Rotary clamp for battery welding

Abstract

The utility model provides a rotary fixture for battery welding, which is mounted on a base station and comprises a rotary platform, the outer ring of the rotary platform is fixedly mounted on the base station, the inner ring of the rotary platform is rotatably connected with the outer ring, the inner ring is provided with a mover part, the mover part is provided with an accommodating hole for accommodating a battery, and the accommodating hole is used for accommodating the battery. The rotor part is provided with a pressing plate for clamping a battery, at least part of the pressing plate is internally provided with a first cooling air channel, the rotor part is provided with an air pipe mounting frame, the air pipe mounting frame is provided with a first butt joint surface, the first butt joint surface is provided with a first air hole, and the first air hole is communicated to the first cooling air channel. According to the utility model, the first cooling air channel is arranged in the pressing plate of the rotary clamp, and the pressing plate is quickly cooled by introducing air into the first cooling air channel, so that the precision and the clamping quality of the rotary clamp are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a rotary fixture for battery welding. Background Art

[0002] The housing and the top cover of a blade battery are connected by laser welding. In the existing process, the two are pre-welded first and then fully welded. In order to improve the welding efficiency, a rotary fixture is used in cooperation with a laser welding device for welding work. However, a large amount of heat is generated during the laser welding process, and this heat will be transferred to the rotary fixture through the battery. If the heat cannot be dissipated in time and effectively, it will affect the accuracy and clamping quality of the rotary fixture. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a rotary fixture for battery welding, which can effectively dissipate heat and ensure the accuracy and clamping quality of the rotary fixture.

[0004] The embodiments of the utility model are realized through the following technical solutions:

[0005] A rotary fixture for battery welding is installed on a base, and includes a rotary platform. The outer ring of the rotary platform is fixedly installed on the base, the inner ring of the rotary platform is rotatably connected to the outer ring, a rotor part is arranged on the inner ring, a receiving hole for receiving a battery is arranged on the rotor part, a pressing plate for clamping the battery is arranged on the rotor part, at least part of the pressing plate is internally provided with a first cooling air duct, an air pipe mounting bracket is arranged on the rotor part, a first docking surface is configured on the air pipe mounting bracket, and a first air hole is arranged on the first docking surface, and the first air hole communicates with the first cooling air duct.

[0006] According to a preferred embodiment, an air-cooling assembly is further included and arranged on one side of the rotary platform. The air-cooling assembly includes an air pipe push plate, an air-cooling joint corresponding to the first air hole is arranged on the air pipe push plate, and the air pipe push plate can approach or move away from the first docking surface so that the air-cooling joint communicates with or disconnects the first air hole; the air-cooling joint communicates with a compressed air source.

[0007] According to a preferred embodiment, the pressing plate includes a first moving plate and a second moving plate movably connected to the rotor part. The moving direction of the first moving plate relative to the rotor part is perpendicular to the moving direction of the second moving plate relative to the rotor part; a first fixed plate corresponding to the first moving plate and a second fixed plate corresponding to the second moving plate are arranged on the rotor part; the area formed by the limiting of the first moving plate, the first fixed plate, the second moving plate and the second fixed plate coincides with the receiving hole; at least one of the first moving plate, the first fixed plate, the second moving plate and the second fixed plate is internally provided with the first cooling air duct.

[0008] According to a preferred embodiment, the rotary jig for battery welding further includes an unlocking portion and an actuating portion. The first movable plate and the second movable plate are movably connected to the rotor portion through the actuating portion. The unlocking portion is used to cooperate with the actuating portion to move the first movable plate away from the first fixed plate and the second movable plate away from the second fixed plate to unlock the battery. The actuating portion is disposed on the rotor portion, and the unlocking portion is disposed on the outer ring or the base and is on the rotation path when the actuating portion follows the rotation of the rotor portion.

