State-of-charge estimating apparatus
US8975897B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2010 |
| Grant date | Mar 10, 2015 |
| Priority date | — |
| Expiry date | May 20, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/396
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A state-of-charge estimating apparatus includes at least a first arithmetic unit configured to calculate, as a first estimation value, the present estimation value calculated based on a battery capacity, the last estimation value, and an electric current flowing in and out between a current control apparatus, which controls charge and discharge amounts of a power storage apparatus, and the power storage apparatus, and a second arithmetic unit configured to calculate, during constant current control, as the present value of a second estimation value, an estimation value calculated based on an equivalent circuit model of a battery and a voltage of the battery and, on the other hand, calculate, during constant voltage control, as the second estimation value, the present estimation value calculated taking into account a resistance change of the battery based on the equivalent circuit model of the battery and the voltage of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.