Welding equipment for new energy automobile lithium battery manufacturing and production

Abstract

The invention relates to the technical field of laser welding equipment, and discloses welding equipment for new energy automobile lithium battery manufacturing and production, the welding equipment comprises a workbench and a positioning plate, a plurality of positioning grooves are formed in the positioning plate, the positioning plate is matched with the positioning grooves, and positioning block sets are arranged on the inner sides of the positioning grooves; the top of the workbench is provided with an adjusting mechanism corresponding to the positioning plate. An electromagnet is matched with a permanent magnet to drive a sliding plug to move, the electromagnet is matched with an adjusting spring to adjust the air pressure in a communication hole, in the electrode slice placing and feeding process, air in the communication hole is sucked to generate negative pressure, a movable block set is opened, and in the subsequent synchronous moving process of a positioning plate and a battery module, the battery module is fixed. And gas is charged reversely, the movable block sets are driven by the limiting rods to abut against the periphery of the electrode plate for centering and positioning, and under the condition that deformation of the electrode plate caused by basic friction is avoided, the feeding efficiency is improved, and the positioning precision of the electrode plate in the subsequent machining process is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of laser welding equipment, and in particular to welding equipment for the manufacture and production of lithium batteries for new energy vehicles. Background Art

[0002] During the manufacturing process of lithium-ion batteries for new energy vehicles, laser welding equipment is required to weld the ends of copper-nickel electrode sheets to the corresponding battery cells of two adjacent batteries, thus welding the battery module composed of several arranged and fixed lithium-ion battery cells. Existing laser welding equipment includes a laser welding assembly. The battery module is placed in the corresponding welding area of ​​the laser welding assembly. The laser welding assembly is positioned using a positioning assembly. The copper-nickel electrode sheets are then placed on top of two adjacent battery cells in the battery module. The laser welding assembly then welds the electrode sheets to the corresponding battery cells.

[0003] However, during the use of traditional laser welding equipment, the lithium battery cell is located in the bottom area of ​​the laser welding assembly after positioning, and it is usually necessary to manually place several copper-nickel electrode sheets on the battery cell in turn. The positioning of the copper-nickel electrode sheets is prone to manual errors and the loading process of the copper-nickel electrode sheets is time-consuming and labor-intensive. Placing the copper-nickel electrode sheets first and then moving and positioning the battery module can easily cause the copper-nickel electrode sheets to deviate from the corresponding position of the battery cell under the action of inertia, resulting in a decrease in the quality of subsequent welding. Summary of the Invention

[0004] This application proposes a welding equipment for the manufacture of lithium batteries for new energy vehicles, which has the advantages of improving the efficiency of electrode sheet feeding while ensuring the positioning accuracy of the electrode sheet welding process. It is used to solve the problem of lack of continuous positioning after electrode sheet feeding, resulting in the cumbersome process of first positioning the battery module and then feeding the electrode sheet.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: A welding device for manufacturing lithium batteries for new energy vehicles, comprising: a workbench and a positioning plate, wherein the positioning plate is provided with a plurality of positioning grooves, the positioning plate cooperates with the positioning grooves, and a positioning block group is provided inside the positioning grooves;

[0006] An adjustment mechanism corresponding to the positioning plate is provided on the top of the workbench. The adjustment mechanism can drive the positioning plate to move synchronously relative to the battery module. The adjustment mechanism can drive the positioning block group to extend and retract along the corresponding direction relative to the positioning groove. When the electrode sheet is placed on the battery module, the positioning block group moves and opens. After the electrode sheet is loaded, the positioning block group contracts to center the electrode sheet.

[0007] Furthermore, the shape of the positioning groove is adapted to the shape of the outer wall of the electrode sheet in a horizontal state, and the adjustment mechanism includes a No. 2 limit plate, which is fixedly connected to the positioning plate, and a No. 3 limit plate is fixedly provided on one side of the positioning plate, and the spacing between the No. 2 limit plate and the No. 3 limit plate is adapted to the horizontal length of the corresponding battery module.

[0008] Furthermore, the adjustment mechanism also includes a connecting seat, the bottom of which is fixedly connected to a first limiting plate, and the number of the positioning plates is set to two.

