Overdischarge protection for rechargeable cells
US4873158A · kind A · utility
7Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Sep 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rechargeable electrochemical cell which resists venting in an over-discharge condition. A first microporous membrane is provided as a separator between the cell's anode and cathode, which allows for the passage of cell electrolyte, but inhibits the passage of metal dendrites. A tab extends from the anode to the cell casing and between the tab and inner wall of the cell casing is provided a second microporous membrane characterized as being less resistant to the passage of alkaline metal dendrites than the first microporous membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.