Automatic alignment welding device for lithium battery tabs

Abstract

The invention discloses an automatic alignment welding device for lithium battery tabs, which relates to the technical field of lithium battery welding, and comprises a frame body, a rotating assembly and an adjusting assembly, the frame body comprises a support frame and a mounting frame, and a laser welding mechanism is mounted on one side of the mounting frame; the rotating disc drives the connecting gear to be in contact with the arc-shaped gear plate, so that the lithium battery is overturned by 180 degrees to be in a downward state, the subsequent moving state of the lithium battery is simulated, whether a tab falls or not is detected, the welding stability can be rapidly and preliminarily judged, potential problems can be found in time, and defective products are prevented from flowing into subsequent procedures; and the placing plate drives the lithium battery to rotate by taking the inner cavity as the circle center, the torsion spring is extruded, the lithium battery is inclined, the stability of the tab in a special state is further detected, the reliable welding quality is ensured, and the reliability of the product in actual use is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery welding, and in particular to an automatic alignment welding device for lithium battery tabs. Background Art

[0002] At present, with the vigorous development of the new energy field, lithium batteries are increasingly used in many industries due to their excellent performance advantages. Whether it is daily consumer electronics or large-scale industrial equipment, lithium batteries can be seen everywhere, which greatly simplifies the use of equipment. It is particularly worth mentioning that in the event of emergencies such as power outages, lithium batteries can continue to power the equipment, ensuring that the equipment maintains normal operation and providing reliable power guarantee for people's production and life.

[0003] However, the production process of lithium batteries is extremely complicated, involving many delicate process links. Among them, the tabs, as key components of lithium batteries, play a vital role in the normal use of lithium batteries. The tabs are like a "bridge" between the positive and negative poles of the lithium battery. Through its connection, the normal discharge of the positive and negative poles of the lithium battery is achieved, thereby ensuring that the battery can output electrical energy stably and efficiently.

[0004] However, in the welding process of the positive and negative electrodes of lithium batteries, since the material of the tabs is relatively soft and thin, a gap is likely to appear between the tabs and the positive and negative electrodes of the lithium battery during the welding process. This gap will lead to unsatisfactory welding results. If the lithium battery is not preliminarily inspected after welding, potential welding quality problems cannot be discovered in time. In this way, during the later use of the lithium battery, it is very likely that the tabs and the positive and negative electrodes will become desoldered and open. This will not only affect the normal performance of the lithium battery and shorten its service life, but may even cause safety accidents, bringing unnecessary losses and risks to users. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem of welding the positive and negative electrodes of lithium batteries. Since the material of the tabs is relatively soft and thin, a gap is easily formed between the tabs and the positive and negative electrodes of the lithium battery during the welding process. This gap will lead to unsatisfactory welding effect. If the lithium battery is not preliminarily inspected after welding, potential welding quality problems cannot be discovered in time. In this way, during the later use of the lithium battery, it is very likely that the tabs and the positive and negative electrodes will become desoldered and short-circuited. This will not only affect the normal performance of the lithium battery and shorten its service life, but may even cause safety accidents, bringing unnecessary losses and risks to users. Therefore, a solution is proposed.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: a lithium battery tab automatic alignment welding device: comprising a frame, the frame comprising a support frame and a mounting frame, a laser welding mechanism being installed on one side of the mounting frame, and further comprising: a rotating assembly and an adjusting assembly connected to the top of the support frame; The adjusting assembly includes a plurality of fixed columns fixedly connected to the top of the supporting frame, the top of the fixed columns is connected to a connecting plate, the inner wall of the connecting plate is fixedly connected to two arc-shaped gear plates away from each other, the top of the rotating disk included in the rotating assembly is fixedly connected to a plurality of connecting frames, and the interior of the connecting frame is rotatably connected to a rotating rod, one end of the rotating rod is fixedly connected to a connecting gear in contact with the arc-shaped gear plate, the other end of the rotating rod is fixedly connected to the fixed plate, the fixed plate is connected to the placement plate through a connecting piece, and a clamping piece is installed on the top of the placement plate; As the rotating disk continues to rotate, the arc-shaped gear plate drives the connecting gear to rotate, and drives the welded lithium battery clamped by the clamping member to rotate to observe whether the tab falls off during the rotation of the rotating disk.

