System for controlling charging of secondary battery
US7391183B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2003 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Feb 22, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/007194
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To provide a system for controlling the charging of a secondary battery (battery), which is capable of keeping an initial charging/discharging characteristic of the battery in consideration of a change in environmental temperature and deterioration of the battery with elapsed time. An ordinary charging portion for performing a first charging control specified to stop the charging at a charge level less than a full-charge level is used in combination with a refresh charging portion for performing a second charging control specified to stop the charging at a charge level more than the full charge level. After the charging by the ordinary charging portion is continuously repeated by a specific number of times, for example, ten times, the next charging is performed by the refresh charging portion. The cut-off voltage used for the ordinary charging portion and refresh charging portion is determined by correcting a reference voltage VO on the basis of an environmental temperature TAO detected by an environmental temperature detecting portion. The deterioration of the battery is corrected on the basis of a reference full-charge voltage, an initial full-charge voltage Vmax(1), a present fu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.