Battery cell with improved pressure relief vent
US7195839B2 · kind B2 · utility
2Cited by
23References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2003 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Jul 9, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrochemical cell with a pressure relief vent formed in a metal plate disposed in at least one of the closed end and the open end of the container. The pressure relief vent has an annular ring that includes a reduced thickness groove, interrupted in at least two places by unthinned sections of the plate. When the vent opens to relieve pressure from within the cell, the area of the plate within the annular ring remains attached to the remainder of the plate by at least one of the unthinned sections. A can with such a pressure relief vent formed in the can bottom is useful as an electrochemical cell container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.