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Tree-structured flow field proton exchange membrane fuel cell bipolar plate

A technology of proton exchange membrane and tree structure, which is applied in the direction of fuel cells, fuel cell parts, battery electrodes, etc., can solve the problems of overall battery performance disturbance, unstable battery performance, and low air flow rate, etc., to achieve favorable Effects of gas flow, improved current density distribution, and increased output

Inactive Publication Date: 2013-04-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the continuous operation of the battery, due to the large number of channels, the airflow velocity is generally not large, and the water is not easily discharged, and it accumulates under the ribs between the channels and at the edges of the channels, resulting in partial flooding of the electrodes.
In practical applications, it is also found that due to the large number of channels, the subtle differences in the flow and reaction of gases in each channel will disturb the overall performance of the battery, resulting in unstable battery performance.

Method used

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  • Tree-structured flow field proton exchange membrane fuel cell bipolar plate
  • Tree-structured flow field proton exchange membrane fuel cell bipolar plate
  • Tree-structured flow field proton exchange membrane fuel cell bipolar plate

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, a proton exchange membrane fuel cell bipolar plate with a tree structure flow field includes an anode plate 1, a cathode plate 3, and a support frame 2. The anode plate 1 and the cathode plate 3 are fixedly connected by the support frame 2, and the support frame 2 Located between the anode plate 1 and the cathode plate 3, the left side of the anode plate 1 is provided with an anode flow field, the right side of the cathode plate 3 is provided with a cathode flow field, and the anode plate 1 and the cathode plate 3 are equipped with three The inlet and three outlets are respectively: fuel gas inlet 7, fuel gas outlet 7', oxidant inlet 8, oxidant outlet 8', cooling liquid inlet 6, cooling liquid outlet 6'; fuel gas inlet 7 on the anode plate 1 There is a section of gas inlet tree structure flow field 4, a section of gas outlet tree structure flow field 4' is provided at the fuel gas outlet 7' on the anode pl...

Embodiment 2

[0045] Such as Figure 5 as shown, Figure 5 It is a structural schematic diagram of the polar plate of embodiment 2 (the tree-like multi-branch flow field structure of the bipolar plate), and its structural form is basically the same as that of embodiment 1, except that: the gas inlet branch flow channel (relatively speaking, it It is the main flow channel that is branched again) and then set the gas inlet sub-branch flow channel (according to actual needs, the end of the branch flow channel can be divided into two sub-branches or three sub-branches, so that any number of branch flow channels can be generated. In the embodiment, three sub-branch flow channels are generated on the branch flow channel generated on the trunk), and the gas inlet sub-branch flow channel is connected with the flow channel of the parallel flow field; the gas outlet branch flow channel (relatively speaking, it is branched again) On the main flow channel of the gas outlet, a sub-branch flow channel f...

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Abstract

The invention relates to a proton exchange membrane fuel cell bipolar plate, in particular to a tree-structured flow field proton exchange membrane fuel cell bipolar plate. The bipolar plate comprises an anode plate, a cathode plate and a support frame, wherein the anode plate and the cathode plate are fixedly connected through the support frame which is positioned between the anode plate and thecathode plate; an anode flow field is arranged on the left side face of the anode plate; and a cathode flow field is arranged on the right side face of the cathode plate. The bipolar plate is characterized in that: the two end parts of the anode flow field and the cathode flow field are tree-structured flow fields and the middle parts are parallel flow fields. The bipolar plate can improve the property and stability of a fuel cell.

Description

technical field [0001] The invention relates to a bipolar plate of a proton exchange membrane fuel cell. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC for short) is a device that directly converts the chemical energy of hydrogen fuel into electrical energy through a chemical reaction. It has the characteristics of high power density, high energy conversion efficiency, fast startup at room temperature, little environmental pollution, and flexibility. Widely used in transportation, distributed power generation, aerospace and other fields. [0003] Bipolar plate is one of the main and important components of PEMFC and its cell stack. In the battery stack, each bipolar plate is related to two single cells, one side of which is the anode flow field of a single cell, and the other side is the cathode flow field of the adjacent single cell. The functions of the bipolar plate are as follows: (1) distribute the fuel and oxidant required for battery discha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M8/02H01M8/0258
CPCY02E60/50
Inventor 陈涛李昌平乔运乾谷云飞
Owner WUHAN UNIV OF TECH
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