Cycle life estimation of lithium secondary battery by extrapolation method and accelerated aging test

• Published in: Journal of power sources Vol. 97; pp. 697 - 701
• Main Authors: Takei, K., Kumai, K., Kobayashi, Y., Miyashiro, H., Terada, N., Iwahori, T., Tanaka, T.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01-07-2001; Elsevier Sequoia
• Subjects: Accelerated aging test; Applied sciences; Cycle life; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Extrapolation method; Lithium ion batteries; Lithium ion batteries; Accelerated aging test; Extrapolation method; Cycle life; Cobalt oxide; Ternary compound; Alkali metal Compounds; Transition metal Compounds; Secondary cell; Electrode material; Electric batteries; Discharge charge cycle; Intercalation compound; Metal metal oxide batteries; Life cycle; Organic electrolyte storage battery; Artificial ageing; Lithium oxide; Specific capacity; Electrical characteristic
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/S0378-7753(01)00646-2

The testing methods to estimate the life cycles of lithium ion batteries for a short period, have been developed using a commercialized cell with LiCoO
2/hard carbon cell system. The degradation reactions with increasing cycles were suggested to occur predominantly above 4
V from the results of operating voltage range divided tests. In the case of the extrapolation method using limited cycle data, the straight line approximation was useful as the cycle performance has the linearity, but the error is at most 40% in using the initial short cycle data. In the case of the accelerated aging tests using the following stress factors, the charge and/or discharge rate, large accelerated coefficients were obtained in the high charge rate and the high temperature thermal stress.