Resistance welding equipment for battery tabs

Abstract

The invention relates to the technical field of battery tab resistance welding, in particular to battery tab resistance welding equipment which comprises a machine body, a machining table is installed on the lower side of the front face of the machine body, a first electrode is installed on the top face of the machining table, an air cylinder is installed on the upper side of the front face of the machine body, and a second electrode is installed at the extending end of the air cylinder; a moving structure is installed on the top face of the machining table and comprises a threaded rod, the threaded rod is movably installed on the top face of the machining table through a bearing, and a gear is fixedly connected to the rear end of the threaded rod. According to the welding equipment, the base is arranged to be matched with the pressing plate, a plurality of sheet materials can be clamped and fixed, the safety of the device is improved while the flatness of the sheet materials is guaranteed, the base and the pressing plate are located between the first electrode and the second electrode, after welding is finished, the sheet materials can be automatically separated from the first electrode and the second electrode, functionality is high, and the welding efficiency is improved. And the use requirements of existing tab resistance welding can be better met.

Description

Technical Field

[0001] This invention relates to the field of resistance welding technology for battery tabs, specifically to a resistance welding device for battery tabs. Background Technology

[0002] Batteries have positive and negative terminals. The tabs are the metal conductors that lead the positive and negative terminals out of the battery cell. In layman's terms, the tabs of the positive and negative terminals of the battery are the contact points during charging and discharging. These contact points are not the copper plates on the outside of the battery that we see, but a kind of connection inside the battery. There are three types of materials for the tabs: aluminum (Al) is used for the positive terminal, nickel (Ni) is used for the negative terminal, and there is also copper-plated nickel (Ni-Cu) material for the negative terminal. During the production of the tabs, a resistance welding machine is used to combine the film and the metal strip. A tab consists of two films sandwiching the metal strip in the middle.

[0003] The electrode tab is composed of multiple metal sheets and films. Since the metal sheets and films are cut directly from the rolled state, they have a certain degree of curvature. In order to ensure a tight connection between multiple sheets, it is necessary to manually spread out the multiple sheets and fix them manually during welding. However, resistance welding refers to using the resistance heat generated by the current passing through the workpiece and the contact area as a heat source to locally heat the workpiece and apply pressure. Therefore, during welding, the contact area between the welding machine and the sheet will generate high temperature, which can easily burn the user and pose a certain safety hazard.

[0004] Therefore, in order to solve the above problems, a resistance welding device for battery tabs is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a resistance welding device for battery tabs, in order to solve the problem mentioned in the background art that when welding tabs, multiple sheets need to be manually spread out and fixed, which can easily burn users and pose certain safety hazards.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a resistance welding device for battery tabs, comprising: a body, a processing table mounted on the lower front side of the body, a first electrode mounted on the top surface of the processing table, a cylinder mounted on the upper front side of the body, and a second electrode mounted on the extended end of the cylinder; A movable structure is installed on the top surface of the processing table. The movable structure includes a threaded rod, which is movably installed on the top surface of the processing table via a bearing. A gear is fixedly connected to the rear end of the threaded rod. A movable frame is threadedly connected to the outer side of the threaded rod. A telescopic rod is inserted inside the top surface of the movable frame. A first spring is fixedly connected to the bottom end of the telescopic rod. A base is fixedly connected to the upper end of the telescopic rod. A circular hole is opened on the surface of the base. A spiral groove rod is movably installed on the rear end of the top surface of the base via a bearing. A spiral groove block is fixedly connected to the upper end of the spiral groove rod. A first transmission wheel is fixedly connected to the top surface of the spiral groove rod. A pressure plate is movably installed on the upper side of the base. A guide ball is fixedly welded to the rear end of the pressure plate. A circular groove is opened on the surface of the pressure plate. Handles are fixedly installed on the left and right side walls of the pressure plate. A rotating plate is rotatably connected to the bottom surface of the pressure plate. A second spring is fixedly connected to the bottom surface of the rotating plate. A connecting rod is fixedly connected to the side wall of the second electrode. A rack plate is fixedly connected to the bottom end of the connecting rod. A cleaning structure is installed on the movable structure, and the cleaning structure includes a connecting frame.