[0009] Furthermore, the positioning block group includes several longitudinal positioning blocks, a No. 1 adjustment block and a No. 2 adjustment block. The No. 1 adjustment block, the No. 2 adjustment block and the longitudinal positioning block can all extend into corresponding positioning slots and be located around the electrode sheet.

[0010] Furthermore, the adjustment mechanism also includes an air pressure adjustment mechanism. The size of the positioning groove is larger than the size of the electrode sheet. Sliding grooves are provided on both sides of the front and back sides of the inner wall of the positioning groove. A limiting rod is slidably sleeved on the inner side of the sliding groove. The limiting rod is T-shaped. A vent is provided inside the positioning plate. The sliding groove is connected to the vent. The air pressure adjustment mechanism can adjust the gas pressure in the vent, and the limiting rod is used to drive the positioning block group to move.

[0011] Furthermore, the air pressure regulating mechanism includes a fixed cylinder, which is fixedly connected to the positioning plate, and the inner side sliding sleeve of the fixed cylinder is provided with a sliding plug for separating the inner cavity of the fixed cylinder, a through hole is provided on one side of the top of the fixed cylinder, a No. 2 connecting hole is provided on one side of the fixed cylinder, and a No. 1 connecting hole is provided on one side of the positioning plate, and the No. 1 connecting hole and the No. 2 connecting hole are connected to each other.

[0012] Furthermore, a permanent magnet is fixedly connected to one side of the sliding plug, an electromagnet is fixedly connected to the bottom side of the connecting seat, and an adjustment spring is movably provided on one side of the fixed cylinder. The acting force between the electromagnet and the permanent magnet is a repulsive force, and the magnitude of the repulsive force is greater than the elastic force of the adjustment spring.

[0013] Furthermore, a number of electric push rods No. 1 is fixedly provided on the top of the workbench, and the number of the electric push rods is adapted to the number of the positioning plates. The output end of the electric push rod No. 1 is fixedly connected to the connecting seat. A moving block is fixedly connected to one side of the positioning plate. The connecting seat is slidingly connected to the moving block. A number two electric push rod is fixedly provided on the top of the connecting seat. The output end of the number two electric push rod is fixedly connected to the moving block.

[0014] Furthermore, a laser welding assembly is fixedly installed on one side of the workbench. The No. 1 positioning plate is in the shape of a Chinese character "匚" and the spacing between the plates located on the front and back sides of the battery module is adapted to the length of the battery module in the longitudinal direction.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present application provides a welding equipment for the manufacture and production of lithium batteries for new energy vehicles. Two No. 1 electric push rods cooperate with the corresponding connecting seats and moving blocks to drive the corresponding positioning plates and battery modules for positioning in turn. While ensuring continuous welding operations, the electrode sheets are positioned by the positioning block group in the positioning groove. At the same time, with the cooperation of the No. 1 limit plate, the No. 2 limit plate and the No. 3 limit plate, the positioning plate and the battery module are moved synchronously during the process of moving and loading the battery module, and the position of the battery moving module is limited. On the one hand, the battery module is positioned, and on the other hand, the positioning accuracy of the electrode sheet relative to the battery module is guaranteed, thereby improving the efficiency of moving and loading the battery module and the efficiency of placing the electrode sheet on the battery module at the same time, and ensuring the positioning accuracy of the battery module and the electrode sheet.

[0017] 2. The present application provides a welding equipment for the manufacture and production of lithium batteries for new energy vehicles. The positioning block group moves and opens during the electrode sheet loading process, which facilitates the placement of the electrode sheet on the battery cell of the battery module and avoids the influence of the contact friction resistance of the positioning block group, thereby further improving the loading efficiency. At the same time, the subsequent movement of the positioning block group and the contraction during welding center the electrode sheet to ensure the positioning accuracy of the electrode sheet, and resets during the pushing process of the positioning plate to avoid deformation of the electrode sheet caused by the friction resistance between the positioning block group and the electrode sheet, thereby further improving the reliability of the use of the welding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive work.

[0019] Figure 1 This is a schematic diagram of the overall structure of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the positioning plate for this application;

[0021] Figure 3 This is a schematic diagram of the corresponding structure of the battery module and positioning plate of this application;

[0022] Figure 4 This is a schematic cross-sectional diagram of the structure of the vent hole in this application;

[0023] Figure 5 This is a schematic cross-sectional diagram of the structure of the adjustment tube for this application.

