This paper explores the experimental stress intervals for commercial LFP/C batteries to ensure mechanistic consistency based on a 43-month calendar aging test and a 10-month cyclic aging test, taking the log-normal distribution as a time-to-failure statistical lifetime model. A comprehensive study is performed based on capacity measurements during calendar aging considering two stress factors (the temperature and the state-of-charge (SOC) level) and cycling aging considering three stress factors (the temperature, the SOC level, and the cycle-depth (CD) level).Based on the constant acceleration factor principle, test conditions causing different failure lifetime behaviors can be pointed out. The ranking of different stress effects in the test range can be obtained. Hopefully, this method can be used as a reference to make reasonable test plans for detecting battery’s performance, thereby, predicting their lifetime more accurately.
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