Journal
JOURNAL OF POWER SOURCES
Volume 119, Issue -, Pages 902-905Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0378-7753(03)00208-8
Keywords
lithium-ion batteries; calendar life; backup use; accelerated test; impedance; capacity fade
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The backup characteristics of lithium-ion batteries were investigated using commercial prismatic lithium-ion cells with a LiCoO2/graphite cell system. An accelerated method of estimating the lifetime of lithium-ion batteries was developed. It was found that higher temperatures and voltages accelerate the degradation of the cells: a 15 degreesC increase in temperature cuts the cell life in half, and about 0.1 V increase in charging voltage also cut the cell life in half. (C) 2003 Elsevier Science B.V. All rights reserved.
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