期刊
JOURNAL OF POWER SOURCES
卷 275, 期 -, 页码 573-587出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.10.153
关键词
Li-ion battery ageing; LiFePO4 (LFP)/graphite; Cycle-life performance model; Dynamic cycling profiles; Lithium inventory loss (LLI); Loss of active material (LAM)
资金
- ETORTEK [IE12-335]
- EMAITEK Strategic Programs of the Basque Government
The present investigation work compares cycling ageing behaviour upon constant operation conditions (static tests) with degradation under non-constant schemes (dynamic tests), through a novel methodology for ageing model dynamic validation. A LIP-based Li-ion cell performance loss is analysed using a DOD and C-rate stress factors Ah-throughput-domain characterisation method, and represented using a semi-empirical model. The proposed stepwise validation approach enables assessing the static ageing tests acceleration factor and systematically improving the ageing model. The result is a simple but comprehensive model. The predictions root-mean-square error, under dynamic cycling operation conditions, is just 1.75%. (C) 2014 Elsevier B.V. All rights reserved.
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