The pouch Li-ion battery show suffer expansion,internal gas production,water vapor penetration and other problems caused by temperature,humidity and other environmental conditions in use.This will result in seal failure,the sealing life is reduced,then the service life will be affected.The accelerated aging tests with high temperature,high temperature and high humidity conditions are conducted,the water vapor permeability and bonding strength in the hot sealing area of battery are studied.Based on the Arrhenius model and Hallberg-Peck model,the sealing life of battery under conventional stress through the water vapor penetration test is obtained,which is 6.31 a.The sealing life of battery under 25℃through the high temperature test is 29.69 a.The sealing life of battery under conventional stress through the high temperature and high humidity test is 33.18 a.Within a certain range of accelerating stress,this method can quickly predict the sealing life of battery and shorten the test time.
国家科技期刊平台
NSTL
万方数据
