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Asymmetric interlaced flow passage double pole plate of proton exchange membrane fuel cell

A proton exchange membrane and fuel cell technology, applied in fuel cells, fuel cell parts, battery electrodes, etc., can solve the problems of fuel cell performance impact, reduce the utilization rate of electrode catalysts, etc.

Inactive Publication Date: 2005-11-30
BEIJING UNIV OF TECH
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Problems solved by technology

[0007] Although compared with the serpentine flow channel and the parallel flow channel, the staggered flow channel has the above-mentioned advantages, but the design of the existing staggered flow channel fluid bed adopts the symmetrical design of the same width of the inlet flow channel and the outlet flow channel (see the appendix figure 1 ), such a design makes there still exist a low-concentration region of the reactant in the part corresponding to the porous medium electrode and the outlet channel, and the area of ​​the low-concentration region still accounts for a considerable proportion in the effective area of ​​the battery, thereby reducing the utilization of the electrode catalyst rate, the performance of the fuel cell at high current densities is also significantly affected

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  • Asymmetric interlaced flow passage double pole plate of proton exchange membrane fuel cell
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  • Asymmetric interlaced flow passage double pole plate of proton exchange membrane fuel cell

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Embodiment Construction

[0024] The processing method of the asymmetric staggered channel bipolar plate designed by the present invention is the same as that of the traditional staggered channel bipolar plate, and no special processing equipment is needed. This novel bipolar plate with staggered channels can be used in proton exchange membrane fuel cells of various sizes.

[0025] The inventors have theoretically analyzed the molar concentration distribution of oxygen (one of the reactants of the fuel cell) in the flow channel and the porous medium electrode. attached Figure 4 is the calculation result when the traditional symmetrical staggered flow channel is adopted, with Figure 5 When adopting the asymmetric staggered flow channel of the bipolar plate of the present invention (the inlet and outlet flow channel width ratio is 1.9), it can be seen that the region where the oxygen molar concentration in the electrode is less than 0.02 is smaller than that when using the traditional symmetric stagge...

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Abstract

This invention relates to proton exchange film fuel battery field, which is applied in space and submarine devices. The current proton exchange film fuel battery crossing flow channels adopt feeding flow channel and exit flow channel with same width symmetric design to lower the utility of the electrode catalyzer and the impact on the high intensity property. The invention comprises positioning bolt hole, one group of exit flow channel, one group of entrance flow channel, sealed groove and is characterize by the larger width than that of exit flow channel.`.

Description

technical field [0001] The utility model relates to an asymmetric staggered channel bipolar plate of a proton exchange membrane fuel cell, which belongs to the technical field of power supply. The application fields of proton exchange membrane fuel cells include aerospace, submarines, electric vehicles, distributed power stations, and mobile devices. It is a new generation of power generation equipment. Background technique [0002] A fuel cell is a device that continuously converts the chemical energy of fuel and oxidant directly into electrical energy through a chemical reaction. A dry cell or storage battery in the conventional sense is an energy storage device, but a fuel cell is fundamentally different. Fuel cell is an electrochemical power generation device. It has the characteristics of high energy conversion efficiency, low environmental pollution, low noise, and strong flexibility. It has attracted more and more attention from people and can be used in aerospace, d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0202H01M8/0258
CPCY02E60/50
Inventor 郭航马重芳
Owner BEIJING UNIV OF TECH
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