Cylindrical battery cover plate assembly and battery
By designing the recessed area and matching the raised structure in the battery cover assembly, the problems of welding instability and welding slag residue are solved, and an efficient and safe welding process is achieved.
Patent Information
- Application Number
- CN202422329623.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-09-24
AI Technical Summary
In existing battery cover assembly, the welding of the busbar and the pole column is unstable, the welding quality is poor, the production yield is low, and the welding slag is prone to remain in the gap, causing the risk of short circuit, which affects safety.
A cylindrical battery cover assembly is designed. By setting a recessed area on the lower bus plate and a matching raised structure on the upper bus plate, the welding position is transferred from the center to the edge to ensure that the welding is easy to observe and the welding slag is easy to remove. The upper collecting disk and the lower bus plate are welded at the outer circumference position.
Improve production yield and efficiency, avoid short circuits and safety risks caused by welding slag residue, and achieve efficient welding.
Smart Images
Figure CN223297005U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery structural parts, in particular to a cylindrical battery cover assembly and a battery. Background Art
[0002] In the existing battery cover assembly, after the busbar and the lower end of the pole are embedded, the diameter of the ring is small, and the peripheral welding requires the laser beam to be introduced from the side, with a large radial stroke, which is not conducive to the stability of the optical path, thereby affecting the welding weld width and welding quality, resulting in low production yield and slow efficiency. In addition, since space is reserved for welding the busbar ring and the pole, there is a gap between the busbar and the upper cover. The welding slag generated by the peripheral welding is not easy to remove and is easily retained in the gap, thereby being introduced into the battery cell, causing short circuits and even safety risks. In response to the above defects, the present application is proposed. Utility Model Content
[0003] The purpose of the utility model is to provide a cylindrical battery cover assembly and a battery, which are used to solve the problems of low yield and slow efficiency in the production of traditional battery covers, as well as the problem of easy residue of welding slag and foreign matter.
[0004] In order to solve the above problems, the utility model provides a cylindrical battery cover assembly, including a lower busbar and an upper busbar, the lower busbar is provided with a recessed area for installing the upper busbar, the upper busbar includes an upper collecting plate and a pole, the pole is connected to the upper collecting plate, and the upper collecting plate is provided with a matching protrusion structure, which can be snapped into the recessed area on the lower busbar to play a positioning role. The upper collecting plate and the lower collecting plate form a welding position at the outer circumference, thereby transferring the welding position from the center to the edge, making the welding process easy to observe, the welding slag easy to blow off, and not blocking the welding light path, thereby achieving high production yield and efficiency of assembly welding, and at the same time avoiding short circuits and safety risks of battery cells caused by residual welding slag.
[0005] Optionally, the recessed area on the lower busbar is surrounded by positioning protruding structures arranged in a ring shape, or is formed by a downward recess inside the lower busbar.
[0006] Optionally, the positioning protrusion structure is a complete ring or discontinuous protrusions arranged in a ring track.
[0007] Preferably, the matching protrusion structure is formed by bending the upper collecting plate, and the positioning protrusion structure is formed by folding the lower collecting plate.
[0008] Optionally, the mating protrusion structure is annular or discontinuous protrusions are arranged in an annular track.
[0009] According to an embodiment of the present invention, the cross-section of the mating protrusion structure is square, thereby obtaining a larger contact area and a closer contact with the lower busbar.
[0010] According to an embodiment of the present invention, the upper busbar further includes an upper plastic, an aluminum cover plate and a lower plastic.
[0011] According to an embodiment of the present invention, a sealing ring is provided between the aluminum cover and the lower plastic.
[0012] Preferably, the upper collecting plate is flush with the edge of the lower collecting plate.
[0013] A battery comprises the above-mentioned cylindrical battery cover assembly.
[0014] The beneficial effect of the present invention is that by pre-welding the poles on the upper busbar, and then welding the upper busbar as a whole to the periphery of the outer ring of the lower busbar, the welding position is transferred from the center to the edge, the welding process is easy to observe, the welding slag is easy to blow off, and the welding light path is not blocked, thereby achieving high production yield and efficiency of assembly welding, and at the same time avoiding short circuits and safety risks of battery cells caused by residual welding slag. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0016] Figure 1 It is an overall cross-sectional view of the cylindrical battery cover assembly;
[0017] Figure 2 This is a schematic diagram of the explosion structure of the upper busbar;
[0018] Figure 3 This is the plan view of the upper manifold;
[0019] Figure 4 This is the plan view of the lower manifold. DETAILED DESCRIPTION
[0020] The following description is intended only to disclose the present invention and to enable those skilled in the art to implement the present invention. The embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.
[0021] [Example 1]
[0022] A cylindrical battery cover assembly, such as Figure 1 , including a lower busbar 7 and an upper busbar 8.
[0023] Upper busbar 8 Figure 1 、 Figure 2It includes an upper plastic 1, an aluminum cover 2, a sealing ring 3, a lower plastic 5, an upper collecting plate 6 and an electrode 4 arranged in sequence from top to bottom, wherein the upper plastic 1, the aluminum cover 2, the sealing ring 3, the lower plastic 5, the upper collecting plate 6 are arranged in sequence from top to bottom, and the pole 4 is connected to the upper collecting plate 6. During assembly, the above components are pre-assembled into an integrated component, namely the upper collecting plate 8.
[0024] A mating protrusion structure 61 is provided on the bottom of the upper collecting plate 6, i.e., the end face on the side in contact with the lower collecting plate 7. In order to facilitate processing and reduce costs, the mating protrusion structure 61 is formed by bending the upper collecting plate 6. At the same time, in order to obtain a tight fitting effect and a larger contact area, the mating protrusion structure 61 is annular and the cross-section is set to a square, thereby obtaining a larger contact area and a closer contact with the lower collecting plate 7.
[0025] like Figure 4 The lower bus plate 7 is provided with a recessed area for installing the upper bus plate 8. In this embodiment, the recessed area is surrounded by positioning protrusion structures 71 arranged in a complete ring shape, and the positioning protrusion structure 71 is formed by the folding edge of the lower bus plate 7.
[0026] like Figure 1 The upper collecting plate 6 and the lower collecting plate 7 form a welding position 9 at the outer circumference, thereby transferring the welding position from the center to the edge. The welding process is easy to observe, the welding slag is easy to blow off, and the welding light path is not blocked, thereby achieving high production yield and efficiency of assembly welding, while avoiding short circuits and safety risks of battery cells caused by residual welding slag.
[0027] Furthermore, the edges of the upper collecting plate 6 and the lower collecting plate 7 are flush.
[0028] By pre-welding the poles to the upper busbar 8 and then welding the upper busbar 8 as a whole to the outer periphery of the lower busbar 7, the problems of low efficiency and poor quality of welding the poles and busbars in traditional cover plates, as well as the problem of residual welding slag inside the battery, are solved.
[0029] Example 2: Based on Example 1, the lower bus plate 7 is provided with air holes 72 and a cross-shaped thickened area 73. The setting of the thickened area 73 ensures the high-rate current flow capacity of the lower bus plate 7, while not affecting the bending performance of the thin disk body in other positions. In the subsequent shell insertion process, the thin disk body is easy to bend and the welding difficulty is low, thereby improving production efficiency and production yield.
[0030] A battery comprises the above-mentioned cylindrical battery cover assembly.
[0031] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations and modifications may be made to the embodiments of the present invention without departing from the principles described.
Claims
1. A cylindrical battery cover assembly, characterized in that: The utility model comprises a lower collector plate (7) and an upper collector plate (8), wherein the lower collector plate (7) is provided with a recessed area for installing the upper collector plate (8), and the upper collector plate (8) comprises an upper collector plate (6) and a pole (4), wherein the pole (4) is connected to the upper collector plate (6), and the upper collector plate (6) is provided with a matching protrusion structure (61), wherein the matching protrusion structure (61) can be buckled in the recessed area on the lower collector plate (7), and the upper collector plate (6) and the lower collector plate (7) form a welding position (9) at an outer circumferential position.
2. The cylindrical battery cover assembly according to claim 1, characterized in that: The recessed area on the lower collecting plate (7) is surrounded by positioning protruding structures (71) arranged in a ring shape.
3. The cylindrical battery cover assembly according to claim 2, characterized in that: The positioning protrusion structure (71) is in the shape of a complete ring.
4. The cylindrical battery cover assembly according to any one of claims 1 to 3, characterized in that: The matching protrusion structure (61) is formed by bending the upper collecting plate (6).
5. The cylindrical battery cover assembly according to claim 3, characterized in that: The matching protrusion structure (61) is arranged in an annular shape.
6. The cylindrical battery cover assembly according to claim 5, characterized in that: The cross-section of the matching protrusion structure (61) is square.
7. The cylindrical battery cover assembly according to any one of claims 1 to 3, characterized in that: The upper busbar (8) further comprises an upper plastic (1), an aluminum cover plate (2) and a lower plastic (5).
8. The cylindrical battery cover assembly according to claim 7, characterized in that: A sealing ring (3) is provided between the aluminum cover plate (2) and the lower plastic (5).
9. The cylindrical battery cover assembly according to claim 8, characterized in that: The upper collecting plate (6) is flush with the edge of the lower collecting plate (7).
10. A battery, characterized in that: A cylindrical battery cover assembly comprising any one of claims 1 to 9.