Research on State-of-Charge (SOC) estimation using current integration based on temperature compensation
Jing Hua Yin, Yan Shen, Xincong Liu, Guojian Zeng, Danzhe Liu · IOP Conference Series Earth and Environmental Science · 2017
The traditional current integral method for the state-of-charge (SOC) estimation has an unusable estimation accuracy because of the current measuring error. This paper proposed a closed-loop temperature compensation method to improve the SOC estimation accuracy of current integral method by eliminating temperature drift. Through circuit simulation result in Multisim, the stability of current measuring accuracy is improved by more than 10 times. In a designed 70 charge-discharge experimental circle, the SOC estimation error with temperature compensation had 30 times less than error in normal situation without compensation.