期刊
JOURNAL OF POWER SOURCES
卷 97-8, 期 -, 页码 697-701出版社
ELSEVIER
DOI: 10.1016/S0378-7753(01)00646-2
关键词
lithium ion batteries; cycle life; extrapolation method; accelerated aging test
The testing methods to estimate the Life cycles of lithium ion batteries for a short period, have been developed using a commercialized cell with LiCoO2/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. (C) 2001 Elsevier Science B.V. All rights reserved.
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