A laser welding device for battery module processing

Abstract

This invention discloses a laser welding device for battery module processing, relating to the field of laser welding technology. It includes a chassis, a work platform, a slide table, a cylinder, a negative pressure unit, a laser generator, a support plate, a swing arm, cleaning claws, a mounting block, and a dust collection unit. The chassis is fixedly mounted, the work platform is located at the bottom of the chassis, the slide table is slidably connected to the top of the chassis for horizontal movement, the cylinder is fixedly connected to the top of the slide table, the negative pressure unit is mounted on the output shaft of the cylinder, and the laser generator is connected to the end of the output shaft of the cylinder. This invention, through the swing arm and cleaning claws, can compress the manifold and clean dust and stains from its surface before welding, providing a clean environment for welding. The swing arm's movement opens the cleaning claws and simultaneously activates the laser generator for welding. During welding, the dust collection unit is automatically activated to remove metal particles and fumes generated during welding, protecting the laser generator.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a laser welding apparatus for battery module processing. Background Technology

[0002] In the manufacturing process of battery modules, laser welding is a crucial step in ensuring reliable electrical connections and a robust mechanical structure between battery cells and between cells and connecting plates. It can be said that the quality of laser welding directly determines the performance, safety, and lifespan of the battery module.

[0003] Before welding, the busbar, terminals and other components of the battery module are photographed and image-recognized using an industrial camera to accurately determine the welding position and compensate for positional deviations during material delivery or assembly.

[0004] After welding is completed, the system can again use a vision system to inspect the appearance of the weld (such as width and defects). Among them, OCT penetration depth detection technology can measure the actual penetration depth of the weld non-contactly, providing key data for welding quality and achieving "100% full inspection" instead of traditional destructive sampling inspection.

[0005] However, in practical applications, there are still some unresolved issues. The following are some common problems of laser welding equipment used in battery module processing: Each welding point of a cylindrical battery corresponds to a cell terminal. When there is oil or moisture in the welding point area, or when the laser energy is too high or the parameters are inappropriate, pits and metal particles will appear on the weld surface, reducing the welding strength. At the same time, the spatter falling into the battery may cause a short circuit, affecting battery module production. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] In view of the problems existing in the above and / or existing laser welding apparatus for battery module processing, the present invention is proposed.

[0008] Therefore, the problem to be solved by this invention is how to solve the problems of pits and metal particle splashing that occur during the welding process of battery module solder joints, thereby improving the quality of battery modules.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a laser welding device for battery module processing, comprising a chassis and a working platform and a slide respectively disposed at the bottom and top of the chassis, a cylinder fixed on the top of the slide and connected to a laser generator through an output shaft, a negative pressure unit disposed on the output shaft of the cylinder, a support plate slidably connected to the laser generator, a swing arm disposed on both sides of the bottom of the support plate, a cleaning claw disposed at the bottom of the swing arm and connected to the bottom of the negative pressure unit through a first conduit, a mounting block fixed at the bottom of the laser generator, a dust collection unit disposed on both sides of the mounting block and connected to the top of the negative pressure unit through a second conduit, the second conduit, the first conduit and the negative pressure unit causing the dust collection unit and the cleaning claw to generate negative pressure sequentially.

[0010] As a preferred embodiment of the laser welding device for battery module processing described in this invention, the negative pressure unit includes a sleeve fixedly connected to the slide table, and exhaust holes are respectively opened at the bottom and top of the side wall of the sleeve. A piston is slidably connected inside the sleeve and connected to the output shaft of the cylinder. Multiple one-way valves are provided and are connected one-to-one to the exhaust holes and the positions of the first and second conduits. The piston and the one-way valves allow the second and first conduits to intermittently draw in air.

[0011] In a preferred embodiment of the laser welding device for battery module processing described in this invention, the piston has a receiving groove at its top, a support spring is fixedly connected in the receiving groove, and the outer wall of the output shaft is machined with a limiting groove for piston sliding.

