A battery cap welding device

Abstract

The application provides a battery cover cap welding device, and relates to the technical field of lithium battery production equipment. The battery cover cap welding device comprises a bottom supporting plate, a positioning mechanism and a transfer mechanism. The bottom supporting plate is used for supporting the lithium battery. The positioning mechanism is used for positioning the lithium battery. The transfer mechanism comprises a transfer cylinder and a translation assembly. The translation assembly is used for driving the transfer cylinder to move horizontally above a collection box. The translation assembly is provided with a vertical driving part used for driving the transfer cylinder to move vertically. The transfer cylinder is provided with a valve assembly used for controlling the discharge of the lithium battery. After welding is completed, the bottom supporting plate is driven to move away from below the lithium battery by a sliding driving part, so that the lithium battery falls into the transfer cylinder. Then, the transfer cylinder is driven to move horizontally above the collection box by the translation assembly. Subsequently, the transfer cylinder is driven to move vertically downward to a discharging height by the vertical driving part. The lithium battery in the transfer cylinder is discharged and falls into the collection box by the valve assembly, so that the automatic discharging and boxing of the lithium battery are completed.

Description

Technical Field

[0001] This application relates to the field of lithium battery production equipment technology, and in particular to a battery cap welding device. Background Technology

[0002] Cylindrical lithium batteries are secondary batteries with a cylindrical metal shell as the outer casing. The positive electrode, negative electrode, separator and electrolyte are encapsulated inside through a winding process. They rely on the insertion and extraction of lithium ions between the positive and negative electrodes to achieve charging and discharging. Their core features are "cylindrical structure + wound cell", which is different from the stacking process of square lithium batteries and the aluminum-plastic film shell of soft-pack lithium batteries.

[0003] The production process of cylindrical lithium batteries includes electrode preparation, cell assembly, and formation and capacity testing. In the cell assembly step, a laser welding machine is used to weld the battery cap to the steel casing for sealing. After the cap welding is completed, the battery needs to be transferred to a collection box. Currently, this is usually done manually, which is cumbersome. To solve this problem, utility model patent CN222725863U discloses a lithium battery cap pressure welding device. This device places the lithium battery in a positioning sleeve during the welding process, supports the battery from the bottom using a placement plate, and clamps and positions the battery using a pressure welding guard plate. After welding is complete, the clamping guard plate is released, simultaneously removing the placement plate from the bottom and allowing the battery to fall under its own weight, achieving automatic unloading.

[0004] However, after the lithium battery cap welding device achieves automatic unloading by relying on the weight of the lithium battery to fall, it is still necessary to manually pick up the lithium batteries one by one and put them into the collection box. Therefore, it cannot realize the automatic packing function of lithium batteries, and the labor intensity of the workers is relatively high, which is not conducive to improving the production efficiency of lithium batteries. Utility Model Content

[0005] The purpose of this application is to provide a battery cap welding device to solve the problem that the lithium battery cap pressure welding device in the related technology cannot realize the automatic packaging function of lithium batteries, the labor intensity of workers is high, and it is not conducive to improving the production efficiency of lithium batteries.

[0006] The battery cap welding device provided in this application adopts the following technical solution: A battery cap welding device, comprising: frame; A base plate is provided on the frame and is used to support the lithium battery. The frame is provided with a sliding drive component for driving the base plate to move away from under the lithium battery. A positioning mechanism, which is mounted on the frame and is used to position the lithium battery; A laser welding machine, mounted on a frame, is used to weld the caps of lithium batteries; A collection box, which is placed on the frame; The transfer mechanism includes a transfer cylinder and a translation component. The translation component is mounted on the frame and is used to drive the transfer cylinder to move horizontally above the collection box. The translation component is provided with a vertical drive component for driving the transfer cylinder to move vertically up and down. The transfer cylinder is used to accommodate lithium batteries that have lost the support of the bottom plate. The transfer cylinder is provided with a valve component for controlling the discharge of lithium batteries.

[0007] Optionally, the positioning mechanism includes clamping blocks, a push rod, and a pressing drive component. The clamping blocks are provided in two pieces and are slidably disposed on the frame for clamping and positioning the lithium battery. The pressing drive component is disposed on the frame and is used to drive the push rod to press down on the cap of the lithium battery. The pressing drive component is connected to the two clamping blocks through a linkage component and is used to drive the two clamping blocks to move in opposite directions or back to back.

[0008] Optionally, the frame is provided with a pre-positioning hole for accommodating a lithium battery, the bottom plate is slidably disposed below the pre-positioning hole, and the two clamping blocks are symmetrically disposed above the pre-positioning hole.

[0009] Optionally, the linkage assembly includes an opening and closing gear, a worm gear, and a transmission rod. The opening and closing gear is rotatably mounted on the frame. Each of the two clamping blocks is provided with a rack that meshes with the opening and closing gear. A worm wheel is coaxially mounted on the opening and closing gear. The worm gear is rotatably mounted on the frame and meshes with the worm wheel. A linkage gear is provided on the worm gear. The transmission rod is connected to the pressing drive component, which is used to drive the transmission rod to move vertically. The transmission rod is provided with a toothed rack that can mesh with the linkage gear.

[0010] Optionally, the bottom of the collection box is provided with a buffer pad, the buffer pad is provided with recessed holes for accommodating lithium batteries, and the frame is provided with a positioning part for positioning the collection box.

[0011] Optionally, the translation component includes a support, a longitudinal drive module, and a transverse drive module. The longitudinal drive module is mounted on the frame, the transverse drive module is mounted on the longitudinal slide of the longitudinal drive module, the support is mounted on the transverse slide of the transverse drive module, the transfer cylinder is slidably mounted on the support in a vertical direction, and the vertical drive component is mounted on the support.

[0012] Optionally, the valve assembly includes a valve plate, a telescopic rod, an elastic element, and a connecting rod. The bottom end of the transfer cylinder is provided with a thin-walled tube that can extend into the collection box. The valve plate is slidably inserted into the transfer cylinder. The telescopic rod is slidably mounted vertically on the transfer cylinder and can abut against the support. The two ends of the connecting rod are respectively hinged to the valve plate and the telescopic rod. The elastic element acts on the telescopic rod and provides a spring force to push the telescopic rod downward.

[0013] Optionally, the elastic element is a spring, the transfer cylinder is provided with a convex plate, the telescopic rod slides through the convex plate, the telescopic rod is provided with a flange, the flange is located below the convex plate, the spring is sleeved on the outside of the telescopic rod, the two ends of the spring abut against the convex plate and the flange respectively, and the upper end of the telescopic rod is provided with a limiting block that can abut against the upper surface of the convex plate.

[0014] In summary, this application includes at least the following beneficial technical effects: When welding the lithium battery cap is required, the lithium battery is placed on the base plate and positioned by the positioning mechanism. Then, the cap of the lithium battery is welded by a laser welding machine. After welding, the base plate is moved away from under the lithium battery by the sliding drive component, allowing the lithium battery to fall into the transfer cylinder. Then, the transfer cylinder is moved horizontally above the collection box by the translation component, moving the transfer cylinder to the position where unloading is required. Then, the transfer cylinder is moved vertically downward to the unloading height by the vertical drive component, and the lithium battery in the transfer cylinder is discharged into the collection box by the valve component, completing the automatic unloading and boxing of lithium batteries. This can effectively reduce the labor intensity of workers and improve the production efficiency of lithium batteries. Attached Figure Description

[0015] Figure 1 This is a first-view structural schematic diagram of the battery cap welding device in an embodiment of this application; Figure 2 for Figure 1 A magnified view of part A in the middle; Figure 3 This is a cross-sectional view from a second perspective of the battery cap welding device in an embodiment of this application; Figure 4 for Figure 3 A magnified view of part B in the middle section; Figure 5 This is a cross-sectional view from a third perspective of the battery cap welding device in an embodiment of this application; Figure 6 for Figure 5 A magnified view of part C in the diagram.

[0016] Explanation of reference numerals in the attached figures: 10. Frame; 11. Worktable; 111. Guide rail; 112. Pre-positioning hole; 113. Guide plate; 12. Base plate; 121. L-shaped boss; 20. Positioning mechanism; 21. Clamping block; 211. Rack; 212. Arc groove; 22. Push rod; 221. Strip plate; 23. Downward drive cylinder; 231. Second piston rod; 232. Connecting block; 24. Opening and closing gear; 25. Worm gear; 26. Transmission rod; 261. Gear rack; 27. Worm wheel; 28. Linkage gear; 30. Transfer cylinder; 31. Thin-walled tube; 32. Guide shell; 33. Convex plate; 40. Translation component; 41. Support; 411. Guide sleeve; 42. Longitudinal drive module; 421. Longitudinal slide; 43. Transverse drive module; 431. Lateral slide; 50. Valve assembly; 52. Valve plate; 53. Telescopic rod; 531. Flange; 532. Limiting block; 54. Spring; 55. Connecting rod; 551. Hinge shaft; 60. Base plate; 70. Sliding drive cylinder; 71. First piston rod; 80. Laser welding machine; 90. Collection box; 91. Buffer pad; 92. Concave hole; 100. Lithium battery; 101. Cap; 130. Vertical drive cylinder; 131. Third piston rod. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail below.

[0018] This application discloses a battery cap welding device.

[0019] A battery cap welding device includes a frame 10, a base plate 60, a positioning mechanism 20, a laser welding machine 80, a collection box 90, and a transfer mechanism.

[0020] Reference Figures 1 to 4 The frame 10 is equipped with a worktable 11 and a base plate 12. A laser welding machine 80 is mounted on the worktable 11 of the frame 10 and is used to weld the cap 101 of the lithium battery 100. The worktable 11 of the frame 10 is provided with a pre-positioning hole 112 for accommodating the lithium battery 100. The diameter of the pre-positioning hole 112 is slightly larger than the outer diameter of the lithium battery 100. The base plate 60 is slidably mounted on the worktable 11 of the frame 10 and is located below the pre-positioning hole 112. The worktable 11 is provided with a guide plate 113 for guiding the base plate 60. The base plate 60 is used to support the lithium battery 100.

[0021] The positioning mechanism 20 is mounted on the frame 10 and is used to position the lithium battery 100. In an optional embodiment, the specific structure of the positioning mechanism 20 is as follows: The positioning mechanism 20 includes a clamping block 21, a push rod 22 and a pressing drive component. There are two clamping blocks 21. The worktable 11 is provided with a guide rail 111. The two clamping blocks 21 are slidably mounted on the guide rail 111 of the frame 10. The two clamping blocks 21 are symmetrically arranged above the pre-positioning hole 112. The clamping blocks 21 are provided with an arc-shaped groove 212 that fits with the lithium battery 100. The two clamping blocks 21 are used to clamp and position the lithium battery 100.

[0022] The downward driving component is mounted on the worktable 11 of the frame 10 and is used to drive the push rod 22 to press down on the cap 101 of the lithium battery 100. More specifically, the downward driving component can be a downward driving cylinder 23, which is fixed on the worktable 11 of the frame 10. The second piston rod 231 of the downward driving cylinder 23 is provided with a connecting block 232, and the push rod 22 is fixed on the connecting block 232 through the strip plate 221.

[0023] The pressing drive is connected to two clamping blocks 21 via a linkage assembly and is used to drive the two clamping blocks 21 to move in opposite directions or back to back. More specifically, the linkage assembly includes a splitting gear 24, a worm gear 25, and a transmission rod 26. The splitting gear 24 is rotatably mounted on the worktable 11 of the frame 10. There are two sets of splitting gears 24, which are located on both sides of the clamping blocks 21 respectively. Each of the two clamping blocks 21 is provided with a rack 211 that meshes with the splitting gear 24. A worm wheel 27 is coaxially mounted on the splitting gear 24 on one side. The worm gear 25 is rotatably mounted on the frame 10 and meshes with the worm wheel 27. A linkage gear 28 is provided on the worm gear 25. The transmission rod 26 is fixedly connected to the connecting block 232 of the pressing drive. The pressing drive is used to drive the transmission rod 26 to move vertically. The transmission rod 26 is provided with a toothed rack 261 that can mesh with the linkage gear 28.

[0024] When welding is required on the cap 101, the lithium battery 100 is placed in the pre-positioning hole 112 and supported by the base plate 60. Then, the connecting block 232, the push rod 22 and the transmission rod 26 are driven to move downward by the downward drive cylinder 23. During the downward movement, the gear row 261 drives the linkage gear 28 and the worm gear 25 to rotate. Then, the worm gear 25 drives the worm wheel 27 and the opening and closing gear 24 to rotate. Then, the opening and closing gear 24 and the rack 211 drive the two clamping blocks 21 to move in opposite directions to clamp and position the lithium battery 100. When the two clamping blocks 21 are completely closed, the gear row 261 is just separated from the linkage gear 28, and the push rod 22 has not yet contacted the cap 101. Next, the downward-pressing drive cylinder 23 continues to drive the connecting block 232, the push rod 22, and the transmission rod 26 to move downwards. At this time, the gear rack 261 has separated from the linkage gear 28, the linkage gear 28 does not rotate, and the clamping block 21 remains stationary. When the push rod 22 contacts the upper surface of the cap 101 and presses the cap 101 tightly, the downward movement of the push rod 22 stops. Then, the cap 101 is welded to the steel shell of the lithium battery 100 by the laser welding machine 80, sealing the cap 101 with the steel shell of the lithium battery 100.

[0025] Reference Figures 3 to 6 The frame 10 is provided with a sliding drive for driving the base plate 60 to move away from under the lithium battery 100. More specifically, the sliding drive can be a sliding drive cylinder 70, which is fixed on the worktable 11. The first piston rod 71 of the sliding drive cylinder 70 is fixedly connected to the base plate 60.

[0026] The collection box 90 is placed on the base plate 12 of the frame 10. The base plate 12 of the frame 10 is provided with a positioning part for positioning the collection box 90. The positioning part is an L-shaped boss 121, and there are four sets of L-shaped bosses 121, which are located at the four corners of the collection box 90. The inner bottom of the collection box 90 is provided with a buffer pad 91, and the buffer pad 91 is provided with a recess 92 for accommodating the lithium battery 100.

[0027] The transfer mechanism includes a transfer cylinder 30 and a translation component 40. The translation component 40 is mounted on the frame 10 and is used to drive the transfer cylinder 30 to move horizontally above the collection box 90. More specifically, the translation component 40 includes a support 41, a longitudinal drive module 42, and a transverse drive module 43. The longitudinal drive module 42 is mounted on the base plate 12 of the frame 10, and the transverse drive module 43 is mounted on the longitudinal slide 421 of the longitudinal drive module 42. The support 41 is mounted on the transverse slide 431 of the transverse drive module 43. Both the longitudinal drive module 42 and the transverse drive module 43 can be linear screw drive modules.

[0028] The transfer cylinder 30 is used to accommodate the lithium battery 100 that has lost the support of the base plate 60. The transfer cylinder 30 is slidably mounted on the support 41, and the support 41 is provided with a guide sleeve 411 for guiding the transfer cylinder 30 vertically. The translation assembly 40 is provided with a vertical drive component for driving the transfer cylinder 30 to move up and down vertically. More specifically, the vertical drive component can be a vertical drive cylinder 130, which is fixed on the support 41, and the third piston rod 131 of the vertical drive cylinder 130 is connected to the transfer cylinder 30.

[0029] The transfer cylinder 30 is provided with a valve assembly 50 for controlling the discharge of the lithium battery 100. In an optional embodiment, the specific structure of the valve assembly 50 is as follows: the valve assembly 50 includes a valve plate 52, a telescopic rod 53, an elastic element and a connecting rod 55. The bottom end of the transfer cylinder 30 is provided with a thin-walled tube 31 that can extend into the collection box 90. The valve plate 52 is slidably inserted into the transfer cylinder 30. The transfer cylinder 30 is provided with a guide shell 32 for slidingly guiding the valve plate 52. The telescopic rod 53 is slidably disposed on the transfer cylinder 30 along the vertical direction and can abut against the support 41. The two ends of the connecting rod 55 are respectively hinged to the valve plate 52 and the telescopic rod 53 through a hinge shaft 551.

