Power supply unit, vehicle and storage battery unit equipped with power supply unit, and remaining capacity detecting method of battery
US9658293B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2013 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | Apr 14, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3842
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A power supply unit comprises a battery, current and voltage detecting portions, and a remaining capacity computing portion. The remaining capacity computing portion comprises a first computing portion computing a first open circuit terminal voltage based on current and voltage values from the current and voltage detecting portions, and computing a first remaining capacity based on the first open circuit terminal voltage, a second computing portion computing a second open circuit terminal voltage based on the current and voltage values, an ohmic resistance voltage drop and a polarization resistance voltage drop, and computing a second remaining capacity based on the second open circuit terminal voltage, a third computing portion calculating a third remaining capacity based on an integrated value by integrating the current, and a main computing portion computing a real remaining capacity of the battery based on the first and/or third remaining capacity, and the second remaining capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.