Lithium battery tab laser welding equipment and operation method

Abstract

The invention discloses lithium battery tab laser welding equipment and an operation method, and relates to the technical field of lithium battery processing. Comprising an equipment base, a support table is fixedly installed on the equipment base, a workbench is rotatably installed on the support table, a positioning assembly is arranged on the workbench, a lithium battery body is arranged on the positioning assembly, and a tab body is connected to the lithium battery body in a sticky mode; a supporting vertical plate is fixedly installed on the equipment base and located on one side of the support table, a driving assembly is arranged on the supporting vertical plate, symmetrically-arranged support rods are arranged on the driving assembly, and lifting grooves are formed in the support rods. Through cooperative use of the positioning assembly, the driving assembly and the auxiliary assembly, efficient and stable welding of the lithium battery body and the tab body is achieved, it is ensured that the lithium battery body and the tab body make full contact before welding, the welding quality and efficiency are improved, and the using effect of the welding equipment is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of lithium battery processing technology, specifically to laser welding equipment and operating methods for lithium battery tabs. Background Technology

[0002] Lithium-ion battery tab welding refers to the welding process used in the manufacturing of lithium-ion batteries to connect the battery tabs (usually made of aluminum or copper) to the positive and negative terminals of the battery body. The tabs are a crucial part of the battery's connection to the external circuitry; they connect the battery's internal structure to the external circuitry through welding, thereby enabling the transfer of electrical energy.

[0003] In lithium battery production, the welding quality of the tabs directly affects the battery's performance and safety. Current technologies for laser tab welding have several significant drawbacks. First, traditional welding equipment often uses robotic arms, which lack flexibility and precision, making it difficult to effectively maintain stability between the lithium battery body and the tab during welding. This instability leads to poor welding, consequently affecting the battery's conductivity and lifespan. Second, traditional welding equipment has a low level of automation, limiting production line efficiency. Frequent human intervention and operation consume significant time, hindering efficient and continuous production processes and severely reducing the overall efficiency of lithium battery production. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a laser welding device and operating method for lithium battery tabs, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A laser welding device for lithium battery tabs includes a base, a support platform fixedly mounted on the base, a worktable rotatably mounted on the support platform, a positioning component on the worktable, a lithium battery body mounted on the positioning component, and tabs adhesively connected to the lithium battery body.

[0007] A support plate is fixedly installed on the equipment base and on one side of the support platform. A drive assembly is provided on the support plate. A symmetrically arranged support rod is provided on the drive assembly. A lifting groove is opened on the support rod. A sliding connecting rod is slidably installed on the lifting groove. A welder is fixedly installed on the sliding connecting rod. A laser welding head is fixedly installed on the welder.

[0008] Auxiliary components are provided on both of the support rods.

[0009] Preferably, the drive assembly includes a drive motor fixedly mounted on the support plate, a drive shaft fixedly mounted on the output end of the drive motor, an intermittent gear fixedly mounted on the drive shaft, a rotating shaft rotatably mounted on the side end face of the support plate, a rotating gear fixedly mounted on the rotating shaft, a T-shaped shaft fixedly mounted on the side end face of the rotating gear, a drive rod rotatably mounted on the T-shaped shaft, and a drive crossbar rotatably mounted on the end of the drive rod away from the T-shaped shaft.

[0010] Preferably, a rotating rod is rotatably mounted on the side end face of the supporting plate and below the rotating shaft. A connecting gear and a main bevel gear are fixedly mounted on the rotating rod. A vertical rotating rod is rotatably mounted on the support platform. A driven bevel gear is fixedly mounted on the side end face of the vertical rotating rod. A stabilizing plate is fixedly mounted on the support platform and on one side of the vertical rotating rod.

[0011] Preferably, the main bevel gear is located on one side of the connecting gear, the end of the drive crossbar away from the drive rod is fixedly installed with the welder, the intermittent gear intermittently meshes with the rotating gear and the connecting gear, the main bevel gear meshes with the driven bevel gear, and the rotating rod is rotatably installed with the stabilizing plate.

[0012] Preferably, the auxiliary component includes a push rod fixedly mounted on the sliding connecting rod, a U-shaped fixed rod fixedly mounted on the side end face of the support rod, a mounting plate slidably mounted on the U-shaped fixed rod, a pressure inclined plate fixedly mounted on the upper end face of the mounting plate, a rotating groove formed on the inner side of the mounting plate, a reciprocating rod rotatably mounted on the rotating groove, a pressure rod fixedly mounted on the reciprocating rod, a torsion spring fixedly connected to the side end face of the pressure rod, a positioning rod fixedly mounted on the side end face of the mounting plate, a connecting spring fixedly connected to the side end face of the mounting plate, and a pushing pressure rod fixedly mounted on the lower end face of the welder.

[0013] Preferably, the lower push rod is positioned directly above the pressure inclined plate, the end of the torsion spring away from the lower push rod is fixedly connected to the inside of the rotating groove, the torsion spring is positioned outside the reciprocating rod, the bottom end of the positioning rod contacts the upper end face of the lower push rod, and the end of the connecting spring away from the mounting plate is fixedly connected to the support rod.

[0014] Preferably, the positioning component includes a U-shaped fixed frame fixedly installed on the workbench, a sliding rod slidably installed on the U-shaped fixed frame, an arc-shaped clamping block fixedly installed at the end of the sliding rod away from the U-shaped fixed frame, a limit spring fixedly installed on the arc-shaped clamping block, and a reciprocating thread on the rotating rod.

[0015] Preferably, the rotating rod is movably mounted with a reciprocating slider via a reciprocating thread, a crescent pin is movably mounted on the reciprocating slider, a limit slide rod is fixedly mounted on the lower end face of the reciprocating slider, a positioning push rod is fixedly mounted on the upper end face of the reciprocating slider, and a limit slide groove is formed on the upper end face of the worktable.

[0016] Preferably, the limiting slide rod is slidably installed with the limiting slide groove, the positioning push rod is located on the outside of the worktable, and the end of the positioning push rod is in sliding contact with the side end face of the arc-shaped clamping block.

[0017] The method for laser welding the tabs of lithium batteries, based on the laser welding equipment for lithium battery tabs described above, includes the following steps:

[0018] S1. Pull the arc-shaped clamping block and use the reaction force of the limit spring to fix the lithium battery body to be welded in the U-shaped frame of the worktable. The drive motor drives the intermittent gear on the drive shaft to rotate. The intermittent gear meshes with the rotating gear, and the rotating gear drives the drive rod to move through the T-shaped shaft. Through the cooperation of the drive rod and the drive crossbar, as well as the limit of the sliding connecting rod and the lifting groove, the welder is driven to complete a lifting motion. The laser welding head on the welder is used to complete the welding between the lithium battery body and the tab body.

[0019] S2. When the intermittent gear rotates continuously, it will disengage from the rotating gear and engage with the connecting gear. When the connecting gear rotates, it will drive the main bevel gear on the rotating rod to rotate. By utilizing the cooperation between the main bevel gear and the driven bevel gear, the driven bevel gear will drive the worktable to rotate 90 degrees through the vertical rotating rod. Through the movement of the structure, the welded lithium battery body can be rotated to one side, and the unwelded lithium battery body can be rotated to the bottom of the laser welding head. Through the design of the structure, the welding efficiency of the lithium battery body can be effectively improved.

[0020] S3. When the rotating rod rotates, it will drive the reciprocating slider to complete a reciprocating motion through the reciprocating thread, the limiting slide rod, and the limiting slide groove. When the lithium battery body is below the laser welding head, the positioning push rod on the reciprocating slider slides into contact with the arc-shaped clamp. When the arc-shaped clamp is squeezed, it will directly position the lithium battery body in the U-shaped frame. Through the structure, the lithium battery body cannot be positioned by the arc-shaped clamp due to the reaction force of the limiting spring, which effectively improves the stability of the lithium battery body and the tab body during welding.

[0021] S4. As the sliding connecting rod descends, it will drive the lower push rod to descend synchronously. Through the cooperation of the lower push rod and the pressure inclined plate, the mounting plate will move inward through the limit of the U-shaped fixed rod. When it moves to the appropriate position, the push rod on the welding machine will push the lower pressure rod. When the lower pressure rod is pushed, it will rotate around the reciprocating rod. The tail end of the lower pressure rod is used to complete the downward sliding fixation of the electrode body, ensuring the contact effect and stability of the lithium battery body and the electrode body before welding, and improving the welding effect between the two.

[0022] This invention provides a laser welding device and operating method for lithium battery tabs. Compared with the prior art, it has the following advantages:

[0023] 1. This invention uses a drive motor to drive an intermittent gear on a drive shaft to rotate. The intermittent gear meshes with a rotating gear, which in turn drives a drive rod via a T-shaped shaft. The drive rod, in conjunction with a drive crossbar and the limiting mechanism of the sliding connecting rod and the lifting groove, drives the welder to complete a lifting motion. The laser welding head on the welder is used to weld the lithium battery body and the tab body. When the intermittent gear rotates continuously, it disengages from the rotating gear and engages with a connecting gear. The connecting gear, when rotating, drives the main bevel gear on the rotating rod to rotate. The main bevel gear meshes with the driven bevel gear, which in turn drives the worktable to rotate 90 degrees via a vertical rotating rod. Through the movement of the structure, the welded lithium battery body 4 can be rotated to one side, and the unwelded lithium battery body 4 can be rotated below the laser welding head. The structure effectively improves the welding efficiency of the lithium battery body.

[0024] 2. In this invention, as the sliding connecting rod descends, it drives the lower push rod to descend synchronously. Through the cooperation of the lower push rod and the pressure inclined plate, the mounting plate will move inward by the limit of the U-shaped fixed rod. When it moves to the appropriate position, the pushing pressure rod on the welding machine will push the lower pressure rod. When the lower pressure rod is pushed, it will rotate around the reciprocating rod. The tail end of the lower pressure rod is used to complete the downward sliding fixation of the electrode body, ensuring that the lithium battery body and the electrode body can be fully contacted before welding, thus improving the welding effect between the two.

[0025] 3. In this invention, when the rotating rod rotates, it drives the reciprocating slider to complete a reciprocating motion through the reciprocating thread, the limiting slide rod, and the limiting slide groove. When the lithium battery body is below the laser welding head, the positioning push rod on the reciprocating slider slides into contact with the arc-shaped clamping block. When the arc-shaped clamping block is squeezed, it directly positions the lithium battery body within the U-shaped frame. Through the structural design, the lithium battery body is prevented from being unable to be positioned by the arc-shaped clamping block due to the reaction force of the limiting spring, effectively improving the stability of the lithium battery body and the tab body during welding.

[0026] 4. This invention achieves efficient and stable welding of the lithium battery body and the electrode body by using the positioning component, driving component and auxiliary component in combination, ensuring that the lithium battery body and the electrode body are in complete contact before welding, improving welding quality and efficiency, and greatly improving the use effect of the welding equipment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the support platform in this invention;

[0029] Figure 3 This is a schematic diagram of the limiting slide bar in this invention;

[0030] Figure 4 This is a schematic diagram of the drive rod structure in this invention;

[0031] Figure 5 This is a schematic diagram of the positioning push rod in this invention;

[0032] Figure 6 This is a schematic diagram of the auxiliary component in this invention;

[0033] Figure 7 This is a cross-sectional view of the mounting plate in this invention;

[0034] Figure 8 This is a schematic diagram of the square frame structure in this invention.