[0030] An elastic element acts on the telescopic rod 53 and provides a spring force to push the telescopic rod 53 downward. More specifically, the elastic element is a spring 54. The transfer cylinder 30 is provided with a protruding plate 33. The telescopic rod 53 slides through the protruding plate 33. The telescopic rod 53 is provided with a flange 531, which is located below the protruding plate 33. The spring 54 is sleeved on the outside of the telescopic rod 53. The two ends of the spring 54 abut against the protruding plate 33 and the flange 531, respectively. The upper end of the telescopic rod 53 is provided with a limiting block 532 that can abut against the upper surface of the protruding plate 33.

[0031] The implementation principle of the battery cap welding device in this embodiment is as follows: When it is necessary to weld the cap 101, the lithium battery 100 is placed in the prepositioning hole 112 and supported by the bottom support plate 60. Then, the lithium battery 100 is clamped and positioned by the two clamping blocks 21 of the positioning mechanism 20. The cap 101 is pressed by the top rod 22. Then, the cap 101 is welded by the laser welding machine 80 to weld and seal the cap 101 to the steel shell of the lithium battery 100.

[0032] Next, the downward drive cylinder 23 drives the transmission rod 26 and the top rod 22 to move upward, causing the top rod 22 to separate from the cap 101. At the same time, the linkage assembly drives the two clamping blocks 21 to separate. Then, the sliding drive cylinder 70 drives the bottom support plate 60 to move away from under the lithium battery 100, allowing the lithium battery 100 to fall into the transfer cylinder 30, where it is supported by the valve plate 52. Next, the vertical drive cylinder 130 drives the transfer cylinder 30 to move downward a certain distance, allowing the transfer cylinder 30 to move horizontally. Then, the longitudinal drive module 42 and the transverse drive module 43 drive the support 41 to move, moving the transfer cylinder 30 until the thin-walled tube 31 is aligned with the recess 92 where the lithium battery 100 needs to be placed. Then, the vertical drive cylinder 130 drives the transfer cylinder 30 to move downward, so that the bottom end of the thin-walled tube 31 contacts the upper surface of the buffer pad 91. During the descent of the transfer cylinder 30, the telescopic rod 53 abuts against the support 41 and compresses the spring 54, causing the telescopic rod 53 to move upward relative to the transfer cylinder 30. Then, the connecting rod 55 drives the valve plate 52 to slide along the guide shell 32, causing the valve plate 52 to move away from below the lithium battery 100. Then, the lithium battery 100 falls into the concave hole 92 along the transfer cylinder 30 and the thin-walled tube 31, completing one unloading and packing of the lithium battery 100.

[0033] Next, the sliding drive cylinder 70 drives the bottom support plate 60 to move below the pre-positioning hole 112, and the vertical drive cylinder 130 drives the transfer cylinder 30 to move upward and reset. Then, the longitudinal drive module 42 and the transverse drive module 43 drive the transfer cylinder 30 to move to a position aligned with the pre-positioning hole 112. Next, the vertical drive cylinder 130 drives the transfer cylinder 30 to move upward until it contacts the bottom surface of the bottom support plate 60. Then, the above clamping, positioning, welding and unloading and packing steps are repeated until the concave hole 92 in the collection box 90 is filled. After filling, the collection box 90 can be manually removed from the bottom plate 12 and transferred to the next process.

[0034] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A battery cap welding device, characterized in that, include: Rack (10); A base plate (60) is provided on the frame (10) and is used to support the lithium battery (100). The frame (10) is provided with a sliding drive for driving the base plate (60) to move away from under the lithium battery (100). A positioning mechanism (20) is provided on the frame (10) and is used to position the lithium battery (100); A laser welding machine (80) is mounted on a frame (10) and is used to weld the cap (101) of a lithium battery (100); A collection box (90) is placed on the frame (10); The transfer mechanism includes a transfer cylinder (30) and a translation component (40). The translation component (40) is mounted on the frame (10) and is used to drive the transfer cylinder (30) to move horizontally above the collection box (90). The translation component (40) is provided with a vertical drive member for driving the transfer cylinder (30) to move vertically up and down. The transfer cylinder (30) is used to hold the lithium battery (100) that has lost the support of the bottom plate (60). The transfer cylinder (30) is provided with a valve component (50) for controlling the discharge of the lithium battery (100).