[0007] As a further description of the above technical solution: The connecting piece includes an inner cavity opened on both sides of the fixed plate, the inner wall of the inner cavity is rotatably connected with an embedded column, the embedded column and the placement plate are connected by a welding plate, and a torsion spring is sleeved on the outer periphery of the embedded column.

[0008] As a further description of the above technical solution: The clamping member includes a support plate fixedly connected to the side of the placement plate, a pull rod is slidably connected inside the support plate, and one end of the pull rod extends out of the support plate and is connected to the clamping block, and a plurality of telescopic springs are connected between the support plate and the clamping block.

[0009] As a further description of the above technical solution: The inner wall of the connecting plate is fixedly connected with a circular plate, and the inner wall of the circular plate is provided with an inner groove and a return convex groove.

[0010] As a further description of the above technical solution: The length of the inner groove is longer than that of the return convex groove.

[0011] As a further description of the above technical solution: The inner wall of the connecting frame is fixedly installed with a tilting assembly, which includes a positioning plate fixedly connected to the inner wall of the connecting frame and a circular plate fixedly connected to the side of the placement plate. A sliding groove is provided inside the circular plate, and a sliding rod is slidably connected to the interior of the positioning plate. One side of the sliding rod is connected to an abutment column that contacts the inner groove and the return convex groove. A pressure spring is provided on the outer periphery of the sliding rod, and the sliding rod is connected to a sliding plate that contacts the sliding groove through a hinge.

[0012] As a further description of the above technical solution: The hinge includes a positioning frame fixedly connected to one side of the sliding rod, the inner wall of the positioning frame is fixedly connected to a first positioning rod, one side of the sliding plate is fixedly connected to two positioning blocks, the inner walls of the two positioning blocks are fixedly connected to a second positioning rod, and the second positioning rod and the first positioning rod are rotatably connected via a rotating sleeve rod.

[0013] As a further description of the above technical solution: The outer peripheries of the first positioning rod and the second positioning rod are both sleeved with torsion springs in contact with the rotating sleeve rod.

[0014] As a further description of the above technical solution: The rotating assembly includes a fixing frame fixedly connected to the top of the supporting frame, a servo motor is installed at the bottom of the fixing frame, and an output end of the servo motor is fixedly connected to the rotating disk.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: Through the adjustment component and tilt component, the rotating disk drives the connecting gear to contact the arc-shaped gear plate, causing the lithium battery to flip 180 degrees to a downward position, simulating the subsequent movement of the lithium battery and detecting whether the tab will fall off. This can quickly and preliminarily judge the welding stability, promptly discover potential problems, and prevent defective products from entering the subsequent process. After the lithium battery is flipped 180 degrees, the placement plate drives the lithium battery to rotate with the inner cavity as the center, squeezing the torsion spring to tilt the lithium battery, and further testing the stability of the tab under special conditions to ensure reliable welding quality and improve the reliability of the product in actual use; During the inspection process, the lithium battery is automatically reset through the action of components such as pressure springs and torsion springs, which facilitates subsequent operations. The rotating disk continues to rotate, causing the lithium battery to flip 180 degrees again to an upward position, making it easier for staff to disassemble and replace the lithium battery. They can also visually check whether the tabs have fallen off during the inspection process. Through multiple flipping tests, the welding quality can be judged more comprehensively and accurately to ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows a schematic diagram of the overall structure of the present invention; Figure 2 Shows a schematic structural diagram of the rotating disk of the present invention; Figure 3 The present invention is shown Figure 2 A partial enlarged view of the middle A; Figure 4 The present invention is shown Figure 2 A partial enlarged view of point B in the middle; Figure 5Shows a schematic structural diagram of the rotating assembly of the present invention; Figure 6 Shows a schematic diagram of the circular plate structure of the present invention; Figure 7 Shows a schematic structural diagram of the connecting frame of the present invention; Figure 8 Shows a schematic structural diagram of the fixing plate of the present invention; Figure 9 The present invention is shown Figure 7 A partial enlarged view of point C in the middle; Figure 10 A schematic structural diagram of the tilting assembly of the present invention is shown.

