#br# Thermal simulation for lithium-sulfur battery during discharge process

doi:10.12028/j.issn.2095-4239.2016.0110

Abstract

Abstract: Currently batteries have heat-related security issues. Similar problems also exist in lithium-sulfur batteries. Thermal simulation method can be used to predict the temperature distribution of battery under various operating conditions, which will help optimize the performance and structure design of the battery. In this article, thermal simulation of lithium-sulfur battery was undertaken to explore the temperature of the battery during cycling. In order to study the heat generation rate in the use of battery, the open circuit voltage and operating voltage were firstly tested and used. A finite element software COMSOL Multiphysics was employed to simulate transient battery temperature at different ambient temperatures and different discharge rates. It was indicated by the simulation that the battery temperature first decreased and then increased in the discharge process. Furthermore, we proposed that reversible entropy change played a major role in the change of battery temperature.

Key words: lithium-sulfur battery, temperature field, thermal simulation

WANG Yuhui1,2, JIN Jun1, GUO Zhansheng2, WEN Zhaoyin1. #br# Thermal simulation for lithium-sulfur battery during discharge process[J]. Energy Storage Science and Technology, 2017, 6(1): 85-93.

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