发明名称 |
CHARGE STATE ESTIMATION METHOD FOR LITHIUM ION BATTERY AND CHARGE STATE ESTIMATION DEVICE FOR LITHIUM ION BATTERY |
摘要 |
Provided is a method for estimating the charge state on the basis of the voltage change rate in a lithium ion battery that uses, in the positive electrode, a lithium phosphate compound having an olivine crystal structure, and in the negative electrode, an active substance in which the electric potential is not varied by a lithium insertion/extraction reaction, the method comprising: a first step for storing a map indicating the correspondence between the voltage change rate and the charge state at a plurality of charge/discharge rates; a second step for determining present charge state candidates by referring to the map, using measured voltage change rates calculated on the basis of values measured during charging/discharging; and a third step for determining the present charge state by comparing a charge state candidate determined during charging with a charge state candidate determined during discharging. |
申请公布号 |
WO2017010475(A1) |
申请公布日期 |
2017.01.19 |
申请号 |
WO2016JP70525 |
申请日期 |
2016.07.12 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
TAKEMURA, Daigo;NISHIGUCHI, Hiroto |
分类号 |
G01R31/36;H01M4/58;H01M10/052;H01M10/42;H01M10/44;H01M10/48;H02J7/00 |
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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