Energy Storage Science and Technology ›› 2019, Vol. 8 ›› Issue (6): 1182-1189.doi: 10.12028/j.issn.2095-4239.2019.0139

Previous Articles     Next Articles

Research and characterization of pulse charging strategy for lithium-ion traction battery

CHEN Liduo1, JI Dengyue2, XU Yue1, ZHANG Jinjie1, MA Tianyi1, WEI Mohan1   

  1. 1 CATARC Automotive Test Center(Tianjin) Co., Ltd, China Automotive Technology and Research Center Co., Ltd, Tianjin Key Laboratory of Evaluation Technology for Electric Vehicles, Tianjin 300300, China;
    2 Ningde Amperex Technology Ltd, Research Institute, Ningde 352100, Fujian, China
  • Received:2019-06-20 Revised:2019-07-01 Online:2019-11-01 Published:2019-07-31

Abstract: Charging strategies of traction battery play a crucial role in improving the performance and life of electric vehicles. In this paper, the pulse charging strategy for a ternary material system 18650 cylindrical battery is studied, and it is compared with the standard constant current and constant voltage charging strategy. The impact of the key parameters of the pulse charging strategy on the electrical performance is comprehensively and objectively analyzed. The impact of the pulse charging strategy on battery life was systematically evaluated. In the aspect of cycle life research, electrochemical Impedance Spectroscopy (EIS) was used to analyze the AC impedance under different cycles and SOC, and the cell structure was characterized by X-ray tomography (CT) nondestructive analysis. The relationship between the pulse charging strategy and the cycle performance and structure of the battery is revealed.

Key words: traction battery, 18650 cylindrical battery, charging strategy, pulse charging, cycle life

CLC Number: