Method and device for detecting hydrogen leakage of vehicle-mounted hydrogen supply system and fuel cell vehicle

Abstract

The invention provides a method and device for detecting hydrogen leakage of a vehicle-mounted hydrogen supply system and a fuel cell vehicle. The method comprises the steps: determining the current working condition of the fuel cell vehicle; determining a detection time period according to the current working condition; obtaining the hydrogen leakage quality of the vehicle-mounted hydrogen supplysystem in the detection time period; calculating the hydrogen leakage rate according to the hydrogen leakage quality and the detection time period; and when it is judged that the hydrogen leakage rate is larger than a preset value, determining that the hydrogen leakage occurs in the vehicle-mounted hydrogen supply system. According to the technical scheme provided by the invention, hydrogen leakage of the vehicle-mounted hydrogen supply system of the fuel cell vehicle can be quantitatively detected by calculating the hydrogen leakage rate, the accuracy and timeliness of hydrogen leakage detection are improved, and the problems of potential safety hazards and waste caused by hydrogen leakage are solved.

Description

technical field [0001] The invention relates to the field of detection of hydrogen leakage in a vehicle-mounted hydrogen supply system, in particular to a method and device for detecting hydrogen leakage in a vehicle-mounted hydrogen supply system and a fuel cell vehicle. Background technique [0002] A fuel cell vehicle is a vehicle powered by electricity generated by a vehicle-mounted fuel cell device. The fuel used by the vehicle-mounted fuel cell device is high-purity hydrogen or hydrogen-containing reformed gas obtained by reforming hydrogen-containing fuel. Among them, hydrogen, as the fuel of hydrogen fuel cell vehicles, is prone to leakage due to its low density and strong diffusion ability, and hydrogen is flammable and explosive, so the detection of hydrogen leakage is the key to ensure the safe operation of fuel cell vehicles key step. [0003] In the prior art, a hydrogen leak detection system composed of a hydrogen concentration sensor is arranged on a fuel cel...

AI Technical Summary

Problems solved by technology

However, due to the strong diffusion ability of hydrogen gas and its excellent escape ability, once a leak occurs in the hydrogen supply system, hydrogen gas will escape quickly and cannot be detected by the hydrogen concentration sensor in a timely and accurate manner.

Images