[0007] Preferably, the connecting frame is fixedly connected to the rear wall of the base, and an outer cylinder is fixedly connected to the rear end of the connecting frame. A rotating column is movably installed on the inner side of the outer cylinder via a bearing. A second transmission wheel is fixedly installed in the middle of the rotating column. A first transmission belt is sleeved on the outer side of the second transmission wheel. Mounting shells are fixedly connected to the upper and lower ends of the rotating column. Friction soft blocks are clamped on the inner side of the mounting shells. A collection box is installed on the outer wall of the outer cylinder and the first electrode.

[0008] Preferably, the first electrode and the second electrode cooperate with each other, the gear meshes with the rack plate, and one end of the first spring is fixedly connected to the inner wall of the movable frame.

[0009] Preferably, the base is located above the first electrode, the inner diameters of the circular hole and the circular groove are equal and aligned vertically, and the inner diameter of the circular hole is larger than the diameter of the near ends of the first electrode and the second electrode.

[0010] Preferably, a spiral groove is formed on the outer wall of the spiral groove rod, the spiral groove rod passes through the pressure plate, and the guide ball is slidably installed inside the spiral groove.

[0011] Preferably, the second spring is sleeved on the outside of the spiral groove rod, one end of the second spring is fixedly connected to the base, and the rack plate passes through the processing table.

[0012] Preferably, the outer cylinder is located between the first electrode and the second electrode, one end of the first transmission belt is sleeved on the outside of the first transmission wheel, and the two sets of friction blocks respectively abut against the first electrode and the second electrode.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the welding equipment of the present invention can clamp and fix multiple sheet materials by setting a base and a pressure plate, which ensures the flatness of the sheet materials and improves the safety of the device. Furthermore, the base and pressure plate are located between the first electrode and the second electrode, which can automatically separate the sheet material from the first electrode and the second electrode after welding. It has strong functionality and is more suitable for the use requirements of existing electrode tab resistance welding.

[0014] Equipped with a moving structure and a cleaning structure, pulling the handle upwards moves the pressure plate away from the base. The pressure plate pulls the second spring, causing it to elastically deform. The pressure plate then rises outside the spiral groove rod. The guide ball is engaged in the spiral groove on the outer wall of the spiral groove rod. Therefore, when the pressure plate rises, the guide ball slides in the spiral groove, causing the spiral groove rod to rotate. The rotation of the spiral groove rod drives the first transmission wheel to rotate, which in turn drives the second transmission wheel to rotate via the first transmission belt. The second transmission wheel drives the rotating column to rotate, which in turn drives the mounting shell and friction blocks to rotate. The two sets of friction blocks contact the ends of the first and second electrodes respectively. The rotating friction blocks scrape the ends of the first and second electrodes, keeping them clean and ensuring the current flow between the first and second electrodes. Next, the guide ball moves from the surface of the spiral groove rod to the outside of the spiral groove block. The spiral groove block magnetically connects with the pressure plate, fixing the pressure plate to the upper end of the spiral groove rod to keep the base and pressure plate far apart. At this point, the sheet material can be placed on the base surface and spread out. Then, press down on the handle to move the pressure plate from the outside of the spiral groove block to the outside of the spiral groove rod. At this point, the spiral groove block releases its fixation on the pressure plate, and the pressure plate presses against the top surface of the sheet material under the elastic action of the second spring. By observing the position of the circular groove on the sheet material, the welding position of the sheet material can be quickly determined. After placement, the cylinder is activated, which drives the second electrode to descend. The pole drives the connecting rod and rack plate to descend. The rack plate meshes with the gear, and the rack plate drives the threaded rod to rotate through the gear. The threaded rod is threadedly connected to the moving frame. The rotation of the threaded rod drives the moving frame to move backward. The moving frame then moves the sheet material between the first electrode and the second electrode. When the first electrode, the circular hole, the circular groove, and the second electrode are aligned vertically, the rack plate separates from the gear. Therefore, the continued descent of the second electrode can no longer drive the moving frame to move. The second electrode then passes downward through the circular groove and fits against the top surface of the sheet material, then pushes the sheet material downward, causing the pressure plate, the base, and the telescopic rod to move downward on the moving frame. The telescopic rod then compresses the first spring, causing the first spring to undergo elastic deformation. The first electrode passes upward through the circular hole and fits against the bottom surface of the sheet material. Then, the sheet material can be welded using the first and second electrodes. After welding, the cylinder lifts the second electrode, releasing the pressure on the sheet material. The telescopic rod, base, and pressure plate then return to their original position under the elastic action of the first spring, causing the sheet material to rise above the first electrode. The bottom surface of the sheet material separates from the first electrode. When the telescopic rod is fully raised from the moving frame, the base and pressure plate can no longer follow the second electrode. Under the action of the second spring, the pressure plate presses down on the sheet material, separating the top surface of the sheet material from the second electrode. This allows the sheet material to automatically weld with the second electrode after welding. The separation of the first and second electrodes improves the functionality of the device. As the second electrode rises, the rack plate meshes with the gear, causing the rack plate to rotate and the gear to move forward. This allows the sheet material to be moved to the front of the device, and the friction block can be squeezed to the ends of the first and second electrodes and come into contact with them. At this time, pulling the handle upwards can remove the pressure plate from the sheet material, making it easier to pick up and put down the sheet material on the base. When the pressure plate moves on the upper side of the base, it can drive the friction block to rotate. The friction block can clean the ends of the first and second electrodes, and the cleaned impurities can be collected in the collection box to reduce contamination of the work station. Attached Figure Description

