A cap resistance welding device for lithium battery production

Abstract

The present invention relates to the technical field of lithium battery production, and particularly relates to a cap resistance welding device for lithium battery production, including a processing table and a resistance welding mechanism arranged on the processing table. A blanking mechanism for blanking the caps after welding is arranged on the processing table. A placement table is arranged below the discharge hopper of the blanking mechanism. A fixing frame for storing collection boxes is fixedly connected to the top of the placement table. A moving table is arranged on the side wall of the placement table and away from one end of the fixing frame. A transfer cart for placing collection boxes is arranged on the moving table. A moving mechanism for driving the transfer cart to move at a fixed distance is arranged on the moving table. A pair of bottom plates are fixedly connected to the bottom of the placement table. The present invention can not only automatically replace the collection boxes, but also automatically place the collection boxes on the transfer cart, which is not only time-saving and labor-saving, but also does not require workers to stay beside the machine for a long time. It only needs to push away the transfer cart regularly, greatly improving the convenience performance of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and particularly to a cap resistance welding device for lithium battery production. Background Art

[0002] A lithium battery is a battery with a lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. During the assembly process of a lithium battery, it is necessary to resistance weld a cap onto the lithium battery. Resistance welding refers to applying a certain pressure to the assembled weldment in a heated or unheated state, causing it to undergo plastic deformation or melting, and through recrystallization, diffusion, and other effects, enabling the atoms on the two separated surfaces to form a metal bond for connection.

[0003] In the prior art, a lithium battery cap resistance welding device with the publication number of CN118385715A places the battery cap inside a guide cylinder, and the lowermost battery cap will fall into the cap hole on the push plate. Starting the air cylinder can push the push plate to move along the first guide groove, making the push plate move directly above the conveying plate, so that the battery cap lands on the upper end of the battery on the conveying plate. Starting the hydraulic cylinder enables the resistance welder to perform cap resistance welding on the battery, achieving automatic cap placement with high precision, avoiding the problem of cap resistance welding failure caused by offset cap placement, and improving the production and processing efficiency of lithium batteries.

[0004] Although it improves the resistance welding efficiency of lithium battery caps, there are still some problems in actual use. Since the caps after resistance welding will fall into the collection box concentratedly, however, this resistance welding device cannot automatically replace the collection box. Therefore, when the collection box is full, workers still need to replace it. And the existing resistance welding device has a high working efficiency, so the time when the collection box is full is very short. As a result, workers need to stay beside the machine for a long time to replace it, which is not only time-consuming and laborious, but also greatly reduces the convenience performance of the device.

[0005] Therefore, a cap resistance welding device for lithium battery production is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the drawbacks existing in the background art, and a cap resistance welding device for lithium battery production is proposed.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: A cap pressure welding device for lithium battery production, including a processing table, and a pressure welding mechanism provided on the processing table. A blanking mechanism for blanking the welded cap is provided on the processing table. A placement table is provided below the discharge hopper of the blanking mechanism. A fixed frame for storing collection boxes is fixedly connected to the top of the placement table. A moving table is provided on the side wall of the placement table and away from one end of the fixed frame. A transfer cart for placing collection boxes is provided on the moving table. A moving mechanism for driving the transfer cart to move at a fixed distance is provided on the moving table. A pair of bottom plates are fixedly connected to the bottom of the placement table. A reciprocating screw rod is rotatably connected between the bottom plates. A chute is opened at the middle position of the top of the placement table. A sliding block is threadedly connected through the outer wall of the reciprocating screw rod. A pair of hinge plates are fixedly connected to the top of the sliding block. A push plate is rotatably connected between the hinge plates. A limiting plate is fixedly connected to the bottom end of the side wall of the push plate. The output end of a driving motor fixedly connected to the side wall of one of the bottom plates passes through the side wall of the bottom plate and is fixedly connected to the side wall of the reciprocating screw rod. A discharge port is opened at the bottom of the fixed frame near the baffle plate side.

[0008] In the above technical solution, further, a guide rod is fixedly connected between the bottom plates, and the guide rod penetrates through the inner side wall of the sliding block.

[0009] In the above technical solution, further, baffles are fixedly connected to both sides of the top of the placement table and below the discharge hopper of the blanking mechanism. A side port is opened on the side of the fixed frame away from the discharge port. The height of the push plate is higher than the top end of the placement table. A return spring is fixedly connected between the side wall of the limiting plate and the top of the sliding block.

