Fuel cell system degradation analysis of a Chinese plug-in hybrid fuel cell city bus

作者：Li, Jianqiu; Hu, Zunyan; Xu, Liangfei; Ouyang, Minggao^*; Fang, Chuan; Hu, Junming; Cheng, Siliang; Po, Hong; Zhang, Wenbin; Jiang, Hongliang

来源：International Journal of Hydrogen Energy, 2016, 41(34): 15295-15310.

DOI：10.1016/j.ijhydene.2016.06.136

• Fuel cell city bus
• Fuel cell
• Durability
• Voltage uniformity

Fuel cell hybrid electric vehicles are attracting increasing attention and research. However, the durability of fuel cell systems (FCS) is the main bottleneck in commercial application. A plug-in fuel cell city bus was developed by our group, and it completed several months of demonstration operation. A two-stage flowchart was proposed to clarify the FCS degradation analysis. The average cell voltage decline rate is approximately 346 mu V/h at a current density of 120 A, under which the initial voltage is about 0.7 V. The estimated lifetime in the third stage reaches the design target. The final electrochemically active surface areas are approximately 80% of the initial value. A detailed degradation analysis of fuel cell voltage uniformity is presented, and a five-region degradation otherness analysis is proposed for performance uniformity analysis. The difference of equivalent resistance has been verified to be the main factor in degradation otherness of the regions and in system performance degradation.

• 出版日期2016-9-14
• 单位清华大学