Membrane humidifier for fuel cells

Abstract

The invention discloses a membrane humidifier for fuel cells, which comprises a cylindrical shell, humidification tubes, a first baffle and a second baffle plate, wherein each humidification tube adopts a two-layer structure; the outer layer of the humidification tube is an aramid paper tube; the inner layer of the humidification tube is a stainless-steel screen stencil; and the two ends of the humidification tube are respectively fixed on the first baffle and the second baffle plate and are sealed in the cylindrical shell, so as to form a tube side and a shell side. The invention further discloses a fuel cell device comprising the membrane humidifier. According to the membrane humidifier for fuel cells, two different gases are conveyed to the tube side and the shell side, and humidity exchange and temperature exchange are carried out through the tube walls of the humidification tubes, so that inlet air of the fuel cells can be humidified and heated effectively and the performance of the fuel cells can be played better; and the membrane humidifier is simple in preparation technology, excellent in performance, lower in cost and long in service life.

Description

technical field [0001] The invention relates to a humidifier for a fuel cell, in particular to a membrane humidifier for a fuel cell made of aramid paper. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy stored in fuel (such as hydrogen) and oxidant (such as oxygen) into electrical energy through an electrochemical reaction. It has high efficiency, environmental friendliness, good maintainability, and easy use , fuel diversification, fast response, wide power range, modular power generation unit, excellent performance at partial load, etc., are very suitable for use as mobile and decentralized power sources. As a kind of fuel cell, proton exchange membrane fuel cell also has the advantages of quick start, long life, high specific energy, low operating temperature, fast response, no corrosion of electrolyte, no leakage, etc., with broad application prospects and great market potential. Industrial structure upgradin...

AI Technical Summary

Problems solved by technology

However, the currently used membranes are mainly organic membranes, which are expensive, easily deformed, and have poor pressure resistance. After a long period of use, the membrane is easily damaged, resulting in the communication of intake and exhaust.

Moreover, for vehicle-mounted high-power fuel cells, the required membrane humidifiers are generally bulky, and the membrane humidifiers that usually use organic membranes are relatively heavy, which limits their application, especially in Vehicle-mounted high-power fuel cells, which are sensitive to weight

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