期刊
ENERGY REPORTS
卷 6, 期 -, 页码 672-683出版社
ELSEVIER
DOI: 10.1016/j.egyr.2020.03.013
关键词
Retired lithium-ion battery; Rapid classification; Capacity estimation; Battery pack; RBFNN
资金
- National Natural Science Foundation of China (NSFC) [51877138]
- Shanghai Science and Technology Development Fund, PR China [19QA1406200]
- Science and Technology Foundation of State Grid Corporation of China (SGCC) [DG71-19-024]
With the aging of Lithium-ion batteries (LIBs) of electric vehicles in the near future, research on the second use of retired LIBs is becoming more and more critical. The classification method of the retired LIBs is challenging before the second use due to large cell variations. This paper proposes a rapid classification method based on battery capacity and internal resistance, because batteries with different capacities and internal resistances have different voltage curves during charge/discharge. First, the piecewise linear fitting method established by the specified tested batteries with capacities and their corresponding characteristic voltages is used to sort the batteries. Then combined with the nonlinear function approximation ability of the radial basis function neural network (RBFNN) model, battery capacity and internal resistance are predicted after the model training. 108 cells are used for the simulation classification with experimental classification performed on 12 cells. The results prove that the classification method is accurate. (C) 2020 The Authors. Published by Elsevier Ltd.
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