An experimentally validated capacity degradation model for Li-ion batteries in PHEVs applications

This paper proposes an experimentally validated capacity degradation model for Li-Ion batteries deployed in plug-in hybrid electric vehicle (PHEV) applications. An aging and characterization campaign aimed to mimic the real battery usage at low state of charge during charge sustaining operation was conducted on six Lithium iron phosphate (LiFePO4) battery cells. We present an analytical model, driven by experimental data, that relates the main aging factors under which the battery cells have been tested to capacity fade. State-of-health (SOH) and prediction of battery end-of-life (EOL) algorithms can be designed with the proposed model.