Spot welding machine for lithium battery processing
By introducing structures such as electric slide rails, cylinders and clamping components into the spot welding machine for lithium battery processing, the precise positioning and fixing of the electrode ears and battery components is achieved, the problem of insufficient welding accuracy in the prior art is solved, and the welding quality and production efficiency are improved.
Patent Information
- Application Number
- CN202422442949.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-10-10
AI Technical Summary
When welding the existing spot welding machines for lithium battery processing, the parameters such as current, pressure and time are not controlled accurately enough, resulting in unstable quality of the welding joints, making it difficult to ensure welding accuracy, inaccurate positioning of the extreme ears or insufficient clamping force, which increases the scrap rate and reduces production efficiency.
A spot welder including a workbench, mounting frame, cylinder, clamping assembly and welding assembly was designed. Through the cooperation of electric slide rails and cylinders, precise positioning and fixing of the electrode ears and battery components is achieved. The structures such as clamping assembly, L-shaped rods and elastic parts are used to ensure that the electrode ears and battery components remain tightly attached during the welding process, and the welding accuracy is improved by combining sensors and transmitters.
It improves the welding accuracy of lithium battery processing, reduces the scrap rate, improves production efficiency and overall performance and safety of the battery.
Smart Images
Figure CN223301111U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of spot welding machines, in particular to a spot welding machine for processing lithium batteries. Background Art
[0002] Spot welders for lithium battery processing are specialized welding equipment used in the lithium battery manufacturing process, primarily for welding battery cells and conductive connectors together to form battery packs. Welding is achieved by instantaneously applying a high-voltage current, generating high-temperature molten metal at the contact surfaces. Spot welders can be categorized as either manual or automatic, depending on the degree of automation. Manual spot welders are suitable for small-batch production or repairs, while automatic spot welders are suitable for large-scale production and can significantly improve production efficiency.
[0003] Existing spot welding machines for battery processing have some significant shortcomings in actual production. First, due to inaccurate control of parameters such as current, pressure, and time during welding, the quality of the welds is unstable and spot welding accuracy is difficult to ensure, thus affecting the overall performance and safety of the battery. Second, before spot welding the battery and tab together, inaccurate tab positioning or insufficient clamping force can cause the tab to detach from the battery during handling or preparation for welding, not only increasing the scrap rate in the production process but also reducing overall production efficiency. Utility Model Content
[0004] In order to overcome the shortcoming that the existing spot welding machine has insufficient precision and thus the tabs cannot be correctly welded to the battery, the purpose of the utility model is to provide a spot welding machine for lithium battery processing with high spot welding precision.
[0005] A spot welding machine for lithium battery processing includes a workbench, a first mounting frame and an electric slide rail; the first mounting frame is fixedly connected to the top of the workbench, and the electric slide rail is installed inside the first mounting frame; it is characterized in that it also includes a second mounting frame, a first cylinder, a second cylinder, a mounting block, a clamping assembly and a welding assembly; the slider provided on the electric slide rail is fixedly connected to the second mounting frame, the top of the second mounting frame is fixedly connected to the first cylinder, and the piston rod of the first cylinder passes downward through the second mounting frame; the end of the piston rod of the first cylinder is connected to the second cylinder, the piston rod of the second cylinder extends forward and the end is connected to the mounting block, the welding assembly is installed on the front side of the mounting block, and the clamping assembly is connected to the welding assembly.
[0006] The beneficial effects are as follows: the utility model provides a clamping assembly, which can squeeze and fix the pole ear and the battery assembly when welding the battery assembly, thereby improving the welding accuracy of the utility model, and is also provided with an L-shaped rod, a second elastic member and a pressure rod, which can fix the pole ear and the battery assembly throughout the welding process, further improving the welding accuracy, and is also provided with a guide plate, a fixing plate and a clamping plate, etc., which can enable battery assemblies of different specifications to be fixed under the welding assembly during welding. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.
[0008] Figure 2 This is a schematic structural diagram of the first cylinder, the second cylinder, and the mounting block of the present invention.
[0009] Figure 3 This is a schematic diagram of the structure of the L-shaped rod, the second elastic member and the pressure rod of the utility model.
[0010] Figure 4 This is a structural diagram of the telescopic rod, the first elastic member and the pressing plate of the utility model.
[0011] Figure 5 This is a schematic diagram of the structure of the guide plate, fixed plate and pressing plate of the utility model.
[0012] Explanation of numbers: 1-workbench, 2-first mounting frame, 3-electric slide rail, 4-second mounting frame, 5-first cylinder, 6-second cylinder, 7-mounting block, 8-clamping assembly, 9-welding assembly, 10-telescopic rod, 11-first elastic member, 12-pressure plate, 13-sensor, 14-transmitter, 15-L-shaped rod, 16-second elastic member, 17-pressure rod, 18-guide plate, 19-fixing plate, 20-pressure plate, 21-screw, 22-battery assembly. DETAILED DESCRIPTION
[0013] The preferred technical solution of the present utility model is described in detail below with reference to the accompanying drawings.
[0014] A spot welding machine for lithium battery processing, such as Figure 1-Figure 5As shown, it includes a workbench 1, a first mounting frame 2 and an electric slide rail 3; the top of the workbench 1 is fixedly connected to the first mounting frame 2, and the electric slide rail 3 is installed inside the first mounting frame 2; it is characterized in that it also includes a second mounting frame 4, a first cylinder 5, a second cylinder 6, a mounting block 7, a clamping assembly 8 and a welding assembly 9; the slider provided on the electric slide rail 3 is fixedly connected to the second mounting frame 4, the top of the second mounting frame 4 is fixedly connected to the first cylinder 5, and the piston rod of the first cylinder 5 passes downward through the second mounting frame 4; the end of the piston rod of the first cylinder 5 is connected to the second cylinder 6; the electric slide rail 3 can make the second The mounting frame 4 moves laterally, thereby moving the mounting block 7. The first cylinder 5 can move the second cylinder 6 upward, so that the height of the second cylinder 6 can be controlled according to the height of the battery assembly 22, and the second cylinder 6 can move the mounting block 7 forward; the piston rod of the second cylinder 6 extends forward and the end is connected to the mounting block 7, and a welding assembly 9 is installed on the front side of the mounting block 7, and a clamping assembly 8 is connected to the welding assembly 9; the tab can be pressed and fixed on the top of the battery assembly 22 by the clamping assembly 8 to prevent the tab from detaching from the battery assembly 22 during the welding process, thereby improving the processing accuracy and reducing the processing scrap rate.
[0015] Place the battery assembly 22 on the top of the workbench 1, with the battery assembly 22 located below the welding assembly 9, and then place the tab on top of the battery assembly 22. The first cylinder 5 drives the second cylinder 6 to move downward, so that the clamping assembly 8 presses the tab downward, and the tab is tightly attached to the battery assembly 22. Spot welding is then performed through the welding assembly 9. Under the joint action of the electric slide rail 3, the first cylinder 5, and the second cylinder 6, the welding assembly 9 can be close to a welding point farther away from it. After welding is completed, the battery assembly 22 can be taken out.
[0016] like Figures 1-4 As shown, the clamping assembly 8 includes a telescopic rod 10, the clamping assembly 8 includes a telescopic rod 10, a first elastic member 11 and a pressure plate 12, the left and right sides of the welding assembly 9 are fixedly connected to the telescopic rod 10, and the bottom of the telescopic rod 10 is fixedly connected to the pressure plate 12; the pressure plate 12 is made of smooth material, which can prevent the pressure plate 12 from wearing the pole ear, the welding head in the welding assembly 9 passes through the pressure plate 12, a cover is provided at the top of the telescopic rod 10, and a first elastic member 11 is provided on the outer periphery of the telescopic rod 10, and the first elastic member 11 is located between the cover and the welding assembly 9. Initially, the first elastic member 11 is in normal state. When the first cylinder 5 drives the mounting block 7 to move downward so that the clamping assembly 8 squeezes the tab and the battery assembly 22, the telescopic rod 10 moves downward so that the pressure plate 12 squeezes the tab, the telescopic rod 10 shortens, and the first elastic member 11 is compressed. When the first cylinder 5 drives the mounting block 7 to move upward so that the clamping assembly 8 moves away from the tab and the battery assembly 22, the first elastic member 11 returns to its original state so that the telescopic rod 10 extends and returns to its original state, thereby fixing the tab during the welding operation.
[0017] like Figure 1-Figure 3As shown, it also includes an L-shaped rod 15, a second elastic member 16, and a pressure rod 17. One end of the L-shaped rod 15 is rotatably connected to the front side of the mounting block 7. A limit plate is provided in the middle of the L-shaped rod 15. The second elastic member 16 is sleeved around the outer periphery of the L-shaped rod 15 and is located between the limit plate and the mounting block 7. The other end of the L-shaped rod 15 is connected to the pressure rod 17 for pressing the tab. The second elastic member 16 is configured as a torsion spring, and the surface of the pressure rod 17 is smooth to prevent the pressure rod 17 from wearing the tab. When the battery assembly 22 is placed under the welding assembly 9, the L-shaped rod 15 is rotated to cause the pressure rod 17 to squeeze the tab, and the second elastic member 16 is compressed. When the electric slide rail 3 drives the mounting block 7 to move left and right, the pressure rod 17 moves left and right on the top of the tab, and can squeeze and fix the tab when the clamping assembly 8 is away from the tab, so that the tab and the battery assembly 22 remain in close contact. When the battery assembly 22 is taken out of the workbench 1, the pressure rod 17 is away from the battery assembly 22, and the second elastic member 16 returns to its original state, causing the L-shaped rod 15 to rotate and reset.
[0018] like Figure 3 and Figure 4 As shown, the system also includes a sensor 13 and a transmitter 14. The sensor 13 is mounted on the bottom of the mounting block 7 and is electrically connected to the welding assembly 9. The transmitter 14 is mounted on the rear side of the pressure plate 12 and is electrically connected to the sensor 13. The sensor 13 receives signals from the transmitter 14. When the telescopic rod 10 is in its normal position, the sensor 13 is positioned higher than the transmitter 14. When the telescopic rod 10 is extended, the transmitter 14 on the pressure plate 12 is aligned with the sensor 13. Upon receiving the signal from the transmitter 14, the sensor 13 triggers the welding assembly 9 to weld the tab to the battery assembly 22, further improving welding accuracy.
