A laser welding tab apparatus for battery processing

Abstract

The application relates to the technical field of laser welding, in particular to a laser welding tab device for battery processing, which comprises a supporting table and a laser welding mechanism, the laser welding mechanism is installed on the supporting table, and a pressing mechanism is installed on the laser welding mechanism; a dust suction mechanism for dust suction is installed on the pressing mechanism; the pressing mechanism comprises a pressing assembly, a driving assembly, a pulling assembly, a rolling assembly and a limiting unit; the pressing assembly is installed on the driving end of the laser welding mechanism and is used for pressing tabs; the driving assembly is installed on the pressing assembly and is used for driving the pulling assembly; the pulling assembly is installed on the driving end of the driving assembly and is used for driving the rolling assembly to move; the laser generated by the laser welding part of the application moves along with the pressing roller, and the overlapping tabs are uniformly welded together, so that the area which has not been pressed can be pressed by the pressing roller, and the overlapping tabs are tightly attached.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and more specifically to a laser welding device for battery processing. Background Technology

[0002] After some pouch batteries and prismatic batteries are manufactured, the tabs on these batteries are rectangular, flexible, flat sheets of metal. The batteries are placed one by one, and then the tabs of these batteries are stacked together. Then, a laser welding device is used to weld the overlapping tabs together.

[0003] Chinese patent document CN221019156U discloses a laser welding device and laser welding equipment. The laser welding device includes a galvanometer assembly and an air knife assembly. The galvanometer assembly is used to emit a laser beam to perform laser welding on the workpiece in the welding area, and the galvanometer assembly includes a protective lens. The air knife assembly is located between the galvanometer assembly and the welding area, and the air knife assembly includes a first air knife and a second air knife. The air outlet of the first air knife faces the welding area, and the air outlet of the second air knife faces the protective lens. The above-mentioned prior art laser welding device can change the movement trajectory of the welding slag by the air knife assembly, thereby reducing the possibility of welding slag adhering to the protective lens, and also reducing the possibility of dust, fibers and other impurities in the air adhering to the protective lens, thereby improving the cleanliness of the protective lens, reducing the probability of laser beam obstruction, and improving welding quality. The laser welding equipment of the present application embodiment has high welding quality and good reliability.

[0004] However, existing laser welding tab equipment uses a frame-shaped pressing component to press the overlapping tabs during welding, so that the tabs can overlap tightly. However, the pressing component is still frame-shaped. Although it can press the tabs from the periphery of the welding point, the middle of the frame-shaped component is hollow, which means that the tabs in this part may still bounce back due to their own elasticity. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background art by proposing a laser welding device for battery processing.

[0006] The technical solution of this invention: A laser welding device for battery processing includes a support platform and a laser welding mechanism. The laser welding mechanism is mounted on the support platform, and a pressing mechanism is mounted on the laser welding mechanism. A dust suction mechanism is mounted on the pressing mechanism and is used for dust removal. The pressing mechanism includes a pressing component, a driving component, a pulling component, a rolling component, and a limiting unit. The pressing component is mounted on the driving end of the laser welding mechanism and is used to press the electrode tab. The driving component is mounted on the pressing component and is used to drive the pulling component. The pulling component is mounted on the driving end of the driving component and is used to drive the rolling component to move. The rolling component is installed inside the pulling component and is used to roll the electrode tab. The limiting unit is installed inside the pressing component and is used to press the electrode tab. The laser welding mechanism drives the pressing component to press the electrode tab, and the driving component drives the pulling component to drive the rolling component to press the electrode tab tightly.

[0007] Preferably, the pressing assembly includes a support plate and a pressing frame; the support plate is mounted on the drive end of the laser welding mechanism; the pressing frame is mounted on the support plate and is used to press the electrode tabs.

[0008] Preferably, the drive assembly includes a Z-shaped plate, a drive device four, and a take-up drum; the Z-shaped plate is mounted on a support plate; the drive device four is mounted on the Z-shaped plate; the take-up drum is rotatably connected inside the Z-shaped plate and mounted on the output shaft of the drive device four.

[0009] Preferably, the pulling assembly includes a pull rope, a limiting rod, a limiting part, a moving part, and an elastic unit; the two ends of the pull rope are respectively connected to a take-up drum and the moving part; the limiting rod is mounted on a support plate, the limiting part is mounted on a pressing frame, and the limiting rod and the limiting part limit the pull rope; the moving part is slidably connected inside the pressing frame; the elastic unit is installed inside the pressing frame.