[0035] In the diagram: 1. Equipment base; 2. Support platform; 3. Workbench; 4. Lithium battery body; 5. Electrode body; 6. Support plate; 7. Support rod; 8. Lifting groove; 9. Sliding connecting rod; 10. Welder; 11. Laser welding head; 12. Drive motor; 13. Drive shaft; 14. Intermittent gear; 15. Rotating shaft; 16. Rotating gear; 17. T-shaft; 18. Drive rod; 19. Drive crossbar; 20. Rotating rod; 21. Linkage gear; 22. Main bevel gear; 23. Vertical rotating rod; 24. From the following components: 25. Bevel gear; 26. Stabilizing plate; 27. Lower push rod; 28. U-shaped fixed rod; 29. ​​Mounting frame plate; 30. Pressure inclined plate; 31. Rotating groove; 32. Reciprocating rod; 33. Lower pressure rod; 34. Torsion spring; 35. Positioning rod; 36. Connecting spring; 37. U-shaped fixed frame; 38. Sliding rod; 39. Arc-shaped clamp; 40. Reciprocating thread; 41. Reciprocating slider; 42. Crescent pin; 43. Limiting slide rod; 44. Positioning push rod; 45. Limiting slide groove; 46. Limiting spring; 47. Pushing pressure rod. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1-8 This invention relates to a laser welding device for lithium battery tabs, comprising a base 1, a support platform 2 fixedly mounted on the base 1, a worktable 3 rotatably mounted on the support platform 2, a positioning component on the worktable 3, a lithium battery body 4 mounted on the positioning component, tab bodies 5 adhesively connected to the lithium battery body 4, a support plate 6 fixedly mounted on the base 1 and on one side of the support platform 2, a drive component mounted on the support plate 6, symmetrically arranged support rods 7 on the drive component, lifting grooves 8 formed on the support rods 7, and sliding connectors slidably mounted on the lifting grooves 8. A welding device 10 is fixedly mounted on the sliding connecting rod 9, and a laser welding head 11 is fixedly mounted on the welding device 10. The drive assembly includes a drive motor 12 fixedly mounted on the support plate 6, a drive shaft 13 fixedly mounted on the output end of the drive motor 12, an intermittent gear 14 fixedly mounted on the drive shaft 13, a rotating shaft 15 rotatably mounted on the side end face of the support plate 6, a rotating gear 16 fixedly mounted on the rotating shaft 15, a T-shaped shaft 17 fixedly mounted on the side end face of the rotating gear 16, and a drive rod 18 rotatably mounted on the T-shaped shaft 17, with the drive rod 18 located away from the T-shaped shaft. One end of the 17 is rotatably mounted with a drive crossbar 19. A rotating rod 20 is rotatably mounted on the side end face of the supporting plate 6 and below the rotating shaft 15. A connecting gear 21 and a main bevel gear 22 are fixedly mounted on the rotating rod 20. A vertical rotating rod 23 is rotatably mounted on the support platform 2. A secondary bevel gear 24 is fixedly mounted on the side end face of the vertical rotating rod 23. A stabilizing plate 25 is fixedly mounted on the support platform 2 and on one side of the vertical rotating rod 23. The main bevel gear 22 is located on one side of the connecting gear 21. The end of the drive crossbar 19 away from the drive rod 18 is fixedly mounted to the welder 10. An intermittent gear 14... The intermittent gear 14 meshes with the rotating gear 16 and the connecting gear 21, the main bevel gear 22 meshes with the driven bevel gear 24, and the rotating rod 20 is rotatably mounted with the stabilizing plate 25. The welding device 10 and laser welding are technologies well known to those skilled in the art, and will not be described in detail here. The intermittent gear 14 and the rotating gear 16 are both located on the front side of the supporting plate 6 to ensure that the intermittent gear 14 and the rotating gear 16 can mesh. At the same time, the stabilizing plate 25 is located below the worktable 3. Through the action of the stabilizing plate 25, the stability of the rotating rod 20 during rotation is ensured.

[0038] In this embodiment, the intermittent gear 14 on the drive shaft 13 is rotated by the drive motor 12. The intermittent gear 14 meshes with the rotating gear 16, which in turn drives the drive rod 18 via the T-shaped shaft 17. The drive rod 18 engages with the drive crossbar 19, and the sliding connecting rod 9 and the lifting groove 8 limit the movement, thereby driving the welder 10 to complete a lifting motion. The laser welding head 11 on the welder 10 then completes the welding between the lithium battery body 4 and the electrode body 5. As the intermittent gear 14 continues to rotate... Disengaging from the rotating gear 16, it simultaneously engages with the connecting gear 21. When the connecting gear 21 rotates, it drives the main bevel gear 22 on the rotating rod 20 to rotate. Utilizing the cooperation between the main bevel gear 22 and the driven bevel gear 24, the driven bevel gear 24 drives the worktable 3 to rotate 90 degrees via the vertical rotating rod 23. Through the movement of the structure, the welded lithium battery body 4 can be rotated to one side, and the unwelded lithium battery body 4 can be rotated to below the laser welding head 11. Through the design of the structure, the welding efficiency of the lithium battery body 4 can be effectively improved.

