Battery capacity test method and apparatus
US6114838A · kind A · utility
34Cited by
18References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Dec 2, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/389
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A battery capacity tester method and apparatus are provided. The battery capacity tester determines the present internal battery impedance by measuring terminal voltages during successive applications of a known load, each load drawing a predetermined current from the battery. This calculated internal battery impedance is used to determine battery capacity based on a precharacterization of the battery that establishes a relationship between the internal battery impedance and the remaining battery capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.