[0015] Figure 1 This is a front view schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the separation structure of the second electrode and the first electrode of the present invention; Figure 3This is an exploded view of the processing table of the present invention; Figure 4 This is an exploded view of the threaded rod structure of the present invention; Figure 5 This is an exploded view of the structure of the mobile frame of the present invention; Figure 6 This is an exploded view of the structure of the base of the present invention; Figure 7 This is a bottom view sectional diagram of the pressure plate structure of the present invention; Figure 8 This is an exploded view of the spiral groove rod of the present invention; Figure 9 This is a side cross-sectional view of the outer cylinder and friction soft block of the present invention.

[0016] In the diagram: 1. Machine body; 11. Processing table; 12. First electrode; 13. Cylinder; 14. Second electrode; 2. Moving structure; 21. Threaded rod; 22. Gear; 23. Moving frame; 24. Telescopic rod; 25. First spring; 26. Base; 27. Circular hole; 28. Spiral groove rod; 29. ​​Spiral groove block; 210. First transmission wheel; 211. Pressure plate; 212. Guide ball; 213. Circular groove; 214. Handle; 215. Rotating plate; 216. Second spring; 217. Connecting rod; 218. Rack plate; 3. Cleaning structure; 31. Connecting frame; 32. Outer cylinder; 33. Rotating column; 34. Second transmission wheel; 35. First transmission belt; 36. Mounting shell; 37. Friction block; 38. Collection box. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-9 One embodiment provided by the present invention: The body 1, processing table 11, first electrode 12, cylinder 13 and second electrode 14 used in this application are products that can be directly purchased on the market. Their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be described in detail here.

[0019] A resistance welding device for battery tabs includes: a body 1, a processing table 11 mounted on the lower front side of the body 1, a first electrode 12 mounted on the top surface of the processing table 11, a cylinder 13 mounted on the upper front side of the body 1, and a second electrode 14 mounted on the extended end of the cylinder 13. A movable structure 2 is installed on the top surface of the processing table 11. The movable structure 2 includes a threaded rod 21, which is movably mounted on the top surface of the processing table 11 via bearings. A gear 22 is fixedly connected to the rear end of the threaded rod 21. A movable frame 23 is threadedly connected to the outer side of the threaded rod 21. A telescopic rod 24 is inserted inside the top surface of the movable frame 23. A first spring 25 is fixedly connected to the bottom end of the telescopic rod 24. A base 26 is fixedly connected to the upper end of the telescopic rod 24. A circular hole 27 is opened on the surface of the base 26. A spiral grooved rod 28 is movably mounted on the rear end of the top surface of the base 26 via bearings. A spiral grooved block 29 is fixedly connected to the upper end of the spiral grooved rod 28. A first transmission wheel 210 is fixedly connected to the top surface of the spiral grooved rod 28. A pressure plate 211 is movably mounted on the upper side of the base 26. The rear end of the pressure plate 211 is fixedly welded. The device has a guide ball 212, a circular groove 213 on the surface of the pressure plate 211, handles 214 fixedly installed on the left and right side walls of the pressure plate 211, a rotating plate 215 rotatably connected to the bottom surface of the pressure plate 211, a second spring 216 fixedly connected to the bottom surface of the rotating plate 215, a connecting rod 217 fixedly connected to the side wall of the second electrode 14, and a rack plate 218 fixedly connected to the bottom end of the connecting rod 217. Through the base 26 and the pressure plate 211, multiple sheet materials can be clamped and fixed, ensuring the flatness of the sheet materials and improving the safety of the device. Furthermore, the base 26 and the pressure plate 211 are located between the first electrode 12 and the second electrode 14, which can automatically separate the sheet materials from the first electrode 12 and the second electrode 14 after welding. It has strong functionality and is more suitable for the use requirements of existing electrode tab resistance welding. A cleaning structure 3 is installed on the movable structure 2, and the cleaning structure 3 includes a connecting frame 31.

