Cylindrical battery piece welding tool

Abstract

The utility model provides a cylindrical battery piece welding tool, and relates to the field of battery production. The positioning assembly comprises a positioning seat and a lifting device, the positioning seat is arranged above the bottom plate, the top surface of the positioning seat is provided with a mounting groove matched with a cylindrical battery, the top surface of the positioning seat is also provided with a positioning groove for mounting a positioning bar chip, the positioning groove is communicated with the mounting groove, the lifting device is arranged below the bottom plate, and the lifting device is arranged below the bottom plate. The positioning seat can move up and down; the pressing assembly comprises a pressing piece and a translation device, the pressing piece is located above the positioning seat and can horizontally move relative to the bottom plate, a welding through hole is formed in the pressing piece, and the translation device is arranged on the bottom plate and used for driving the pressing piece to horizontally move, so that the welding through hole corresponds to a welding area of the bar and the battery in the height direction. By means of the mechanical lifting and translation device, automatic pressing and positioning of the pressing piece are achieved, the assembling and disassembling time is shortened, and the welding efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a cylindrical battery bar welding tool. Background Art

[0002] In the related art, when performing random inspections on the performance of cylindrical batteries, workers are usually required to weld metal bars for connecting to test equipment on the positive and negative poles of the cylindrical batteries, and use the lead-out metal bars to conduct electricity on the test equipment to test its performance.

[0003] In some prior arts, the welding operation between the cylindrical battery pole and the metal bar needs to be implemented with the help of tooling. For example, the patent with announcement number CN219379527U discloses a cylindrical battery bar welding device, which pre-positions the cylindrical battery through the center hole groove on the positioning seat, and uses the bar positioning groove on the positioning boss to support and limit the bar, so that the bar can be stably docked with the cylindrical battery, and finally uses the welding through hole on the cover plate to stably weld the docking position.

[0004] Although the solution disclosed in this patent can achieve accurate and reliable welding between the battery pole and the tab, it still has some problems. Specifically, after the cylindrical battery and the tab are assembled and positioned on the positioning seat, it is necessary to manually place the cover plate on the top surface of the positioning seat to press the cylindrical battery and the tab to ensure that the cover plate is positioned and fixed on the positioning seat. Although the above patent can achieve horizontal positioning of the cover plate and the positioning seat, it cannot effectively achieve the compression of the cylindrical battery and the tab. Bolts or other methods are needed to keep the cover plate and the positioning seat fixed in the height direction. However, this method will cause the cover plate to be inconvenient to disassemble and assemble on the positioning seat, thereby reducing the efficiency of welding work. Utility Model Content

[0005] In view of this, the utility model proposes a cylindrical battery bar welding tool to solve the problem that the existing welding tool needs to disassemble and assemble the cover plate when welding the battery pole and the bar, resulting in low welding efficiency.

[0006] The technical solution of the utility model is achieved in this way:

[0007] The utility model provides a cylindrical battery bar welding tool, comprising:

[0008] Base plate;

[0009] The positioning assembly includes a positioning seat and a lifting device, wherein the positioning seat is arranged above the bottom plate, the top surface of the positioning seat has a mounting groove matching the cylindrical battery, the top surface of the positioning seat is also provided with a positioning groove for installing a positioning bar, the positioning groove is connected to the mounting groove, and the lifting device is arranged below the bottom plate, and is used to drive the positioning seat to move up and down;

[0010] The clamping assembly includes a clamping piece and a translation device. The clamping piece is located above the positioning seat and can move horizontally relative to the base plate. A welding through hole is provided on the clamping piece. The translation device is arranged on the base plate and is used to drive the clamping piece to move horizontally so that the welding through hole corresponds to the welding area of ​​the bar sheet and the battery in the height direction.

[0011] On the basis of the above technical solution, preferably, the positioning groove includes a first positioning groove and a second positioning groove, the first positioning groove and the second positioning groove are located on both sides of the radial direction of the mounting groove, the depth of the first positioning groove is less than the depth of the second positioning groove, the first positioning groove is used to place the first bar connected to the pole, and the second positioning groove is used to place the second bar connected to the top surface of the battery casing.

[0012] Further, preferably, a first positioning pin is fixedly disposed in both the first positioning groove and the second positioning groove.

