Research on State-of-Charge (SOC) estimation using current integration based on temperature compensation

2017 3rd International Conference on Energy, Environment and Materials Science

能源学;生态环境科学;材料科学

Yin, J.^1,2 ; Shen, Y.^1 ; Liu, X.T.^3 ; Zeng, G.J.^3 ; Liu, D.C.^1

School of Electronic and Information Engineering, Hefei Normal University, Hefei

230061, China^1

Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei

230027, China^2

New Energy Automotive Engineering Research Institute, Hefei University of Technology, Hefei

230009, China^3

关键词: Charge-discharge;    Integral method;    Measuring accuracy;    Measuring errors;    SOC estimations;    State of charge estimations (SOC);    Temperature compensation;    Temperature drifts;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/94/1/012165/pdf
DOI  :  10.1088/1755-1315/94/1/012165

来源: IOP

【 摘 要 】

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.