Chaochao Chen a and Michael Pecht a
aCenter for Advanced Life Cycle Engineering (CALCE), University of Maryland, College Park, MD 20742, USA
This paper presents an integrated approach to predict remaining useful life (RUL) of lithium-ion batteries using modelbased and data-driven methods. An empirical model is adopted to emulate the battery degradation trend; real-time measurements are employed to update the model. In order to better deal with prognostics uncertainties arising from many sources in the prediction such as battery unit-to-unit variations, an online model update scheme is proposed in a particle filtering based framework. Filtered data within a moving window are used to adjust the model's parameter values in a real-time manner based on nonlinear least-squares optimization. The proposed approach is studied via experimental data, and the results are discussed.
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