Leaf vein shaped fuel cell flow field plate

A fuel cell and flow field plate technology, applied to fuel cell parts, collectors/separators, etc., can solve the problems of difficult gas-liquid two-phase separation, uneven fluid distribution, large flow resistance, etc., and achieve uniform distribution , flow resistance is small, the effect of reducing flow resistance

Active Publication Date: 2009-06-17
ZHEJIANG UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0004] The present invention overcomes the disadvantages of the existing fuel cell flow field plate where the fuel is liquid, such as large flow resistance, uneven fluid distribution, and difficulty in gas-liquid two-phase separation, and provides a low flow resistance, which can produce gas in the reaction process by Shortest Path Fast Exhaust Fuel Cell Flow Field Plate

Method used

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  • Leaf vein shaped fuel cell flow field plate
  • Leaf vein shaped fuel cell flow field plate
  • Leaf vein shaped fuel cell flow field plate

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Embodiment Construction

[0018] With reference to accompanying drawing, further illustrate the present invention:

[0019] The fuel cell flow field plate of the present invention comprises two overlapping flow field plates, the flow field plate has a substantially square flow field area, and a sealing gasket 6 is provided around the flow field area for The main vein 1 for the inflow of liquid extends along the diagonal of the square, the confluence vein 2 for the outflow of the liquid is parallel to the sides of the square and perpendicular to the outlet 3 of the liquid, and one end of each branch 4 is connected to the The main vein 111 is connected at 45 degrees and parallel to the side of the square, and the other end is connected with the confluent vein 2 at a vertical angle.

[0020] The width of each branch 4 is positively correlated with its length.

[0021] The branching positions of the branches 4 on both sides of the main vein 1 are staggered from each other.

[0022] The width of the main ...

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Abstract

A vein-shaped fuel cell flow field plate comprises two flow field plates mutually joined, wherein a approximately square flow field area is arranged on the flow field plate, a sealing gasket is arranged on the periphery of the flow field area, a main vein for liquid flowing in extends along a diagonal line of the square, jointed veins for liquid flowing out are parallel to the edge of the square and are perpendicularly crossed at a liquid outlet, one end of each branch vein is connected with the main vein via a 45-degrees angle and is parallel to the edge of the square, and the other end is connected with the jointed veins via a vertical angle. The invention has the advantages that the flowing resistance of the liquid in the flow field plates can be smaller and more uniformly distributed, and gas generated during reaction can be exhausted via a shortest path.

Description

technical field [0001] The invention relates to a device for enhancing fluid mass transfer in a fuel cell, in particular to a fuel cell flow field plate. Background technique [0002] A fuel cell is a device that directly converts chemical energy in fuel into electrical energy. The battery flow field plate or pole plate is an important part of the fuel cell, which mainly plays the role of distributing fluid (fuel and oxidant), conducting electricity and supporting the battery structure. At present, there are mainly two types of flat fuel cell flow field plates, serpentine and parallel, with graphite as the main substrate. Therefore, the fuel cell flow field plate is relatively brittle, and the manufacturing cost is relatively high. At present, flat serpentine plates are used in various low-temperature fuel cells, while parallel plates are mainly used in fuel cells that use gas as fuel. [0003] In direct methanol fuel cells and direct borohydride fuel cells, due to the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/026
CPCY02E60/50
Inventor 王连邦颜景波杨珍珍马淳安
Owner ZHEJIANG UNIV OF TECH
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