Spot welding device for processing lithium battery pack

Abstract

The utility model discloses a lithium battery pack processing spot welding device which comprises a working plate, two sets of side positioning mechanisms are arranged at the top of the working plate, an end positioning block is fixedly installed at the top of the working plate and located on one side of each side positioning mechanism, and a transfer mechanism is fixedly installed at the top of the working plate. And a spot welding mechanism is fixedly mounted on one side of the transferring mechanism, and a welding head grinding mechanism for preventing an oxide layer on the spot welding mechanism from being accumulated is fixedly mounted at the top of the working plate. The side positioning mechanism and the end part positioning block are matched with each other to fix and limit different sizes of battery pack boxes needing spot welding, and then the transferring mechanism and the spot welding mechanism are matched with each other to carry out spot welding treatment on lithium battery packs in the lithium battery boxes; and after spot welding is conducted for a long time, the spot welding mechanism can be moved to the position above the welding head grinding mechanism, then the welding head grinding mechanism can do reciprocating motion, and impurities and oxide layers existing on the spot welding mechanism are ground and removed.

Description

A spot welding device for lithium battery pack processing Technical Field

[0001] This utility model relates to the field of lithium battery processing technology, specifically to a spot welding device for lithium battery pack processing. Background Technology

[0002] A lithium battery pack is a power system composed of multiple lithium battery cells connected in series or parallel. It is widely used in portable electronic devices, electric vehicles, energy storage systems and other fields.

[0003] In the processing of lithium battery packs, spot welding equipment is needed to connect multiple lithium battery cells into a battery pack. However, existing spot welding equipment places the battery pack inside a spot welding box and then uses a spot welding head to perform spot welding. During long-term spot welding, some oxide layer and impurities will remain on the surface of the welding head. If these impurities and oxide layer are not removed for a long time, they will easily affect the spot welding effect. Therefore, we propose a spot welding device for lithium battery pack processing. Summary of the Invention

[0004] The purpose of this invention is to provide a spot welding device for lithium battery pack processing to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a spot welding device for lithium battery pack processing, comprising a work plate, a support frame fixedly installed at the bottom of the work plate, two sets of side positioning mechanisms for positioning battery packs of different specifications provided at the top of the work plate, an end positioning block fixedly installed at the top of the work plate and on one side of the side positioning mechanism, a transfer mechanism fixedly installed at the top of the work plate, a spot welding mechanism for welding battery packs that moves along the "Z" axis fixedly installed on one side of the transfer mechanism, and a welding head grinding mechanism fixedly installed at the top of the work plate to prevent oxide layer accumulation on the spot welding mechanism.

[0006] Furthermore, the transfer mechanism includes an electric slide rail, an electric slider, a gantry frame, and a linear motor. Two sets of electric slide rails are fixedly installed on the top of the work plate. A gantry frame is slidably connected to the electric slide rails via an electric slider. A linear motor is fixedly installed on one side of the gantry frame.

[0007] Furthermore, the spot welding mechanism includes a fixed plate, a first slide rail, a first slider, a movable plate, and a first threaded rod. Two sets of first slide rails are fixedly installed on one side of the fixed plate. The movable plate is slidably connected to the first slide rail via the first slider. A spot welding head is fixedly installed on one side of the movable plate. The first threaded rod is rotatably connected to the fixed plate. A first drive motor is fixedly installed on the top of the fixed plate. The output end of the first drive motor is fixedly connected to the first threaded rod. A threaded sleeve is threadedly connected to the external thread of the first threaded rod. One side of the threaded sleeve is fixedly connected to the movable plate.

[0008] Furthermore, the side positioning mechanism includes a second threaded rod, a positioning plate, a locking nut, a drive cylinder, and a drive plate. Two sets of second threaded rods are fixedly installed on the top of the working plate. An adjustment groove is opened on the positioning plate at the position corresponding to the second threaded rod. The external thread of the second threaded rod is connected to a locking nut that fits against the top of the positioning plate. A drive cylinder is fixedly installed on the top of the positioning plate, and the output end of the drive cylinder is fixedly connected to the drive plate.

[0009] Furthermore, the welding head grinding mechanism includes a second slide rail, a second slider, a grinding block, a first fixed rod, a second drive motor, and a turntable. The second slide rail is fixedly installed on the top of the work plate. The grinding block is slidably connected to the second slide rail via the second slider. The first fixed rod is fixedly installed on one side of the second slider. The second drive motor is fixedly installed on the top of the work plate. The output end of the second drive motor is fixedly connected to the turntable. The second fixed rod is fixedly connected to one edge of the turntable. A sleeve rod is sleeved around the first fixed rod and the second fixed rod.

