Analysis of Specific Heat of Lithium-ion Power Battery

Today,Lithium-ion power batteries have been developing fast.More and more attention has been paid to the safety performance of such batteries.Among many the heat has been recognized one of the dominant factors affecting the safety performance.In order to research the heat generation problems in the use of battery,we simulated and calculated the specific heat capacity of LiNi1/3Co1/3Mn1/3O2 battery and LiFePO4 battery with different types,according to the temperature rise data of rated discharge of lithium-ion power battery.The results show that both battery materials and battery structure have effects on the equivalent specific heat capacity and temperature of the battery.The temperature rise rate of LiNi1/3Co1/3Mn1/3O2 battery is relatively fast with respect to LiFePO4lithium-ion battery.The heat release system of a battery with larger volume and longer pole piece is poor.The information provided basic ideas for production and material selection of battery,and also data support for safety performance of lithium-ion battery.Besides,it also has a profound influence on the development of lithium ion battery.