Energy Storage Science and Technology ›› 2023, Vol. 12 ›› Issue (2): 529-535.doi: 10.19799/j.cnki.2095-4239.2022.0584

• Energy Storage Test: Methods and Evaluation • Previous Articles     Next Articles

Quantitative analysis of the lithium plating-stripping process of lithium-ion batteries using external characteristic methods

Yulong ZHANG(), Weiling LUAN(), Senming WU   

  1. CPCIF Key Laboratory of Power Battery Systems and Safety, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2022-10-09 Revised:2022-10-19 Online:2023-02-05 Published:2023-02-24
  • Contact: Weiling LUAN E-mail:zhangyl.work@foxmail.con;luan@ecust.edu.cn

Abstract:

The lithium-ion batteries (Libs) have been widely used due to their advantages of high energy density and long cycle life. However, the associated lithium plating can cause irreversible capacity fading, reduce the self-heating temperature, and lead to safety hazards, although the lithium stripping process can partially alleviate the effect of lithium plating on the battery. In this paper, the batteries are placed for cycling at low temperatures. The external characteristic methods, which contain the differential voltage analysis (DVA), voltage relaxation profile (VRP), and DVA-VRP, are assessed to quantitatively analyze the reversible lithium stripping process by collecting and analyzing the cycling process of the batteries. The results are verified by the electrochemical model. The present study shows that the features of the DVA and VRP shift along with battery aging. The eigenvalues of these methods are linearly related, and the fitting line shifts downward with the extending rest-time. The results show that the VRP method is more accurate and more time-consuming, whereas the DVA method has higher accuracy in the preliminary stage and the deviation gradually increases with battery aging. The DVA-VRP method can effectively retain accuracy without the disadvantages of large errors and high time costs, and it can also estimate the reversible lithium of the battery in a short time. The method can be used to guide the safety assessment of lithium-ion batteries.

Key words: lithium-ion batteries, lithium plating, lithium stripping, external characteristic methods

CLC Number: