Proton exchange membrane fuel cell capable of preventing accumulated water

Abstract

The invention discloses a proton exchange membrane fuel cell capable of preventing accumulated water. The fuel cell comprises a mounting base, a battery main body and a refrigerating device, wherein an upper cavity and a lower cavity which communicate with each other are formed in the mounting base; the lower cavity is provided with a water outlet; the battery main body is arranged in the upper cavity, and is provided with a negative electrode exhaust area; and the refrigerating device is arranged in the lower cavity, is provided with a heat absorption area which communicates with the negativeelectrode exhaust area, and is used for condensing gas discharged through the negative electrode exhaust area into liquid and discharging the liquid from the water outlet. According to the technicalscheme, the refrigerating device is directly arranged in the mounting base, and directly communicates with the battery main body, so that the contact area between the refrigerating device and the negative electrode exhaust area can be enlarged; and a relatively large temperature difference is formed between the battery main body and the heat absorption area, so that the gas discharged through thenegative electrode exhaust area is condensed into the liquid in a cold environment and discharged from the water outlet, the accumulated water in the battery main body is prevented, and the electrochemical reaction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a water-logging-proof proton exchange membrane fuel cell. Background technique [0002] During the operation of the proton exchange membrane fuel cell, the continuous electrochemical reaction inside will easily cause water to be generated at the cathode of the battery. If the water generated in the battery cannot be discharged in time, the water will cover the reaction area of ​​the catalytic layer, causing the battery to "flood" and form a water film to limit the contact between oxygen and the catalytic layer, block the gas diffusion layer, and prevent the gas from reaching the catalytic layer. The surface of the layer participates in the electrochemical reaction. At the same time, in the proton exchange membrane fuel cell stack, excessive liquid water will block the flow channel and affect the gas flow, resulting in uneven distribution of reactant gas in each single piece a...

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Problems solved by technology

[0005] The main purpose of the present invention is to propose a proton exchange membrane fuel cell for preventing stagnant water, which aims to solve the problem of the existing water drainage device and the separate arrangement of the proton exchange membrane fuel cell, which affect the efficiency of pond water removal, and the existing drainage problem. Sekisui's technical solutions are not universal

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