Hydrogen leakage detection method and system for hydrogen fuel cell vehicle and hydrogen fuel cell vehicle

Abstract

The invention relates to a hydrogen leakage detection method and system for a hydrogen fuel cell vehicle and the hydrogen fuel cell vehicle, which aim to improve the hydrogen leakage detection precision. The hydrogen system comprises a hydrogenation port assembly, a one-way valve assembly, a hydrogen storage bottle assembly, a bottle valve assembly and a pressure reducing valve assembly which aresequentially communicated through a high-pressure hydrogen pipeline, and a hydrogen inlet electromagnetic valve assembly, a hydrogen spraying valve assembly and a fuel cell stack which are sequentially communicated through a medium-pressure hydrogen pipeline. The hydrogen inlet electromagnetic valve assembly is communicated with the outlet side of the pressure reducing valve assembly through the medium-pressure hydrogen pipeline, and the leakage detection system comprises a high-pressure pressure sensor used for detecting the pressure in the high-pressure hydrogen pipeline between the cylindervalve assembly and the pressure reducing valve assembly, a medium-pressure pressure sensor which is used for detecting the pressure in the medium-pressure hydrogen pipeline between the pressure reducing valve assembly and the hydrogen inlet electromagnetic valve assembly, an FCU controller which is connected with the high-pressure pressure sensor and the medium-pressure pressure sensor through signal lines, a gateway which is connected with the FCU controller through a signal line, and an instrument which is connected with the gateway through a signal line.

Description

technical field [0001] The invention belongs to the field of hydrogen fuel cell vehicles, and in particular relates to a hydrogen leakage detection method and system for a hydrogen fuel cell vehicle and a hydrogen fuel cell vehicle. Background technique [0002] Hydrogen fuel cell vehicles mainly use high-pressure gaseous hydrogen storage, and the storage pressure is mainly 35MPa and 70MPa; due to the relatively small molecular weight of hydrogen, it is easy to leak and permeate, and hydrogen leakage and accumulation will cause risks such as combustion and explosion. [0003] For hydrogen leakage, the current main vehicle control method is: arrange hydrogen leakage detection sensors 1 in each potential leakage area, detect the leaked hydrogen concentration through hydrogen leakage detection sensors 1, and then, the sensor signal of hydrogen leakage detection sensor 1 is controlled by HMS2 and FCU and then transmitted to the meter 5 through the gateway 4; the FCU controller 3...

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Problems solved by technology

[0003] For hydrogen leakage, the current main vehicle control method is: arrange hydrogen leakage detection sensors 1 in each potential leakage area, detect the leaked hydrogen concentration through hydrogen leakage detection sensors 1, and then, the sensor signal of hydrogen leakage detection sensor 1 is controlled by HMS2 and FCU and then transmitted to the meter 5 through the gateway 4; the FCU controller 3 sends alarm signals of different levels to the meter 5 by analyzing and judging the hydrogen concentration, and the meter 5 sends out text and alarms to remind the user according to the hydrogen concentration level; There are many connection points in the pipeline, the layout of parts is scattered, and the layout of the hydrogen concentration detection sensor 1 is limited, resulting in the failure to monitor hydrogen leakage in some areas

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