[0010] Preferably, the elastic unit includes a round rod and a spring; the round rod is installed inside the pressing frame; the two ends of the spring are respectively connected to the inner wall of the pressing frame and the moving part.

[0011] Preferably, the rolling assembly includes a threaded rod, a lifting plate, an elastic element, a pressure roller, and a rotating part; the lifting plate is slidably connected within the moving part; the two ends of the elastic element are respectively connected to the lifting plate and the pressure roller; the threaded rod is rotatably connected within the moving part, and the lifting plate and the threaded rod are threadedly engaged; the rotating part is installed on the top of the threaded rod.

[0012] Preferably, the limiting unit includes an elastic element two and a pressing part; the two ends of the elastic element two are respectively connected to the inner wall of the pressing frame and the pressing part.

[0013] Preferably, the dust collection mechanism includes a connecting part, a telescopic tube, and a dust collection part; the connecting part is installed on the pressing frame, and the two ends of the telescopic tube are respectively connected to the connecting part and the dust collection part; the dust collection part is installed inside the moving part.

[0014] Preferably, the laser welding mechanism includes a first driving device, a second driving device, a third driving device, and a laser welding unit; the first driving device is mounted on a support platform; the second driving device is mounted on the first driving device and is used to drive the third driving device to move; the third driving device is mounted on the second driving device and is used to drive the support plate to move; the laser welding unit is mounted on the first driving device and is used for laser welding.

[0015] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects: The battery is placed on the support platform, and the battery tabs are overlapped. Then, drive device one and drive device three are activated to drive the pressing frame to press onto the battery tabs. At this time, the pressing part first presses one end of the tab, and the elasticity provided by elastic element two allows the pressing part to press firmly. At the same time, the pressing roller also presses on top of the tab. Then, drive device four is activated to drive the take-up drum to rotate, thereby pulling the pull rope and moving the moving part and pressing roller along the pressing frame. The pressing roller powerfully rolls and presses the tab. Then, the laser generated by the laser welding part follows the movement of the pressing roller, evenly welding the overlapping tabs together. Thus, the pressing roller can powerfully press the areas that are not pressed, making the overlapping tabs fit tightly.

[0016] Depending on the type of electrode tab, the rotating part can be rotated to drive the threaded rod to rotate, which in turn drives the lifting plate that is threaded to move along the threaded rod. This causes the elastic element and the pressure roller to descend, and when the subsequent pressure roller presses on the electrode tab, the pressure applied by the elastic element to the pressure roller increases, so that some electrode tabs with greater elasticity can also be pressed and deformed.

[0017] Connect the suction pipe of the vacuum cleaner to the connecting part, and connect the two ends of the telescopic tube to the connecting part and the suction part respectively; then start the vacuum cleaner. When the moving part drives the pressing roller to move along the pressing frame, the laser welding point also moves with the pressing roller. At this time, the suction part is very close to the laser welding point, so that the suction part sucks in the generated debris, preventing these micro dusts from floating to the laser welding point. This achieves precise removal of micro dust with only a small suction force. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the pressing frame proposed in this invention; Figure 3 This is a schematic diagram of the rotating part proposed in this invention; Figure 4 This is a schematic diagram of the telescopic tube proposed in this invention; Figure 5 This is a schematic diagram of the structure of the pressing part proposed in this invention; Figure 6 This is a side view of the battery tabs of the present invention; Figure 7 This is a top view schematic diagram of the battery tabs of the present invention; Reference numerals: 1. Support platform; 2. Drive device one; 3. Drive device two; 4. Drive device three; 5. Laser welding part; 6. Support plate; 7. Z-shaped plate; 8. Drive device four; 9. Take-up drum; 10. Pull rope; 11. Limiting rod; 12. Limiting part; 13. Pressing frame; 14. Round rod; 15. Spring one; 16. Moving part; 17. Threaded rod; 18. Lifting plate; 19. Elastic element one; 20. Pressing roller; 21. Rotating part; 22. Elastic element two; 23. Pressing part; 24. Connecting part; 25. Telescopic tube; 26. Dust collection part. Detailed Implementation

