The lithium-ion battery has a high energy density, high conversion efficiency, long cycle life, no memory effect, no charge, no discharge time delay, low self-discharge rate, wide temperature range and environment-friendly advantages, thus it becomes an ideal carrier of electric power and has been widely used in various fieldsIn general, we in the use of the lithium-ion battery, it will focus on some technical indicators, as the main factor to measure its performance "and".