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A bipolar plate for a squamous split fuel cell with capillary ridges

A fuel cell and bipolar plate technology, applied in the direction of fuel cells, fuel cell parts, circuits, etc., can solve the problems of low water carrying capacity and water discharge efficiency of fuel cells, affecting the overall performance of fuel cells, etc., to achieve improved cooling Effects of starting performance, improving gas mass transfer performance, and improving drainage performance

Active Publication Date: 2021-07-27
清华大学山西清洁能源研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The moisture generated during the power generation process of the fuel cell can only be discharged out of the fuel cell through the flow channel groove. The drainage transmission and the reaction gas transmission share the same flow field channel, which makes the water carrying capacity and moisture discharge efficiency of the fuel cell relatively low, thus affecting The comprehensive performance of the fuel cell makes it necessary to further improve the power generation performance and cold start performance of the fuel cell

Method used

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  • A bipolar plate for a squamous split fuel cell with capillary ridges
  • A bipolar plate for a squamous split fuel cell with capillary ridges
  • A bipolar plate for a squamous split fuel cell with capillary ridges

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Effect test

Embodiment 1

[0037] A method of preparing a bipolar plate for the fuel cell of the present invention includes the following steps:

[0038] Step 1, using a graphite sheet having a thickness of 1.5 mm as a substrate;

[0039] Step 2, the bipolar plate flow field is designed with parallel flow channels, the flow path width is 0.6mm, the flow channel groove is 0.8mm, and the flow channel groove is 0.6mm;

[0040] Step 3, the capillary design is specifically as follows: 1 The upper rectangle groove of the capillary is on three sides of the flow path ridge, the groove width is 0.05mm, the groove depth is 0.1mm, and the first rectangular groove is 0.4mm from the top of the ridge; 2 The upper right angle triangular tank in the crates is on both sides of the flow path ridge, and the two right angle sides of the right angle triangle are 0.1 mm and 0.05 mm, respectively, and the groove is 0.3mm;

[0041] Step 4, the squamous ridge design is as follows: 1 Squam length is 1 mm, the width is 0.6mm, the hei...

Embodiment 2

[0044] Step 1, using a graphite sheet having a thickness of 1.5 mm as a substrate;

[0045] Step 2, the bipolar plate flow field is designed with parallel flow channels, the flow path width is 0.6mm, the flow channel groove is 0.8mm, and the flow channel groove is 0.6mm;

[0046] Step 3, the capillary ridge design is as follows: 1 The rectangular groove of the capillary spine is on three sides of the flow path ridge, the groove width is 0.06mm, the groove depth is 0.5mm away from the top of the ridge distance of the first rectangular groove; 2 Cartestrointegrade triangle tanks in the bottom of the ridges On the two sides of the flow path ridge, the two right angle sides of the right angle triangle are 0.15 mm and 0.06mm, respectively, the groove depth is 0.2mm;

[0047] Step 4, the squamous ridge design is as follows: 1 Squam length is 1.5mm, the width is 0.6mm, the height of the squamous ridge is 0.25mm, the height of the squamous ridge is 0.055mm, from low to high The slope is 0...

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Abstract

The invention relates to a bipolar plate for scaly split-flow fuel cells containing capillary groove ridges. The flow channel ridge of the double-ridged plate is provided with capillary grooves, the upper part is in a rectangular groove structure, and the lower part is in a right-angled triangular groove structure; A scaly shunt ridge is arranged in the groove, and each scaly ridge is in a low-to-high structure along the gas flow direction. The moisture in the fuel cell diffusion layer is transported through the upper rectangular groove of the capillary groove, while the lower right-angled triangular groove can introduce moisture into the main flow field of the bipolar plate, thereby enhancing the drainage characteristics of the fuel cell bipolar plate and assisting in improving the fuel cell membrane. Gas transport properties in electrode diffusion layers to improve fuel cell power generation performance and cold start performance. Through the scaly shunt ridge, the gas can obtain the flow velocity perpendicular to the membrane electrode, enhance the gas mass transfer performance, and improve the power generation performance of the fuel cell.

Description

Technical field [0001] The present invention relates to a three-dimensional flow field bipolar plate technology for a proton exchange membrane fuel cell, and in particular, a bipolar plate having a squamous shunt fuel cell containing capillary ridges. Background technique [0002] Environmentally friendly green renewable energy is the trend of international new energy development, while hydrogen can be used as a renewable energy, which can be obtained by taking any inexhaustible wind energy / solar electrolysis water, and then power generation through hydrogen fuel cells. Energy simultaneous by-products are only water, thereby achieving green closed-loop energy utilization. [0003] One of the modes of hydrogen can be used in a fuel cell that is fuel as a fuel, and the application field covers large to the fixed power station, small to mobile power, wherein the fuel cell vehicle for driving power supplies as an electric vehicle is considered a conventional gasoline vehicle. Ultim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/026H01M8/0265
CPCH01M8/026H01M8/0265Y02E60/50
Inventor 王树博谢晓峰
Owner 清华大学山西清洁能源研究院
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