[0010] In the above technical solution, further, the moving mechanism includes a moving frame. A recessed groove is opened at the top of the moving table. A top plate is provided inside the groove. A moving groove is opened through the side wall of the groove. The moving frame is slidably connected inside the moving groove. A pair of connecting rods are fixedly connected between the moving frame and the sliding block. A side plate is fixedly connected to the side wall of the moving frame. A moving rod is slidably connected through the top of the side plate. A plurality of transverse grooves are equidistantly opened at the bottom of the top plate. Oblique grooves are opened between the plurality of transverse grooves. The two ends of the oblique groove are communicated with the far ends of the adjacent two transverse grooves. Card slots are opened on the inner side of the oblique groove and away from the placement table side. The top end of the moving rod is inserted into one of the transverse grooves. A limiting mechanism for restricting the position of the transfer cart is provided on the top plate.

[0011] In the above technical solution, further, sliding frames are provided on both sides of the bottom of the top plate, and the sliding frames are horizontally slidably connected to the inside of the grooves. Compression blocks are fixedly connected to both sides of the bottom of the top plate, and the compression blocks are slidably connected to the inside of the sliding frames. A pair of upper springs are fixedly connected between the inside of the sliding frames and the bottoms of the compression blocks. One of the side walls of the sliding frame is fixedly connected to a pull rod, and the pull rod penetrates through the moving groove.

[0012] In the above technical solution, further, a positioning plate is fixedly connected to the bottom of the moving rod, and a lower spring sleeved on the outside of the moving rod is fixedly connected between the top of the positioning plate and the bottom of the side plate. The top of the moving rod is provided with a smooth arc surface, and the connection between the card slot and the inclined slot is inclined.

[0013] In the above technical solution, further, the limiting mechanism includes a lower frame, the lower frame is fixedly connected to the middle position of the top of the top plate, and an upper frame is fixedly connected to the bottom of the transfer cart at a position corresponding to the lower frame. A limiting block is slidably connected to the inside of the lower frame, the limiting block is inserted into the inside of the upper frame, and a plurality of limiting springs are fixedly connected between the bottom end inside the lower frame and the limiting block. The side wall of the limiting block is inclined, and a release plate is fixedly connected to the side wall of the limiting block, and the release plate penetrates through the side wall of the lower frame.

[0014] In the above technical solution, further, inclined blocks are fixedly connected to both sides of the outer wall of the moving table, and a fence is fixedly connected to the top of the moving table on the side away from the placing table. A touch sensor is fixedly connected through the inside of the cross groove on the side away from the placing table. The touch sensor is arranged on the side away from the moving rod and on the side away from the top plate. An alarm is fixedly connected to the outer wall of the moving table, and the touch sensor is electrically connected to the alarm through a controller.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention can not only automatically replace the collection box, but also automatically place the collection box on the transfer cart, which is not only time-saving and labor-saving, but also does not require the staff to stay beside the machine for a long time. Only the transfer cart needs to be pushed away regularly, greatly improving the convenience performance of the device.

[0017] 2. Through the mutual cooperation of the moving mechanism and the limiting mechanism, the present invention can automatically change the position of the collection box placed on the transfer cart next time after replacing the collection box, further improving the convenience performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front three-dimensional structural schematic diagram of the pressure welding device of the present invention;

[0019] Figure 2Schematic diagram of the upward perspective three-dimensional structure of the placement table and the moving table of the present invention;

[0020] Figure 3 Schematic diagram of the side full-section three-dimensional structure of the placement table of the present invention;

[0021] Figure 4 Of the present invention Figure 3 Schematic diagram of the partial enlarged structure at location A;

[0022] Figure 5 Of the present invention Figure 3 Schematic diagram of the partial enlarged structure at location B;

[0023] Figure 6 Schematic diagram of the upward perspective sectional structure of the top plate of the present invention;

[0024] Figure 7 Schematic diagram of the front full-section three-dimensional structure of the top plate of the present invention;

[0025] Figure 8 Of the present invention Figure 7 Schematic diagram of the partial enlarged structure at location C;

[0026] Figure 9 Schematic diagram of the upward perspective three-dimensional structure of the transporter of the present invention.

