Evaluation of a Commercial Demonstration Bus Line Utilizing Wireless Charging Technology

Paper #:
  • 2017-01-0651

Published:
  • 2017-03-28
DOI:
  • 10.4271/2017-01-0651
Citation:
Hu, Y., Feng, S., Yao, C., Shao, W. et al., "Evaluation of a Commercial Demonstration Bus Line Utilizing Wireless Charging Technology," SAE Int. J. Commer. Veh. 10(1):373-385, 2017, https://doi.org/10.4271/2017-01-0651.
Pages:
13
Abstract:
This paper conducts an investigation on the operating cycle of Bus No. 306, which is equipped with wireless charging system, in Changsha, Hunan Province, China. The wireless charging system and electric buses are manufactured by ZTE Corporation (Zhongxing Telecommunication Equipment Corporation) and BYD Company Limited, respectively. In this paper, the operating cycle is quantified and modeled based on experimental data. The real-time bus route and SOC (state of charge) during daytime operation are recorded with the help of GPS (global position system) and BMS (battery management system). The wireless charging process is tested with a power analyzer and its charging efficiency is compared with a plug-in system. Besides, the radiation level while charging is also taken into consideration. Currently, the buses are designed to operate in daytime and get charged at night. In order to explore the battery downsizing potential, plug-in buses, wireless charging buses with fixed and free departure schedule are simulated and compared. As a result, extra charging opportunities are introduced to daily operation so that the rated battery capacity can be reduced by more than 70%.
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