Flow channel for proton exchange membrane fuel cell

Abstract

The invention provides a flow channel for a proton exchange membrane fuel cell. The flow channel comprises a cathode flow channel arranged on a bipolar plate, wherein the cathode flow channel comprises an inlet flow channel with an inlet, an outlet flow channel with an outlet and at least one branch flow channel; the inlet of each branch flow channel communicates with the inlet flow channel and the outlet of each branch flow channel communicates with the outlet flow channel; and blocks are arranged in the at least one branch flow channel at intervals, so that the sectional area of the branch flow channels on the corresponding blocks is reduced. The flow rate of a gas when passing through the flow channel is increased through arranging the blocks in the gas flow direction, and the gas is more easily transferred into a diffusion layer, so that the gas utilization ratio is greatly improved and the overall level of the cell is improved.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a proton exchange membrane fuel cell flow channel. Background technique [0002] Proton exchange membrane fuel cell (PEMFC), as a new type of energy processing method, has become a hot spot in the field of energy research due to its low operating temperature, no pollution, no corrosion, high specific power, and rapid start-up. The research investment on this technology has been increasing all the time, and some key progress has been made. The design and processing of bipolar plate runners have a great influence on the performance, efficiency and cost of PEMFC. Proper flow channel design can increase battery performance by about 50%, thus ensuring better performance and stability of the fuel cell. [0003] At present, a typical proton exchange membrane fuel cell straight channel is as follows: figure 1 As shown, most of the reaction gas in the flow channel enters the elect...

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