Lithium ion batteries are prone to capacity degradation during long-term operation,with varying degrees of degradation and different underlying mechanisms under different operating condi-tions.Through the study of cycle failure of lithium ion batteries under different conditions,the mechanisms are investigated in order to provide insights for optimizing battery design to enhance the safety and durability of lithium ion battery use.This article summarizes the situation of cycle capac-ity degradation and failure mechanisms under different temperatures,pressures,charge-discharge rates,overcharging and overdischarging,as well as State of Charge(SOC)cycling ranges.Relevant strategies are proposed to improve the performance of lithium ion batteries and ensure their safe and stable operation.
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