Method and apparatus of correcting battery characteristic and of estimating residual capacity of battery
US6160380A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1998 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Oct 22, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus of estimating a residual energy of a battery for an electric vehicle. A battery characteristic is corrected on the basis of a temperature correction factor and a deterioration correction factor which are obtained on the basis of the condition of the battery. The deterioration correction factor includes an internal resistance deterioration correction factor indicative of a deterioration ratio of a battery internal resistance and a energy deterioration correction factor indicative of a deterioration ratio of a battery energy. The residual capacity is calculated on the basis of the corrected battery characteristic, a discharge current and a terminal voltage of the battery. Therefore, a residual energy meter accurately displays a residual energy of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.