A single cell and stack of a wave-shaped fuel cell

Abstract

The invention relates to a corrugated fuel cell single cell and electric stack, the single cell includes an anode plate (1), a cathode plate (2) and a membrane electrode assembly (3), and the anode plate (1) is a corrugated shaped structure, on which a number of anode flow channels (101) and anode ridge plates (102) are arranged side by side, and the cathode plate (2) adopts a wave-shaped structure intermeshed with the anode plate (1), on which the A number of cathode flow channels (201) and cathode ridge plates (202), the membrane electrode assembly (3) is installed between the anode plate (1) and the cathode plate (2), and the single cell is presented along the width direction of the flow channel Wave-shaped structure; multiple single cells are stacked in sequence to form a fuel cell stack. Compared with the prior art, the present invention significantly increases the reaction area per unit volume of the fuel cell through the wave-shaped structural design, thereby increasing the power density of the fuel cell, and has less changes to the existing processing and manufacturing technology, and has high production feasibility .

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a single fuel cell and an electric stack with wave-shaped structure characteristics. Background technique [0002] With the depletion of fossil fuels, hydrogen energy is gaining more and more attention as a clean and efficient form of energy. A proton exchange membrane fuel cell (PEMFC) is a device that generates electricity through the electrochemical reaction of hydrogen and oxygen. Start-up, no electrolyte loss, easy water discharge, high specific power and specific energy have outstanding advantages. The traditional PEMFC is mainly composed of bipolar plates, membrane electrode assemblies (MEA) and other components. The bipolar plates are divided into anode plates and cathode plates, which can realize the current conduction in the battery, distribute the reaction gas and cooling liquid, and discharge the reaction. The product affects the uniform reaction and water and gas ...

AI Technical Summary

Problems solved by technology

However, the planar structural design limits the reaction utilization rate of the membrane electrode assembly per unit volume, resulting in a limited increase in fuel cell power density.

[0004] After researching the literature of the prior art, it was found that a tube-and-tube fuel cell integrated with a membrane electrode assembly and a support tube disclosed in the Chinese invention patent CN101465438A adopts a non-electrode plate design. Although the reaction area can be increased, it is difficult to circulate the cooling liquid and restrict the power. The density is increased, and the processing is difficult, and the cost of mass production is high

Chinese invention patent CN109768298A discloses a fuel cell that combines the functions of a bipolar plate and a gas diffusion layer (GDL) to simplify the bipolar plate, but it is difficult to realize the GDL including internal flow channels, and the water management and cooling performance of the battery are poor. affected

Chinese invention patent CN101937997A adopts a curved fuel cell design, which can improve the mechanical properties of the battery components and the installation performance of the battery, but the proportion of the inner membrane electrode per unit volume in the battery changes slightly, and the power density of the battery is limited.

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