[0020] Furthermore, the connecting frame 31 is fixedly connected to the rear wall of the base 26, and the rear end of the connecting frame 31 is fixedly connected to the outer cylinder 32. The inner side of the outer cylinder 32 is movably mounted with a rotating column 33 via a bearing. The middle part of the rotating column 33 is fixedly mounted with a second transmission wheel 34. The outer side of the second transmission wheel 34 is fitted with a first transmission belt 35. The upper and lower ends of the rotating column 33 are fixedly connected with mounting shells 36. The inner side of the mounting shell 36 is fitted with friction soft blocks 37. A collection box 38 is installed on the outer wall of the outer cylinder 32 and the first electrode 12.

[0021] Furthermore, the first electrode 12 and the second electrode 14 cooperate with each other, the gear 22 meshes with the rack plate 218, one end of the first spring 25 is fixedly connected to the inner wall of the moving frame 23, the movement of the rack plate 218 can cooperate with the gear 22 to drive the threaded rod 21 to rotate, and the first spring 25 provides power for the telescopic rod 24 to reset on the moving frame 23, so that the bottom surface of the sheet material is separated from the first electrode 12.

[0022] Furthermore, the base 26 is located above the first electrode 12. The inner diameters of the circular hole 27 and the circular groove 213 are equal and aligned vertically. The inner diameter of the circular hole 27 is larger than the diameter of the near ends of the first electrode 12 and the second electrode 14. There is a height difference between the base 26 and the first electrode 12, so that the bottom surface of the sheet can be separated from the first electrode 12. The first electrode 12 and the second electrode 14 can penetrate the base 26 and the pressure plate 211 through the circular hole 27 and the circular groove 213 to contact the sheet.

[0023] Furthermore, a spiral groove is formed on the outer wall of the spiral groove rod 28, the spiral groove rod 28 passes through the pressure plate 211, and the guide ball 212 is slidably installed inside the spiral groove. The movement of the pressure plate 211 can drive the spiral groove rod 28 to rotate through the guide ball 212 and the spiral groove.

[0024] Furthermore, the second spring 216 is sleeved on the outside of the spiral groove rod 28, one end of the second spring 216 is fixedly connected to the base 26, the rack plate 218 passes through the processing table 11, and the second spring 216 provides power for the pressure plate 211 to approach the base 26 to clamp the sheet material.

[0025] Furthermore, the outer cylinder 32 is located between the first electrode 12 and the second electrode 14. One end of the first transmission belt 35 is sleeved on the outside of the first transmission wheel 210. The two sets of friction soft blocks 37 respectively abut against the first electrode 12 and the second electrode 14. The rotation of the first transmission wheel 210 can drive the rotating column 33 to rotate through the first transmission belt 35 and the second transmission wheel 34, so as to realize the rotation of the two sets of friction soft blocks 37 and provide power for the friction soft blocks 37 to clean the first electrode 12 and the second electrode 14.

