the second solder strip avoidance groove, the first side solder strip and the second side solder strip are limited and guided, so that the first side solder strip and the second side solder strip always remain in the second solder strip avoidance groove during the movement relative to the defective battery cell.

[0036] In some embodiments, a mounting groove extending along the width direction of the rework station is further provided on the intermediate carrier platform, and the mounting groove passes through all the second solder strip avoidance grooves; the defective battery cell removal mechanism also includes a first clamp, a second clamp and a clamping drive unit, wherein the first clamp and the second clamp are stacked up and down in the mounting groove, a first clamp is provided at a position of the first clamp corresponding to each second solder strip avoidance groove, and a second clamp paired with the first clamp is provided at a position of the second clamp corresponding to each second solder strip avoidance groove, and each second clamp and the corresponding first clamp constitute a clamping assembly; the clamping drive unit is arranged below the intermediate carrier platform, and the clamping drive unit is transmission-connected to the first clamp and the second clamp, and the clamping drive unit is used to drive the first clamp and the second clamp to move in opposite directions in the mounting groove to drive each clamping assembly to synchronously close or open, and guide the first side solder strip or the second side solder strip when the clamping assembly closes.

[0037] By arranging a first clamping plate, a second clamping plate and a clamping drive part, and arranging a first clamping jaw and a second clamping jaw on the first clamping plate and the second clamping plate respectively, it is achieved that when the clamping drive part drives the first clamping plate and the second clamping plate to move in opposite directions in the installation groove, each clamping component is synchronously closed or opened to guide and release the first side welding strip or the second side welding strip.

[0038] In some embodiments, the clamping drive portion includes a first lifting drive member, a first connecting rod, a second lifting drive member and a second connecting rod, wherein: the first connecting rod is an L-shaped structure, one end of the first connecting rod is connected to the driving end of the first lifting drive member, and the other end of the first connecting rod is connected to the first end of the first clamping plate, and the first end of the first clamping plate is close to the first end of the mounting groove; the second connecting rod is an L-shaped structure, one end of the second connecting rod is connected to the driving end of the second lifting drive member, and the other end of the second connecting rod is connected to the second end of the second clamping plate, and the second end of the second clamping plate is close to the second end of the mounting groove; when the first lifting drive member drives the first clamping plate to move in the mounting groove via the first connecting rod, the second lifting drive member drives the second clamping plate to move in the opposite direction of the first clamping plate in the mounting groove via the second connecting rod.

[0039] A clamping drive part with a simple structure is provided, which realizes reverse driving of the second clamping plate and the first clamping plate, and finally makes each clamping assembly close or open synchronously.

[0040] Optionally, a first guide hole is provided on the first clamping plate, and a second guide hole matching the first guide hole is provided on the second clamping plate, the first guide hole and the second guide hole both extend along the width direction of the rework table, and the first clamping plate and the second clamping plate are slidably connected via connecting pins passing through the first guide hole and the second guide hole.

[0041] The sliding guidance of the second clamping plate and the first clamping plate is realized, and the second clamping plate and the first clamping plate are prevented from being stuck during the reverse sliding process.

[0042] In some embodiments, a first suction cup is provided on the middle supporting platform and is located between adjacent second welding strip avoidance grooves, and the first suction cup is used to absorb defective battery cells; a second suction cup is provided on the end of the first side supporting platform close to the middle supporting platform, and the second suction cup is used to absorb adjacent battery cells on the first side; a third suction cup is provided on the end of the second side supporting platform close to the middle supporting platform, and the third suction cup is used to absorb adjacent battery cells on the second side.

[0043] By setting a first suction cup on the middle loading platform, the defective battery cell can be adsorbed and fixed on the middle loading platform. By setting a second suction cup on the first side loading platform, the first side adjacent battery cell can be adsorbed and fixed on the first side loading platform. By setting a third suction cup on the second side loading platform, the second side adjacent battery cell can be adsorbed and fixed on the second side loading platform. In this way, when the first side loading platform and the second side loading platform move away from the middle loading platform, it can be ensured that the first side adjacent battery cell and the second side adjacent battery cell are separated from the defective battery cell.

[0044] 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.

[0045] The heating component cooperates with the heating mechanism to heat the defective battery cell, thereby shortening the softening time of the first side film tape and the second side film tape, and shortening the desoldering time of the first side solder tape, the second side solder tape and the defective battery cell.

[0046] The present application also provides a rework device, which includes the defective battery cell removal mechanism described in any of the above items; after the defective battery cell is removed from the intermediate loading platform, the transport mechanism is also used to transport the replacement battery cell with the back side facing downward to the intermediate loading platform, and the first side replacement film strip and the second side replacement film strip are respectively adhered to the two side edges of the back side of the replacement battery cell; the first side loading platform is also used to rise relative to the intermediate loading platform, so that a first insertion gap is generated between the first side adjacent battery cell and the first side welding strip; the second side loading platform is also configured to rise relative to the intermediate loading platform, so that a second insertion gap is generated between the second side adjacent battery cell and the second side welding strip; the first side loading platform is also used to move back to its position toward the intermediate loading platform, so that the first side replacement film strip is inserted into the second side The first side support platform is also used to move toward the middle support platform to return to its position so that the second side replacement film strip is inserted into the second insertion gap; the first side support platform is also used to descend and return to its position relative to the middle support platform so that the first side replacement film strip inserted into the first insertion gap contacts the first side adjacent battery cell; the second side support platform is also used to descend and return to its position relative to the middle support platform so that the second side replacement film strip inserted into the second insertion gap contacts the second side adjacent battery cell; the heating mechanism is also used to heat the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is bonded to the back side of the first side adjacent battery cell, and the second side replacement film strip is bonded to the back side of the second side adjacent battery cell.

[0047] 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.

[0048] In some embodiments, each second solder strip avoidance groove is provided with a lifting hole passing through the middle supporting platform; the defective battery cell rejection mechanism also includes a solder strip lifting assembly, the solder strip lifting assembly includes a second lifting drive unit, a pin mounting plate and a plurality of pins, wherein: the pin mounting plate is connected to the driving end of the second lifting drive unit, a plurality of pins are mounted on the pin mounting plate and correspond one to one to the lifting holes, and each pin is inserted into the corresponding lifting hole; the second lifting drive unit is used to drive the pin mounting plate to rise, so that the upper end of each pin is inserted upward into the corresponding second solder strip avoidance groove, so as to press the first side solder strip or the second side solder strip located in the second solder strip avoidance groove against the back of the replacement battery cell.

[0049] 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.

[0050] In some embodiments, the rework device further includes a replacement cell supply mechanism, which is used to adhere the first side replacement film strip and the second side replacement film strip to both side edges of the back side of the cell to obtain a replacement cell.

