Hydrogenation fault diagnosis method of fuel cell hydrogen system

Abstract

The invention provides a hydrogenation fault diagnosis method of a fuel cell hydrogen system. The method comprises the steps of: obtaining the temperature of each hydrogen storage cylinder in the fuelcell hydrogen system; starting a hydrogen storage cylinder with the highest temperature and closing other hydrogen storage cylinders; obtaining the initial pressure in a pipeline connected with a hydrogen storage module and a hydrogen supply module and starting timing; determining whether the timing reaches or exceeds the preset diagnosis duration or not, if yes, stopping timing and obtaining thecurrent pressure of the pipeline connected with the hydrogen storage module and the hydrogen supply module; and performing fault diagnosis treatment for the initial pressure and the current pressureof the pipeline connected with the hydrogen storage module and the hydrogen supply module. The method can perform automatic checking of whether the fuel cell hydrogen system being in the hydrogen supply state or not prior to hydrogen addition so as to avoid the safety problem that the hydrogen is injected directly because a user forgets to close the hydrogen fuel cell system.

Description

technical field [0001] The invention relates to a fault diagnosis method, in particular to a hydrogenation fault diagnosis method of a fuel cell hydrogen system. Background technique [0002] Hydrogen fuel cell vehicle technology is becoming more and more mature. As a new energy vehicle with zero pollution and zero emissions, hydrogen fuel cell vehicles have increasingly entered the transportation system and have been widely recognized by the public. Fuel cell vehicles use hydrogen as fuel, and through the fuel engine, chemical energy is efficiently converted into electrical energy to drive the vehicle. The whole process only discharges pure water, so it is the most ideal energy-saving, environmentally friendly and zero-emission vehicle to replace traditional fossil fuel vehicles in the near future Transportation. The hydrogen system of a hydrogen fuel cell generally includes multiple hydrogen bottles for storing hydrogen. The fuel cell hydrogen system has functions such as...

AI Technical Summary

Problems solved by technology

It may be dangerous if the user forgets to turn off the hydrogen fuel cell system and refuels directly

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