Idling working condition control method of hydrogen fuel cell hybrid power system

Abstract

The invention provides an idling working condition control method of a hydrogen fuel cell hybrid power system. The method comprises the following steps: when a fuel cell system has no power output ora vehicle is stopped and braked, judging whether the fuel cell system enters an idling working state from a normal operation mode or not according to the voltage of the fuel cell system or the voltageof the super capacitor system or the SOC of the nickel-metal hydride battery system, if yes, enabling the fuel cell system to work at the lowest power, closing the air system, and utilizing a DC / DC converter to carry out low-current load pulling; judging whether the monomer voltage of the fuel cell system is less than or equal to 200 mV or not, and if so, closing the hydrogen system to enable thefuel cell system to enter idle stop waiting; and judging whether to restart the fuel cell system according to the required power of the fuel cell system or the voltage of the super capacitor system or the SOC of the nickel-metal hydride battery system, and if so, restarting the fuel cell system to enter a normal operation mode.

Description

technical field [0001] The invention relates to the technical field of hydrogen fuel cells, in particular to a method for controlling idle speed conditions of a hydrogen fuel cell hybrid power system. Background technique [0002] Energy issues and environmental protection have become the core of the sustainable development strategy of human society, affecting the energy decision-making and technology orientation of countries all over the world. Fuel cells have high energy conversion efficiency, no noise, and no pollution. They are becoming an ideal energy utilization method. Their high efficiency, cleanness, and renewable characteristics make them have broad application prospects in the fields of transportation, transportation, and communications in the future. A fuel cell is a device that directly converts the chemical energy generated by the fuel reaction into electrical energy. Proton exchange membrane fuel cell (PEMFC) is a research and development hotspot in the field...

AI Technical Summary

Problems solved by technology

[0003] During the service life of the fuel cell hybrid electric vehicle, when the fuel cell hybrid electric vehicle is running at idle speed, the voltage working range of the fuel cell cell is between 0.85-0.9V, and the higher potential will also make the fuel cell The battery material and performance are attenuated, which affects the life of the battery

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