[0051] 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

[0052] Figure 1 It is a schematic structural diagram of a defective battery cell rejection mechanism in an embodiment of the present application at a first viewing angle;

[0053] Figure 2 for Figure 1 A partial enlarged view of area A;

[0054] Figure 3 A schematic diagram of the positional relationship between the battery string to be repaired and the repair station;

[0055] Figure 4 It is a schematic structural diagram of the defective battery cell rejection mechanism of the embodiment of the present application at a third viewing angle;

[0056] Figure 5 for Figure 4 A local enlarged view of area B;

[0057] Figure 6 It is a schematic structural diagram of the intermediate supporting platform in the embodiment of the present application at a first viewing angle;

[0058] Figure 7 is a schematic structural diagram of the intermediate supporting platform in the embodiment of the present application at a second viewing angle;

[0059] Figure 8 is a schematic structural diagram of the intermediate supporting platform in the embodiment of the present application at a third viewing angle;

[0060] Fig. 9 for Figure 8 AA section view;

[0061] Fig.10 for Figure 8 BB cross-sectional view;

[0062] Fig.11 It is a schematic structural diagram of the defective battery cell rejection mechanism of the embodiment of the present application at a fourth viewing angle;

[0063] Fig.12 for Fig.11 A local enlarged view of the C region;

[0064] Fig.13 It is a schematic diagram of the structure of the top supporting plate and the pressing plate in the embodiment of the present application;

[0065] Fig.14 It is a schematic structural diagram of a defective battery cell rejection mechanism in another embodiment of the present application at a first viewing angle;

[0066] Figures 1 to 14 Included:

[0067] A first side loading platform 1;

[0068] Middle loading platform 2:

[0069] Second welding strip avoidance groove 21;

[0070] Clamping assembly 22;

[0071] Mounting slot 23;

[0072] First clamping plate 24: first clamping jaw 221;

[0073] Second clamping plate 25: second clamping jaw 222;

[0074] The clamping driving part 26 includes a first lifting driving member 261, a first connecting rod 262, a second lifting driving member 263, and a second connecting rod 264;

[0075] Connecting pin 27;

[0076] A first suction cup 28;

[0077] The welding strip lifting assembly 29 includes a second lifting driving unit 291, a lifting pin mounting plate 292, and a lifting pin 293;

[0078] Second side loading platform 3:

[0079] The first holding mechanism 4:

[0080] The first side film strip supporting assembly 41 includes a first lifting driving unit 411, a supporting plate 412, and a first welding strip avoiding groove 413;

[0081] The first side film strip pressing assembly 42 includes a first pressing needle row 421 and a pressing plate 422;

[0082] Second holding mechanism 5:

[0083] The second side film strip abuts against the component 51;

[0084] The second side film strip is pressed against the component 52;

[0085] Heating mechanism 6;

[0086] Middle pressing component 7:

[0087] The second pressing needle row 71;

[0088] First side pressing component 8:

[0089] Adsorption member 81, pressing tool 82, moving part 83, lifting module 831, lateral movement module 832;

[0090] A second side pressing component 9;

[0091] Defective battery cell 101 , first side adjacent battery cell 102 , first side film strip 103 , second side adjacent battery cell 104 , second side film strip 105 . DETAILED DESCRIPTION

[0092] 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.

[0093] 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 be used to remove defective battery cells of IBC battery strings with membrane strips, and thus cannot be used to repair IBC battery strings with membrane strips. The IBC battery string with membrane strips is formed by welding IBC battery cells with welding strips. Membrane strips are bonded between adjacent battery cells in the IBC battery string and at the edges of the battery cells at the ends. The membrane strips are located between the corresponding battery cells and the welding strips.

[0094] 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.

[0095] like Figures 1 to 3 As shown, the defective cell removal mechanism in the embodiment of the present application includes a rework station, a heating mechanism 6, a first holding mechanism 4, a second holding mechanism 5 and a transport mechanism, wherein:

[0096] The rework station includes a first side loading station 1, an intermediate loading station 2, and a second side loading station 3, wherein the intermediate loading station 2 is used to load the defective battery cell 101 in the battery string. The first side loading station 1 is located on the first side (e.g., the left side) of the intermediate loading station 2, and the first side loading station 1 is used to load all battery cells located on the first side of the defective battery cell 101 in the battery string, and the second side loading station 3 is located on the second side (e.g., the right side) of the intermediate loading station 2, and the second side loading station 3 is used to load all battery cells located on the second side of the defective battery cell 101 in the battery string. The battery string is placed on the rework station with its back side facing downward.

[0097] The first holding mechanism 4 is used to press the first side film strip 103 on the defective battery cell 101 against the back side of the defective battery cell 101 from below, and to press against the first side edge of the defective battery cell 101 from above. The first side film strip 103 is a film strip adhered to the first side edge of the defective battery cell 101.

[0098] The second holding mechanism 5 is used to press the second side film strip 105 on the defective battery cell 101 against the back side of the defective battery cell 101 from below, and to press against the second side edge of the defective battery cell 101 from above. The second side film strip 105 is a film strip bonded to the second side edge of the defective battery cell 101.

[0099] The heating mechanism 6 can be moved to above the middle supporting platform 2, and the heating mechanism 6 is used to heat the defective battery cell 101 so that the first side solder strip and the second side solder strip on the back side of the defective battery cell 101 are desoldered from the defective battery cell 101, and the first side film strip 103 and the second side film strip 105 are softened, wherein the first side solder strip is welded to the back side of the defective battery cell 101 and the first side adjacent battery cell 102, and the second side solder strip is welded to the back side of the defective battery cell 101 and the second side adjacent battery cell 104.

[0100] The first side adjacent battery cell 102 is a battery cell located on the first side of the defective battery cell 101 and adjacent to the defective battery cell 101, and the second side adjacent battery cell 104 is a battery cell located on the second side of the defective battery cell 101 and adjacent to the defective battery cell 101. "Desoldering" means heating the defective battery cell 101 so that the solder of the first side solder strip and the second side solder strip is melted by the heat, thereby making the welding between the first side solder strip, the second side solder strip and the defective battery cell 101 invalid.

[0101] The first side platform 1 and the second side platform 3 can both move away from the middle platform 2, so that the first side film strip 103 softened by heat is separated from the first side adjacent battery cell 102, and the second side film strip 105 softened by heat is separated from the second side adjacent battery cell 104. The "separation" mentioned here is to separate the film strip from the adjacent battery cell in the horizontal direction, so that the film strip will not interfere with the adjacent battery cell when the defective battery cell is removed later; at the same time, during the separation process, the first side welding strip and the second side welding strip are also detached from the welding point on the defective battery cell. When separating, it is only necessary to pull a little distance apart, and more parts of the first side welding strip and the second side welding strip are still left on the middle platform, and it is not necessary to completely pull the first side welding strip and the second side welding strip out from under the defective battery cell. That is, at this time, the defective battery cell 101 and the first side film strip 103 and the second side film strip 105 thereon are disassembled from the battery string.

[0102] The transport mechanism is used to remove the defective battery cell 101 with the first side film strip 103 and the second side film strip 105 from the intermediate carrying platform 2 .

[0103] In order to enable those skilled in the art to more clearly understand the working process of the defective battery cell rejection mechanism in the embodiment of the present application, the following will continue to combine Figures 1 to 3 , the working process of the defective battery cell removal mechanism in the embodiment of the present application is described in detail.

[0104] In the initial state, the first side loading platform 1 and the second side loading platform 3 of the rework station are close to the middle loading platform 2, and the loading surfaces of the first side loading platform 1, the middle loading platform 2 and the second side loading platform 3 are at the same height. The heating mechanism 6 is in a evacuation position away from the rework station.

[0105] The battery string to be repaired is placed with its back side facing downward on the repair platform, wherein the defective battery cell 101 in the battery string is located on the middle carrier 2 and is fixed by the middle carrier 2. All battery cells on the first side of the defective battery cell 101 in the battery string are located on the first side carrier 1, and all battery cells on the second side of the defective battery cell 101 in the battery string are located on the second side carrier 3.

[0106] Next, the first holding mechanism 4 is controlled to press the first side film strip 103 on the defective cell 101 against the back of the defective cell 101 from below, and press against the first side edge of the defective cell 101 from above. At the same time, the second holding mechanism 5 is controlled to press the second side film strip 105 on the defective cell 101 against the back of the defective cell 101 from below, and press against the second side edge of the defective cell 101 from above. Subsequently, the heating mechanism 6 is controlled to move above the intermediate carrier 2, and the heating mechanism 6 heats the defective cell 101, so that the first side solder strip and the second side solder strip on the back of the defective cell 101 are desoldered from the defective cell 101, and the first side film strip 103 and the second side film strip 105 are softened.

[0107] Of course, the heating mechanism 6 can also be controlled to heat the defective battery cell 101 first, so that the first side solder strip and the second side solder strip are de-soldered from the defective battery cell 101, and the first side film strip 103 and the second side film strip 105 are softened, and then the first holding mechanism 4 is controlled to clamp the defective battery cell and the first side film strip 103 located at the first side edge of the defective battery cell 101 from the upper and lower sides, and the second holding mechanism 5 is controlled to clamp the defective battery cell 101 and the second side film strip 105 located at the second side edge of the defective battery cell 101 from the upper and lower sides. Alternatively, the first holding mechanism 4 is controlled to clamp the defective battery cell 101 and the first side film strip 103 located at the first side edge of the defective battery cell 101 from the upper and lower sides, and the second holding mechanism 5 clamps the defective battery cell 101 and the second side film strip 105 located at the second side edge of the defective battery cell 101 from the upper and lower sides, while the heating mechanism 6 is controlled to heat the defective battery cell 101, so that the first side solder strip and the second side solder strip on the back side of the defective battery cell 101 are de-soldered from the defective battery cell 101, and the first side film strip 103 and the second side film strip 105 are softened.

[0108] Next, the first side platform 1 and the second side platform 3 are controlled to move away from the middle platform 2, so that the first side film strip 103 softened by heat is separated from the first side adjacent battery cell 102, and the second side film strip 105 softened by heat is separated from the second side adjacent battery cell 104. At the same time, the first side solder strip and the second side solder strip that have been desoldered from the defective battery cell 101 are separated from the defective battery cell 101. At this point, the defective battery cell 101 and the first side film strip 103 and the second side film strip 105 thereon are disassembled from the battery string.

[0109] Finally, the defective battery cell 101 with the first side film strip 103 and the second side film strip 105 is removed from the intermediate carrying platform 2 by the transport mechanism.

[0110] It can be seen that through the cooperation of the rework station, the heating mechanism 6, the first holding mechanism 4, the second holding mechanism 5 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.

[0111] like Figure 3As shown, optionally, the first holding mechanism 4 includes a first side film strip leaning component 41 and a first side film strip pressing component 42, wherein the first side film strip leaning component 41 is located between the first side support platform 1 and the middle support platform 2, the first side film strip leaning component 41 is used to press the first side film strip 103 against the back side of the defective battery cell 101 from below, and the first side film strip pressing component 42 is arranged on the heating mechanism 6, and the first side film strip pressing component 42 is used to press against the first side edge of the defective battery cell 101 from above, so as to cooperate with the first side film strip leaning component 41 to clamp the defective battery cell 101 and the first side film strip 103.

[0112] Similarly, the second holding mechanism 5 includes a second side film strip leaning component 51 and a second side film strip pressing component 52, wherein the second side film strip leaning component 51 is located between the second side support platform 3 and the middle support platform 2, the second side film strip leaning component 51 is used to lean the second side film strip 105 against the back side of the defective battery cell 101 from below, and the second side film strip pressing component 52 is arranged on the heating mechanism 6, and the second side film strip pressing component 52 is used to press against the second side edge of the defective battery cell 101 from above, so as to cooperate with the second side film strip leaning component 51 to clamp the defective battery cell 101 and the second side film strip 105.

[0113] When there is no need to clamp the defective battery cell 101, the first side film strip 103 and the second side film strip 105, the first side film strip supporting assembly 41 and the second side film strip supporting assembly 51 can be completely retracted between the first side support platform 1 and the middle support platform 2 and between the second side support platform 3 and the middle support platform 2, thereby avoiding the battery string.

[0114] By arranging the first side film strip pressing component 42 and the second side film strip pressing component 52 on the heating mechanism 6, when the heating mechanism 6 moves to the top of the intermediate loading platform 2 to heat the defective battery cell 101, the first side film strip pressing component 42 and the second side film strip pressing component 52 can be synchronously moved to the top of the first side film strip top component 41 and the second side film strip top component 51 respectively. In this way, when the heating mechanism 6 descends toward the intermediate loading platform 2, the first side film strip pressing component 42 can cooperate with the first side film strip top component 41 to clamp the defective battery cell 101 and the first side film strip 103, and the second side film strip pressing component 52 can cooperate with the second side film strip top component 51 to clamp the defective battery cell 101 and the second side film strip 105.

[0115] That is to say, in the embodiment of the present application, there is no need to additionally provide a moving mechanism for driving the first side film strip pressing component 42 and the second side film strip pressing component 52 to move, thereby reducing the equipment cost.

[0116] Optionally, the second side film strip abutting assembly 51 has the same structure as the first side film strip abutting assembly 41. Figure 3As shown, taking the first side film strip leaning assembly 41 as an example, it includes a first lifting driving unit 411 and a leaning plate 412, wherein the leaning plate 412 is connected to the driving end of the first lifting driving unit 411, and the first lifting driving unit 411 is used to drive the leaning plate 412 to rise and fall. When the first lifting driving unit 411 drives the leaning plate 412 to rise to a high position, the leaning plate 412 leans the first side film strip 103 on the defective battery cell 101 against the back of the defective battery cell 101.

[0117] Optional, such as Figure 6 As shown, a first solder strip avoidance groove 413 for avoiding the first side solder strip is provided on the upper end surface of the top support plate 412. When the top support plate 412 of the first side film strip support assembly 41 pushes the first side film strip 103 against the back of the defective battery cell 101, the first side solder strip on the defective battery cell 101 can be avoided through the first solder strip avoidance groove 413, that is, the first side solder strip on the defective battery cell 101 is not pushed against the back of the defective battery cell 101 by the top support plate 412. In this way, when the first side support platform 1 moves away from the middle support platform 2, the first side film strip 103 softened by heat can be separated from the first side adjacent battery cell 102, and the first side solder strip after desoldering from the defective battery cell 101 can move relative to the defective battery cell 101 and detach from the defective battery cell 101.

[0118] Similarly, when the second side film strip against the supporting plate 412 of the second side film strip against the component 51 presses the second side film strip 105 against the back of the defective cell 101, the second side welding strip on the defective cell 101 can be avoided through the first welding strip avoiding groove 413, that is, the second side welding strip on the defective cell 101 is not pressed against the back of the defective cell 101 by the supporting plate 412. In this way, when the second side supporting platform 3 moves away from the middle supporting platform 2, the second side film strip 105 softened by heat can be separated from the second side adjacent cell 104, and the second side welding strip after desoldering from the defective cell 101 can move relative to the defective cell 101 and detach from the defective cell 101.

[0119] like Figures 2 to 5 As shown, optionally, the upper end surface of the top support plate 412 is a first plane parallel to the horizontal plane. The first side film strip pressing assembly 42 and the second side film strip pressing assembly 52 have the same structure, and both include a first pressing needle row 421. The first pressing needle row 421 includes a plurality of first pressing needles arranged at intervals along the width direction of the rework station, and the lower end surface of each first pressing needle is located in a second plane parallel to the horizontal plane.

[0120] For the first holding mechanism 4, the upper end surface of the top support plate 412 and the lower end surface of the first row of pressing pins 421 are planes that are opposite to each other. When the two are pressed against each other, the defective battery cell 101 and the first side film strip 103 can be firmly clamped, and the gaps between adjacent pressing pins in the first row of pressing pins can be used to avoid the first side welding strip. Similarly, for the second holding mechanism 5, the upper end surface of the top support plate 412 and the lower end surface of the first row of pressing pins 421 are planes that are opposite to each other. When the two are pressed against each other, the defective battery cell 101 and the second side film strip 105 can be firmly clamped, and the gaps between adjacent pressing pins in the first row of pressing pins can be used to avoid the second side welding strip.

[0121] like Figures 11 to 13 As shown, optionally, for the first holding mechanism 4, the upper end surface of the top plate 412 is a first curved surface that is tilted downward toward the first side bearing platform 1, and the first side film strip pressing assembly 42 includes a pressing plate 422 that is extended along the width direction of the rework platform, and the lower end surface of the pressing plate 422 is a second curved surface that cooperates with the first curved surface. With such a configuration, when the top plate 412 and the pressing plate 422 clamp the defective battery cell 101 and the first side film strip 103, the first side edge of the defective battery cell 101 bends downward, thereby driving the first side film strip 103 that is softened by heat to partially or completely separate from the first side adjacent battery cell 102.

[0122] Similarly, for the second holding mechanism 5, the upper end surface of the top plate 412 is a first arc-shaped surface that tilts downward toward the second side bearing platform 3, and the second side film strip pressing assembly 42 includes a pressing plate 422 that extends along the width direction of the rework platform, and the lower end surface of the pressing plate 422 is a second arc-shaped surface that cooperates with the first arc-shaped surface. In this way, when the top plate 412 and the pressing plate 422 clamp the defective battery cell 101 and the second side film strip 105, the second side edge of the defective battery cell 101 bends downward, thereby driving the second side film strip 105 softened by heat to partially or completely separate from the second side adjacent battery cell 104.

[0123] Since the first side film strip 103 softened by heat has been partially or completely separated from the first side adjacent battery cell 102, and the second side film strip 105 softened by heat has been partially or completely separated from the second side adjacent battery cell 104, when the first side loading platform 1 and the second side loading platform 3 move away from the middle loading platform 2, the first side film strip 103 and the second side film strip 105 can be separated from the first side adjacent battery cell 102 and the second side adjacent battery cell 104 more easily.

[0124] like Figure 4 and Figure 5As shown, optionally, an intermediate pressing component 7 is further provided at the bottom of the heating mechanism 6. When the heating mechanism 6 descends toward the defective cell 101, the intermediate pressing component 7 first presses downward against the middle of the defective cell 101, thereby flattening the defective cell 101 downward, so as to ensure that the defective cell 101 can be closely attached to the intermediate carrier 101 and is sucked and fixed by the intermediate carrier 101. Finally, it is ensured that when the first side carrier 1 and the second side carrier 3 move away from the intermediate carrier 2, the defective cell 101 does not move with the first adjacent cell 102 and the second adjacent cell 103.

[0125] like Figure 5 As shown, optionally, the middle pressing assembly 7 includes at least two second pressing needle rows 71 arranged at intervals along the length direction of the rework station, and each second pressing needle row 71 includes a plurality of second pressing needles arranged at intervals along the width direction of the rework station. At least two second pressing needle rows 71 arranged at intervals along the length direction of the rework station press the defective battery cell 101 from different positions, thereby ensuring that the defective battery cell 101 can be flattened on the middle supporting platform 2, and preventing the defective battery cell 101 from being damaged due to uneven pressure.

[0126] like Figure 3 As shown, optionally, the defective battery cell removal mechanism in the embodiment of the present application also includes a first side pressing component 8 and a second side pressing component 9, wherein: the first side pressing component 8 is used to press downward against the first side adjacent battery cell 102, and the second side pressing component 9 is used to press downward against the second side adjacent battery cell 104.

[0127] Before the first side loading platform 1 and the second side loading platform 3 move away from the middle loading platform 2, the first side pressing component 8 and the second side pressing component 9 press the first side adjacent battery cell 102 and the second side adjacent battery cell 104 onto the first side loading platform 1 and the second side loading platform 3 respectively, thereby ensuring that the first side adjacent battery cell 102 and the second side adjacent battery cell 104 move with the first side loading platform 1 and the second side loading platform 2 respectively, and are separated from the defective battery cell 101.

[0128] Optionally, the second side pressing component 9 has the same structure as the first side pressing component 8. Taking the first side pressing component 8 as an example, it includes an adsorption member 81 and a pressing tool 82, wherein the adsorption member 81 is connected to the heating mechanism 6, the heating mechanism 6 is used to drive the adsorption member 81 to translate and rise and fall, and the pressing tool 82 is adsorbed on the adsorption member 81.

[0129] When the heating mechanism 6 moves to above the defective cell 101 to perform heating, the first side pressing assembly 8 and the second side pressing assembly 9 are driven by the heating mechanism 6 to move above the first side adjacent cell 102 and the second side adjacent cell 104 respectively.

[0130] Before the first side loading platform 1 and the second side loading platform 3 move away from the middle loading platform 2, the adsorbent 81 of the first side pressing component 8 releases the pressing tooling 82 adsorbed thereon, so that the pressing tooling 82 falls onto the first side adjacent battery slice 102, thereby pressing and fixing the first side adjacent battery slice 102 on the first side loading platform 1. Similarly, the adsorbent 81 of the second side pressing component 9 releases the pressing tooling 82 adsorbed thereon, so that the pressing tooling 82 falls onto the second side adjacent battery slice 104, thereby pressing and fixing the second side adjacent battery slice 104 on the second side loading platform 3.

[0131] The adsorption parts 81 of the first side pressing assembly 8 and the second side pressing assembly 9 are integrated and installed into the heating mechanism 6, so that the adsorption parts 81 of the first side pressing assembly 8 and the second side pressing assembly 9 can move with the heating mechanism 6. There is no need to set a moving part for the adsorption parts 81 of the first side pressing assembly 8 and the second side pressing assembly 9, thereby reducing the equipment cost.

[0132] Of course, in order to improve the independence and flexibility of the first side pressing component 8 and the second side pressing component 9, a moving part can also be provided for the adsorption member 81 of the first side pressing component 8 and the second side pressing component 9. Fig.14 As shown, it includes a moving part 83, an adsorption part 81 and a pressing tool 82, wherein the moving part 83 is arranged on one side of the rework station, the adsorption part 81 is connected to the driving end of the moving part, the moving part 83 is used to drive the adsorption part 81 to translate and rise and fall, and the pressing tool 82 is adsorbed on the adsorption part 81.

[0133] Optionally, the moving part 83 includes a lifting module 831 and a transverse module 832, wherein the lifting module 831 is used to drive the adsorption member 81 to lift, and the transverse module 832 is used to drive the adsorption member 81 to move transversely. Both the lifting module 831 and the transverse module 832 can adopt various existing linear drive modules, such as a cylinder drive module composed of a cylinder and a slide rail pair.

[0134] The adsorption member 81 may be, for example, an electromagnet adsorption member. The pressing tool 82 may be, for example, a steel plate tool on which a plurality of pressing pins are arranged.

[0135] like Figure 6 As shown, optionally, a second solder strip avoidance groove 21 for avoiding the first side solder strip 106 and the second side solder strip 107 is provided on the middle carrier 2, and the second solder strip avoidance groove 21 extends along the length direction of the rework station, and each second solder strip avoidance groove 21 is used to accommodate a first side solder strip 106 or a second side solder strip 107. A clamping assembly 22 for guiding the corresponding first side solder strip 106 or the second side solder strip 107 is provided in each second solder strip avoidance groove 21.

[0136] By arranging the second solder strip avoidance groove 21 on the intermediate supporting platform 2, the first side solder strip and the second side solder strip on the defective battery cell 101 are guided and avoided. On the one hand, it can prevent the first side solder strip and the second side solder strip on the defective battery cell from being pressed on the intermediate supporting platform by the defective battery cell, ensuring that when the first side supporting platform and the second side supporting platform move away from the intermediate supporting platform, the first side solder strip and the second side solder strip after desoldering with the defective battery cell can move smoothly relative to the defective battery cell. On the other hand, the first side solder strip and the second side solder strip can be guided and limited during their movement.

[0137] By arranging a clamping assembly 22 in the second solder strip avoidance groove 21, the first side solder strip and the second side solder strip are limited and guided, so that the first side solder strip and the second side solder strip always remain in the second solder strip avoidance groove 21 during the movement relative to the defective battery cell 101.

[0138] Optionally, the intermediate carrier 2 is further provided with a mounting groove 23 extending along the width direction of the rework station, and the mounting groove 23 runs through all the second solder strip avoidance grooves 21. The defective cell removal mechanism in the embodiment of the present application also includes a first clamping plate 24, a second clamping plate 25 and a clamping drive unit 26, wherein the first clamping plate 24 and the second clamping plate 25 are stacked up and down in the mounting groove 23, and a first clamping jaw 221 is provided at the position corresponding to each second solder strip avoidance groove 21 on the first clamping plate 24, and a second clamping jaw 222 matched with the first clamping jaw 221 is provided at the position corresponding to each second solder strip avoidance groove 21 on the second clamping plate 25, and each second clamping jaw 222 and the corresponding first clamping jaw 221 constitute a clamping assembly 22. The clamping drive part 26 is arranged below the middle supporting platform 2, and the clamping drive part 26 is transmission-connected with the first clamping plate 24 and the second clamping plate 25. The clamping drive part 26 is used to drive the first clamping plate 24 and the second clamping plate 25 to move in opposite directions in the mounting groove 23, so as to drive each clamping assembly 22 to close or open synchronously, and guide the first side welding strip 106 or the second side welding strip 107 when the clamping assembly 22 closes.

[0139] like Figures 7 to 10As shown, optionally, the clamping driving part 26 includes a first lifting driving member 261, a first connecting rod 262, a second lifting driving member 263 and a second connecting rod 264, wherein: the first connecting rod 262 is an L-shaped structure, one end of the first connecting rod 262 is connected to the driving end of the first lifting driving member 261, and the other end of the first connecting rod is connected to the first end of the first clamping plate 24, and the first end of the first clamping plate 24 is close to the first end of the installation groove 23. The second connecting rod 264 is an L-shaped structure, one end of the second connecting rod 264 is connected to the driving end of the second lifting driving member 263, and the other end of the second connecting rod 264 is connected to the second end of the second clamping plate 25, and the second end of the second clamping plate 25 is close to the second end of the installation groove 23. When the first lifting driving member 261 drives the first clamping plate 24 to move in the installation groove 23 via the first connecting rod 262, the second lifting driving member 263 drives the second clamping plate 25 to move in the opposite direction of the first clamping plate 24 in the installation groove 23 via the second connecting rod 264.

[0140] Optionally, a first waist hole is provided on one end of the first connecting rod 262 and the driving end of the first lifting driving member 261, and a first connecting shaft is provided on the other end, and the first connecting shaft is connected to the first waist hole and can move in the first waist hole. The other end of the first connecting rod 262 is fixedly connected to the first end of the first clamping plate 24, so that when the first lifting driving member 261 drives the first connecting rod 262 to rise, the first connecting rod 262 can rotate, thereby driving the first clamping plate 24 to translate in the installation groove 23. Similarly, a second waist hole is provided on one end of the second connecting rod 264 and the driving end of the second lifting driving member 263, and a second connecting shaft is provided on the other end, and the second connecting shaft is connected to the second waist hole and can move in the second waist hole. The other end of the second connecting rod 264 is fixedly connected to the second end of the second clamping plate 25, so that when the second lifting driving member 263 drives the second connecting rod 264 to rise, the second connecting rod 264 can rotate, thereby driving the second clamping plate 25 to translate in the installation groove 23. The first lifting drive member 261 and the second lifting drive member 263 can both be cylinders.

[0141] In order to achieve the sliding guide of the second clamping plate 25 and the first clamping plate 24, and prevent the second clamping plate 25 and the first clamping plate 24 from getting stuck during the reverse sliding process. Optionally, the first clamping plate 24 is provided with a first guide hole, and the second clamping plate 25 is provided with a second guide hole matched with the first guide hole, and the first guide hole and the second guide hole both extend along the width direction of the rework station, and the first clamping plate 24 and the second clamping plate 25 are slidably connected via the connecting pin 27 inserted into the first guide hole and the second guide hole.

[0142] like Figure 6As shown, optionally, the middle platform 2 is further provided with a first suction cup 28 located between adjacent second solder strip avoidance grooves 21, and the first suction cup 28 is used to absorb defective battery cells. The first side platform 1 is provided with a second suction cup at one end close to the middle platform 2, and the second suction cup is used to absorb the first side adjacent battery cells. The second side platform 3 is provided with a third suction cup at one end close to the middle platform 2, and the third suction cup is used to absorb the second side adjacent battery cells.

[0143] By setting a first suction cup 28 on the middle platform 2, the defective cell can be fixed on the middle platform 2 by suction. By setting a second suction cup on the first side platform 1, the first side adjacent cell is fixed on the first side platform 1 by suction. By setting a third suction cup on the second side platform 3, the second side adjacent cell is fixed on the second side platform 3 by suction. In this way, when the first side platform 1 and the second side platform 3 move away from the middle platform 2, it can be ensured that the first side adjacent cell and the second side adjacent cell are separated from the defective cell.

[0144] Optionally, a heating component is provided in the middle support platform 2, and the heating component is used to cooperate with the heating mechanism 6 to heat the defective battery cell, thereby shortening the softening time of the first side film strip and the second side film strip, and shortening the desoldering time of the first side solder strip, the second side solder strip and the defective battery cell. The heating component can be a heating rod, a heating wire, a thermocouple, etc.

[0145] Optionally, a heating component is also provided on one end of the first side platform 1 close to the middle platform 2 and one end of the second side platform 3 close to the middle platform 2. When the heating mechanism 6 heats the defective battery cell, the solder joints at the edges of the first side adjacent battery cell and the second side adjacent battery cell may also be melted by the heat. By providing a heating component at one end of the first side platform 1 close to the middle platform 2, when welding and replacing the battery cell, the heating component at one end of the first side platform 1 close to the middle platform 2 can heat the first side adjacent battery cell, so that the melted solder joints on the first side adjacent battery cell are re-welded. Similarly, by providing a heating component at one end of the second side platform 3 close to the middle platform 2, when welding and replacing the battery cell, the heating component at one end of the second side platform 3 close to the middle platform 2 can heat the second side adjacent battery cell, so that the melted solder joints on the second side adjacent battery cell are re-welded.

