A welding strip clamping device and a battery string repair method

Abstract

The application provides a welding strip clamping device and a battery string repair method. The welding strip clamping device comprises a mounting bracket, a first chuck mounting seat, a second chuck mounting seat, a clamping driving mechanism, a pair of first chucks and a pair of second chucks. The first chuck mounting seat and the second chuck mounting seat are both slidingly mounted on the mounting bracket, and the clamping driving mechanism is used for driving the first chuck mounting seat and the second chuck mounting seat to move towards the middle or move apart. The first chuck is arranged on the first chuck mounting seat, and the second chuck is arranged on the second chuck mounting seat. The first chuck and / or the second chuck are configured to be able to float up and down relative to the corresponding chuck mounting seat. In the process of clamping the welding strip downward, the first chuck and the second chuck of the welding strip clamping device can realize self-adaptive adjustment of the relative position in the height direction, ensure effective clamping of the welding strip, and finally ensure the quality of the subsequent lap welding.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing, specifically to a welding strip clamping device and a method for reworking battery strings. Background Technology

[0002] One method for repairing battery strings is to cut the solder strip between the defective battery cell and its adjacent battery cell, then replace the defective battery cell with a replacement battery cell that has solder strips on it, and then lap-weld the solder strips on the replacement battery cell to the solder strips on the adjacent battery cell to complete the repair.

[0003] When performing lap welding, the welding strip on the replacement cell needs to be clamped together with the welding strip on the adjacent cell. In existing welding strip clamping devices, the two clamps used to clamp the welding strip are fixed. Due to assembly or manufacturing errors, the two clamps may not be able to accurately fit together when clamping the welding strip, which affects the quality of subsequent lap welding. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a welding strip clamping device, which adopts the following technical solution:

[0005] A welding strip clamping device includes a mounting bracket, a first clamp mounting base, a second clamp mounting base, a clamping drive mechanism, and at least one pair of first clamps and second clamps, wherein:

[0006] The first chuck mounting base and the second chuck mounting base are both slidably mounted on the mounting bracket and are both connected to the drive end of the clamping drive mechanism. The clamping drive mechanism is used to drive the first chuck mounting base and the second chuck mounting base to move closer to the middle or to separate to the sides.

[0007] A first chuck is disposed on a first chuck mounting base, and a second chuck is disposed on a second chuck mounting base, wherein the first chuck is configured to float up and down relative to the first chuck mounting base, and / or the second chuck is configured to float up and down relative to the second chuck mounting base;

[0008] When the clamping drive mechanism drives the first chuck mounting base and the second chuck mounting base to move closer together, the first chuck and the corresponding second chuck clamp together to clamp the welding strip;

[0009] When the clamping drive mechanism drives the first chuck mounting base and the second chuck mounting base to separate to both sides, the first chuck and the corresponding second chuck open to release the welding strip.

[0010] The welding strip clamping device provided by this invention has at least one of a first clamp and a second clamp that can be vertically and flexibly connected to a corresponding clamp mounting base. This configuration allows for adaptive adjustment of the relative height of the first and second clamps during the descent to clamp the welding strip. Thus, even with assembly or manufacturing errors in the first and second clamps, accurate fit can be achieved to effectively clamp the welding strip, ultimately ensuring the quality of subsequent lap welding.

[0011] In some embodiments, the welding strip clamping device includes a set of first clamps and second clamps; the first clamps are buoyantly connected to a first clamp mounting base via a first floating component; and / or the second clamps are buoyantly connected to a second clamp mounting base via a second floating component.

[0012] The welding strip clamping device is equipped with only one set of first clamps and second clamps, so that the welding strip clamping device only clamps and overlaps one pair of first welding strips and second welding strips at a time, making rework more flexible and avoiding mutual interference when clamping different pairs of welding strips.

[0013] In some embodiments, the first floating assembly includes a first spring limiting plate, a first guide post, and a first spring, wherein: the first spring limiting plate is fixedly installed above the first chuck mounting seat; the upper end of the first guide post is slidably inserted into the first spring limiting plate; the lower end of the first guide post is slidably inserted into the first chuck mounting seat and extends downward through the first chuck mounting seat; the first spring is fitted onto the first guide post; the upper end of the first spring abuts against the first spring limiting plate; and the lower end of the first spring abuts against the first chuck mounting seat; the first chuck is connected to the lower end of the first guide post.

[0014] A simple first floating assembly is provided, which achieves a floating connection between the first chuck and the first chuck mounting base through the extension and retraction adjustment of the first spring.

[0015] In some embodiments, the second floating assembly includes a second spring limiting plate, a second guide post, and a second spring, wherein: the second spring limiting plate is fixedly installed above the second chuck mounting base; the upper end of the second guide post is slidably inserted into the second spring limiting plate; the lower end of the second guide post is slidably inserted into the second chuck mounting base and extends downward through the second chuck mounting base; the second spring is fitted onto the second guide post; the upper end of the second spring abuts against the second spring limiting plate; and the lower end of the second spring abuts against the second chuck mounting base; the second chuck is connected to the lower end of the second guide post.

[0016] A simple second floating assembly is provided, which achieves a floating connection between the second chuck and the second chuck mounting base through the extension and retraction adjustment of the second spring.

[0017] In some embodiments, the welding strip clamping device further includes a first adaptive adjustment component, which includes a first spring seat and a third spring. The first spring seat is fixedly mounted on a second chuck mounting base. The middle part of the second chuck is fixedly connected to the lower end of the second guide post. The first end of the second chuck is used to cooperate with the corresponding first chuck to clamp the welding strip. The second end of the second chuck is press-fitted between itself and the first spring seat with a third spring.

[0018] By setting the first adaptive adjustment component, the first end of the second chuck can be elastically pressed against the first end of the first chuck, so that the second chuck can adaptively rotate according to the thickness of the part of the welding strip being clamped, ensuring that the first end of the second chuck and the first end of the first chuck can clamp welding strips of different thicknesses, as well as welding strips with foreign objects on them.

[0019] In some embodiments, the welding strip clamping device includes at least two sets of first clamps and second clamps, wherein: each first clamp is arranged side by side at intervals and is connected to the first clamp mounting base in a way that allows it to float up and down via a third floating component; and / or each second clamp is arranged side by side at intervals and is connected to the second clamp mounting base in a way that allows it to float up and down via a fourth floating component.

[0020] By setting multiple sets of first and second clamps, the welding strip clamping device can simultaneously clamp multiple pairs of first and second welding strips, enabling the welding device to synchronously or continuously weld the clamped pairs of first and second welding strips, thereby improving the efficiency of lap welding.

[0021] In some embodiments, the third floating component includes a lifting seat, a third guide post, and a fourth spring, wherein: the upper end of the third guide post is fixedly connected to the first chuck mounting seat, the lower end of the third guide post is slidably connected to the lifting seat, the fourth spring is fitted onto the third guide post, the upper end of the fourth spring abuts against the first chuck mounting seat, and the lower end of the fourth spring abuts against the lifting seat; each first chuck is mounted together on the lifting seat, and the clamping end of each first chuck extends downward out of the lifting seat.

[0022] A simple third floating assembly is provided, which achieves a floating connection between the first chuck and the first chuck mounting base through the extension and retraction adjustment of the fourth spring.

[0023] In some embodiments, the welding strip clamping device further includes a clamping plate, with each first clamp integrally formed at the lower end of the clamping plate, and the clamping plate is fixedly mounted on the lifting seat.

