Lithium halide primary cell having end of life indicator means
US4247607A · kind A · utility
3Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1980 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Apr 28, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M2200/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a lithium halide primary cell having means to indicate its end of life. The cell includes at least one lithium anode and a cathode in contact with a major surface of the anode wherein the indicating means comprises a stepped portion on the major surface of said anode which is not in contact with the cathode. The stepped portion of the anode comprises a surface area of from about 40 to 60% of the area of the major surface in contact with the cathode and about 15 to 5% of the total thickness of said anode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.