[0017] Legend: 10. Frame; 11. Support frame; 12. Mounting frame; 20. Laser welding mechanism; 30. Rotating assembly; 31. Fixed frame; 32. Servo motor; 33. Rotating disk; 40. Adjustment assembly; 41. Fixed column; 42. Connecting plate; 421. Circular plate; 422. Inner groove; 423. Return convex groove; 43. Arc gear plate; 44. Connecting frame; 441. Rotating rod; 442. Connecting gear; 443. Fixed plate; 444. Inner cavity; 445. Embedded column; 446. Welding plate; 447. Placement plate; 448. Torsion spring; 45. Support plate; 451. Pull rod; 452. Clamping block; 453. Telescopic spring; 50. Tilting assembly; 51. Circular plate; 511. Sliding groove; 52. Positioning plate; 521. Abutment column; 522. Sliding rod; 523. Pressure spring; 53. Positioning frame; 531. First positioning rod; 532. Rotating sleeve rod; 533. Second positioning rod; 534. Positioning block; 54. Sliding plate. DETAILED DESCRIPTION

[0018] 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 any creative efforts shall fall within the scope of protection of the present invention.

[0019] like Figures 1-10 As shown, the present invention provides an automatic alignment welding device for lithium battery tabs, which includes a frame 10 , wherein the frame 10 includes a support frame 11 and a mounting frame 12 , and a laser welding mechanism 20 is installed on one side of the mounting frame 12 .

[0020] like Figure 1 、 Figure 2 、 Figure 5 As shown, it also includes: a rotating assembly 30 and an adjusting assembly 40 connected to the top of the support frame 11; the rotating assembly 30 includes a fixing frame 31 fixedly connected to the top of the support frame 11, a servo motor 32 is installed at the bottom of the fixing frame 31, and the output end of the servo motor 32 is fixedly connected to the rotating disk 33; When the lithium battery and the tab need to be welded, the servo motor 32 needs to be started so that the servo motor 32 drives the rotating disk 33 to rotate.

[0021] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 As shown, the adjustment component 40 includes a plurality of fixed columns 41 fixedly connected to the top of the support frame 11, the top of the fixed column 41 is connected to a connecting plate 42, the inner wall of the connecting plate 42 is fixedly connected to two arc-shaped gear plates 43 that are far away from each other, the top of the rotating disk 33 included in the rotating component 30 is fixedly connected to a plurality of connecting frames 44, and the internal rotation of the connecting frame 44 is connected to a rotating rod 441, one end of the rotating rod 441 is fixedly connected to a connecting gear 442 that contacts the arc-shaped gear plate 43, and the other end of the rotating rod 441 is fixedly connected to a fixed plate 443, and the fixed plate 443 is connected to a placement plate 447 through a connecting piece, and the connecting piece includes an inner cavity 444 opened on both sides of the fixed plate 443, and the inner wall of the inner cavity 444 is rotatably connected to an embedded column 445, and the embedded column 445 is connected to the placement plate The 447 are connected by welding plates 446, and the outer periphery of the embedded column 445 is provided with a torsion spring 448. In the initial state of the torsion spring 448, the elastic force can push the placement plate 447 and the fixed plate 443 to be in the same straight line, and a clamping member is installed on the top of the placement plate 447. The clamping member includes a support plate 45 fixedly connected to the side of the placement plate 447, and a pull rod 451 is slidably connected to the inside of the support plate 45, and one end of the pull rod 451 extends out of the support plate 45 and is connected to the clamping block 452. A number of telescopic springs 453 are connected between the support plate 45 and the clamping block 452. The inner wall of the connecting plate 42 is fixedly connected to the circular plate 421, and the inner wall of the circular plate 421 is provided with an inner groove 422 and a return convex groove 423. The length of the inner groove 422 is longer than the return convex groove 423. Before welding the lithium battery and the tab, the lithium battery must be installed and fixed on the placement plate 447. The specific operation is as follows: first, use both hands to pull the pulling rods 451 on both sides of the placement plate 447. The pulling rods 451 are forced to move and drive the clamping blocks 452 to move synchronously. During this process, the clamping blocks 452 will exert pressure on the telescopic springs 453, causing them to be in a squeezed state, thereby gradually expanding the distance between the two clamping blocks 452 to make room for the placement of the lithium battery. After the lithium battery is placed, release the pulling rod 451. At this time, the telescopic springs 453 in the squeezed state return to their original state, generating a rebound force to push the clamping blocks 452 to move toward the lithium battery until the clamping blocks 452 tightly clamp the two sides of the lithium battery. At this point, the lithium battery is installed and fixed. After the lithium battery is installed and fixed, the servo motor 32 is started, which drives the rotating disk 33 to rotate, and the lithium battery installed on the rotating disk 33 also moves accordingly. When the rotating disk 33 rotates 90 degrees, the fixed lithium battery is just under the laser welding mechanism 20. Then, the tab is placed on the designated welding position of the lithium battery, and the laser welding mechanism 20 is started to use the high-energy laser beam it generates to weld the tab to the lithium battery. After the tabs are welded to the lithium battery, in order to preliminarily detect the stability of the tabs after welding, the rotating disk 33 continues to rotate. During the rotation, the connecting gear 442 will contact the arc-shaped gear plate 43 and rotate under the action of the contact force. When the connecting gear 442 rotates, it will drive the rotating rod 441 connected to it to rotate synchronously in the connecting frame 44. The rotation of the rotating rod 441 further drives the fixed plate 443 to rotate. As the fixed plate 443 moves, the placement plate 447 connected to the welding plate 446 on one side of the embedded column 445 will also rotate. When the connecting gear 442 is out of contact with the arc-shaped gear plate 43, the welded lithium battery has been flipped 180 degrees and is in a downward state. Through this flipping operation, the state of the lithium battery in the subsequent movement process can be simulated to detect whether the welded tabs will fall off during the movement, thereby preliminarily judging the stability of the welding. You can refer to Figure 3 , Figure 3 The flipped state.