[0019] Example 1, as Figures 1-7 As shown, the present invention proposes a laser welding device for battery processing, comprising a support platform 1 and a laser welding mechanism. The laser welding mechanism is mounted on the support platform 1, and a pressing mechanism is mounted on the laser welding mechanism. A dust suction mechanism is mounted on the pressing mechanism for dust removal. The pressing mechanism includes a pressing component, a driving component, a pulling component, a rolling component, and a limiting unit. The pressing component is mounted on the driving end of the laser welding mechanism and is used to press the electrode tab. The driving component is mounted on the pressing component and is used to drive the pulling component. The pulling component is mounted on the driving end of the driving component and is used to drive the rolling component to move. The rolling component is mounted inside the pulling component and is used to roll the electrode tab. The limiting unit is mounted inside the pressing component and is used to press the electrode tab. The laser welding mechanism drives the pressing component to press the electrode tab, and the driving component drives the pulling component to drive the rolling component to press the electrode tab tightly.

[0020] Drive device 1 (2) and drive device 2 (3) can be cylinders or lead screw assemblies; drive device 3 (4) can be cylinders; drive device 4 (8) can be motors; elastic element 1 (19) and elastic element 2 (22) are both composed of spring 2 and telescopic rod; The pressing assembly includes a support plate 6 and a pressing frame 13; the support plate 6 is installed on the drive end of the laser welding mechanism; the pressing frame 13 is installed on the support plate 6 and is used to press the electrode tabs; the second driving device 3 drives the third driving device 4 to lift and lower, thereby driving the pressing frame 13 to lift and lower, and the third driving device 4 drives the pressing frame 13 to move horizontally, thus realizing the lifting and lowering and horizontal movement of the pressing frame 13.

[0021] The drive assembly includes a Z-shaped plate 7, a drive device 4 8, and a take-up drum 9. The Z-shaped plate 7 is mounted on the support plate 6. The drive device 4 8 is mounted on the Z-shaped plate 7. The take-up drum 9 is rotatably connected inside the Z-shaped plate 7 and mounted on the output shaft of the drive device 4 8. When the drive device 4 8 is started, it drives the take-up drum 9 to rotate, thereby pulling the pull rope 10. Then, the pull rope 10 pulls the moving part 16 to move along the round rod 14. After the laser welding is completed, the pressure roller 20 is separated from the battery. The drive device 4 8 is started to drive the take-up drum 9 to reverse. Then, the elasticity of the spring 15 drives the moving part 16 to move along the round rod 14, so that the pull rope 10 is released again.

[0022] The pulling assembly includes a pull rope 10, a limiting rod 11, a limiting part 12, a moving part 16, and an elastic unit. The two ends of the pull rope 10 are connected to the take-up drum 9 and the moving part 16, respectively. The limiting rod 11 is mounted on the support plate 6, and the limiting part 12 is mounted on the pressing frame 13. The limiting rod 11 and the limiting part 12 limit the pull rope 10. The moving part 16 is slidably connected inside the pressing frame 13. The elastic unit is installed inside the pressing frame 13. The moving part 16 is sleeved on the round rod 14. When the pressing roller 20 is driven by the pressing frame 13 to press against the electrode tab, the pressing roller 20 rises, causing the elastic element 19 to be compressed. The counter-thrust provided by the elastic element 19 can also drive the pressing roller 20 to press against the electrode tab.

[0023] The elastic unit includes a round rod 14 and a spring 15; the round rod 14 is installed inside the pressing frame 13; the two ends of the spring 15 are respectively connected to the inner wall of the pressing frame 13 and the moving part 16; when the moving part 16 is pulled by the pull rope 10, the spring 15 is compressed and stored. When the pressing frame 13 drives the pressing roller 20 to rise and separate from the electrode ear, and at the same time the drive device 4 drives the take-up drum 9 to reverse, pulling the pull rope 10 to retract into the take-up drum 9, the elasticity provided by the spring 15 can also drive the moving part 16 to reset.

[0024] The rolling assembly includes a threaded rod 17, a lifting plate 18, an elastic element 19, a pressure roller 20, and a rotating part 21. The lifting plate 18 is slidably connected within the moving part 16. The two ends of the elastic element 19 are respectively connected to the lifting plate 18 and the pressure roller 20. The threaded rod 17 is rotatably connected within the moving part 16, and the lifting plate 18 is threadedly engaged with the threaded rod 17. The rotating part 21 is mounted on the top of the threaded rod 17. A moving cavity is opened in the middle of the moving part 16, and the lifting plate 18 is attached to the inner wall of the moving cavity. When it is necessary to increase the pressure applied to the electrode by the pressure roller 20, rotating the rotating part 21 drives the threaded rod 17 to rotate. Through the threaded engagement between the threaded rod 17 and the lifting plate 18, the lifting plate 18 moves towards the pressure roller 20. Furthermore, by attaching the lifting plate 18 to the inner wall of the moving cavity, the lifting plate 18 is prevented from shifting when the rotating threaded rod 17 drives it to move.