2. The battery cap welding device according to claim 1, characterized in that, The positioning mechanism (20) includes clamping blocks (21), a push rod (22) and a pressing drive. There are two clamping blocks (21), which are slidably mounted on the frame (10) and used to clamp and position the lithium battery (100). The pressing drive is mounted on the frame (10) and is used to drive the push rod (22) to press down on the cap (101) of the lithium battery (100). The pressing drive is connected to the two clamping blocks (21) through a linkage component and is used to drive the two clamping blocks (21) to move in opposite directions or in opposite directions.

3. The battery cap welding device according to claim 2, characterized in that, The frame (10) is provided with a pre-positioning hole (112) for accommodating a lithium battery (100), the bottom plate (60) is slidably disposed below the pre-positioning hole (112), and the two clamping blocks (21) are symmetrically disposed above the pre-positioning hole (112).

4. The battery cap welding device according to claim 2, characterized in that, The linkage assembly includes an opening and closing gear (24), a worm (25), and a transmission rod (26). The opening and closing gear (24) is rotatably mounted on the frame (10). Two clamping blocks (21) are respectively provided with racks (211) that mesh with the opening and closing gear (24). A worm wheel (27) is coaxially mounted on the opening and closing gear (24). The worm (25) is rotatably mounted on the frame (10) and meshes with the worm wheel (27). A linkage gear (28) is provided on the worm (25). The transmission rod (26) is connected to the pressing drive component. The pressing drive component is used to drive the transmission rod (26) to move vertically. A toothed rack (261) that can mesh with the linkage gear (28) is provided on the transmission rod (26).

5. The battery cap welding device according to claim 1, characterized in that, The bottom of the collection box (90) is provided with a buffer pad (91), and the buffer pad (91) is provided with a recess (92) for accommodating the lithium battery (100). The frame (10) is provided with a positioning part for positioning the collection box (90).

6. The battery cap welding device according to claim 1, characterized in that, The translation component (40) includes a support (41), a longitudinal drive module (42), and a transverse drive module (43). The longitudinal drive module (42) is mounted on the frame (10). The transverse drive module (43) is mounted on the longitudinal slide (421) of the longitudinal drive module (42). The support (41) is mounted on the transverse slide (431) of the transverse drive module (43). The transfer cylinder (30) is slidably mounted on the support (41) in the vertical direction. The vertical drive component is mounted on the support (41).

7. A battery cap welding device according to claim 6, characterized in that, The valve assembly (50) includes a valve plate (52), a telescopic rod (53), an elastic element, and a connecting rod (55). The bottom end of the transfer cylinder (30) is provided with a thin-walled tube (31) that can extend into the collection box (90). The valve plate (52) is slidably inserted into the transfer cylinder (30). The telescopic rod (53) is slidably mounted on the transfer cylinder (30) in a vertical direction and can abut against the support (41). The two ends of the connecting rod (55) are respectively hinged to the valve plate (52) and the telescopic rod (53). The elastic element acts on the telescopic rod (53) and is used to provide elastic force to push the telescopic rod (53) downward.

8. The battery cap welding device according to claim 7, characterized in that, The elastic element is a spring (54), the transfer cylinder (30) is provided with a protruding plate (33), the telescopic rod (53) slides through the protruding plate (33), the telescopic rod (53) is provided with a flange (531), the flange (531) is located below the protruding plate (33), the spring (54) is sleeved on the outside of the telescopic rod (53), the two ends of the spring (54) abut against the protruding plate (33) and the flange (531) respectively, and the upper end of the telescopic rod (53) is provided with a limiting block (532) that can abut against the upper surface of the protruding plate (33).

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