Full charge capacity correction circuit, charging system, battery pack and full charge capacity correction method
US8736232B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2011 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Dec 21, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/367
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A full charge capacity correction circuit including: an integrating unit that calculates an integrated current value; a capacity storing unit that stores a full charge capacity value; a first estimating unit that estimates a storage ratio, which is a ratio of a quantity of stored electricity to an actual full charge capacity, as a first storage ratio; a second estimating unit that estimates a storage ratio; a full charge capacity correction unit that estimates a new full charge capacity value, and stores the estimated new full charge capacity value; an open circuit ratio estimating unit that uses a condition in which the rechargeable battery is in an open circuit state, and estimates the storage ratio based on a terminal voltage of the rechargeable battery; and a correction control unit that uses the open circuit ratio estimating unit as the first estimating unit or the second estimating unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.