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Novel coupled proton exchange membrane fuel cell bipolar plate with wave-shaped structure and under-ridge flow channel

A fuel cell and bipolar plate technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of different material transport characteristics, achieve the effect of improving shunt effect, increasing the concentration of reactants, and improving material transport

Active Publication Date: 2021-10-29
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, increasing the block and corrugated flow channel structure only makes more gas enter the diffusion layer from the flow channel, and the material transport characteristics in the diffusion layer under the channel and in the diffusion layer under the ridge are different.

Method used

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  • Novel coupled proton exchange membrane fuel cell bipolar plate with wave-shaped structure and under-ridge flow channel
  • Novel coupled proton exchange membrane fuel cell bipolar plate with wave-shaped structure and under-ridge flow channel
  • Novel coupled proton exchange membrane fuel cell bipolar plate with wave-shaped structure and under-ridge flow channel

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Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 , image 3 Shown:

[0023] The present invention includes: periodic corrugated structure 1, under-ridge structure 2, inlet and outlet 3, gas dispersion column 4, bipolar plate body 5, diffusion groove 6; bipolar plate body 5 is provided with diffusion groove 6; both ends of the diffusion groove The inlet and outlet 3 are provided; the gas dispersion column 4 is located inside the inlet and outlet 3, a plurality of rows of periodic corrugated structures 1 are arranged in parallel from one end to the other end of the diffusion groove 6, and the sub-ridge structure 2 is located in any two rows of periodic corrugated structures 1 between.

[0024] Such as Figure 4 As shown, the periodic corrugated structure 1 is a long strip surface with multiple repeated wave structures, the length of the periodic corrugated structure 1 is 1mm-5mm, the width is 0.8mm, and the height of the flow channel is 0.1mm-0.8mm , the number of waves is 4-18; the periodic corruga...

Embodiment 2

[0031] When the proton exchange membrane fuel cell is in operation, the gas enters the flow channel through the inlet. First, it enters the diffusion area, which contains many gas dispersion column barriers, and the gas can evenly flow to the downstream channel area after passing through this area. In the channel region, the undulating wave structure of the periodic packing structure can generate a velocity component perpendicular to the direction of the channel, resulting in forced enhancement of the material exchange between the channel and the diffusion layer below the channel. Secondly, the channel under the ridge between the channels can also enhance the material exchange between the diffusion layer under the ridge and the diffusion layer under the channel.

[0032] Such as figure 2 As shown, the current density of the new flow channel is increased by 4% under the voltage of 0.4V, which effectively alleviates the concentration polarization loss under high current densit...

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Abstract

The invention discloses a novel coupled proton exchange membrane fuel cell bipolar plate with a wave-shaped structure and an under-ridge flow channel. The novel coupled proton exchange membrane fuel cell bipolar plate comprises periodic wave-shaped structures, under-ridge structures, an inlet / outlet, gas dispersion columns, a bipolar plate body and a diffusion groove; the diffusion groove is formed in the bipolar plate body; the inlet / outlet are formed in two ends of the diffusion groove; the gas dispersion columns are located on the inner side of the inlet / outlet, a plurality of rows of periodic corrugated structures are arranged in the diffusion groove from the gas dispersion column at one end to the gas dispersion column at the other end in parallel, and an under-ridge structure is arranged between any two rows of periodic corrugated structures. According to the invention, the shunt effect of the parallel flow field can be obviously improved, and the material transmission in the proton exchange membrane fuel cell can be improved. Compared with a traditional parallel flow channel, the concentration of reactants under the ridge is obviously increased, the concentration of products is obviously reduced, and the distribution of substances, temperature and current density is more uniform. Concentration polarization is effectively reduced, and the overall performance of the proton exchange membrane fuel cell is improved.

Description

technical field [0001] The invention relates to the field of proton exchange membrane fuel cells, in particular to a novel bipolar plate with a corrugated structure and a flow channel coupled with a proton exchange membrane fuel cell under a ridge. Background technique [0002] In the flow field structure of the proton exchange membrane fuel cell, there are mainly the structure of the overall form of the flow field and the method of reducing the volume of the flow channel by increasing the resistance block and the structure of the corrugated flow channel structure. [0003] Among them, for the structure of the overall form of the flow field, there are mainly serpentine, interdigitated, and parallel flow fields. New flow fields such as serpentine and interdigitated can promote material transport in proton exchange membrane fuel cells, but their main disadvantages are large pressure drop and complicated processing. The parallel flow field has a small pressure drop and is easy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0254H01M8/0258
CPCH01M8/0254H01M8/0258Y02E60/50
Inventor 王鸿雨腾飞王国栋蒋磊孙俊才
Owner DALIAN MARITIME UNIVERSITY
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