一种电池盖板及电池
By designing through holes and pressure relief channels on the battery cover, the movement of the explosion-proof ball enables automatic pressure relief of the hard-shell battery, solving the problem that the hard-shell battery cannot be depressurized under high pressure, and ensuring battery safety and energy density.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HIGHPOWER TECH CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-17
AI Technical Summary
Hard-shell lithium batteries may explode when overcharged, short-circuited, subjected to high temperatures, or physically compressed, as the internal gas pressure increases rapidly and cannot be automatically released.
Design a battery cover plate comprising a cover plate body, terminals, an explosion-proof ball, a first insulating component, and a second insulating component. By setting through holes and pressure relief channels, the explosion-proof ball automatically releases pressure under air pressure, thereby realizing the automatic pressure relief function of the hard-shell battery.
It enables automatic pressure relief of hard-shell batteries under high voltage conditions, preventing explosions and maintaining battery safety and energy density.
Smart Images
Figure CN224519995U_ABST
Abstract
Claims
1. A battery cover, characterized in that, Includes the cover plate body, pole post, explosion-proof ball, first insulating component and second insulating component; The second insulating member is an elastic member and is stacked with the first insulating member between the cover plate body and the pole post. The first insulating member is located on the side of the second insulating member facing away from the cover plate body. The first insulating member has a first through hole for allowing gas inside the battery to enter. The second insulating member has a second through hole communicating with the first through hole. A pressure relief channel communicating with the first through hole is provided between the first insulating member and the second insulating member. The cover plate body has a through hole communicating with the second through hole. The size of the first through hole and the size of the second through hole are both smaller than the size of the explosion-proof ball. One end of the explosion-proof ball is confined within the first through hole, and the other end of the explosion-proof ball is confined within the second through hole. The size of the third through hole is larger than the size of the second through hole.
2. The battery cover plate of claim 1, wherein, The pole passes through the first insulating member and the second insulating member in sequence and then protrudes outward relative to the cover plate body. The pole includes a connected pole body and a flange. The pole body protrudes outward relative to the cover plate body. The first insulating member and the second insulating member are connected between the cover plate body and the flange. The cover plate body, the second insulating member, the first insulating member and the flange are hot-pressed together as one unit.
3. The battery cover plate of claim 2, wherein, The flange portion is provided with a through hole corresponding to the first through hole, and a fourth through hole communicating with the first through hole. The fourth through hole is also used to allow gas inside the battery to enter.
4. The battery cover plate of claim 3, wherein, The size of the fourth through hole is larger than the size of the first through hole.
5. The battery cover plate of claim 3, wherein, The distance from the center line of the fourth through hole to the edge of the pole body and the distance to the edge of the flange are both greater than 2mm.
6. The battery cover plate of claim 1, wherein, The explosion-proof ball is a brittle ball.
7. The battery cover plate of claim 1, wherein, The explosion-proof ball is an elastic ball.
8. The battery cover plate of claim 1, wherein, The dimensions of the first through hole and the second through hole are both 0.25mm-0.55mm smaller than the dimensions of the explosion-proof ball.
9. A battery, characterized by The battery includes a housing, a battery cell, and a battery cover plate as described in any one of claims 1 to 8. The housing has a mounting groove, the battery cell is housed in the mounting groove, the terminal post is electrically connected to the battery cell, and the cover plate body seals the opening of the mounting groove.