STATE-OF-CHARGE ESTIMATION METHOD
STATE-OF-CHARGE ESTIMATION METHOD
- New search for: OKABE HIROTO
- New search for: OKABE HIROTO
Provided is a state-of-charge estimation method that includes: obtaining a plurality of pseudo-SOC values before depolarization, based on a cell voltage after a battery 11 is continuously charged or discharged and the charging or discharging is stopped; setting an initial value for an estimated SOC value that is estimated as a post-depolarization SOC; obtaining a Δ-pseudo-SOC value that is a difference between each of the pseudo-SOC values and the estimated SOC value; obtaining a correlation between a square of the Δ-pseudo-SOC value and a rate of change of the Δ-pseudo-SOC value; classifying the correlation into a first region in which there is non-linear change and a second region in which there is linear change, and obtaining a regression line for the second region; and using the regression line to correct the estimated SOC value such that the estimated SOC value approaches a post-depolarization true SOC value.
Document information
STATE-OF-CHARGE ESTIMATION METHOD
2024-05-02
Patent
Electronic Resource
English
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