[0039] Auxiliary components are provided on the two support rods 7. These components include a push rod 26 fixedly mounted on a sliding connecting rod 9. A U-shaped fixed rod 27 is fixedly mounted on the side end face of the support rod 7. A mounting plate 28 is slidably mounted on the U-shaped fixed rod 27. A pressure-bearing inclined plate 29 is fixedly mounted on the upper end face of the mounting plate 28. A rotating groove 30 is formed on the inner side of the mounting plate 28. A reciprocating rod 31 is rotatably mounted on the rotating groove 30. A pressing rod 32 is fixedly mounted on the reciprocating rod 31. A torsion spring 33 is fixedly connected to the side end face of the pressing rod 32. A positioning rod 34 is fixedly mounted on the side end face of the mounting plate 28. A connecting spring 35 is fixedly connected to the side end face of the mounting plate 28. Welder 1 A push rod 46 is fixedly installed on the lower end face of the welder 10. The position of the push rod 26 is directly above the pressure plate 29. The end of the torsion spring 33 away from the push rod 32 is fixedly connected to the inside of the rotating groove 30. The position of the torsion spring 33 is outside the reciprocating rod 31. The bottom end of the positioning rod 34 contacts the upper end face of the push rod 32. The end of the connecting spring 35 away from the mounting plate 28 is fixedly connected to the support rod 7. When the welder 10 is raised, the pressure plate 29 that is not compressed will drive the mounting plate 28 to return to its original position through the elastic force of the connecting spring 35. At the same time, the push rod 32 will return to its original position through the torsion force of the torsion spring 33, so that it contacts the positioning rod 34.

[0040] In this embodiment, as the sliding connecting rod 9 descends, it drives the lower push rod 26 to descend synchronously. Through the cooperation of the lower push rod 26 and the pressure inclined plate 29, the mounting plate 28 will move inward through the limitation of the U-shaped fixed rod 27. When it moves to the appropriate position, the pushing pressure rod 46 on the welder 10 will push the lower pressure rod 32. When the lower pressure rod 32 is pushed, it will rotate around the reciprocating rod 31. The tail end of the lower pressure rod 32 is used to complete the downward sliding fixation of the tab body 5, ensuring the contact effect and stability of the lithium battery body 4 and the tab body 5 before welding, and improving the welding effect between the two.

[0041] The positioning assembly includes a U-shaped fixed frame 36 fixedly mounted on the worktable 3, a sliding rod 37 slidably mounted on the U-shaped fixed rod 27, an arc-shaped clamping block 38 fixedly mounted on the end of the sliding rod 37 away from the U-shaped fixed frame 36, a limit spring 45 fixedly mounted on the arc-shaped clamping block 38, a reciprocating thread 39 on the rotating rod 20, a reciprocating slider 40 movably mounted on the rotating rod 20 via the reciprocating thread 39, a crescent pin 41 movably mounted on the reciprocating slider 40, a limit sliding rod 42 fixedly mounted on the lower end face of the reciprocating slider 40, a positioning push rod 43 fixedly mounted on the upper end face of the reciprocating slider 40, and a positioning push rod 43 fixedly mounted on the upper end face of the worktable 3. A limiting slide groove 44 is provided, and the limiting slide rod 42 is slidably installed with the limiting slide groove 44. The positioning push rod 43 is located on the outside of the worktable 3. The end of the positioning push rod 43 is in sliding contact with the side end face of the arc-shaped clamping block 38. The initial position of the positioning push rod 43 is close to the worktable 3. When the rotating rod 20 rotates, the positioning push rod 43 will complete a reciprocating motion through the reciprocating slider 40. During the return stroke, it will contact the arc-shaped clamping block 38. Through this close contact, it is ensured that the positioning push rod 43 can apply a uniform force to the arc-shaped clamping block 38, ensuring the positioning of the lithium battery by the arc-shaped clamping block 38.