[0025] The limiting unit includes an elastic element 22 and a pressing part 23; the two ends of the elastic element 22 are respectively connected to the inner wall of the pressing frame 13 and the pressing part 23; when the pressing frame 13 drives the pressing part 23 to press the battery tab, the elasticity of the elastic element 22 drives the pressing part 23 to press one end of the battery tab, fixing one end of the battery tab, so that the subsequent elastic element 19 applies pressure to the pressing roller 20, and the pressing roller 20 moves stably when it tightly presses the tab.

[0026] Example 2, as Figures 2-5 As shown, the present invention proposes a laser welding tab device for battery processing. Compared with Embodiment 1, the dust collection mechanism of this embodiment includes a connecting part 24, a telescopic tube 25, and a dust collection part 26. The connecting part 24 is installed on the pressing frame 13, and the two ends of the telescopic tube 25 are respectively connected to the connecting part 24 and the dust collection part 26. The dust collection part 26 is installed inside the moving part 16. The dust collection device can be installed on the support platform 1, and then the two ends of the hose are respectively connected to the connecting part 24 and the dust collection end of the dust collection device. At this time, the dust collection device is started, and the micro dust generated by welding can be sucked into the telescopic tube 25, the connecting part 24, and the hose along the dust collection part 26, and then enter the dust collection device. In the prior art, dust collection is often carried out over a large area, which requires a large suction force to meet the dust collection needs of a large area.

[0027] The laser welding mechanism includes a drive device 2, a drive device 3, a drive device 4, and a laser welding unit 5. The drive device 2 is mounted on the support platform 1. The drive device 3 is mounted on the drive device 2 and is used to drive the drive device 4. The drive device 4 is mounted on the drive device 3 and is used to drive the support plate 6. The laser welding unit 5 is mounted on the drive device 2 and is used for laser welding. When the pressure roller 20 rolls and presses the tab, the laser generated by the laser welding unit 5 acts on the tab and moves with the pressure roller 20, so that the laser generated by the laser welding unit 5 can get very close to the pressure roller 20, so that the tab pressed tightly by the pressure roller 20 can be welded quickly.

[0028] In summary, in this application, multiple batteries are placed on the support platform 1, and the battery tabs are stacked together. Then, the second drive device 3 and the third drive device 4 are activated to drive the pressing frame 13 to press onto the tabs. At this time, the pressing part 23 presses one end of the tab, and at the same time, the elasticity is applied to the pressing roller 20 through the elastic element 19. The pressing roller 20 presses tightly onto the tab. Then, the fourth drive device 8 is activated to drive the take-up drum 9 to rotate. The rotation of the take-up drum 9 pulls the pull rope 10, and the pull rope 10 is limited by the limiting rod 11 and the limiting part 12, so that the pull rope 10 can stably pull the moving part 16 to move along the round rod 14. This allows the pressing roller 20 to press the battery tabs evenly. At the same time, the laser generated by the laser welding part 5 moves with the pressing roller 20, realizing pressing and welding at the same time, improving the welding stability.

[0029] When it is necessary to adjust the pressure applied to the battery tab by the pressing roller 20, the rotating part 21 is rotated to drive the threaded rod 17 to rotate, thereby driving the lifting plate 18 to rise and fall along the threaded rod 17. When the lifting plate 18 moves toward the pressing roller 20, when the subsequent pressing roller 20 presses on the battery tab, the elastic element 19 applies greater elasticity to the pressing roller 20, thus enabling greater pressure to be applied when facing some battery tabs with greater elasticity.