[0010] Furthermore, rubber pads are fixedly installed on one side of both the end positioning block and the drive plate.

[0011] Compared with the prior art, the present invention has the following advantages: The side positioning mechanism and the end positioning block of the present invention cooperate with each other to fix and limit the battery pack boxes of different sizes that need to be spot welded. The transfer mechanism and the spot welding mechanism cooperate with each other to perform three-axis movement, thereby enabling spot welding of the lithium battery pack inside the lithium battery box. After the spot welding has been performed for a long time, the spot welding mechanism can be moved above the welding head grinding mechanism. Then the welding head grinding mechanism can reciprocate to quickly grind away the impurities and oxide layer present on the spot welding mechanism. Attached Figure Description

[0012] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0013] Figure 2 is a three-dimensional structural schematic diagram of the spot welding mechanism of this utility model;

[0014] Figure 3 is a three-dimensional structural diagram of the welding head grinding mechanism of this utility model.

[0015] In the diagram: 1. Working plate; 2. Support frame; 3. Side positioning mechanism; 4. Transfer mechanism; 5. Spot welding mechanism; 6. End positioning block; 7. Welding head grinding mechanism; 8. Electric slide rail; 9. Electric slider; 10. Gantry frame; 11. Linear motor; 12. Fixed plate; 13. First slide rail; 14. First slider; 15. Moving plate; 16. First threaded rod; 17. First drive motor; 18. Threaded sleeve; 19. Spot welding head; 20. Second threaded rod; 21. Positioning plate; 22. Adjustment groove; 23. Locking nut; 24. Drive cylinder; 25. Drive plate; 26. Second slide rail; 27. Second slider; 28. Grinding block; 29. ​​First fixed rod; 30. Second drive motor; 31. Turntable; 32. Second fixed rod; 33. Sleeve rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please refer to Figures 1-3. This utility model provides a technical solution: a spot welding device for processing lithium battery packs, including a working plate 1. A support frame 2 is fixedly installed at the bottom of the working plate 1. Two sets of side positioning mechanisms 3 for positioning battery packs of different specifications are provided at the top of the working plate 1. An end positioning block 6 is fixedly installed at the top of the working plate 1 and on one side of the side positioning mechanism 3. A transfer mechanism 4 is fixedly installed at the top of the working plate 1. A spot welding mechanism 5 for welding battery packs that moves along the "Z" axis is fixedly installed on one side of the transfer mechanism 4. A welding head grinding mechanism 7 for preventing oxide layer accumulation on the spot welding mechanism 5 is fixedly installed at the top of the working plate 1.

[0018] The side positioning mechanism 3 and the end positioning block 6 work together to fix and limit the battery pack boxes of different sizes that need to be spot welded. The transfer mechanism 4 and the spot welding mechanism 5 work together to perform three-axis movement, so that the lithium battery pack inside the lithium battery box can be spot welded. After the spot welding has been going on for a long time, the spot welding mechanism 5 can be moved above the welding head grinding mechanism 7. Then the welding head grinding mechanism 7 can reciprocate to quickly grind away the impurities and oxide layer on the spot welding mechanism 5.

[0019] Please refer to Figure 1. The side positioning mechanism 3 includes a second threaded rod 20, a positioning plate 21, a locking nut 23, a drive cylinder 24, and a drive plate 25. Two sets of second threaded rods 20 are fixedly installed on the top of the working plate 1. An adjustment groove 22 is provided on the positioning plate 21 at the position corresponding to the second threaded rod 20. The external thread of the second threaded rod 20 is connected to a locking nut 23 that fits against the top of the positioning plate 21. The drive cylinder 24 is fixedly installed on the top of the positioning plate 21. The output end of the drive cylinder 24 is fixedly connected to the drive plate 25. Rubber pads are fixedly installed on one side of the end positioning block 6 and the drive plate 25.

[0020] When it is necessary to fix the lithium battery pack, the position of the positioning plate 21 is adjusted according to the size of the lithium battery pack. When adjusting the position of the positioning plate 21, the locking nut 23 is unscrewed so that the adjustment groove 22 on the positioning plate 21 moves along the second threaded rod 20. After the movement is completed, the locking nut 23 is used to position the positioning plate 21. Then, one end of the lithium battery pack is brought into contact with the end positioning block 6. Then, the drive cylinder 24 is operated, and the drive cylinder 24 drives the drive plate 25 to move. In this way, the drive plate 25 can be used to fix the lithium battery pack.

