Method for preventing accumulation of hydrogen gas leakage of fuel cell vehicle

Abstract

The invention relates to a method for preventing the hydrogen gas in a fuel cell vehicle from leaking and accumulating. An air pipe is arranged on a vehicle casing beside the engine compartment of a fuel cell vehicle, one end of the air pipe is communicated with the engine compartment, and the other end is communicated with atmosphere, the engine compartment is communicated with the atmosphere, shutters are arranged on the both sides and / or the rear end of the vehicle casing behind the engine compartment, the air pipe is directly led out from the top part of the vehicle casing and form an inverted U shape, and form an acute angle less than 90 degrees with the driving direction, and the opening of the air pipe is downward; when the fuel cell vehicle is driven in high speed, the lower part of the opening is in vacuum state, the air in the engine compartment is sucked out, and simultaneously the air gets into the engine compartment from the shutters on the both sides or the rear end of the vehicle casing behind the engine compartment, to form an air flow loop; a pipeline ventilating fan is arranged in the air pipe, and when the fuel cell vehicle is in low speed or idle speed condition, the ventilating fan exhausts the gas out of the engine compartment by perforce through the air pipe. Compared with the prior art, the method has the advantages of hydrogen gas leakage prevention and ventilation.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a method for preventing hydrogen leakage and accumulation of a fuel cell vehicle. Background technique [0002] An electrochemical fuel cell is a device that converts hydrogen and oxidants into electrical energy and reaction products. The internal core component of the device is the membrane electrode (Membrane Electrode Assembly, referred to as MEA). The membrane electrode (MEA) is composed of a proton exchange membrane and two porous conductive materials, such as carbon paper, sandwiched between the two sides of the membrane. On the two boundary surfaces of the membrane and the carbon paper, there are even and finely dispersed catalysts for initiating electrochemical reactions, such as metal platinum catalysts. Conductive objects can be used on both sides of the membrane electrode to draw the electrons generated during the electrochemical reaction through an external circuit to form a current lo...

AI Technical Summary

Problems solved by technology

[0011] At present, the engine compartments of fuel cell vehicles are all closed designs, and the air in the compartment is not circulated. Once the fuel cell engine leaks hydrogen, it is easy to accumulate in the compartment, which is prone to explosion. The design of perforated or ordinary shutters cannot reach Ventilation and waterproof effect

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