Speaker Romain Postoyan
CNRS Researcher,
Centre de Recherche en Automatique de Nancy Universite de Lorraine, Nancy, France
Date｜Time Jan 23 (Friday), 2026｜17:00-18:30
Place https://snu-ac-kr.zoom.us/my/jingyu.lee
Abstract
Monitoring the minimum and maximum states of charge (SOC) in lithium-ion battery packs is key to ensuring safe and reliable long-term operation. The challenge is that these SOCs cannot be directly measured and their corresponding cells within the pack may change with time. We will see in this talk a a hybrid scheme that estimates the minimum and maximum SOCs within a battery pack given by the series interconnection of equivalent circuit models. The dimension of the hybrid estimator is independent of the number of cells, which makes it particularly attractive for large battery packs. Moreover, the estimator is endowed with global ISS properties. The stability analysis involves cascade system arguments and the use of a non-smooth Lyapunov function. We will finally illustrate the efficiency of the estimator on numerical simulations and compare it with state-of-the-art techniques, which will demonstrate its benefits either in terms of computation time or estimates accuracy.
Biography
Romain Postoyan received the “Ingénieur” degree in Electrical and Control Engineering from ENSEEIHT (France) in 2005. He obtained the M.Sc. by Research in Control Theory & Application from Coventry University (United Kingdom) in 2006 and the Ph.D. in Control Engineering from Université Paris-Sud (France) in 2009. In 2010, he was a research assistant at the University of Melbourne (Australia). Since 2011, he is a CNRS researcher at the “Centre de Recherche en Automatique de Nancy”(France). He received the “Habilitation à Diriger des Recherches (HDR)” in 2019 from Université de Lorraine (Nancy, France). He serves/served as a senior editor for NAHS and an associate editor for the journals: IEEE Transactions on Automatic Control, Automatica, IEEE Control Systems Letters and IMA Journal of Mathematical Control and Information. His research interests include hybrid systems, dynamic programming, and nonlinear estimation.
