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Method for improving internal heat distribution consistency of water-cooled proton membrane fuel cell stack

A fuel cell stack, heat distribution technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as reducing the performance and life of the stack, affecting the operation of the stack, etc.

Pending Publication Date: 2021-04-20
安徽枡水新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

High-power stacks are generally composed of dozens or even hundreds of membrane electrodes. If there are obvious hot spots inside the stack, it will greatly affect the operation of the stack, thereby reducing the performance and life of the stack.

Method used

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  • Method for improving internal heat distribution consistency of water-cooled proton membrane fuel cell stack

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Embodiment

[0024] The embodiment is to arrange the cooling water and the air flow field in countercurrent, so as to improve the uniformity of heat distribution inside the electric stack. The flow field arrangement of embodiment is as figure 1 As shown, the air flow field and the cooling water flow field are arranged countercurrently, the air inlet and the cooling water outlet are on the same side, and the air outlet and the cooling water inlet are on the other side. The flow field structure of hydrogen is the same as that of air, but the direction of flow is opposite, that is, the flow fields of each other are arranged countercurrently. Under the same test operating conditions, the stack temperature distribution was compared between the embodiment and the three flow field arrangements of Comparative Examples 1 and 2. The test operating conditions are shown in Table 1 below. The results of embodiment and comparative example 1 and comparative example 2 are as figure 2 and image 3 show...

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Abstract

The invention discloses a method for improving internal heat distribution consistency of a water-cooled proton membrane fuel cell stack. The method comprises an air flow channel, a cooling water flow channel and a hydrogen flow channel, the air flow channel and the cooling water flow channel are both serpentine structures, cooling water and an air flow field are arranged in a countercurrent mode, the hydrogen flow channel is the serpentine structure, and the hydrogen and the air flow field are arranged in the countercurrent manner. According to the method, the temperature difference between different membrane electrodes in the stack is minimum, and meanwhile, the temperature uniformity in the membrane electrode surface is the best, which means that in-plane local hot spots are fewer, the temperature consistency of the stack is the best, and a expected service life is longer. Therefore, the consistency of heat distribution in the water-cooled proton membrane fuel cell stack can be improved through countercurrent arrangement of the the air and the cooling water flow field, and the service life of the stack is prolonged.

Description

technical field [0001] The invention relates to the technical field of hydrogen fuel cells, in particular to a method for improving the consistency of heat distribution inside a water-cooled proton membrane fuel cell stack. Background technique [0002] The consistency of heat distribution inside the water-cooled PEMFC stack is crucial to the performance and life of the stack, especially for high-power stacks. High-power stacks are generally composed of dozens or even hundreds of membrane electrodes. If there are obvious hot spots inside the stack, the operation of the stack will be greatly affected, thereby reducing the performance and life of the stack. By optimizing the arrangement between the air flow field and the cooling water flow field, the consistency of heat distribution inside the stack can be effectively improved, thereby effectively ensuring high-efficiency and long-life operation of the stack. Contents of the invention [0003] The present invention aims to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04029H01M8/04089H01M8/0263H01M8/0267
CPCY02E60/50
Inventor 林晨王新磊
Owner 安徽枡水新能源科技有限公司
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