Fuel battery bipolar plate

A fuel cell and bipolar plate technology, applied in the direction of fuel cells, battery electrodes, circuits, etc., can solve the problems of gas turbulence, increase the difficulty of bipolar plate 20 and related costs, reduce the efficiency of fuel cells, etc., to prevent water droplets Effects of blocking, simplified structure, and low manufacturing cost

Inactive Publication Date: 2003-03-26
ASIA PACIFIC FUEL CELL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this existing method, the gas channel must be made into a single extended meandering and very thin channel, which increases the difficulty and related costs of manufacturing the bipolar plate 20
In addition,

Method used

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  • Fuel battery bipolar plate
  • Fuel battery bipolar plate
  • Fuel battery bipolar plate

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Embodiment Construction

[0033] The bipolar plate of the fuel cell of the present invention is mainly aimed at the bipolar plate of the proton exchange membrane fuel cell, whether the bipolar plate 20 is shown in FIG. 3 or Image 6 In any shape, there are a plurality of grooved gas channels 22 extending substantially parallel to each other. Each gas channel 22 defines a cross-sectional area between its wall surface and the gas diffusion layer 14 , and each has an opening 26 . In a preferred embodiment of the present invention, as shown in Figure 7, the wall surface of the bipolar plate 20 can be extended inwardly near the opening 26, and a protrusion 28 is set to reduce the cross-sectional area, according to the principle of fluid mechanics , the reduction of the cross-sectional area of ​​the gas channel 22 can increase the pressure difference (ΔP) on both sides of the gas channel. Therefore, the present invention can reduce the flow area of ​​the gas channel 22 in a way that greatly simplifies the man...

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Abstract

There are multiple parallel-extended grooves on the bipolar plate. The wall surfaces of each groove define one sectional area possessing the opening. The fittings utilized to reduce the said sectional area are set up at near the openings in order to increase the pressure difference between entries and exits of the gas passages so as to prevent the jam-up of the gas passages in the bipolar plate from water drops. Thus, the high efficiency operation of the fuel battery can be maintained.

Description

technical field [0001] The present invention relates to a bipolar plate of a fuel cell, in particular to a bipolar plate with improved water management effect, especially a bipolar plate applied in a proton exchange membrane fuel cell (proton exchange membrane fuel cell) with Bipolar plates for optimum water treatment efficacy. Background technique [0002] With the progress of human civilization, the consumption of traditional energy such as coal, oil and natural gas continues to rise, causing serious pollution of the earth, leading to the deterioration of the environment such as greenhouse effect and acid rain. Human beings have clearly realized and realized that the stock of natural energy is limited, if it continues to be abused, it will be exhausted in the near future. Therefore, the world's advanced countries have recently been devoting themselves to research and development of new alternative energy sources, and fuel cells (fuel cells) are one of the important option...

Claims

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Application Information

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IPC IPC(8): H01M8/0247H01M8/0254
CPCH01M8/0247Y02E60/50H01M8/0254
Inventor 杨源生
Owner ASIA PACIFIC FUEL CELL TECH
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