Hydrogen leakage prevention and safety guarantee method and device for fuel cell system in closed environment

Abstract

The invention provides a hydrogen leakage prevention and safety guarantee method and device for a fuel cell system in a closed environment. The device comprises a sealed detachable shell, a control unit, a display unit, a gas cylinder, an exhaust pump, a sensor, a valve and the like. In the specific implementation mode, the fuel cell system is arranged in the sealed detachable shell, the state of the device is detected by utilizing a sensor, the control unit is used for controlling, so that the device is filled with inert gas with certain pressure, and the inert gas is controlled to enter and exit by adopting an exhaust pump and an electromagnetic valve; according to the internal hydrogen leakage amount, the external hydrogen leakage amount, the hydrogen leakage amount per unit time and related set threshold values, measures such as inert gas replacement, shutdown and alarm are taken. The device is effectively prevented from leaking a large amount of hydrogen, explosion is prevented, safety is improved, and the device is suitable for closed environments such as underwater environments and mine tunnels.

Description

technical field [0001] The invention relates to the technical field of proton exchange membrane fuel cells, in particular to a hydrogen leakage prevention and safety assurance method and device for a fuel cell system in a closed environment. Background technique [0002] The proton exchange membrane fuel cell system can directly convert the chemical energy of hydrogen into electrical energy. Its high energy conversion efficiency and no pollution have attracted much attention and have broad application prospects in various fields. In relatively closed environments such as underwater, mines, submarines, and caves, the space is narrow and airtight, the air circulation is not smooth, and it is difficult to overhaul, which requires high reliability of the fuel cell system. The commercial fuel cell system requires high power and requires a large flow of hydrogen and air. The gas supply pipeline of the fuel cell is not tightly sealed, and gas leakage is likely to occur. The leaked ...

AI Technical Summary

Problems solved by technology

Commercial fuel cell systems require large power and require large flow rates of hydrogen and air. The gas supply pipeline of the fuel cell is not tightly sealed, and gas leakage is likely to occur. The leaked hydrogen gas mixed with air is prone to explosion, causing serious safety problems.

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