Quantitative method for selection of operating conditions for proton exchange membrane fuel cells monolithic and cell stacks
A proton exchange membrane and fuel cell technology, applied in fuel cells, electrical components, electrochemical generators, etc., can solve problems such as increased power consumption of accessories, inability to provide quantitative evidence for fuel cell working conditions, and reduced efficiency of fuel cell systems
Active Publication Date: 2021-02-12
TSINGHUA UNIV
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Problems solved by technology
However, increasing the pressure and flow rate of the reaction gas of the fuel cell stack or a single piece at the same time will lead to a significant increase in the power consumption of the accessories of the reaction gas supply system, an increase in the operating load of the accessory system, and often lead to a decrease in the efficiency of the fuel cell system
Under the constraints of the two goals of fuel cell system efficiency and fuel cell water content adjustment, the existing technology cannot provide a quantitative basis for the selection of fuel cell working conditions
Method used
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[0051] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0052] The structure of the proton exchange membrane fuel cell monolith of the embodiment of the present application is as follows figure 1 Described, by bipolar plate (BP, Bipolar Plate) 1, cathode gas diffusion layer (CGDL, Cathode Gas Diffusion Layer) 2, cathode catalyst layer (CCL, Cathode Catalyst Layer) 3, proton exchange membrane (PEM, Proton Exchange Membrane ) 4, an anode catalyst layer (ACL, Anode Catalyst Layer) 5, an anode gas diffusion layer (AGDL, Anode Gas Diffusion Layer) 6, and a bipolar plate 1 are assembled in sequence. The inside of the bipolar plate 1 on the left side ...
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The application discloses a method for selecting and quantifying the working conditions of a proton exchange membrane fuel cell single piece and a method for selecting and quantifying the working conditions of a proton exchange membrane fuel cell stack. The above method draws the oxygen partial pressure equipotential line diagram in the exhaust air of the fuel cell monolith or the fuel cell stack, and selects the working conditions along the oxygen partial pressure equipotential line, so that the fuel cell monolith or the fuel cell stack is in each Run stably for a period of time under working conditions, record output voltage data, calculate statistical indicators under each working condition, and optimize working conditions. When all the working conditions meet all the expected indicators, the last remaining working condition is the working condition selected by the fuel cell monolith or the fuel cell stack. The method provides a selection and quantification method for improving the working efficiency of the proton exchange membrane fuel cell and effectively regulating the water content of the proton exchange membrane fuel cell.
Description
technical field [0001] The present application relates to but not limited to the field of fuel cells, specifically, but not limited to a method for selecting and quantifying the working conditions of a single proton exchange membrane fuel cell and a method for selecting and quantifying the working conditions of a proton exchange membrane fuel cell stack. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC) is an electrochemical device that directly converts chemical energy into electrical energy. It can convert the chemical energy stored in hydrogen and oxygen into electrical energy and generate water. Hydrogen often comes from hydrogen Storage devices (such as high-pressure hydrogen cylinders), while the oxygen can come from air or cylinders containing oxygen. [0003] The proton exchange membrane fuel cell continuously outputs electric energy to the outside world, and the outside world needs to continuously supply hydrogen and oxygen to the fuel cell, s...
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IPC IPC(8): H01M8/0432H01M8/0438H01M8/04537H01M8/04992
CPCH01M8/04343H01M8/04402H01M8/04552H01M8/04992Y02E60/50
Inventor 洪坡李建秋侯之超徐梁飞欧阳明高
Owner TSINGHUA UNIV