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Published by AUTO FAN Magazine Co. Ltd.

›› 2018, Vol. 40 ›› Issue (12): 1413-1417.doi: 10.19562/j.chinasae.qcgc.2018.012.006

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A Study on ‘Breathing Effect’ of Traction Batteries for Electric Vehicles

Xu Chengshan1,2, Lu Languang2,3, Ouyang Minggao2, Jiang Fachao1   

  1. 1.College of Engineering, China Agricultural University, Beijing 100083;
    2.Tsinghua University, State Key Laboratory of Automotive Safety and Energy, Beijing 100084;
    3.Collaborative Innovation Center for Electric Vehicles, Beijing 100081
  • Received:2017-10-31 Online:2018-12-25 Published:2018-12-25

Abstract: ‘Breathing effect’ appearing in vehicle lithium traction battery during its charge and discharge due to the intercalation and de-intercalation of lithium ion is greatly affected by electrode material, ambient temperature and charging and discharging current rates as well as the battery state of health. In this paper, a test rig for measuring the thickness of a Li-ion battery is designed and built to study the ‘breathing effect’ of battery under different current rates and temperatures. The results show that the higher current rate and lower temperature result in the weaker breathing effect of battery.

Key words: breathing effect, lithium intercalation and de-intercalation, charge and discharge current rate, temperature