Proton exchange membrane fuel cell single cell test device under dry hydrogen test conditions

Abstract

The invention provides a proton exchange membrane fuel cell single-cell test device under a dry hydrogen test condition. The test device is mainly composed of two modules, and the flow channel area of each module has a slope structure. During cell test, water produced inside gathers downward along the slopes, and gas entering a cathode can be self-humidified and take part of water to an upper-end reaction area of a cell. By adjusting the flow rate of gas, the overall humidity inside a cell is kept relatively consistent, and the inside of the cell is prevented from being too dry or too wet locally. While the humidity at the cathode side is improved effectively, water can flow through a proton exchange membrane uniformly from the cathode side of a cell and reversely permeate into the anode side, and the performance of cells during test in a dry hydrogen atmosphere is improved.

Description

technical field [0001] The invention relates to a test device for a proton exchange membrane fuel cell, in particular to a single cell test device for a proton exchange membrane fuel cell under dry hydrogen test conditions. Background technique [0002] The fuel cell test device is one of the important components to evaluate the fuel cell. As the necessary equipment for evaluating the quality of the battery, its reasonable design will make the battery test show better performance. In recent years, in order to reduce the cost and promote the commercialization of proton exchange membrane fuel cells, it is usually necessary to use dry hydrogen as the anode fuel. [0003] When the proton exchange membrane fuel cell works, a large amount of water is generated on the cathode side. Under dry hydrogen conditions, the water will reverse osmosis through the proton membrane to the dry anode side. Under the action of air flow, the cathode will be partially flooded or too dry, which wil...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects in the prior art, the object of the present invention is to overcome the defect that the performance of the dry hydrogen test of the proton exchange membrane fuel cell is reduced, and provide a proton exchange membrane fuel cell test device with an optimized design; it has a flow channel with a slope structure design , to ensure the relatively uniform distribution of water vapor on the cathode side, so that the water at the front and rear ends of the flow channel on the cathode side can be evenly reversed to the anode side, and the current distribution of the battery membrane electrode is more uniform during the test, and the battery performance is improved.

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