System for indicating a low battery condition
US5365453A · kind A · utility
201Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Apr 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3842
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for accurately predicting impending battery failure in battery powered electronic and electrical devices. The system continually monitors changes in battery voltage responsive to load changes and calculates a ratio of the change in voltage to the change in load. When the ratio exceeds a certain threshold value, indicating that the impedance of the battery has risen to near its final value, a user warning indication is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.