Tab welding equipment
By introducing a cutting device into the electrode welding equipment to cut the pre-welded edges, the problem of uneven edges of the soft electrode ears is solved, and the final welding quality and battery forming quality are improved.
Patent Information
- Application Number
- CN202422163487.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-04
AI Technical Summary
In the existing electrode welding equipment, the edges of several layers of soft electrodes are uneven, resulting in poor welding quality of the final welding device and affecting the battery forming quality.
The pre-welded first electrode edge is cut by a cutting device to flush it, and then the second electrode ear is welded to the flushed first electrode through a final welding device.
The welding quality of the final welding device is improved, and the forming quality and production efficiency of the battery are improved.
Smart Images
Figure CN223114587U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery processing, and particularly relates to an ear welding device. Background Art
[0002] In the related art, the ear welding device includes a pre-welding device and a final welding device. A plurality of layers of soft ears protrude from one side of the battery cell. After welding the edges of the plurality of layers of soft ears away from the battery cell together by the pre-welding device, the hard ear is then welded to the side of the soft ear away from the battery cell by the final welding device. Therefore, by providing the hard ear for external connection, a certain protection effect can be achieved on the soft ear.
[0003] However, after the edges of the plurality of layers of soft ears are welded together by the pre-welding device, the pre-welded edges are generally uneven. If the hard ear is directly welded to the pre-welded edge by the final welding device, the welding quality of the hard ear is poor, which is not conducive to ensuring the forming quality. Summary of the Utility Model
[0004] The main purpose of the utility model is to provide an ear welding device, aiming to ensure the welding quality of the final welding device, and then improve the forming quality of the battery.
[0005] To achieve the above purpose, the ear welding device proposed by the utility model includes a pre-welding device, a cutting device and a final welding device. The pre-welding device receives the battery cell. A plurality of layers of first ears protrude from one side of the battery cell. The pre-welding device is used to weld the edges of the plurality of layers of the first ears away from the battery cell together; the cutting device and the pre-welding device are arranged at intervals, and are used to connect the battery cell after being welded by the pre-welding device, and cut the side of the first ears away from the battery cell; the pre-welding device and the cutting device are arranged at intervals, and are used to connect the battery cell after being cut by the cutting device. The final welding device is used to weld the second ears to the side of the first ears away from the battery cell.
[0006] In an embodiment, the cutting device includes a first placing table and a cutting assembly. The first placing table and the pre-welding device are arranged at intervals, and are used to receive the battery cell after being welded by the pre-welding device. A first supporting portion also protrudes from the surface of the first placing table for receiving the battery cell, and the first supporting portion is used to support the first ears. The cutting assembly and the first placing table are arranged at intervals, and are used to cut the part of the first ears suspended on the first supporting portion.
[0007] In one embodiment, the cutting assembly includes a knife seat, a cutting cylinder, and a cutting knife. The knife seat is arranged on one side of the first storage table. The knife seat is provided with a cutting groove in the vertical direction. The first pole ear is supported on the opening edge of the cutting groove and is partially suspended in the cutting groove. The cutting cylinder is spaced apart from the knife seat in the vertical direction. The cutting knife is connected to the telescopic part of the cutting cylinder and, driven by the telescopic part, reciprocates along the groove depth direction of the cutting groove to cut the first pole ear part suspended in the cutting groove.
[0008] In one embodiment, the cutting device further comprises a collecting box, which is disposed vertically below the cutting assembly. A collecting groove is recessed on one side of the collecting box facing the cutting assembly for collecting the cut first pole lugs.
[0009] In one embodiment, the cutting device further includes an in-place detection component, and the in-place detection component is disposed on one side of the first placement table to detect whether the battery cell is placed on the first placement table.
[0010] In one embodiment, the pre-welding device includes a second placement table, a first welding seat and a first welding head, the second placement table is used to receive the battery core, the first welding seat and the second placement table are spaced apart, the first welding seat is used to support the first pole ear, the first welding head and the first welding seat are spaced apart and movably arranged in a direction approaching or moving away from the first welding seat, so as to weld several layers of the first pole ears into one by ultrasonic conduction.
[0011] In one embodiment, a second supporting portion is protruding from one side of the second placement table for receiving the battery cell, and the second supporting portion is used to support the first pole ear. The pre-welding device also includes a first pressing head, which is arranged on one side of the second placement table and is movably arranged in a direction close to or away from the second supporting portion to crimp the side of the first pole ear away from the second supporting portion.
