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Active drainage flow field for bipolar plate of proton exchange membrane fuel cell

A technology of proton exchange membranes and fuel cells, which is applied to fuel cell parts, fuel cells, battery electrodes, etc., can solve problems such as liquid water retention, uneven gas concentration distribution, and large pressure drop in serpentine flow fields. Improves retention, improves performance and stability, and reduces uneven pressure distribution

Active Publication Date: 2016-01-13
ZHEJIANG UNIV OF TECH
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Problems solved by technology

However, in a large-area flow field, the pressure drop of the serpentine flow field is large, and the gas concentration distribution is uneven
The design of the interdigitated flow field promotes the forced convection of the reaction gas in the diffusion layer, but the phenomenon of liquid water stagnation at the end of the inlet channel and the beginning of the outlet channel due to insufficient pressure drop
[0006] The traditional flow field does not completely solve the stagnation of liquid water in the flow channel

Method used

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  • Active drainage flow field for bipolar plate of proton exchange membrane fuel cell
  • Active drainage flow field for bipolar plate of proton exchange membrane fuel cell
  • Active drainage flow field for bipolar plate of proton exchange membrane fuel cell

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Embodiment Construction

[0023] The flow field of an active drainage proton exchange membrane fuel cell bipolar plate implemented in this case includes a flow field body, and the flow field body includes a positive plate 1, a negative plate 2 and a support frame 3, and the two supports 3 The ends are respectively connected with the positive plate 1 and the negative plate 2, and the flow field body also includes an air intake channel and a drain channel 4, and the air intake channel includes a first air intake channel 5 and a second air intake channel 6, the The drain channel 4 is arranged between the first air intake channel 5 and the second air intake channel 6, the intake channel and the drain channel 4 are separated by the support frame 3, and the first air intake channel 5 is connected to the second air intake channel 6. The flow channel 6 is in an interdigitated structure, a diffusion layer 7 is provided between the negative electrode plate 2 and the support frame 3 , and the flow field body is ar...

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Abstract

The invention relates to an active drainage flow field for a bipolar plate of a proton exchange membrane fuel cell. The flow field is in a form of a rectangle, a first air inlet runner and a second air inlet runner are of interdigitated structures and arranged at the two sides, and a drainage runner is of a snakelike structure, is arranged between the first air inlet runner and the second air inlet runner, serves a reaction gas outlet runner and also serves as an active drainage runner. With the design of the active drainage runner, the defect of easiness in water logging of the traditional interdigitated structure can be overcome, thus, the effective reaction area is increased, and the performance and the stability of the cell are improved.

Description

technical field [0001] The invention relates to a flow field of a proton exchange membrane fuel cell bipolar plate, in particular to a flow field of an actively draining proton exchange membrane fuel cell bipolar plate. Background technique [0002] Proton exchange membrane fuel cell (ProtonExchangeMembraneFuelCell, PEMFC) has considerable market application prospects because of its high energy conversion rate, no pollution, fast start-up and other advantages. Compared with a heat engine, the chemical energy of a fuel cell is directly converted into electrical energy without the need for an initial conversion into heat. Therefore, the conversion is not limited by the Carnot cycle, and theoretically a high conversion efficiency of 90% can be achieved. [0003] The bipolar plate, also known as the collector plate, is an important part of the fuel cell. It needs to meet the following requirements: (1) to realize the electrical connection between the batteries; (2) to eliminate...

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Application Information

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IPC IPC(8): H01M8/0258H01M4/86
CPCH01M4/86H01M8/0202H01M8/0258Y02E60/50
Inventor 鲁聪达吴化平吴明格文东辉
Owner ZHEJIANG UNIV OF TECH
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