[0027] In the figure: 1, processing table; 2, pressure welding mechanism; 3, blanking mechanism; 4, placement table; 5, fixed frame; 6, baffle; 7, moving table; 8, transporter; 9, bottom plate; 10, reciprocating lead screw; 11, chute; 12, sliding block; 13, hinge plate; 14, push plate; 15, limiting plate; 16, drive motor; 17, guide rod; 18, discharge port; 19, side port; 20, moving frame; 21, groove; 22, top plate; 23, moving groove; 24, sliding frame; 25, compression block; 26, upper spring; 27, connecting rod; 28, side plate; 29, moving rod; 30, transverse groove; 31, inclined groove; 32, card slot; 33, lower spring; 34, pull rod; 35, lower frame; 36, upper frame; 37, limiting block; 38, limiting spring; 39, inclined block; 40, fence; 41, touch sensor; 42, alarm; 43, reset spring; 44, release plate; 45, positioning plate. Detailed implementation manners

[0028] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0029] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed below.

[0030] As shown Figures 1-9 A cap pressure welding device for lithium battery production, including a processing table 1 and a pressure welding mechanism 2 arranged on the processing table 1. The pressure welding mechanism 2 is a mature technology in the prior art, so it will not be described in detail here. A blanking mechanism 3 for welding and completing cap blanking is arranged on the processing table 1. The blanking mechanism 3 is mainly composed of a blanking robotic arm and a blanking hopper and other structures. A placing table 4 is arranged below the discharge hopper of the blanking mechanism 3. A fixed frame 5 for storing collection boxes is fixedly connected to the top of the placing table 4. A moving table 7 is arranged on the side wall of the placing table 4 and away from one end of the fixed frame 5. A transfer vehicle 8 for placing collection boxes is arranged on the moving table 7. After the transfer vehicle 8 moves onto the moving table 7, the upper surface of the transfer vehicle 8 is flush with the upper surface of the placing table 4. A moving mechanism for driving the transfer vehicle 8 to move at a fixed distance is arranged on the moving table 7. A pair of bottom plates 9 are fixedly connected to the bottom of the placing table 4. A reciprocating lead screw 10 is rotatably connected between the bottom plates 9. A chute 11 is opened at the middle position of the top of the placing table 4. A sliding block 12 is threadedly connected through the outer wall of the reciprocating lead screw 10. A pair of hinge plates 13 are fixedly connected to the top of the sliding block 12. A push plate 14 is rotatably connected between the hinge plates 13. A limiting plate 15 is fixedly connected to the bottom end of the side wall of the push plate 14. A driving motor 16 is fixedly connected to the side wall of one of the bottom plates 9. The output end of the driving motor 16 passes through the side wall of the bottom plate 9 and is fixedly connected to the side wall of the reciprocating lead screw 10. A discharge port 18 is opened at the bottom of the fixed frame 5 near the baffle 6. Through the discharge port 18, it is convenient for the collection box to slide out;

[0031] In order to improve the stability during the operation of the device, a guide rod 17 is fixedly connected between the bottom plates 9, and the guide rod 17 is arranged through the inner side wall of the sliding block 12. Through the arrangement of the guide rod 17, it can play a guiding role during the process of the reciprocating lead screw 10 rotating to drive the sliding block 12 to move, avoid the sliding block 12 rotating together with the reciprocating lead screw 10, and improve the stability during the operation of the device.

[0032] In order to further improve the stability during the operation of the device, baffles 6 are fixedly connected to both sides of the top of the placing table 4 and below the discharge hopper of the blanking mechanism 3. Through the arrangement of the baffles 6, the position of the pushed collection box can be restricted, ensuring that the collection box can be pushed to the designated position and avoiding the collection box from falling. A side port 19 is opened on the side of the fixed frame 5 away from the discharge port 18. Through the side port 19, the normal movement of the push plate 14 is avoided, and the height of the push plate 14 is higher than the top end of the placing table 4. A return spring 43 is fixedly connected between the side wall of the limiting plate 15 and the top of the sliding block 12. Through the arrangement of the return spring 43, it is convenient to pull the limiting plate 15 to quickly reset and keep the push plate 14 in a vertical state.

