发明名称 |
State estimating device of secondary battery |
摘要 |
A battery state estimating unit estimates an internal state of a secondary battery according to a battery model equation in every arithmetic cycle, and calculates an SOC based on a result of the estimation. A parameter characteristic map stores a characteristic map based on a result of actual measurement performed in an initial state (in a new state) on a parameter diffusion coefficient and a DC resistance in the battery model equation. The parameter change rate estimating unit estimates a DC resistance change rate represented by a ratio of a present DC resistance with respect to a new-state parameter value by parameter identification based on the battery model equation, using battery data measured by sensors as well as the new-state parameter value of the DC resistance corresponding to the present battery state and read from the parameter characteristic map. |
申请公布号 |
US8108161(B2) |
申请公布日期 |
2012.01.31 |
申请号 |
US20080449390 |
申请日期 |
2008.03.13 |
申请人 |
TOMURA SHUJI;UMENO TAKAJI;AMANO YASUSHI;NISHI YUJI;TAKEMOTO TAKESHI;HAGA NOBUYASU;FUCHIMOTO TETSUYA;KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO;TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
TOMURA SHUJI;UMENO TAKAJI;AMANO YASUSHI;NISHI YUJI;TAKEMOTO TAKESHI;HAGA NOBUYASU;FUCHIMOTO TETSUYA |
分类号 |
G01R31/36;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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