[0026] Working principle: During processing, pulling the handle 214 upwards will cause the pressure plate 211 to move upwards away from the base 26. The pressure plate 211 will pull the second spring 216, causing the second spring 216 to undergo elastic deformation. The pressure plate 211 will then rise outside the spiral groove rod 28. The guide ball 212 is stuck in the spiral groove on the outer wall of the spiral groove rod 28. Therefore, when the pressure plate 211 rises, the guide ball 212 will slide in the spiral groove, thus driving the spiral groove rod 28 to rotate. When the spiral groove rod 28 rotates, it will drive the first transmission wheel 210 to rotate. The transmission wheel 210 drives the second transmission wheel 34 to rotate via the first transmission belt 35. The second transmission wheel 34 drives the rotating column 33 to rotate, which in turn drives the mounting shell 36 and the friction soft block 37 to rotate. The two sets of friction soft blocks 37 respectively contact the ends of the first electrode 12 and the second electrode 14. The rotating friction soft block 37 can scrape the ends of the first electrode 12 and the second electrode 14, keeping the ends of the first electrode 12 and the second electrode 14 clean and ensuring the current effect between the first electrode 12 and the second electrode 14. Next, the guide ball 212 moves from the surface of the spiral groove rod 28 to the outside of the spiral groove block 29. The spiral groove block 29 is magnetically connected to the pressure plate 211, which fixes the pressure plate 211 to the upper end of the spiral groove rod 28, keeping the base 26 and the pressure plate 211 far apart. At this time, the sheet material can be placed on the surface of the base 26 and spread out. Then, press down the handle 214 to move the pressure plate 211 from the outside of the spiral groove block 29 to the outside of the spiral groove rod 28. At this time, the spiral groove block 29 releases the fixation of the pressure plate 211. The pressure plate 211 can then press on the top surface of the sheet material under the elastic action of the second spring 216. By observing the position of the circular groove 213 on the sheet material, the welding position of the sheet material can be quickly determined. After placement, cylinder 13 is activated, causing the second electrode 14 to descend. The second electrode 14 then causes the connecting rod 217 and rack plate 218 to descend. The rack plate 218 meshes with gear 22, which in turn drives the threaded rod 21 to rotate via gear 22. The threaded rod 21 is threadedly connected to the moving frame 23. The rotation of the threaded rod 21 causes the moving frame 23 to move backward, thus moving the sheet material between the first electrode 12 and the second electrode 14. When the first electrode 12, the circular hole 27, the circular groove 213, and the second electrode 14 are vertically aligned... The rack plate 218 separates from the gear 22, so the continued descent of the second electrode 14 cannot drive the moving frame 23 to move. The second electrode 14 then passes downward through the circular groove 213 and adheres to the top surface of the sheet material. Then it pushes the sheet material downward, causing the pressure plate 211, the base 26, and the telescopic rod 24 to move downward on the moving frame 23. The telescopic rod 24 then compresses the first spring 25, causing the first spring 25 to undergo elastic deformation, so that the first electrode 12 passes upward through the circular hole 27 and adheres to the bottom surface of the sheet material. Then, the sheet material can be welded through the first electrode 12 and the second electrode 14. After welding is completed, cylinder 13 drives the second electrode 14 to rise, and the second electrode 14 releases the pressure on the sheet material. The telescopic rod 24, base 26 and pressure plate 211 are then reset upward under the elastic action of the first spring 25, causing the sheet material to rise above the first electrode 12. The bottom surface of the sheet material is then separated from the first electrode 12. When the telescopic rod 24 is fully raised from the moving frame 23, the base 26 and pressure plate 211 can no longer follow the second electrode 14 to continue moving. Under the action of the second spring 216, the sheet material can be pressed down by the pressure plate 211, causing the top surface of the sheet material to separate from the second electrode 14. This allows the sheet material to automatically separate from the first electrode 12 and the second electrode 14 after welding, improving the functionality of the device. As the second electrode 14 rises, the rack plate 218 meshes with the gear 22, causing the rack plate 218 to drive the gear 22 to rotate, thus moving the moving frame 23 forward. This allows the sheet material to be moved to the front of the device, and the friction block 37 can be squeezed to the ends of the first electrode 12 and the second electrode 14, making contact with them. At this time, pulling the handle 214 upwards can remove the pressure plate 211 from the sheet material, facilitating the loading and unloading of the sheet material on the base 26. When the pressure plate 211 moves on the upper side of the base 26, it can drive the friction block 37 to rotate. The friction block 37 can clean the ends of the first electrode 12 and the second electrode 14, and the cleaned impurities can be collected in the collection box 38 to reduce contamination of the work station.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. An electric resistance welding apparatus for battery tabs, comprising: The utility model relates to a processing device, including machine body (1), the positive lower side of machine body (1) is equipped with processing table (11), the top of processing table (11) is equipped with first electrode (12), the positive upper side of machine body (1) is equipped with cylinder (13), the protruding end of cylinder (13) is equipped with second electrode (14), It is characterized by: The top of processing table (11) is equipped with moving structure (2), moving structure (2) includes threaded rod (21), threaded rod (21) is movably installed on the top of processing table (11) through bearing, the rear end of threaded rod (21) is fixedly connected with gear (22), the outer side of threaded rod (21) is threadedly connected with moving frame (23), the top of moving frame (23) is inserted with telescopic rod (24), the bottom of telescopic rod (24) is fixedly connected with first spring (25), the upper end of telescopic rod (24) is fixedly connected with base (26), the surface of base (26) is provided with round hole (27), the top rear end of base (26) is movably installed with spiral groove rod (28) through bearing, the upper end of spiral groove rod (28) is fixedly connected with spiral groove block (29), the top of spiral groove rod (28) is fixedly connected with first transmission wheel (210), the upper side of base (26) is movably installed with pressing plate (211), the rear end of pressing plate (211) is fixedly welded with guide ball (212), the surface of pressing plate (211) is provided with circular groove (213), the left and right side walls of pressing plate (211) are fixedly installed with handle (214), the bottom of pressing plate (211) is rotatably connected with rotating piece (215), the bottom of rotating piece (215) is fixedly connected with second spring (216), the side wall of second electrode (14) is fixedly connected with connecting rod (217), the bottom of connecting rod (217) is fixedly connected with rack plate (218). The moving structure (2) is provided with cleaning structure (3), and the cleaning structure (3) comprises a connecting frame (31).

