Study on Cycle-Life Prediction Model of Lithium-Ion Battery for Electric Vehicles

This paper proposes a novel method for rapid determination of battery cycle life. Based on the relationship between the battery capacity, Arrhenius formula, temperature accelerated stress and charge-discharge current accelerated stress, a fitting formula is obtained to predict the battery capacity fading rate and battery charge-discharge cycle numbers. It is shown in the lithium-ion cell tests that the proposed formula can accurately reflect the tendency of battery capacity fading, and the estimation error is less than 5%.