[0033] In order to automatically change the position of the collection box placed on the transfer vehicle 8 after replacing the collection box, the moving mechanism includes a moving frame 20. A recessed groove 21 is formed at the top of the moving platform 7. A top plate 22 is provided inside the groove 21. A moving groove 23 is formed through the side wall of the groove 21. The moving frame 20 is slidably connected to the inside of the moving groove 23. A pair of connecting rods 27 are fixedly connected between the moving frame 20 and the sliding block 12. A side plate 28 is fixedly connected to the side wall of the moving frame 20. A moving rod 29 is slidably connected through the top of the side plate 28. A plurality of horizontal grooves 30 are equidistantly formed at the bottom of the top plate 22. An inclined groove 31 is formed between the plurality of horizontal grooves 30. The two ends of the inclined groove 31 are communicated with the far ends of two adjacent horizontal grooves 30. A clamping groove 32 is formed on the inner side of the inclined groove 31 and away from the placing table 4. The top end of the moving rod 29 is inserted into one of the horizontal grooves 30. A limiting mechanism for restricting the position of the transfer vehicle 8 is provided on the top plate 22. A positioning plate 45 is fixedly connected to the bottom of the moving rod 29. A lower spring 33 sleeved on the outside of the moving rod 29 is fixedly connected between the top of the positioning plate 45 and the bottom of the side plate 28. The top of the moving rod 29 is set as a smooth arc surface. The connection between the clamping groove 32 and the inclined groove 31 is inclined;

[0034] Sliding frames 24 are provided on both sides of the bottom of the top plate 22. The sliding frames 24 are horizontally slidably connected to the inside of the groove 21. Compression blocks 25 are fixedly connected to both sides of the bottom of the top plate 22. The compression blocks 25 are slidably connected to the inside of the sliding frames 24. A pair of upper springs 26 are fixedly connected between the inside of the sliding frames 24 and the bottom of the compression blocks 25. A pull rod 34 is fixedly connected to the side wall of one of the sliding frames 24 and the pull rod 34 penetrates through the moving groove 23. Through the arrangement of the pull rod 34, it is convenient to pull the sliding frames 24 and the top plate 22 to move. And there is a certain distance between the last horizontal groove 30 and the pull rod 34. Therefore, the pull rod 34 will not be blocked by the moving frame 20;

[0035] In order to ensure the stability of the transfer vehicle 8 during the movement on the top plate 22, the limiting mechanism includes a lower frame 35. The lower frame 35 is fixedly connected to the middle position of the top of the top plate 22. An upper frame 36 is fixedly connected to the bottom of the transfer vehicle 8 at a position corresponding to the lower frame 35. A limiting block 37 is slidably connected to the inside of the lower frame 35. The limiting block 37 is inserted into the upper frame 36. A plurality of limiting springs 38 are fixedly connected between the bottom end inside the lower frame 35 and the limiting block 37. The side wall of the limiting block 37 is inclined, which is convenient for the upper frame 36 to squeeze the limiting block 37 to slide down during the process of pushing the transfer vehicle 8 onto the top plate 22, facilitating the transfer vehicle 8 to quickly move onto the top plate 22. A release plate 44 is fixedly connected to the side wall of the limiting block 37 and the release plate 44 penetrates through the side wall of the lower frame 35;

[0036] To improve the practical performance of the device, inclined blocks 39 are fixedly connected to both outer walls of the mobile station 7. Through the arrangement of the inclined blocks 39, it is convenient for the staff to push the transfer vehicle 8 onto the mobile station 7, improving the convenience performance of the device. Moreover, a fence 40 is fixedly connected to the top end of the mobile station 7 and on the side away from the placement table 4. Through the fence 40, the position of the transfer vehicle 8 on the mobile station 7 can be restricted, improving the stability of the device. A touch sensor 41 is fixedly connected through the inside of the transverse groove 30 on the side away from the placement table 4, and the touch sensor 41 is arranged on the side away from the moving rod 29 and on the side away from the top plate 22. An alarm 42 is fixedly connected to the outer wall of the mobile station 7. The touch sensor 41 is electrically connected to the alarm 42 through a controller. Through the arrangement of the touch sensor 41 and the alarm 42, when the collection box on the transfer vehicle 8 is full, the moving rod 29 will move to the end of the last transverse groove 30 under the drive of the sliding block 12. At this time, the moving rod 29 will touch the touch sensor 41, and then the touch sensor 41 will transmit a signal to the controller. The controller controls the alarm 42 to be powered on, thereby emitting an alarm sound and a warning light to remind the staff that the transfer vehicle 8 needs to be replaced, improving the practical performance of the device.

