Journal
ELECTROCHIMICA ACTA
Volume 295, Issue -, Pages 1057-1066Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.11.134
Keywords
Equivalent circuit model; Parameter identification; Optimization algorithm; Metaheuristic algorithm; Li-ion battery
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Funding
- National Natural Science Foundation of China (NSFC) [51505290, 5187138]
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A suitable model structure and matched model parameters are prerequisites for the precise estimation of the battery states. Previous studies pay little attention to whether a parameter identification method is suitable for a model. In this study, a comparative study is conducted by implementing model parameter optimization for nine equivalent circuit models using nine optimizers in the entire SOC area. The following conclusions are drawn: (1) PNGV and the exact algorithms are an ideal combination in the low SOC area (0%-20%). (2) In the high SOC area (20-100%), exact algorithms are an ideal choice for the first-order RC models, and PSO is an ideal identification algorithm for second-order RC models. For the third-and fourth-order RC models, firefly algorithm has the highest accuracy with longer identification time. (3) Firefly algorithm has the superior capacity to identify the accurate model parameters and PSO has the best comprehensive performance for on-line parameter identification. (C) 2018 Elsevier Ltd. All rights reserved.
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