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A closed-loop control method for fuel cell water management

A fuel cell water and fuel cell technology, applied in the direction of fuel cells, fuel cell additives, adaptive control, etc., can solve problems such as limited scope of application, and achieve the effects of short control period, clear control objectives, and favorable engineering applications

Active Publication Date: 2015-08-19
TSINGHUA UNIV
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Problems solved by technology

These methods improve the ability of fuel cell water management, but because they are all feed-forward open-loop optimization methods, the scope of application is limited, and they can only meet the use of some fuel cell systems under certain working conditions.

Method used

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  • A closed-loop control method for fuel cell water management
  • A closed-loop control method for fuel cell water management
  • A closed-loop control method for fuel cell water management

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Embodiment Construction

[0016] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0017] figure 1 is the experimental curve of the method of the present invention applied on a double-sheet fuel cell. exist figure 1 Among them, the method of the present invention can be explained as follows:

[0018] (1) The parameters of the anode gas pressure drop control interval of the fuel cell in this figure are designed as: α=1.025, β=1.075. The judgment time is designed as: t 1 =180,t 2 =60.

[0019] (2) From about 860s to 920s, the actual value of the anode gas pressure drop is continuously higher than the upper limit of the control interval and exceeds the judgment time t 2 , illustrating the tendency for fuel cell flooding to occur. Start the operation of the fuel cell water management closed-loop control method, increase the fuel cell temperature T, and obtain ΔT=5 through the state solution at this time.

[0020] (3) Incre...

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Abstract

The invention provides a water management closed-loop control method for a fuel cell. The water management closed-loop control method is characterized in that a theoretical calculating value of the anodic gas pressure drop of the fuel cell is solved, an anodic gas pressure drop control interval for ensuring a good water management state is set, when the numerical value of the anodic gas pressure drop exceeds the control interval, the numerical value is in the control interval again by adjusting the temperature of the fuel cell so as to complete water management closed-loop control, and after the fuel cell is reset to an initial temperature, the fuel cell is still in a good water management state. The water management closed-loop control method has the advantages that the control interval is calculated according to the anodic gas pressure drop theory of water management, so that the control objective is clear; by adjusting the reaction temperature of the fuel cell, the control interval is moved, the numerical value of the anodic gas pressure drop is in the control interval, and the control manner is simple and easy to operate and realize; and an appropriate temperature adjusting numerical value can be solved, the state of the anodic gas pressure drop can be observed in real time, the control objective is clear, the water management control period is short, and the engineering application is facilitated.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a fuel cell water management closed-loop control method. Background technique [0002] Energy saving and environmental protection are two major themes in today's world, and fuel cells are one of the best solutions to solve these two problems. Fuel cells have the advantages of simple structure, high efficiency, and zero emissions, and can be widely used in many fields such as mobile energy or stationary power. Water management is an important and difficult point in fuel cell technology. The goal of fuel cell water management is to prevent fuel cells from flooding or water shortage and keep the internal water content within a reasonable range. Poor water management can directly affect the performance of fuel cells and even shorten the service life of fuel cells, but it is difficult to achieve precise control due to its complex multivariate nonlinearity. Existing water manageme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04G05B13/02H01M8/04701H01M8/04746
CPCY02E60/50H01M8/04992
Inventor 裴普成宋满存查鸿山
Owner TSINGHUA UNIV
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