Electrochemical and Thermal Modelling of a Li-Ion NMC Pouch Cell

Lithium-ion battery cells are considered the best solution for energy storage systems in Battery Electric Vehicles (BEVs), due to their high energy density, high lifecycle, and low aging impact. Battery performances are strictly connected to operating conditions, especially temperature. Modern Battery Thermal Management Systems (BTMSs) optimize battery usage in terms of temperature to achieve high performance and high safety of the battery. In this paper an electrochemical-thermal coupled 3D model will be developed and discussed. The electrochemical model used is a pseudo-bidimensional model (P2D) which will output the heat source for the thermal model in order to get from this one the temperature of the battery when charging and discharging. The model data will be validated through experimental data coming from a 30 Ah NMC pouch cell used in automotive applications.