Space-resolved reduced order modeling of prismatic battery thermal dynamics

Model-based thermal management enables sophisticated battery temperature control due to the availability of temperature information among and inside cells. This paper proposes a reduced-order battery thermal modeling approach by combining the pre-calculated temperature distribution in steady state and the approximated transient responses from multi-dimensional full-order thermal models. The number of states is reduced by an order of hundreds, and the developed model can predict battery thermal dynamics with errors within 0.2 °C compared to the full order model simulation results under a real-world driving cycle.