Hydrogen fuel supply control method, fuel cell and automobile

Abstract

The invention discloses a hydrogen fuel supply control method for a fuel cell, a fuel cell and an automobile. In the hydrogen fuel supply control method provided by the present application, the shutdown is completed by controlling the early closing of the hydrogen cylinder valve during the shutdown process of the fuel cell. After that, the hydrogen in the pipeline is just consumed, so that the pressure at the front and rear ends of the pressure reducing valve and the hydrogen injector is in a balanced state. This method effectively solves the mechanical fatigue problem of the pressure reducing valve and the injector during the parking of the system, and effectively improves the Its durability, and then achieve the purpose of prolonging its service life. At the same time, this method can prevent the high-pressure gas at the front end of the hydrogen injector from entering the hydrogen chamber of the stack when the hydrogen injector leaks during the parking period of the system, causing damage to the hydrogen and air sides of the stack membrane electrode due to a large pressure difference; this method It can prevent the leakage of the pipeline between the hydrogen injector and the hydrogen cylinder during the parking period of the system, which leads to the hydrogen safety problem of the system.

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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