[0024] By integrally molding each first chuck onto the lower end of the clamping plate, the processing and installation of the first chuck becomes more convenient.

[0025] In some embodiments, the fourth floating assembly includes a third spring limiting plate, fourth guide posts corresponding to the second clamps, and fifth springs, wherein: the third spring limiting plate is fixedly installed above the second clamp mounting base; the upper ends of each fourth guide post are slidably inserted into the third spring limiting plate; the lower ends of each fourth guide post are slidably inserted into the second clamp mounting base and extend downward through the second clamp mounting base; each fifth spring is fitted onto the corresponding fourth guide post; the upper end of each fifth spring abuts against the third spring limiting plate; and the lower end of each fifth spring abuts against the second clamp mounting base; each second clamp is connected to the lower end of the corresponding fourth guide post.

[0026] A simple fourth floating assembly is provided, which achieves a floating connection between the second chuck and the second chuck mounting base through the extension and retraction adjustment of the fifth spring.

[0027] In some embodiments, the welding strip clamping device further includes a second adaptive adjustment component corresponding to each of the second clamps. The second adaptive adjustment component includes a second spring seat and a sixth spring. The second spring seat is fixedly mounted on the second clamp mounting base. The middle part of each second clamp is fixedly connected to the lower end of the corresponding fourth guide post. The first end of the second clamp is used to cooperate with the corresponding first clamp to clamp the welding strip. The second end of the second clamp is press-fitted between the second end of the second clamp and the corresponding second spring seat.

[0028] By setting a second adaptive adjustment component, the first end of the second chuck can be elastically pressed against the first end of the first chuck, so that the second chuck can adaptively rotate according to the thickness of the part of the welding strip being clamped, ensuring that the first end of the second chuck and the first end of the first chuck can clamp welding strips of different thicknesses, as well as welding strips with foreign objects on them.

[0029] In some embodiments, the clamping drive mechanism includes a motor, a cam, a first cam follower, a second cam follower, and a seventh spring, wherein: the motor is mounted on a mounting bracket, and the cam is connected to the drive shaft of the motor; the first cam follower is connected to a first chuck mounting seat and is located on a first side of the cam, and the second cam follower is connected to a second chuck mounting seat and is located on a second side of the cam; the first end of the seventh spring is connected to the first chuck mounting seat, and the second end of the seventh spring is connected to the second chuck mounting seat, and the seventh spring is used to pull the first chuck mounting seat and the second chuck mounting seat towards the center, so that the first cam follower and the second cam follower press against the cam; when the motor drives the cam to rotate, it causes the first cam follower and the second cam follower to move closer or further away, thereby causing the first chuck mounting seat and the second chuck mounting seat to move closer to the center or separate to both sides.

[0030] A simple clamping drive mechanism is provided, which can drive the first chuck mounting base and the second chuck mounting base to move closer together or separate to the sides using only one motor.

[0031] In some embodiments, the bottom surface of the clamping end of the first chuck is a stepped surface, which includes a first bottom surface, a second bottom surface, and a side surface, wherein the first bottom surface is lower than the second bottom surface, and the side surface is located between the first bottom surface and the second bottom surface; the clamping end of the second chuck has a bottom surface and a side end surface, the side end surface of the clamping end of the second chuck is opposite to the side surface of the first chuck, and the side end surface of the clamping end of the second chuck and the side surface of the first chuck move closer or further away from each other as the first chuck mounting base and the second chuck mounting base move relative to each other, so as to clamp or release the welding strip.

[0032] By configuring the clamping ends of the first and second chucks, the following can be achieved: when the first and second chucks descend, the first bottom surface of the first chuck and / or the bottom surface of the clamping end of the second chuck can float upwards after contacting the battery cell, eventually reaching the same height. The welding strip to be clamped enters between the side face of the first chuck and the side end face of the second chuck. Subsequently, the first and second chucks move towards the middle, thereby smoothly clamping the welding strip between the side face of the first chuck and the side end face of the second chuck.

[0033] This invention also provides a method for repairing battery strings, the technical solution of which is as follows:

[0034] A method for repairing battery strings includes:

[0035] Cut the solder strip between the defective cell and the adjacent cell in the battery string, and remove the defective cell to obtain a disassembled battery string with a disassembled solder strip.

[0036] Replacement cells are loaded into the empty space after the defective cells are removed. The replacement cells have replacement solder strips, which correspond one-to-one with the solder strips in the solder strips in the disassembled end solder strips.

[0037] The welding strips in the replacement welding strip group are clamped and overlapped together with the corresponding welding strips in the dismantled welding strip group by a welding strip clamping device, and the overlapped welding strips are connected by a connecting device. The welding strip clamping device is any of the welding strip clamping devices described above.

[0038] Because the welding strip clamping device provided by the present invention allows for adaptive adjustment of the relative positions of the first clamp and / or the second clamp during the clamping process, using the welding strip clamping device provided by the present invention to clamp each welding strip in the replacement welding strip group and the corresponding welding strip in the dismantling welding strip group can ensure that each welding strip in the replacement welding strip group and the corresponding welding strip in the dismantling welding strip group can be successfully clamped and overlapped together, ultimately ensuring the quality of rework.

[0039] In some embodiments, clamping and overlapping each solder strip in the replacement solder strip group with the corresponding solder strip in the disassembly solder strip group using a solder strip clamping device includes: clamping and overlapping each solder strip in the replacement solder strip group with the corresponding solder strip in the disassembly solder strip group one by one using a solder strip clamping device; or clamping and overlapping each solder strip in the replacement solder strip group with the corresponding solder strip in the disassembly solder strip group simultaneously or alternately using multiple solder strip clamping devices.

[0040] Using a single solder strip clamping device to clamp and overlap each solder strip in the replacement solder strip group with the corresponding solder strip in the dismantled solder strip group one by one allows for flexible rework and low rework costs. Using multiple solder strip clamping devices to simultaneously or alternately clamp and overlap each solder strip in the replacement solder strip group with the corresponding solder strip in the dismantled solder strip group improves clamping efficiency. The connecting device can continuously or synchronously connect the clamped and overlapped solder strips, further enhancing rework efficiency.

[0041] In some embodiments, connecting the overlapping welding strips by a connecting device includes: the connecting device being a welding device, which welds the overlapping welding strips together; or, the connecting device being an adhesive applicator, which adhesively bonds the overlapping welding strips together; or, the connecting device including a welding device and an adhesive applicator, which welds the overlapping welding strips together and applies adhesive to the overlap of the welding strips to bond the welded welding strips together.

[0042] The connection device includes a welding device and an adhesive application device. The welding device welds the two overlapping welding strips, and the adhesive application device bonds the two overlapping welding strips, thus achieving a double connection between the two welding strips. In this way, even if the solder at the connection point of the welding strips reaches a molten or semi-molten state due to the internal temperature rise of the photovoltaic module during subsequent use, the welding strips will not separate from each other because they are still bonded by the adhesive.

[0043] This invention also provides another method for repairing battery strings, the technical solution of which is as follows:

[0044] A method for repairing battery strings includes:

[0045] Desolder the exposed white solder strips that deviate from the main grid lines in the battery string from the corresponding battery cell;

[0046] The exposed white solder strip is held by a solder strip clamping device, and the exposed white solder strip is aligned with the main grid line by the solder strip clamping device; the exposed white solder strip is then soldered onto the main grid line.

[0047] Because the welding strip clamping device provided by the present invention allows for adaptive adjustment of the relative positions of the first clamp and / or the second clamp during the clamping process, it can ensure that the exposed welding strip can be successfully clamped to align the exposed welding strip on the main grid line, thereby enabling the exposed welding strip to be accurately welded onto the main grid line and improving the quality of rework.

[0048] In some embodiments, before welding the exposed solder strip onto the main grid line, the battery string rework method further includes: pressing the exposed solder strip onto the main grid line using a pressure pin, wherein the pressure pin and the solder strip clamping device are located on both sides of the exposed solder strip to be welded position.

[0049] By pressing the exposed solder strip onto the main grid line with a pressure pin, it can be ensured that the exposed solder strip is firmly welded to the main grid line, preventing incomplete soldering and further improving the quality of rework. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the welding strip clamping device in the first embodiment of the present invention from a first perspective.

[0051] Figure 2 This is a schematic diagram of the welding strip clamping device in the first embodiment of the present invention from a second perspective;

[0052] Figure 3 for Figure 2 AA section view;

[0053] Figure 4 for Figure 2 BB section view;

[0054] Figure 5 This is a schematic diagram of the welding strip clamping device in the first embodiment of the present invention from a third perspective;

[0055] Figure 6 This is a schematic diagram of the welding strip clamping device in the first embodiment of the present invention from a fourth perspective;

[0056] Figure 7 This is a partial schematic diagram of the first and second clamps in the first embodiment of the present invention;

[0057] Figure 8 This is a schematic diagram of the welding strip clamping device in the second embodiment of the present invention from a first perspective.

[0058] Figure 9 This is a schematic diagram of the welding strip clamping device in the second embodiment of the present invention from a second perspective;

[0059] Figure 10 This is a schematic diagram of the welding strip clamping device in the second embodiment of the present invention from a third perspective;

[0060] Figure 11 for Figure 10 CC section view;

[0061] Figure 12 This is a schematic diagram of the welding strip clamping device in the second embodiment of the present invention from a fourth perspective;

[0062] Figure 13 This is a schematic diagram of the welding strip clamping device in the second embodiment of the present invention from a fifth perspective.

[0063] Figure 14 This is a schematic diagram of the clamping and overlapping of two welding strips by the welding strip clamping device of the present invention.

[0064] Figure 15 This is a schematic diagram of the welding strip clamping device in the first embodiment clamping the exposed white welding strip;

[0065] Figures 1 to 15 Includes:

[0066] Mounting bracket 1;

[0067] First clamp mounting base 2;

[0068] Second clamp mounting base 3;

[0069] Clamping drive mechanism 4: motor 41, cam 42, first cam follower 43, second cam follower 44, first transmission plate 45, second transmission plate 46, seventh spring 47;

[0070] First clamp 5: First bottom surface 51, second bottom surface 52, side surface 53;

[0071] Second clamp 6: bottom surface 61, side surface 62;

[0072] First floating component 7: First spring limiting plate 71, first guide post 72, first spring 73;

[0073] Second floating component 8: Second spring limiting plate 81, second guide post 82, second spring 83;

[0074] First adaptive adjustment component 9: First spring seat 91, third spring 92;

[0075] Third floating component 10: lifting seat 101, fourth spring 102;

[0076] Fourth floating component 11: Third spring limiting plate 111, fourth guide post 112, fifth spring 113;

[0077] Clamping plate 12;

[0078] Second adaptive adjustment component 13: Second spring seat 131, sixth spring 132;

[0079] First slide rail 14;

[0080] Second slide rail 15;

[0081] First welding strip 100, second welding strip 200, exposed white welding strip 300, pressure pin 400;

[0082] Area A to be connected, position B to be welded. Detailed Implementation

[0083] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0084] During the battery string repair process, when performing lap welding, the welding strip on the replacement cell needs to be clamped together with the welding strip on the adjacent cell. In existing welding strip clamping devices, the two clamps used to clamp the welding strip are fixed. Due to assembly or manufacturing errors, the two clamps may not be able to accurately fit together when clamping the welding strip, which affects the quality of subsequent lap welding.

[0085] To address the aforementioned problems of existing welding strip clamping devices, this invention provides a welding strip clamping device in which two paired clamps can automatically and accurately engage to effectively clamp two welding strips to be overlapped, thereby ensuring the quality of subsequent overlap welding.

[0086] The welding strip clamping device provided by the present invention will be described exemplarily below through two embodiments.

[0087] First Embodiment

[0088] like Figure 1 As shown, the welding strip clamping device in this embodiment includes a mounting bracket 1, a first chuck mounting base 2, a second chuck mounting base 3, a clamping drive mechanism 4, and a pair of first chucks 5 and second chucks 6, wherein:

[0089] The first chuck mounting base 2 and the second chuck mounting base 3 are both slidably mounted on the mounting bracket 1 and are both connected to the driving end of the clamping drive mechanism 4. The clamping drive mechanism 4 is used to drive the first chuck mounting base 2 and the second chuck mounting base 3 to move closer to the middle or to separate to both sides.

[0090] A first chuck 5 is disposed on a first chuck mounting base 2, and a second chuck 6 is disposed on a second chuck mounting base 3. The first chuck 5 is configured to float vertically relative to the first chuck mounting base 2, and / or the second chuck 6 is configured to float vertically relative to the second chuck mounting base 3. That is, at least one of the first chuck 5 and the second chuck 6 is configured to float vertically relative to its corresponding chuck mounting base.

[0091] When the clamping drive mechanism 4 drives the first chuck mounting base 2 and the second chuck mounting base 3 to move closer to the middle, the first chuck 5 and the second chuck 6 clamp together to tighten the welding strip.

[0092] When the clamping drive mechanism 4 drives the first chuck mounting base 2 and the second chuck mounting base 3 to separate to both sides, the first chuck 5 and the second chuck 6 open to release the welding strip.

[0093] The solder strip clamping device in this embodiment is suitable for clamping a set of first and second solder strips on the battery cell. The specific process is as follows:

[0094] In the initial state, the first clamp 5 and the corresponding second clamp 6 are in the open state.

[0095] Adjust the position of the mounting bracket 1 so that the clamping gap between the first clamp 5 and the second clamp 6 is aligned with the first and second welding strips to be overlapped.

[0096] Next, the mounting bracket 1 is lowered. Since at least one of the first clamp 5 and the second clamp 6 can be connected to the corresponding clamp mounting base by floating up and down, as the mounting bracket 1 descends, the lower ends of the first clamp 5 and the second clamp 6 eventually abut against the battery cell, that is, ensuring that the clamping ends of the first clamp 5 and the second clamp 6 are aligned; the first and second welding strips to be overlapped then enter the clamping gap between the first clamp 5 and the second clamp 6.

[0097] Finally, the clamping drive mechanism 4 drives the first chuck mounting base 2 and the second chuck mounting base 3 to move closer to the center, thereby causing the first chuck 5 and the second chuck 6 to clamp together, so as to achieve smooth clamping of the first and second welding strips.

[0098] As can be seen, in this embodiment, the welding strip clamping device, since at least one of the first clamp 5 and the second clamp 6 can be floatingly connected to the corresponding clamp mounting base, allows for adaptive adjustment of the relative position in the height direction of the first clamp 5 and the second clamp 6 during the descent to clamp the welding strip. Thus, even if there are assembly or manufacturing errors in the first clamp 5 and the second clamp 6, accurate matching can be achieved to effectively clamp the welding strip, ultimately ensuring the quality of subsequent lap welding.

[0099] like Figures 1 to 4As shown, in some optional embodiments, the first chuck 5 is buoyantly connected to the first chuck mounting base 2 via the first floating component 7, and / or the second chuck 6 is buoyantly connected to the second chuck mounting base 3 via the second floating component 8. Preferably, both the first chuck 5 and the second chuck 6 are configured to float vertically relative to their respective chuck mounting bases. This allows for more flexible adaptive adjustment of the position of the first chuck 5 and the second chuck 6 during the pressing and clamping of the welding strip, thereby ensuring accurate fit.

[0100] Optionally, the first floating assembly 7 includes a first spring limiting plate 71, a first guide post 72, and a first spring 73, wherein: the first spring limiting plate 71 is fixedly installed above the first chuck mounting base 2; the upper end of the first guide post 72 is slidably inserted into the first spring limiting plate 71; the lower end of the first guide post 72 is slidably inserted into the first chuck mounting base 2 and extends downward through the first chuck mounting base 2; the first spring 73 is fitted onto the first guide post 72; the upper end of the first spring 73 abuts against the first spring limiting plate 71; and the lower end of the first spring 73 abuts against the first chuck mounting base 2; the first chuck 5 is connected to the lower end of the first guide post 72.

[0101] Optionally, the second floating assembly 8 includes a second spring limiting plate 81, a second guide post 82, and a second spring 83, wherein: the second spring limiting plate 81 is fixedly installed above the second chuck mounting base 3; the upper end of the second guide post 82 is slidably inserted into the second spring limiting plate 81; the lower end of the second guide post 82 is slidably inserted into the second chuck mounting base 3 and extends downward through the second chuck mounting base 3; the second spring 83 is fitted onto the second guide post 82; the upper end of the second spring 83 abuts against the second spring limiting plate 81; and the lower end of the second spring 83 abuts against the second chuck mounting base 3; the second chuck 6 is connected to the lower end of the second guide post 82.

[0102] When the mounting bracket 1 descends, under the extension and retraction adjustment of the first spring 73 and the second spring 83, the first clamp 5 and the second clamp 6 can eventually elastically abut against the battery cell, thereby ensuring that the clamping end of the first clamp 5 is aligned with the clamping end of the second clamp 6.

[0103] like Figures 5 to 6 As shown, optionally, the welding strip clamping device in this embodiment further includes a first adaptive adjustment component 9. The first adaptive adjustment component 9 includes a first spring seat 91 and a third spring 92. The first spring seat 91 is fixedly installed on the second chuck mounting base 3. The middle part of the second chuck 6 is fixedly connected to the lower end of the second guide post 82. The first end of the second chuck 6 is used to cooperate with the corresponding first chuck 5 to clamp the welding strip. The second end of the second chuck 6 is press-fitted between the third spring 92 and the first spring seat 91.

[0104] Because a third spring 92 is press-fitted between the second end of the second chuck 6 and the first spring seat 91, when the clamping drive mechanism 4 drives the first chuck 5 and the second chuck 6 to clamp the solder strip, the first end of the second chuck 6 can rotate away from the first end of the first chuck 5 and compress the third spring 92 after being subjected to the reverse force of the solder strip. This ensures that the first end of the second chuck 6 and the first end of the first chuck 5 elastically clamp the solder strip, thereby enabling the first ends of the first chuck 5 and the first ends of the second chuck 6 to effectively clamp solder strips of different thicknesses, improving the compatibility of the solder strip clamping device in this embodiment. In addition, in some cases, there may be foreign objects such as solder balls on the solder strip to be clamped. When the first end of the second chuck 6 clamps the foreign object, the second chuck 6 can also adaptively rotate to effectively clamp the solder strip.

[0105] Optional, such as Figure 7 As shown, the bottom surface of the clamping end of the first chuck 5 is a stepped surface, which includes a first bottom surface 51, a second bottom surface 52, and a side surface 53. The first bottom surface 51 is lower than the second bottom surface 52, and the side surface 53 is located between the first bottom surface 51 and the second bottom surface 52. The clamping end of the second chuck 6 has a bottom surface 61 and a side end surface 62. The side end surface 62 of the clamping end of the second chuck 6 is opposite to the side surface 53 of the first chuck 5. The side end surface 62 of the clamping end of the second chuck 6 and the side surface 53 of the first chuck 5 move closer to each other or further away from each other as the first chuck mounting base 2 and the second chuck mounting base 3 move relative to each other, so as to clamp or release the welding strip.

[0106] By configuring the clamping ends of the first chuck 5 and the second chuck 6 as described above, when the first chuck 5 and the second chuck 6 descend, the first bottom surface 51 of the first chuck 5 and / or the bottom surface 61 of the clamping end of the second chuck 6 can float upwards after contacting the battery cell, eventually reaching the same height. The welding strip to be clamped enters between the side vertical surface 53 of the first chuck 5 and the side end surface 62 of the second chuck 6. Subsequently, the first chuck 5 and the second chuck 6 move closer to the middle, thereby causing the side vertical surface 53 of the first chuck 5 and the side end surface 62 of the second chuck 6 to smoothly clamp the welding strip.

[0107] like Figure 5As shown, optionally, the clamping drive mechanism 4 in this embodiment includes a motor 41, a cam 42, a first cam follower 43, a second cam follower 44, and a seventh spring 47, wherein: the motor 41 is mounted on the mounting bracket 1, and the cam 42 is connected to the drive shaft of the motor 41. The first cam follower 43 is connected to the first chuck mounting seat 2 and is located on the first side of the cam 42. The second cam follower 44 is connected to the second chuck mounting seat 3 and is located on the second side of the cam 42. The first end of the seventh spring 47 is connected to the first chuck mounting seat 2, and the second end of the seventh spring 47 is connected to the second chuck mounting seat 3. The seventh spring 47 is used to pull the first chuck mounting seat 2 and the second chuck mounting seat 3 towards the middle, so that the first cam follower 43 and the second cam follower 44 press against the cam 42.

[0108] When the motor 41 drives the cam 42 to rotate, it causes the first cam follower 43 and the second cam follower 44 to move closer or further away, thereby causing the first chuck mounting seat 2 and the second chuck mounting seat 3 to move closer to the center or separate to the sides.

[0109] It can be seen that by setting the clamping drive mechanism 4, only one motor is needed to drive the first chuck mounting base 2 and the second chuck mounting base 3 to move closer to the center or separate to the sides, thereby reducing the structural complexity and cost of the clamping drive mechanism 4.

[0110] Optionally, the clamping drive mechanism 4 in this embodiment further includes a first transmission plate 45 and a second transmission plate 46, wherein: the first transmission plate 45 is fixed on the first chuck mounting base 2, the first cam follower 43 is mounted on the first transmission plate 45, and the first end of the seventh spring 47 is connected to the first transmission plate 45; the second transmission plate 46 is fixed on the second chuck mounting base 3, the second cam follower 44 is mounted on the second transmission plate 46, and the second end of the seventh spring 47 is connected to the second transmission plate 46.

[0111] Second Embodiment

[0112] The welding strip clamping device in the first embodiment described above is provided with only one set of first clamps and second clamps, so it can only clamp and overlap a pair of first welding strips and second welding strips at a time.

[0113] This embodiment provides a welding strip clamping device with another structure, which can simultaneously clamp and overlap multiple pairs of first welding strips and second welding strips, thereby enabling the welding device to simultaneously weld multiple pairs of first welding strips and second welding strips, improving efficiency.

