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Graphite bipolar plate flow field transition region gas distribution structure

A gas distribution and transition zone technology, applied in electrical components, fuel cells, electrochemical generators, etc., can solve problems affecting the overall gas distribution

Pending Publication Date: 2020-06-19
ZHEJIANG UNION SKY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The flow field transition area of ​​the graphite bipolar plate of the proton membrane fuel cell on the market is mainly dot matrix, adding guide strips, no transition area, etc., but for a large number of flow channels, when the width of the inlet and outlet pores is smaller than the width of the parallel flow channel, increase the guide Flow strips are a common solution to improve the uniformity of gas distribution. The current flow strips are all single-layer structures, and a slight modification of any flow strip can affect the overall gas distribution.

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  • Graphite bipolar plate flow field transition region gas distribution structure
  • Graphite bipolar plate flow field transition region gas distribution structure

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0021] Such as figure 1 As shown, the gas distribution structure of the graphite bipolar plate flow field transition zone includes a graphite bipolar plate 1, and the graphite bipolar plate 1 is provided with an inlet and outlet 6, a flow field transition zone 4, a working flow field 5, and a flow field transition zone 4 A gas guide strip 3 for guiding gas in layers is arranged inside. The flow field transition zone 4 includes a gas distribution zone in the flow field at the front end of the graphite bipolar plate 1 and a gas concentration zone in the flow field at the rear end. The gas guide strip 3 is a three-layer graded guide strip, including three first-layer gas guide strips 301, six second-layer gas guide strips 302, and 20 third-layer gas guide strips 303, each The layer guide bar divides the block formed by the flow guide of the previous l...

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Abstract

The invention discloses a graphite bipolar plate flow field transition region gas distribution structure, and belongs to the technical field of fuel cells. The graphite bipolar plate is provided witha gas inlet / outlet, a flow field transition area and a working flow field, and gas guide strips for guiding gas in a layered manner are arranged in the flow field transition area. According to the gasdistribution structure for the flow field transition region of the graphite bipolar plate, multiple layers of flow guide strips are matched with supporting points to assist flow guide in the flow field transition region, so that working gas entering a working flow field is more uniform, and the performance of a fuel cell is improved; and meanwhile, the thermal control capability of the fuel cellis greatly improved, and a guarantee is provided for the safety of the fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a gas distribution structure in a flow field transition zone of a graphite bipolar plate. Background technique [0002] At present, the storage battery industry, such as lithium batteries, lead-acid, nickel-metal hydride, and nickel-cadmium batteries, has relatively large hidden dangers such as environmental protection and safety. Today, with the development of science and technology, it is difficult to meet the requirements of green energy. It is urgent to develop new alternative products. up. A fuel cell is a power generation device that directly converts the chemical energy in fuel and oxygen into electrical energy by means of an electrochemical reaction without combustion under isothermal conditions. It is considered to be the ultimate solution to the energy and environmental crisis. [0003] Due to its excellent low temperature and environmental protection properties, t...

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Application Information

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IPC IPC(8): H01M8/0263H01M8/0271
CPCH01M8/0263H01M8/0271Y02E60/50
Inventor 茅开强万书径周罡周凤满
Owner ZHEJIANG UNION SKY TECH CO LTD
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