Hydrogen fuel supply control method, fuel cell and automobile

Abstract

The invention discloses a hydrogen fuel supply control method of a fuel cell, the fuel cell and an automobile. In the hydrogen fuel supply control method provided by the invention, a hydrogen cylindervalve is controlled to be closed in advance in a shutdown process of a fuel cell, so that hydrogen in a pipeline is just consumed after shutdown is completed, and a pressure reducing valve and the front and rear ends of a hydrogen ejector are in a balanced state. By means of the method, the problem of mechanical fatigue of the pressure reducing valve and the ejector in the system parking period is effectively solved, the durability of the pressure reducing valve and the ejector is effectively improved, and then the purpose of prolonging the service life of the pressure reducing valve and theejector is achieved; the situation that high-pressure gas at the front end of the hydrogen ejector enters a hydrogen cavity of an electric pile when the hydrogen ejector leaks inwards during parking of the system to damage the two sides of the hydrogen space of the membrane electrode of the electric pile due to bearing large pressure difference can be prevented; and the system hydrogen safety problem caused by external leakage of the pipeline between the hydrogen injector and the hydrogen cylinder during parking of the system can be prevented.

Description

technical field [0001] The invention relates to the technical field of fuel cell gas control, in particular to a hydrogen fuel supply control method. The invention also relates to a fuel cell. The present invention also relates to a vehicle comprising the fuel cell described above. Background technique [0002] Fuel cells are widely used in the field of new energy vehicles due to their environmental friendliness and high energy conversion efficiency. In fuel cell vehicles, a set of high-pressure hydrogen system is required to store and supply hydrogen. Generally, high-pressure hydrogen cylinders are used for hydrogen storage, and the common specifications are 35MPa and 70MPa; The high-pressure hydrogen is reduced to the pressure range available for the hydrogen injector of the fuel cell system. [0003] Schematic diagram of hydrogen storage and supply for vehicle-mounted fuel cell systems. High-pressure hydrogen is stored in hydrogen cylinders. The hydrogen can be release...

AI Technical Summary

Problems solved by technology

If the vehicle is parked for a long time, the pressure reducing valve and the mechanical parts inside the hydrogen injector are always in a state of fatigue, resulting in shortened service life of the pressure reducing valve and hydrogen injector

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