[0114] like Figures 8 to 11As shown, the welding strip clamping device in this embodiment includes a mounting bracket 1, a first chuck mounting base 2, a second chuck mounting base 3, a clamping drive mechanism 4, and at least two pairs of paired first chucks 5 and second chucks 6, wherein:

[0115] The first chuck mounting base 2 and the second chuck mounting base 3 are both slidably mounted on the mounting bracket 1 and are both connected to the drive end of the clamping drive mechanism 4. The clamping drive mechanism 4 is used to drive the first chuck mounting base 2 and the second chuck mounting base 3 to move closer together or to separate to both sides. Optionally, the mounting bracket 1 is provided with a parallel first slide rail 14 and a second slide rail 15, wherein the first chuck mounting base 2 is slidably connected to the first slide rail 14 and the second chuck mounting base 3 is slidably connected to the second slide rail 15.

[0116] Each first chuck 5 is arranged side-by-side at a distance on the first chuck mounting base 2 and is configured to float up and down relative to the first chuck mounting base 2; and / or each second chuck 5 is arranged side-by-side at a distance on the second chuck mounting base 3 and is configured to float up and down relative to the second chuck mounting base 3. That is, at least one of the first chuck 5 and the second chuck 6 is configured to float up and down relative to the corresponding chuck mounting base.

[0117] When the clamping drive mechanism 4 drives the first chuck mounting base 2 and the second chuck mounting base 3 to move closer to the center, each first chuck 5 and the corresponding second chuck 6 clamp together to clamp the welding strip.

[0118] When the clamping drive mechanism 4 drives the first chuck mounting base 2 and the second chuck mounting base 3 to separate to both sides, each first chuck 5 and the corresponding second chuck 6 open to release the welding strip.

[0119] The ribbon clamping device in this embodiment can perform horizontal overlap of at least two pairs of first and second ribbons located on the battery cell, as detailed below:

[0120] In the initial state, the first clamp 5 and the second clamp 6 of each group are in the open state.

[0121] Next, adjust the position of the mounting bracket 1 so that the clamping gap between each set of first clamps 5 and second clamps 6 is aligned with the corresponding first and second welding strips to be overlapped.

[0122] Next, the mounting bracket 1 is lowered. Since at least one of the first clamp 5 and the second clamp 6 is connected to the corresponding clamp mounting base by floating up and down, as the mounting bracket 1 descends, the lower ends of the first clamp 5 and the second clamp 6 eventually abut against the battery cell, thus ensuring that the clamping ends of each set of first clamps 5 and second clamps 6 are aligned. Each pair of first and second solder strips then enters the clamping gap between the corresponding first clamp 5 and second clamp 6.

[0123] Finally, the clamping drive mechanism 4 drives the first chuck mounting base 2 and the second chuck mounting base 3 to move closer to the center, thereby causing each set of first chucks 5 and second chucks 6 to clamp synchronously, so as to synchronously perform horizontal overlap of each pair of first and second welding strips.

[0124] As can be seen, the welding strip clamping device in this embodiment can simultaneously clamp and overlap at least two pairs of first welding strips and second welding strips, thereby enabling the welding device to simultaneously or in connection perform lap welding on at least two pairs of first welding strips and second welding strips, thus improving welding efficiency.

[0125] When applying the solder ribbon clamping device of this embodiment to battery string repair, optionally, the number of the first clamp and the second clamp can be set to be equal to the number of solder ribbons cut off on adjacent battery cells or on replacement battery cells. In this way, the solder ribbon clamping device can simultaneously clamp all solder ribbons on adjacent battery cells and replacement battery cells, thereby enabling the welding device to continuously or synchronously complete the lap welding of all solder ribbons, further improving repair efficiency.

[0126] like Figure 8 As shown, optionally, each first chuck 5 can be connected to the first chuck mounting base 2 via the third floating component 10, and / or each second chuck 6 can be connected to the second chuck mounting base 3 via the fourth floating component 11. Preferably, each first chuck 5 and each second chuck 6 is configured to float up and down relative to the corresponding chuck mounting base. In this way, the first chuck 5 and the second chuck 6 can more flexibly perform adaptive position adjustment during the pressing and clamping of the welding strip, thereby ensuring that each set of first chuck 5 and second chuck 6 can accurately cooperate.

[0127] like Figure 8 As shown, optionally, the third floating assembly 10 includes a lifting base 101, a third guide post, and a fourth spring 102, wherein: the upper end of the third guide post is fixedly connected to the first chuck mounting base 2, the lower end of the third guide post is slidably connected to the lifting base 101, the fourth spring 102 is fitted onto the third guide post, the upper end of the fourth spring 102 abuts against the first chuck mounting base 2, and the lower end of the fourth spring 102 abuts against the lifting base 101. All first chucks 5 are mounted together on the lifting base 101, and the clamping ends of each first chuck 5 extend downwards from the lifting base 101, meaning that each first chuck 5 floats synchronously with the lifting base 101.

[0128] Optionally, to facilitate the processing and installation of the first chuck 5, the welding strip clamping device in this embodiment also includes a clamping plate 12. All the first chucks 5 are integrally formed on the lower end of the clamping plate 12, and the clamping plate 12 is fixedly installed on the lifting seat 101.

[0129] like Figure 8 , Figure 10 and Figure 11 As shown, optionally, the fourth floating assembly 11 includes a third spring limiting plate 111, fourth guide posts 112 corresponding to the second clamps, and fifth springs 113. Specifically: the third spring limiting plate 111 is fixedly installed above the second clamp mounting base 3; the upper ends of each fourth guide post 112 are slidably inserted into the third spring limiting plate 111, and the lower ends of each fourth guide post 112 are slidably inserted into the second clamp mounting base 3 and extend downwards through it; each fifth spring 113 is fitted onto its corresponding fourth guide post 112, with its upper end abutting against the third spring limiting plate 111 and its lower end abutting against the second clamp mounting base 3. Each second clamp 6 is connected to the lower end of its corresponding fourth guide post, meaning that each second clamp 6 can float independently with its corresponding fourth guide post.

[0130] like Figure 13 As shown, optionally, the welding strip clamping device in this embodiment further includes a second adaptive adjustment component 13 corresponding to the second clamp 6. The second adaptive adjustment component 13 includes a second spring seat 131 and a sixth spring 132. The second spring seat 131 is fixedly installed on the second clamp mounting base 3. The middle part of each second clamp 6 is fixedly connected to the lower end of the corresponding fourth guide post 112. The first end of the second clamp 6 is used to cooperate with the corresponding first clamp 5 to clamp the welding strip. The second end of the second clamp 6 is press-fitted between the second spring seat 131 and the corresponding second spring seat 132.

[0131] Since a sixth spring 132 is press-fitted between the second end of each second clamp 6 and the corresponding second spring seat 131, when the clamping drive mechanism 4 drives each set of first clamps 5 and second clamps 6 to clamp the solder strip, the first end of each second clamp 6 can rotate away from the first end of the corresponding first clamp 5 after being subjected to the reverse force of the solder strip. This ensures that the first end of each second clamp 6 and the first end of the corresponding first clamp 5 can elastically clamp the corresponding solder strip, thereby enabling the first end of the first clamp 5 and the first end of the second clamp 6 to effectively clamp solder strips of different thicknesses, improving the compatibility of the solder strip clamping device in this embodiment. In addition, in some cases, there may be foreign objects such as solder balls on one of the pairs of solder strips to be clamped. When the first end of the second clamp 6 clamps the foreign object, the second clamp 6 can also adaptively rotate to effectively clamp the solder strip, ensuring that each pair of solder strips can be effectively clamped.

[0132] Optionally, in this embodiment, the clamping ends of the first chuck 5 and the second chuck 6 of the welding strip clamping device are configured to be similar in structure to... Figure 7In the first embodiment shown, the clamping ends of the first chuck 5 and the second chuck 6 are identical. For details regarding their specific structure and the clamping process of the solder strip, please refer to the relevant description of the first embodiment; it will not be repeated here.

[0133] like Figure 12 As shown, optionally, similar to the first embodiment, the clamping drive mechanism 4 in this embodiment includes a motor 41, a cam 42, a first cam follower 43, a second cam follower 44, and a seventh spring 47, wherein: the motor 41 is mounted on the mounting bracket 1, and the cam 42 is connected to the drive shaft of the motor 41. The first cam follower 43 is connected to the first chuck mounting seat 2 and is located on the first side of the cam 42. The second cam follower 44 is connected to the second chuck mounting seat 3 and is located on the second side of the cam 42. The first end of the seventh spring 47 is connected to the first chuck mounting seat 2, and the second end of the seventh spring 47 is connected to the second chuck mounting seat 3. The seventh spring 47 is used to pull the first chuck mounting seat 2 and the second chuck mounting seat 3 towards the middle, so that the first cam follower 43 and the second cam follower 44 press against the cam 42.

[0134] When the motor 41 drives the cam 42 to rotate, it causes the first cam follower 43 and the second cam follower 44 to move closer or further away, thereby causing the first chuck mounting seat 2 and the second chuck mounting seat 3 to move closer to the center or separate to the sides.

[0135] As can be seen, by setting the clamping drive mechanism 4, only one motor is needed to drive the first chuck mounting base 2 and the second chuck mounting base 3 to move closer to the center or separate to the sides, thereby reducing the structural complexity and cost of the clamping drive mechanism.

[0136] Optionally, the clamping drive mechanism 4 in this embodiment further includes a first transmission plate 45 and a second transmission plate 46, wherein: the first transmission plate 45 is fixed on the first chuck mounting base 2, the first cam follower 43 is mounted on the first transmission plate 45, and the first end of the seventh spring 47 is connected to the first transmission plate 45; the second transmission plate 46 is fixed on the second chuck mounting base 3, the second cam follower 44 is mounted on the second transmission plate 46, and the second end of the seventh spring 47 is connected to the second transmission plate 46.

[0137] The present invention also provides a method for repairing battery strings, which includes the following steps:

[0138] S1. Cut the solder strip between the defective cell and the adjacent cell in the battery string, and remove the defective cell to obtain a disassembled battery string with a disassembled end solder strip.

[0139] S2. The replacement battery cell is loaded into the empty position after the defective battery cell is removed. The replacement battery cell has a replacement solder strip group, wherein the replacement solder strip group corresponds one-to-one with the solder strip in the solder strip group at the disassembly end.

[0140] S3. Each welding strip in the replacement welding strip group is clamped and overlapped with the corresponding welding strip in the dismantling welding strip group by the welding strip clamping device, and the overlapped welding strips are connected by the connecting device. The welding strip clamping device is any welding strip clamping device provided in any of the first and second embodiments of the present invention.

[0141] Because the welding strip clamping device of the present invention allows for adaptive adjustment of the relative position of the first clamp and / or the second clamp during the clamping process, it can be ensured that each welding strip in the replacement welding strip group and the corresponding welding strip in the disassembled welding strip group can be smoothly overlapped together, thereby ensuring the quality of rework.

[0142] like Figure 14 As shown, when using the solder strip clamping device of the present invention to overlap the first solder strip 100 in the replacement solder strip group and the second solder strip 200 in the disassembly solder strip group, the first clamp 5 and the second clamp 6 of the solder strip clamping device only clamp the free end of one of the first solder strip 100 and the second solder strip 200, for example... Figure 14 The clamp holds the free end of the first welding strip 100. After clamping, the free end of the second welding strip 200 overlaps with the first welding strip 100. Thus, a portion of the overlap between the second welding strip 200 and the first welding strip 100 is exposed outside the first clamp 5 and the second clamp 6. Figure 14 The area to be connected is A, so that the external connecting device can directly perform the corresponding connecting operation on the area to be connected, without the need to set the avoidance hole on the first chuck 5 and the second chuck 6 to avoid the connecting device.

[0143] Optionally, the clamping operation of the welding strip in step S3 can be performed by any of the welding strip clamping devices in the first embodiment of the present invention. Since the welding strip clamping device is only provided with a set of first clamps and second clamps, it can only perform clamping and overlapping of one welding strip to be overlapped at a time.

[0144] Therefore, in step S3, the welding strips in the replacement welding strip group are clamped and overlapped together with the corresponding welding strips in the dismantled welding strip group using the welding strip clamping device, specifically as follows:

[0145] A welding strip clamping device is used to clamp and overlap each welding strip in the replacement welding strip group with the corresponding welding strip in the dismantling welding strip group one by one.

[0146] That is, the clamping and connecting operations are performed alternately. After the welding strip clamping device clamps one welding strip from the replacement welding strip group and one corresponding welding strip from the dismantling welding strip group, the connecting device immediately connects the two clamped welding strips to be connected. Then, the welding strip clamping device releases the two overlapped welding strips and clamps and overlaps two other welding strips. The connecting device then connects the other two clamped welding strips to be connected. This process is repeated until all welding strips in the replacement welding strip group are connected to their corresponding welding strips in the dismantling welding strip group.

[0147] Furthermore, to improve connection efficiency, in step S3, the solder ribbons in the replacement solder ribbon group are clamped and overlapped together with the corresponding solder ribbons in the dismantled solder ribbon group using a solder ribbon clamping device. Specifically:

[0148] Multiple welding strip clamping devices simultaneously or alternately clamp and overlap each welding strip in the replacement welding strip group with the corresponding welding strip in the dismantling welding strip group.

[0149] Optionally, in step S3, connecting the overlapped welding strips via a connecting device specifically involves:

[0150] The connection device used consists of a welding device and an adhesive application device. The welding device welds the overlapping solder strips together, and the adhesive application device applies adhesive to the overlap to bond the welded solder strips together. In other words, each solder strip in the replacement solder strip group is doubly connected to its corresponding solder strip in the disassembled solder strip group through welding and adhesive bonding. Thus, during subsequent use, even if the solder at the connection point of the two connected solder strips melts or partially melts due to the internal temperature rise of the photovoltaic module, the two solder strips will not detach from each other because they are simultaneously bonded by the adhesive.

[0151] Of course, if the solder on the solder strip has a high melting point, the internal heating of the photovoltaic module will not cause the solder at the joint of the solder strip to melt. In this case, the step S3 of connecting the overlapping solder strips with the connecting device can also be: the connecting device is a welding device, which welds the overlapping solder strips together. Alternatively, when adhesive bonding is sufficient to achieve a stable connection between the two solder strips, the step S3 of connecting the overlapping solder strips with the connecting device can also be: the connecting device is an adhesive applicator, which applies adhesive to bond the overlapping solder strips together.

