Metal bipolar plate flow field configuration with high distribution consistency

Abstract

The invention discloses a metal bipolar plate flow field configuration with high distribution consistency. The metal bipolar plate flow field configuration with high distribution consistency is characterized by being formed by a surface B of an anode plate and a surface B of a cathode plate through contacting, wherein the anode plate and the cathode plate comprise first fluid distribution areas, straight flow channel areas and second fluid distribution areas; combustion gas, an oxidizing agent and a cooling agent sequentially flow through the first fluid distribution areas, the straight flow channel areas and the second fluid distribution areas; fluid grooves and water passing channels in the straight flow channel areas are linear; an inlet direction and an outlet direction of the combustion gas are perpendicular to the fluid grooves of the straight flow channel areas; an inlet and an outlet of the combustion gas are formed on different sides of the anode plate; an inlet direction andan outlet direction of the cooling agent are perpendicular to the fluid grooves of the straight flow channel areas; an inlet and an outlet of the cooling agent are formed on different sides of the anode plate; the inlet direction of the combustion gas is opposite to the inlet direction of the cooling agent; an inlet direction and an outlet direction of the oxidizing agent are parallel to the fluidgrooves of the straight flow channel areas. The gas flow resistance can be effectively solved, and the fuel reaction efficiency is improved.

Description

technical field [0001] The invention belongs to the field of new energy, and relates to a bipolar plate in the field of fuel cell technology, in particular to a metal bipolar plate for a proton exchange membrane fuel cell, and in particular, the invention relates to a cathode and anode flow field plate of a metal bipolar plate Flow field configuration. Background technique [0002] Energy is an important material basis for the development of human society. With the development of society and the improvement of living standards, energy consumption has increased sharply, and environmental pollution has become increasingly serious. Proton Exchange Membrane Fuel Cells (PEMFC), as a kind of fuel cell, has been studied since the early 1960s and has made great progress in the past ten years. It has received more and more attention, especially in automobile power, mobile power and small power stations, etc. It has a wide range of application prospects. [0003] The proton exchange...

AI Technical Summary

Problems solved by technology

However, the flow field structure provided by this invention causes relatively large gas resistance, and when the fluid passes through the transition zone, it is easy to generate local turbulence when passing through the flow channel divided into two and then divided into four, which is not conducive to gas circulation.

[0008] Chinese patent application CN102969513A discloses a large-area metal bipolar plate for a vehicle fuel cell. This invention provides a rectangular large-area metal bipolar plate, and the cathode and anode plates in the invention use two identical The unipolar plate is connected, and the flow field plate adopts a broken line shape, and the gas diffuses from less flow channels to large area flow channels. This invention reduces the mold development cost, but the gas inlet and outlet area used in this invention is small, When the gas is transported from a small area to a large area reaction area, it is easy to form turbulent flow, and the gas resistance inside the flow field is relatively large, which is easy to cause damage to the proton exchange membrane, thereby affecting the stability of the fuel cell operation

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