Monocell and proton-exchange membrane fuel cell stack structure of interdigital flow field

Abstract

The invention discloses an interdigital cathode flow field plate. Two parallel cross-channel A and cross-channel B, and a hollow slot are formed in one side of a cathode flow field plate, and are separated respectively through cathode channel shoulders; and a cathode flow field plate air inlet communicated with the cross-channel A, a cathode flow field plate air inlet B communicated with the cross-channel B, a cathode flow field plate hydrogen inlet and a cathode flow field plate hydrogen outlet are formed in the cathode flow field plate. The invention further discloses a monocell structure ofan interdigital flow field and a proton-exchange membrane fuel cell stack structure of the interdigital flow field. The interdigital flow field has the beneficial effects that the parallel cross-channels and hollow slot are formed in the cathode flow field plate of the monocell, so that the reacting gas on the cathode side passes through the air inlet in the cathode flow field plate, enters the parallel cross-channels and enters a membrane electrode to react, remained air and water in the reacting process pass through the joint between the cathode channel shoulder and membrane electrode to enter the hollow slot in a forced convection mode, and are discharged outside the fuel cell through grooves.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a single cell with a crossed flow field and a proton exchange membrane fuel cell stack structure. Background technique [0002] The proton exchange membrane fuel cell is an electrochemical power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy, and the final main reaction product is only water. In today's increasingly tense environment due to environmental pollution and energy, fuel cells are expected to become an alternative energy source for fossil fuels due to their environmental friendliness and high energy conversion efficiency, and are increasingly valued by governments around the world. [0003] Proton exchange membrane fuel cell is one of the most widely used and most studied fuel cell types. In the actual use process, multiple single cells are stacked together in series, and finally the internal structures are...

AI Technical Summary

Problems solved by technology

During operation, the oxidation-reduction reaction inside the fuel cell will generate a large amount of heat and reaction product water. The water heat management technology directly affects the performance and life of the fuel cell, especially for the operation of large fuel cell stacks. Water heat management Improper use often leads to a significant decline in battery performance or even a breakdown of the entire battery system

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