Novel three-dimensional flow field bipolar plate with water-gas separation function and preparation method

Abstract

The invention relates to a novel three-dimensional flow field bipolar plate with a water-gas separation function, the novel three-dimensional flow field bipolar plate comprises a substrate, mounting positioning holes, a gas inlet and a gas outlet, an integrally formed three-dimensional flow field is arranged on the substrate, and the three-dimensional flow field comprises an external flow field arranged on the upper surface of the substrate and an internal flow field arranged below the external flow field; the internal flow field comprises a gas inlet channel communicated with the gas inlet and a snakelike flow field, the snakelike flow field comprises a gas flow channel and a ridge, the gas inlet channel is communicated with the gas flow channel, a plurality of reaction gas holes are formed in the position, corresponding to the gas flow channel, of the external flow field, drainage channels are arranged between the reaction gas holes, and the drainage channels are arranged around the reaction gas holes; and the drainage channel is communicated with the air outlet. The three-dimensional flow field structure realizes water-gas separation, improves the output performance of the battery and prolongs the service life of the battery. Selective laser melting is the most effective method for preparing the fuel cell bipolar plate of the three-dimensional complex refined flow field, a flow channel in any complex shape can be prepared, and the process is simple and high in reliability.

Description

technical field [0001] The invention relates to a fuel cell bipolar plate, in particular to a novel three-dimensional flow field bipolar plate with water-gas separation function and a preparation method. Background technique [0002] A fuel cell is a power generation device that converts the chemical energy of fuel into electrical energy through electrochemical principles. It has the characteristics of cleanliness, high efficiency and continuous operation. There are many types of fuel cells. For underwater ships and aircraft, the most promising one is the proton exchange membrane fuel cell (PEMFC). PEMFC has the advantages of light weight, small size and high power density, which can expand the storage capacity and enhance the flexibility and combat effectiveness of submarines. In addition, the acoustic characteristics do not exceed those of diesel-electric propulsion, enabling ultra-quiet operation. These characteristics greatly improve the concealment of the ship and hav...

AI Technical Summary

Problems solved by technology

Therefore, in order to solve the problems of insufficient mass and heat transfer capacity and low current density of the traditional two-dimensional flow field, this patent proposes a three-dimensional closed flow field structure and preparation method to meet the needs of underwater ships and aircraft proton exchange membrane fuel cells. Require

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