CPC G01R 31/367 (2019.01) [G01R 31/3835 (2019.01); G01R 35/005 (2013.01)] | 18 Claims |
1. A method for battery SOC correction, comprising:
acquiring a voltage-SOC variation curve of a battery during a charging process;
generating a voltage differential curve of the battery according to the voltage-SOC variation curve, the voltage differential curve being a variation curve of a differential value with SOC, the differential value being a ratio of a voltage variation to a SOC variation corresponding to the voltage variation during the charging process;
determining a peak point on the voltage differential curve, the peak point being between any two adjacent plateaus on the voltage-SOC variation curve and not located on the any two adjacent plateaus;
performing SOC correction on the basis of the peak point,
wherein the generating a voltage differential curve of the battery according to the voltage-SOC variation curve comprises:
for each time,
acquiring N incremental voltages on the voltage-SOC variation curve, recording moments corresponding to the N incremental voltages, and calculating SOC variations corresponding to the N incremental voltages, wherein N is a positive integer greater than or equal to 5, and
calculating N−1 differential values on the basis of the N incremental voltages and the SOC variations corresponding to the N incremental voltages; and
generating the voltage differential curve on the basis of the N−1 differential values calculated each time.
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