Experimental analysis of - 30 ℃ cold start process for an automotive PEM fuel cell system
2022-01-0829
03/29/2022
- Event
- Content
- Proton exchange membrane fuel cell (PEMFC) system is considered as one of the most popular power sources because of its high energy density, fast dynamic response and zero pollution. However, the start-up at low temperature (e.g. - 30 ℃) is still a major challenge for its wide application due to water freezing in low temperature. In this paper, a cold start experiment in - 30 ℃ environment cabin with auxiliary heat was carried out for a full power automotive PEMFC system. Based on system thermal management, the heat balance model of this system was obtained by relevant theoretical calculation. The heat required for whole system at low temperature was predicted and analyzed, and the calculated heat of the model was compared with the actual heat value of low temperature test to verify the accuracy of the calculation model. What’s more. cold start was realized successfully by formulating corresponding control strategy. Relevant output characteristics during the cold start process were analyzed, such as stack performance output, system component feature, single cell voltage uniformity and degradation before and after cold temperature. The low temperature not only affected the success of the cold start for fuel cell system, but also played a key role on the stack output performance and lifetime. Taking effective measures to rise the stack temperature rapidly is important to cold start successfully and promote its durability. This work verified the effectiveness of the system design and control strategy and hoped to provide reference for the optimization of extreme low-temperature start control strategy.
- Citation
- Liu, P., and Xu, S., "Experimental analysis of - 30 ℃ cold start process for an automotive PEM fuel cell system," SAE Technical Paper 2022-01-0829, 2022, .