Electro-Thermal Battery Model for Automotive Applications

Conference: PCIM Europe digital days 2021 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/03/2021 - 05/07/2021 at Online

Proceedings: PCIM Europe digital days 2021

Pages: 7Language: englishTyp: PDF

Authors:
Ghoulam, Yasser; Mesbahi, Tedjani; Durand, Sylvain; Lallement, Christophe (ICube, CNRS (UMR 7357) - INSA Strasbourg, University of Strasbourg, France)

Abstract:
Battery modeling plays a crucial role in improving the performance of battery powered systems, especially in electric vehicle (EV) applications. In the present paper, a methodology is investigated to predict the electrical and thermal behaviors of a battery cell. This work describes a model identification procedure for identifying an electro-thermal model of lithium-ion batteries used in automotive applications. The dynamic model structure adopted is based on equivalent circuit model whose parameters are scheduled on the state-of-charge, temperature, and current. The model identified in this way is valid inside a large range of temperatures and state-of-charge, so that the resulting model can be used for automotive applications such as on-board estimation of the state-of-charge and state-of-health. The model coefficients are identified using a multiple step algorithm-based optimization procedure. The validity of the procedure is demonstrated experimentally for A123 commercial LFP/graphite battery cells.