Battery module welding device

Abstract

The invention relates to the technical field of welding devices, in particular to a battery module welding device which comprises a machine table. The feeding mechanism is used for feeding the battery module; and the welding mechanism is used for welding the battery module. According to the battery module welding device, through the arrangement of the feeding mechanism, the battery modules on the two stations are moved to the welding position in turn to be welded, the welding efficiency is improved, the battery modules are fixed while the battery modules to be welded are moved to the welding position, displacement of the battery modules during welding is avoided, the welding quality is improved, and the welding efficiency is improved. And meanwhile, fixing of the battery modules is relieved while the welded battery modules are moved to the feeding position, the battery modules can be ejected out of the containing groove, workers can conveniently take out and replace the to-be-welded battery modules, and the welding efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and particularly to a battery module welding device. Background Art

[0002] As a new energy power device with high energy density, many cycle times, and long service life, lithium batteries are gradually becoming the main energy storage device and power source of new energy vehicles. A lithium battery module is a component unit of a lithium battery pack, and it is composed of several single battery cells. The outside of the lithium battery module is a rectangular frame structure formed by welding side plates and end plates, and the inside contains an insulating plate adjacent to the end plate and several single battery cells.

[0003] Chinese Patent with Application No. CN202310841755.3 discloses a square lithium battery module automatic welding device, including a feeding device, an automatic fixture, a rotary table, and a welding robot. The battery module includes square battery cells, an insulating plate, an end plate, and a side plate, and the welding position is the contact part between the side plate and the end plate. The automatic material taking device reciprocates between the part taking position, the part fixing position, the welding station, and the material taking station through two mutually perpendicular linear motion modules. The side plate is sucked and clamped through a vacuum chuck and a fixing plate. The automatic fixture device fixes the battery module through a telescopic cylinder with a guide rail and a fixture plate, and fixes the side plate through a vacuum chuck and a linear motion module for welding. The welding robot consists of a robotic arm and a welding gun for welding parts. The rotary table is driven by a motor and rotates 180° each time, enabling the position switching of two stations on the table and capable of performing continuous and efficient cyclic automated welding operations.

[0004] However, when welding the battery module components in this patent, it is necessary to first fix the battery module and then perform the position switching of two stations on the table. Since it takes a certain amount of time to fix the battery module each time, the battery module cannot be fixed while the position is being switched, thus reducing the working efficiency.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above defects. Summary of the Invention

[0006] The purpose of the present invention is to provide a battery module welding device that can effectively solve the above technical problems.

[0007] To achieve the purpose of the present invention, the following technical solutions are adopted:

[0008] A battery module welding device includes: a machine table; a feeding mechanism for feeding the battery module; a welding mechanism for welding the battery module;

[0009] The feeding mechanism includes: a support column rotatably installed on the machine table; a placement seat fixedly installed at the top of the support column; a placement groove formed on the placement seat; a linkage gear ring fixedly sleeved on the support column; a linkage gear meshed and connected with the linkage gear ring; a first power source for driving the linkage gear to rotate; a fixing component for fixing the battery module; and a supporting component for supporting the battery module.

[0010] The fixing component includes: a fixing tube fixedly installed in the placement groove; a clamping rod penetratingly installed on the fixing tube; a first piston fixedly installed at one end of the clamping rod; a clamping plate fixedly installed at the other end of the clamping rod; a return spring for driving the clamping rod to reset; and a liquid supply unit for supplying hydraulic oil into the fixing tube.

[0011] Further, the liquid supply unit includes: a linkage tube fixedly installed at the bottom end of the support column; a linkage rod penetratingly installed on the linkage tube; a second piston fixedly installed at one end of the linkage rod; a rolling member rotatably installed at the other end of the linkage rod; a fixing cylinder fixedly installed in the machine table; a guiding groove formed in the fixing cylinder; a liquid guiding tube connecting the linkage tube and the fixing tube; and the rolling member is rollingly installed in the guiding groove.

[0012] Further, the supporting component includes: a second power source fixedly installed in the placement groove; and a supporting plate fixedly installed at the movable end of the second power source.

[0013] Further, the welding mechanism includes: a laser welding head; a vertical movement module for driving the laser welding head to move vertically; a three-axis movement module for adjusting the welding position of the laser welding head; and a protection component for protecting the laser welding head.

[0014] The protection component includes: a protection shell; a protection plate slidably installed on the protection shell; a movable plate movably installed in the protection shell; a third power source for driving the protection plate to move; a circular tube fixedly installed on the movable plate; and a guiding unit for guiding the movement of the movable plate.

[0015] Further, the guiding unit includes: a guiding tube fixedly installed in the protection shell; and a guiding rod penetratingly installed in the guiding tube.

[0016] Further, the welding mechanism further includes: a filtering component for filtering welding fumes.

[0017] The filtering component includes: a filter housing fixedly installed inside the protective housing; a filter screen and an exhaust fan fixedly installed inside the filter housing; an annular pipe fixedly installed on the movable plate; an air inlet pipe connecting the annular pipe and the circular pipe; a guide pipe connecting the annular pipe and the air inlet end of the exhaust fan; and an air outlet pipe communicating with the air outlet end of the exhaust fan.

[0018] Furthermore, the welding mechanism further includes: a limiting component for limiting the protective plate;

[0019] The limiting component includes: a limiting housing fixedly installed on the protective housing; a sliding rod fixedly installed inside the limiting housing; a sliding plate slidably installed on the sliding rod; and a linkage spring for driving the protective plate to reset.

[0020] Furthermore, the welding mechanism further includes: a pre-cleaning component for cleaning the laser welding head before use;

[0021] The pre-cleaning component includes: a bladder fixedly installed between the sliding plate and the limiting housing; and a connecting pipe I connecting the bladder and the circular pipe.

[0022] Furthermore, the welding mechanism further includes: a piston III slidably installed inside the guide pipe; and a connecting pipe II connecting the guide pipe and the filter housing.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] A battery module welding device of the present invention realizes the rotation of battery modules at two workstations to the welding position for welding through the setting of the feeding mechanism, improves the welding efficiency, and fixes the battery modules to be welded while moving them to the welding position, avoiding displacement during welding and improving the welding quality. At the same time, while moving the welded battery modules to the feeding position, the fixation of the battery modules is released, and the battery modules can be ejected from the placement groove, facilitating the staff to take out and replace the battery modules to be welded, further improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention.

[0026] Figure 1 is a three-dimensional schematic diagram of a battery module welding device of the present invention;

[0027] Figure 2 is a sectional view of the component machine platform of a battery module welding device of the present invention;

[0028] Figure 3Schematic cross-sectional view of the component linkage pipe of a battery module welding device of the present invention;

[0029] Figure 4 For a battery module welding device of the present invention Figure 3 Enlarged view of area A;

[0030] Figure 5 Schematic three-dimensional view of the component three-axis moving module of a battery module welding device of the present invention;

[0031] Figure 6 Schematic cross-sectional view of the component protective shell of a battery module welding device of the present invention;

[0032] Figure 7 For a battery module welding device of the present invention Figure 6 Enlarged view of area B;

[0033] Figure 8 Schematic cross-sectional view of the component filter shell of a battery module welding device of the present invention.

[0034] In the figure:

[0035] 1. Machine platform; 2. Loading mechanism; 21. Support column; 22. Placing seat; 23. Linkage gear; 24. Linkage gear ring; 25. Power source one; 26. Fixing component; 261. Fixing pipe; 262. Piston one; 263. Clamping rod; 264. Clamping plate; 265. Return spring; 266. Liquid supply unit; 2661. Linkage pipe; 2662. Piston two; 2663. Linkage rod; 2664. Rolling part; 2665. Fixed cylinder; 2666. Guide groove; 2667. Liquid guide pipe; 27. Support component; 271. Support plate; 272. Power source two; 3. Welding mechanism; 31. Laser welding head; 32. Vertical moving module; 33. Three-axis moving module; 34. Protection component; 341. Protective shell; 342. Protection plate; 343. Movable plate; 344. Power source three; 345. Circular pipe; 346. Guide unit; 3461. Guide pipe; 3462. Guide rod; 35. Filter component; 351. Filter shell; 352. Exhaust fan; 353. Annular pipe; 354. Air inlet pipe; 355. Air guide pipe; 356. Air outlet pipe; 357. Filter net; 36. Limit component; 361. Limit shell; 362. Slide plate; 363. Slide rod; 364. Linkage spring; 37. Pre-cleaning component; 371. Bladder; 372. Connecting pipe one; 38. Piston three; 39. Connecting pipe two. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are 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 limiting the protection scope of the present invention. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0038] As Figures 1 to 8 shown, a battery module welding device of the present invention includes: a machine table 1; a loading mechanism 2 for loading the battery module; and a welding mechanism 3 for welding the battery module.

[0039] The loading mechanism 2 includes: a support column 21 rotatably mounted on the machine table 1; a placement seat 22 fixedly mounted on the top of the support column 21; placement grooves opened on the placement seat 22, and there are two placement grooves; a linkage gear ring 24 fixedly sleeved on the support column 21; a linkage gear 23 meshed with the linkage gear ring 24; a power source 25 for driving the linkage gear 23 to rotate, and the power source 25 is fixedly mounted on the machine table 1; a fixing component 26 for fixing the battery module, and there are two groups of fixing components 26; a support component 27 for supporting the battery module, and there are two groups of support components 27.

[0040] When loading the battery module, place the battery module in the placement groove. At this time, start the power source 25 to drive the linkage gear 23 to rotate. The linkage gear 23 drives the linkage gear ring 24 to rotate. The linkage gear ring 24 drives the support column 21 to rotate. The support column 21 drives the placement seat 22 to rotate, thereby driving the battery module to move below the welding mechanism 3. At this time, start the welding mechanism 3 to weld the battery module.

[0041] It is supplemented here that the power source 25 is preferably a motor.

[0042] In the present invention, two fixing components 26 are provided, that is, there are two fixing stations. By starting the first power source 25, the battery modules on the two stations can be rotated to the welding position for welding in turn. During the process of manually removing the welded finished product and placing the battery module to be welded, the welding work can also be carried out, improving the welding efficiency.

[0043] The support component 27 includes: a second power source 272 fixedly installed in the placement groove; a support plate 271 fixedly installed at the movable end of the second power source 272.

[0044] When placing the battery module to be welded, start the second power source 272 to drive the support plate 271 to move upward, so that the support plate 271 moves out of the placement groove. At this time, place the battery module on the support plate 271, and then start the second power source 272 to drive the support plate 271 to reset, thereby driving the battery module into the placement groove.

[0045] When removing the battery module after welding is completed, start the second power source 272 again to drive the support plate 271 to move upward, so that the battery module moves out of the placement groove with the support plate 271. At this time, it is convenient to remove the battery module, improving the convenience of taking and placing the battery module.

[0046] It is supplemented here that the second power source 272 is preferably a cylinder.

[0047] The fixing component 26 includes: a fixing tube 261 fixedly installed in the placement groove; a clamping rod 263 penetrating and installed on the fixing tube 261; a first piston 262 fixedly installed at one end of the clamping rod 263, and the first piston 262 is slidably installed in the fixing tube 261; a clamping plate 264 fixedly installed at the other end of the clamping rod 263; a return spring 265 for driving the clamping rod 263 to reset, one end of the return spring 265 is fixedly connected to the first piston 262, and the other end of the return spring 265 is fixedly connected to the inner wall of the fixing tube 261; a liquid supply unit 266 for supplying hydraulic oil into the fixing tube 261; the liquid supply unit 266 includes: a linkage tube 2661 fixedly installed at the bottom end of the support column 21; a linkage rod 2663 penetrating and installed on the linkage tube 2661; a second piston 2662 fixedly installed at one end of the linkage rod 2663, and the second piston 2662 is slidably installed in the linkage tube 2661; a rolling member 2664 rotatably installed at the other end of the linkage rod 2663; a fixing cylinder 2665 fixedly installed in the machine table 1; a guide groove 2666 opened in the fixing cylinder 2665, and the guide groove 2666 is composed of two U-shaped grooves with opposite directions and communicating with each other; the rolling member 2664 is rotatably installed in the guide groove 2666; a liquid guide tube 2667 connecting the linkage tube 2661 and the fixing tube 261.

[0048] The linkage pipe 2661 is divided into two independent spaces, upper and lower, by the piston II 2662, and hydraulic oil is stored above the piston II 2662.

[0049] When the support column 21 rotates, it can drive the two linkage pipes 2661 to rotate. The two linkage pipes 2661 drive the adjacent linkage rods 2663 to rotate, and the two linkage rods 2663 drive the adjacent rolling elements 2664 to move along the path of the guide groove 2666.

[0050] In the initial state, one of the two groups of rotating cylinders is located at the feeding position, and the other is located at the welding position. The positions of the two fixing components 26 correspond to the positions of the adjacent placement grooves. As shown in the appendix Figure 3 As shown, the position of the left linkage pipe 2661 corresponds to the position of the placement groove at the feeding position, and the right linkage pipe 2661 corresponds to the placement groove at the welding position.

[0051] When the battery module is placed in the placement groove at the feeding position, the power source I 25 is started, so that the positions of the two placement grooves are interchanged. At this time, the left rolling element 2664 rolls from the low position to the high position along the path of the guide groove 2666, and the right rolling element 2664 rolls from the high position to the low position along the path of the guide groove 2666.

[0052] When the left rolling element 2664 rolls from the low position to the high position along the path of the guide groove 2666, it drives the linkage rod 2663 to move upward. The linkage rod 2663 drives the piston II 2662 to move upward. When the piston II 2662 moves upward, it squeezes the hydraulic oil in the linkage pipe 2661, so that the hydraulic oil enters the fixed pipe 261 through the liquid guide pipe 2667 and pushes the piston I 262 to move. The piston I 262 drives the clamping rod 263 to move, and the clamping rod 263 drives the clamping plate 264 to move, so that the two clamping plates 264 approach each other and drive the return spring 265 to compress, thereby realizing the centering fixation of the battery module.

[0053] After the welding of the battery module is completed, the placement groove at the welding position moves to the feeding position. At this time, the rolling element 2664 rolls from the high position to the low position along the path of the guide groove 2666, thereby driving the linkage rod 2663 to move downward. The linkage rod 2663 drives the piston II 2662 to move downward, so that the hydraulic oil in the fixed pipe 261 can be sucked into the linkage pipe 2661. At this time, under the elastic force of the return spring 265, the clamping plate 264 can be driven to reset, so that the clamping plate 264 does not have a fixing effect on the welded battery module, which is convenient for the staff to take out the welded battery module and replace the battery module to be welded.

[0054] In the present invention, through the provision of the feeding mechanism 2, the battery modules at two stations are alternately moved to the welding position for welding, improving the welding efficiency. At the same time, when the battery module to be welded is moved to the welding position, the fixing of the battery module is completed, avoiding the displacement of the battery module during welding and improving the welding quality. Meanwhile, when the welded battery module is moved to the feeding position, the fixing of the battery module is released, and the battery module can be ejected from the placement groove, facilitating the staff to take out and replace the battery module to be welded.

[0055] It should be added here that the rolling member 2664 is preferably a bull eye ball.

[0056] The welding mechanism 3 includes: a laser welding head 31; a vertical movement module 32 for driving the laser welding head 31 to move vertically; a three-axis movement module 33 for adjusting the welding position of the laser welding head 31; and a protection component 34 for protecting the laser welding head 31.

[0057] The vertical movement module 32 mainly consists of a fixed frame, a cylinder, and a movable seat; the fixed frame is fixedly installed on the machine table 1, the cylinder is fixedly installed on the fixed frame, the movable seat is slidably installed on the fixed frame, and the movable end of the cylinder is fixedly connected to the movable seat. The fixed frame is provided with guide blocks and guide rails for guiding and limiting the movable seat. The three-axis movement module 33 is fixedly installed at the bottom of the movable seat. By means of the vertical movement module 32, the laser welding head 31 can be moved to an appropriate height, and then the three-axis movement module 33 is started to further precisely adjust the welding position of the laser welding head 31.

[0058] The three-axis movement module 33 is a common movement module, which can drive the laser welding head 31 to move horizontally, longitudinally, and vertically, so as to adjust the welding position of the laser welding head 31, and then different positions of the battery module can be welded.

[0059] The protection component 34 includes: a protection shell 341 fixedly installed on the three-axis movement module 33; a protection plate 342 slidably installed on the protection shell 341, and an arc-shaped groove is opened on the protection plate 342; a movable plate 343 movably installed in the protection shell 341; a power source three 344 for driving the protection plate 342 to move; a circular tube 345 fixedly installed on the movable plate 343, the laser welding head 31 is fixedly installed on the movable plate 343 and is located inside the circular tube 345; a guiding unit 346 for guiding the movement of the movable plate 343; the guiding unit 346 includes: a guiding tube 3461 fixedly installed in the protection shell 341; a guiding rod 3462 penetrating through the guiding tube 3461; the guiding rod 3462 is fixedly connected to the movable plate 343.

[0060] When the laser welding head 31 is not in use, it is inside the protective shell 341. At this time, the protective plate 342 closes the protective shell 341. Through the mutual cooperation of the protective shell 341 and the protective plate 342, on the one hand, it can protect the laser welding head 31, avoiding damage to the laser welding head 31 caused by collision and affecting normal use. On the other hand, it can prevent dust from attaching to the surface of the laser cutting head, blocking or scattering the laser beam, resulting in the laser beam being unable to accurately focus on the welding area, thus reducing the welding precision problem.

[0061] When the laser welding head 31 is in use, by starting the power source three 344 to drive the movable plate 343 to move, the movable plate 343 drives the circular tube 345 to move. The circular tube 345 moves and abuts against the inclined surface of the arc groove on the protective plate 342, thereby driving the two protective plates 342 to move away from each other. When one end of the circular tube 345 close to the protective plate 342 moves outside the protective shell 341, the laser welding head 31 can be started for welding at this time.

[0062] When the movable plate 343 moves, it can drive the limit rod to move. Through the mutual cooperation of the limit rod and the limit tube, the movement of the movable plate 343 can be limited.

[0063] It should be added here that the power source three 344 is preferably an electric telescopic rod.

[0064] During the laser welding process, welding fumes are generated, which not only pollute the working environment but also affect the health of employees.

[0065] The welding mechanism 3 further includes: a filtering component 35 for filtering welding fumes; the filtering component 35 includes: a filter shell 351 fixedly installed inside the protective shell 341, and the fixed end of the power source three 344 is fixedly installed on the filter shell 351; a filter net 357 and an exhaust fan 352 fixedly installed inside the filter shell 351; a circular tube 353 fixedly installed on the movable plate 343; an air inlet pipe 354 connecting the circular tube 353 and the circular tube 345; a guide pipe 355 connecting the circular tube 353 and the air inlet end of the exhaust fan 352; and an air outlet pipe 356 communicating with the air outlet end of the exhaust fan 352.

[0066] When the laser welding head 31 performs cutting, by starting the exhaust fan 352, the filtered gas inside the filter shell 351 is discharged, and the welding fumes generated during welding are inhaled into the filter shell 351. That is, the welding fumes pass through the air inlet pipe 354, the circular tube 353, and the guide pipe 355 in sequence and enter the filter shell 351. Through the setting of the filter net 357, the welding fumes can be filtered, and the filtered gas is discharged through the exhaust fan 352, thus realizing the collection and filtration of welding fumes and avoiding the problem that welding fumes not only pollute the working environment but also affect the health of employees.

[0067] The filtered gas is discharged through the exhaust fan 352 and directed through the outlet pipe 356 towards the next welding location, where it can clean the dust on the surface of the welding area, thereby improving the welding quality.

[0068] In addition, since the filtered gas still has a high temperature, it can preheat the area to be welded on the metal plate, thereby increasing the temperature at the welding location, reducing the temperature gradient during welding, making the heat distribution at the welding location more uniform, and further improving the welding quality.

[0069] It should be added here that the filter net 357 is arranged in a V shape. On the one hand, it increases the filtration area and improves the filtration efficiency. On the other hand, it facilitates the sliding of the filtered dust from the air inlet side of the filter net 357, reducing the situation where dust adheres to the filter and causes the filter net 357 to become blocked.

[0070] The welding mechanism 3 further includes: a limiting component 36 for limiting the protective plate 342; the limiting component 36 includes: a limiting shell 361 fixedly installed on the protective shell 341; a sliding rod 363 fixedly installed inside the limiting shell 361; a sliding plate 362 slidably installed on the sliding rod 363; a linkage spring 364 for driving the protective plate 342 to reset; one end of the linkage spring 364 is fixedly connected to the sliding plate 362, and the other end of the linkage spring 364 is fixedly connected to the limiting shell 361.

[0071] When the two protective plates 342 move away from each other, they can drive the adjacent sliding plate 362 to move, thereby compressing the linkage spring 364. When the circular tube 345 moves into the protective shell 341, since there is no extrusion effect on the protective plate 342, through the elastic force of the linkage spring 364, the two protective plates 342 can be driven to move closer to each other.

[0072] The welding mechanism 3 further includes: a pre-cleaning component 37 for cleaning the laser welding head 31 before use; the pre-cleaning component 37 includes: a bladder 371 fixedly installed between the sliding plate 362 and the limiting shell 361; a connecting pipe 372 connecting the bladder 371 and the circular tube 345.

[0073] When the two protective plates 342 move away from each other, they can drive the adjacent sliding plate 362 to move, thereby compressing the adjacent bladder 371. At this time, the gas in the bladder 371 can be extruded, and the gas is blown towards the laser welding head 31 through the connecting pipe 372, thereby pre-cleaning the laser welding head 31 before use. Furthermore, it further avoids the problem that dust adheres to the surface of the laser cutting head, blocking or scattering the laser beam, resulting in the laser beam being unable to accurately focus on the welding location, thereby reducing the welding accuracy.

[0074] In addition, when the two protective plates 342 reset, due to the certain elasticity of the bladder 371, it can drive the protective plate 342 to reset.

[0075] The welding mechanism 3 further includes: a third piston 38 slidably mounted in the guide tube 3461, and the third piston 38 is fixedly connected to the guide rod 3462; a second connecting pipe 39 connecting the guide tube 3461 and the filter housing 351.

[0076] When the movable plate 343 resets, the guide rod 3462 can be driven to move. The guide rod 3462 drives the third piston 38 to slide in the guide tube 3461, so that the gas in the guide tube 3461 can be extruded. The gas blows towards the filter net 357 through the second connecting pipe 39 and sprays from the air outlet side of the filter net 357 to the air inlet side, so that the dust attached to the air inlet side of the filter net 357 can be blown off, avoiding the blockage of the filter net 357 and preparing for subsequent filtration use.