[0012] In one embodiment, the final welding device includes a third placement table, a second welding seat and a second welding head. The third placement table is used to dock the battery cell cut by the cutting device. The second welding seat and the third placement table are spaced apart and are used to receive the second pole ear. The second welding head is movably arranged in a direction approaching or moving away from the second welding seat so as to weld the second pole ear to the side of the first pole ear away from the battery cell by ultrasonic conduction.
[0013] In one embodiment, the first pole tab includes several layers of positive pole tabs and several layers of negative pole tabs, the several layers of positive pole tabs and the several layers of negative pole tabs are located on the same side of the battery cell and are spaced apart perpendicular to the thickness direction of the battery cell; the pre-welding device includes a first pre-welding sub-device and a second pre-welding sub-device, the first pre-welding sub-device is used to weld several layers of the positive pole tabs; the second pre-welding sub-device is used to weld several layers of the negative pole tabs; the cutting device is used to cut the positive pole tab and the negative pole tab; the final welding device includes a first final welding sub-device and a second final welding sub-device, the first final welding sub-device is used to weld the second pole tab to the positive pole tab, and the second final welding sub-device is used to weld another second pole tab to the negative pole tab.
[0014] In one embodiment, the tab welding equipment further includes a loading device, a storage device and a retrieval device, wherein the loading device and the pre-welding device are arranged at intervals and the battery cell is cached therein; the storage device and the loading device are arranged at intervals and the storage device is cached therein with the second tab; the retrieval device is arranged at intervals from the loading device and the storage device and is used for transporting the battery cell and the second tab.
[0015] In the technical solution of the utility model, the edges of several layers of first pole tabs away from the battery cell are welded together by a pre-welding device; then the side of the first pole tab away from the battery cell is cut by a cutting device, and the final welding device is used to weld the second pole tab to the side of the first pole tab away from the battery cell. It is worth noting that before the final welding device welds the second pole tab, the pre-welding edge of the first pole tab is cut by the cutting device, so that the pre-welding edge of the first pole tab is flush, which is conducive to ensuring the welding quality of the final welding device, and then improving the molding quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0017] Figure 1 A schematic structural diagram of an embodiment of a tab welding device provided by the utility model;
[0018] Figure 2 for Figure 1 A schematic diagram of the top view of the structure of the middle tab welding equipment;
[0019] Figure 3 for Figure 1Schematic structural diagram of the first pre-welding sub-device in
[0020] Figure 4 is Figure 1 Schematic structural diagram of the second pre-welding sub-device in
[0021] Figure 5 is Figure 1 Schematic structural diagram of the cutting device in
[0022] Figure 6 is Figure 1 Schematic structural diagram of the first final welding sub-device in
[0023] Figure 7 is Figure 1 Schematic structural diagram of the second final welding sub-device in
[0024] Figure 8 is Figure 1 Schematic structural diagram of the glue pasting device in
[0025] Explanation of the reference numerals in the attached drawings: 10. Tab welding equipment; 1. Loading device; 2. Storage device; 21. Magazine; 23. Blowing member; 3. Pick-up device; 4. Pre-welding device; 41. First pre-welding sub-device; 43. Second pre-welding sub-device; 431. Second placement table; 4311. Second supporting portion; 433. First welding base; 435. First welding head; 437. First pressing head; 5. Cutting device; 51. First placement table; 511. First supporting portion; 53. Cutting assembly; 531. Cutting cylinder; 533. Telescopic portion; 535. Cutting knife; 537. Knife seat; 5371. Cutting groove; 55. Collection box; 56. In-place detection assembly; 6. Final welding device; 61. First final welding sub-device; 611. Third placement table; 6111. Third supporting portion; 613. Second welding base; 615. Second welding head; 63. Second final welding sub-device; 71. Barcode scanner; 73. Vision device; 75. Short-circuit test device; 77. Glue pasting device; 771. Driving assembly; 773. Glue pasting head; 91. Battery cell; 911. First tab; 9111. Positive tab; 9113. Negative tab; 913. Second tab.
[0026] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners
[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0028] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0029] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0030] In the related art, a tab welding device includes a pre-welding device and a final welding device. Several layers of soft tabs protrude from one side of the battery cell. After welding the edges of the several layers of soft tabs facing away from the battery cell into one body by the pre-welding device, the hard tab is then welded to the side of the soft tab facing away from the battery cell by the final welding device. Therefore, by providing a hard tab for external connection, a certain protection effect can be achieved on the soft tab.
