2021 IWIS – Third Best Paper Award
The Circle of Experts in Impedance Spectroscopy (CEIS) has awarded Pietro Iurilli and his coauthors with a Best Paper Award for their work entitled “DRT-based modelling framework for Li-ion cells.”
This work presents a novel DRT-based modelling framework for Li-ion cells. A physically-based Electric Circuit Model (ECM) is developed starting from Electrochemical Impedance Spectroscopy (EIS) and Open Circuit Voltage (OCV) measurements. Distribution of Relaxation Times (DRT) is applied to deconvolve the electrochemical phenomena from the EIS, to configure the ECM, and to extract the model parameters. The proposed framework is applied to large format Li-ion pouch cells. Different current profiles have been tested to validate the model, showing its high accuracy in reproducing the battery cell behavior.