Humidification module of a high-power fuel cell stack tester

Abstract

The invention discloses a humidifying module of a high-power fuel cell stack tester, which includes a water supply system, a flash system, a water vapor mixing system and a control system, and a control component connected with the water supply system, the flash system and the water vapor mixing system. Connected; the water storage part in the water supply system is connected to the jet pump and the atomization part in turn through the pipeline; the flash system includes a flash chamber and a heating plate, and the atomization part is fixed above the heating plate; the water vapor connected to the flash system is mixed The system includes a mixing chamber and its internal baffles and a splitter ring located below the baffles. The splitter ring is connected to the gas supply pipeline that inputs the gas to be humidified. The gas to be humidified enters the mixing chamber through the splitter ring and is mixed with water vapor. Flow through the baffle; the invention can achieve high uniformity of water atomization, and the upper computer can adjust the heating plate to quickly evaporate water, reducing energy consumption; realize precise control of temperature and flow gas humidification, and fast conversion from high humidity to low humidity, and respond Fast speed and other advantages.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a humidification module of a high-power fuel cell stack tester. Background technique [0002] A fuel cell is an energy conversion device with the advantages of zero emission, high conversion efficiency, low noise and high safety. It is composed of membrane electrodes, bipolar plates, collector plates, end plates and fasteners, of which the membrane electrodes are the core components. The proton exchange membrane can exert its maximum ion conduction function in a wet state, and at the same time improve the overall performance and life of the stack. Therefore, a gas humidification device must be added in the test system, which can realize the humidification of the gas in the full humidity range. [0003] Common methods for gas humidification of fuel cell test equipment include bubbling humidification, spray humidification, membrane osmotic humidification, and a combination of bubbling h...

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Problems solved by technology

[0004] The shortcomings of the traditional gas humidification device: ①The response speed of the bubbling humidification method is slow, and the gas humidity is not easy to control and change, especially the process of temperature reduction takes a long time; ②The spray humidification water atomization effect is not good , there is a part of liquid water, which enters the fuel cell with the gas, causing the membrane electrode to be flooded. ③The membrane osmosis humidification method is complicated in manufacturing process, high in cost, and the humidity adjustable range is narrow; ④If large-flow gas humidification is realized, the above increase The system of the wet method is large in size, complex in structure, and consumes a lot of energy

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