1. Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle , Hubei University of Arts and Science , Xiangyang , , China
2. School of Automobileand Traffic Engineering , Hubei University of Arts and Sciences , Xiangyang , China
3. Institute of Transportation Development Strategy & Planning of Sichuan Province , Chengdu , China
4. School of Mechanical Engineering , Hubei University of Arts and Science , Xiangyang , China