[0012] In a preferred embodiment of the laser welding device for battery module processing described in this invention, the bottom of the cleaning claw is provided with a dust accumulation groove, and a scraper for sealing the dust accumulation groove is rotatably connected to the bottom of the cleaning claw. A cleaning cloth is detachably connected to the bottom of the scraper.

[0013] As a preferred embodiment of the laser welding device for battery module processing described in this invention, the dust collection unit includes a negative pressure suction head that is slidably connected to the mounting block, the air inlet of the negative pressure suction head extends to the bottom of the laser generator, and a valve plate is hinged above the air inlet of the negative pressure suction head to block the air inlet.

[0014] As a preferred embodiment of the laser welding device for battery module processing described in this invention, the negative pressure suction head has an exhaust port on the side near the mounting block, a filter element is detachably connected inside the exhaust port, and a flow channel is provided inside the mounting block so that the exhaust port is connected to the conduit.

[0015] In a preferred embodiment of the laser welding device for battery module processing described in this invention, a gear is coaxially connected to the swing shaft of the swing arm, and a rack that meshes with the gear is fixedly connected to the side wall of the negative pressure suction head.

[0016] As a preferred embodiment of the laser welding device for battery module processing described in this invention, a control console is fixedly connected to one side of the bottom of the support plate, a sliding groove is provided at the bottom of the control console and a pressure switch one is slidably connected thereto, a pressure switch two is fixedly connected to the side of the sliding groove away from the swing arm, and a push rod for pushing the pressure switch one is rotatably connected to the side of one of the swing arms away from the mounting block.

[0017] As a preferred embodiment of the laser welding device for battery module processing described in this invention, the side wall of the swing rod is provided with a guide groove along the length direction of the swing rod and a slider is slidably connected thereto. The side wall of the slider is fixedly connected to the cleaning claw, and an elastic element is fixedly connected between the top of the slider and the guide groove.

[0018] In a preferred embodiment of the laser welding device for battery module processing described in this invention, the mounting block has a circular groove on the side near the negative pressure suction head, a positioning block is connected to the circular groove by a compression spring, and the side wall of the negative pressure suction head has a slot for engaging with the positioning block.

[0019] The beneficial effects of this invention are as follows: the swing arm and cleaning claw can be used to press the busbar and clean the dust and stains on the surface of the busbar before welding, providing a clean environment for welding. At the same time, the swing arm opens the cleaning claw, which can also activate the laser generator for welding. During the welding process, the dust collection unit is automatically activated to suck up the metal particles and fumes generated by welding, thus protecting the laser generator. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A scene illustration of a laser welding device used for battery module processing.

[0022] Figure 2 This is a schematic diagram of the internal structure of a laser welding device used for battery module processing.

[0023] Figure 3 This is a schematic diagram of the laser generator in a laser welding device for battery module processing.

[0024] Figure 4 This is a schematic diagram of the negative pressure unit in a laser welding device for battery module processing.

[0025] Figure 5 A schematic diagram of the cleaning claw in a laser welding device for battery module processing.

[0026] Figure 6 This is a schematic diagram of the dust collection unit in a laser welding device for battery module processing.

[0027] In the diagram: 1. Chassis; 2. Work platform; 3. Slide table; 4. Cylinder; 5. Negative pressure unit; 51. Sleeve; 52. Piston; 53. One-way valve; 6. Laser generator; 7. Support plate; 8. Swing arm; 9. Cleaning claw; 10. Mounting block; 11. Dust collection unit; 111. Negative pressure suction head; 112. Valve plate; 12. Conduit 1; 13. Conduit 2; 14. Exhaust port; 15. Receiving groove; 16. Support spring ; 17. Limiting groove; 18. Dust collection groove; 19. Scraper; 20. Cleaning cloth; 21. Exhaust port; 22. Filter element; 23. Flow channel; 24. Gear; 25. Rack; 26. Control console; 27. Slide groove; 28. Pressure switch one; 29. ​​Pressure switch two; 30. Push rod; 31. Guide groove; 32. Slider; 33. Elastic component; 34. Circular groove; 35. Compression spring; 36. Positioning block; 37. Slot. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1, referring to Figures 1-6 This is the first embodiment of the present invention, which provides a laser welding device for battery module processing. The laser welding device for battery module processing includes a chassis 1, a work platform 2, a slide table 3, a cylinder 4, a negative pressure unit 5, a laser generator 6, a support plate 7, a swing arm 8, a cleaning claw 9, a mounting block 10, and a dust collection unit 11. By deeply integrating laser welding with pre-welding cleaning, in-welding dust removal, and weld quality monitoring functions, the welding defects caused by busbar surface contamination or welding spatter can be effectively solved, significantly improving the production yield and safety of battery modules.

[0032] Specifically, the chassis 1 is fixedly installed to provide a mounting base for each moving part.

[0033] The work platform 2 is located at the bottom of the chassis 1 and is used to carry the battery modules to be welded, which are transported by the AGV trolley.

[0034] The slide table 3 is slidably connected to the top of the chassis 1 and can move precisely horizontally under the control of the X-axis and Y-axis linear drive units to achieve solder joint positioning.

[0035] Cylinder 4 is fixedly connected to the top of slide 3, and its output shaft extends vertically downward to drive laser generator 6 to perform lifting and lowering movements.

[0036] The negative pressure unit 5 is located on the output shaft of the cylinder 4 and is used to provide a power source for cleaning and dust removal.

[0037] The laser generator 6 is connected to the output shaft end of the cylinder 4, and can approach or move away from the welding station under the drive of the cylinder.

[0038] The support plate 7 is slidably connected to the laser generator 6 and can float up and down relative to the laser generator 6 to a limited extent.

[0039] The swing arms 8 are located on both sides of the bottom of the support plate 7. Cleaning claws 9 are slidably connected to the bottom of the swing arms 8 and communicate with the bottom of the negative pressure unit 5 via conduit 12. They are used to clean the manifold surface before welding. Figure 3 As can be seen, there is an inclined angle between the cleaning claw 9 and the swing arm 8, which allows the two cleaning claws 9 to collide with each other when the swing arms 8 on both sides swing back. At this time, the cleaning claw 9 can completely clean the welding area below the laser generator 6 when it is working, avoiding the generation of cleaning dead corners.

[0040] Mounting block 10 is fixedly connected to the bottom of laser generator 6, and dust collection unit 11 is slidably connected to both sides of mounting block 10 and connected to the top of negative pressure unit 5 through conduit 2 13 respectively, for absorbing metal vapor and spatter particles generated during welding.

[0041] Both conduit 12 and conduit 2 13 utilize flexible corrugated tubing to ensure stable negative pressure conduction under the high-temperature environment of laser welding. Sealing rings are installed at each connection point to prevent air leakage and ensure efficient cleaning and dust extraction. The entire structure is compactly integrated into the laser generator 6 body, without occupying additional equipment space, and is suitable for production line cycle requirements.

[0042] The X-axis and Y-axis linear drive units, vision modules, AGV vehicles, etc. mentioned above are all existing technologies, and the working principles of this part are also existing technologies, which can be clearly understood by those skilled in the art, and will not be elaborated here.

[0043] Example 2, refer to Figures 3-5This is the second embodiment of the present invention, which is based on the previous embodiment.

[0044] Specifically, the negative pressure unit 5 includes a sleeve 51, a piston 52, and a one-way valve 53. The sleeve 51 is fixedly connected to the slide table 3, and exhaust holes 14 are respectively opened at the bottom and top of the side wall of the sleeve 51. The piston 52 is slidably connected inside the sleeve 51 and connected to the output shaft of the cylinder 4, so that the piston 52 can slide inside the sleeve 51 as the output shaft extends and retracts, thereby changing the volume of the top and bottom of the sleeve 51 and generating suction or pressure. Multiple one-way valves 53 are provided and are connected one-to-one with the exhaust holes 14 and the positions of the first conduit 12 and the second conduit 13, which are used to control the airflow direction, ensuring that the negative pressure unit 5 draws air through the second conduit 13 when the output shaft extends and draws air through the first conduit 12 when the output shaft retracts, realizing the function switching.

