A metal composite gasket for high temperature proton exchange membrane fuel cell and its application

Abstract

The present invention provides a metal composite sealing pad for a high-temperature proton exchange membrane fuel cell, and applications thereof. The metal composite sealing pad comprises a hollow ring-shaped sheet-like sealing metal substrate, wherein more than two through holes are arranged close to the hollow region and on the sealing substrate, first annular sealing bosses are circumferentially arranged around each through hole on one side surface of the substrate, the other side surface of the substrate corresponding to the first annular sealing bosses is provided with annular concave grooves circumferentially around the through holes, any two through holes are separated by the annular sealing bosses circumferentially around the through holes, second annular sealing bosses are arranged on one side surface of the sealing metal substrate and circumferentially around the hollow region and the through holes, the other side surface of the substrate corresponding to the second annular sealing bosses is provided with annular concave grooves circumferentially around the through holes, the first annular sealing bosses and the second annular sealing bosses are positioned on one side surface of the sealing substrate, and both side surfaces of the sealing substrate are respectively provided with an insulating anticorrosion coating.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a high-temperature proton exchange membrane fuel cell gasket. Background technique [0002] Fuel cell is a kind of energy conversion device that directly converts fuel chemical energy into electrical energy. It has many advantages such as high efficiency, no pollution, and low noise. It has broad application prospects in the fields of power supply, backup power supply and mobile power supply. [0003] Hydrogen is the preferred fuel for fuel cells, but its large-scale application is limited due to many problems in the preparation, storage, and transportation of hydrogen. The use of liquid fuels (methanol, ethanol, diesel, etc.) to reform hydrogen production is an effective solution. Generally, the carbon monoxide content in the reformed gas is not less than 5000ppm, but the low-temperature (80°C) proton exchange membrane fuel cell based on Nafion membrane has a carbon monoxi...

AI Technical Summary

Problems solved by technology

The thickness of the fuel cell gasket is generally about 200 microns. Fluorine rubber is a commonly used high-temperature sealing material, but it is not easy to make it thinner in the process. In this case, the thickness deviation is large, resulting in uneven compression ratio of the battery and even leakage, which affects battery performance.

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