Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (2): 487-502.doi: 10.19799/j.cnki.2095-4239.2021.0409

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Multiscale nonuniformity of lithium-ion batteries

Lan SONG(), Ruoyu XIONG, Huaxiong SONG, Penghui TAN, Yun ZHANG(), Huamin ZHOU   

  1. State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
  • Received:2021-08-09 Revised:2021-09-12 Online:2022-02-05 Published:2022-02-08
  • Contact: Yun ZHANG E-mail:slan_song@foxmail.com;marblezy@hust.edu.cn

Abstract:

Strict use requirements such as high endurance, long cycle, fast charging, and high safety of power batteries are driving the innovation of lithium-ion battery technology. However, this also makes the uniformity problem of batteries from the granular material to the cell level become prominent, and it has become a key factor in determining the overall performance of batteries. Studying the causes of multiscale nonuniformity of lithium-ion batteries and improvement strategies are important issues that need to be resolved in the current battery manufacturing and battery management. This overview systematically summarizes the influence of lithium-ion battery material particles, electrode microstructure, electrode plane, and cell monomer's nonuniform characteristics on the electrochemical uniformity of batteries and the evolution law during a battery cycle and focuses on the mechanism of nonuniformity damage to battery performance through the inherent parallel electrical structure. Finally, specific improvement measures are put forward for the nonuniformity of various scales.

Key words: lithium-ion battery, non-uniformity, multi-scale, parallel structure

CLC Number: