Battery pack, method for charging/discharging counting and method for setting residual capacity of the battery pack
US6587799B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2002 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Jun 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus for computing residual battery capacity of a battery pack enable: storing a plurality of correction coefficients for calculating said residual battery capacity for said battery pack at a plurality of pre-set temperatures; detecting a temperature of a battery cell of said battery pack; and at least one of: (i) if a correction coefficient associated with said detected temperature is stored, said residual battery capacity is computed based on said correction coefficient and a voltage of said battery cell; and (ii) if said correction coefficient associated with said detected temperature is not stored, stored correction coefficients associated with preset temperatures above and below said detected temperature are used to compute a correction coefficient associated with said detected temperature and said residual battery capacity is computed based on said computed correction coefficient and said voltage of said battery cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.