[0045] A receiving groove 15 is provided on the top of the piston 52, and a support spring 16 is fixedly connected inside the receiving groove 15. A limiting groove 17 for sliding of the piston 52 is machined on the outer wall of the output shaft. The support spring 16 always applies a downward thrust to the piston 52, causing it to tend to move downward with the output shaft, generating a negative pressure at the top of the sleeve 51. When the dust collection unit 11 is not activated, the continued downward movement of the piston 52 will increase the negative pressure until the negative pressure is equal to the supporting force of the support spring 16, at which point the piston 52 is in the middle of the limiting groove 17. After the dust collection unit 11 is activated, the air intake reduces the negative pressure. At this time, the support spring 16 can continue to push the piston 52 downward until it contacts the bottom of the limiting groove 17, thereby assisting in generating a continuous negative pressure during the dust removal stage.

[0046] The bottom of the cleaning claw 9 has a dust collection groove 18, and a scraper 19 that seals the dust collection groove 18 is rotatably connected to the bottom of the cleaning claw 9. A cleaning cloth 20 is detachably connected to the bottom of the scraper 19. This design allows the scraper 19 to adaptively rotate when it contacts the manifold, ensuring that its tip is always in close contact with the surface for scraping, while the cleaning cloth 20 performs a secondary wipe, both working together to ensure cleaning effectiveness. The scraped dust is eventually sucked into the dust collection groove 18 by negative pressure and temporarily stored in the dust collection groove 18.

[0047] To prevent dust from entering the negative pressure unit 5 through the conduit 12, a filter can be installed in the middle of the conduit 12. This filter can not only intercept dust but also temporarily store it, protecting the negative pressure unit 5 and making subsequent cleaning and maintenance simpler and more convenient. The working principle of this part is existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0048] Example 3, referring to Figure 6 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0049] Specifically, the vacuuming unit 11 includes a negative pressure suction head 111 and a valve plate 112. The negative pressure suction head 111 is slidably connected to the mounting block 10, and its air inlet extends to the bottom of the laser generator 6, adjacent to the welding point, for efficient dust removal. The valve plate 112 is hinged above the air inlet of the negative pressure suction head 111 and automatically droops down by gravity when there is no negative pressure, blocking the air inlet and preventing dust from falling into and contaminating the lens.

[0050] The negative pressure suction head 111 has an exhaust port 21 on the side near the mounting block 10. A filter element 22 is detachably connected to the exhaust port 21 via clips and bolts to filter inhaled metal particles, preventing them from entering the pipes and negative pressure unit 5. A flow channel 23 is provided within the mounting block 10, allowing the exhaust port 21 to communicate with the second conduit 13. When the negative pressure suction head 111 slides to a position where the exhaust port 21 aligns with the flow channel 23, the suction passage is activated.

[0051] To ensure the sliding stroke and positioning accuracy of the negative pressure suction head 111, limiting blocks can be connected to the upper and lower sides of the side wall of the negative pressure suction head 111 located on the mounting block 10.

[0052] To ensure the negative pressure suction head 111 is locked in position and automatically unlocked before and after operation, a circular groove 34 is provided on the side of the mounting block 10 near the negative pressure suction head 111. A positioning block 36 is connected to the circular groove 34 via a compression spring 35. A slot 37 is provided on the side wall of the negative pressure suction head 111 to engage with the positioning block 36. In the initial state, the positioning block 36 is engaged in the slot 37, and the exhaust port 21 is misaligned with the flow channel 23, thus turning off the vacuuming function. When the external thrust is large enough, the positioning block 36 is pressed back into the circular groove 34, the negative pressure suction head 111 unlocks and moves upward, aligning the exhaust port 21 with the flow channel 23, and vacuuming begins.

[0053] Example 4, refer to Figure 5 This is the fourth embodiment of the present invention, which is based on the first three embodiments.