[0021] Please refer to Figures 1, 2, and 3. The transfer mechanism 4 includes an electric slide rail 8, an electric slider 9, a gantry frame 10, and a linear motor 11. Two sets of electric slide rails 8 are fixedly installed on the top of the work plate 1. The gantry frame 10 is slidably connected to the electric slide rails 8 via electric sliders 9. A linear motor 11 is fixedly installed on one side of the gantry frame 10. The spot welding mechanism 5 includes a fixed plate 12, a first slide rail 13, a first slider 14, a moving plate 15, and a first threaded rod 16. Two linear motors 11 are fixedly installed on one side of the fixed plate 12. A first slide rail 13 is assembled, and a movable plate 15 is slidably connected to the first slide rail 13 via a first slider 14. A spot welding head 19 is fixedly installed on one side of the movable plate 15. A first threaded rod 16 is rotatably connected to the fixed plate 12. A first drive motor 17 is fixedly installed on the top of the fixed plate 12. The output end of the first drive motor 17 is fixedly connected to the first threaded rod 16. A threaded sleeve 18 is threadedly connected to the outside of the first threaded rod 16. One side of the threaded sleeve 18 is fixedly connected to the movable plate 15.

[0022] The electric slide rail 8, electric slider 9, and linear motor 11 work together to drive the spot welding mechanism 5 to move along the "X" and "Y" axes to the position where spot welding is required. Then, the first drive motor 17 drives the first threaded rod 16 to rotate. The rotating first threaded rod 16 can then push the threaded sleeve 18 and the moving plate 15, which are limited by the first slide rail 13 and the first slider 14, to move along the "Z" axis, so that the spot welding head 19 can be used to complete the spot welding step.

[0023] Please refer to Figures 1 and 3. The welding head grinding mechanism 7 includes a second slide rail 26, a second slider 27, a grinding block 28, a first fixing rod 29, a second drive motor 30, and a turntable 31. The second slide rail 26 is fixedly installed on the top of the working plate 1. The grinding block 28 is slidably connected to the second slide rail 26 via the second slider 27. The first fixing rod 29 is fixedly installed on one side of the second slider 27. The second drive motor 30 is fixedly installed on the top of the working plate 1. The output end of the second drive motor 30 is fixedly connected to the turntable 31. The second fixing rod 32 is fixedly connected to one edge of the turntable 31. A sleeve rod 33 is sleeved on the outside of the first fixing rod 29 and the second fixing rod 32.

[0024] When the spot welding head 19 moves above the grinding block 28, the second drive motor 30 drives the turntable 31 to rotate. The rotating turntable 31 then drives the second fixed rod 32 to rotate. In this way, the sleeve rod 33 can push the first fixed rod 29, the grinding block 28 and the second slider 27 to reciprocate along the second slide rail 26. Thus, the grinding block 28 can be used to grind and remove the impurities and oxide layer remaining on the surface of the spot welding head 19.