[0022] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 10As shown, a tilting assembly 50 is fixedly installed on the inner wall of the connecting frame 44. The tilting assembly 50 includes a positioning plate 52 fixedly connected to the inner wall of the connecting frame 44 and a circular plate 51 fixedly connected to the side of the placement plate 447. A sliding groove 511 is provided inside the circular plate 51. A sliding rod 522 is slidably connected to the interior of the positioning plate 52. One side of the sliding rod 522 is connected to an abutment column 521 that contacts the inner groove 422 and the return convex groove 423. A pressure spring 523 is provided on the outer periphery of the sliding rod 522. The elastic force of the pressure spring 523 is greater than that of the torsion spring 448. The sliding rod 522 is connected to a sliding plate 54 that contacts the sliding groove 511 through a hinge. The circular plate 51, the sliding groove 511 and the sliding plate 54 are all centered on the rotating rod 441. The hinge includes a positioning frame 53 fixedly connected to one side of the sliding rod 522, the inner wall of the positioning frame 53 is fixedly connected to the first positioning rod 531, and one side of the sliding plate 54 is fixedly connected to two positioning blocks 534, and the inner walls of the two positioning blocks 534 are fixedly connected to the second positioning rod 533. The second positioning rod 533 and the first positioning rod 531 are rotatably connected by a rotating sleeve rod 532. The outer peripheries of the first positioning rod 531 and the second positioning rod 533 are sleeved with torsion springs in contact with the rotating sleeve rod 532. The elastic force of the torsion spring on the outer periphery of the first positioning rod 531 is greater than the elastic force of the torsion spring on the outer periphery of the second positioning rod 533. In the initial state of the two torsion springs, the elastic force can push the rotating sleeve rod 532 and the sliding plate 54 to maintain the same horizontal straight line with the sliding rod 522; After the lithium battery is flipped 180 degrees, the placement plate 447 drives the circular plate 51 to rotate together. As the circular plate 51 rotates, the sliding groove 511 provided thereon contacts the sliding plate 54. At the same time, the rotating disk 33 continues to rotate, and the abutment column 521, which is always in contact with the inner wall of the circular plate 421, gradually approaches and eventually contacts the inner groove 422 on the inner wall of the circular plate 421. When the abutment column 521 is out of contact with the inner wall of the circular plate 421, the pressure spring 523, which was originally in a squeezed state, begins to rebound. The rebound force of the pressure spring 523 pushes the abutment column 521 toward the inner groove 422. During the movement of the abutment column 521, the sliding rod 522 is driven to move synchronously in the positioning plate 52. The movement of the sliding rod 522 further pulls the rotating sleeve rod 532 connected to the first positioning rod 531 on the inner wall of the positioning frame 53 to move. When the rotating sleeve rod 532 moves, it pulls the sliding plate 54 connected to the positioning blocks 534 on both sides of the second positioning rod 533 to move. The movement of the sliding plate 54 drives the placement plate 447 connected to the circular plate 51 to rotate around the inner cavity 444 as the center of the circle. During the rotation of the placement plate 447, the embedded column 445 will squeeze the torsion spring 448. At the same time, the lithium battery in the flipped state will also tilt. By setting this tilt angle, it is possible to further detect whether the tab will fall under special conditions, such as Figure 4 The figure shows the flipped and tilted state; As the circular plate 51 continues to rotate, the rotating sleeve 532 will move and rotate around the first positioning rod 531 and the second positioning rod 533, and compress the torsion spring. When the rotating disk 33 continues to rotate, the abutting post 521 will gradually break away from the contact with the inner groove 422 and contact the return convex groove 423 on the inner wall of the circular plate 421. After the abutting post 521 abuts against the return convex groove 423, it will move as the rotating disk 33 continues to rotate, squeezing the pressure spring 523 during the movement, and gradually moving the sliding rod 522 back to its original position. When the sliding rod 522 returns to its original position, the elastic force generated by the torsion spring will push the rotating sleeve rod 532 and the sliding plate 54, so that they remain in the same horizontal straight line with the sliding rod 522. At this time, the sliding plate 54 pushes the circular plate 51 to move, and under the combined action of the elastic force of the torsion spring 448, the placement plate 447 and the fixed plate 443 are driven to return to the same horizontal straight line position; Subsequently, the rotating disk 33 continues to rotate, and the connecting gear 442 contacts the arc-shaped gear plate 43 again and starts to rotate. The rotation of the connecting gear 442 drives the rotating rod 441 to rotate in the connecting frame 44, and at the same time drives the fixed plate 443 to rotate. As the fixed plate 443 rotates, the placement plate 447 connected to the welding plate 446 on one side of the embedded column 445 also rotates together. When the connecting gear 442 is out of contact with the arc-shaped gear plate 43, the lithium battery flips over one hundred and eighty degrees again and becomes an upward state. At this time, the staff can easily disassemble and replace the lithium battery, and at the same time see whether the tab falls off during the inspection process.