[0024] In the figure: 1-workbench, 2-No. 1 electric push rod, 3-connecting seat, 4-positioning plate, 5-moving block, 6-No. 1 limit plate, 7-battery module, 8-electrode sheet, 9-longitudinal positioning block, 10-No. 1 adjustment block, 11-No. 2 adjustment block, 12-limit rod, 13-sliding groove, 14-ventilation hole, 15-No. 1 connecting hole, 16-No. 2 connecting hole, 17-fixing cylinder, 18-sliding plug, 19-permanent magnet, 20-electromagnet, 21-adjusting spring, 22-through hole, 23-No. 2 electric push rod, 24-laser welding assembly, 25-positioning groove, 26-No. 2 limit plate, 27-No. 3 limit plate. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1, as Figure 1-Figure 5 A welding device for manufacturing lithium batteries for new energy vehicles includes a workbench 1 and a positioning plate 4. The positioning plate 4 is used to position the electrode sheet 8 placed on the battery module 7. A laser welding assembly 24 is fixedly provided on one side of the workbench 1. The positioning plate 4 moves synchronously with the battery module 7 during the process of moving the electrode sheet to the corresponding working area of ​​the laser welding assembly 24 after the battery module 7 is placed. For details, see Figure 3 A number of positioning grooves 25 are provided on the positioning plate 4. The shape of the positioning grooves 25 is adapted to the shape of the outer wall of the electrode sheet 8 in the horizontal state, and the size of the positioning grooves 25 is not less than the size of the electrode sheet 8, that is, the positioning grooves 25 can be sleeved on the outer side of the horizontally placed electrode sheet 8. A second limiting plate 26 is fixedly provided on one side of the positioning plate 4, and a third limiting plate 27 is fixedly provided on one side of the positioning plate 4. The spacing between the second limiting plate 26 and the third limiting plate 27 is adapted to the horizontal length of the corresponding battery module.

[0027] A connecting seat 3 is provided on the top of the workbench 1, and the bottom of the connecting seat 3 is fixedly connected to a limit plate No. 1. The limit plate No. 1 cooperates with the limit plate No. 26 and the limit plate No. 3 27 to fix the position of the positioning plate 4 and the battery module 7 relative to the connecting seat 3. The position of the connecting seat 3 is fixed relative to the battery module 7 during the movement of the battery module 7, that is, the connecting seat 3 can move synchronously with the battery module 7 and the positioning plate 4.

[0028] During use, first place the positioning plate 4 on the top of the battery module 7, and the No. 1 limiting plate 6, the No. 2 limiting plate 26 and the No. 3 limiting plate 27 cooperate to fix the relative position of the positioning plate 4 and the battery module 7, and place several electrode sheets 8 on the inner sides of the corresponding positioning grooves 25. The positioning grooves 25 limit the positions of the electrode sheets to ensure that the positions of the electrode sheets 8 will not shift under the action of inertia during the subsequent movement of the battery module 7. After the laser welding assembly completes the welding between the electrode sheets 8 and the battery cells at the corresponding positions on the battery module 7, the positioning plate 4 is separated from the battery module 7, and the battery module 7 is unloaded. The number of positioning plates 4 is set to two, and the two positioning plates 4 are loaded in turn, that is, when one of the two positioning plates 4 cooperates with the battery module 7 for laser welding, the battery module 7 corresponding to the other positioning plate 4 is loaded with electrode sheets 8, thereby ensuring the continuity of the welding process and improving production efficiency.

[0029] See Figure 2-Figure 5 , a plurality of longitudinal positioning blocks 9 are slidingly provided on the inner side of the positioning plate 4. The number of longitudinal positioning blocks 9 matches the number of positioning slots 25 and the longitudinal positioning blocks 9 are respectively located on the inner walls of the front and back sides of the corresponding positioning slots 25. Figure 2 , a number of No. 1 adjustment blocks 10 are slidingly provided on the inner side of the positioning plate 4, and the No. 1 adjustment blocks 10 are arranged on both sides of the front and back sides of the positioning plate 4. A number of No. 2 adjustment blocks 11 are slidingly provided on the inner side of the positioning plate 4, and the No. 2 adjustment blocks 11 are arranged between two adjacent positioning grooves 25, and the No. 2 adjustment blocks 11 corresponding to the two adjacent positioning grooves 25 are staggered in the longitudinal direction. The No. 1 adjustment block 10, the No. 2 adjustment block 11 and the longitudinal positioning block 9 can all be extended into the corresponding positioning groove 25 and are located around the electrode sheet 8, and can resist the outer walls around the electrode sheet 8 for positioning the corresponding electrode sheet 8.

