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

A control method and anode control technology, which are applied in the fields of fuel cell control, fuel cells, fuel cell additives, etc., can solve the problems of reduced hydrogen utilization rate, etc., and achieve faster measurement time, strong environmental adaptability, and simple and efficient implementation process. Effect

Active Publication Date: 2022-07-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Application Information

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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

Method used

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

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Embodiment 1

[0038] Based on e.g. figure 1 In the shown air-cooled fuel cell anode control system, this embodiment proposes an air-cooled fuel cell anode control method based on electrochemical impedance spectroscopy, including an exhaust cycle control method and an exhaust duration control method.

[0039] The air-cooled fuel cell anode control system includes a hydrogen cylinder, an anode hydrogen inlet valve, an air-cooled fuel cell stack, an anode exhaust valve, a fuel cell controller and an electrochemical impedance spectroscopy tester.

[0040] The exhaust cycle control method includes the following steps:

[0041] Step A1: Open the anode hydrogen inlet valve and adjust the hydrogen inlet pressure to 20KPa.

[0042]Step A2: Turn on the cathode fan, adjust the PWM duty cycle of the cathode fan to a fixed value of 50%, provide oxygen for the air-cooled fuel cell stack, and keep the temperature constant.

[0043] Step A3: Set the load current to a fixed value of 15A, and the air-coole...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04955H01M8/04298H01M8/04992H01M8/0662
CPCH01M8/04305H01M8/04992H01M8/04955H01M8/0662H01M2004/8684Y02E60/50
Inventor 高艳张文刚梅杰王仁康李凯汤浩
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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