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Method and system for rapidly controlling water content in proton exchange membrane fuel cell

A proton exchange membrane, fuel cell technology, applied in fuel cell control, fuel cells, fuel cell additives, etc., can solve the problems of multiple leads, oscillation, long adjustment time, long AC impedance spectrum test time, etc., to suppress oscillation Amplitude, satisfying fast response, good control effect

Pending Publication Date: 2022-05-27
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The voltage-based water management method requires more leads, and the prediction effect on water faults is not ideal, and it is impossible to distinguish between water-flooded and dry membranes; although the impedance-based water management method has a good diagnostic effect, the AC impedance spectrum test time Long, unable to meet the requirements of online and real-time
However, after monitoring the water content inside the proton exchange membrane fuel cell, the use of conventional PID control has problems such as easy oscillation and long adjustment time, which cannot meet the rapidity requirements

Method used

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  • Method and system for rapidly controlling water content in proton exchange membrane fuel cell
  • Method and system for rapidly controlling water content in proton exchange membrane fuel cell
  • Method and system for rapidly controlling water content in proton exchange membrane fuel cell

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Embodiment 1

[0050] This embodiment provides a rapid control method for the internal water content of a proton exchange membrane fuel cell, such as figure 1 shown.

[0051] A 156W proton exchange membrane fuel cell (parameters shown in Table 1) is taken as an example for description.

[0052] Table 1

[0053] slices 1 Effective area 275cm 2

Runner parameter L / nAD h 2

4.8×10 10

Flow field parallel channel Plate material Metal rated power 156W@0.6V

[0054] First, the cathode pressure drop value of the proton exchange membrane fuel cell under this condition is collected according to the real-time operating data.

[0055] According to the pressure drop generated inside the PEM fuel cell (along the way resistance, gravity head, hydrogen consumption, etc.), ignoring the acceleration loss caused by the gas consumption and the change of the inlet and outlet flow rates, the pressure loss after the fluid passes through the flow channel...

Embodiment 2

[0073] This embodiment provides a rapid control system for the internal water content of a proton exchange membrane fuel cell, such as Figure 5 shown, it includes:

[0074] Cathode pressure drop value acquisition unit: collects the cathode pressure drop value inside the proton exchange membrane fuel cell under actual working conditions;

[0075] Cathode single-phase flow pressure drop model building unit: build a cathode single-phase flow pressure drop model according to the cathode pressure drop value generated inside the proton exchange membrane fuel cell;

[0076] Parameter identification unit: identify the parameters of the cathode single-phase flow pressure drop model through a hybrid algorithm of genetics and particle swarm optimization;

[0077] Internal water state judgment unit: establish the coupling relationship between the water fault and the cathode single-phase flow pressure drop model, and judge the internal water state of the proton exchange membrane fuel cel...

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Abstract

The invention discloses a rapid control method and system for the water content in a proton exchange membrane fuel cell. According to the method, a cathode single-phase flow pressure drop model is constructed according to a cathode pressure drop value generated in the proton exchange membrane fuel cell, parameter identification of the established pressure drop model is completed through a heredity and particle swarm optimization hybrid algorithm, and a coupling relationship between each water fault type and the pressure drop model is established. And finally, the self-adaptive fuzzy PID is used for controlling the water content to be kept in a normal range, so that the stable operation of the proton exchange membrane fuel cell in a normal state is maintained in real time. According to the invention, the type of the water fault can be accurately judged on line, simple control of a complex system is realized by using the self-adaptive fuzzy PID controller, a good control effect can be obtained, and the operation stability of the proton exchange membrane fuel cell is effectively ensured.

Description

technical field [0001] The invention belongs to the field of proton exchange membrane fuel cells, and relates to fault handling of proton exchange membrane fuel cells, in particular to a rapid control method and system for water content in the proton exchange membrane fuel cell. Background technique [0002] Electricity is at the heart of energy technology. The current dominant thermal power generation in the power industry has many drawbacks. For example, limited by the Carnot cycle and equipment materials, the power generation efficiency is only 33% to 35%; the utilization of traditional energy has caused serious pollution to the environment. Fuel cell power generation is the process of directly converting the chemical energy of fuel into electrical energy. Because it is not limited by the Carnot cycle, the power generation efficiency can reach 50% to 70%. It is the fourth power generation technology after thermal power, hydropower and nuclear power. Among many proton exc...

Claims

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Application Information

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IPC IPC(8): H01M8/04828H01M8/04537H01M8/04298H01M8/04992H01M8/04664
CPCH01M8/04828H01M8/04559H01M8/04992H01M8/04305H01M8/04679Y02E60/50
Inventor 林达李志浩汪湘晋王激华马丽军叶夏明谢长君杨扬倪云丽赵波张雪松章雷其
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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