[0013] On the basis of the above technical solution, preferably, the clamping member includes a cover plate and support seats fixed at both ends of the cover plate in the length direction, the spacing between the two support seats is greater than the width of the positioning seat along the first direction, the translation device is used to drive the support seat to move horizontally on the base plate along the second direction, the first direction and the second direction are perpendicular, the first direction is the direction of the connection between the first positioning groove and the second positioning groove, the cover plate is located on the top surface of the positioning seat, and the welding through hole is set on the cover plate.

[0014] Further, preferably, the welding through hole includes a first welding through hole and a second welding through hole arranged along a first direction, the first welding through hole is coaxial with the mounting groove, the second welding through hole is located on one side of the first welding through hole, and the second welding through hole is used to correspond to the side of the top surface of the battery shell facing the first positioning groove.

[0015] Further, preferably, the cover plate bottom panel is provided with a first boss and a second boss, the first boss is provided around the first welding through hole, the second boss is provided around the second welding through hole, and the height of the first boss is smaller than that of the second boss.

[0016] Furthermore, preferably, at least one second positioning pin is further provided on the top surface of the positioning seat, and a positioning hole matching with the second positioning pin is provided on the cover plate.

[0017] On the basis of the above technical solution, preferably, it also includes a support frame, which is fixedly arranged directly below the base plate, the lifting device includes a lifting cylinder and a fixing part, a through hole is opened on the base plate, the fixing part is arranged in the through hole, the positioning seat is detachably fixed on the fixing part, the lifting cylinder is fixedly arranged below the base plate, and the telescopic end of the lifting cylinder vertically passes through the through hole upward and is fixedly connected to the fixing part.

[0018] On the basis of the above technical scheme, preferably, the translation device includes a translation cylinder, a slide rail and a slider, and two slide rails are arranged in parallel. The two slide rails are fixedly arranged on the base plate on both sides of the positioning seat along a first direction, and the support seat is slidably connected to the slide rail through the slider. The fixed end of the translation cylinder is fixedly arranged on the base plate, and the telescopic end of the translation cylinder is fixedly connected to the support seat, and the telescopic end of the translation cylinder is parallel to the length direction of the slide rail.

[0019] Preferably, the top surface of the positioning seat is provided with an avoidance groove which is connected with the mounting groove.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] (1) The cylindrical battery bar welding tool disclosed in the utility model, through the setting of the lifting device and the translation device, allows the positioning seat and the clamping member to be easily moved up and down and horizontally, reducing the steps of manual adjustment and fixing, and improving the convenience of operation. Compared with the prior art that requires manual disassembly and assembly of the cover plate, the utility model realizes the automatic clamping and positioning of the clamping member through the mechanical lifting and translation device, reducing the time of assembly and disassembly, and significantly improving the welding efficiency.

[0022] (2) The first boss and the second boss are arranged on the bottom panel of the cover plate, the first boss is arranged around the first welding through hole, the second boss is arranged around the second welding through hole, and the height of the first boss is smaller than the second boss. Thus, the boss design of different heights helps to adapt to the different heights and shapes of the battery and the tab surface, ensuring the stability and compression effect of the cover plate during welding. The tab and the battery welding position are compressed by the boss, so that the corresponding tab and battery welding position can be welded through the boss.

[0023] (3) A support frame is fixedly arranged directly below the bottom plate, and the bottom plate is supported and fixed by the support frame. Thus, the lifting device can be placed between the bottom plate and the support frame, avoiding the lifting device being directly arranged above the bottom plate and occupying a large space, thereby making the entire tooling structure compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1It is a three-dimensional structural schematic diagram of the cylindrical battery tab welding tooling disclosed in the utility model;

[0026] Figure 2 It is a schematic diagram of the assembly structure of the positioning seat, cylindrical battery and bar piece disclosed in the utility model;

[0027] Figure 3 It is a three-dimensional structural schematic diagram of the pressing member disclosed in the utility model;

[0028] Figure 4 It is a top view of the cylindrical battery tab welding tool disclosed in the utility model;

[0029] Figure 5 for Figure 4 Plane section view at AA in the middle;

[0030] Reference numerals:

