| 摘要 |
PROBLEM TO BE SOLVED: To accurately detect full capacity without fully discharging or fully charging a battery. SOLUTION: A full battery capacity detection method includes a capacity variation detection step, an open-circuit voltage detection step, a remaining capacity determination step, a remaining capacity variation rate calculation step, and a full capacity calculation step. The capacity variation detection step calculates a capacity variation valueδAh of a battery between first detection timing and second detection timing. The open voltage detection step detects first and second open voltages V<SB>OCV1</SB>and V<SB>OCV2</SB>of the battery at the first and second detection timing, respectively. The remaining capacity determination step determines first and second remaining capacities SOC<SB>1</SB>[%] and SOC<SB>2</SB>[%] of the battery based on the first and second open voltages V<SB>OCV1</SB>and V<SB>OCV2</SB>, respectively. The remaining capacity variation rate calculation step calculates a remaining capacity variation rateδS[%] based on the difference between the first and second remaining capacities SOC<SB>1</SB>[%] and SOC<SB>2</SB>[%]. The full capacity calculation step calculates a full capacity Ahf of the battery based on the remaining capacity variation rateδS[%] and the capacity change valueδAh. COPYRIGHT: (C)2009,JPO&INPIT
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