[0030] Simultaneously, the dust collection equipment is activated, causing the welding fumes to be drawn into the telescopic tube 25 from the dust collection part 26. Then, the dust enters the dust collection equipment. After one electrode is welded, the pressing frame 13 drives the pressing roller 20 to rise. Then, the drive device 4 8 drives the take-up drum 9 to reverse and release the pull rope 10. Subsequently, the moving part 16 is reset by the elastic movement of the spring 15.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A laser welding device for battery processing, comprising a support platform (1) and a laser welding mechanism, wherein the laser welding mechanism is mounted on the support platform (1), characterized in that, Also includes: A pressing mechanism, which is mounted on the laser welding mechanism; A dust extraction mechanism, which is mounted on a pressing mechanism and is used for dust extraction; The pressing mechanism includes a pressing component, a driving component, a pulling component, a rolling component, and a limiting unit. The pressing component is mounted on the driving end of the laser welding mechanism and is used to press the electrode tab. The driving component is mounted on the pressing component and is used to drive the pulling component. The pulling component is mounted on the driving end of the driving component and is used to drive the rolling component to move. The rolling component is installed inside the pulling component and is used to roll the electrode tab. The limiting unit is installed inside the pressing component and is used to press the electrode tab. The laser welding mechanism drives the pressing component to press the electrode tab, and the driving component drives the pulling component to move the rolling component to press the electrode tab tightly.

2. The laser welding tab equipment for battery processing according to claim 1, characterized in that, The pressing assembly includes a support plate (6) and a pressing frame (13); the support plate (6) is mounted on the drive end of the laser welding mechanism; the pressing frame (13) is mounted on the support plate (6) and is used to press the tabs.

3. The laser welding tab equipment for battery processing according to claim 2, characterized in that, The drive assembly includes a Z-shaped plate (7), a drive device four (8), and a take-up drum (9); the Z-shaped plate (7) is mounted on a support plate (6); the drive device four (8) is mounted on the Z-shaped plate (7); the take-up drum (9) is rotatably connected inside the Z-shaped plate (7) and mounted on the output shaft of the drive device four (8).

4. A laser welding device for battery processing according to claim 3, characterized in that, The pulling assembly includes a pull rope (10), a limiting rod (11), a limiting part (12), a moving part (16), and an elastic unit; the two ends of the pull rope (10) are connected to the take-up drum (9) and the moving part (16), respectively; the limiting rod (11) is installed on the support plate (6), the limiting part (12) is installed on the pressing frame (13), and the limiting rod (11) and the limiting part (12) limit the pull rope (10); the moving part (16) is slidably connected in the pressing frame (13); the elastic unit is installed in the pressing frame (13).

5. The laser welding tab equipment for battery processing according to claim 4, characterized in that, The elastic unit includes a round rod (14) and a spring (15); the round rod (14) is installed inside the pressing frame (13); the two ends of the spring (15) are connected to the inner wall of the pressing frame (13) and the moving part (16), respectively.

6. The laser welding tab equipment for battery processing according to claim 4, characterized in that, The rolling assembly includes a threaded rod (17), a lifting plate (18), an elastic element (19), a pressure roller (20), and a rotating part (21); the lifting plate (18) is slidably connected in the moving part (16); the two ends of the elastic element (19) are respectively connected to the lifting plate (18) and the pressure roller (20); the threaded rod (17) is rotatably connected in the moving part (16), and the lifting plate (18) is threadedly engaged with the threaded rod (17); the rotating part (21) is installed on the top of the threaded rod (17).

7. The laser welding tab equipment for battery processing according to claim 2, characterized in that, The limiting unit includes an elastic element two (22) and a pressing part (23); the two ends of the elastic element two (22) are respectively connected to the inner wall of the pressing frame (13) and the pressing part (23).

8. The laser welding tab equipment for battery processing according to claim 4, characterized in that, The vacuuming mechanism includes a connecting part (24), a telescopic tube (25), and a vacuuming part (26); the connecting part (24) is installed on the pressing frame (13), and the two ends of the telescopic tube (25) are connected to the connecting part (24) and the vacuuming part (26) respectively; the vacuuming part (26) is installed inside the moving part (16).

9. A laser welding device for battery processing according to claim 4, characterized in that, The laser welding mechanism includes a drive device 1 (2), a drive device 2 (3), a drive device 3 (4), and a laser welding unit (5); the drive device 1 (2) is mounted on the support platform (1); the drive device 2 (3) is mounted on the drive device 1 (2) and is used to drive the drive device 3 (4) to move; the drive device 3 (4) is mounted on the drive device 2 (3) and is used to drive the support plate (6) to move; the laser welding unit (5) is mounted on the drive device 1 (2) and is used for laser welding.

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