Bipolar plate for squamous flow-diversion fuel cell containing capillary groove ridges

A fuel cell and bipolar plate technology, applied in the direction of fuel cells, fuel cell components, 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 moisture Effects of discharge efficiency, improvement of gas mass transfer performance, and improvement of water-carrying capacity

Active Publication Date: 2020-08-28
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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  • Bipolar plate for squamous flow-diversion fuel cell containing capillary groove ridges
  • Bipolar plate for squamous flow-diversion fuel cell containing capillary groove ridges
  • Bipolar plate for squamous flow-diversion fuel cell containing capillary groove ridges

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Embodiment 1

[0037] A method for preparing a bipolar plate for a fuel cell according to the present invention is provided, comprising the steps of:

[0038] Step 1. Use a graphite plate with a thickness of 1.5mm as the substrate;

[0039] Step 2. The flow field of the bipolar plate adopts parallel flow channel design, the width of the ridge of the flow channel is 0.6mm, the width of the flow channel groove is 0.8mm, and the depth of the flow channel groove is 0.6mm;

[0040] Step 3, the capillary groove design is as follows: ①The upper rectangular groove of the capillary groove is on the three surfaces of the runner ridge, the groove width is 0.05mm, the groove depth is 0.1mm, and the first rectangular groove is 0.4mm away from the top of the runner ridge;② The right-angled triangular groove at the lower part of the capillary groove ridge is on the two sides of the runner ridge, the lengths of the two right-angled sides of the right-angled triangle are 0.1mm and 0.05mm respectively, and th...

Embodiment 2

[0044] Step 1, using a graphite plate with a thickness of 1.5mm as the base material;

[0045] Step 2. The flow field of the bipolar plate adopts parallel flow channel design, the width of the ridge of the flow channel is 0.6mm, the width of the flow channel groove is 0.8mm, and the depth of the flow channel groove is 0.6mm;

[0046] Step 3. The design of the capillary ridge is as follows: ①The upper rectangular groove of the capillary ridge is on the three surfaces of the runner ridge, the groove width is 0.06mm, the groove depth is 0.15mm, and the first rectangular groove is 0.5mm away from the top of the runner ridge; ② The right-angled triangular grooves at the lower part of the capillary ridges are on the two sides of the runner ridges, the lengths of the two right-angled sides of the right-angled triangles are 0.15mm and 0.06mm respectively, and the groove depth is 0.2mm;

[0047] Step 4, the design of the squamous ridge is as follows: ①The length of the squamous ridge i...

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Abstract

The invention relates to a bipolar plate for a squamous flow-diversion fuel cell containing capillary groove ridges. A capillary groove is formed in a flow channel ridge of a double-ridge plate, the upper part is of a rectangular groove structure, and the lower part is of a right-angled triangular groove structure; squamous flow-diversion ridges are arranged in the flow channel grooves, and each squamous ridge is of a structure from low to high in the gas flowing direction. Moisture in a diffusion layer of the fuel cell is transmitted through the upper rectangular groove of the capillary groove; and the lower right-angled triangular groove can guide water into a main flow field of the bipolar plate, so that the drainage characteristic of the bipolar plate of the fuel cell is enhanced, thegas transmission characteristic in a membrane electrode diffusion layer of the fuel cell is improved in an auxiliary manner, and the power generation performance and the cold start performance of thefuel cell are improved. Through the squamous flow-diversion ridges, the gas obtains the flow velocity vertical to the membrane electrode, the gas mass transfer performance is enhanced, and the power generation performance of the fuel cell is improved.

Description

technical field [0001] The invention relates to the technical field of a three-dimensional flow field bipolar plate for a proton exchange membrane fuel cell, in particular to a bipolar plate for a scaly split-flow fuel cell containing capillary ridges. Background technique [0002] Environmentally friendly green renewable energy is the trend of international new energy development, and hydrogen energy, as a renewable energy source, can be obtained by inexhaustible wind / solar electrolysis of water, and then generated by hydrogen fuel cells. The by-product of energy is only water, so as to realize green closed-loop energy utilization. [0003] One of the ways to utilize hydrogen energy is fuel cells fueled by hydrogen. The application fields range from fixed power stations to mobile power sources. Among them, fuel cell vehicles as the driving power of electric vehicles are considered to be the ultimate substitutes for traditional gasoline vehicles. . Bipolar plates are one o...

Claims

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Application Information

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Patent Type & Authority Applications(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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