Ring fuel cell bipolar plate
A fuel cell and annular technology, which is applied to fuel cell components, collectors/separators, etc., can solve problems such as membrane electrodes being easily damaged, and achieve low production cost, reduced volume, and good hydrophilicity. sexual effect
Inactive Publication Date: 2014-12-03
WUHAN UNIV OF TECH
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Problems solved by technology
At present, most fuel cell bipolar plates use traditional parallel flow channels, serpentine flow channels, interdigitated flow channels, etc. The fuel cells using these types of flow channels are easily damaged under the impact of external forces, while the dots The dot-shaped flow channel just makes up for this shortcoming. Since the flow field of the dot-shaped flow channel is different from the flow field of the traditional flow channel, it is necessary to establish a new bipolar plate
Method used
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Embodiment Construction
[0029] The circular fuel bipolar plate of the present invention will be further described below with reference to the accompanying drawings.
[0030] Such as Figure 1A , 1B , 1C, and 1D, the hydrogen flow field plate 2 has three parts, the hydrogen flow field plate circular hole flow channel 23, the hydrogen flow field plate gas diffusion chamber 25, and the hydrogen flow field plate cooling flow channel 24, and the hydrogen gas inlet 21 is arranged on the ring On the inner side wall, the hydrogen gas outlet 22 is arranged on a plane close to the outer ring, and the two hydrogen gas outlets 22 are symmetrically distributed, the side wall of the outer ring is closed, and the side in contact with the membrane electrode 1 is uniformly provided with a hydrogen flow field plate circular hole flow channel 23, Hydrogen gas enters from the inlet 21 and diffuses in the gas diffusion chamber of the flow field plate, and enters the membrane electrode 1 through the circular hole channel ...
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The invention relates to a ring fuel cell bipolar plate which is formed by oppositely combining an air flow field plate with a hydrogen flow field plate. Both the air flow field plate and the hydrogen flow field plate are in ring forms, and respectively comprise three parts of a round hole runner, a gas diffusion cavity and a cooling runner, and the round hole runners of the air flow field plate and the hydrogen flow field plate, which are contacted with a membrane electrode, mutually correspond to each other. The cooling runners of the air flow field plate and the hydrogen flow field plate corresponding to each other to form a ring runner mutually. The bipolar plate is made of metal materials, and has better mechanical performance compared with a common graphite bipolar plate, is not easy to damage, is easy to process and is thin, so the size of an electric pile can be reduced; and moreover, the shear forces of the membrane electrodes of the adopted round hole runners are smaller compared with those of the conventional parallel runners, snakelike runners and interdigital runners, so the shock resistance of the electric pile can be improved.
Description
technical field [0001] The invention relates to a circular fuel cell bipolar plate. Background technique [0002] A fuel cell is an energy conversion device that directly converts the chemical energy of fuel and oxidant into electrical energy. Its monomer is composed of positive and negative electrodes and an electrolyte. It can continue to generate electricity. Fuel cells have outstanding advantages such as high energy conversion efficiency, high specific energy and specific power, low environmental pollution, low noise, strong reliability and adaptability, and the possibility of cogeneration of heat, electricity, and pure water. They can be used in aviation, aerospace, navigation, Automobiles, power stations, portable equipment power supply. In recent years, fuel cell technology has been highly valued by countries and major companies, and is considered to be the most promising clean energy conversion device in the 21st century. [0003] The bipolar plate is an important...
Claims
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IPC IPC(8): H01M8/02H01M8/026
CPCY02E60/50
Inventor 涂正凯陈奔潘牧
Owner WUHAN UNIV OF TECH