[0037] Before performing pressure welding on the lithium battery cap, first place the empty collection box into the fixed frame 5 in sequence. At the same time, push the transfer vehicle 8 onto the moving platform 7, and limit the position of the transfer vehicle 8 through the limiting mechanism. Subsequently, during the operation of the pressure welding mechanism 2, the caps that have completed pressure welding are discharged through the blanking mechanism 3 and fall into the collection box on the placement table 4. Then, when the collection box is full, the drive motor 16 can be controlled to start (it should be noted here that the drive motor 16 can be started regularly by the timing controller according to the production capacity, thereby realizing the automatic replacement of the device without the need for workers to operate). Then, the drive motor 16 drives the reciprocating lead screw 10 to rotate, driving the sliding block 12 connected by threads to move, and then driving the push plate 14 to slide inside the chute 11. Subsequently, when the push plate 14 passes through the side port 19, since the limiting plate 15 on the side wall of the push plate 14 abuts against the top of the sliding block 12, the flipping position of the push plate 14 to one side will be restricted. Therefore, the push plate 14 will push the collection box in the fixed frame 5 to move, enabling the collection box to pass through the discharge port 18. Subsequently, the removed collection box will move next to the full collection box. Then, through the continuous pushing of the push plate 14, the empty collection box will push the full collection box to move on the placement table 4, so as to push the empty collection box under the blanking hopper of the blanking mechanism 3 and push the full collection box onto the transfer vehicle 8. Then, the sliding block 12 moves to the end of the reciprocating lead screw 10, and then, driven by the reciprocating lead screw 10, the sliding block 12 moves in the reverse direction to reset. During this process, when the empty collection box in the fixed frame 5 is removed, the stacked collection boxes above it will slide down under gravity. Subsequently, when the push plate 14 moves to the discharge port 18, since there is no restriction on the other side of the push plate 14, the push plate 14 will flip around the hinge point under the obstruction of the collection box, simultaneously driving the limiting plate 15 to flip and stretching the return spring 43. Then, the push plate 14 passes through under the collection box and moves out of the fixed frame 5, thus losing the limitation on the push plate 14. Under the elastic force of the return spring 43, the limiting plate 15 and the push plate 14 are pulled to flip and reset. Repeating this process, the automatic replacement of the collection box is realized, and the full collection box is automatically placed on the transfer vehicle 8, which not only saves time and effort but also does not require workers to stay beside the machine for a long time. Just push away the transfer vehicle 8 regularly, greatly improving the convenience performance of the device.

[0038] During the process of replacing the collection box while the driving motor 16 is running, the movement of the sliding block 12 will drive the connecting rod 27, the moving frame 20 and the side plate 28 to move simultaneously, thereby driving the moving rod 29 to slide inside the transverse groove 30. Subsequently, when the push plate 14 completely pushes the full collection box onto the transfer vehicle 8, at this time, the moving rod 29 moves below the card slot 32, and then under the elastic force of the lower spring 33, the top end of the moving rod 29 is pushed into the card slot 32. Since there is a step between the card slot 32 and the transverse groove 30, and the connection between the card slot 32 and the inclined groove 31 is an inclined surface, when the reciprocating lead screw 10 drives the sliding block 12 to move back and reset, it will pull the moving rod 29 to slide inside the card slot 32 first, and then slide out of the card slot 32 and into the inclined groove 31, while pushing down and squeezing the moving rod 29 and stretching the lower spring 33;

[0039] And because the sliding block 12 and the moving frame 20 can only slide longitudinally, the moving rod 29 will gradually squeeze the top plate 22 to slide inside the groove 21, and at the same time drive the sliding frame 24 to move, thereby driving the transfer vehicle 8 to move simultaneously. Subsequently, after the sliding block 12 resets, the moving rod 29 also slides out of the inclined groove 31 and into the transverse groove 30. Repeating this way, it realizes automatically changing the position of the collection box placed on the transfer vehicle 8 next time, further improving the convenience performance of the device. And when the transfer vehicle 8 is full and moving, the gravity of the transfer vehicle 8 is lost on the top plate 22, and then under the elastic force of the upper spring 26, it pushes the compression block 25 to slide upward and reset, while driving the top plate 22 to slide upward, and making the moving rod 29 slide out of the transverse groove 30. Then it can pull the pull rod 34 to drive the top plate 22 and the sliding frame 24 to slide inside the groove 21 for reset. Subsequently, when the empty transfer vehicle 8 is pushed up, it will squeeze the top plate 22 to slide downward, making the moving rod 29 insert into the transverse groove 30.