[0042] In this embodiment, when the rotating rod 20 rotates, it will drive the reciprocating slider 40 to complete a reciprocating motion through the reciprocating thread 39, the limiting slide rod 42, and the limiting slide groove 44. When the lithium battery body 4 is below the laser welding head 11, the positioning push rod 43 on the reciprocating slider 40 slides in contact with the arc-shaped clamp 38. When the arc-shaped clamp 38 is squeezed, it will directly position the lithium battery body 4 in the U-shaped frame 36. Through the structure, the lithium battery body 4 is not unable to be positioned by the arc-shaped clamp 38 due to the reaction force of the limiting spring 45, which effectively improves the stability of the lithium battery body 4 and the tab body 5 during welding.

[0043] The method for laser welding the tabs of lithium batteries, based on the laser welding equipment for lithium battery tabs described above, includes the following steps:

[0044] S1. Pull the arc-shaped clamp 38 and use the reaction force of the limit spring 45 to fix the lithium battery body 4 to be welded in the U-shaped frame 36 of the workbench 3. Drive the intermittent gear 14 on the drive shaft 13 to rotate through the drive motor 12. The intermittent gear 14 meshes with the rotating gear 16. The rotating gear 16 will drive the drive rod 18 to move through the T-shaped shaft 17. Through the cooperation of the drive rod 18 and the drive crossbar 19, and the limit of the sliding connecting rod 9 and the lifting groove 8, the welder 10 is driven to complete a lifting motion. The laser welding head 11 on the welder 10 is used to complete the welding between the lithium battery body 4 and the tab body 5.

[0045] S2. When the intermittent gear 14 rotates continuously, it will disengage from the rotating gear 16 and engage with the connecting gear 21. When the connecting gear 21 rotates, it will drive the main bevel gear 22 on the rotating rod 20 to rotate. With the cooperation of the main bevel gear 22 and the driven bevel gear 24, the driven bevel gear 24 will drive the worktable 3 to rotate 90 degrees through the vertical rotating rod 23. Through the movement of the structure, the welded lithium battery body 4 can be rotated to one side, and the unwelded lithium battery body 4 can be rotated to the bottom of the laser welding head 11. Through the design of the structure, the welding efficiency of the lithium battery body 4 can be effectively improved.

[0046] S3. When the rotating rod 20 rotates, it will drive the reciprocating slider 40 to complete a reciprocating motion through the reciprocating thread 39, the limiting slide rod 42, and the limiting slide groove 44. When the lithium battery body 4 is below the laser welding head 11, the positioning push rod 43 on the reciprocating slider 40 slides in contact with the arc-shaped clamp 38. When the arc-shaped clamp 38 is squeezed, it will directly position the lithium battery body 4 in the U-shaped frame 36. Through the structure, the lithium battery body 4 cannot be positioned by the arc-shaped clamp 38 due to the reaction force of the limiting spring 45, which effectively improves the stability of the lithium battery body 4 and the tab body 5 during welding.