[0031] However, after the edges of several layers of soft tabs are welded into one body by the pre-welding device, the pre-welded edges are generally uneven. If the hard tab is directly welded to the pre-welded edge by the final welding device, the welding quality of the hard tab is poor, which is not conducive to ensuring the forming quality.
[0032] To solve the above problems, a tab welding device 10 proposed by the present utility model aims to ensure the welding quality of the final welding device 6, thereby improving the forming quality of the battery.
[0033] Refer to Figures 1 to 8, in an embodiment of the present utility model, the tab welding device 10 includes a pre-welding device 4, a cutting device 5, and a final welding device 6. The pre-welding device 4 receives the battery cell 91, and several layers of first tabs 911 protrude from one side of the battery cell 91. The pre-welding device 4 is used to weld the edges of several layers of the first tabs 911 facing away from the battery cell 91 into one body; the cutting device 5 and the pre-welding device 4 are arranged at intervals, and are used to connect the battery cell 91 after being welded by the pre-welding device 4, and cut the side of the first tabs 911 facing away from the battery cell 91; the pre-welding device 4 and the cutting device 5 are arranged at intervals, and are used to connect the battery cell 91 after being cut by the cutting device 5, and the final welding device 6 is used to weld the second tab 913 to the side of the first tab 911 facing away from the battery cell 91.
[0034] Among them, the positive tab, the separator, and the negative tab are stacked in sequence to form a unit, and the gasket battery is generally further formed by stacking several such units, so that several layers of positive tabs or negative tabs protrude from one side of the battery cell 91. The first tab 911 is generally a soft tab, and its material can be selected as aluminum. The second tab 913 is generally a hard tab, and its material can be selected as copper.
[0035] In the technical solution of the present utility model, the edges of several layers of the first tabs 911 facing away from the battery cell 91 are welded into one body by the pre-welding device 4; then the cutting device 5 is used to cut the side of the first tabs 911 facing away from the battery cell 91, and the final welding device 6 is used to weld the second tab 913 to the side of the first tab 911 facing away from the battery cell 91. It should be noted that before the final welding device 6 welds the second tab 913, the pre-welded edge of the first tab 911 is cut by the cutting device 5 to make the pre-welded edge of the first tab 911 flush, which is beneficial to ensuring the welding quality of the final welding device 6 and then improving the forming quality of the battery.
[0036] Refer to Figure 5 , in an embodiment of the present utility model, the cutting device 5 includes a first placement table 51 and a cutting assembly 53. The first placement table 51 and the pre-welding device 4 are arranged at intervals, and are used to receive the battery cell 91 after being welded by the pre-welding device 4. A first supporting portion 511 also protrudes from the surface of the first placement table 51 for receiving the battery cell 91, and the first supporting portion 511 is used to support the first tab 911. The cutting assembly 53 and the first placement table 51 are arranged at intervals, and are used to cut the part of the first tab 911 suspended on the first supporting portion 511.
[0037] In this embodiment, the first tab 911 is generally a soft tab, which is prone to sagging without support. The first tab 911 is supported by the first supporting portion 511, so as to facilitate the cutting of the first tab 911 by the cutting assembly 53, further making the cutting edge of the first tab 911 flat, which is beneficial to further improving the welding quality of the final welding device 6.
[0038] Referring to Figure 5 , in an embodiment of the present invention, the cutting assembly 53 includes a tool holder 537, a cutting cylinder 531, and a cutter 535. The tool holder 537 is disposed on one side of the first placement table 51. The tool holder 537 is recessed with a cutting groove 5371 in the vertical direction. The first tab 911 is supported on the opening edge of the cutting groove 5371 and partially suspended in the cutting groove 5371. The cutting cylinder 531 is spaced from the tool holder 537 in the vertical direction. The cutter 535 is connected to the telescopic portion 533 of the cutting cylinder 531 and reciprocates along the depth direction of the cutting groove 5371 under the drive of the telescopic portion 533 to cut the part of the first tab 911 suspended in the cutting groove 5371.
[0039] In this embodiment, by providing the tool holder 537, the cutter 535 reciprocates along the direction of the cutting groove 5371 of the tool holder 537 under the connection drive of the telescopic portion 533 of the cutting cylinder 531, which is beneficial to further making the cutting edge of the first tab 911 flat and beneficial to further improving the welding quality of the final welding device 6.
