Administrator by China Associction for Science and Technology
Sponsored by China Society of Automotive Engineers
Published by AUTO FAN Magazine Co. Ltd.

Automotive Engineering ›› 2020, Vol. 42 ›› Issue (4): 445-453.doi: 10.19562/j.chinasae.qcgc.2020.04.005

Previous Articles     Next Articles

Estimation of Charge Transfer Resistance of Lithium Ion BatteryUnder Different Temperature and State of Charge

Li Rikang1, Wang Xueyuan1,2, Dai Haifeng1 & Wei Xuezhe1   

  1. 1.Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804;
    2.College of Electronic and Information Engineering, Tongji University, Shanghai 201804
  • Online:2020-04-25 Published:2020-05-12

Abstract: Combining the pseudo-two-dimensional model and the aging mechanism of the lithium ion battery, an electrochemical model is built. Based on the model, a conversion method of the charge transfer resistance at different state of charge and temperatures is proposed. The corresponding charge transfer resistance is obtained from the electrochemical impedance spectra of different temperatures and state of charge after four different aging cycles and the conversion method is used to convert the charge transfer resistance at different conditions. The results show that the average error of the conversion is less than 9%. It provides a new idea for battery life state estimation by using the charge transfer resistance at different temperatures and state of charge

Key words: Lithium-ion battery, pseudo two-dimensional model, battery aging, electrochemical impedance spectroscopy, charge transfer resistance