[0030] Sliding grooves 13 are provided on both sides of the front and back of the inner wall of the positioning groove 25. The No. 1 adjustment block 10, the No. 2 adjustment block 11 and the longitudinal positioning block 9 correspond to the positions of the sliding groove 13. The inner side of the sliding groove 13 is slidably sleeved with a limit rod 12. The limit rod 12 is T-shaped. The limit rod 12 can slide axially without leaving the sliding groove 13. A vent hole 14 is provided inside the positioning plate 4. The sliding groove 13 is connected to the vent hole 14. A fixed cylinder 17 is fixedly connected to one side of the positioning plate 4. The fixed cylinder 17 is arranged horizontally. The inner side of the fixed cylinder 17 is slidably sleeved with a sliding plug 18. The sliding plug 18 separates the cavity of the fixed cylinder 17. See Figure 5 A through hole 22 is provided on one side of the top of the fixed cylinder 17, and the through hole 22 connects the cavity on the side of the fixed cylinder 17 facing away from the positioning plate 4 with the air outside the fixed cylinder 17. A No. 2 connecting hole 16 is provided on one side of the fixed cylinder 17, and a No. 1 connecting hole 15 is provided on one side of the positioning plate 4. The positions of the No. 1 connecting hole 15 and the No. 2 connecting hole 16 correspond to each other and are connected to each other.

[0031] The No. 1 connecting hole 15 cooperates with the No. 2 connecting hole 16 to connect the cavity on one side of the fixed cylinder 17 close to the positioning plate 4 and the vent 14. A permanent magnet 19 is fixedly connected to one side of the sliding plug 18, and an electromagnet 20 is fixedly connected to the side of the connecting seat 3 near the bottom. An adjusting spring 21 is movably provided on one side of the fixed cylinder 17. The adjusting spring 21 is used to push the sliding plug 18 away from the positioning plate 4, so that the sliding plug 18 sucks the gas in the vent 14 through the No. 1 connecting hole 15 and the No. 2 connecting hole 16. The position of the electromagnet 20 corresponds to the position of the permanent magnet 19. The acting force between the electromagnet 20 and the permanent magnet 19 is a repulsive force, and the magnitude of the repulsive force is greater than the elastic force of the adjusting spring 21.

[0032] The size of the positioning groove 25 is larger than the size of the electrode sheet 8. When the position of the positioning plate 4 is fixed relative to the position of the battery module 7, the adjusting spring 21 is in an extended state. The adjusting spring 21 drives the sliding plug 18 to suck the gas in the vent 14, so that negative pressure is generated in the vent 14 and the sliding groove 13, thereby driving the limit rod 12 to shrink into the sliding groove 13. The limit rod 12 drives the corresponding longitudinal positioning block 9, No. 1 adjustment block 10 and No. 2 adjustment block 11 to move respectively, so that the longitudinal positioning block 9, No. 1 adjustment block 10 and No. 2 adjustment block 11 make room for the subsequent placement of the electrode sheet 8, thereby further improving the loading efficiency of the electrode sheet 8.