[0152] The present invention also provides a method for repairing battery strings, which includes the following steps:

[0153] S10. Remove the exposed white solder strips that deviate from the main grid line from the corresponding battery cell. To improve efficiency, only the exposed white solder joints need to be removed. Solder joints without exposed white solder joints do not need to be removed.

[0154] S20. The exposed white solder strip is held by the solder strip clamping device, and the exposed white solder strip is aligned on the main grid line by the solder strip clamping device, wherein the solder strip clamping device is the solder strip clamping device provided in any one of the first embodiments of the present invention.

[0155] S40. Weld the exposed white solder strip onto the main grid line.

[0156] Because the solder strip clamping device provided by this invention allows for adaptive adjustment of the relative positions of the first and second clamps during the solder strip clamping process, it ensures successful clamping of the exposed solder strip, aligning it with the main grid line, and ultimately enabling the exposed solder strip to be accurately welded onto the main grid line, thus guaranteeing rework quality.

[0157] Optionally, before performing step S40 of welding the exposed solder strip to the main grid line, the battery string repair method of the present invention further includes the step of:

[0158] S30: The exposed white solder strip is pressed tightly onto the main grid line by a pressure needle. The pressure needle and the solder strip clamping device are located on both sides of the position to be welded on the exposed white solder strip.

[0159] By pressing the exposed solder strip onto the main grid line with a pressure pin, it can be ensured that the exposed solder strip is firmly welded to the main grid line, preventing incomplete soldering and further improving the quality of rework.

[0160] like Figure 15 As shown, the exposed white solder strip 300 is clamped using the solder strip clamping device in the first embodiment. The first chuck 5 and the second chuck 6 of the solder strip clamping device clamp the exposed white solder strip 300 from one side and adjust the position of the exposed white solder strip 300. The pressure pin 400 presses down on the exposed white solder strip 300 from the other side. The welding position B is located between the solder strip clamping device and the pressure pin 400. The external welding device can directly perform welding operations on the welding position B.

[0161] The present invention has been described above in sufficient detail and with certain specificities. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of the invention should fall within the protection scope of the invention. The scope of protection claimed by the present invention is defined by the claims, and not by the above descriptions in the embodiments.

Claims

1. A method for repairing battery strings, characterized in that, The battery string repair method includes: Cut the solder strip between the defective cell and the adjacent cell in the battery string, and remove the defective cell to obtain a disassembled battery string with a disassembled solder strip. The replacement battery cell is loaded into the empty position after the defective battery cell is removed. The replacement battery cell has a replacement solder strip group, wherein the replacement solder strip group corresponds one-to-one with the solder strips in the disassembly end solder strip group. The solder strips in the replacement solder strip group are clamped and overlapped together with the corresponding solder strips in the disassembly end solder strip group by a solder strip clamping device, and the overlapped solder strips are connected by a connecting device. The welding strip clamping device includes a mounting bracket, a first clamp mounting base, a second clamp mounting base, a clamping drive mechanism, and at least one pair of first and second clamps, wherein: Both the first chuck mounting base and the second chuck mounting base are slidably mounted on the mounting bracket and are both connected to the drive end of the clamping drive mechanism. The clamping drive mechanism is used to drive the first chuck mounting base and the second chuck mounting base to move closer to the center or to separate to both sides. The first chuck is disposed on the first chuck mounting base, and the second chuck is disposed on the second chuck mounting base, wherein the first chuck is configured to float up and down relative to the first chuck mounting base, and / or the second chuck is configured to float up and down relative to the second chuck mounting base; When the clamping drive mechanism drives the first clamp mounting base and the second clamp mounting base to move closer to the center, the first clamp and the corresponding second clamp clamp together to clamp the welding strip. As the mounting bracket descends, the lower ends of the first clamp and the lower ends of the second clamp eventually abut against the battery cell, so that the clamping ends of the first clamp and the second clamp are aligned. When the clamping drive mechanism drives the first chuck mounting base and the second chuck mounting base to separate to both sides, the first chuck and the corresponding second chuck open to release the welding strip; The bottom surface of the clamping end of the first chuck is a stepped surface, which includes a first bottom surface, a second bottom surface, and a side surface. The first bottom surface is lower than the second bottom surface, and the side surface is located between the first bottom surface and the second bottom surface. The clamping end of the second chuck has a bottom surface and a side surface. The side surface of the clamping end of the second chuck is opposite to the side surface of the first chuck. The side surface of the clamping end of the second chuck and the side surface of the first chuck move closer to each other or further away from each other as the first chuck mounting base and the second chuck mounting base move relative to each other, so as to clamp or release the welding strip.

2. The battery string repair method as described in claim 1, characterized in that: The connection of the overlapped welding strips via the connecting device includes: The connecting device is a welding device, which welds the overlapping weld strips together; or... The connecting device is an adhesive applicator, which uses adhesive to bond the overlapping weld strips together; or... The connecting device includes a welding device and an adhesive application device. The welding device welds the overlapping welding strips together, and the adhesive application device applies adhesive to the overlapping area of ​​the welding strips to bond the welded welding strips together.

3. The battery string repair method as described in claim 1, characterized in that: The welding strip clamping device includes a set of first clamps and a set of second clamps; The first chuck is buoyantly connected to the first chuck mounting base via a first floating component; and / or The second chuck is connected to the second chuck mounting base in a way that allows it to float up and down via the second floating component; The step of clamping and overlapping each solder strip in the replacement solder strip group with the corresponding solder strip in the disassembled solder strip group using a solder strip clamping device includes: Each of the welding strips in the replacement welding strip group is clamped and overlapped with the corresponding welding strips in the disassembled welding strip group one by one by a welding strip clamping device. or The welding strips in the replacement welding strip group are clamped and overlapped together with the corresponding welding strips in the disassembly end welding strip group by multiple welding strip clamping devices simultaneously or alternately.

4. The battery string repair method as described in claim 3, characterized in that: The first floating assembly includes a first spring limiting plate, a first guide post, and a first spring, wherein: The first spring limiting plate is fixedly installed above the first chuck mounting base. The upper end of the first guide post is slidably inserted into the first spring limiting plate, and the lower end of the first guide post is slidably inserted into the first chuck mounting base and extends downward through the first chuck mounting base. The first spring is fitted on the first guide post, with the upper end of the first spring abutting against the first spring limiting plate and the lower end of the first spring abutting against the first chuck mounting base. The first clamp is connected to the lower end of the first guide post.

5. The battery string repair method as described in claim 3, characterized in that: The second floating assembly includes a second spring limiting plate, a second guide post, and a second spring, wherein: The second spring limiting plate is fixedly installed above the second chuck mounting base. The upper end of the second guide post is slidably inserted into the second spring limiting plate, and the lower end of the second guide post is slidably inserted into the second chuck mounting base and extends downward through the second chuck mounting base. The second spring is fitted on the second guide post, with the upper end of the second spring abutting against the second spring limiting plate and the lower end of the second spring abutting against the second chuck mounting base. The second clamp is connected to the lower end of the second guide post.

6. The battery string repair method as described in claim 5, characterized in that: The welding strip clamping device further includes a first adaptive adjustment component, which includes a first spring seat and a third spring. The first spring seat is fixedly installed on the second chuck mounting seat. The middle part of the second chuck is fixedly connected to the lower end of the second guide post. The first end of the second chuck is used to cooperate with the corresponding first chuck to clamp the welding strip. The second end of the second chuck is press-fitted between itself and the first spring seat with the third spring.

