Abstract To study the insufficient effect of accelerated life test of ternary lithium battery, an accelerated life model based on Arrhenius model with ambient temperature as a single acceleration factor is established. The accelerated life model is based on the empirical model of battery life decline under the coupling of ambient temperature-discharge rate. The expermental results show that the acceleration effect is limited when the ambient temperature is a single factor. Compared with temperature and discharge rate at 25℃ and 1C, the average number of cycles is shortened by 290 times at 50℃ and 1C, 510 times at 50℃ and 3C, and 710 times at 50℃ and 5C. The coupling of temperature and discharge rate can effectively shorten the times of charge and discharge compared with a single ambient temperature. The coupled accelerated life model is used to infer the battery life characteristics under low or normal level conditions through high-level factors.
DING Peng-fei,SUN Jian,XU Hong-wei. Study on Temperature-discharge Rate Coupling Accelerated Life Model of Ternary Lithium Battery[J]. Acta Metrologica Sinica, 2022, 43(2): 250-255.
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2022, Vol. 43 
