Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (6): 1961-1968.doi: 10.19799/j.cnki.2095-4239.2020.0154

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

Multi-objective thermal optimization of ternary lithium-ion battery

Changming DING(), Hua WEN()   

  1. School of Mechanic & Electronic Engineering, Nanchang University, Nanchang 330031, Jiangxi, China
  • Received:2020-04-22 Revised:2020-05-18 Online:2020-11-05 Published:2020-10-28
  • Contact: Hua WEN E-mail:329016738@qq.com;wenhua@ncu.edu.cn

Abstract:

The heat production of the lithium-ion battery has a very important impact on its safety and life. Based on COMSOL Multiphysics, this study proposes a three-dimensional electrochemical thermal coupled finite element analysis model for a 51 A·h laminated lithium-ion pouch battery. The effects of six design parameters on the temperature field (i.e., positive electrode thickness, plate width, positive electrode tab thickness, positive electrode tab width, negative electrode tab thickness, and negative electrode tab width) are studied using the response surface method. The linear weighted sum and random gradient descent methods are used to obtain the optimal scheme to reduce the average temperature rise and the maximum temperature difference of the battery. The average temperature rise and the maximum temperature difference of the battery can be reduced by using the random gradient descent method. The results show that the positive electrode thickness greatly influences the temperature field positively related to the temperature rise; however, the influence is weakened when the thickness is reduced to a certain extent. The increase of the plate width and the tab size can reduce the temperature rise of the battery at the end of the discharge. In addition, the maximum temperature difference of the battery reaches the minimum value within a certain range. The error of the scheme is less than 2.68%. The temperature rise is reduced by 2.93 ℃. The temperature difference is reduced by 0.596 ℃, which is helpful in improving the safety and life of the battery, and provides a reference for the multi-objective thermal optimization of other batteries.

Key words: lithium-ion battery, electrochemical-thermal coupling model, response surface methodology, thermal analysis, multi-objective optimization

CLC Number: