顶盖组件及电池
By setting a locking part and a mating part in the top cover assembly, and using the interference fit between the protrusion and the groove, the problem of easy displacement of the pole post before welding is solved, which improves the production efficiency of the cell and the battery, and realizes the stability and safety of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU RED FAIRY PRECISION TECHNOLOGY CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the quality of the weld determines the stability of the electrode post, but factors such as the displacement of the upper ring can reduce the welding quality, resulting in the electrode post not being firmly fixed, leading to poor contact, open circuit or intermittent connection, which affects the normal use of the battery cell.
A top cover assembly was designed, including a top cover plate, an electrode post, an upper insulating component, and an upper ring. By setting engaging and mating parts on the top cover plate and the upper ring, and using the interference fit between the protrusion and the groove, preliminary fixation is achieved, ensuring the stability of the electrode post before welding. The fixation strength is improved by using structural components of the same material and anti-torsion design.
It improves the stability and production yield of the terminals, avoids displacement before welding, enhances the convenience and fixing strength of welding, reduces costs, and ensures the stability of current transmission and the safety of the battery.
Smart Images
Figure CN224519984U_ABST
Abstract
Claims
1. A cap assembly, characterized by, The top cover assembly includes a top cover plate, a pole, an upper insulating member, and an upper ring. The top cover plate has a through hole, and the pole is disposed in the through hole. The upper ring is fixedly disposed on the outer surface of the top cover plate and surrounds the through hole. The upper insulating member is disposed on the outer surface of the top cover plate and is disposed between the upper ring and the pole. The upper insulating member is fixedly connected to both the upper ring and the pole. The top cover plate and the upper ring are respectively provided with a locking part and a mating part. The locking part and the mating part are engaged and connected to each other, so that the top cover plate and the upper ring are connected.
2. The roof assembly of claim 1, wherein, The engaging portion is a protrusion, and the mating portion is a groove, with the protrusion and the groove being an interference fit.
3. The roof assembly of claim 2, wherein, The height of the protrusion is greater than the depth of the groove. When an external force is applied to the upper ring, the height of the protrusion decreases and it expands to both sides, so that the protrusion and the groove are in an interference fit.
4. The roof assembly of claim 2, wherein, The opening size of the groove is smaller than the bottom size of the groove, the free end size of the protrusion matches the bottom size of the groove, and the root size of the protrusion matches the opening size of the groove.
5. A roof assembly according to claim 3 or 4, wherein, The top cover and the upper ring are structural components made of the same material, and the hardness of the upper ring is higher than that of the top cover.
6. The roof assembly of any one of claims 1-4, wherein, The upper ring includes a connecting portion and an extension portion. The extension direction of the connecting portion is the same as the extension direction of the top cover plate. One end of the connecting portion is provided with the engaging portion or the mating portion. The other end of the connecting portion is connected to the extension portion. The extension portion extends in a direction away from the top cover plate. The upper insulating member covers the extension portion.
7. The roof assembly of claim 6, wherein, The connecting part is welded to the top cover plate.
8. The roof assembly of claim 1, wherein, The top cover assembly also includes an explosion-proof structure.
9. The roof assembly of claim 1, wherein, The top cover assembly also includes a lower plastic sheet, which is fixed to the inner side of the top cover sheet. The top cover sheet is provided with an injection hole, and the lower plastic sheet is provided with a buffer structure corresponding to the injection hole. The buffer structure is used to buffer the impact force of the injected electrolyte.
10. A battery, characterized by The battery includes a housing, a cell, and a top cover assembly as described in any one of claims 1-9, wherein the housing and the top cover assembly enclose a closed space, and the cell is fixed within the closed space.