Battery cell tab welding and bending integrated device

Abstract

The utility model provides a battery cell tab welding and bending integrated device. The battery cell tab welding and bending integrated device comprises a fixing mechanism, a bending mechanism and a welding mechanism, the fixing mechanism comprises a cover plate limiting plate, a bending mechanism is arranged in the fixing mechanism, the output end of the bending mechanism is located at the top of the cover plate limiting plate, and a welding mechanism is arranged between the cover plate limiting plate and the output end of the bending mechanism. The fixing mechanism, the bending mechanism and the welding mechanism are matched with one another, the battery cell and the cover plate can be welded through the welding mechanism after being positioned by the output end of the bending mechanism and the cover plate limiting plate, and then the battery cell tab after welding is completed is bent through the bending mechanism. And the product quality is improved while the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery forming, in particular to an integrated device for welding and bending the tab of an electric core. Background Art

[0002] With the rapid development of China's new energy power battery industry, the popularity of lithium batteries is becoming more and more extensive; the lithium battery industry is roughly divided into square batteries, soft-pack batteries, cylindrical batteries, etc. For square batteries, most of them are formed by welding multiple single electric cores to a cover plate and then bending the tabs so that the electric core group can enter the aluminum shell of the electric core well; during the verification process of lithium batteries, most of the operation processes are completed manually. At the same time, the welding of the electric core tabs and the tab bending are generally completed separately. This process will lead to low production efficiency, poor unity and consistency in the completion of the welding and bending of the electric core tabs, and will also cause problems such as the product production qualification rate. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is how to improve the product quality while improving the production efficiency.

[0004] The utility model realizes the solution of the above technical problems through the following technical means:

[0005] An integrated device for welding and bending the tab of an electric core includes a fixing mechanism (1), a bending mechanism (2), and a welding mechanism (3); the fixing mechanism (1) includes a cover plate limiting plate (14). A bending mechanism (2) is arranged inside the fixing mechanism (1), and the output end of the bending mechanism (2) is located at the top of the cover plate limiting plate (14). A welding mechanism (3) is arranged between the cover plate limiting plate (14) and the output end of the bending mechanism (2).

[0006] Beneficial Effect: Through the mutual cooperation of the fixing mechanism, the bending mechanism, and the welding mechanism, the output end of the bending mechanism and the cover plate limiting plate can position the electric core and the cover plate and then weld them through the welding mechanism, and then bend the tab of the welded electric core through the bending mechanism, improving the product quality while improving the production efficiency.

[0007] Further, the fixing mechanism (1) further includes a fixing frame (11), and a cover plate limiting plate (14) is fixed between the tops of the two side plates of the fixing frame (11).

[0008] Further, a first suction cup (141) is fixedly penetrated through the bottom wall of the cover plate limiting plate (14).

[0009] Beneficial Effect: Through the setting of the first suction cup, it is used to fix the cover plate, ensure that the cover plate is stationary relative to the cover plate limiting plate, and ensure the consistency and effectiveness of the tab bending of the electric core.

[0010] Further, the bending mechanism (2) includes a third motor (24), a linkage seat (25), a first rotating assembly (26), a second rotating assembly (27), a first battery cell limiting plate (28), and a second battery cell limiting plate (29). The output end of the third motor (24) is fixed with the linkage seat (25). Along the Y-axis, a first connecting plate (251) and a second connecting plate (252) are fixedly arranged in parallel at intervals on the top wall of the linkage seat (25). The first rotating assembly (26) is rotatably connected to the first connecting plate (251), and the second rotating assembly (27) is rotatably connected to the second connecting plate (252). The first rotating assembly (26) is fixed on the first battery cell limiting plate (28), and the second rotating assembly (27) is fixed on the second battery cell limiting plate (29). The first battery cell limiting plate (28) and the second battery cell limiting plate (29) are both located above the cover limiting plate (14) and are rotatably connected to the two side plates of the fixed frame (11).

