Air-cooled proton exchange membrane fuel cell metal bipolar plate and fuel cell thereof

Abstract

The invention relates to an air-cooled proton exchange membrane fuel cell metal bipolar plate and a fuel cell thereof. The bipolar plate comprises a first metal plate and a second metal plate. The first metal plate and the second metal plate are each provided with a first metal frame, a fuel gas inlet and an oxidizing agent inlet which are formed in one side of the first metal frame, and a fuel gas outlet and an oxidizing agent outlet which are formed in the other side of the first metal frame, and the fuel gas inlet and the fuel gas outlet in the first metal plate are communicated with the first metal frame. The oxidizing agent inlet and the oxidizing agent outlet in the second metal plate communicate with the first metal frame, a gas flow channel is formed in the first metal frame and comprises first buffer flow channels arranged at the head end and the tail end of the gas flow channel correspondingly, and each first buffer flow channel comprises a plurality of flow dividing columns distributed at equal intervals; and a flow dividing groove is formed between every two adjacent flow dividing columns, and the end, away from the flow dividing columns, of each flow dividing groove inclines in the direction away from the first metal frame. The effect of improving the reaction rate of the fuel cell is possessed.

Description

technical field [0001] The application relates to the field of fuel cells, in particular to a metal bipolar plate of an air-cooled proton exchange membrane fuel cell and a fuel cell thereof. Background technique [0002] A fuel cell is a chemical device that converts the chemical energy of fuel into electrical energy. The main structural components of a fuel cell include a membrane electrode and a bipolar plate. The bipolar plate is an important part of the battery and plays the role of collecting current, gas distribution, water management, and heat management in the fuel cell. Metal bipolar plates can be used for fuel cell bipolar plates. Metal materials have the advantages of electrical conductivity, good thermal conductivity, high mechanical strength, easy thinning, and easy processing, and have become one of the materials for fuel cell bipolar plates. [0003] At present, the existing metal bipolar plates use stamping to process groove structures on titanium metal plat...

AI Technical Summary

Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that the fuel gas and oxidant gas stay in the linear flow field for a period of time that is not enough for the catalysts on the fuel gas and oxidant gas bipolar plates to completely react, which may cause the fuel gas and oxidant gas to disperse. The reaction rate is reduced, thereby reducing the efficiency of the entire fuel cell

Images