A hydrogen-air coordinated control method for a hydrogen fuel cell

Abstract

The invention provides a hydrogen-air coordinated control method of a hydrogen fuel cell, the method is realized by a coordinated control system and a hydrogen fuel cell system, the coordinated control system includes an optimization module, and the hydrogen fuel cell system includes a stack and a DC / DC converter The optimization module determines the target power of the hydrogen fuel cell system according to the current operating conditions of the hybrid electric vehicle, obtains the hydrogen given signal and the air given signal according to the target power, and automatically adjusts the hydrogen by using the respective closed-loop feedback control of the hydrogen circuit and the air circuit The pressure and flow of air and air; an optimization strategy is proposed, when the power deviation value is greater than the first deviation threshold, the hydrogen given signal and the air given signal are corrected to realize the coordinated control of hydrogen and oxygen, and ensure that the hydrogen fuel cell proceeds according to the electric stack. Pneumatic power curve operation. It can automatically and quickly adjust the flow and pressure of hydrogen and air to ensure that the output power of the hydrogen fuel cell system is stable and quickly reaches the target power output.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a hydrogen-air coordinated control method of a hydrogen fuel cell. Background technique [0002] With the continuous development of fuel cell technology, fuel cell vehicles have become the main trend of domestic development. A hydrogen fuel cell is a device that generates electrical energy through a chemical reaction with air, and its by-product is only water. Therefore, the stack reaction of a hydrogen fuel cell is a chemical process with characteristics such as huge hysteresis, uncertainty, and nonlinearity. Among them, factors such as temperature and pressure have an important impact on the operation of the stack. Hydrogen fuel cells will consume hydrogen and air during use, and the product of fuel cell power generation will make water. If the fuel cell reactants hydrogen and air cannot be supplied in time, and the temperature and gas pressure inside the hydrog...

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Problems solved by technology

However, none of the above patents can ensure that the output current and output voltage of the hydrogen fuel cell are kept in the optimal range and the timely regulation of the hydrogen intake volume and the air intake volume results in low power generation efficiency and long continuous power generation time of the hydrogen fuel cell. short

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