[0011] Beneficial effects: Through the mutual cooperation of the third motor, the linkage seat, the first rotating assembly, the second rotating assembly, the first battery cell limiting plate, and the second battery cell limiting plate, the pole ears of the battery cells after welding can be bent.

[0012] Further, a first fixing plate (12) and a second fixing plate (13) are fixedly arranged at intervals on the top wall of the bottom plate of the fixed frame (11). A first motor (21) is fixed on the first fixing plate (12), and a second motor (22) is fixed on the second fixing plate (13). The first motor (21) and the second motor (22) are arranged adjacent to each other. The output ends of the first motor (21) and the second motor (22) are both fixed on a fixing frame (23). The first motor (21) and the second motor (22) are of the same specification and are started synchronously during operation. A third motor (24) is fixed inside the fixing frame (23).

[0013] Beneficial effects: Through the arrangement of the first motor and the second motor, the stroke of the bending mechanism can be increased to complete the bending action of the pole ears.

[0014] Further, the second rotating assembly (27) includes a rotating rod (271) and a rotating block (272). One end of the rotating rod (271) is rotatably connected to the second connecting plate (252), and the other end of the rotating rod (271) is rotatably connected to the rotating block (272). The rotating block (272) is fixedly connected to the second battery cell limiting plate (29).

[0015] Further, the structures of the first rotating assembly (26) and the second rotating assembly (27) are the same.

[0016] Further, the cross-section of the second battery cell limiting plate (29) is arranged in a "mountain" shape. A limiting groove (291) is formed in the vertical plate in the middle of the second battery cell limiting plate (29). The two side grooves of the second battery cell limiting plate (29) are clamped into the two side plates of the fixed frame (11), and the two vertical plates on both sides of the second battery cell limiting plate (29) are respectively rotatably connected to the two side plates of the fixed frame (11); the first battery cell limiting plate (28) is arranged in a mirror image of the second battery cell limiting plate (29).

[0017] Beneficial effects: Through the arrangement of the battery cell limiting plates, it is used to place the battery cells. When the battery cells are placed between the battery cell limiting plates, the tabs and the cover plate can be in an accurate relative position, ensuring the accuracy of the welding position.

[0018] Further, second suction cups (281) are fixedly penetrated through the bottom walls of the first battery cell limiting plate (28) and the second battery cell limiting plate (29).

[0019] Beneficial effects: Through the arrangement of the second suction cups, it is used to fix the battery cells, ensuring that the battery cells are stationary relative to the battery cell limiting plates, and ensuring the consistency and effectiveness of the bending of the battery cell tabs.

[0020] Further, the welding mechanism (3) includes a pressing plate (31), a welding head (32), positioning pins (33), mounting ears (34), and quick clamps (35). A plurality of mounting openings are spaced along the X-axis and penetrated through the pressing plate (31). Welding heads (32) are fixed in the plurality of mounting openings. A rectangular spring is fixed between the welding head (32) and the mounting opening of the pressing plate (31). Positioning pins (33) are fixed on both sides of the bottom wall of the pressing plate (31). Mounting ears (34) are fixed on both side walls at both ends of the pressing plate (31). Quick clamps (35) are hung on each of the mounting ears (34).

[0021] Beneficial effects: Through the mutual cooperation of the pressing plate, the welding head, the positioning pins, the mounting ears, and the quick clamps, the welding mechanism can be detachably fixed on the cover plate limiting plate. After the cover plate and the battery cells are placed, the pressing plate is positioned by the positioning pins on both sides and placed on the tabs and the cover plate. Then, the pressing plate and the cover plate limiting plate are locked by the quick clamps to ensure tight welding; the rectangular spring ensures the buffering effect of the welding head during the process of pressing the tabs. Description of the Drawings

[0022] Figure 1 It is a three-dimensional welding state diagram of the battery cell tab welding and bending integrated device according to the first embodiment of the present invention;

