Fuel cell hydrogen and air supply control method, device and system

An air supply and fuel cell technology, applied in fuel cells, electrical components, circuits, etc., can solve the problems of frequent fluctuations in the pressure difference of the proton exchange membrane, affecting the performance and life of the fuel cell, and the inability to adjust hydrogen and air pressure differences. Effects of accurate adjustment, reduction of creep, durability and running stability

Inactive Publication Date: 2019-07-05
武汉海亿新能源科技有限公司
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Problems solved by technology

[0008] However, the existing vehicle-mounted fuel cell hydrogen control device mainly uses a two-stage pressure reducing valve to set the hydrogen pressure input to the fuel cell stack at a fixed value, which cannot adjust the pressure difference between hydrogen and air, resulting in pressure on both sides of t

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  • Fuel cell hydrogen and air supply control method, device and system
  • Fuel cell hydrogen and air supply control method, device and system
  • Fuel cell hydrogen and air supply control method, device and system

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[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0031] When the fuel cell is running, the hydrogen pressure and air pressure are required to increase with the increase of the output current, so as to ensure that the performance of the stack is always in the best state. When the current is low, the hydrogen pressure and air pressure in the stack are relatively small, and when the current is high, the hydrogen pressure and air pressure in the stack are relatively high. However, in order to ensure the characteristics of the proton exchange membrane, it is necessary to ensure that the hydrogen-air pressure difference is basically a fixed value. At the same time, the required hydrogen flow rate and the air flow rate of the stack also increase with the increase of the ...

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Abstract

The invention relates to a fuel cell hydrogen and air supply control method, device and system. The method comprises the steps of: obtaining the output current of a fuel cell; determining an air flowand an air pressure required by a galvanic pile inlet according to the output current, and adjusting the fuel cell air supply according to the air flow and the air pressure required by the galvanic pile inlet; determining the hydrogen pressure required by the galvanic pile inlet according to the air pressure required by the galvanic pile inlet and a preset hydrogen-air pressure difference, and adjusting the fuel cell hydrogen supply according to the hydrogen pressure required by the galvanic pile inlet, so that a difference between the real-time pressure difference of the galvanic pile inlet and the preset hydrogen-air pressure difference is within a preset range, wherein the real-time pressure difference is a difference between the real-time hydrogen pressure of the galvanic pile inlet and the real-time air pressure of the galvanic pile inlet. The method can avoid great changes in pressure difference on both sides of a proton exchange membrane of the fuel cell, and ensure the performance and the service life of the fuel cell.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell hydrogen and air supply control method, device and system. Background technique [0002] Under the background of increasing global energy demand and intensified environmental crisis, new clean energy has attracted more and more attention. Among them, hydrogen fuel cells have the advantages of high efficiency, zero pollution, low noise and fast start-up, and have broad application prospects. They are one of the development directions of the next generation of vehicle power. [0003] A hydrogen fuel cell is a device that generates electricity by chemically reacting hydrogen and oxygen. The reaction process is the reverse process of electrolysis of water, and the reaction principle is as follows. [0004] Negative electrode: H 2 +2OH - →2H 2 O+2e - . [0005] Positive electrode: 1 / 2O 2 +H 2 O+2e - →2OH - . [0006] Battery response: H 2 +1 / 2O 2 ==H 2 O....

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Application Information

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IPC IPC(8): H01M8/0438H01M8/04492H01M8/04746H01M8/04828H01M8/0662
CPCH01M8/0438H01M8/04492H01M8/04753H01M8/04835H01M8/0662Y02E60/50
Inventor 叶麦克吴汉军全睿全琎熊荧全欢全书海
Owner 武汉海亿新能源科技有限公司
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