[0009] According to a preferred embodiment, the actuating portion includes a first push plate slidably connected to the rotor portion for assembling the first movable plate and the second movable plate. The actuating portion further includes a reset stopper disposed on the rotor portion. A reset member is disposed between the reset stopper and the first push plate, and the reset member acts on the first push plate to make it have a movement tendency toward the center of the accommodation hole.

[0010] According to a preferred embodiment, the unlocking portion includes a first hooking portion, and a second hooking portion is disposed on the first push plate. When the rotor portion rotates relative to the outer ring to the unlocking position, the first hooking portion can be hooked with the second hooking portion to drive the first push plate so that it can move in a direction away from the center of the accommodation hole.

[0011] According to a preferred embodiment, the rotor portion includes a first rotating disk and a second rotating disk arranged at intervals. The first rotating disk and the second rotating disk are connected by a rotating block. The accommodation hole sequentially penetrates through the first rotating disk, the rotating block, and the second rotating disk. The pressing plate is disposed on the first rotating disk. Avoidance grooves are provided on the side walls of the accommodation hole on the second rotating disk and the rotating block, and the width of the avoidance grooves is smaller than the width of the battery.

[0012] According to a preferred embodiment, a first bearing surface for placing the battery is configured on the inner wall of the accommodation hole, and the first bearing surface is distributed on at least one side of the avoidance groove.

[0013] According to a preferred embodiment, an auxiliary plate is provided on the second rotating disk, and the auxiliary plate is used to press the battery on one side of the second rotating disk.

[0014] According to a preferred embodiment, a second air hole is provided through the air pipe push plate, and the second air hole is arranged corresponding to the first air hole. The air cooling joint is installed at one end of the second air hole away from the air pipe mounting bracket, and a silica gel sleeve is provided at one end of the second air hole close to the air pipe mounting bracket.

[0015] The technical solution of the embodiment of the present utility model has at least the following advantages and beneficial effects:

[0016] In the present utility model, a first cooling air passage is arranged in the pressing plate of the rotary fixture, and the pressing plate is rapidly cooled by introducing gas into the first cooling air passage, ensuring the accuracy and clamping quality of the rotary fixture; moreover, the gas source inlet for cooling the pressing plate, that is, the first air hole, is centrally arranged on the air pipe mounting rack, which can improve the integration degree of the rotary fixture, avoid the winding of air pipes while realizing the air cooling of the pressing plate, and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present utility model, the drawings required to be used in the embodiment will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a three-dimensional structure diagram of the rotary fixture for battery welding provided by the embodiment of the present utility model assembled to the base;

[0019] Figure 2 It is a rear view structure diagram of the rotary fixture for battery welding provided by the embodiment of the present utility model assembled to the base;

[0020] Figure 3 It is a three-dimensional structure diagram of the rotor part assembled to the rotary platform provided by the embodiment of the present utility model;

[0021] Figure 4 It is a first three-dimensional structure diagram of the rotor part provided by the present utility model;

[0022] Figure 5 It is an exploded structure diagram of the moving part provided by the present utility model;

[0023] Figure 6 It is a second three-dimensional structure diagram of the rotor part provided by the present utility model.

[0024] Icons: 1. Battery; 20. Base station; 201. Longitudinal platform; 202. Bottom platform; 21. Air pipe mounting bracket; 211. First air pipe joint; 220. Accommodating hole; 221. Outer ring; 222. Inner ring; 223. First rotating disk; 224. Second rotating disk; 225. Rotating block; 22501. Block body; 22502. Connecting square frame; 2251. Avoidance groove; 2252. First bearing surface; 226. Pressure plate; 2261. First moving plate; 2262. Second moving plate; 2263. First fixed plate; 2264. Second fixed plate; 227. Unlocking part; 2271. First telescopic part; 2272. First hooking part; 228. Actuating part; 2281. First pushing plate; 22811. Accommodating notch; 2282. Reset stop block; 2283. Stabilizing rod; 2284. Reset part; 2285. Fixed screw hole; 2286. Second hooking part; 229. Second air pipe joint; 2210. First auxiliary moving plate; 2211. Second auxiliary moving plate; 2212. First auxiliary fixed plate; 2213. Second auxiliary fixed plate; 23. Air cooling component; 231. Second telescopic part; 232. Air pipe pushing plate; 2321. Air cooling joint; 2322. Silicone sleeve; 2323. Second docking surface; X. First direction; Y. Second direction; Z. Third direction. Detailed implementation manners

[0025] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] Please refer to Figures 1 to 6, A rotary fixture for battery welding, installed on a base 20, includes a rotary platform. The outer ring 221 of the rotary platform is fixedly installed on the base 20, and the inner ring 222 of the rotary platform is rotatably connected to the outer ring 221. A mover part is provided on the inner ring 222. A receiving hole 220 for accommodating the battery 1 is provided on the mover part. A pressing plate 226 for clamping the battery 1 is provided on the mover part. At least part of the pressing plate 226 is internally provided with a first cooling air passage (not shown in the figure). An air pipe mounting bracket 21 is provided on the mover part. A first docking surface (not shown in the figure) is configured on the air pipe mounting bracket 21. A first air hole (not shown in the figure) is provided on the first docking surface, and the first air hole communicates with the first cooling air passage. Here, by centrally arranging the air source inlet of the cooling pressing plate 226, that is, the first air hole, on the air pipe mounting bracket 21, the integration degree of the rotary fixture can be improved. While realizing the air cooling of the pressing plate 226, the air pipe winding can be avoided, and the safety is high. An exhaust hole (not shown in the figure) is provided on the pressing plate 226 provided with the first cooling air passage, and the exhaust hole communicates with the first cooling air passage. After the compressed air enters the first cooling air passage, it escapes from the pressing plate 226 through the exhaust hole and takes away heat.

[0029] The rotary fixture further includes an air cooling assembly 23. The air cooling assembly 23 is arranged on one side of the rotary fixture and includes an air pipe push plate 232. An air cooling joint 2321 corresponding to the first air hole is provided on the air pipe push plate 232. The air pipe push plate 232 can approach or move away from the first docking surface so that the air cooling joint 2321 communicates or disconnects the first air hole; the air cooling joint 2321 communicates with a compressed air source (not shown in the figure).

[0030] As Figure 1 shown, the base 20 includes a bottom base 202 and a longitudinal base 201. The longitudinal base 201 is arranged on the bottom base 202. The rotary fixture is installed on the longitudinal base 201, and the air cooling assembly 23 is arranged on the bottom base 202.

[0031] After the battery 1 welding work is completed, the rotary fixture resets and releases the battery 1, and the battery 1 is unloaded. The air pipe push plate 232 moves towards the first docking surface so that the air cooling joint 2321 connects the first air hole to convey the cooling gas in the compressed air source into the first cooling air passage to cool down the pressing plate 226, so as to ensure the function of the rotary fixture and the processing quality of the battery 1. In this embodiment, as Figure 1As shown, a first air pipe joint 211 is provided on the air pipe mounting bracket 21, and a second air pipe joint 229 is provided on the pressing plate 226. The first air pipe joint 211 is installed at one end of the first air hole away from the air cooling assembly 23, and the first air pipe joint 211 and the second air pipe joint 229 are connected by an air guide pipe (not shown in the figure). Here, by integrating multiple first air holes on the air pipe mounting bracket 21 to cooperate with the air cooling assembly 23, specifically the air pipe push plate 232, to achieve the rapid connection and disconnection of the compressed air source and the first cooling air passage, it can meet the air cooling requirement of the pressing plate 226 under the processing condition of the circumferential rotation of the rotary fixture, and at the same time avoid affecting the smooth operation of the rotary fixture due to the winding of the air guide pipe.

[0032] As Figure 1 shown, in this embodiment, the first docking surface is a plane, and a second docking surface 2323 is provided on the side of the air pipe push plate 232 facing the first docking surface. When in the position as Figure 1 shown, the first docking surface is parallel to the second docking surface 2323. Specifically, as Figure 1 shown, a second air hole (not shown in the figure) is provided through the air pipe push plate 232. The second air holes correspond to the first air holes one by one. The air cooling joint 2321 is installed at one end of the second air hole away from the air pipe mounting bracket 21, and a silica gel sleeve 2322 is provided at one end of the second air hole close to the air pipe mounting bracket 21. In this embodiment, a second telescopic member 231 is provided on the base 202 to drive the air pipe push plate 232 to approach or move away from the air pipe mounting bracket 21, so that the second air hole and the first air hole are connected or disconnected. As Figure 1 shown, during use, after the welded battery 1 is unloaded, the second telescopic member 231 extends to drive the air pipe push plate 232 installed at the telescopic end of the second telescopic member 231 to move towards the air pipe mounting bracket 21 until the silica gel sleeve 2322 abuts against the first docking surface to connect the second air hole and the first air hole. The silica gel sleeve 2322 is deformed under pressure so that the connection between the second air hole and the first air hole can be better sealed, greatly reducing the probability of air leakage at the connection between the second air hole and the first air hole.

[0033] As Figure 1As shown in the figure, the pressing plate 226 includes a first moving plate 2261 and a second moving plate 2262 that are movably connected to the mover part. The moving direction of the first moving plate 2261 relative to the mover part is perpendicular to the moving direction of the second moving plate 2262 relative to the mover part. A first fixed plate 2263 corresponding to the first moving plate 2261 and a second fixed plate 2264 corresponding to the second moving plate 2262 are provided on the mover part. The area limited by the first moving plate 2261, the first fixed plate 2263, the second moving plate 2262, and the second fixed plate 2264 coincides with the accommodation hole 220. At least one of the first moving plate 2261, the first fixed plate 2263, the second moving plate 2262, and the second fixed plate 2264 is internally provided with a first cooling air duct. In this embodiment, the battery 1 is a blade battery. The first moving plate 2261 and the first fixed plate 2263 are located on the long side of the top cover of the battery 1, and the second moving plate 2262 and the second fixed plate 2264 are located on the short side of the top cover of the battery 1. Optionally, since the contact area between the first moving plate 2261 and the first fixed plate 2263 and the battery 1 is large, and they are greatly affected by the heat transfer of battery 1 welding, a first cooling air duct is provided in the first moving plate 2261 and the first fixed plate 2263. In another embodiment, a second cooling air duct can also be provided in the second moving plate 2262 and the second fixed plate 2264. The first fixed plate 2263 and the second fixed plate 2264 here serve as positioning references, and cooperate with the first moving plate 2261 and the second moving plate 2262 to position the battery 1 in the first direction X and the second direction Y. The transfer assembly cooperates with the positioning mechanism to position the battery 1 in the third direction Z, so as to realize the spatial positioning and clamping of the battery 1.

[0034] As Figure 1 shown in the figure, the rotary fixture further includes an unlocking part 227 and an actuating part 228. The first moving plate 2261 and the second moving plate 2262 are movably connected to the mover part through the actuating part 228. The unlocking part 227 is used to cooperate with the actuating part 228 to move the first moving plate 2261 away from the first fixed plate 2263 and the second moving plate 2262 away from the second fixed plate 2264 to unlock the battery 1. The actuating part 228 is arranged on the mover part, and the unlocking part 227 is arranged on the outer ring 221 or the base 20 and is on the rotation path when the actuating part 228 follows the mover part to rotate. Both the unlocking part 227 and the actuating part 228 are two, and are respectively arranged corresponding to the first moving plate 2261 and the second moving plate 2262. When in the state as Figure 1 shown in the figure, it is the state of loading and unloading the battery 1 at the rotary fixture. At this time, the unlocking part 227 and the actuating part 228 correspond, that is, the rotary fixture is in the unlocked position. Preferably, the unlocking part 227 is arranged on the base 20.

