Air-cooled fuel cell anode control method based on electrochemical impedance spectroscopy

Abstract

The invention provides an air-cooled fuel cell anode control method based on an electrochemical impedance spectroscopy, and belongs to the technical field of new energy power generation, the method comprises an exhaust period control method and an exhaust duration control method, and specifically, the difference between module values of an ultralow frequency point and a low frequency point in the electrochemical impedance spectroscopy is used as a basis for controlling an exhaust period; dynamic opening of the anode exhaust valve is achieved, the optimal exhaust duration is obtained based on the one-dimensional optimization thinking, and the coupling influence between the exhaust period and the exhaust duration is avoided. Compared with a traditional control method, the method has the advantages that the environmental adaptability is higher, the implementation process is simple and efficient, combination with specific engineering application is facilitated, and the problem of the air-cooled fuel cell in the engineering application is conveniently and practically solved.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation, and in particular relates to an anode control method of an air-cooled fuel cell based on electrochemical impedance spectroscopy. Background technique [0002] As a kind of clean energy, proton exchange membrane fuel cell has the characteristics of high efficiency, zero pollutant emission, long battery life and low working temperature. It is one of the research hotspots in the field of new energy. Air-cooled proton exchange membrane fuel cells eliminate the need for auxiliary equipment for realizing functions such as cooling liquid circulation and reaction gas humidification. Compared with traditional fuel cells, they have the advantages of light weight, high efficiency, and compact structure. The ideal power source for the future of electrical systems. [0003] The electrochemical reaction of the fuel cell requires sufficient hydrogen and oxygen. The cathode of the air-cooled...

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Problems solved by technology

The disadvantage of this method is that the drop of the stack voltage is not always caused by the accumulation of anode water and nitrogen, but may be caused by other factors, such as temperature changes, so judging whether the exhaust valve is open based only on the voltage may cause errors. Judgment, resulting in lower hydrogen utilization

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