2. A resistance welding apparatus for battery tabs as defined in claim 1, characterized in that: The connecting frame (31) is fixedly connected to the rear wall of the base (26), the rear end of the connecting frame (31) is fixedly connected with an outer cylinder (32), the inner side of the outer cylinder (32) is movably installed with a rotating column (33) through a bearing, the middle part of the rotating column (33) is fixedly installed with a second transmission wheel (34), the outer side of the second transmission wheel (34) is sleeved with a first transmission belt (35), the upper and lower ends of the rotating column (33) are fixedly connected with a mounting shell (36), the inner side of the mounting shell (36) is clamped with a friction soft block (37), and the outer wall of the outer cylinder (32) and the first electrode (12) is provided with a collecting box (38).

3. The resistance welding apparatus for battery tabs of claim 1, wherein: The first electrode (12) and the second electrode (14) cooperate with each other, the gear (22) is engaged with the rack plate (218), and one end of the first spring (25) is fixedly connected with the inner wall of the moving frame (23).

4. The resistance welding apparatus for battery tabs of claim 1, wherein: The base (26) is located on the upper side of the first electrode (12), the inner diameter of the round hole (27) and the round groove (213) is equal, and the upper and lower are aligned, the inner diameter of the round hole (27) is larger than the diameter of the proximal end of the first electrode (12) and the second electrode (14).

5. The resistance welding apparatus for battery tabs of claim 1, wherein: The outer wall of the spiral groove rod (28) is provided with a spiral groove, the spiral groove rod (28) penetrates the pressing plate (211), and the guide ball (212) is slidingly installed in the spiral groove.

6. The resistance welding apparatus for battery tabs of claim 1, wherein: The second spring (216) is sleeved on the outer side of the spiral groove rod (28), one end of the second spring (216) is fixedly connected with the base (26), and the rack plate (218) penetrates the machining table (11).

7. The resistance welding apparatus for battery tabs of claim 2, wherein: The outer cylinder (32) is located between the first electrode (12) and the second electrode (14), one end of the first transmission belt (35) is sleeved on the outer side of the first transmission wheel (210), and two groups of the friction soft blocks (37) abut against the first electrode (12) and the second electrode (14) respectively.

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