A hydrogen recovery device for a proton exchange membrane fuel cell

Abstract

The invention discloses a hydrogen recovery device for a proton exchange membrane fuel cell, comprising a hydrogen storage tank, an ejector, a first preheater, a liquid level sensor, a signal processor, a solenoid valve and a first liquid collecting and exhausting tank. The hydrogen storage tank is communicated with the first inlet of the ejector, the outlet of the ejector is communicated with the inlet of the first preheater through the three-way valve A, and the outlet of the first preheater is communicated with the anode inlet of the fuel cell; The liquid level sensor is built in the anode flow field of the fuel cell, and the liquid level sensor is connected with the solenoid valve through the signal processor; the inlet of the solenoid valve is connected with the anode outlet of the fuel cell, and the outlet of the solenoid valve is connected to the first liquid collector through the pipeline. The air box, the inner top of the first liquid collecting and exhausting box is communicated with the second inlet of the ejector through a pipeline. The beneficial effects of the invention are as follows: the liquid level sensor cooperates with the signal processor to realize the opening and closing of the electromagnetic valve, when the electromagnetic valve is closed, the anode of the fuel cell is closed to improve the utilization rate of hydrogen; when the electromagnetic valve is opened, the battery can be effectively prevented from flooding , and hydrogen can also be recovered through an ejector.

Description

technical field [0001] The invention relates to proton exchange membrane fuel cell technology, in particular to a hydrogen recovery device for proton exchange membrane fuel cell. Background technique [0002] Since the beginning of the 21st century, with the huge investment in hydrogen energy research by governments and R&D institutions of various countries, many key technologies in the process of hydrogen energy utilization, such as high-efficiency hydrogen production, safe storage and transportation of hydrogen, and new fuel cells, have been gradually overcome. More and more hydrogen-based products have entered people's production and life. [0003] The stack itself is a complex body including various physical and chemical reaction processes such as gas diffusion, mass transfer and electrochemical reaction. Fuel cells usually directly convert chemical energy into electrical energy under the action of catalysts. In theory, as long as fuel cells can be refueled in time, the...

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Problems solved by technology

These devices all have defects such as high power consumption, difficulty in sealing, and small working range.

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