Bipolar plate with flow channel resistance adjusting function for fuel cell
A resistance adjustment and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as uneven gas distribution, local lack of air and water flooding, so as to improve operating efficiency, solve water flooding, and increase reaction gas concentration Effect
Pending Publication Date: 2022-07-08
BEIJING SINOHYTEC
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Problems solved by technology
[0002] At present, with the wide application of electric vehicles, various battery technologies have been widely developed, which brings about the innovation of battery technology. Fuel cells have been widely used because they can directly convert chemical energy into electrical energy. Later, it was found that during the start-up operation of the fuel cell, with the entry of hydrogen and air, gas distribution will occur at the inlet of the bipolar plate. Since the gas distribution in the channel closer to the gas inlet is more, this will lead to the gas inlet side gas distribution. Uneven distribution, resulting in local lack of air and flooding
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[0014] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
[0015] see figure 1 and figure 2 , a fuel cell bipolar plate with flow channel resistance adjustment, a plurality of flow channels are evenly arranged on the bipolar plate;
[0016] The flow channel is used to restrict the flow of hydrogen or air;
[0017] A flow field resistance increasing structure is arranged in the flow channel to balance the flow resistance of different flow channels.
[0018] During specific implementation, the flow field resistance increasing structure is a raised block.
[0019] During specific implementation, multiple flow field resistance increasing structures are arranged according to different flow resistance requirements of the flow channels, and multiple flow field resistance increasing structures are arranged at different positions of the flow channel according to the flow resistance values at different p...
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The invention discloses a fuel cell bipolar plate with runner resistance adjustment. A plurality of runners are uniformly arranged on the bipolar plate; the flow channel is used for restraining the flow of hydrogen or air; a flow field resistance increasing structure is arranged in the flow channel and used for balancing flow resistance of different flow channels. The flow field resistance increasing structure is a protruding block. The multiple flow field resistance increasing structures are arranged according to different flow channel requirements, and the multiple flow field resistance increasing structures are arranged at different positions of the flow channel according to flow resistance values at different positions of the flow channel. By controlling the flow resistance of the polar plate flow channels, the gas pressure in each flow channel is controlled, so that the balance of the gas pressure and gas flow in different flow channels is realized, the flowing speed of gas in different flow channels is controlled, and the distribution state of product water in the operation of the bipolar plate under the rated working condition of a fuel cell system is controlled. The flow rate and the flow velocity are reasonably adjusted to distribute and discharge generated product water, and the problem of water flooding of the fuel cell is effectively solved.
Description
technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a bipolar plate with flow channel resistance adjustment for fuel cells. Background technique [0002] At present, with the wide application of electric vehicles, various battery technologies have been widely developed, which has brought about the innovation of battery technology. Fuel cells have been widely used because they can directly convert chemical energy into electrical energy, but they are widely used in a large number of applications. Later, it was found that during the startup and operation of the fuel cell, with the entry of hydrogen and air, gas distribution will occur at the inlet of the bipolar plate. Since the closer to the gas inlet, the more gas is distributed, which will cause the gas on the gas inlet side to be distributed. The distribution is uneven, resulting in the phenomenon of water flooding due to partial air shortage. SUMMARY OF THE INVENTION [00...
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Login to View More IPC IPC(8): H01M8/0256
CPCH01M8/0256Y02E60/50
Inventor 张宇航李飞强徐云飞方川张国强
Owner BEIJING SINOHYTEC