[0033] After the electrode sheet 8 is loaded, the electromagnet 20 is started and cooperated with the permanent magnet 19 to drive the sliding plug 18 to move close to the positioning plate 4. The sliding plug 18 presses the air in the cavity on one side of the fixed cylinder 17 into the vent 14, so that the end face of one end of the limiting rod 12 is subjected to increased gas pressure. The gas in the vent 14 pushes the limiting rod 12 to extend the rated length of the sliding groove 13. The length of the limiting rod 12 extending from the sliding groove 13 is adapted to the size of the electrode sheet 8, and drives the corresponding longitudinal positioning block 9, the No. 1 adjustment block 10 and the No. 2 adjustment block 11 respectively. The side wall of the electrode sheet 8 is fitted to drive the electrode sheet 8 to be centered and positioned, thereby improving the loading efficiency while ensuring the positioning accuracy of the electrode sheet 8. After the subsequent welding is completed, the electromagnet 20 is turned off, and the contact of the longitudinal positioning block 9, the No. 1 adjustment block 10 and the No. 2 adjustment block 11 with the electrode sheet 8 is removed. In the process of the positioning plate 4 being separated from the battery module 7, the friction between the longitudinal positioning block 9, the No. 1 adjustment block 10 and the No. 2 adjustment block 11 and the electrode sheet 8 is avoided to disturb the electrode sheet 8, which may cause deformation of the electrode sheet 8, thereby ensuring the welding quality.

[0034] A No. 1 electric push rod 2 is fixedly provided on the top of the workbench 1. The number of the No. 1 electric push rod 2 is adapted to the number of the positioning plates 4. The output end of the No. 1 electric push rod 2 is fixedly connected to the connecting seat 3. A moving block 5 is fixedly connected to one side of the positioning plate 4. The connecting seat 3 is slidably connected to the moving block 5. The moving block 5 can slide up and down relative to the connecting seat 3 without separating from the connecting seat 3. A No. 2 electric push rod 23 is fixedly provided on the top of the connecting seat 3. The output end of the No. 2 electric push rod 23 is fixedly connected to the moving block 5. The No. 1 positioning plate is in the shape of a Chinese character "匚" and the spacing between the plates located on the front and back sides of the battery module 7 is adapted to the length of the battery module 7 in the longitudinal direction.

[0035] When in use, the No. 2 electric push rod 23 contracts to drive the moving block 5 to rise, and the moving block 5 drives the positioning plate 4 to rise, and the distance between the positioning plate 4 and the top surface of the workbench 1 increases, and the battery module 7 is placed from one side of the No. 1 limit plate 6 to the inner side of the No. 1 limit plate 6, so that the battery module 7 is against the side panel of the No. 1 limit plate 6, and the No. 2 electric push rod 23 extends to drive the moving block 5 to descend, and the moving block 5 drives the positioning plate 4 to descend, and the positioning plate 4 drives the No. 2 limit plate 26 and the No. 3 limit plate 27 to descend, and cooperate with the No. 1 limit plate 6 to complete the positioning of the battery module. At this time, the permanent magnet 19 corresponds to the position of the electromagnet 20. After completing the loading and positioning of the electrode sheet 8 in cooperation with the limit rod 12 and the connected structure, the No. 1 electric push rod 2 extends to drive the battery module 7 to move to the corresponding welding processing position.

[0036] The No. 2 limit plate 26 is used to limit the inertial displacement of the battery module 7 after the No. 1 electric push rod 2 stops extending, thereby ensuring the positioning accuracy of the battery module 7 during movement. After welding is completed, the electromagnet 20 is turned off, the No. 2 electric push rod 23 contracts, and the No. 1 electric push rod 2 contracts, so that the battery module 7 can be unloaded, thereby ensuring the feeding efficiency and positioning accuracy of the electrode sheet 8 and the battery module 7, while improving the overall feeding efficiency of the battery module 7 and the accuracy of feeding the battery module 7. The No. 2 limit plate 26 is located at the midpoint position on one side of the positioning plate 4. When the battery module at the corresponding position in the next round is loaded, the No. 2 limit plate 26 can push the battery module 7 that has completed processing in the previous round to be unloaded, thereby further improving the unloading efficiency of the battery module 7.

[0037] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A welding equipment for manufacturing lithium batteries for new energy vehicles, characterized in that: include: A workbench (1) and a positioning plate (4), wherein the positioning plate (4) is provided with a plurality of positioning grooves (25), the positioning plate (4) cooperates with the positioning grooves (25), and a positioning block group is provided inside the positioning grooves (25); The top of the workbench (1) is provided with an adjustment mechanism corresponding to the positioning plate (4), and the adjustment mechanism can drive the positioning plate (4) to move synchronously relative to the battery module (7). The adjustment mechanism can drive the positioning block group to extend and retract along the corresponding direction relative to the positioning groove (25). When the electrode sheet (8) is placed on the battery module (7), the positioning block group moves to open, and after the electrode sheet (8) is loaded, the positioning block group retracts to center the electrode sheet (8).

