1. National Engineering Laboratory of Electric Vehicles, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China
2. School of Material Science and Engineering, Beihang University, Beijing, China
3. School of Engineering, The University of Western Australia, Perth, WA, Australia
4. School of Automotive Engineering, Chongqing University, Chongqing, China
5. Department of Electrical Engineering, Temple University, Philadelphia, PA, USA