盖板组件、壳体及电池
By designing a detachable sealing plate and cover plate assembly in the lithium-ion battery, independently setting the injection hole and using laser welding, the safety problem of explosion-proof valves caused by mechanical and chemical damage in lithium-ion batteries is solved, and the stability and safety of the battery under extreme conditions are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SVOLT ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing explosion-proof valves for lithium-ion batteries are prone to deformation, cracking, and leakage during repeated positive and negative pressure impacts and high-temperature baking, affecting the yield and safety performance of the cells. Furthermore, the welded structure is easily damaged under pressure changes, leading to a reduction in battery safety.
The design incorporates detachable sealing plates and cover plates with independently set injection holes. Through interference fit or snap-fit connection, it avoids contamination and mechanical damage to the explosion-proof valve during the injection process. Laser welding is used to form a high-strength sealing structure to ensure the stability of the explosion-proof valve and the safety of the battery.
It significantly improves the safety and reliability of the battery, avoids corrosion and mechanical damage to the explosion-proof valve, ensures the normal pressure relief function of the battery under extreme conditions, and enhances the overall safety and reliability of the battery cell.
Smart Images
Figure CN224519988U_ABST
Abstract
Claims
1. A cover assembly, characterized by include: The cover plate body has mounting holes. A sealing plate is detachably installed in the mounting hole. The sealing plate has an injection hole and an injection molding edge is formed along the edge of the sealing plate.
2. The cover plate assembly of claim 1, wherein, The width H of the injection molding edge is in the range of 2 mm ≤ H ≤ 5 mm.
3. The cover plate assembly of claim 1, wherein, The thickness T of the injection molding edge is in the range of 0.2 mm ≤ T ≤ 0.7 mm.
4. The cover plate assembly of claim 1, wherein, The edge of the sealing plate is interference-fitted with the inner wall of the mounting hole, and the interference amount D is in the range of 0.3 mm ≤ D ≤ 0.7 mm.
5. The cover plate assembly of claim 3, wherein, It also includes an explosion-proof valve, which is adapted to be welded to the mounting hole if the sealing plate detaches from the mounting hole.
6. The cover plate assembly of claim 5, wherein, A protective patch is also affixed to the side of the explosion-proof valve that is away from the cover plate body.
7. A housing characterized by, It includes the housing body and the cover assembly as described in any one of claims 1 to 6.
8. The case according to claim 7, characterized in that The cover plate body is welded to the housing body by laser welding.
9. A battery, characterized by Includes the cover plate assembly as described in any one of claims 1 to 6; Or the housing as described in any one of claims 7 to 8.