[0040] Referring to Figure 5 , in an embodiment of the present invention, the cutting device 5 further includes a collection box 55. The collection box 55 is disposed directly below the cutting assembly 53. The side of the collection box 55 facing the cutting assembly 53 is recessed with a collection groove for collecting the cut first tab 911.
[0041] In this embodiment, by providing the collection box 55 to collect the cut first tab 911, it is possible to prevent the first tab 911 from adhering to the platform of the tab welding device 10, thereby avoiding direct contamination of the device platform.
[0042] Optionally, a sliding groove is formed on one side of the first placement table 51, and the collection box 55 is slidably disposed along the depth direction of the sliding groove to facilitate the taking and placing of the collection box 55.
[0043] Referring to Figure 5 , in an embodiment of the present invention, the cutting device 5 further includes a position detection assembly 56. The position detection assembly 56 is disposed on one side of the first placement table 51 to detect whether the battery cell 91 is placed on the first placement table 51.
[0044] In this embodiment, the in-place detection component 56 detects whether the battery cell 91 is placed on the first placement table 51. After the battery cell 91 is placed on the first placement table 51, the cutting component 53 cuts the first tab 911. Therefore, it can play a role in anti-fool detection and ensure the safe operation of the equipment.
[0045] Refer to Figure 3 and Figure 4 In an embodiment of the present invention, the pre-welding device 4 includes a second placement table 431, a first welding base 433, and a first welding head 435. The second placement table 431 is used to receive the battery cell 91. The first welding base 433 and the second placement table 431 are arranged at intervals. The first welding base 433 is used to support the first tab 911. The first welding head 435 and the first welding base 433 are arranged at intervals and are movably arranged in a direction close to or away from the first welding base 433, so as to weld several layers of the first tabs 911 into one body by ultrasonic conduction.
[0046] Among them, both the second placement table 431 and the first placement table 51 are platforms for carrying the battery cell 91 and can be the same platform.
[0047] In this embodiment, the pre-welding device 4 welds several layers of the first tabs 911 into one body by ultrasonic welding, with a relatively high welding rate and good forming effect.
[0048] Refer to Figure 3 and Figure 4 In an embodiment of the present invention, a second supporting portion 4311 protrudes from the surface of the second placement table 431 for receiving the battery cell 91. The second supporting portion 4311 is used to support the first tab 911. The pre-welding device 4 further includes a first pressing head 437. The first pressing head 437 is arranged on one side of the second placement table 431 and is movably arranged in a direction close to or away from the second supporting portion 4311 to press the side of the first tab 911 facing away from the second supporting portion 4311.
[0049] In this embodiment, by pressing the side of the first tab 911 facing away from the second supporting portion 4311 with the first pressing head 437, it is beneficial to prevent the first tab 911 from shaking during ultrasonic welding, thereby improving the pre-welding accuracy of the first tab 911.
[0050] Refer to Figure 6 and Figure 7, in an embodiment of the present utility model, the final welding device 6 includes a third placing table 611, a second welding base 613, and a second welding head 615. The third placing table 611 is used to dock the battery cell 91 cut by the cutting device 5. The second welding base 613 and the third placing table 611 are arranged at intervals and are used to hold the second tab 913. The second welding head 615 is movably arranged in a direction close to or away from the second welding base 613, so as to weld the second tab 913 to the side of the first tab 911 facing away from the battery cell 91 by means of ultrasonic conduction.
[0051] Among them, the first placing table 51, the second placing table 431, and the third placing table 611 are all platforms for carrying the battery cell 91 and can be the same platform. The third placing table 611 may be convexly provided with a third supporting portion 6111, and the third supporting portion 6111 is used to support the first tab 911 of the battery cell 91.
[0052] In this embodiment, the final welding device 6 realizes the welding of the second tab 913 to the side of the first tab 911 facing away from the battery cell 91 by ultrasonic welding, with a relatively high welding speed and good forming effect.
