Methods and apparatuses for rechargeable battery pack chargers
US6489751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2001 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Aug 7, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system, method and apparatus for charging rechargeable battery packs. A battery charger has a means to measure a voltage and a battery temperature and a means to determine a rate of increase in battery temperature of a rechargeable battery pack. The battery charger to fast charge if the voltage and battery temperature indicate its safe and to terminate the fast charge in response to the charge condition. Methods include measuring a battery temperature of the rechargeable battery pack and determining a rate of increase in battery temperature during fast charging to determine a charge condition, One method further includes terminating fast charging if the rate of increase in battery temperature exceeds a maximum rate or if the increase in battery temperature rises non-logarithmically. Another method further includes terminating fast charging in response to the charge condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.