A device and experimental method for simulating the gas pressure variation relationship between pemfc layers
A technology of gas pressure and change relationship, applied in the analysis of materials, instruments, etc., can solve problems such as difficult to ensure the airtightness of fuel cells, and achieve the effect of avoiding complicated experiments, simplifying the experimental process, and simple and effective operation
Active Publication Date: 2021-10-08
TONGJI UNIV
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Problems solved by technology
[0006] If the pressure measuring device is directly arranged inside the fuel cell and the interlayer pressure is measured during its operation, it will be difficult to ensure the airtightness of the fuel cell. In order to obtain the pressure change relationship between the PEMFC layers, the gas diffusion layer and the catalytic layer Experimental research is carried out alone, but there is no device capable of simulating the relationship between gas pressure changes between PEMFC layers
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[0045] Taking an experimental sample with a size of 100mm*100mm as an example, under standard conditions (V m =22.4L / mol), using the equivalent conversion principle proposed by this patent to calculate the pumping rates of different gases under different current densities, the results are shown in the following table:
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Abstract
The invention relates to a device for simulating the relationship between gas pressure changes between PEMFC layers. The device includes a gas cylinder, a simulation component connected to the gas cylinder through a pipeline, a gas pressure detection component and a gas flow detection component. The simulation component includes a The left and right clamps are buckled together to form an experimental chamber. After the experimental samples are fixed by the left and right splints, the experimental chamber is divided into two independent chambers. The left chamber is connected to the gas cylinder. The right chamber is connected with the gas flow detection component, and the left chamber and the right chamber are respectively connected with the gas pressure detection component. Compared with the prior art, the invention has the advantages of equivalent detection, good air tightness, adaptability to samples of different areas, simple and effective operation, and the like.
Description
technical field [0001] The invention relates to the field of fuel cells, in particular to a device for simulating the gas pressure variation relationship between PEMFC layers. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy through the action of a catalyst. Proton Exchange Membrane Fuel Cell (PEMFC) is the most important hydrogen-oxygen fuel cell. One, which has high energy conversion efficiency (40%-60%), no pollution to the environment, long working life, low-temperature quick start, and strong system reliability. It is especially suitable for automobiles and portable electronic devices, and has broad development prospects. [0003] The gas diffusion layer is an important part of PEMFC. Most of them are porous media made of carbon paper or carbon cloth, and their thickness is about 100 μm-400 μm. Therefore, an ideal gas diffusion layer must have good air permeab...
Claims
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IPC IPC(8): G01N7/00
CPCG01N7/00
Inventor 陈会翠褚乐彬单万超
Owner TONGJI UNIV