[0146] The present application also provides a defective battery cell removal method, which can automatically remove the defective battery cell and the film strips adhered to the edges on both sides thereof from the IBC battery string (referred to as the battery string), thereby improving the defective battery cell removal efficiency.

[0147] The defective battery cell removal method of the present application includes:

[0148] Step S1, heating the defective battery cell in the battery string with the back side facing downward, so that the first side welding strip and the second side welding strip on the back side of the defective battery cell are de-soldered from the defective battery cell, and the first side film strip and the second side film strip on the back side of the defective battery cell are softened, wherein the first side welding strip is welded to the defective battery cell and the back side of the battery cell adjacent to the first side of the defective battery cell, the second side welding strip is welded to the defective battery cell and the back side of the battery cell adjacent to the second side of the defective battery cell, the first side film strip is a film strip bonded to the first side edge of the defective battery cell, and the second side film strip is a film strip bonded to the second side edge of the defective battery cell;

[0149] Step S2, pressing the first side film strip against the back of the defective battery cell from below, and pressing against the first side edge of the defective battery cell from above; pressing the second side film strip against the back of the defective battery cell from below, and pressing against the second side edge of the defective battery cell from above;

[0150] 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 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;

[0151] Step S4, releasing the pressure on the first side film strip and the second side film strip, and releasing the pressure on the first side edge and the second side edge of the defective battery cell, and removing the defective battery cell with the first side film strip and the second side film strip from the battery string.

[0152] Clamp the defective battery cell and the first side film strip located at the first side edge of the defective battery cell from the upper and lower sides, clamp the defective battery cell and the second side film strip located at the second side edge of the defective battery cell from the upper and lower sides, heat the defective battery cell, so that the first side solder strip and the second side solder strip on the back side of the defective battery cell are de-soldered from the defective battery cell, and the first side film strip and the second side film strip at the two side edges of the defective battery cell are softened.

[0153] Next, the cells on both sides of the defective cell in the cell string are controlled to move away from the defective cell, 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 the first side welding strip and the second side welding strip on the back of the defective cell are both separated from the defective cell. Finally, the defective cell with the first side film strip and the second side film strip is removed from the middle carrier.

[0154] It can be seen that the defective battery cell removal method provided in the embodiment of 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.

[0155] Optionally, step S1 is implemented before step S2, that is, the defective battery cell is first heated to soften the first side film strip and the second side film strip, the first side welding strip and the second side welding strip are de-soldered from the defective battery cell, and then the defective battery cell and the first side film strip and the second side film strip thereon are clamped.

[0156] Step S2 is also implemented before step S1, that is, first clamping the defective battery cell and the first side film strip and the second side film strip thereon, and then heating the defective battery cell to soften the first side film strip and the second side film strip, and desoldering the first side welding strip and the second side welding strip from the defective battery cell.

[0157] Step S1 and step S2 can also be implemented simultaneously, that is, while clamping the defective battery cell and the first side film strip and the second side film strip thereon, the defective battery cell is heated to soften the first side film strip and the second side film strip, and the first side welding strip and the second side welding strip are de-soldered from the defective battery cell.

[0158] The above three implementation sequences of step S1 and step S2 can all be realized. When the battery cells located on both sides of the defective battery cell are controlled to move away from the defective battery cell, the first side film strip softened by heat is separated from the battery cell adjacent to the first side, the second side film strip softened by heat is separated from the battery cell adjacent to the second side, and the first side solder strip and the second side solder strip on the back side of the defective battery cell are both detached from the defective battery cell.

[0159] In the case where step S1 is performed before step S2, in step S2: in the process of pressing the first side film strip against the back of the defective cell from below and pressing against the first side edge of the defective cell from above, the first side edge of the defective cell bends downward, so that the first side film strip is partially or completely separated from the first side adjacent cell. In the process of pressing the second side film strip against the back of the defective cell from below and pressing against the second side edge of the defective cell from above, the second side edge of the defective cell bends downward, so that the second side film strip is partially or completely separated from the second side adjacent cell.

[0160] Since the first side film strip is partially or completely separated from the first side adjacent film strip and the second side film strip is partially or completely separated from the second side adjacent film strip during the clamping of the defective cell and the first side film strip, when all cells on the first side and the second side of the defective cell in the cell string move away from the defective cell, it can be ensured that the first side film strip is separated from the first side adjacent film strip and the second side film strip is separated from the second side adjacent film strip.

[0161] Optionally, before step S1 and step S2, the method for removing defective battery cells in the embodiment of the present application further includes: pressing against the middle part of the defective battery cell from above.

[0162] By pressing against the middle of the defective cell from above, the defective cell is flattened so that the defective cell can be closely attached to the middle carrier and adsorbed by the middle carrier. Finally, it is ensured that when the cells on both sides of the defective cell move away from the defective cell, the defective cell does not move with the first adjacent cell and the second adjacent cell.

[0163] The defective battery cell removal method in the embodiment of the present application can be implemented by the defective battery cell removal device in any of the previous embodiments. For further implementation details, please refer to the relevant description of the defective battery cell removal device in the previous embodiments, which will not be repeated here.

[0164] The present application also provides a repair device, which includes the defective battery cell rejection mechanism in any of the above embodiments.

[0165] After the defective battery cell is removed from the intermediate supporting platform 2, the transport mechanism is also used to transport the replacement battery cell with its back side facing downward to the intermediate supporting platform 2, and the first side replacement film strip and the second side replacement film strip are respectively adhered to the two side edges of the back side of the replacement battery cell.

[0166] The first side loading platform 1 is also configured to rise relative to the middle loading platform 2, so that a first insertion gap is generated between the first side adjacent battery cell and the first side welding strip. The second side loading platform 3 is also configured to rise relative to the middle loading platform 2, so that a second insertion gap is generated between the second side adjacent battery cell and the second side welding strip.

[0167] The first side loading platform 1 is also used to move back toward the middle loading platform 2 so that the first side replacement film strip is inserted into the first insertion gap. The second side loading platform 3 is also used to move back toward the middle loading platform 2 so that the second side replacement film strip is inserted into the second insertion gap.

[0168] The first side loading platform 1 is also used to descend and return to its original position relative to the middle loading platform 2, so that the first side replacement film strip inserted into the first insertion gap contacts the first side adjacent battery cell. The second side loading platform 3 is also used to descend and return to its original position relative to the middle loading platform 2, so that the second side replacement film strip inserted into the second insertion gap contacts the second side adjacent battery cell.

[0169] The heating mechanism 6 is also used to heat the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is adhered to the back side of the battery cell adjacent to the first side, and the second side replacement film strip is adhered to the back side of the battery cell adjacent to the second side.

[0170] In order to enable those skilled in the art to more clearly understand the working process of the defective battery cell rejection mechanism in the embodiment of the present application, the following will continue to combine Figures 1 to 3, the working process of the rework device in the embodiment of the present application is described in detail.