[0031] 1. Bottom plate; 2. Positioning assembly; 21. Positioning seat; 22. Lifting device; 211. Mounting slot; 212. Positioning slot; 3. Pressing assembly; 31. Pressing member; 32. Translation device; 310. Welding through hole; 2121. First positioning slot; 2122. Second positioning slot; B1. First bar; B2. Second bar; D1. First positioning pin; 311. Cover plate; 312. Support seat; 3101. First welding through hole; 3102. Second welding through hole; 313. First boss; 314. Second boss; 315. Positioning hole; D2. Second positioning pin; 4. Support frame; 221. Lifting cylinder; 222. Fixing member; 11. Through hole; 321. Translation cylinder; 322. Slide rail; 323. Slider; 213. Avoidance groove; S. Cylindrical battery. DETAILED DESCRIPTION

[0032] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] like Figure 1 As shown, combined Figure 2-5 The utility model discloses a cylindrical battery bar welding tool, including a base plate 1, a positioning component 2 and a pressing component 3.

[0034] The base plate 1 is a basic platform of the welding tooling, and is used to provide an installation basis for the positioning assembly 2 and the clamping assembly 3 .

[0035] The positioning assembly 2 is used to install and position the cylindrical battery and the tab. In this embodiment, the positioning assembly 2 includes a positioning seat 21 and a lifting device 22. The positioning seat 21 is arranged above the bottom plate 1, and the lifting device 22 is arranged below the bottom plate 1 to drive the positioning seat 21 to move up and down. By moving the positioning seat 21 up and down, the height of the positioning seat 21 can be adjusted to meet different operating requirements.

[0036] The top surface of the positioning seat 21 has a mounting groove 211 that matches the cylindrical battery. The mounting groove 211 is used to place and fix the cylindrical battery to ensure the stability of the battery during welding. The top surface of the positioning seat 21 is also provided with a positioning groove 212 for installing a positioning bar. The positioning groove 212 is connected to the mounting groove 211. The positioning groove 212 is used to place and position the bar so that the bar is accurately docked to the battery area to be welded.

[0037] The clamping assembly 3 is used to cooperate with the positioning assembly 2 to realize the clamping of the cylindrical battery and the tab, so as to realize the welding operation of the tab and the cylindrical battery through the clamping assembly 3. In this embodiment, the clamping assembly 3 includes a clamping member 31 and a translation device 32. The clamping member 31 is located above the positioning seat 21 and can move horizontally relative to the bottom plate 1. The clamping member 31 is provided with a welding through hole 310 to ensure that the welding equipment can realize the welding operation of the tab and the cylindrical battery welding area through the welding through hole 310. The translation device 32 is set on the bottom plate 1, and is used to drive the clamping member 31 to move horizontally so that the welding through hole 310 corresponds to the welding area of ​​the tab and the cylindrical battery in the height direction.

[0038] With the above technical solution, after the cylindrical battery is positioned in the mounting groove 211 on the top surface of the positioning seat 21, the metal bar is placed in the positioning groove 212 so that it docks with the welding area of ​​the cylindrical battery. The pressing member 31 is driven horizontally to the top of the positioning seat 21 by the translation device 32 to ensure that the welding through hole 310 precisely corresponds to the welding area of ​​the bar and the battery pole in the height direction. The positioning seat 21 is driven upward by the lifting device 22. The upward movement of the positioning seat 21 causes the pressing member 31 to press the battery and the bar to ensure that they remain stable and in close contact during the welding process. The welding through hole 310 can realize the welding operation between the bar and the welding area of ​​the cylindrical battery. When the welding operation is completed, the lifting device 22 drives the positioning seat 21 to move downward and reset, and the translation device 32 drives the pressing member 31 to move away, so as to facilitate the removal of the welded cylindrical battery and bar.

[0039] The cylindrical battery bar welding tool disclosed in the utility model, through the setting of the lifting device 22 and the translation device 32, allows the positioning seat 21 and the pressing member 31 to be easily moved up and down and horizontally, reducing the steps of manual adjustment and fixing, and improving the convenience of operation. Compared with the prior art that requires manual disassembly and assembly of the cover plate 311, the utility model realizes the automatic pressing and positioning of the pressing member 31 through the mechanical lifting and translation device 32, reducing the time of assembly and disassembly, and significantly improving the welding efficiency.

