Lithium battery cell tab welding device

Abstract

The utility model provides a lithium battery cell tab welding device, which belongs to the technical field of battery processing and comprises a battery body. The tab to be welded is fixedly connected to the upper end of the battery body; the fixing mechanism comprises a spring sleeve, a spring groove, a spring plate, an extrusion block, an extrusion cylinder, a tab groove and two extrusion springs, the spring sleeve is arranged on the upper side of the battery body, the spring groove is formed in the lower end of the spring sleeve, and the spring plate is slidably connected into the spring groove; and the two extrusion springs are fixedly connected to the upper end of the spring plate and the upper inner wall extrusion block of the spring groove, and the extrusion cylinder extrudes the battery body and the to-be-welded tab to be fixed all the time during welding.

Description

Technical Field

[0001] This utility model belongs to the field of battery processing technology, specifically relating to a lithium battery cell tab welding device. Background Technology

[0002] In existing technologies, the tab is a key component of lithium-ion batteries (including polymer lithium-ion batteries), which is responsible for connecting the positive and negative electrodes inside the battery to an external circuit so as to input (charge) and output (discharge) electrical energy.

[0003] Authorized publication number "CN219131315U" discloses a battery casing welding and fixing device, including: a base plate, a side plate assembly disposed on the base plate, and a pressure plate disposed on top of the side plate assembly; the base plate is used to place the battery casing; the side plate assembly is provided with positioning angles for positioning the sides of the battery casing; the pressure plate is used to press and fix the battery casing. This application, by setting the side plate assembly on the base plate, allows the positioning angles on the side plate assembly and the base plate to jointly achieve the positioning function of the battery casing, preventing casing displacement. Simultaneously, the pressure plate on top of the side plate assembly fixes the battery casing and the metal sheet to be welded to the battery casing to the device under the pressure of the pressure plate, further preventing battery casing displacement during welding, improving welding positional accuracy, and increasing production yield.

[0004] The aforementioned new technology avoids the battery casing from shifting during welding, improves the welding position accuracy, and increases the production yield. However, when welding tabs, the existing technical solutions can only fix one type of tab, and cannot freely fix different types of tabs. Utility Model Content

[0005] The purpose of this utility model is to provide a lithium battery cell tab welding device, which aims to solve the problem that existing welding equipment can only fix one type of tab when welding tabs, and cannot freely fix different types of tabs.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lithium battery cell tab welding device, comprising:

[0008] Battery body;

[0009] A tab to be welded, which is fixedly connected to the upper end of the battery body;

[0010] The fixing mechanism includes a spring sleeve, a spring groove, a spring plate, a compression block, a compression cylinder, a tab groove, and compression springs. Two compression springs are provided. The spring sleeve is located on the upper side of the battery body. The spring groove is opened at the lower end of the spring sleeve. The spring plate is slidably connected in the spring groove. Both compression springs are fixedly connected to the upper end of the spring plate and the upper inner wall of the spring groove. The compression block is fixedly connected to the lower end of the spring plate. The compression cylinder is fixedly connected to the lower end of the compression block. The tab groove is opened at the lower end of the compression cylinder.

[0011] In a preferred embodiment of this utility model, a rubber pad is fixedly connected inside the extrusion cylinder, and the rubber pad is made of rubber.

[0012] In a preferred embodiment of this utility model, a rotating plate is fixedly connected to the upper end of the spring sleeve, a supporting circular plate is provided on the upper side of the rotating plate, a rotating groove is provided in the supporting circular plate, the rotating plate rotates in the rotating groove, a motor fixing block is fixedly connected to the upper end of the supporting circular plate, a drive motor is fixedly connected in the motor fixing block, and the output end of the drive motor is fixed to the rotating plate.

[0013] In a preferred embodiment of this utility model, a fixed base is fixedly connected to the lower end of the rotating plate, a first motor is fixedly connected to one side of the fixed base, a first robotic arm is fixedly connected to the output end of the first motor, a second motor is fixedly connected to one side of the first robotic arm, and a welding head is fixedly connected to the output end of the second motor.

