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A soft measurement and closed-loop control method for water content on the cathode side of a proton exchange membrane fuel cell

A technology for fuel cell cathodes and proton exchange membranes, applied in analytical materials, instruments, etc., can solve the problems of lack of accurate water content on the cathode side, real-time observation methods, etc., to achieve the effect of ensuring continuity and high efficiency, and improving operating efficiency

Active Publication Date: 2022-05-10
SOUTHEAST UNIV
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Problems solved by technology

[0005] Purpose of the invention: In view of the lack of accurate and real-time observation methods for the water content on the cathode side of the main control target for the internal humidity of the fuel cell in the prior art, the present invention provides a soft measurement method for the water content on the cathode side of the proton exchange membrane fuel cell

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  • A soft measurement and closed-loop control method for water content on the cathode side of a proton exchange membrane fuel cell
  • A soft measurement and closed-loop control method for water content on the cathode side of a proton exchange membrane fuel cell
  • A soft measurement and closed-loop control method for water content on the cathode side of a proton exchange membrane fuel cell

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Embodiment Construction

[0058] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0059] The so-called soft sensor is based on the scientific principles of physics, chemistry, etc., to carry out mathematical simulation and establish a mathematical model for calculating one or more physical data in the system for a certain physical system, which can be combined with the industrial control platform to measure physical data. In order to fully study the change of humidity inside the fuel cell, the mechanism analysis and modeling of the water content on the cathode side, the mass fraction of oxygen at the outlet of the cathode side, and the mass of liquid water on the cathode side were carried out, so as to accurately and timely calculate the water content on the cathode side. On-line control of the humidity inside the fuel cell provides the means.

[0060] The present invention adopts a soft measurement method of the water cont...

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Abstract

The invention discloses a soft measurement method for the water content of the cathode side of a proton exchange membrane fuel cell, wherein the soft measurement method for the water content of the cathode side comprises the following steps: collecting the measurable parameters of the inlet and outlet of the proton exchange membrane fuel cell in real time, including the fuel cell The temperature, relative humidity and pressure of the cathode inlet, the temperature and pressure of the cathode outlet, and the internal reaction temperature of the fuel cell; then in the modeling software, the soft measurement of the water content on the cathode side is realized based on the water transfer mechanism model inside the fuel cell. The soft measurement method of the present invention can be used to accurately and timely calculate the mass of water vapor contained in the cathode side, combined with the saturated water vapor content at the current reaction temperature of the fuel cell, to reflect the quality of the internal operating state of the fuel cell, especially It is able to judge whether there is water accumulation inside the fuel cell, and make the closed-loop control of the humidity inside the fuel cell possible.

Description

technical field [0001] The invention relates to a soft measurement method for water content at the cathode side of a proton exchange membrane fuel cell, belonging to the field of automatic control of new energy utilization. Background technique [0002] The internal humidity of a proton exchange membrane fuel cell is an important index for evaluating its performance during operation. The change of the external load and the change of the inlet air parameters will cause the change of the internal humidity, which will cause the phenomenon of "membrane drying" and "water blocking" in severe cases. Therefore, the control of the internal humidity of the fuel cell is particularly important. The water content of the cathode side is the main control target of the internal humidity of the fuel cell. Whether it can be accurately and timely observed and controlled directly determines the operation status of the fuel cell. [0003] Scholars at home and abroad have done a lot of research...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N7/00G01N7/10
Inventor 沈炯符灏孙立
Owner SOUTHEAST UNIV
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