[0040] As some preferred embodiments, the positioning groove 212 includes a first positioning groove 2121 and a second positioning groove 2122. The first positioning groove 2121 and the second positioning groove 2122 are located on both sides of the mounting groove 211 in the radial direction. The depth of the first positioning groove 2121 is less than the depth of the second positioning groove 2122. The first positioning groove 2121 is used to place the first bar B1 connected to the pole, and the second positioning groove 2122 is used to place the second bar B2 connected to the top surface of the battery shell.

[0041] With the above solution, the first positioning groove 2121 is used to place the tab connected to the battery pole, and its depth is shallow, which can ensure that the tab is in close contact with the pole during welding. The second positioning groove 2122 is used to place the tab connected to the top surface of the battery shell, and its depth is deep, which can ensure the stable connection between the tab and the top surface of the shell. By designing two positioning grooves 212 of different depths on both sides of the radial direction of the mounting groove 211, different types of tabs can be positioned more accurately to ensure that they are accurately docked with the corresponding battery parts, thereby improving the accuracy and quality of welding.

[0042] On the basis of the above technical solution, a first positioning pin D1 is fixedly arranged in each of the first positioning groove 2121 and the second positioning groove 2122. With such a structural arrangement, each positioning groove 212 has a fixed positioning pin for accurately locating and fixing the position of the bar piece, ensuring that there will be no movement or offset during the welding process, thereby improving the stability and reliability of the welding process. In addition, by fixing the first positioning pin D1, the bar piece can be quickly and accurately placed in the correct welding position, thereby improving production efficiency and work efficiency.

[0043] In this embodiment, the clamping member 31 includes a cover plate 311 and support seats 312 fixed at both ends of the cover plate 311 in the length direction. The entire clamping member 31 is a door-shaped structure. The translation device 32 is used to drive the support seat 312 to move horizontally on the base plate 1 along a second direction. The first direction and the second direction are perpendicular. The first direction is the connecting direction of the first positioning groove 2121 and the second positioning groove 2122. The spacing between the two support seats 312 is greater than the width of the positioning seat 21 along the first direction. According to this arrangement, the clamping member 31 can cover the outside of the positioning seat 21 during the translation process, and at the same time ensure that the cover plate 311 can completely cover the battery and the tab on the positioning seat 21. The cover plate 311 is located on the top surface of the positioning seat 21, and the welding through hole 310 is set on the cover plate 311. When the cover plate 311 moves to the top of the positioning seat 21, the welding through hole 310 on the cover plate 311 ensures that the welding equipment can be accurately positioned in the welding area, thereby avoiding the deviation of the welding position and improving the welding quality and stability.

[0044] Since both the positive and negative terminals of the cylindrical battery need to be welded with tabs, in this embodiment, the first tab B1 is located in the first positioning groove 2121, and the first tab B1 is connected to the battery pole, and the second tab B2 is located in the second positioning groove 2122, and is connected to the top surface of the battery shell. In this embodiment, the battery pole is defined as the positive pole, and the battery shell is the negative pole. In order to realize the welding of the two tabs to the corresponding positions of the battery, the welding through hole 310 of this embodiment includes a first welding through hole 3101 and a second welding through hole 3102 set along the first direction, the first welding through hole 3101 is coaxial with the mounting groove 211, and the second welding through hole 3102 is located on one side of the first welding through hole 3101, and the second welding through hole 3102 is used to correspond to the side of the top surface of the battery shell facing the first positioning groove 2121. With this arrangement, the first tab B1 and the positive electrode of the battery can be welded through the first welding through hole 3101 , and the second tab B2 and the top surface (negative terminal) of the battery shell can be welded through the second welding through hole 3102 .

[0045] In this embodiment, the thickness of the first tab B1 is smaller than the depth of the first positioning groove 2121, and the thickness of the second tab B2 is smaller than the depth of the second positioning groove 2122. Therefore, when the cover plate 311 is directly above the positioning seat 21, the lifting device 22 drives the positioning seat 21 to move upward, so that the top surface of the positioning seat 21 contacts the bottom surface of the cover plate 311. However, in this way, the cover plate 311 cannot directly press the tab and the battery welding position.

[0046] To this end, the solution adopted in this embodiment is: the bottom panel of the cover plate 311 is provided with a first boss 313 and a second boss 314, the first boss 313 is arranged around the first welding through hole 3101, the second boss 314 is arranged around the second welding through hole 3102, and the height of the first boss 313 is smaller than that of the second boss 314.