[0014] In a preferred embodiment of this utility model, a connecting plate is fixedly connected to one side of the supporting circular plate, and the connecting plate is connected to an external lifting mechanism.

[0015] As a preferred embodiment of this utility model, a fixing pad is provided on the outer side of the battery body.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this solution, the compression spring, which is compressed, always applies a downward thrust to the spring plate, thereby keeping the battery body and the electrode to be welded fixed during welding. Through the certain extension and contraction properties of the compression spring, the compression spring can fix the battery body and the electrode to be welded when welding battery bodies and electrodes of different heights.

[0018] 2. In this solution, the device applies a pushing force by compressing the spring to limit the pressure on the tab to be welded, thus preventing the tab from being damaged by mechanical force when fixing the battery body and the tab to be welded. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a three-dimensional structural view of the present invention;

[0021] Figure 2 This is an exploded view of the structure in this utility model;

[0022] Figure 3 This is the first exploded sectional view of this utility model;

[0023] Figure 4 This is the second exploded cross-sectional view of this utility model.

[0024] In the diagram: 1. Battery body; 2. Terminal tab to be welded; 3. Spring sleeve; 4. Spring groove; 5. Spring plate; 6. Extrusion block; 7. Extrusion cylinder; 8. Terminal tab groove; 9. Extrusion spring; 10. Rubber pad; 11. Supporting circular plate; 12. Rotating groove; 13. Rotating plate; 14. Motor fixing block; 15. Drive motor; 16. Fixing base; 17. First robotic arm; 18. First motor; 19. Welding head; 20. Second motor; 21. Fixing pad; 22. Connecting plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example

[0027] Please see Figures 1-4 The present invention provides the following technical solution:

[0028] A lithium battery cell tab welding device, comprising:

[0029] Battery body 1;

[0030] The electrode tab 2 to be welded is fixedly connected to the upper end of the battery body 1;

[0031] The fixing mechanism includes a spring sleeve 3, a spring groove 4, a spring plate 5, a compression block 6, a compression cylinder 7, an electrode tab groove 8, and a compression spring 9. There are two compression springs 9. The spring sleeve 3 is located on the upper side of the battery body 1. The spring groove 4 is opened at the lower end of the spring sleeve 3. The spring plate 5 is slidably connected in the spring groove 4. Both compression springs 9 are fixedly connected to the upper end of the spring plate 5 and the upper inner wall of the spring groove 4. The compression block 6 is fixedly connected to the lower end of the spring plate 5. The compression cylinder 7 is fixedly connected to the lower end of the compression block 6. The electrode tab groove 8 is opened at the lower end of the compression cylinder 7.

[0032] In a specific embodiment of this utility model, the electrode tab 2 to be welded is the electrical connection part of the battery body 1. When welding the battery body 1 and the electrode tab 2 to be welded, the battery body 1 is first placed at the welding point at the lower end of the welding device, and then the welding and fixing device is moved downwards. The circular groove in the electrode tab groove 8, when the fixing device moves downwards, causes the extrusion cylinder 7 to first contact the electrode tab 2 to be welded, and the electrode tab groove 8 is fitted onto the outside of the electrode tab 2 to be welded, fixing the electrode tab. Then, the spring sleeve 3 continues to move downwards with the fixing assembly. After the extrusion cylinder 7 is fitted onto the electrode tab 2 to be welded, the positions of the extrusion block 6 and the spring plate 5 are fixed, and the spring sleeve 3 continues to move downwards. When the upper inner wall of the spring sleeve 3 is compressed, the compression spring 9 is contracted until the spring sleeve 3 descends to the welding height. The compressed compression spring 9 always applies a downward thrust to the spring plate 5, so that the compression cylinder 7 keeps the battery body 1 and the electrode 2 to be welded fixed during welding. Through the certain expansion and contraction properties of the compression spring 9, when welding battery bodies 1 and electrode 2 of different heights, the compression cylinder 7 can fix the battery body 1 and electrode 2 to be welded. The rebound force of the compression spring 9 applies a thrust to prevent mechanical force from fixing the battery body 1 and electrode 2 to be welded and crushing the electrode 2.