[0053] Refer to Figure 6 and Figure 7 , in an embodiment of the present utility model, the first tab 911 includes several layers of positive tabs 9111 and several layers of negative tabs 9113. The several layers of positive tabs 9111 and the several layers of negative tabs 9113 are located on the same side of the battery cell 91 and are arranged at intervals perpendicular to the thickness direction of the battery cell 91;
[0054] The pre-welding device 4 includes a first pre-welding sub-device 41 and a second pre-welding sub-device 43. The first pre-welding sub-device 41 is used to weld several layers of the positive tabs 9111; the second pre-welding sub-device 43 is used to weld several layers of the negative tabs 9113;
[0055] The cutting device 5 is used to cut the positive tabs 9111 and the negative tabs 9113;
[0056] The final welding device 6 includes a first final welding sub-device 61 and a second final welding sub-device 63. The first final welding sub-device 61 is used to weld the second tab 913 to the positive tab 9111, and the second final welding sub-device 63 is used to weld the other second tab 913 to the negative tab 9113.
[0057] In this embodiment, the first pre-welding sub-device 41 and the second pre-welding sub-device 43 are respectively used to pre-weld several layers of positive electrode tabs 9111 and negative electrode tabs 9113 of the battery cell 91. The cutting device 5 is used to cut the positive electrode tabs 9111 and the negative electrode tabs 9113. The first final-welding sub-device 61 and the second final-welding sub-device 63 are respectively used to finally weld several layers of positive electrode tabs 9111 and negative electrode tabs 9113 of the battery cell 91. Thus, the welding and cutting of the positive and negative electrode tabs of the battery can be realized on the same production line, which is beneficial to improving the production efficiency of the electrode tab welding equipment 10.
[0058] Referring to Figure 6 and Figure 7 In an embodiment of the present utility model, the electrode tab welding equipment 10 further includes a loading device 1, a storage device 2, and a picking device 3. The loading device 1 and the pre-welding device 4 are arranged at intervals and cache the battery cell 91. The storage device 2 and the loading device 1 are arranged at intervals. The storage device 2 caches the second electrode tabs 913. The picking device 3 is arranged at intervals with the loading device 1 and the storage device 2 and is used to carry the battery cell 91 and the second electrode tabs 913.
[0059] In this embodiment, the picking device 3 is used to carry the battery cell 91 of the loading device 1 to the pre-welding device 4 and carry the second electrode tabs 913 to the final-welding device 6. Thus, the automatic material transportation of the electrode tab welding equipment 10 can be realized, which is beneficial to improving the production efficiency of the electrode tab welding equipment 10.
[0060] Optionally, the storage device 2 includes a magazine 21 and a blowing member 23. The magazine 21 is provided with a plurality of hollow storage layers in the vertical direction. One storage layer is used to place one second electrode tab 913. The blowing member 23 and the magazine 21 are arranged at intervals and are used to blow air towards the storage member so that the second electrode tabs 913 in adjacent two storage layers move in opposite directions, which is beneficial to avoiding the second electrode tabs 913 from attracting each other due to electrical action and ensuring the normal picking of the picking device 3.
[0061] Referring to Figure 8 Optionally, the electrode tab welding equipment 10 further includes an adhesive pasting device 77. The adhesive pasting device 77 includes a driving component 771 and an adhesive pasting head 773. The adhesive pasting head 773 picks up the adhesive under the driving action of the driving component 771 and is used to paste the adhesive on the battery.
[0062] In summary, for the tab welding device 10 according to the embodiment of the present utility model, after the battery cell 91 is scanned by the barcode scanner 71 and then loaded, the vision device 73 is used to perform vision positioning and deviation correction on the position of the battery cell 91. Then, the welding of the positive tab 9111 is realized by the first pre-welding sub-device 41 in sequence, and the welding of the negative tab 9113 is realized by the second pre-welding sub-device 43. After that, the cutting device 5 is used to cut the welded positive tab 9111 and negative tab 9113. Then, the welding of the second tab 913 of the positive tab 9111 is realized by the first final welding sub-device 61 in sequence, and the welding of the second tab 913 of the negative tab 9113 is realized by the second final welding sub-device 63. After the welding of the second tab 913 of the battery cell 91 is completed, a protective tape is attached to the area of the first tab 911 to isolate the first tab 911, and the short-circuit test device 75 is used to perform a short-circuit test on the positive and negative tabs of the battery cell 91. Finally, the battery cell 91 product is unloaded.
[0063] The above description is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.
