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Bipolar plate flow field structure of proton exchange membrane fuel cell

A proton exchange membrane and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as low uniformity and poor fluid distribution, and achieve easy processing, consistent electrochemical reaction rates, and reduced flow resistance Effect

Active Publication Date: 2021-10-29
广东省武理工氢能产业技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The structure of the bipolar plate provided by the above-mentioned existing patent is simple and easy to process. Although the distribution lattice is provided, the distribution lattice is only arranged at both ends of the cooling flow field, and the main cooling area in the middle is still a parallel DC structure; thus , there are still problems of poor fluid distribution and low uniformity

Method used

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  • Bipolar plate flow field structure of proton exchange membrane fuel cell
  • Bipolar plate flow field structure of proton exchange membrane fuel cell
  • Bipolar plate flow field structure of proton exchange membrane fuel cell

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Experimental program
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Effect test

Embodiment 1

[0045] Such as figure 2 As shown, a proton exchange membrane fuel cell bipolar plate flow field structure includes: a plate body 1, an air inlet 2, an air outlet, a hydrogen inlet 4, a hydrogen outlet, and a coolant inlet 6 arranged on the plate body 1 , the cooling liquid outlet, and the electrochemical reaction active area 8, corresponding to the electrochemical reaction active area 8, a flow field structure 9-1 is provided; the flow field structure 9-1 adopts a circular staggered lattice structure.

[0046] Wherein, the circular staggered lattice structure located at both ends of the electrochemical reaction active region 8 adopts a gradually changing lattice spacing, the closer to the side of the inlet or outlet, the larger the lattice spacing, and the closer to the plate body 1 On one side of the center, the pitch of the dot matrix is ​​smaller.

[0047] In this embodiment, the gradual change of the pitch of the dot matrix includes not only the gradual change of the hor...

Embodiment 2

[0052] Such as image 3 As shown, a proton exchange membrane fuel cell bipolar plate flow field structure includes: a plate body 1, an air inlet 2, an air outlet, a hydrogen inlet 4, a hydrogen outlet, and a coolant inlet 6 arranged on the plate body 1 , the cooling liquid outlet, and the electrochemical reaction active area 8, a flow field structure 9-2 is provided corresponding to the electrochemical reaction active area 8; the flow field structure 9-2 adopts a rectangular staggered lattice structure.

[0053] Wherein, the rectangular staggered lattice structure located at both ends of the electrochemical reaction active area 8 adopts a gradually changing lattice spacing, the closer to the side of the inlet or outlet, the larger the lattice spacing, and the closer to the center of the plate body 1 On one side, the smaller the lattice spacing.

[0054] In this embodiment, the gradual change of the pitch of the dot matrix includes not only the gradual change of the horizontal...

Embodiment 3

[0059] Such as Figure 4 As shown, a proton exchange membrane fuel cell bipolar plate flow field structure includes: a plate body 1, an air inlet 2, an air outlet, a hydrogen inlet 4, a hydrogen outlet, and a coolant inlet 6 arranged on the plate body 1 , the cooling liquid outlet, and the electrochemical reaction active area 8, a flow field structure 9-3 is provided corresponding to the electrochemical reaction active area 8; the flow field structure 9-3 adopts a drop-shaped staggered lattice structure.

[0060] Wherein, the drop-shaped staggered lattice structure located at both ends of the electrochemical reaction active region 8 adopts a gradually changing lattice spacing, the closer to the side of the inlet or outlet, the larger the lattice spacing, and the closer to the plate body 1 On one side of the center, the pitch of the dot matrix is ​​smaller.

[0061] In this embodiment, the gradual change of the pitch of the dot matrix includes not only the gradual change of th...

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Abstract

The invention discloses a bipolar plate flow field structure of a proton exchange membrane fuel cell, which has the main innovative design points that an electrochemical reaction active region of a bipolar plate adopts a smooth staggered dot matrix structure, so that the flow velocity of hydrogen, air and cooling liquid is uniformly distributed, the electrical property and reliability of a stack can be improved, and meanwhile, efficient heat dissipation is realized, and stable operation of the proton exchange membrane fuel cell is ensured. The staggered dot matrixes comprise circular dot matrixes, rectangular dot matrixes and special-shaped dot matrixes. The special-shaped dot matrix adopts a streamline design, so that the flow resistance is reduced to the greatest extent. The design of the staggered dot matrix structure is verified through computational fluid mechanics and statics simulation calculation and tests, and the optimal longitudinal spacing, transverse spacing and lattice shape are determined through optimization design.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a novel proton exchange membrane fuel cell bipolar plate flow field structure. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of fuel into electrical energy. Compared with traditional heat engines, it has the advantages of high operating efficiency, clean and pollution-free, and low noise. It is expected to solve the environmental pollution problem of energy systems. At present, fuel cells have been popularized and applied in the fields of automobiles, unmanned aerial vehicles, and stationary power generation, and have broad application prospects in the future. [0003] The stack is the core component of the fuel cell, which is composed of membrane electrodes, bipolar plates, current collector plates, end plates and other components. Among them, the bipolar plate is in direct contact with the membrane electrode, an...

Claims

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Application Information

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IPC IPC(8): H01M8/0258H01M8/0267H01M8/0265
CPCH01M8/0258H01M8/0267H01M8/0265Y02E60/50
Inventor 张锐明唐浩林隋邦杰黄亮龚聪文
Owner 广东省武理工氢能产业技术研究院