[0033] Please refer to the details. Figures 1-4 A rubber pad 10 is fixedly connected inside the extrusion cylinder 7. The rubber pad 10 is made of rubber.

[0034] In this embodiment, the rubber pad 10 is made of rubber and is located inside the extrusion cylinder 7. When the extrusion cylinder 7 presses on the electrode tab 2 to be welded, the rubber pad 10 can deform freely and wrap around the upper end of the electrode tab 2 to be welded, so that the extrusion cylinder 7 can wrap and fix the battery body 1 and the electrode tab 2 of different models during welding.

[0035] Please refer to the details. Figures 1-4A rotating plate 13 is fixedly connected to the upper end of the spring sleeve 3. A supporting circular plate 11 is provided on the upper side of the rotating plate 13. A rotating groove 12 is opened in the supporting circular plate 11. The rotating plate 13 rotates in the rotating groove 12. A motor fixing block 14 is fixedly connected to the upper end of the supporting circular plate 11. A drive motor 15 is fixedly connected in the motor fixing block 14. The output end of the drive motor 15 is fixed to the rotating plate 13.

[0036] In this embodiment: the support circular plate 11 is used to support the welding mechanism and the fixing mechanism. During welding, the lifting mechanism drives the support circular plate 11 to move up and down to weld the battery body 1 and the electrode tab 2 to be welded. The rotating plate 13 rotates in the rotating groove 12, and the upper end of the rotating plate 13 protrudes from the upper end of the support circular plate 11 and is fixed to the output end of the drive motor 15. The motor fixing block 14 is used to fix the drive motor 15. During welding, the output end of the drive motor 15 drives the welding mechanism at the lower end of the rotating plate 13 to rotate to weld the electrode tab 2 to be welded around its perimeter.

[0037] Please refer to the details. Figures 1-4 A fixed base 16 is fixedly connected to the lower end of the rotating plate 13. A first motor 18 is fixedly connected to one side of the fixed base 16. A first robotic arm 17 is fixedly connected to the output end of the first motor 18. A second motor 20 is fixedly connected to one side of the first robotic arm 17. A welding head 19 is fixedly connected to the output end of the second motor 20.

[0038] In this embodiment: the fixed base 16 is the base of the welding mechanism and is used to support the welding mechanism. The first robotic arm 17 is the base robotic arm. One end of the first robotic arm 17 rotates on one side of the fixed base 16. The output end of the first motor 18 drives the first robotic arm 17 to rotate to change the position of the welding head 19. The output end of the second motor 20 is fixed to the welding head 19. When welding, the output angle of the welding head 19 is changed to weld and fix the area around the electrode tab 2 to be welded.

[0039] Please refer to the details. Figures 1-4 A connecting plate 22 is fixedly connected to one side of the supporting circular plate 11, and the connecting plate 22 is connected to the external lifting mechanism.

[0040] In this embodiment: the connecting plate 22 is the connection part between the supporting circular plate 11 and the lifting mechanism. The connecting plate 22 is provided with multiple threaded holes. The connecting plate 22 is connected to the lifting mechanism through the threaded holes. When welding, the lifting mechanism drives the welding mechanism and the fixing mechanism to move up and down to weld the lower battery body 1 and the electrode tab 2 to be welded.

[0041] Please refer to the details. Figures 1-4 A fixing pad 21 is fitted on the outside of the battery body 1.

[0042] In this embodiment: the fixing pad 21 is located on the upper side of the welding point. When welding, the battery body 1 is fixed in the fixing pad 21 to complete the initial fixing of the battery body 1. Then the battery body 1 and the electrode tab 2 to be welded are welded.

