一种可实现排气补液的盖帽
By designing a cap that allows for venting and fluid replenishment, and utilizing a combination of explosion-proof aluminum sheets and metal nails, the problem of the inability to vent again after the lithium battery is finished is solved, achieving stable sealing during multiple disassembly and installation, and extending battery life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU WUJIN ZHONGRUI ELECTRONICS
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-17
AI Technical Summary
Lithium batteries cannot be vented again after they are manufactured, which can affect battery life when the internal pressure reaches the limit threshold.
A cap for venting and replenishing fluid was designed, comprising an explosion-proof aluminum sheet, a metal nail, and a sealing ring. The explosion-proof aluminum sheet has a two-stage venting channel. The gap between the metal nail and the explosion-proof aluminum sheet is filled by the sealing ring. The screw cap compresses the sealing ring to ensure sealing. The sealing ring is clamped between the outer circumference of the metal nail and the inner wall of the stepped hole.
It achieves stable sealing even after multiple disassembly and reassembly, ensuring the airtightness of the battery. Even if the threaded section is uncoiled, it can maintain overall sealing and extend battery life.
Smart Images
Figure CN224520155U_ABST
Abstract
Claims
1. A vented closure capable of vented refilling, characterized in that, include: An explosion-proof aluminum sheet (1) is provided, wherein a two-section exhaust channel (11) is formed on the explosion-proof aluminum sheet (1). The exhaust channel (11) includes a first stepped hole (111) adjacent to the inside of the battery and a second stepped hole (112) adjacent to the outside of the battery. The inner diameter of the first stepped hole (111) is smaller than the inner diameter of the second stepped hole (112). An internal thread is formed on the inner wall of the first stepped hole (111). A metal nail (2), the metal nail (2) includes a threaded section (21) and a screw cap (22) located at one end of the threaded section (21) and radially outwardly flared, the threaded section (21) fits in the first stepped hole (111), the screw cap (22) fits in the second stepped hole (112), and a receiving groove (23) is formed at one end of the screw cap (22) near the threaded section (21); A sealing ring (3) is disposed in the receiving groove (23). When the metal nail (2) is screwed into the exhaust channel (11), the screw cap (22) squeezes the sealing ring (3) so that the sealing ring (3) seals the gap between the metal nail (2) and the explosion-proof aluminum sheet (1).
2. The vented overcap of claim 1, wherein, The compressed sealing ring (3) is clamped between the outer peripheral surface of the metal nail (2) and the inner wall surface of the second stepped hole (112).
3. The vented overcap of claim 1, wherein, The screw cap (22) has a slot (24) on the end face away from the threaded section (21) for use with an external tightening tool.
4. The vented closure of claim 1, wherein, The sealing ring (3) is made of a deformable soft material.
5. The vented overcap of claim 1, wherein, The metal nail (2) is made of aluminum material using a cold heading process combined with a wire rolling process.
6. The vented overcap of claim 1, wherein, The explosion-proof aluminum sheet (1) is made of aluminum material by stamping, and the internal thread at the first stepped hole (111) is formed by extrusion tap.