[0035] As Figure 5As shown, the actuating part 228 includes a first push plate 2281 slidably connected to the mover part, which is used to assemble the first movable plate 2261 and the second movable plate 2262; the actuating part 228 further includes a reset stopper 2282 arranged on the mover part, and a reset member 2284 is arranged between the reset stopper 2282 and the first push plate 2281. The reset member 2284 acts on the first push plate 2281 to make it have a tendency to move towards the center of the receiving hole 220. Preferably, the reset member 2284 is a spring, which is pressed between the reset stopper 2282 and the first push plate 2281, providing the first push plate 2281 with a tendency to move towards the center of the receiving hole 220, thereby driving the first pressing plate 226 to move towards the first fixed plate 2263, and at the same time driving the second movable plate 2262 to move towards the second fixed plate 2264, so as to achieve flexible clamping of the battery 1, avoid damage to the battery 1, and at the same time be able to adapt to the clamping of different models of the battery 1.

[0036] In this embodiment, in order to facilitate the assembly of the spring, a stabilizing rod 2283 is penetrated through the reset stopper 2282, and a fixing screw hole 2285 is arranged on the first push plate 2281. The stabilizing rod 2283 is fixedly installed in the fixing screw hole 2285; the spring is sleeved outside the stabilizing rod 2283.

[0037] In this embodiment, a receiving notch 22811 is arranged on the first push plate 2281. The opening end of the receiving notch 22811 faces the reset stopper 2282. The stabilizing rod 2283 is arranged at the bottom of the receiving notch 22811, and the spring is located in the receiving notch 22811. Here, the receiving notch 22811 can increase the movement distance of the first push plate 2281 in the first direction X and the second direction Y, so as to accommodate different models of the battery 1 in the space limited by the first movable plate 2261, the second movable plate 2262, the first fixed plate 2263 and the second fixed plate 2264.

[0038] As Figure 5 shown, the first push plate 2281 is slidably connected to the mover part through a slide rail and slider assembly.

[0039] In another embodiment, the reset member 2284 can also be a shrapnel arranged between the first push plate 2281 and the reset stopper 2282, or other forms of the reset member 2284, as long as it can provide a force for the first push plate 2281 to move towards the center direction of the receiving hole 220.

[0040] As Figure 1 and Figure 3As shown, the unlocking portion 227 includes a first hooking portion 2272. A second hooking portion 2286 is provided on the first push plate 2281. When the mover portion rotates relative to the outer ring 221 to the unlocking position, that is, when the rotary jig is in the unlocking position, the first hooking portion 2272 can be hooked with the second hooking portion 2286 to drive the first push plate 2281 so that it can move in a direction away from the center of the receiving hole 220. In this embodiment, a first telescopic member 2271 is provided on the base 20, and the telescopic end of the first telescopic member 2271 is provided with the first hooking portion 2272. When unlocking is required, the first telescopic member 2271 drives the first hooking portion 2272 to abut against and hook to the second hooking portion 2286, and the second telescopic member 231 continues to act so that the second hooking portion 2286, that is, the first push plate 2281, moves in a direction away from the center of the receiving hole 220 to unlock the battery 1. Similarly, when it is necessary to lock the battery 1, the first telescopic member 2271 drives the first hooking portion 2272 to move in a direction close to the center of the receiving hole 220, and the first push plate 2281 moves in a direction close to the center of the receiving hole 220 under the action of the reset member 2284 so that the first moving plate 2261 moves toward the first fixed plate 2263 and the second moving plate 2262 moves toward the second fixed plate 2264.

