–30 ℃ COLD START STRATEGY OF DESIGNED FUEL CELL SYSTEM

Proton exchange membrane fuel cells (PEMFCs) are considered one of the most promising alternative power sources for future vehicles due to their high energy conversion efficiency, zero pollution, and wide availability of fuel sources. Enhancing the low-temperature start-up capability of fuel cell systems is crucial for their widespread commercial application in the future. However, current experimental research findings are primarily based on single fuel cells or low-power stacks, with very limited studies on the impact of cold start on high-power systems. This leads to a significant gap between current scientific research and practical application, and the relevant results cannot be directly applied to actual systems. Therefore, research on low-temperature cold start of high-power fuel cells is of great significance. In this study, a 130kW fuel cell system was designed, and AVL Cruise M software was used to model and simulate the low-temperature cold start process of the fuel cell. By studying the start-up current loading strategies and the effects of operating parameters on fuel cell performance changes under –30 ℃ experimental conditions, key information reflecting the state changes within the fuel cell stack was obtained. Based on this, a low-temperature cold start loading strategy corresponding to the specific temperature was proposed.