Sealed battery with internal pressure activated safety mechanism
US6555263B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Oct 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sealed battery includes a can for receiving an electric generator, the can having an opened top end, a deformable plate air tightly mounted on the opened top with a gasket disposed between the deformable plate and an inner wall of the opened top end, a terminal cap disposed on the deformable plate, the terminal cap being elevated except for an edge, and a circuit breaker disposed between the deformable plate and the terminal cap to cut-off current flow when the deformable plate is deformed by internal pressure increased above an allowable level. The circuit breaker includes a insulating plate having a bridge disposed traversing above the deformable plate and provided with a mechanically weak portion and a via hole, the mechanically weak portion being severed when the deformable plate is deformed by internal pressure increased above a predetermined level, an upper conductive layer formed on an upper surface of the insulating plate, and a terminal member disposed through the via hole to electrically connect the upper conductive layer to the deformable plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.