发明名称 |
SECONDARY BATTERY CAPACITY MEASUREMENT SYSTEM AND SECONDARY BATTERY CAPACITY MEASUREMENT METHOD |
摘要 |
A secondary battery capacity measurement system includes a data convertor, an SOC computer, and a maximum capacity computer. The data convertor determines a partial derivative characteristic curve of a capacity-to-voltage derivative over voltage, the partial derivative characteristic curve indicating a characteristic of a capacity-to-voltage derivative, from a set of historical data of time-sequentially-measured values of voltage and current. The SOC computer computes a difference between the partial derivative characteristic curve and a reference derivative curve indicating a reference characteristic of the capacity-to-voltage derivative, and fits the partial derivative characteristic curve to the reference derivative curve by reducing the difference to estimate an SOC. The maximum capacity computer estimates a maximum value of capacity, from the partial derivative characteristic curve and the reference derivative curve. The reference derivative curve is given by a complex of first and second characteristic derivative curves respectively derived from positive and negative electrode materials. |
申请公布号 |
EP2990818(A2) |
申请公布日期 |
2016.03.02 |
申请号 |
EP20150181050 |
申请日期 |
2015.08.14 |
申请人 |
YOKOGAWA ELECTRIC CORPORATION |
发明人 |
TORAI, SOICHIRO;NAKAGOMI, MASARU |
分类号 |
G01R31/36;H01J7/00;H01M10/44 |
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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