[0025] In use, firstly, the side positioning mechanism 3 and the end positioning block 6 cooperate to fix and limit the battery pack boxes of different sizes that need to be spot welded. Then, the transfer mechanism 4 and the spot welding mechanism 5 cooperate to perform three-axis movement, thereby enabling spot welding of the lithium battery pack inside the lithium battery box. After spot welding has been performed for a long time, the spot welding mechanism 5 can be moved above the welding head grinding mechanism 7. Then, the welding head grinding mechanism 7 can reciprocate to quickly grind away impurities and oxide layers on the spot welding mechanism 5. When it is necessary to fix the lithium battery box, the position of the positioning plate 21 is adjusted according to the size of the lithium battery box. When adjusting the position of the positioning plate 21, the locking nut 23 is unscrewed, so that the adjustment groove 22 on the positioning plate 21 moves along the second threaded rod 20. After the movement is completed, the locking nut 23 is used to position the positioning plate 21. Then, one end of the lithium battery box is brought into contact with the end positioning block 6, and then the drive cylinder 24 is operated. 4. The drive plate 25 is moved, which can be used to fix the lithium battery pack box. The electric slide rail 8, electric slider 9 and linear motor 11 work together to drive the spot welding mechanism 5 to move along the "X" axis and "Y" axis to the position where spot welding is required. Then the first drive motor 17 drives the first threaded rod 16 to rotate. The rotating first threaded rod 16 can push the threaded sleeve 18 and the moving plate 15, which are limited by the first slide rail 13 and the first slider 14, to move along the "Z" axis. The spot welding head 19 can then be used to complete the spot welding step. After the spot welding head 19 moves above the grinding block 28, the second drive motor 30 drives the turntable 31 to rotate. The rotating turntable 31 can then drive the second fixed rod 32 to rotate. The sleeve rod 33 can then push the first fixed rod 29, the grinding block 28 and the second slider 27 to reciprocate along the second slide rail 26. The grinding block 28 can then be used to grind and remove the impurities and oxide layer remaining on the surface of the spot welding head 19.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spot welding device for processing lithium battery packs, comprising a work plate (1), wherein a support frame (2) is fixedly mounted on the bottom of the work plate (1), characterized in that: The top of the work plate (1) is provided with two sets of side positioning mechanisms (3) for positioning battery packs of different specifications. An end positioning block (6) is fixedly installed on the top of the work plate (1) and on one side of the side positioning mechanism (3). A transfer mechanism (4) is fixedly installed on the top of the work plate (1). A spot welding mechanism (5) for welding battery packs that moves along the "Z" axis is fixedly installed on one side of the transfer mechanism (4). A welding head grinding mechanism (7) for preventing oxide layer accumulation on the spot welding mechanism (5) is fixedly installed on the top of the work plate (1).

2. The spot welding device for processing lithium battery packs according to claim 1, characterized in that: The transfer mechanism (4) includes an electric slide rail (8), an electric slider (9), a gantry (10) and a linear motor (11). Two sets of electric slide rails (8) are fixedly installed on the top of the work plate (1). The gantry (10) is slidably connected to the electric slide rail (8) through the electric slider (9). A linear motor (11) is fixedly installed on one side of the gantry (10).

3. The spot welding device for processing lithium battery packs according to claim 2, characterized in that: The spot welding mechanism (5) includes a fixed plate (12), a first slide rail (13), a first slider (14), a moving plate (15), and a first threaded rod (16). Two sets of first slide rails (13) are fixedly installed on one side of the fixed plate (12). The moving plate (15) is slidably connected to the first slide rail (13) via the first slider (14). A spot welding head (19) is fixedly installed on one side of the moving plate (15). The first threaded rod (16) is rotatably connected to the fixed plate (12). A first drive motor (17) is fixedly installed on the top of the fixed plate (12). The output end of the first drive motor (17) is fixedly connected to the first threaded rod (16). A threaded sleeve (18) is threadedly connected to the outside of the first threaded rod (16). One side of the threaded sleeve (18) is fixedly connected to the moving plate (15).

4. The spot welding device for processing of lithium batteries according to claim 3, characterized in that: The side positioning mechanism (3) includes a second threaded rod (20), a positioning plate (21), a locking nut (23), a driving cylinder (24), and a driving plate (25). Two sets of second threaded rods (20) are fixedly installed on the top of the working plate (1). An adjustment groove (22) is provided on the positioning plate (21) at the position corresponding to the second threaded rod (20). The external thread of the second threaded rod (20) is connected to a locking nut (23) that fits against the top of the positioning plate (21). The top of the positioning plate (21) is fixedly installed with a driving cylinder (24). The output end of the driving cylinder (24) is fixedly connected to the driving plate (25).

5. The spot welding apparatus for processing of lithium batteries according to claim 4, characterized in that: The welding head grinding mechanism (7) includes a second slide rail (26), a second slider (27), a grinding block (28), a first fixed rod (29), a second drive motor (30), and a turntable (31). The second slide rail (26) is fixedly installed on the top of the working plate (1). The grinding block (28) is slidably connected to the second slide rail (26) via the second slider (27). The first fixed rod (29) is fixedly installed on one side of the second slider (27). The second drive motor (30) is fixedly installed on the top of the working plate (1). The turntable (31) is fixedly connected to the output end of the second drive motor (30). The second fixed rod (32) is fixedly connected to one side edge of the turntable (31). A sleeve rod (33) is sleeved on the outside of the first fixed rod (29) and the second fixed rod (32).

6. The spot welding device for processing lithium battery packs according to claim 5, characterized in that: Rubber pads are fixedly installed on one side of both the end positioning block (6) and the drive plate (25).

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