Thermal performance of battery module based on multilayer electro-thermal coupling model

Abstract

With the rapid development of the fast charge technology and increasing of energy density, battery thermal management system (BTMS) is more and more important to ensure the safety and good performance of the battery system. A multilayer electro-thermal coupling model is developed to study the thermal performance of battery module. It is found that uniform heat source model can lead to great error of the BTMS design. Temperature difference in the multilayer model is as big as two times of that in uniform heat source model when the convective heat transfer coefficient is 5 W*m-2. Increasing the convective heat transfer coefficient can’t decrease the temperature difference of the battery module but can decrease the maximum temperature.