[0077] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, details are not described herein. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0078] It should be understood that for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. A battery module welding device, characterized in that: include: Machine; A loading mechanism for loading battery modules; A welding mechanism for welding the battery module; The feeding mechanism comprises: a support column rotatably mounted on the machine platform; a placement seat fixedly mounted on the top of the support column; a placement slot provided on the placement seat; a linkage gear ring fixedly sleeved on the support column; a linkage gear meshingly connected with the linkage gear ring; a power source for driving the linkage gear to rotate; a fixing component for fixing the battery module; a supporting component for supporting the battery module; The fixing assembly includes: a fixing tube fixedly installed in the placement groove; a clamping rod installed through the fixing tube; a piston fixedly installed at one end of the clamping rod; a clamping plate fixedly installed at the other end of the clamping rod; a reset spring that drives the clamping rod to reset; and a liquid supply unit that transports hydraulic oil into the fixing tube.

2. A battery module welding device as claimed in claim 1, characterized in that: The liquid supply unit includes: a linkage tube fixedly installed at the bottom end of the support column; a linkage rod installed through the linkage tube; a second piston fixedly installed at one end of the linkage rod; a rolling element rotatably installed at the other end of the linkage rod; a fixed cylinder fixedly installed in the machine; a guide groove provided in the fixed cylinder; a liquid guide tube connecting the linkage tube and the fixed tube; and the rolling element is rotatably installed in the guide groove.

3. A battery module welding device as claimed in claim 2, characterized in that: The support assembly comprises: a second power source fixedly installed in the placement groove; and a support plate fixedly installed at the movable end of the second power source.

4. A battery module welding device as claimed in claim 1, characterized in that: The welding mechanism includes: a laser welding head; a vertical moving module for driving the laser welding head to move vertically; a three-axis moving module for adjusting the welding position of the laser welding head; and a protective component for protecting the laser welding head; The protection assembly includes: a protection shell; a protection plate slidably mounted on the protection shell; a movable plate movably mounted in the protection shell; a power source for driving the protection plate to move; a round tube fixedly mounted on the movable plate; and a guide unit for guiding the movable plate when it moves.

5. A battery module welding device as claimed in claim 4, characterized in that: The guide unit comprises: a guide tube fixedly installed in the protective shell; and a guide rod penetrating and installed in the guide tube.

6. A battery module welding device as claimed in claim 5, characterized in that: The welding mechanism also includes: a filter assembly for filtering welding smoke; The filter assembly includes: a filter shell fixedly installed in the protective shell; a filter screen and an exhaust fan fixedly installed in the filter shell; an annular tube fixedly installed on the movable plate; an air inlet pipe connecting the annular tube and the circular tube; an air guide pipe connecting the annular tube and the air inlet end of the exhaust fan; and an air outlet pipe connected to the air outlet end of the exhaust fan.

7. A battery module welding device as claimed in claim 6, characterized in that: The welding mechanism further includes: a limiting component for limiting the position of the protective plate; The limiting assembly comprises: a limiting shell fixedly mounted on the protective shell; a sliding rod fixedly mounted in the limiting shell; a sliding plate slidably mounted on the sliding rod; and a linkage spring for driving the protective plate to return to its original position.

8. A battery module welding device as claimed in claim 7, characterized in that: The welding mechanism also includes: a pre-cleaning component for cleaning the laser welding head before use; The pre-cleaning component includes: a capsule body fixedly installed between the slide plate and the limiting shell; and a connecting pipe 1 connecting the capsule body and the circular pipe.

9. A battery module welding device as claimed in claim 8, characterized in that: The welding mechanism further comprises: a piston 3 slidably mounted in the guide tube; and a connecting tube 2 connecting the guide tube and the filter shell.

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