Research on air mass flow-pressure combined control and dynamic performance of fuel cell system for vehicles application

Ze Liu, Baitao Zhang and Sichuan Xu

Applied Energy, 2022, vol. 309, issue C, No S0306261921016718

Abstract: High-power polymer electrolyte membrane fuel cell (PEMFC) system has become an effective solution to promote the large-scale commercialization of fuel cell vehicles. Precise pressure control is required while managing the mass flow. The air flow-pressure supply that meets the power requirements of the system can not only improve the performance output of the PEMFC system but also effectively prevent the life degradation caused by starvation and pressure fluctuation. In this paper, an easy-to-implement air mass flow-pressure combined control strategy is designed and successfully applied to an 80 kW-grade fuel cell system for vehicles. The control effect of the proposed controller is validated and the dynamic response and steady-state performance of the system are investigated in a series of load change experiments. Results show that the air mass flow and pressure control effect adequately satisfies the operating requirements of the fuel cell system based on the power requirements and has the dynamic response and steady-state holding capability to meet the system actual operation under different operating conditions. Satisfactory system dynamic and steady-state performance output are obtained under good air supply conditions. The temporary voltage undershoots and overshoots occur during the dynamic load change, but these values are small and reach the target stable value in about 20 s. Consistency analysis points out the coefficient of variation of the cell voltage (Cv) shows superior consistency and uniformity of the system under dynamic load changes. The Cv is controlled below 1%, which allows the PEMFC system to have long-term durability and reliability in real applications.

Keywords: High-power PEMFC system for vehicles; Power requirements; Air mass flow-pressure combined control; Dynamic performance; Consistency (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (8)

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DOI: 10.1016/j.apenergy.2021.118446

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