发明名称 |
Method of detecting and resolving memory effect |
摘要 |
A method of detecting and resolving a memory effect capable of detecting the memory effect with ease and with high precision and resolving even when the vehicle is in motion is provided. A current in a secondary battery is detected, a variation DELTA SOC in a residual battery capacity for a predetermined time period is calculated according to at least current integration by multiplying the detected current by a predetermined charge efficiency (S302), a temperature of the secondary battery is detected and a variation DELTA V in a no-load voltage for the predetermined time period is calculated based on the detected current, and an internal resistance corresponding to the detected temperature and the SOC is calculated (S303). A ratio k of the variation in the no-load voltage to the variation in the residual battery capacity is calculated (S304). If the ratio exceeds a predetermined threshold value kst, then the battery is judged to have a memory effect (S307), and the usage range of the SOC is extended for a predetermined time period (S308) or the correction of the SOC using voltages is prohibited for a predetermined time period(S309). <IMAGE> |
申请公布号 |
EP1271171(A3) |
申请公布日期 |
2004.02.04 |
申请号 |
EP20020013617 |
申请日期 |
2002.06.19 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
KIMURA, TADAO;TOYOTA, MASAYOSHI;YAMABE, NORITO;MURAKAMI, YUSAI |
分类号 |
H02J7/00;B60L3/00;G01R31/36;H01M10/30;H01M10/42;H01M10/48 |
主分类号 |
H02J7/00 |
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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