[0023] Figure 2 It is a three-dimensional bending state diagram of the battery cell tab welding and bending integrated device according to the first embodiment of the present invention;

[0024] Figure 3 This is an assembly drawing of the cover plate limiting plate and the battery cell limiting plate in different perspectives in the battery cell tab welding and bending integrated device of the first embodiment of the present invention;

[0025] Figure 4 This is a partial assembly drawing of the fixing mechanism and the bending mechanism in the battery cell tab welding and bending integrated device of the first embodiment of the present invention;

[0026] Figure 5 This is a three-dimensional view of the welding mechanism in the battery cell tab welding and bending integrated device of the first embodiment of the present invention. Detailed implementation manners

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1

[0029] As Figure 1 shown, this embodiment provides a battery cell tab welding and bending integrated device, including a fixing mechanism 1, a bending mechanism 2, and a welding mechanism 3.

[0030] As Figure 1 、 Figure 2 、 Figure 3 shown, the fixing mechanism 1 includes a fixing frame 11, a first fixing plate 12, a second fixing plate 13, and a cover plate limiting plate 14. The vertical cross-section of the fixing frame 11 is U-shaped. The first fixing plate 12 and the second fixing plate 13 are fixedly arranged at intervals on the top wall of the bottom plate of the fixing frame 11. A cover plate limiting plate 14 is fixed between the tops of the two side plates of the fixing frame 11 for placing the cover plate 5 and the tabs 41 of the battery cell 4, ensuring that the cover plate 5 can be accurately positioned when placed in the cover plate limiting plate 14. A first suction cup 141 is fixedly penetrated through the bottom wall of the cover plate limiting plate 14 for fixing the cover plate 5, ensuring that the cover plate 5 is stationary relative to the cover plate limiting plate 14 and ensuring the consistency and effectiveness of the bending of the battery cell tabs 41. The first suction cup 141 is a prior art.

[0031] As Figure 2 、 Figure 3 、 Figure 4As shown in the figure, the bending mechanism 2 includes a first motor 21, a second motor 22, a fixed frame 23, a third motor 24, a linkage seat 25, a first rotating assembly 26, a second rotating assembly 27, a first battery cell limiting plate 28, and a second battery cell limiting plate 29. The first motor 21 is fixed on the first fixed plate 12, and the second motor 22 is fixed on the second fixed plate 13. The first motor 21 and the second motor 22 are arranged adjacent to each other, and the output ends of the first motor 21 and the second motor 22 are both fixed on the fixed frame 23. The first motor 21 and the second motor 22 are of the same specification and start synchronously during operation. The third motor 24 is fixed inside the fixed frame 23, and the output end of the third motor 24 is fixed on the linkage seat 25. The arrangement of the first motor 21 and the second motor 22 can increase the stroke of the bending mechanism 2 to complete the bending action of the tab 41. On the top wall of the linkage seat 25, a first connecting plate 251 and a second connecting plate 252 are fixedly arranged at intervals along the Y-axis in parallel. The first rotating assembly 26 is rotatably connected to the first connecting plate 251, and the second rotating assembly 27 is rotatably connected to the second connecting plate 252. The first rotating assembly 26 is fixed on the first battery cell limiting plate 28, and the second rotating assembly 27 is fixed on the second battery cell limiting plate 29. The first battery cell limiting plate 28 and the second battery cell limiting plate 29 are both located above the cover limiting plate 14 and are rotatably connected to the two side plates of the fixed frame 11. The structures of the first rotating assembly 26 and the second rotating assembly 27 are the same. Now, taking the second rotating assembly 27 as an example for introduction, the second rotating assembly 27 includes a rotating rod 271 and a rotating block 272. One end of the rotating rod 271 is rotatably connected to the second connecting plate 252, and the other end of the rotating rod 271 is rotatably connected to the rotating block 272. The rotating block 272 is fixedly connected to the second battery cell limiting plate 29. The first battery cell limiting plate 28 and the second battery cell limiting plate 29 are mirror-image settings. Now, taking the second battery cell limiting plate 29 as an example for introduction, the cross-section of the second battery cell limiting plate 29 is in a "mountain" shape. A limiting groove 291 is opened on the vertical plate in the middle of the second battery cell limiting plate 29 for placing the battery cell 4, ensuring that when the battery cell 4 is placed between the battery cell limiting plates, the tab 41 and the cover 5 can be in an accurate relative position, ensuring the accuracy of the welding position. The two side grooves of the second battery cell limiting plate 29 are clamped into the two side plates of the fixed frame 11, and the two vertical plates on both sides of the second battery cell limiting plate 29 are respectively rotatably connected to the two side plates of the fixed frame 11. Second suction cups 281 are fixedly penetrated through the bottom walls of the first battery cell limiting plate 28 and the second battery cell limiting plate 29 for fixing the battery cell 4, ensuring that the battery cell 4 is stationary relative to the battery cell limiting plate, ensuring the consistency and effectiveness of the bending of the battery cell tab 41. The second suction cup 281 is a prior art.