[0047] By adopting the above technical solution, the design of bosses of different heights helps to adapt to the different heights and shapes of the battery and the tab surface, ensuring the stability and compression effect of the cover plate 311 during welding. The tab and the battery welding position are compressed by the boss, so that the corresponding tab and battery welding position can be welded through the boss.

[0048] Preferably, at least one second positioning pin D2 is further provided on the top surface of the positioning seat 21, and a positioning hole 315 matching with the second positioning pin D2 is provided on the cover plate 311. With this arrangement, when the positioning seat 21 moves upward, the second positioning pin D2 on the top surface of the positioning seat 21 can pass through the positioning hole 315 on the cover plate 311, thereby realizing horizontal positioning between the cover plate 311 and the positioning seat 21, avoiding horizontal displacement of the cover plate 311 and the positioning seat 21 during welding, and ensuring the accuracy and stability of the welding position between the battery sheet and the battery.

[0049] In order to realize the up and down movement of the positioning seat 21, a support frame 4 is fixedly arranged directly below the base plate 1 in this embodiment, and the base plate 1 is supported and fixed by the support frame 4. In this way, the lifting device 22 can be placed between the base plate 1 and the support frame 4, avoiding the lifting device 22 being directly arranged above the base plate 1 and occupying a large space.

[0050] Specifically, the lifting device 22 includes a lifting cylinder 221 and a fixing part 222. A through hole 11 is opened on the base plate 1. The fixing part 222 is arranged in the through hole 11. The positioning seat 21 is detachably fixed on the fixing part 222. The lifting cylinder 221 is fixedly arranged below the base plate 1. The telescopic end of the lifting cylinder 221 vertically passes through the through hole 11 upward and is fixedly connected to the fixing part 222.

[0051] With this arrangement, the lifting cylinder 221 can be used to drive the positioning seat 21 to rise or fall above the bottom plate 1. The setting of the through hole 11 facilitates the fixing member 222 to move up and down in the through hole 11, and also facilitates the telescopic end of the lifting cylinder 221 to rise or fall in the through hole 11. In this embodiment, the opening of the through hole 11 is smaller than the cross-sectional area of ​​the positioning seat 21. In this way, the positioning seat 21 can only move up and down above the base. When the positioning seat 21 is reset downward, it can be positioned by the bottom plate 1. In this embodiment, through the setting of the fixing member 222, different positioning seats 21 can be easily replaced to adapt to different cylindrical battery and bar welding operations.

[0052] In this embodiment, the translation device 32 includes a translation cylinder 321, a slide rail 322 and a slider 323. Two slide rails 322 are arranged in parallel. The two slide rails 322 are fixedly arranged on the bottom plate 1 on both sides of the positioning seat 21 along the first direction. The support seat 312 is slidably connected to the slide rail 322 through the slider 323. The fixed end of the translation cylinder 321 is fixedly arranged on the bottom plate 1. The telescopic end of the translation cylinder 321 is fixedly connected to the support seat 312, and the telescopic end of the translation cylinder 321 is parallel to the length direction of the slide rail 322. The translation cylinder 321 drives the support seat 312 to slide along the slide rail 322, so that the clamping member 31 can be moved along the slide rail 322 in the second direction, thereby realizing the movement of the cover plate 311 to the top of the positioning seat 21. In this embodiment, when it is necessary to adapt to the welding of different cylindrical batteries, in addition to replacing the positioning seat 21, the clamping member 31 can also be replaced.

[0053] In order to facilitate the removal of the cylindrical battery after welding, in this embodiment, a avoidance groove 213 connected to the mounting groove 211 is opened on the top surface of the positioning seat 21. The avoidance groove 213 is preferably arranged in the second direction of the positioning seat 21.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cylindrical battery bar welding tool, characterized in that: include: Bottom plate (1); The positioning assembly (2) comprises a positioning seat (21) and a lifting device (22), wherein the positioning seat (21) is arranged above the bottom plate (1), the top surface of the positioning seat (21) has a mounting groove (211) matching the cylindrical battery, the top surface of the positioning seat (21) is also provided with a positioning groove (212) for mounting a positioning bar, the positioning groove (212) is connected to the mounting groove (211), and the lifting device (22) is arranged below the bottom plate (1) and is used to drive the positioning seat (21) to move up and down; The clamping assembly (3) comprises a clamping member (31) and a translation device (32). The clamping member (31) is located above the positioning seat (21) and can move horizontally relative to the bottom plate (1). A welding through hole (310) is provided on the clamping member (31). The translation device (32) is arranged on the bottom plate (1) and is used to drive the clamping member (31) to move horizontally so that the welding through hole (310) corresponds to the welding area of ​​the tab and the cylindrical battery in the height direction.

