Anode hydrogen decoupling control method and system suitable forproton exchange film fuel cell

A proton exchange membrane and fuel cell technology, applied in the direction of fuel cell control, fuel cells, fuel cell additives, etc., can solve the problems affecting the osmotic pressure of ions or molecules, affecting the electrochemical reaction rate, etc., to achieve good dynamic and static characteristics, Optimize the effect of coordinated control

Pending Publication Date: 2021-02-26
苏州智检通联技术有限公司
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Problems solved by technology

The size of gas pressure will affect the osmotic pressure of ions or molecules in the reaction process, and then affect the electrochemical reaction rate

Method used

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  • Anode hydrogen decoupling control method and system suitable forproton exchange film fuel cell
  • Anode hydrogen decoupling control method and system suitable forproton exchange film fuel cell
  • Anode hydrogen decoupling control method and system suitable forproton exchange film fuel cell

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Embodiment 1

[0074] The present invention proposes a decoupling control method suitable for proton exchange membrane fuel cell anode hydrogen gas, wherein, a typical structure of a PEMFC anode hydrogen system is as follows figure 1 shown.

[0075] To achieve the above object, the present invention is achieved through the following technical solutions:

[0076] S100, establish a PEMFC hydrogen injection system model; as figure 2 as shown,

[0077] S101. The PEMFC hydrogen injection system is a dual-input and dual-output system. Its input is the duty cycle of the hydrogen injection solenoid valve and the opening of the back pressure valve, and its output is the flow and pressure of anode hydrogen. The transfer function of the PEMFC hydrogen injection system is a second-order matrix. The input-output relationship of the PEMFC hydrogen injection system can be expressed by formula (1):

[0078]

[0079] In the formula, Q(s) is the flow rate of hydrogen, P(s) is the pressure of hydrogen ...

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Abstract

The invention discloses an anode hydrogen decoupling control method and system suitable for a proton exchange film fuel cell, and the method comprises the following steps: S100, building a PEMFC hydrogen injection system model: S101, the PEMFC hydrogen injection system is a double-input double-output system, the input of the system is the duty ratio of a hydrogen injection solenoid valve and the opening degree of a back pressure valve, the output is the flow and the pressure of anode hydrogen, and the transfer function of the PEMFC hydrogen injection system is a second-order matrix; and S102,atransfer function of the PEMFC hydrogen injection system is identifiedby adopting an M sequence system identification method; and S200, designing a decoupling controller, which sequentially comprisesthe following steps: S201, designing a feedforward compensation decoupler based on a feedforward compensation principle; and S202, designing two paths of PI controllers to respectively control flow and pressure. According to the invention, the optimal coordination control of the hydrogen flow and the back pressure is realized, so that the PEMFC system obtains good dynamic and static characteristics.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a hydrogen decoupling control method applicable to the anode of a proton exchange membrane fuel cell. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is a power generation device that converts chemical energy into electrical energy output through the oxidation-reduction reaction between hydrogen and oxygen. In recent years, it has been favored in vehicle power supplies. The world's major automakers are competing to develop fuel cell vehicles with zero emissions, high efficiency, diversified fuel sources, and renewable energy. At the same time, how to improve the system efficiency of PEMFC, increase the energy density and power density of the system, reduce the system size, and improve the water balance are of great significance for the limited vehicle space. [0003] PEMFC must work under sufficient oxygen and hydrogen supply environment and suitable tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04992H01M8/04089H01M8/04298H01M8/04746
CPCH01M8/04104H01M8/04305H01M8/04753H01M8/04992H01M2004/8684Y02E60/50
Inventor 张辉梁满志张思龙樊军
Owner 苏州智检通联技术有限公司
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