[0032] As Figure 1 、 Figure 5As shown in the figure, the welding mechanism 3 includes a pressure plate 31, a welding head 32, positioning pins 33, mounting ears 34, and quick clamps 35. Two mounting openings are formed in the pressure plate 31 at intervals along the X-axis. Welding heads 32 are fixed in both mounting openings. A rectangular spring (not shown in the figure) is fixed between the welding head 32 and the mounting opening of the pressure plate 31 to ensure the buffering effect of the welding head 32 during the process of pressing the tab. One positioning pin 33 is fixed on each side of the bottom wall of the pressure plate 31, and one mounting ear 34 is fixed on each side wall at both ends of the pressure plate 31. Quick clamps 35 are hung on each mounting ear 34. The quick clamps 35 are of the prior art and can detachably fix the welding mechanism 3 on the cover limiting plate 14. After the cover 5 and the battery cell 4 are placed, the pressure plate 31 is positioned by the positioning pins 33 on both sides and placed on the tab 41 and the cover 5, and then the pressure plate 31 and the cover limiting plate 14 are locked by the quick clamps 35 to ensure tight welding.

[0033] During use, the cover 5 is placed in the cover limiting plate 14, and then the two battery cells 4 are respectively placed mirror-image in the first battery cell limiting plate 28 and the second battery cell limiting plate 29 so that the tab 41 is located above the cover 5. The welding mechanism 3 is placed directly above the tab 41 of the battery cell to ensure that the welding head 32 is aligned with the welding position of the tab 41. The tab 41 is pressed by the quick clamps 35, and then welding is performed by an external laser. After the tab 41 and the cover 5 are welded, the quick clamps 35 are removed and the welding mechanism 3 is taken off. The first suction cup 141 and the second suction cup 281 are started to adsorb the cover 5 and the battery cell 4 respectively, and during the bending process, the relative static state of the battery cell 4 and the cover 5 is ensured. At the same time, the first motor 21, the second motor 22, and the third motor 24 are started to drive the linkage seat 25, the first rotating assembly 26, and the second rotating assembly 27 to move, so that the first battery cell limiting plate 28 and the second battery cell limiting plate 29 perform bending movements to realize the bending action of the tab 41.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated device for welding and bending the tab of an electrode core, characterized in that, It includes a fixing mechanism (1), a bending mechanism (2), and a welding mechanism (3). The fixing mechanism (1) includes a cover plate limiting plate (14). A bending mechanism (2) is arranged inside the fixing mechanism (1). The output end of the bending mechanism (2) is located on the top of the cover plate limiting plate (14). A welding mechanism (3) is arranged between the cover plate limiting plate (14) and the output end of the bending mechanism (2).

2. The integrated device for welding and bending the tab of an electrode core according to claim 1, wherein: The fixing mechanism (1) further includes a fixing frame (11). A cover plate limiting plate (14) is fixed between the tops of the two side plates of the fixing frame (11).

