Physics-Based CFD Simulation of Lithium-Ion Battery under the FUDS Driving Cycle

Abstract

The physics-based electrochemical model, Newman's pseudo-2D (P2D) porous electrode model, has been widely accepted in the study of lithium-ion batteries. However, the model is built on the electrode scale. There are two challenges to apply such models in the electrochemical-thermal coupled battery simulation. The first one is how to use such electrode-scale model in the large scale simulation (battery dimension scale). The other one is how to make the physics-based model cost-efficient in a CFD simulation. In this paper, the multi-scale multi-dimensional approach (MSMD) is used to address the first technical issue and a linear approximation for source terms is used to address the second issue. As a result, Newman's P2D model can be used to simulate a lithium-ion battery's behavior under a real driving cycle.