Claims
1. A tab welding device, characterized in that, The tab welding device includes: A pre-welding device that holds an electric core. A plurality of layers of first tabs protrude from one side of the electric core. The pre-welding device is used to weld the edges of the plurality of layers of the first tabs facing away from the electric core into one body. A cutting device that is spaced apart from the pre-welding device, used to dock with the electric core after being welded by the pre-welding device, and cut the side of the first tab facing away from the electric core; and A final welding device that is spaced apart from the pre-welding device and the cutting device, used to dock with the electric core after being cut by the cutting device. The final welding device is used to weld a second tab to the side of the first tab facing away from the electric core.
2. The tab welding device according to claim 1, characterized in that, The cutting device includes a first placement table and a cutting assembly. The first placement table is spaced apart from the pre-welding device and is used to hold the electric core after being welded by the pre-welding device. A first supporting portion protrudes from the surface of the first placement table for holding the electric core, and the first supporting portion is used to support the first tab. The cutting assembly is spaced apart from the first placement table and is used to cut the part of the first tab suspended on the first supporting portion.
3. The tab welding device according to claim 2, wherein The cutting assembly includes a tool holder, a cutting cylinder, and a cutting knife. The tool holder is arranged on one side of the first placement table. The tool holder is recessed with a cutting groove in the vertical direction. The first tab is supported on the opening edge of the cutting groove and partially suspended in the cutting groove. The cutting cylinder is spaced apart from the tool holder in the vertical direction. The cutting knife is connected to the telescopic part of the cutting cylinder and reciprocates along the depth direction of the cutting groove under the drive of the telescopic part to cut the part of the first tab suspended in the cutting groove.
4. The tab welding device according to claim 2, wherein The cutting device further includes a collection box. The collection box is arranged vertically below the cutting assembly. The side of the collection box facing the cutting assembly is recessed with a collection groove for collecting the cut-off first tabs.
5. The tab welding device according to claim 2, wherein The cutting device further includes a positioning detection assembly. The positioning detection assembly is arranged on one side of the first placement table to detect whether the electric core is placed on the first placement table.
6. The tab welding device according to any one of claims 1 to 5, characterized in that, The pre-welding device includes a second placement table, a first welding base, and a first welding head. The second placement table is used to hold the electric core. The first welding base is spaced apart from the second placement table and is used to support the first tab. The first welding head is spaced apart from the first welding base and is movably arranged in a direction close to or away from the first welding base to weld the plurality of layers of the first tabs into one body by ultrasonic conduction.
7. The tab welding device according to claim 6, wherein, A second supporting portion protrudes from the surface of the second placement table for holding the electric core. The pre-welding device further includes a first pressing head. The first pressing head is arranged on one side of the second placement table and is movably arranged in a direction close to or away from the second supporting portion to press the side of the first tab facing away from the second supporting portion.
8. The tab welding device according to any one of claims 1 to 5, characterized in that The final welding device includes a third placement table, a second welding seat and a second welding head. The third placement table is used to dock the battery cell cut by the cutting device. The second welding seat and the third placement table are spaced apart and are used to receive the second pole ear. The second welding head is movably arranged in a direction approaching or moving away from the second welding seat so as to weld the second pole ear to the side of the first pole ear away from the battery cell by ultrasonic conduction.
9. The tab welding device according to any one of claims 1 to 5, characterized in that, The first electrode tabs include a plurality of layers of positive electrode tabs and a plurality of layers of negative electrode tabs, wherein the plurality of layers of positive electrode tabs and the plurality of layers of negative electrode tabs are located on the same side of the battery cell and are spaced apart perpendicular to the thickness direction of the battery cell; The pre-welding device comprises a first pre-welding sub-device and a second pre-welding sub-device, wherein the first pre-welding sub-device is used to weld several layers of the positive electrode tabs; and the second pre-welding sub-device is used to weld several layers of the negative electrode tabs; The cutting device is used to cut the positive electrode tab and the negative electrode tab; The final welding device includes a first final welding sub-device and a second final welding sub-device, wherein the first final welding sub-device is used to weld the second pole tab to the positive pole tab, and the second final welding sub-device is used to weld another second pole tab to the negative pole tab.
10. The tab welding device according to any one of claims 1 to 5, characterized in that, The tab welding equipment also includes a loading device, a storage device and a retrieval device. The loading device and the pre-welding device are arranged at intervals and the battery cell is cached therein; the storage device and the loading device are arranged at intervals and the storage device caches the second tab; the retrieval device is arranged at intervals from the loading device and the storage device and is used to transport the battery cell and the second tab.