[0041] As Figures 1 to 4 and Figure 6 shown, the mover portion includes a first rotating disk 223 and a second rotating disk 224 which are arranged at intervals. The two first rotating disks 223 and the second rotating disk 224 are connected by a rotating block 225. The receiving hole 220 sequentially penetrates through the first rotating disk 223, the rotating block 225, and the second rotating disk 224; the first rotating disk 223 is arranged close to the positioning mechanism side, and the second rotating disk 224 is arranged close to the transfer assembly side. The pressing plate 226 is arranged on the first rotating disk 223; avoiding grooves 2251 are provided on the side walls of the receiving hole 220 on the second rotating disk 224 and the rotating block 225. The transfer assembly can extend into the avoiding grooves 2251, and the width of the avoiding grooves 2251 is smaller than the width of the battery 1. A first bearing surface 2252 for placing the battery 1 is configured on the inner wall of the receiving hole 220, and the first bearing surface 2252 is distributed on at least one side of the avoiding grooves 2251. In this embodiment, the first rotating disk 223 is fixedly installed on the inner ring 222 of the rotating platform. When the inner ring 222 rotates relative to the outer ring 221, the mover portion can follow the inner ring 222 to rotate relative to the outer ring 221. The avoiding grooves 2251 here are used to accommodate the transfer assembly, so that the battery 1 on the transfer assembly can be separated from the transfer assembly in the receiving hole 220 and placed on the first bearing surface 2252, so as to facilitate the placement of the battery 1 before positioning on the rotary jig.

[0042] As Figure 4 and Figure 6As shown, in some embodiments, the rotating block 225 includes a block body 22501 and a connecting square frame 22502. The first rotating disk 223 and the second rotating disk 224 are connected through the connecting square frame 22502. The block body 22501 is installed on the square frame, and the avoidance groove 2251 and the first bearing surface 2252 are both provided on the block body 22501.

[0043] As Figure 2 and Figure 3 As shown, an auxiliary plate is provided on the second rotating disk 224, and the auxiliary plate is used to press the battery 1 on one side of the second rotating disk 224. In this embodiment, the auxiliary plate includes a first auxiliary moving plate 2210, a first auxiliary fixed plate 2212, a second auxiliary moving plate 2211 and a second auxiliary fixed plate 2213, which are correspondingly arranged with the first moving plate 2261, the first fixed plate 2263, the second moving plate 2262 and the second fixed plate 2264, and their working principles are the same, so they will not be elaborated here. Since the blade battery is long, the auxiliary plate on the second rotating disk 224 can cooperate with the pressing plate 226 on the first rotating disk 223 to improve the stability of the rotation fixture for fixing the battery 1.

[0044] It should be noted that both the first auxiliary moving plate 2210 and the second auxiliary moving plate 2211 are movably assembled with the second rotating disk 224 through the aforementioned moving part 228, and are unlocked through the unlocking part 227 installed on the base 20.

[0045] It should be noted that, in some embodiments, for the specific structure and installation layout of the moving part 228, specifically the first push plate 2281 and the reset stopper 2282, adaptive adjustments can be made according to factors such as the implementation structure space, as long as the function claimed in this embodiment can be achieved.

[0046] In this embodiment, the first telescopic member 2271 and the second telescopic member 231 include, but are not limited to, air cylinders or electric push rods.

[0047] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A battery welding rotating fixture, mounted on a base (20), characterized in that: The invention comprises a rotating platform, wherein the outer ring (221) of the rotating platform is fixedly mounted on the base (20), the inner ring (222) of the rotating platform is rotatably connected to the outer ring (221), the inner ring (222) is provided with a movable part, the movable part is provided with a receiving hole (220) for receiving a battery (1), the movable part is provided with a pressure plate (226) for clamping the battery (1), at least part of the pressure plate (226) is provided with a first cooling air duct, the movable part is provided with an air pipe mounting frame (21), the air pipe mounting frame (21) is provided with a first docking surface, the first docking surface is provided with a first air hole, and the first air hole is connected to the first cooling air duct.

2. The battery welding rotating fixture according to claim 1, characterized in that: It also includes an air cooling component (23) arranged on one side of the rotating platform, the air cooling component (23) includes an air pipe push plate (232), an air cooling joint (2321) corresponding to the first air hole is arranged on the air pipe push plate (232), and the air pipe push plate (232) can be close to or away from the first docking surface so that the air cooling joint (2321) is connected to or disconnected from the first air hole; The air cooling joint (2321) is connected to a compressed air source.