[0047] S4. As the sliding connecting rod 9 descends, it will drive the lower push rod 26 to descend synchronously. Through the cooperation of the lower push rod 26 and the pressure inclined plate 29, the mounting plate 28 will move inward through the limit of the U-shaped fixed rod 27. When it moves to the appropriate position, the pushing pressure rod 46 on the welding machine 10 will push the lower pressure rod 32. When the lower pressure rod 32 is pushed, it will rotate around the reciprocating rod 31. The tail end of the lower pressure rod 32 will be used to complete the downward sliding fixation of the tab body 5, ensuring the contact effect and stability of the lithium battery body 4 and the tab body 5 before welding, and improving the welding effect between the two.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A laser welding device for the tabs of lithium batteries, comprising a device base (1), characterized in that: A support platform (2) is fixedly installed on the equipment base (1), and a workbench (3) is rotatably installed on the support platform (2). A positioning component is provided on the workbench (3), and a lithium battery body (4) is provided on the positioning component. A tab body (5) is adhesively connected to the lithium battery body (4). A support plate (6) is fixedly installed on the equipment base (1) and on one side of the support platform (2). A drive assembly is provided on the support plate (6). A symmetrically arranged support rod (7) is provided on the drive assembly. A lifting groove (8) is provided on the support rod (7). A sliding connecting rod (9) is slidably installed on the lifting groove (8). A welder (10) is fixedly installed on the sliding connecting rod (9). A laser welding head (11) is fixedly installed on the welder (10). Auxiliary components are provided on the two support rods (7).

2. The lithium battery electrode laser welding equipment according to claim 1, characterized in that: The drive assembly includes a drive motor (12) fixedly mounted on a support plate (6), a drive shaft (13) fixedly mounted on the output end of the drive motor (12), an intermittent gear (14) fixedly mounted on the drive shaft (13), a rotating shaft (15) rotatably mounted on the side end face of the support plate (6), a rotating gear (16) fixedly mounted on the rotating shaft (15), a T-shaped shaft (17) fixedly mounted on the side end face of the rotating gear (16), a drive rod (18) rotatably mounted on the T-shaped shaft (17), and a drive crossbar (19) rotatably mounted on the end of the drive rod (18) away from the T-shaped shaft (17).

3. The lithium battery electrode laser welding equipment according to claim 2, characterized in that: A rotating rod (20) is rotatably mounted on the side end face of the supporting plate (6) and below the rotating shaft (15). A connecting gear (21) and a main bevel gear (22) are fixedly mounted on the rotating rod (20). A vertical rotating rod (23) is rotatably mounted on the support platform (2). A secondary bevel gear (24) is fixedly mounted on the side end face of the vertical rotating rod (23). A stabilizing plate (25) is fixedly mounted on the support platform (2) and on one side of the vertical rotating rod (23).

4. The lithium battery electrode laser welding equipment according to claim 3, characterized in that: The main bevel gear (22) is located on one side of the connecting gear (21), the end of the drive crossbar (19) away from the drive rod (18) is fixedly installed with the welder (10), the intermittent gear (14) intermittently meshes with the rotating gear (16) and the connecting gear (21), the main bevel gear (22) meshes with the driven bevel gear (24), and the rotating rod (20) is rotatably installed with the stabilizing plate (25).

5. The lithium battery electrode laser welding equipment according to claim 3, characterized in that: The auxiliary components include a push rod (26) fixedly mounted on a sliding connecting rod (9), a U-shaped fixed rod (27) fixedly mounted on the side end face of the support rod (7), a mounting plate (28) slidably mounted on the U-shaped fixed rod (27), a pressure inclined plate (29) fixedly mounted on the upper end face of the mounting plate (28), a rotating groove (30) opened on the inner side of the mounting plate (28), a reciprocating rod (31) rotatably mounted on the rotating groove (30), a pressing rod (32) fixedly mounted on the reciprocating rod (31), a torsion spring (33) fixedly connected to the side end face of the pressing rod (32), a positioning rod (34) fixedly mounted on the side end face of the mounting plate (28), a connecting spring (35) fixedly connected to the side end face of the mounting plate (28), and a pushing pressure rod (46) fixedly mounted on the lower end face of the welder (10).

6. The lithium battery electrode laser welding equipment according to claim 5, characterized in that: The lower push rod (26) is positioned directly above the pressure inclined plate (29). The end of the torsion spring (33) away from the lower pressure rod (32) is fixedly connected to the inside of the rotating groove (30). The torsion spring (33) is positioned outside the reciprocating rod (31). The bottom end of the positioning rod (34) is in contact with the upper end face of the lower pressure rod (32). The end of the connecting spring (35) away from the mounting plate (28) is fixedly connected to the support rod (7).

7. The lithium battery electrode laser welding equipment according to claim 5, characterized in that: The positioning assembly includes a U-shaped fixed frame (36) fixedly installed on the workbench (3), a sliding rod (37) slidably installed on the U-shaped fixed rod (27), an arc-shaped clamping block (38) fixedly installed at the end of the sliding rod (37) away from the U-shaped fixed frame (36), a limit spring (45) fixedly installed on the arc-shaped clamping block (38), and a reciprocating thread (39) opened on the rotating rod (20).

8. The lithium battery electrode laser welding equipment according to claim 7, characterized in that: The rotating rod (20) is movably mounted with a reciprocating slider (40) via a reciprocating thread (39). A crescent pin (41) is movably mounted on the reciprocating slider (40). A limit slide rod (42) is fixedly mounted on the lower end face of the reciprocating slider (40). A positioning push rod (43) is fixedly mounted on the upper end face of the reciprocating slider (40). A limit slide groove (44) is opened on the upper end face of the worktable (3).

9. The lithium battery electrode laser welding equipment according to claim 8, characterized in that: The limiting slide rod (42) is slidably installed with the limiting slide groove (44), the positioning push rod (43) is located on the outside of the workbench (3), and the end of the positioning push rod (43) slides in contact with the side end face of the arc-shaped clamp (38).

10. A method for laser welding the tabs of a lithium battery, based on the laser welding equipment for the tabs of a lithium battery according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Pull the arc-shaped clamp (38) and use the reaction force of the limiting spring (45) to fix the lithium battery body (4) to be welded in the U-shaped frame (36) of the workbench (3). Drive the intermittent gear (14) on the drive shaft (13) to rotate through the drive motor (12). Utilize the meshing of the intermittent gear (14) and the rotating gear (16). The rotating gear (16) will drive the drive rod (18) to move through the T-shaped shaft (17). Through the cooperation of the drive rod (18) and the drive crossbar (19), and the limiting of the sliding connecting rod (9) and the lifting groove (8), the welding machine (10) is driven to complete a lifting motion. Utilize the laser welding head (11) on the welding machine (10) to complete the welding between the lithium battery body (4) and the tab body (5). S2. When the intermittent gear (14) rotates continuously, it will disengage from the rotating gear (16) and engage with the connecting gear (21). When the connecting gear (21) rotates, it will drive the main bevel gear (22) on the rotating rod (20) to rotate. With the cooperation of the main bevel gear (22) and the driven bevel gear (24), the driven bevel gear (24) will drive the worktable (3) to rotate ninety degrees through the vertical rotating rod (23). Through the movement of the structure, the welded lithium battery body (4) can be rotated to one side, and the unwelded lithium battery body (4) can be rotated to the bottom of the laser welding head (11). Through the setting of the structure, the welding efficiency of the lithium battery body (4) can be effectively improved. S3. When the rotating rod (20) rotates, it will drive the reciprocating slider (40) to complete a reciprocating motion through the reciprocating thread (39), the limiting slide rod (42), and the limiting slide groove (44). When the lithium battery body (4) is below the laser welding head (11), the positioning push rod (43) on the reciprocating slider (40) slides into contact with the arc-shaped clamp (38). When the arc-shaped clamp (38) is squeezed, it will directly position the lithium battery body (4) in the U-shaped frame (36). Through the structure, the lithium battery body (4) cannot be positioned by the arc-shaped clamp (38) due to the reaction force of the limiting spring (45), which effectively improves the stability of the lithium battery body (4) and the tab body (5) during welding. S4. When the sliding rod (9) descends, it will drive the lower push rod (26) to descend synchronously. Through the cooperation of the lower push rod (26) and the pressure inclined plate (29), the mounting plate (28) will move inward through the limit of the U-shaped fixed rod (27). When it moves to the appropriate position, the push rod (46) on the welder (10) will push the lower pressure rod (32). When the lower pressure rod (32) is pushed, it will rotate around the reciprocating rod (31). The tail end of the lower pressure rod (32) will be used to complete the downward sliding fixation of the tab body (5), ensuring the contact effect and stability of the lithium battery body (4) and the tab body (5) before welding, and improving the welding effect between the two.

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