Humidifier used for high-power duel cell test board

Abstract

The invention discloses a humidifier used for a high-power duel cell test board. The humidifier comprises a bubble humidifying area, a spraying humidifying area located on the upper portion of the bubble humidifying area and a water storing area located on the lower portion of the bubble humidifying area, space is reserved between the bubble humidifying area and the spraying humidifying area, anda gas inlet is formed in the lower portion of the bubble humidifying area; a gas outlet and a deionized water inlet are formed in the top of the spraying humidifying, a deionized water outlet is formed in the bottom of the water storing area, and the deionized water inlet is connected with the deionized water outlet through an external pipeline. The humidifier adopts the mode of combining bubble humidifying with spraying humidifying, a good humidifying effect can be achieved, and a filler with the high specific surface area of the spraying humidifying area can achieved efficient humidifying, and it is avoided that liquid water flows into a fuel cell; a spraying device is adopted for replacing a spraying nozzle, control is simple, and cost is low; no rotary components are arranged in the humidifier, and the service life is long.

Description

technical field [0001] The invention relates to water management of a proton exchange membrane fuel cell, in particular to a reaction gas humidification technology for a fuel cell test bench. Background technique [0002] Proton exchange membrane fuel cells have the advantages of high energy conversion efficiency, environmental friendliness, simple structure, and operation methods. They are one of the ideal candidate power sources for aerospace, underwater submarines, road transportation, distributed power stations, and backup power sources. After years of development, fuel cell technology has gradually entered the initial stage of commercialization. Especially in recent years, the demand for high-power fuel cells for electric vehicles has become increasingly urgent. [0003] The membrane electrode is the core component of the fuel cell. The proton exchange membrane plays the role of conducting electrons and blocking the cathode and anode gases. The conduction of protons in ...

AI Technical Summary

Problems solved by technology

Chinese patent CN104716357 discloses a bubbling humidifier with the function of preventing water return. This method has simple equipment, simple and convenient process, and low cost. There is a problem with liquid water getting into the fuel cell

Chinese patents CN101577338 and CN1753223 disclose spray humidifiers. In this method, liquid water is directly injected into the reaction gas. The gas-liquid mixture is not uniform, and all the liquid water cannot be vaporized, which may cause the problem of flooding the diffusion layer of the fuel cell. And the nozzle control is relatively complicated. Chinese patent CN105226310 discloses a membrane humidifier. The permeable membrane humidification process is mature and easy to operate, but the cost is high, the life is short, and the humidification efficiency is low. High-power fuel cell stacks need The volume of the membrane humidifier is large, which is not conducive to the reduction of the volume of the test platform and the reduction of the cost. In order to solve the above problems, the present invention provides the following technical solutions

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