An Extended PNGV Battery Model for Electric and Hybrid Vehicles

Battery performances at different operating conditions, temperature, loading ... etc, have a great influence on the performance of the electrical vehicles (EVs) and hybrid electric vehicles (HEVs). Therefore, an accurate and efficient battery model is needful to predict and optimize the battery performance. This paper presents a battery model with a series of innovative aspects into the partnership for a new generation of vehicles (PNGV), which also known as FreedomCAR battery model. The proposed battery model, extended PNGV (EPNGV), proposes some modification in the parameters estimation and modeling techniques as well the PNGV battery model itself In addition, the EPNGV model includes the influence of the state of charge, temperature, current rates (c-rates) and cycle number on the model parameters, as well the Peukert constant, self-discharging, energy efficiency and state of health prediction. Experimental results of lithium-polymer 12Ah 3.7V batteries are used for the battery models parameters estimation and validation. The EPNGV battery model has been compared with other battery models: the Thevenin and the traditional PNGV battery models at different operating conditions based on experimental and simulation results. The battery parameters estimation as well the battery modeling are implemented using MATLAB/Simulink. Copyright (C) 2011 Praise Worthy Prize S.r.l. - All rights reserved.