State-of-charge estimation method, state-of-charge estimation device, and secondary-battery power system
US8903667B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Dec 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3835
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is provided a state-of-charge estimation method, a state-of-charge estimation device, and a secondary-battery power system that may quickly and stably determine the convergence value of an adjustment parameter of a voltage characteristic formula that may approximate change over time of an open-circuit voltage of a secondary battery with high precision by appropriately setting the initial value of the adjustment parameter. At step S14, a selected voltage measurement values V1, VMbi ((i=1 to (n−1)), and VMm are used to calculate an initial value A0i (i=1 to n) of an adjustment parameter Ai (i=1 to n). In addition, at step S15, an integer string bi (i=1 to (n−1)) and a real number C are used to calculate an initial value B01 (i=1 to n) of an adjustment parameter Bi (i=1 to n).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.