Abstract

The battery Remaining Useful Life (RUL) is at the crux of the payback calculations and is often confused with the Battery State of health (SOH), which is quantified by capacity (cyclable energy) and cell resistance (power capability) that will be stored and reported in battery passports. In this talk, I will show the physics-based models and the identification of the physical origin of the battery degradation, such as a rust-like (SEI) film growth in electrode particles, lithium plating, mechanical particle fracture, and metal dissolution. Throughout this deep dive into the battery state of X estimation, I will point to the critical tasks where power electronics will be the enabler for estimating, managing, and protecting aged battery assets for stretching and repurposing their lives.

Prof. Anna Stefanopoulou, the William Clay Ford Professor of Technology and Professor of Mechanical Engineering and Electrical Computer Engineering at the University of Michigan is a Fellow of the ASME (08), IEEE (09), and SAE (18) and has been recognized in her field with multiple awards. She was an elected member of the Executive Committee of the ASME Dynamics Systems and Control Division and the Board of Governors of the IEEE Control Systems Society, the Founding Chair of the ASME DSCD Energy Systems Technical Committee She was the Director of the UM Energy Institute (2018-2020) and the Director of the Automotive Research Center, a multi-university U.S. Army Center of Excellence in Modeling and Simulation of Ground Vehicles (2009-2018). Before Michigan, she was an assistant professor at the University of California, Santa Barbara, a visiting professor at ETH, Zurich, and a technical specialist at Ford.