[0171] First, the defective cell 101 and the first side film strip 103 and the second side film strip 104 thereon are disassembled from the battery string by the defective cell rejection mechanism, and the disassembled defective cell 101 with the first side film strip 103 and the second side film strip 104 is removed from the middle carrier 2. The specific disassembly process of the defective cell 101 and the first side film strip 103 and the second side film strip 104 thereon has been described in detail above, so it will not be repeated here.

[0172] Next, the replacement battery cell is transported to the middle loading platform 2 with the back side facing downward by the transport mechanism.

[0173] Next, the first side loading platform 1 is controlled to rise relative to the middle loading platform 2, so that a first insertion gap is generated between the first side adjacent battery cell 102 and the first side welding strip. Simultaneously, the second side loading platform 3 is controlled to rise relative to the middle loading platform 2, so that a second insertion gap is generated between the second side adjacent battery cell 104 and the second side welding strip.

[0174] Next, the first side loading platform 1 is controlled to move back toward the middle loading platform 2 so that the first side replacement film strip is inserted into the first insertion gap. Simultaneously, the second side loading platform 3 is controlled to move back toward the middle loading platform 2 so that the second side replacement film strip is inserted into the second insertion gap.

[0175] Next, the first side loading platform 1 is controlled to descend relative to the middle loading platform 2, so that the first side replacement film strip inserted into the first insertion gap contacts the first side adjacent battery cell 102. Simultaneously, the second side loading platform 3 is controlled to descend relative to the middle loading platform 2, so that the second side replacement film strip inserted into the second insertion gap contacts the second side adjacent battery cell 104.

[0176] Finally, the heating mechanism 6 is controlled to heat the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is adhered to the back side of the battery cell adjacent to the first side, and the second side replacement film strip is adhered to the back side of the battery cell adjacent to the second side.

[0177] 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.

[0178] like Figures 8 to 9As shown, optionally, each second solder strip avoidance groove 21 of the intermediate carrier 2 is provided with a lifting hole that penetrates the intermediate carrier 2. The defective battery cell rejection mechanism also includes a solder strip lifting assembly 29, which includes a second lifting drive unit 291, a pin mounting plate 292, and a plurality of pins 293, wherein: the pin mounting plate 292 is connected to the driving end of the second lifting drive unit 291, and a plurality of pins 293 are mounted on the pin mounting plate 292 and correspond to the lifting holes one by one, and each pin 293 is inserted into the corresponding lifting hole. The second lifting drive unit 291 is used to drive the pin mounting plate 292 to rise, so that the upper end of each pin 293 is upwardly inserted into the corresponding second solder strip avoidance groove 21, so as to press the first side solder strip or the second side solder strip located in the second solder strip avoidance groove 21 against the back of the replacement battery cell.

[0179] By lifting the welding strip lifting assembly 29, the first side welding strip and the second side welding strip can be pressed against the back of the replacement battery cell before welding, ultimately ensuring that the first side welding strip and the second side welding strip can be firmly welded to the back of the replacement battery cell.

[0180] In the case where the middle pressing component 7 is provided at the bottom of the heating mechanism 6, when the welding strip lifting component 29 presses the first side welding strip and the second side welding strip against the back of the replacement battery cell, the middle pressing component 7 is driven by the heating mechanism 6 to descend, thereby pressing the replacement battery cell from above. The heating mechanism 6 then heats the replacement battery cell, so that the first side welding strip and the second side welding strip are welded to the back of the replacement battery cell, and the first side replacement film strip is bonded to the back of the battery cell adjacent to the first side, and the second side replacement film strip is bonded to the back of the battery cell adjacent to the second side.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] The present application also provides a repair method, which includes:

[0185] The defective battery cells are removed from the battery string by the defective battery cell removal method provided in any of the above embodiments. The specific removal process of the defective battery cells has been described in detail in the above embodiments and will not be repeated here.

[0186] Step S5, carrying the replacement battery cell with its back side facing downward to the position vacated after the defective battery cell is removed, wherein the first side replacement film strip and the second side replacement film strip are respectively bonded to the two side edges of the back side of the replacement battery cell;

[0187] Step S6, controlling all the cells on the first side of the defective cell in the cell string to rise relative to the replacement cell, so that a first insertion gap is generated between the adjacent cells on the first side and the first side welding strip; controlling all the cells on the second side of the defective cell in the cell string to rise relative to the replacement cell, so that a second insertion gap is generated between the adjacent cells on the second side and the second side welding strip;

[0188] Step S7, controlling all the cells on the first side of the defective cell in the cell string to move toward the replacement cell, so that the first-side replacement film strip is inserted into the first insertion gap; controlling all the cells on the second side of the defective cell in the cell string to move toward the replacement cell, so that the second-side replacement film strip is inserted into the second insertion gap;

[0189] Step S8, controlling all the battery cells on the first side of the defective battery cell in the battery string to descend and return to their positions, so that the first side replacement film strip inserted into the first insertion gap contacts the first side adjacent battery cell; controlling all the battery cells on the second side of the defective battery cell in the battery string to descend and return to their positions, so that the second side replacement film strip inserted into the second insertion gap contacts the second side adjacent battery cell;

[0190] Step S9, heating the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is adhered to the back side of the battery cell adjacent to the first side, and the second side replacement film strip is adhered to the back side of the battery cell adjacent to the second side.

[0191] The repair method in the embodiment of the present application realizes the removal of defective battery cells and the film strips bonded to them from the IBC battery string at the same time, and connects the replacement battery cells bonded with the first side replacement film strips and the second side replacement film strips to the positions vacated after the defective battery cells are removed, thereby realizing the automatic repair of the IBC battery string with film strips.

[0192] Optionally, after step S8 and before step S9, the rework method in the embodiment of the present application further includes:

[0193] The first side welding strip and the second side welding strip located below the replacement battery cell are lifted upward so that the first side welding strip and the second side welding strip are closely attached to the back side of the replacement battery cell.

[0194] By lifting the first side welding strip and the second side welding strip upward, the first side welding strip and the second side welding strip can be pressed against the back side of the replacement battery cell, ultimately ensuring that the first side welding strip and the second side welding strip can be firmly welded to the back side of the replacement battery cell.

[0195] The repair method in the embodiment of the present application can be implemented by the battery string repair equipment in any of the previous embodiments. For further implementation details, please refer to the relevant description of the battery string repair equipment in the previous embodiments, which will not be repeated here.

[0196] The present application is described in sufficient detail above with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, rather than by the above description in the embodiments.

Claims

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

2. The defective cell rejection mechanism according to claim 1, characterized in that: The first holding mechanism comprises a first side film strip leaning component and a first side film strip pressing component, wherein the first side film strip leaning component is located between the first side bearing platform and the middle bearing platform, the first side film strip leaning component is used to lean the first side film strip against the back side of the defective battery sheet from below, the first side film strip pressing component is arranged on the heating mechanism, and the first side film strip pressing component is used to press against the first side edge of the defective battery sheet from above to cooperate with the first side film strip leaning component to clamp the defective battery sheet and the first side film strip; The second holding mechanism includes a second side film strip leaning assembly and a second side film strip pressing assembly, wherein the second side film strip leaning assembly is located between the second side supporting platform and the middle supporting platform, the second side film strip leaning assembly is used to press the second side film strip against the back side of the defective battery cell from below, the second side film strip pressing assembly is arranged on the heating mechanism, and the second side film strip pressing assembly is used to press against the second side edge of the defective battery cell from above to cooperate with the second side film strip leaning assembly to clamp the defective battery cell and the second side film strip.

