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Lithium ion battery state of charge estimation method and lithium ion battery state of charge estimation device
Lithium ion battery state of charge estimation method and lithium ion battery state of charge estimation device
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机译：锂离子电池充电状态估计方法和锂离子电池充电状态估计装置
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摘要
A method of estimating a state of charge of a lithium ion battery, which uses a lithium phosphate compound having an olivine-type crystal structure for a positive electrode and uses an active material exhibiting no potential fluctuation due to an insertion/desorption reaction of lithium for a negative electrode, based on a voltage change rate. The method includes: storing a map representing a correspondence relationship between the voltage change rate and the state of charge at a plurality of charging/discharging rates; obtaining a candidate for a present state of charge from an actually measured voltage change rate, by referring to the map; and obtaining the present state of charge through a comparison between the candidate for the state of charge obtained during the charging and the candidate for the state of charge obtained during the discharging.
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