Fuel cell vehicle and hydrogen safety control method, device and system thereof

Abstract

The invention provides a fuel cell vehicle and a hydrogen safety control method, device and system thereof, and the method comprises the steps: detecting the pressure and the temperature of a hydrogenstorage bottle in real time, and determining the mass of hydrogen discharged by a hydrogen storage bottle in a set time according to the pressure and the temperature of the hydrogen storage bottle atdifferent moments and the volume of the hydrogen storage bottle; determining the hydrogen release rate of the hydrogen storage bottle according to the mass of the hydrogen released by the hydrogen storage bottle within the set time, the set time and the hydrogen density under the standard condition; and if the hydrogen storage bottle deflation rate is greater than the set deflation rate maximum value, controlling the hydrogen storage bottle to stop deflation. According to the invention, the temperature and the pressure of the hydrogen storage bottle can be detected by using the existing temperature sensor and pressure sensor on the fuel cell vehicle, the hydrogen leakage can be prevented without using an overflow valve, and the cost of a hydrogen system is reduced; meanwhile, the overflowvalve is not needed so that high-pressure pipeline joints are greatly reduced, pipeline leakage points are reduced, the safety of a hydrogen system is improved, and the safe operation of the fuel cell vehicle is ensured.

Description

technical field [0001] The invention belongs to the technical field of fuel cell vehicles, and in particular relates to a fuel cell vehicle and its hydrogen safety control method, device and system. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of fuel into electrical energy. It only needs to feed fuel and oxidant to continuously output electrical energy. It has the advantages of high energy conversion rate, clean and environmental protection. Due to its advantages of high efficiency and zero emission, fuel cell vehicles have become an important direction for the development of new energy vehicles. [0003] However, the current hydrogen storage method of fuel cell vehicles is to use high-pressure hydrogen storage bottles for storage. Compared with traditional fuel vehicles, there are disadvantages such as difficult fuel storage and easy leakage. [0004] In order to prevent a large amount of high-pressure hydrogen in the hy...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a hydrogen safety control method for a fuel cell vehicle to solve the problem of high cost caused by using an overflow valve to prevent hydrogen leakage; the invention also provides a hydrogen safety control device for a fuel cell vehicle to solve The problem of high cost caused by the use of an over-flow valve to prevent hydrogen leakage; the present invention also provides a hydrogen safety control system for fuel cell vehicles to solve the problem of high cost caused by the use of an over-flow valve to prevent hydrogen leakage; the present invention Also provided is a fuel cell vehicle for solving the problem of high cost caused by adopting an overflow valve to prevent hydrogen leakage

Images