Humidification control method for hydrogen fuel cell
A fuel cell and control method technology, applied in the direction of fuel cell control, fuel cells, fuel cell additives, etc., can solve problems such as water loss, performance deterioration, water flooding, etc., to prolong service life, protect from damage, The effect of ensuring safety
Active Publication Date: 2021-03-30
中铁轨道交通装备有限公司
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Problems solved by technology
When using hydrogen fuel cells, it is necessary to ensure the relative humidity of the stack, and it is best to control it between 90-98%. If the humidity is close to or exceeds 100%, liquid water will hinder the catalyst electrode and reduce the effective porosity of the gas diffusion layer. , and may flood out, causing an unacceptable voltage drop
If the humidity is too low, dehydration may occur, resulting in poor performance or even battery damage; at the same time, the higher the temperature inside the stack, the faster the moisture loss inside the stack. Therefore, it is necessary to accurately control the humidity according to the corresponding temperature , to ensure the normal and effective operation of hydrogen fuel cells
Method used
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Embodiment Construction
[0023] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0024] Such as figure 1 A hydrogen fuel cell with a humidification function is shown, including an electric stack 1, a hydrogen bottle 2, an air compressor 3, a hydrogen pipeline 4 arranged between the electric stack 1 and the hydrogen bottle 2, and a hydrogen pipeline 4 arranged between the electric stack 1 and the air compressor. The air pipeline 5 between the generators 3 and the control unit 6 for controlling the hydrogen fuel cell. The electric stack 1 is the core component of the hydrogen fuel cell. Hydrogen and oxygen react through the electric stack 1 to generate electric energy. The hydrogen cylinder 2 is filled with compressed hydrogen Hydrogen is supplied to the stack 1 through the hydrogen pipeline 4, and the air compressor 3 injects air into the stack 1 through the air pipeline 5. The above-mentioned controls are all controlled by the control unit 6, and...
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The invention relates to a hydrogen fuel cell with a humidifying function and a control method. The hydrogen fuel cell comprises a galvanic pile, a hydrogen cylinder, an air compressor, a hydrogen pipeline arranged between the galvanic pile and the hydrogen cylinder, an air pipeline arranged between the galvanic pile and the air compressor, and a control unit for controlling a hydrogen fuel cell.A humidifier is arranged beside the galvanic pile; a humidity sensor and a temperature sensor are arranged in the galvanic pile; the humidity sensor, the temperature sensor and the humidifier are allconnected to the control unit, the temperature sensor detects the temperature of the galvanic pile, the humidity sensor detects the humidity of the galvanic pile and transmits a signal to the controlunit, and the control unit processes the signal and outputs a control signal to the humidifier for humidification operation; through a mode of combining the humidity and the temperature, the temperature and the humidity can be monitored in real time, the humidity is kept in an optimal range at different temperatures, and accurate control can be carried out according to the temperature, so that thehydrogen fuel cell achieves the highest efficiency.
Description
technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for controlling humidification of hydrogen fuel cells. Background technique [0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. The basic principle is the reverse reaction of electrolyzed water. Hydrogen and oxygen are supplied to the anode and cathode respectively. After the hydrogen diffuses outward through the anode and reacts with the electrolyte, electrons are released to reach the cathode through an external load. When using hydrogen fuel cells, it is necessary to ensure the relative humidity of the stack, and it is best to control it between 90-98%. If the humidity is close to or exceeds 100%, liquid water will hinder the catalyst electrode and reduce the effective porosity of the gas diffusion layer. , and could potentially flood, causing an unacceptable voltage d...
Claims
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IPC IPC(8): H01M8/04119H01M8/04298H01M8/0432H01M8/04492H01M8/04791G05D22/02
CPCG05D22/02H01M8/04126H01M8/04298H01M8/0432H01M8/04492H01M8/04791Y02E60/50
Inventor 丁樱许峻峰陈建兵高峰
Owner 中铁轨道交通装备有限公司