Investigation of Multidimensional Electrothermal Impedance Spectroscopy Measurement on Lithium Ion Battery Cell

International audienceBecause of the safety concerns and strive for optimal battery thermal management, the importance of thermal modelling of lithium ion batteries is growing. Thermal modelling is becoming even more important with ongoing improvements of power capabilities of modern lithium ion batteries and the decrease in their physical dimensions. Recently an electrothermal impedance spectroscopy (ETIS) was proposed by Barsoukov (9) as a non-destructive method of determining the thermal properties of batteries. This paper presents the initial test results from the concept of extending from ETIS measurements from 1D into more battery dimensions what should facilitate in the future in battery 2D and 3D thermal modelling without any a prori knowledge about battery internal composition, internal parameters and electrical behavio