2017年10月24日，星期二，10:00AM
绣山工程大楼208室

Mechanical Integrity Behavior of Lithium-ion Batteries in Electric Vehicles
Jun Xu
Department of Automotive Engineering and Director of Advanced Vehicle Research Center (AVRC), Beihang University

ABSTRACT
Lithium-ion battery safety is one of the critical bottlenecks for the further application of electric vehicles. Possible crashes, stochastic vibrations, potential foreign object penetrations may cause short-circuit of batteries thus leading to irreversible catastrophic consequences, e.g. fire, explosion. In this talk, I’ll start from the structural and material characterization and analysis. Detailed material behaviors of lithium-ion battery component are unraveled. A computational model with battery short-circuit criteria is established for evaluation of battery behavior at extreme loading conditions. Further, a mechanical-electrochemical-thermal coupled model is developed and validated by controlled experiments. Results may provide fundamental mechanism analysis and efficient computational models for better understanding of mechanical integrity behavior of lithium-ion batteries.
BRIEF INTRODUCTION
Dr. Jun Xu graduated from Tsinghua University as a Ph.D. in 2011 majoring in Automotive Engineering and obtained his second Ph.D. degree from Columbia University in 2014 majoring in Engineering Mechanics. Dr. Xu then joined Beihang University in 2014 and served as Professor in the Department of Automotive Engineering and Director of Advanced Vehicle Research Center (AVRC). Dr. Xu was the awardee of “Global Youth Expert Recruitment Plan”, China, “Young Elite Support Scholarship”, National Society of Science and Technology, “Outstanding Young Investigator in Impact Dynamics”, Chinese Society of Mechanics, ASME Travel Grant and APEC Science Prize Nomination. He has authored/co-authored more than 70 peer-reviewed journal papers and conference papers with total citations over 690 times with H-index 14. Now, he is the member of ASME Fracture and Failure Mechanics Committee. Dr Xu’s research focuses including mechanical integrity of materials/structures under dynamic loading, lightweight material design and stress wave propagation behavior.