Romain TABUSSE : "Acceleration and characterization of aging for the study of electric vehicle batteries in their first life"

Abstract : At present, the study of lithium-ion battery ageing relies mainly on experimental measurements obtained on test benches. Their production requires long and costly tests. It is therefore necessary to accelerate them, but this can affect the fidelity of degradation. To address this issue, a new approach to accelerated aging has been proposed. It is dedicated to the study of electric vehicle batteries, which have a low utilization rate. This characteristic is exploited to accelerate calendar ageing during parking periods. The temperature is raised to 40°C during these phases only, in order to maintain their contribution to ageing without affecting the fidelity of the driving phases. The methodology was validated experimentally on two different automotive use scenarios and two different chemistries (NCA and NMC). Next, the characterization of aging during accelerated test campaigns was studied. A systemic analysis was carried out on the scale of the complete procedure in order to assess its invasiveness. Thanks to the experimental results, it has been possible to reduce the time and complexity of the procedure. This work is part of the study of the second life of electric car batteries, addressing the first life, which is considered to have a decisive impact on battery performance and degradation during the second life.

Jury Composition  :  

Daniela CHRENKO, Maîtresse de conférences, Université de Technologie de Belfort-Montbéliard, PhD Director

Christophe FORGEZ, Professeur des universités, Université de Technologie de Compiègne, Reporter

Jean-Michel VINASSA, Professeur des universités, Bordeaux INP, Reporter

Ali SARI, Professeur des universités, Université Lyon 1, Reviewer

Matthieu DUBARRY, Associate Professor, University of Hawaï at Mānoa, Reviewer

David BOUQUAIN, Professeur des universités, Université de Franche-Comté, Ph Co-Director

Samir JEMEI, Professeur des universités, Université de Franche-Comté, PhD Co-Director

Localization : Université de Technologie de Belfort-Montbéliard Rue Ernest Thierry Mieg Bâtiment E 90000 Belfort - salle E107