[0023] Working principle: Before welding the lithium battery to the tab, the lithium battery must be installed and fixed on the placement plate 447. The specific operation is: use both hands to pull the pull rods 451 on both sides of the placement plate 447. The pull rods 451 drive the clamping blocks 452 to move, exerting pressure on the telescopic spring 453 to put it in a squeezed state. The distance between the two clamping blocks 452 is expanded to make room for the lithium battery. After the lithium battery is placed, release the pull rod 451, and the telescopic spring 453 returns to its original state to generate rebound force, pushing the clamping blocks 452 to clamp the two sides of the lithium battery, completing the installation and fixation. After the installation is completed, the servo motor 32 is started to drive the rotating disk 33 to rotate, and the lithium battery installed on the rotating disk 33 moves accordingly. When the rotating disk 33 rotates 90 degrees, the lithium battery is directly under the laser welding mechanism 20. The tab is placed at the designated welding position of the lithium battery, and the laser welding mechanism 20 is started to use a high-energy laser beam to weld the tab to the lithium battery. After welding is completed, in order to preliminarily detect the stability of the tab, the rotating disk 33 continues to rotate, the connecting gear 442 contacts and rotates with the arc-shaped gear plate 43, driving the rotating rod 441 to rotate synchronously in the connecting frame 44, thereby driving the fixed plate 443 to rotate, causing the placement plate 447 to rotate accordingly. When the connecting gear 442 is separated from the arc-shaped gear plate 43, the lithium battery has flipped 180 degrees and is facing downward, thereby simulating the subsequent movement state of the lithium battery to detect whether the tab will fall off and preliminarily judge the welding stability; After the lithium battery is turned 180 degrees, the placement plate 447 drives the circular plate 51 to rotate, and the sliding groove 511 on the circular plate 51 contacts the sliding plate 54. At the same time, the rotating disk 33 continues to rotate, and the abutment column 521 gradually approaches and contacts the inner groove 422 on the inner wall of the circular plate 421. When the abutment column 521 is separated from the inner wall of the circular plate 421, the pressure spring 523 rebounds, pushing the abutment column 521 toward the inner groove 422, driving the sliding rod 522 to move synchronously in the positioning plate 52. The sliding rod 522 moves to pull the rotating sleeve rod 532 on the first positioning rod 531 on the inner wall of the positioning frame 53 to move, and the rotating sleeve rod 532 pulls the sliding plate 54 connected to the positioning blocks 534 on both sides of the second positioning rod 533 to move, thereby driving the placement plate 447 connected to the circular plate 51 to rotate with the inner cavity 444 as the center. During the rotation, the embedded column 445 squeezes the torsion spring 448, and the lithium battery tilts accordingly, further detecting whether the tab will fall under special conditions; When the cam 522 is in the same horizontal position as the cam 522, the cam 522 is in the same horizontal position as the cam 522. When the cam 522 is in the same horizontal position as the cam 522, the cam 522 is in the same horizontal position as the cam 522. When the cam 522 is in the same horizontal position as the cam 522, the cam 522 is in the same horizontal position as the cam 522. Subsequently, the rotating disk 33 continues to rotate, and the connecting gear 442 contacts and rotates with the arc-shaped gear plate 43 again, driving the rotating rod 441 to rotate in the connecting frame 44, so that the fixed plate 443 moves, and then drives the placement plate 447 to rotate. When the connecting gear 442 is separated from the arc-shaped gear plate 43, the lithium battery flips over 180 degrees again to an upward state. The staff can easily disassemble and replace the lithium battery, and check whether the tabs fall off during the inspection process.