7. The battery string repair method as described in claim 1, characterized in that: The welding strip clamping device includes at least two sets of first clamps and second clamps, wherein: Each of the first chucks is arranged side-by-side at intervals and is connected to the first chuck mounting base by a third floating component, allowing it to float up and down; and / or Each of the second chucks is arranged side by side at intervals and is connected to the second chuck mounting base by a fourth floating component, which can float up and down.

8. The battery string repair method as described in claim 7, characterized in that: The third floating component includes a lifting seat, a third guide column, and a fourth spring, wherein: The upper end of the third guide post is fixedly connected to the first chuck mounting base, the lower end of the third guide post is slidably connected to the lifting base, the fourth spring is fitted on the third guide post, the upper end of the fourth spring abuts against the first chuck mounting base, and the lower end of the fourth spring abuts against the lifting base. Each of the first clamps is mounted together on the lifting seat, and the clamping end of each of the first clamps extends downward out of the lifting seat.

9. The battery string repair method as described in claim 8, characterized in that: The welding strip clamping device further includes a clamping plate, with each of the first clamps integrally formed at the lower end of the clamping plate, and the clamping plate is fixedly installed on the lifting seat.

10. The battery string repair method as described in claim 7, characterized in that: The fourth floating component includes a third spring limiting plate, a fourth guide post corresponding to the second clamp, and a fifth spring, wherein: The third spring limiting plate is fixedly installed above the second clamp mounting base. The upper ends of each of the fourth guide posts are slidably inserted into the third spring limiting plate, and the lower ends of each of the fourth guide posts are slidably inserted into the second clamp mounting base and extend downward through the second clamp mounting base. Each of the fifth springs is fitted onto the corresponding fourth guide post, with the upper end of each fifth spring abutting against the third spring limiting plate and the lower end of each fifth spring abutting against the second clamp mounting base. Each of the second clamps is connected to the lower end of the corresponding fourth guide post.

11. The battery string repair method as described in claim 10, characterized in that: The welding strip clamping device further includes a second adaptive adjustment component corresponding to each of the second clamps. The second adaptive adjustment component includes a second spring seat and a sixth spring. The second spring seat is fixedly installed on the second clamp mounting base. The middle part of each second clamp is fixedly connected to the lower end of the corresponding fourth guide post. The first end of the second clamp is used to cooperate with the corresponding first clamp to clamp the welding strip. The second end of the second clamp is press-fitted between the second end of the second clamp and the corresponding second spring seat with the sixth spring.

12. The battery string repair method as described in claim 1, characterized in that: The clamping drive mechanism includes a motor, a cam, a first cam follower, a second cam follower, and a seventh spring, wherein: The motor is mounted on the mounting bracket, and the cam is connected to the drive shaft of the motor; The first cam follower is connected to the first chuck mounting base and is located on the first side of the cam; the second cam follower is connected to the second chuck mounting base and is located on the second side of the cam. The first end of the seventh spring is connected to the first chuck mounting seat, and the second end of the seventh spring is connected to the second chuck mounting seat. The seventh spring is used to pull the first chuck mounting seat and the second chuck mounting seat towards the middle, so that the first cam follower and the second cam follower press against the cam. When the motor drives the cam to rotate, it causes the first cam follower and the second cam follower to move closer or further away, thereby causing the first chuck mounting seat and the second chuck mounting seat to move closer to the center or separate to the sides.

13. A method for repairing battery strings, characterized in that, The battery string repair method includes: Desolder the exposed white solder strips that deviate from the main grid lines in the battery string from the corresponding battery cell; The exposed white solder strip is held by a solder strip clamping device, and the exposed white solder strip is aligned with the main grid line by the solder strip clamping device; The exposed white solder strip is pressed tightly onto the main grid line by a pressure pin, and the pressure pin and the solder strip clamping device are respectively located on both sides of the position to be welded of the exposed white solder strip; The exposed white solder strip is welded to the main grid line; the solder strip clamping device includes a mounting bracket, a first clamp mounting base, a second clamp mounting base, a clamping drive mechanism, and a pair of first and second clamps, wherein: Both the first chuck mounting base and the second chuck mounting base are slidably mounted on the mounting bracket and are both connected to the drive end of the clamping drive mechanism. The clamping drive mechanism is used to drive the first chuck mounting base and the second chuck mounting base to move closer to the center or to separate to both sides. The first chuck is disposed on the first chuck mounting base, and the second chuck is disposed on the second chuck mounting base, wherein the first chuck is configured to float up and down relative to the first chuck mounting base, and / or the second chuck is configured to float up and down relative to the second chuck mounting base; When the clamping drive mechanism drives the first clamp mounting base and the second clamp mounting base to move closer to the center, the first clamp and the corresponding second clamp clamp together to clamp the welding strip. As the mounting bracket descends, the lower ends of the first clamp and the lower ends of the second clamp eventually abut against the battery cell, so that the clamping ends of the first clamp and the second clamp are aligned. When the clamping drive mechanism drives the first chuck mounting base and the second chuck mounting base to separate to both sides, the first chuck and the corresponding second chuck open to release the welding strip; The bottom surface of the clamping end of the first chuck is a stepped surface, which includes a first bottom surface, a second bottom surface, and a side surface. The first bottom surface is lower than the second bottom surface, and the side surface is located between the first bottom surface and the second bottom surface. The clamping end of the second chuck has a bottom surface and a side surface. The side surface of the clamping end of the second chuck is opposite to the side surface of the first chuck. The side surface of the clamping end of the second chuck and the side surface of the first chuck move closer to each other or further away from each other as the first chuck mounting base and the second chuck mounting base move relative to each other, so as to clamp or release the welding strip. The first chuck is connected to the first chuck mounting base in a floating manner via a first floating component; and / or the second chuck is connected to the second chuck mounting base in a floating manner via a second floating component.

14. The battery string repair method as described in claim 13, characterized in that, The first floating assembly includes a first spring limiting plate, a first guide post, and a first spring, wherein: The first spring limiting plate is fixedly installed above the first chuck mounting base. The upper end of the first guide post is slidably inserted into the first spring limiting plate, and the lower end of the first guide post is slidably inserted into the first chuck mounting base and extends downward through the first chuck mounting base. The first spring is fitted on the first guide post, with the upper end of the first spring abutting against the first spring limiting plate and the lower end of the first spring abutting against the first chuck mounting base. The first clamp is connected to the lower end of the first guide post.

15. The battery string repair method as described in claim 13, characterized in that, The second floating assembly includes a second spring limiting plate, a second guide post, and a second spring, wherein: The second spring limiting plate is fixedly installed above the second chuck mounting base. The upper end of the second guide post is slidably inserted into the second spring limiting plate, and the lower end of the second guide post is slidably inserted into the second chuck mounting base and extends downward through the second chuck mounting base. The second spring is fitted on the second guide post, with the upper end of the second spring abutting against the second spring limiting plate and the lower end of the second spring abutting against the second chuck mounting base. The second clamp is connected to the lower end of the second guide post.

16. The battery string repair method as described in claim 15, characterized in that, The welding strip clamping device further includes a first adaptive adjustment component, which includes a first spring seat and a third spring. The first spring seat is fixedly installed on the second chuck mounting seat. The middle part of the second chuck is fixedly connected to the lower end of the second guide post. The first end of the second chuck is used to cooperate with the corresponding first chuck to clamp the welding strip. The second end of the second chuck is press-fitted between itself and the first spring seat with the third spring.

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