3. The battery welding rotating fixture according to claim 1, characterized in that: The pressing plate (226) comprises a first movable plate (2261) and a second movable plate (2262) movably connected to the movable part, wherein a movement direction of the first movable plate (2261) relative to the movable part is perpendicular to a movement direction of the second movable plate (2262) relative to the movable part; The movable part is provided with a first fixed plate (2263) corresponding to the first movable plate (2261), and a second fixed plate (2264) corresponding to the second movable plate (2262); The area formed by the first movable plate (2261), the first fixed plate (2263), the second movable plate (2262) and the second fixed plate (2264) is overlapped with the accommodating hole (220); At least one of the first movable plate (2261), the first fixed plate (2263), the second movable plate (2262) and the second fixed plate (2264) has the first cooling air duct built in.

4. The battery welding rotating fixture according to claim 3, characterized in that: The battery welding rotating fixture further comprises an unlocking portion (227) and an action portion (228); the first movable plate (2261) and the second movable plate (2262) are movably connected to the movable portion via the action portion (228); the unlocking portion (227) is used to cooperate with the action portion (228) to move the first movable plate (2261) away from the first fixed plate (2263) and the second movable plate (2262) away from the second fixed plate (2264) to unlock the battery (1); The action part (228) is arranged on the movable part, and the unlocking part (227) is arranged on the outer ring (221) or the base (20), and is located on a rotation path when the action part (228) rotates following the movable part.

5. The battery welding rotating fixture according to claim 4, characterized in that: The action part (228) comprises a first push plate (2281) slidably connected to the movable part, and used for assembling the first movable plate (2261) and the second movable plate (2262); The action part (228) also includes a reset block (2282) arranged on the movable part, and a reset member (2284) is arranged between the reset block (2282) and the first push plate (2281), and the reset member (2284) acts on the first push plate (2281) so that it has a movement tendency toward the center of the accommodating hole (220).

6. The battery welding rotating fixture according to claim 5, characterized in that: The unlocking portion (227) includes a first hooking portion (2272), and a second hooking portion (2286) is provided on the first push plate (2281). When the movable portion rotates to an unlocking position relative to the outer ring (221), the first hooking portion (2272) can hook with the second hooking portion (2286) to drive the first push plate (2281) so that it can move in a direction away from the center of the accommodating hole (220).

7. The battery welding rotating fixture according to claim 2, characterized in that: The mover portion comprises a first rotating disk (223) and a second rotating disk (224) which are arranged at intervals, the first rotating disk (223) and the second rotating disk (224) are connected via a rotating block (225), and the accommodating hole (220) sequentially penetrates the first rotating disk (223), the rotating block (225) and the second rotating disk (224); The pressing plate (226) is disposed on the first rotating disk (223); The side walls of the accommodating hole (220) located on the second rotating disk (224) and the rotating block (225) are provided with avoidance grooves (2251), and the width of the avoidance grooves (2251) is smaller than the width of the battery (1).

8. The battery welding rotating fixture according to claim 7, characterized in that: A first bearing surface (2252) for placing a battery (1) is arranged on the inner wall of the accommodating hole (220), and the first bearing surface (2252) is distributed on at least one side of the avoiding groove (2251).

9. The battery welding rotating fixture according to claim 8, characterized in that: An auxiliary plate is provided on the second rotating disk (224), and the auxiliary plate is used to press the battery (1) on one side of the second rotating disk (224).

10. The battery welding rotating fixture according to claim 2, characterized in that: A second air hole is provided through the air pipe push plate (232), the second air hole is provided corresponding to the first air hole, an air cooling joint (2321) is installed at an end of the second air hole away from the air pipe mounting frame (21), and a silicone sleeve (2322) is provided at an end of the second air hole close to the air pipe mounting frame (21).

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