3. The integrated device for welding and bending the tab of an electrode core according to claim 2, characterized in that: A first suction cup (141) is fixedly penetrated through the bottom wall of the cover plate limiting plate (14).

4. The integrated device for welding and bending the tab of an electrode core according to claim 2, wherein: The bending mechanism (2) includes a third motor (24), a linkage seat (25), a first rotating assembly (26), a second rotating assembly (27), a first battery cell limiting plate (28), and a second battery cell limiting plate (29). The output end of the third motor (24) is fixed with a linkage seat (25). A first connecting plate (251) and a second connecting plate (252) are fixedly arranged at equal intervals along the Y-axis on the top wall of the linkage seat (25). A first rotating assembly (26) is rotatably connected to the first connecting plate (251). A second rotating assembly (27) is rotatably connected to the second connecting plate (252). The first rotating assembly (26) is fixed on the first battery cell limiting plate (28). The second rotating assembly (27) is fixed on the second battery cell limiting plate (29). The first battery cell limiting plate (28) and the second battery cell limiting plate (29) are both located above the cover plate limiting plate (14) and are rotatably connected to the two side plates of the fixing frame (11).

5. The integrated device for welding and bending the tab of an electrode core according to claim 4, wherein: On the top wall of the bottom plate of the fixing frame (11), a first fixing plate (12) and a second fixing plate (13) are fixedly arranged at intervals. A first motor (21) is fixed on the first fixing plate (12). A second motor (22) is fixed on the second fixing plate (13). The first motor (21) and the second motor (22) are arranged adjacent to each other. The output ends of the first motor (21) and the second motor (22) are both fixed on a fixing bracket (23). The first motor (21) and the second motor (22) are of the same specification and are started synchronously during operation. A third motor (24) is fixed inside the fixing bracket (23).

6. The integrated device for welding and bending the tab of an electrode core according to claim 4, wherein: The second rotating assembly (27) includes a rotating rod (271) and a rotating block (272). One end of the rotating rod (271) is rotatably connected to the second connecting plate (252). The other end of the rotating rod (271) is rotatably connected to the rotating block (272). The rotating block (272) is fixedly connected to the second battery cell limiting plate (29).

7. A core tab welding and bending integrated device according to any one of claims 4-6, characterized in that: The structures of the first rotating assembly (26) and the second rotating assembly (27) are the same.

8. A cell tab welding and bending integrated device according to claim 4, characterized in that: The cross-section of the second battery cell limiting plate (29) is arranged in a "mountain" shape. A limiting groove (291) is formed in the vertical plate in the middle of the second battery cell limiting plate (29). The two side grooves of the second battery cell limiting plate (29) are clamped into the two side plates of the fixed frame (11). The two vertical plates on both sides of the second battery cell limiting plate (29) are respectively rotatably connected to the two side plates of the fixed frame (11). The first battery cell limiting plate (28) is arranged in a mirror image of the second battery cell limiting plate (29).

9. The integrated device for welding and bending the tab of an electrode core according to claim 4, wherein: Second suction cups (281) are fixedly penetrated through the bottom walls of the first battery cell limiting plate (28) and the second battery cell limiting plate (29).

10. A core tab welding and bending integrated device according to claim 1, characterized in that: The welding mechanism (3) includes a pressing plate (31), a welding head (32), a positioning pin (33), mounting ears (34), and quick clamps (35). A plurality of mounting openings are formed in the pressing plate (31) at intervals along the X-axis. Welding heads (32) are fixed in the plurality of mounting openings. A rectangular spring is fixed between the welding head (32) and the mounting opening of the pressing plate (31). Positioning pins (33) are fixed on both sides of the bottom wall of the pressing plate (31). Mounting ears (34) are fixed on the side walls at both ends of the pressing plate (31). Quick clamps (35) are hung on each of the mounting ears (34).

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