2. The welding equipment for manufacturing lithium batteries for new energy vehicles according to claim 1, characterized in that: The shape of the positioning groove (25) is adapted to the shape of the outer wall of the electrode sheet (8) in a horizontal state. The adjustment mechanism comprises a second limiting plate (26), the second limiting plate (26) is fixedly connected to the positioning plate (4), a third limiting plate (27) is fixedly provided on one side of the positioning plate (4), and the spacing between the second limiting plate (26) and the third limiting plate (27) is adapted to the horizontal length of the corresponding battery module.

3. A welding equipment for manufacturing lithium batteries for new energy vehicles according to claim 2, characterized in that: The adjustment mechanism further comprises a connecting seat (3), the bottom of the connecting seat (3) is fixedly connected to a first limiting plate (6), and the number of the positioning plates (4) is set to two.

4. The welding equipment for manufacturing lithium batteries for new energy vehicles according to claim 2, characterized in that: The positioning block group comprises a plurality of longitudinal positioning blocks (9), a No. 1 adjustment block (10) and a No. 2 adjustment block (11), wherein the No. 1 adjustment block (10), the No. 2 adjustment block (11) and the longitudinal positioning block (9) are all capable of extending into corresponding positioning slots (25) and being located around the electrode sheet (8).

5. The welding equipment for manufacturing lithium batteries for new energy vehicles according to claim 3, characterized in that: The regulating mechanism further comprises an air pressure regulating mechanism, wherein the size of the positioning groove (25) is larger than the size of the electrode sheet (8), and sliding grooves (13) are provided on both sides of the front and back sides of the inner wall of the positioning groove (25), and the inner side of the sliding groove (13) is slidably sleeved with a limiting rod (12), and the limiting rod (12) is T-shaped. A vent hole (14) is provided inside the positioning plate (4), and the sliding groove (13) is connected to the vent hole (14). The air pressure regulating mechanism can adjust the gas pressure in the vent hole (14), and the limiting rod (12) is used to drive the positioning block group to move.

6. The welding equipment for manufacturing lithium batteries for new energy vehicles according to claim 5, characterized in that: The air pressure regulating mechanism comprises a fixed cylinder (17), the fixed cylinder (17) being fixedly connected to the positioning plate (4), the inner side of the fixed cylinder (17) being slidably sleeved with a sliding plug (18) for separating the inner cavity of the fixed cylinder (17), a through hole (22) being provided on one side of the top of the fixed cylinder (17), a second connecting hole (16) being provided on one side of the fixed cylinder (17), a first connecting hole (15) being provided on one side of the positioning plate (4), and the first connecting hole (15) and the second connecting hole (16) being communicated with each other.

7. The welding equipment for manufacturing lithium batteries for new energy vehicles according to claim 6, characterized in that: One side of the sliding plug (18) is fixedly connected with a permanent magnet (19), one side of the connecting seat (3) near the bottom is fixedly connected with an electromagnet (20), one side inside the fixed cylinder (17) is movably provided with an adjusting spring (21), and the acting force between the electromagnet (20) and the permanent magnet (19) is a repulsive force and the magnitude of the repulsive force is greater than the elastic force of the adjusting spring (21).

8. The welding equipment for manufacturing lithium batteries for new energy vehicles according to claim 3, characterized in that: On the top of the workbench (1), a first electric push rod (2) with a quantity adapted to the quantity of the positioning plates (4) is fixedly arranged, the output end of the first electric push rod (2) is fixedly connected with the connecting seat (3), one side of the positioning plate (4) is fixedly connected with a moving block (5), the connecting seat (3) is slidably connected with the moving block (5), and on the top of the connecting seat (3), a second electric push rod (23) is fixedly arranged, and the output end of the second electric push rod (23) is fixedly connected with the moving block (5).

9. The welding equipment for manufacturing lithium batteries for new energy vehicles according to claim 3, characterized in that: On one side of the workbench (1), a laser welding assembly (24) is fixedly arranged, the first positioning plate is in a U shape and the distance between the front and back plate bodies of the first positioning plate located on the front and back of the battery module (7) is adapted to the length of the battery module (7) in the longitudinal direction.

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