Non-destructive Evaluation Method for Thermal Parameters of Prismatic Li-ion Cell Using Infrared Thermography

ABSTRACT This work proposed a non-destructive evaluation method using IR camera for prismatic Li-ion cell to evaluate the thermal conductivity and the thermal contact resistance (TCR) for both in-plane and cross-plane directions. In this study, experiments were conducted using two 50-Ah cells and two 75-Ah cells. The cross-plane parameters exhibit significant repeatability, as evidenced in three independent tests. However, the in-plane parameters could only be inferred within the best possible range of values. The cross-plane TCRs are negligible, whereas the in-plane TCRs are greater than 0.012 KW−1m2 and 0.016 KW−1m2 for the two individual cells.