发明名称 |
DEVICE FOR MEASURING STATE OF CHARGE OF SECONDARY BATTERY AND METHOD FOR MEASURING STATE OF CHARGE OF SECONDARY BATTERY |
摘要 |
A technology described herein is for accurately determining the SOC of a secondary battery. An open-circuit-voltage-to-state-of-charge (OCV-SOC) characteristic has a capacity decrease estimation OCV region in which a relationship between the OCV and the SOC is assumed not to change due to degradation of the secondary battery 1a since a reference time point. Charge currents or discharge currents in the capacity decrease estimation OCV region are accumulated in a process in which the secondary battery SOC changes among OCVs. From the accumulation, an accumulated current is obtained. A secondary battery capacity decrease is estimated based on the accumulated current. An OCV-SOC characteristic is specified based on the estimated secondary battery capacity decrease and a predetermined relationship between the battery capacity decrease of the secondary battery since the reference time point and the OCV-SOC characteristic. A secondary battery SOC is determined based on the OCV and the specified OCV-SOC characteristic. |
申请公布号 |
EP2527855(A4) |
申请公布日期 |
2015.09.30 |
申请号 |
EP20110734626 |
申请日期 |
2011.01.18 |
申请人 |
GS YUASA INTERNATIONAL LTD. |
发明人 |
NAKAMURA, MASASHI;HASEGAWA, HIDEFUMI |
分类号 |
G01R31/36;H01M4/36;H01M10/42;H01M10/48 |
主分类号 |
G01R31/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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