[0054] Specifically, in order to achieve precise linkage between cleaning and welding actions, a gear 24 is coaxially connected to the swing shaft of the swing arm 8, and a rack 25 that meshes with the gear 24 is fixedly connected to the side wall of the negative pressure suction head 111. When the vacuuming unit 11 moves down with the mounting block 10, the rack 25 drives the gear 24 to rotate, which in turn drives the swing arm 8 to swing, causing the cleaning claw 9 to perform a sweeping action on the manifold.

[0055] To achieve precise timing control of the laser welding process, a control console 26 is fixedly connected to one side of the bottom of the support plate 7. A groove 27 is provided at the bottom of the control console 26, and a pressure switch 28 is slidably connected thereto. A pressure switch 29 is fixedly connected to the side of the groove 27 away from the rocker arm 8. A push rod 30 for pushing the pressure switch 28 is rotatably connected to the side of one of the rocker arms 8 away from the mounting block 10. A torsion spring is provided at the rotatable connection between the push rod 30 and the rocker arm 8, allowing the push rod 30 to remain in an upward tilted state for easy contact with the pressure switch 28. When welding is completed, pushing the pressure switch 28 to contact the pressure switch 29 automatically shuts down the laser generator 6, and pulling the pressure switch 28 back to its original position during reset.

[0056] To ensure a constant contact pressure between the cleaning claw 9 and the manifold without damaging the workpiece, a guide groove 31 is provided on the side wall of the swing arm 8 along its length, and a slider 32 is slidably connected thereto. The side wall of the slider 32 is fixedly connected to the cleaning claw 9, and an elastic element 33 is fixedly connected between the top of the slider 32 and the guide groove 31. This allows the compressible elastic element 33 to adaptively retract when the cleaning claw 9 is subjected to the reaction force of the manifold, ensuring scraping force while avoiding scratches or jamming caused by hard contact.

[0057] In use, the AGV trolley transports the battery module to the work platform 2 via a ramp on one side of the chassis 1. After the vision module accurately positions the overlapping area of ​​the end cap and the busbar of the battery module, the X-axis and Y-axis linear drive units drive the slide 3 to move horizontally, aligning the laser generator 6 with the weld point to be welded.

[0058] The welding process begins, cylinder 4 is activated, its output shaft extends, pushing laser generator 6 and mounting block 10 downwards together. Simultaneously, the support plate 7 and its bottom cleaning claw 9 also descend. When the cleaning claw 9 contacts the manifold surface, as laser generator 6 continues to descend, the cleaning claw 9, supported by the manifold, pushes the support plate 7 upwards relative to laser generator 6, achieving flexible contact. At the same time, the downward movement of mounting block 10 causes the dust collection unit 11 and its sidewall rack 25 to move downwards. The rack 25 drives gear 24 to rotate, causing the swing arms 8 on both sides to swing outwards, thereby causing the cleaning claw 9 to perform a scraping action on the manifold surface. During this process, slider 32 slides within guide groove 31 and compresses elastic element 33, ensuring that the cleaning claw 9 always maintains appropriate pressure against the manifold. The scraper 19 flips under friction, causing its tip to press firmly against the surface, working in conjunction with the cleaning cloth 20 at the bottom to effectively remove dust, oil, and other contaminants from the manifold surface.

[0059] As the cleaning claw 9 swings outward, the push rod 30 gradually approaches and eventually contacts the pressure switch 28. At this moment, the pressure switch 28 is triggered, sending a signal to the control system, and the laser generator 6 starts, beginning the welding of the busbar. At this time, the focus of the laser generator 6 is above the busbar (positive defocus state), with a large spot size and low energy density, gently heating the material through heat conduction to avoid excessive instantaneous energy causing violent metal splattering.

[0060] As the output shaft of cylinder 4 continues to extend, laser generator 6 and mounting block 10 continue to move downwards. The downward movement of vacuum unit 11 should have driven the swing arm 8 to swing further, but because push rod 30 has already contacted pressure switch 28 and begun to push pressure switch 28 to slide within slide groove 27, resistance is generated, limiting the further swing of swing arm 8. At this time, the negative pressure suction head 111 of vacuum unit 11 receives an upward thrust from rack 25 and gear 24, which overcomes the elastic force of compression spring 35, pressing positioning block 36 out of slot 37, thus unlocking the negative pressure suction head 111. The unlocked negative pressure suction head 111 slides upwards (relative movement) on the side wall of mounting block 10 until its exhaust port 21 aligns with the flow channel 23 within mounting block 10.

[0061] Once the exhaust port 21 and the flow channel 23 are connected, the second conduit 13 connects the negative pressure suction head 111 to the top of the negative pressure unit 5. At this time, as the output shaft of the cylinder 4 extends, the piston 52 moves down synchronously under the push of the support spring 16, increasing the space at the top of the sleeve 51 and generating negative pressure. This negative pressure is transmitted to the air inlet of the negative pressure suction head 111 through the second conduit 13 and the flow channel 23, and begins to powerfully remove the metal vapor and spatter particles generated during the laser welding process, effectively protecting the lens of the laser generator 6 from contamination.

[0062] As the laser generator 6 continues to move downwards until its focal point coincides with the busbar surface (zero defocus), the welding mode enters a deep penetration welding mode with concentrated energy. At this time, the push rod 30 continues to push the pressure switch 28 backwards within the slide groove 27. When the laser spot reaches the preset penetration depth (i.e., the laser generator 6 moves downwards to the set negative defocus position), the pressure switch 28 contacts the pressure switch 29 at the end of the slide groove 27. The pressure switch 29 is triggered, sending a signal to the control system to immediately shut down the laser generator 6, thereby precisely controlling the penetration depth and welding quality of the weld joint and avoiding over-welding or incomplete welding.

[0063] After a single weld point is completed, cylinder 4 resets, pulling laser generator 6 and mounting block 10 upwards. During the upward movement, the limiting groove 17 on the output shaft drives piston 52 upwards, compressing the space at the top of sleeve 51 and simultaneously generating negative pressure at the bottom of sleeve 51. This negative pressure is transmitted through conduit 12 to the opening of dust collection trough 18 of cleaning claw 9, drawing dust particles previously scraped up by scraper 19 and temporarily stored in dust collection trough 18 into the conduit, where they are filtered by 22 and collected, thus achieving automatic recycling of cleaning waste.

[0064] Simultaneously, the upward movement of the mounting block 10 causes the dust collection unit 11 to move upward, and the rack 25 drives the gear 24 to reverse, causing the swing arm 8 and cleaning claw 9 to reset. The mutually abutting cleaning claws 9 will press their respective scrapers 19, thereby causing the scrapers 19 to flip and block the dust accumulation groove 18 under the action of the resisting thrust, preventing dust from scattering. The push rod 30 disengages from the pressure switch 28, and the pressure switch 28 slides back to its initial position along the slide groove 27 under the action of the torsion spring. During the downward movement of the negative pressure suction head 111 relative to the mounting block 10, when its slot 37 is aligned with the positioning block 36, the positioning block 36 re-engages into the slot 37 under the action of the compression spring 35, locking the negative pressure suction head 111. At this time, the exhaust port 21 is misaligned with the flow channel 23, the dust collection function is turned off, and the valve plate 112 falls back under the action of gravity, blocking the air inlet and preventing external dust from entering.

[0065] At this point, the entire process of "cleaning-welding-dust removal-resetting" for a single weld point is completed automatically. Subsequently, the slide table 3 moves to the next weld point under the precise control of the X and Y axis drive units, repeating the above process to achieve efficient and high-quality automated welding of the battery module.