2. The cylindrical battery bar welding tool as claimed in claim 1, characterized in that: The positioning groove (212) comprises a first positioning groove (2121) and a second positioning groove (2122), the first positioning groove (2121) and the second positioning groove (2122) being located on both sides of the mounting groove (211) in a radial direction, the depth of the first positioning groove (2121) being smaller than the depth of the second positioning groove (2122), the first positioning groove (2121) being used for accommodating a first tab (B1) connected to the pole, and the second positioning groove (2122) being used for accommodating a second tab (B2) connected to the top surface of the battery housing.

3. The cylindrical battery tab welding tool as claimed in claim 2, characterized in that: A first positioning pin (D1) is fixedly disposed in each of the first positioning groove (2121) and the second positioning groove (2122).

4. The cylindrical battery bar welding tool as claimed in claim 2, characterized in that: The pressing member (31) comprises a cover plate (311) and support seats (312) fixedly located at both ends of the cover plate (311) in the length direction, the spacing between the two support seats (312) is greater than the width of the positioning seat (21) along the first direction, the translation device (32) is used to drive the support seat (312) to move horizontally on the bottom plate (1) along the second direction, the first direction and the second direction are perpendicular, the first direction is the direction of the connection between the first positioning groove (2121) and the second positioning groove (2122), the cover plate (311) is located on the top surface of the positioning seat (21), and the welding through hole (310) is arranged on the cover plate (311).

5. The cylindrical battery tab welding tool as claimed in claim 4, characterized in that: The welding through hole (310) comprises a first welding through hole (3101) and a second welding through hole (3102) arranged along a first direction, wherein the first welding through hole (3101) is coaxial with the mounting groove (211), the second welding through hole (3102) is located on one side of the first welding through hole (3101), and the second welding through hole (3102) is used to correspond to a side of the top surface of the battery housing facing the first positioning groove (2121).

6. The cylindrical battery tab welding tool as claimed in claim 5, characterized in that: The bottom panel of the cover plate (311) is provided with a first boss (313) and a second boss (314), wherein the first boss (313) is arranged around the first welding through hole (3101), and the second boss (314) is arranged around the second welding through hole (3102), and the height of the first boss (313) is smaller than that of the second boss (314).

7. The cylindrical battery tab welding tool as claimed in claim 4, characterized in that: The top surface of the positioning seat (21) is also provided with at least one second positioning pin (D2), and the cover plate (311) is provided with a positioning hole (315) matching with the second positioning pin (D2).

8. The cylindrical battery bar welding tool as claimed in claim 1, characterized in that: The invention also comprises a support frame (4), wherein the support frame (4) is fixedly arranged directly below the base plate (1); the lifting device (22) comprises a lifting cylinder (221) and a fixing member (222); a through hole (11) is opened on the base plate (1); the fixing member (222) is arranged in the through hole (11); the positioning seat (21) is detachably fixedly arranged on the fixing member (222); the lifting cylinder (221) is fixedly arranged below the base plate (1); and the telescopic end of the lifting cylinder (221) vertically passes through the through hole (11) and is fixedly connected to the fixing member (222).

9. The cylindrical battery tab welding tool as claimed in claim 4, characterized in that: The translation device (32) comprises a translation cylinder (321), a slide rail (322) and a slider (323). Two slide rails (322) are arranged in parallel. The two slide rails (322) are fixedly arranged on the bottom plate (1) at both sides of the positioning seat (21) along a first direction. The support seat (312) is slidably connected to the slide rails (322) via the slider (323). The fixed end of the translation cylinder (321) is fixedly arranged on the bottom plate (1). The telescopic end of the translation cylinder (321) is fixedly connected to the support seat (312), and the telescopic end of the translation cylinder (321) is parallel to the length direction of the slide rail (322).

10. The cylindrical battery tab welding tool as claimed in claim 1, characterized in that: The top surface of the positioning seat (21) is provided with an avoidance groove (213) which is in communication with the installation groove (211).

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