Device for simulating PEMFC interlayer gas pressure change relation and experimental method

Abstract

The invention relates to a device for simulating a PEMFC interlayer gas pressure change relation, the device comprises a gas cylinder, a simulation assembly connected with the gas cylinder through a pipeline, a gas pressure detection assembly and a gas flow detection assembly, the simulation assembly comprises a left clamp and a right clamp which are mutually buckled through a bolt, and thus an experiment chamber is formed; an experiment sample is fixed through a left clamping plate and a right clamping plate and then divides the experiment chamber into a left cavity and a right cavity which are independent of each other, the left cavity is connected with the gas cylinder, the right cavity is connected with the gas flow detection assembly, and the left cavity and the right cavity are connected with the gas pressure detection assembly. Compared with the prior art, the device and method have the advantages of equivalent detection, high air tightness, adaptability to samples with different areas, simplicity and effectiveness in 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...

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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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