[0019] like Figure 1 、 Figure 2 and Figure 5 As shown, the workbench 1 also includes a guide plate 18, a fixed plate 19, a clamping plate 20, and a screw 21. The top of the workbench 1 is fixedly connected to the guide plate 18 and the fixed plate 19, and the top of the workbench 1 is slidably connected to the clamping plate 20, so that the clamping plate 20 is slidably connected to the fixed plate 19. A screw 21 is threadedly connected between the clamping plate 20 and the fixed plate 19. The screw 21 is used to control the forward and backward sliding distance of the clamping plate 20. When the battery assembly 22 needs to be processed, the battery assembly 22 is placed between the guide plate 18 and the clamping plate 20. The distance between the clamping plate 20 and the guide plate 18 is controlled by the screw 21, so that the guide plate 18 and the clamping plate 20 clamp and fix the battery assembly 22. This makes it suitable for battery assemblies 22 of different widths, ensuring that the battery assembly 22 is located below the welding assembly 9. It can also ensure that the battery assembly 22 is fixed on the workbench 1 to prevent the battery assembly 22 from moving during welding, resulting in welding failure.
[0020] like Figure 1 、 Figure 2 and Figure 5 As shown, buffer plates are fixedly connected to the facing sides of the guide plate 18 and the pressure plate 20. The buffer plates also prevent the battery assembly 22 from sliding between the guide plate 18 and the pressure plate 20. When the guide plate 18 and the pressure plate 20 secure the battery assembly 22, the buffer plates prevent the guide plate 18 and the pressure plate 20 from clamping the battery assembly 22 with excessive force, which could damage the battery assembly 22.
[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A spot welding machine for processing lithium batteries, comprising a workbench (1), a first mounting frame (2) and an electric slide rail (3); the top of the workbench (1) is fixedly connected to the first mounting frame (2), and the electric slide rail (3) is installed inside the first mounting frame (2); characterized in that, The invention also includes a second mounting frame (4), a first cylinder (5), a second cylinder (6), a mounting block (7), a clamping assembly (8) and a welding assembly (9); a slider provided on the electric slide rail (3) is fixedly connected to the second mounting frame (4); the top of the second mounting frame (4) is fixedly connected to the first cylinder (5); the piston rod of the first cylinder (5) passes downward through the second mounting frame (4); the end of the piston rod of the first cylinder (5) is connected to the second cylinder (6); the piston rod of the second cylinder (6) extends forward and the end is connected to the mounting block (7); a welding assembly (9) is installed on the front side of the mounting block (7); and the clamping assembly (8) is connected to the welding assembly (9).
2. A spot welding machine for lithium battery processing according to claim 1, characterized in that: The clamping assembly (8) comprises a telescopic rod (10), a first elastic member (11) and a pressure plate (12); the left and right sides of the welding assembly (9) are fixedly connected to the telescopic rod (10), and the bottom of the telescopic rod (10) is fixedly connected to the pressure plate (12); a cover is provided at the top of the telescopic rod (10), and the first elastic member (11) is sleeved on the outer periphery of the telescopic rod (10); the first elastic member (11) is located between the cover and the welding assembly (9).
3. A spot welding machine for lithium battery processing according to claim 1, characterized in that: The utility model further comprises an L-shaped rod (15), a second elastic member (16) and a pressing rod (17). One end of the L-shaped rod (15) is rotatably connected to the front side of the mounting block (7). A limiting plate is provided in the middle of the L-shaped rod (15). The second elastic member (16) is sleeved on the outer periphery of the L-shaped rod (15) and is located between the limiting plate and the mounting block (7). The other end of the L-shaped rod (15) is connected to the pressing rod (17) for pressing the tab.
4. A spot welding machine for lithium battery processing according to claim 1, characterized in that: It also includes a sensor (13) and a transmitter (14); the sensor (13) is installed at the bottom of the mounting block (7), and the sensor (13) is electrically connected to the welding assembly (9); the transmitter (14) is installed on the rear side of the pressure plate (12), and the transmitter (14) is electrically connected to the sensor (13).
5. A spot welding machine for lithium battery processing according to claim 1, characterized in that: The workbench (1) further comprises a guide plate (18), a fixed plate (19), a pressing plate (20) and a screw (21); the top of the workbench (1) is fixedly connected to the guide plate (18) and the fixed plate (19); the top of the workbench (1) is slidably connected to the pressing plate (20), so that the pressing plate (20) and the fixed plate (19) are slidably connected; a screw (21) is threadedly connected between the pressing plate (20) and the fixed plate (19).
6. A spot welding machine for lithium battery processing according to claim 5, characterized in that: Buffer plates are fixedly connected to the facing sides of the guide plate (18) and the pressing plate (20).