3. The defective cell rejection mechanism according to claim 2, characterized in that: The second side film strip leaning assembly has the same structure as the first side film strip leaning assembly, and the first side film strip leaning assembly includes a first lifting driving part and a leaning plate, wherein the leaning plate is connected to the driving end of the first lifting driving part, and the first lifting driving part is used to drive the leaning plate to rise and fall; When the first lifting driving unit drives the supporting plate to rise to a high position, the supporting plate presses the first side film strip on the defective battery cell against the back side of the defective battery cell; A first welding strip avoiding groove for avoiding the first side welding strip is provided on the upper end surface of the top supporting plate.

4. The defective cell rejection mechanism according to claim 3, characterized in that: The upper end surface of the supporting plate is a first plane parallel to the horizontal plane; The second side film strip pressing assembly has the same structure as the first side film strip pressing assembly. The first side film strip pressing assembly includes a first pressing needle row. The first pressing needle row includes a plurality of first pressing needles arranged at intervals along the width direction of the rework table. The lower end surface of each first pressing needle is located in a second plane parallel to the horizontal plane.

5. The defective cell rejection mechanism according to claim 3, characterized in that: The upper end surface of the supporting plate is a first arc-shaped surface inclined downward toward the first side bearing platform; The second side film strip pressing assembly has the same structure as the first side film strip pressing assembly. The first side film strip pressing assembly includes a pressing plate extending along the width direction of the rework station, and the lower end surface of the pressing plate is a second arc surface that cooperates with the first arc surface.

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

7. The defective battery cell rejection mechanism according to claim 6, characterized in that: The intermediate pressing assembly includes at least two second pressing needle rows arranged at intervals along the length direction of the rework table, and each of the second pressing needle rows includes a plurality of second pressing needles arranged at intervals along the width direction of the rework table.

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

9. The defective battery cell rejection mechanism according to claim 8, 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, wherein 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.

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

11. The defective battery cell rejection mechanism according to claim 10, characterized in that: The intermediate loading platform is also provided with a mounting groove extending along the width direction of the rework platform, and the mounting groove runs through all the second welding strip avoidance grooves; The defective battery cell rejection mechanism further includes a first clamping plate, a second clamping plate and a clamping drive unit, wherein the first clamping plate and the second clamping plate are stacked up and down in the mounting groove, a first clamping claw is arranged at a position of the first clamping plate corresponding to each of the second solder strip avoidance grooves, and a second clamping claw matched with the first clamping claw is arranged at a position of the second clamping plate corresponding to each of the second solder strip avoidance grooves, and each of the second clamping claws and the corresponding first clamping claw constitute a clamping assembly; The clamping drive unit is arranged below the intermediate supporting platform, and the clamping drive unit is transmission-connected with the first clamping plate and the second clamping plate. The clamping drive unit is used to drive the first clamping plate and the second clamping plate to move in opposite directions in the mounting groove, so as to drive each of the clamping components to close or open synchronously, and guide the first side welding strip or the second side welding strip when the clamping components close together.

12. The defective battery cell rejection mechanism according to claim 11, characterized in that: The clamping drive unit includes a first lifting drive member, a first connecting rod, a second lifting drive member and a second connecting rod, wherein: The first connecting rod is an L-shaped structure, one end of the first connecting rod is connected to the driving end of the first lifting driving member, and the other end of the first connecting rod is connected to the first end of the first clamping plate, and the first end of the first clamping plate is close to the first end of the mounting groove; The second connecting rod is an L-shaped structure, one end of the second connecting rod is connected to the driving end of the second lifting driving member, the other end of the second connecting rod is connected to the second end of the second clamping plate, and the second end of the second clamping plate is close to the second end of the mounting groove; When the first lifting driving member drives the first clamping plate to move in the installation slot via the first connecting rod, the second lifting driving member drives the second clamping plate to move in the installation slot in the opposite direction to the first clamping plate via the second connecting rod.

13. The defective battery cell rejection mechanism according to claim 11, characterized in that: A first guide hole is provided on the first clamping plate, and a second guide hole matching the first guide hole is provided on the second clamping plate. The first guide hole and the second guide hole both extend along the width direction of the rework table, and the first clamping plate and the second clamping plate are slidably connected via connecting pins passing through the first guide hole and the second guide hole.

14. The defective battery cell rejection mechanism according to claim 10, characterized in that: The intermediate carrying platform is also provided with a first suction cup located between adjacent second welding strip avoidance grooves, and the first suction cup is used to absorb the defective battery cell; A second suction cup is provided at one end of the first side bearing platform close to the middle bearing platform, and the second suction cup is used to absorb the adjacent battery sheet on the first side; A third suction cup is disposed at one end of the second side support platform close to the middle support platform, and the third suction cup is used for adsorbing the adjacent battery cell on the second side.

15. 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.

16. A rework device, characterized in that: The repair device comprises a defective cell removal mechanism according to any one of claims 1 to 15; After the defective battery cell is removed from the intermediate loading platform, the transport mechanism is further used to transport the replacement battery cell with its back side facing downward to the intermediate loading platform, and the first side replacement film strip and the second side replacement film strip are respectively bonded to the two side edges of the back side of the replacement battery cell; The first side loading platform is further configured to rise relative to the middle loading platform, so that a first insertion gap is generated between the first side adjacent battery cell and the first side welding strip; the second side loading platform is further configured to rise relative to the middle loading platform, so that a second insertion gap is generated between the second side adjacent battery cell and the second side welding strip; The first side loading platform is also used to move toward the middle loading platform to return to its original position, so that the first side replacement film strip is inserted into the first insertion gap; the second side loading platform is also used to move toward the middle loading platform to return to its original position, so that the second side replacement film strip is inserted into the second insertion gap; The first side loading platform is further used to descend and return to its original position relative to the middle loading platform, so that the first side replacement film strip inserted into the first insertion gap contacts the first side adjacent battery slice; the second side loading platform is further used to descend and return to its original position relative to the middle loading platform, so that the second side replacement film strip inserted into the second insertion gap contacts the second side adjacent battery slice; The heating mechanism is also used to heat the replacement battery cell so that the first side welding strip and the second side welding strip are welded to the back side of the replacement battery cell, and the first side replacement film strip is adhered to the back side of the adjacent battery cell on the first side, and the second side replacement film strip is adhered to the back side of the adjacent battery cell on the second side.

17. The repair device according to claim 16, characterized in that: The defective battery cell rejection mechanism is the defective battery cell rejection mechanism according to claim 10; Each of the second welding strip avoidance grooves is provided with a lifting hole penetrating through the middle bearing platform; The defective cell rejection mechanism further includes a solder strip lifting assembly, which includes a second lifting drive unit, a pin mounting plate and a plurality of pins, wherein: The ejector mounting plate is connected to the driving end of the second ejection driving part, a plurality of ejectors are mounted on the ejector mounting plate and correspond to the ejection holes one by one, and each ejector is inserted into the corresponding ejection hole; The second lifting drive unit is used to drive the ejector mounting plate to rise so that the upper end of each ejector is inserted upward into the corresponding second solder strip avoidance groove to press the first side solder strip or the second side solder strip located in the second solder strip avoidance groove against the back side of the replacement battery cell.

18. The repair device according to claim 16, characterized in that: The repair device also includes a replacement battery cell supply mechanism, which is used to adhere the first side replacement film strip and the second side replacement film strip to the two side edges of the back side of the battery cell to obtain the replacement battery cell.

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