[0024] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A lithium battery tab automatic alignment welding device, comprising a frame (10), the frame (10) comprising a support frame (11) and a mounting frame (12), a laser welding mechanism (20) being installed on one side of the mounting frame (12), characterized in that: Also includes: A rotating assembly (30) and an adjusting assembly (40) connected to the top of the support frame (11); The adjusting assembly (40) includes a plurality of fixed columns (41) fixedly connected to the top of the support frame (11), a connecting plate (42) is connected to the top of the fixed columns (41), and two arc-shaped gear plates (43) that are separated from each other are fixedly connected to the inner wall of the connecting plate (42), and a plurality of connecting frames (44) are fixedly connected to the top of the rotating disk (33) included in the rotating assembly (30), and the inner part of the connecting frame (44) is rotatably connected to a rotating rod (441), one end of the rotating rod (441) is fixedly connected to a connecting gear (442) that contacts the arc-shaped gear plate (43), and the other end of the rotating rod (441) is fixedly connected to a fixed plate (443), and the fixed plate (443) is connected to a placement plate (447) through a connecting piece, and a clamping piece is installed on the top of the placement plate (447); As the rotating disk (33) continues to rotate, the arc-shaped gear plate (43) drives the connecting gear (442) to rotate, and drives the welded lithium battery clamped by the clamping member to rotate, so as to observe whether the tab falls off during the rotation of the rotating disk (33).

2. The automatic alignment welding device for lithium battery tabs according to claim 1, characterized in that: The connecting member includes an inner cavity (444) opened on both sides of the fixed plate (443), the inner wall of the inner cavity (444) is rotatably connected to an embedded column (445), the embedded column (445) is connected to the placement plate (447) through a welding plate (446), and a torsion spring (448) is provided on the outer periphery of the embedded column (445).

3. The automatic alignment welding device for lithium battery tabs according to claim 1, characterized in that: The clamping member includes a support plate (45) fixedly connected to the side of the placement plate (447), a pull rod (451) is slidably connected inside the support plate (45), and one end of the pull rod (451) extends out of the support plate (45) and is connected to the clamping block (452), and a plurality of telescopic springs (453) are connected between the support plate (45) and the clamping block (452).

4. The automatic alignment welding device for lithium battery tabs according to claim 1, characterized in that: The inner wall of the connecting plate (42) is fixedly connected to a circular plate (421), and the inner wall of the circular plate (421) is provided with an inner groove (422) and a return convex groove (423).

5. The automatic alignment welding device for lithium battery tabs according to claim 4, characterized in that: The inner groove (422) is longer than the return convex groove (423).

6. The automatic alignment welding device for lithium battery tabs according to claim 5, characterized in that: A tilting assembly (50) is fixedly mounted on the inner wall of the connecting frame (44). The tilting assembly (50) includes a positioning plate (52) fixedly connected to the inner wall of the connecting frame (44) and a circular plate (51) fixedly connected to the side of the placement plate (447). A sliding groove (511) is provided inside the circular plate (51). A sliding rod (522) is slidably connected inside the positioning plate (52). One side of the sliding rod (522) is connected to an abutting column (521) in contact with the inner groove (422) and the return convex groove (423). A pressure spring (523) is sleeved on the outer periphery of the sliding rod (522). The sliding rod (522) is connected to the sliding plate (54) in contact with the sliding groove (511) through a hinge.

7. The automatic alignment welding device for lithium battery tabs according to claim 6, characterized in that: The hinged member comprises a positioning frame (53) fixedly connected to one side of the sliding rod (522); a first positioning rod (531) is fixedly connected to the inner wall of the positioning frame (53); two positioning blocks (534) are fixedly connected to one side of the sliding plate (54); the inner walls of the two positioning blocks (534) are fixedly connected to the second positioning rod (533); and the second positioning rod (533) and the first positioning rod (531) are rotatably connected via a rotating sleeve rod (532).

8. The automatic alignment welding device for lithium battery tabs according to claim 7, characterized in that: The outer peripheries of the first positioning rod (531) and the second positioning rod (533) are both sleeved with torsion springs that are in contact with the rotating sleeve rod (532).

9. The automatic alignment welding device for lithium battery tabs according to claim 1, characterized in that: The rotating assembly (30) includes a fixing frame (31) fixedly connected to the top of the supporting frame (11), a servo motor (32) is installed at the bottom of the fixing frame (31), and an output end of the servo motor (32) is fixedly connected to the rotating disk (33).

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