[0040] Before pressure welding, when the staff first push the transfer vehicle 8 onto the top plate 22 through the inclined block 39, at this time, due to the self - gravity of the transfer vehicle 8, it presses the top plate 22 and the compression block 25 to slide downward, making the compression block 25 slide into the sliding frame 24, and at the same time compressing the upper spring 26. Subsequently, when the transfer vehicle 8 moves to beside the lower frame 35, the movement of the transfer vehicle 8 makes the upper frame 36 squeeze the limit block 37 to slide downward, while compressing the limit spring 38. Subsequently, when the upper frame 36 moves to the position aligned with the lower frame 35, at this time, the compression on the limit block 37 is released, and then under the elastic force of the limit spring 38, it pushes the limit block 37 to slide upward and insert into the upper frame 36, thereby restricting the position of the transfer vehicle 8 and preventing the transfer vehicle 8 from moving randomly on the top plate 22 during the operation of the moving mechanism, improving the stability during the operation of the device. Finally, before the transfer vehicle 8 full of collection boxes needs to be pushed out, first press the release plate 44 downward with the foot, while driving the limit block 37 to slide downward and out of the upper frame 36, and at the same time compressing the limit spring 38, then it can push the transfer vehicle 8 out of the top plate 22.

[0041] The above has shown and described the basic principles, main features and advantages of the present invention.

[0042] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A cap welding device for lithium battery production, comprising a processing table and a welding mechanism arranged on the processing table, wherein the processing table is provided with a blanking mechanism for blanking the cap after welding, characterized in that: The top of the fixing plate is provided with a fixing plate, and the fixing plate is provided with a fixing plate for storing the collecting box on the fixing plate. The fixing plate has a height higher than that of the top of the fixing plate. A return spring is fixedly connected between the side wall of the limiting plate and the top of the sliding block, and a discharging opening is provided at the bottom of the fixing frame near the baffle. The moving mechanism includes a moving frame, an inward groove is opened on the top of the moving platform, a top plate is arranged on the inner side of the groove, a moving groove is opened through the side wall of the groove, the moving frame is slidably connected to the inner side of the moving groove, and a pair of connecting rods are fixedly connected between the moving frame and the sliding block, the side wall of the moving frame is fixedly connected to the side plate, the top of the side plate is slidably connected to the moving rod, a plurality of transverse grooves are opened equidistantly on the bottom of the top plate, oblique grooves are opened between the plurality of transverse grooves, and both ends of the oblique grooves are connected with the ends away from the adjacent two transverse grooves, a card groove is opened on the inner side of the oblique groove and on the side away from the placement platform, and the top end of the moving rod is inserted into the inner side of one of the transverse grooves, and a limiting mechanism for limiting the position of the transfer vehicle is provided on the top plate.

2. A cap welding device for lithium battery production according to claim 1, characterized in that: A guide rod is fixedly connected between the bottom plates, and the guide rod passes through the inner wall of the sliding block.

3. The cap welding device for lithium battery production according to claim 1, characterized in that: Sliding frames are provided on both sides of the bottom of the top plate, and the sliding frames are laterally slidably connected to the inner side of the groove, compression blocks are fixedly connected on both sides of the bottom of the top plate, and the compression blocks are slidably connected to the inner side of the sliding frame, a pair of upper springs are fixedly connected between the inner side of the sliding frame and the bottom of the compression block, one of the side walls of the sliding frame is fixedly connected to a pull rod, and the pull rod is set through the movable groove.

4. The cap welding device for lithium battery production according to claim 1, characterized in that: The bottom of the moving rod is fixedly connected with a positioning plate, and a lower spring sleeved on the outside of the moving rod is fixedly connected between the top of the positioning plate and the bottom of the side plate. The top of the moving rod is set as a smooth arc surface, and the connection between the card slot and the inclined slot is inclined.

5. The cap welding device for lithium battery production according to claim 1, characterized in that: The limiting mechanism includes a lower frame, which is fixedly connected to the middle position of the top end of the top plate, and an upper frame is fixedly connected to the bottom of the transfer vehicle and at a position corresponding to the lower frame. A limiting block is slidably connected to the inner side of the lower frame, and the limiting block is inserted into the inner side of the upper frame. A plurality of limiting springs are fixedly connected between the bottom end of the lower frame and the limiting block, and the side wall of the limiting block is inclined. A release plate is fixedly connected to the side wall of the limiting block, and the release plate passes through the side wall of the lower frame.

6. The cap welding device for lithium battery production according to claim 1, characterized in that: Inclined blocks are fixedly connected to both sides of the outer wall of the moving platform, and a fence is fixedly connected to the top of the moving platform and the side away from the placing platform, a touch sensor is fixedly connected through the inner side of the horizontal groove away from the side of the placing platform, and the touch sensor is arranged on the side away from the moving rod, the touch sensor is arranged on the side away from the top plate, an alarm is fixedly connected to the outer wall of the moving platform, and the touch sensor is electrically connected to the alarm through a controller.

Images