Research on State-of-Charge (SOC) estimation using current integration based on temperature compensation
[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.
[发布日期] [发布机构] 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
[效力级别] 生态环境科学 [学科分类]
[关键词] Charge-discharge;Integral method;Measuring accuracy;Measuring errors;SOC estimations;State of charge estimations (SOC);Temperature compensation;Temperature drifts [时效性]