[0066] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A laser welding apparatus for battery module processing, characterized in that: include The chassis (1) and the work platform (2) and slide (3) respectively located at the bottom and top of the chassis (1). The cylinder (4) is fixed on the top of the slide (3) and connected to the laser generator (6) via the output shaft. The negative pressure unit (5) is installed on the output shaft of the cylinder (4). The support plate (7) is slidably connected to the laser generator (6). The swing arm (8) is located on both sides of the bottom of the support plate (7). The cleaning claw (9) is located at the bottom of the swing arm (8) and connected to the bottom of the negative pressure unit (5) through conduit one (12). The mounting block (10) is fixed to the bottom of the laser generator (6). The vacuum unit (11) is located on both sides of the mounting block (10) and is connected to the top of the negative pressure unit (5) through the second conduit (13). The second conduit (13), the first conduit (12), and the negative pressure unit (5) cause the vacuum unit (11) and the cleaning claw (9) to generate negative pressure in sequence.

2. The laser welding apparatus for battery module processing as described in claim 1, characterized in that: The negative pressure unit (5) includes The sleeve (51) is fixedly connected to the slide (3), and the bottom and top of the side wall of the sleeve (51) are respectively provided with exhaust holes (14). The piston (52) is slidably connected inside the sleeve (51) and connected to the output shaft of the cylinder (4). Multiple one-way valves (53) are provided and are connected one-to-one to the positions of the exhaust port (14) and the first conduit (12) and the second conduit (13). The piston (52) and the check valve (53) allow the second conduit (13) and the first conduit (12) to draw in air intermittently.

3. The laser welding apparatus for battery module processing as described in claim 2, characterized in that: The piston (52) has a receiving groove (15) on its top, and a support spring (16) is fixedly connected inside the receiving groove (15). The outer wall of the output shaft is machined with a limiting groove (17) for the piston (52) to slide.

4. The laser welding apparatus for battery module processing as described in claim 2 or 3, characterized in that: The bottom of the cleaning claw (9) is provided with a dust accumulation groove (18), and the bottom of the cleaning claw (9) is rotatably connected to a scraper (19) that blocks the dust accumulation groove (18). The bottom of the scraper (19) is detachably connected to a cleaning cloth (20).

5. The laser welding apparatus for battery module processing as described in claim 2 or 3, characterized in that: The vacuum unit (11) includes The negative pressure suction head (111) is slidably connected to the mounting block (10). The air inlet of the negative pressure suction head (111) extends to the bottom of the laser generator (6). The valve plate (112) is hinged above the air inlet of the negative pressure suction head (111) to block the air inlet.

6. The laser welding apparatus for battery module processing as described in claim 5, characterized in that: The negative pressure suction head (111) has an exhaust port (21) on the side near the mounting block (10). A filter element (22) is detachably connected inside the exhaust port (21). A flow channel (23) is provided inside the mounting block (10) so that the exhaust port (21) is connected to the second conduit (13).

7. The laser welding apparatus for battery module processing as described in claim 6, characterized in that: A gear (24) is coaxially connected to the swing shaft of the swing arm (8), and a rack (25) that meshes with the gear (24) is fixedly connected to the side wall of the negative pressure suction head (111).

8. The laser welding apparatus for battery module processing as described in claim 1 or 7, characterized in that: A control panel (26) is fixedly connected to one side of the bottom of the support plate (7). A sliding groove (27) is provided at the bottom of the control panel (26) and a pressure switch (28) is slidably connected thereto. A pressure switch (29) is fixedly connected to the side of the sliding groove (27) away from the rocker arm (8). A push rod (30) for pushing the pressure switch (28) is rotatably connected to the side of one of the rocker arms (8) away from the mounting block (10).

9. The laser welding apparatus for battery module processing as described in claim 1 or 7, characterized in that: The side wall of the swing rod (8) is provided with a guide groove (31) along the length direction of the swing rod (8) and a slider (32) is slidably connected thereto. The side wall of the slider (32) is fixedly connected to the cleaning claw (9), and an elastic element (33) is fixedly connected between the top of the slider (32) and the guide groove (31).

10. The laser welding apparatus for battery module processing as described in claim 6 or 7, characterized in that: The mounting block (10) has a circular groove (34) on the side near the negative pressure suction head (111). A positioning block (36) is connected in the circular groove (34) by a compression spring (35). The side wall of the negative pressure suction head (111) has a slot (37) that engages with the positioning block (36).

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