Fully Coupled Thermal-Electrochemical-Structural-Pore Pressure Analysis of Lithium ion battery with detailed 3D geometry

Abstract

Doyle-Fuller-Newman (DFN) model has been used as P2D (pseudo 2-dimensional) to predict basic electrochemical behavior of a lithium-ion battery (LiB). However, some effects such as structural deformation induced by swelling cannot be observed in P2D, and implementation of P4D (pseudo 4-dimensional) was tried in some of the studies. In this paper, some advanced studies on LiB electrochemistry are presented using the P4D module implemented in a commercial FEM code Abaqus/Standard. Battery casing deformation and its related effects such as porosity change are observed in TECM (Thermal-Electrochemical-Mechanical) simulation results. TECMP (TECM-Pore fluid flow) simulation results show axially non-uniform ion concentration distribution, which does not resolve at all after one hour of a break process.