[0043] The working principle and usage process of this utility model: The electrode tab 2 to be welded is the electrical connection part of the battery body 1. When welding the battery body 1 and the electrode tab 2 to be welded, the battery body 1 is first placed at the welding point at the lower end of the welding device. Then, the welding and fixing device is moved downwards. The circular groove in the electrode tab groove 8, when the fixing device moves downwards, the extrusion cylinder 7 first contacts the electrode tab 2 to be welded, and the electrode tab groove 8 is fitted onto the outside of the electrode tab 2 to be welded, fixing the electrode tab. Then, the spring sleeve 3 continues to move downwards with the fixing assembly. After the extrusion cylinder 7 is fitted onto the electrode tab 2 to be welded, the positions of the extrusion block 6 and the spring plate 5 are fixed, and the spring sleeve 3 continues to move downwards. At this time, the upper inner wall of the spring sleeve 3 compresses the compression spring 9 until the spring sleeve 3 descends to the welding height. The compressed compression spring 9 always applies a downward thrust to the spring plate 5, so that the compression cylinder 7 keeps the battery body 1 and the electrode 2 to be welded fixed during welding. Through the certain expansion and contraction properties of the compression spring 9, when welding battery bodies 1 and electrode 2 of different heights, the compression cylinder 7 can fix the battery body 1 and electrode 2 to be welded. The spring force of the compression spring 9 applies a thrust to prevent mechanical force from fixing the battery body 1 and electrode 2 to be welded and crushing the electrode 2.

[0044] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lithium battery cell tab welding device, characterized in that: include: Battery body (1); A tab (2) to be welded is fixedly connected to the upper end of the battery body (1); The fixing mechanism includes a spring sleeve (3), a spring groove (4), a spring plate (5), a compression block (6), a compression cylinder (7), an electrode groove (8), and a compression spring (9). There are two compression springs (9). The spring sleeve (3) is located on the upper side of the battery body (1). The spring groove (4) is opened at the lower end of the spring sleeve (3). The spring plate (5) is slidably connected in the spring groove (4). The two compression springs (9) are fixedly connected to the upper end of the spring plate (5) and the upper inner wall of the spring groove (4). The compression block (6) is fixedly connected to the lower end of the spring plate (5). The compression cylinder (7) is fixedly connected to the lower end of the compression block (6). The electrode groove (8) is opened at the lower end of the compression cylinder (7).

2. The lithium battery cell tab welding device according to claim 1, characterized in that: A rubber pad (10) is fixedly connected inside the extrusion cylinder (7), and the rubber pad (10) is made of rubber.

3. The lithium battery cell tab welding device according to claim 2, characterized in that: A rotating plate (13) is fixedly connected to the upper end of the spring sleeve (3). A supporting circular plate (11) is provided on the upper side of the rotating plate (13). A rotating groove (12) is provided in the supporting circular plate (11). The rotating plate (13) rotates in the rotating groove (12). A motor fixing block (14) is fixedly connected to the upper end of the supporting circular plate (11). A drive motor (15) is fixedly connected in the motor fixing block (14). The output end of the drive motor (15) is fixed to the rotating plate (13).

4. The lithium battery cell tab welding device according to claim 3, characterized in that: The lower end of the rotating plate (13) is fixedly connected to a fixed base (16), and a first motor (18) is fixedly connected to one side of the fixed base (16). The output end of the first motor (18) is fixedly connected to a first robotic arm (17), and a second motor (20) is fixedly connected to one side of the first robotic arm (17). The output end of the second motor (20) is fixedly connected to a welding head (19).

5. The lithium battery cell tab welding device according to claim 4, characterized in that: A connecting plate (22) is fixedly connected to one side end of the supporting circular plate (11), and the connecting plate (22) is connected to the external lifting mechanism.

6. The lithium battery cell tab welding device according to claim 5, characterized in that: A fixing pad (21) is fitted on the outside of the battery body (1).

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