Abstract: Lithium-ion batteries are used for energy storage in a wide array of applications, and the effects of battery ageing limit their performance and occur throughout their whole life. On the one hand, the influence of the average SOC and SOC changes(∆SOC) on the available capacity decay of lithium-ion batteries is quantified by analyzing the data of the graphite/LiCoO₂ batteries in different state of charge(SOC) ranges, and a cycle aging model is established. On the other hand, by analyzing the test data of different SOC storage states and different storage temperature life of graphite/LiCoO₂ batteries, the influence of storage condition changes on the decay process of lithium battery state of health is revealed, and a calendar aging model is established. The analysis results can be applied to the actual battery cycle use and static storage optimization settings.