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Bipolar plate, fuel cell unit, fuel cell and manufacturing method thereof

A fuel cell unit and bipolar plate technology, which is applied to fuel cells, fuel cell parts, electrical components, etc., can solve the problems of single design, discontinuity, and low fuel concentration of interdigitated bipolar plates, and achieve enhanced The effect of fuel diffusion capacity, improved power generation performance, and uniform distribution of intake air

Active Publication Date: 2020-08-18
浙江锋源氢能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current anode bipolar plates are mainly designed with parallel flow channels or parallel serpentine flow channels. The flow structure of this design leads to convection as the main transmission mode, and the diffusion and transmission ability of fuel to the catalytic layer is weak. The fuel in the catalytic layer low concentration
Due to the discontinuous characteristics of the flow channel, the interdigitated flow channel has better diffusion and transmission capacity than the parallel and serpentine flow channels; It is conducive to the discharge of the water generated by the cathode, which may easily cause the cathode to be flooded, affect the gas transmission of the cathode, and then affect the power generation performance of the battery; moreover, the design of the existing interdigitated bipolar plate is single, ignoring the influence of the distribution area on the uniformity of the flow field In addition, the cooling liquid side of the traditional interdigitated bipolar plate mostly adopts welding and sealing technology, which limits the development of fuel cell unit integration

Method used

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  • Bipolar plate, fuel cell unit, fuel cell and manufacturing method thereof
  • Bipolar plate, fuel cell unit, fuel cell and manufacturing method thereof
  • Bipolar plate, fuel cell unit, fuel cell and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0060] This embodiment provides a bipolar plate for use in a fuel cell, such as Figure 1 to Figure 7 As shown, the bipolar plate in this embodiment includes an anode plate and a cathode plate. Wherein, in this embodiment, the flow channels at the power generation area of ​​the anode plate are set as interdigitated flow channels 11 , and the flow channels at the power generation area of ​​the cathode plate are set as parallel flow channels 21 .

[0061] The bipolar plate provided in this embodiment can strengthen the fuel diffusion capacity of the anode gas side of the fuel cell and increase the fuel concentration in the catalytic layer in the membrane electrode by setting the flow channel at the power generation area of ​​the anode plate as an interdigitated flow channel 11 . , thereby improving the power generation performance of the fuel cell; at the same time, the flow channel at the power generation area of ​​the cathode plate is set as a parallel flow channel 21, so that...

Embodiment 2

[0064] This embodiment provides a bipolar plate, compared with the previous embodiment, such as Figure 1 to Figure 7 As shown, this embodiment is further designed as follows:

[0065] On the one hand, the anode plate in this embodiment is designed as follows: the anode plate includes an anode plate body 1 and a fuel distribution cover plate. The interdigitated flow channel 11 is located on the anode plate body 1 , and the anode plate body 1 is provided with a fuel inlet 101 , a fuel outlet 106 , an oxidant inlet 103 , and an oxidant outlet 104 . The fuel inlet 101 and the oxidant inlet 103 on the anode plate body 1 are located at one end of the anode plate body 1 , and the fuel outlet 106 and the oxidant outlet 104 are located at the other end of the anode plate body 1 . The interdigitated flow channel 11 is located at the middle position of the anode plate body 1 . Here, the fuel distribution cover plate includes a first fuel distribution cover plate 31 and a second fuel d...

Embodiment 3

[0078] This embodiment provides a bipolar plate, compared with the above-mentioned embodiments, such as Figure 1 to Figure 7 As shown, this embodiment is further designed as follows:

[0079] On the one hand, the anode plate is provided with a cooling liquid inlet 102 and a first cooling liquid distribution area 13; wherein, the first cooling liquid distribution area 13 is located between the cooling liquid inlet 102 and the interdigitated flow channel 11, for The cooling liquid flowing in from the cooling liquid inlet 102 is distributed into the cooling liquid flow field. (like Figure 7 shown in the coolant flow field 73 formed between the anode and cathode plates). Preferably, when the anode plate includes the anode plate body 1 and the fuel distribution cover plate, the cooling liquid inlet 102 and the first cooling liquid distribution area 13 are both arranged on the anode plate body 1 . Here, the cooling liquid inlet 102 is located on the end of the anode plate body ...

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Abstract

The invention relates to a bipolar plate, a fuel cell unit, a fuel cell and a manufacturing method thereof, and relates to the technical field of fuel cells. According to the main technical scheme, the bipolar plate comprises an anode plate and a cathode plate, wherein a flow channel at a power generation area of the anode plate is set as an interdigital flow channel; and the flow channels in thepower generation area of the cathode plate are set to be parallel flow channels. The anode plate comprises an anode plate body and a fuel distribution cover plate, and the cathode plate comprises a cathode plate body and an oxidant distribution cover plate. The fuel cell unit comprises a membrane electrode and the bipolar plate. The fuel cell comprises a plurality of the fuel cell units. The method is mainly used for improving the diffusion capacity of the fuel in the fuel cell to the catalyst layer, avoiding the flooding phenomenon of the cathode of the fuel cell, and realizing the uniform circulation of the fluid on the cooling liquid side and the gas side while enhancing the mass transfer.

Description

technical field [0001] The present invention relates to the technical field of fuel cells, in particular to a bipolar plate, a fuel cell unit, a fuel cell and a manufacturing method thereof. Background technique [0002] Proton exchange membrane fuel cell is a new type of energy conversion device for converting chemical energy in fuel into electrical output. Proton exchange membrane fuel cells have the advantages of high energy conversion efficiency, not limited by Carnot cycle, high operational reliability, low operating temperature, fast startup, simple structure, no noise, etc., and can be widely used in the transportation industry, mobile facility power supply, Distributed power generation and other fields. The proton exchange membrane fuel cell unit is composed of bipolar plates, membrane electrodes and seals, etc. A plurality of battery cells can be assembled in series to form a stack structure. [0003] The power generation performance and reliability of fuel cells ...

Claims

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Application Information

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IPC IPC(8): H01M8/0258H01M8/0265H01M8/0286H01M8/0276
CPCH01M8/0258H01M8/0265H01M8/0276H01M8/0286Y02E60/50Y02P70/50
Inventor 陈明袁蕴超沈润王海峰王利生
Owner 浙江锋源氢能科技有限公司
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