Development and implementation of control-oriented electrochemical battery models in a battery management system

This paper proposes an approach to develop reduced-order electrochemical battery models for controls. The reduced-order models are derived from detailed electrochemical battery models, which combine ionic and electronic processes in the level of active material particles, through a significant model reduction with the order of hundreds or more. The reduction is possible through the understanding of electrochemical process in battery cells. The developed models can capture most of key electrochemical dynamics in a cell with a few state variables. The model is validated using real-world vehicle test data, which consist of both charge depleting (CD) and charge sustaining (CS) driving modes. The models were implemented and tested in a battery management system (BMS).