Events

Abstract

Lithium-ion batteries (LIBs) are the chosen power source for battery electric vehicles and battery energy storage systems. These high-power, high-capacity applications subject LIBs to challenging operating environments where mechanical, electrical, and thermal abuse is likely. These factors have incentivized the search for improvements to the battery management system, including the introduction of new sensing modalities. Ultrasonic inspection techniques have recently been shown capable of detecting changes of in State of Charge (SOC) and State of Health (SOH) and are therefore of interest for both condition monitoring and damage detection. This talk will present recent efforts to employ multi-modal ultrasonic measurements to detect changes in SOC, SOH, and early detection of thermal runaway when LIBs are subjected to external loading. We will provide an overview of ultrasonic motion in layered media as it applies to LIBs and associated modeling and measurement techniques in order to create a measurement system to monitor battery health using simple metrics such as ultrasonic time-of-flight and signal amplitude. We show that ultrasonic techniques provide unique opportunities to monitor changes to the stiffness, density, and attenuation in pouch cells which result from changes in the mechanical properties and evolution of internal damage within the cell due to thermal loading and electrical cycling and provide an outlook for the use ultrasonic methods in LIB technologies.

About the Speaker

Dr. Haberman is an Associate Professor in the Walker Department of Mechanical Engineering at the University of Texas (UT) at Austin with a joint appointment at the Applied Research Laboratories UT Austin. He received his Ph.D. and Master of Science degrees in Mechanical Engineering from the Georgia Institute of Technology in 2007 and 2001, respectively, and received a Diplôme de Doctorat in Engineering Mechanics from the Université de Lorraine in Metz, France in 2006. His undergraduate work in Mechanical Engineering was done at the University of Idaho, where he received a B.S. in 2000. Dr. Haberman's research interests are centered on elastic and acoustic wave propagation in complex media, acoustic metamaterials, new acoustic transduction materials, ultrasonic nondestructive testing, and vibro-acoustic transducers. He has worked extensively on the modeling and characterization of acoustic metamaterials, composite materials, and the multi-objective design of acoustical materials. His current research focuses on modeling, design, and testing of composite materials, metamaterials, and structures. His research finds application in technical areas that include the absorption and isolation of acoustical, vibrational, and impulsive energy using negative stiffness and Willis coupling, devices that make use of non-reciprocal acoustic and elastic wave phenomena, and condition monitoring of lithium-ion batteries using ultrasonic methods.