Battery condition indicator
US4638237A · kind A · utility
44Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1985 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Jan 3, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery condition indicator provides an indication of both the charge used and the life remaining in a rechargeable battery. The time of use of the battery between charges is measured to provide an indirect measure of the charge remaining. The total time of service of the battery is measured to provide an indirect measure of the age or life of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.