Woodruff School of Mechanical Engineering
Faculty Candidate Seminar
Sustainability of Lithium Ion Battery for Electric Vehicles
Dr. Chris Yuan
University of Wisconsin - Milwaukee
Monday, February 22, 2016 at 11:00:00 AM
MRDC Building, Room 4211
Dr. Christopher Saldana
Electric vehicles (EVs) are widely recognized as clean alternative to conventional vehicles for reducing greenhouse gas emissions from ground transportation. However, the lithium ion batteries (LIBs) used in current EV are gravely concerned on such sustainability issues as short battery life and uncertain environmental impacts, which are rooted in the battery material chemistry, manufacturing processes and operating conditions. In this seminar, comprehensive electrochemistry modeling of lithium ion battery performance will be presented, integrating the lithium ion mass diffusion, charge transport and heat transfer, as studied on the typical lithium manganese oxides (LMO)-Graphite lithium ion battery which are widely used in such EVs as Nissan Leaf and Chevrolet Volt. The battery charging/discharging behaviors, internal resistance and stress/strain evolution under actual battery operating conditions are mathematically modeled and experimentally validated to understand the battery degradation during the battery charging/discharging cycling operations. Finally, the battery life under actual EV operating conditions in each state of U.S. are numerically predicted and the battery-governed greenhouse gas emissions from the EV operations are accurately determined. These results can be useful in sustainable manufacturing and adoption of lithium ion battery for EVs, and also can be transformed to study next generation high capacity battery technologies for EVs in future.
Chris Yuan is currently an Associate Professor in Department of Mechanical Engineering at the University of Wisconsin-Milwaukee where he serves the Director of the Laboratory for Sustainable and Nano-Manufacturing and also the Director of the DOE Industrial Assessment Center. His research interests are in sustainable manufacturing and clean energy manufacturing including lithium ion battery and solar cells. He is a recipient of the National Science Foundation Career Award in 2014, State of Wisconsin Citation of Commendation Award in 2014, The Gustav Olling Outstanding Young Manufacturing Engineer Award from the Society of Manufacturing Engineers (SME) in 2013, and the LEO Best Paper Award from the 2013 CIRP International Conference on Life Cycle Engineering. He obtained his Ph.D. in Mechanical Engineering from the University of California, Berkeley in 2009, his M.S., in Industrial Engineering from Texas Tech University in 2005, and his B.S. in Mechanical Engineering from China University of Petroleum in 1999.
Refreshments will be served.