Metal bipolar plate of miniature fuel battery

Abstract

The invention discloses a metal bipolar plate of a miniature fuel battery. The metal bipolar plate comprises an anode single-pole plate and a cathode single-pole plate having a same structure, the single-pole plate comprises an inlet end and an outlet end respectively positioned at two sides, and a flow path area positioned at a central section, the inlet end comprises a fuel inlet, a cooling medium inlet and an oxidizing agent inlet, the outlet end comprises a fuel outlet, a cooling medium outlet and an oxidizing agent outlet, a groove at a right side of the single-pole plate and a ridge forma right side channel of the single-pole plate, the right side channel of the anode single-pole plate is a fuel flow channel, the right side channel of the cathode single-pole plate is an oxidizing agent channel, the anode single-pole plate and the cathode single-pole plate are applied to form a cooling channel, and the oxidizing agent channel and the fuel flow channel are the snakelike flow channels. Three snakelike flow channels are arranged on the anode single-pole plate and the cathode single-pole plate, the gas conveying pressure of the bipolar plate is large, the drainage is good, the fuel concentration of the bipolar plate is uniform and consistent, the fuel utilization rate is increased, and the reaction efficiency of the fuel battery is high.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a metal bipolar plate of a small fuel cell. Background technique [0002] Proton exchange membrane fuel cell is a power generation device that uses hydrogen or methanol as fuel, oxygen or air as oxidant, and converts chemical energy stored in fuel and oxidant directly into electrical energy. Proton exchange membrane fuel cells have the advantages of high energy conversion efficiency, environmental friendliness, low temperature and fast start-up, etc., and have broad application prospects. The bipolar plate is one of the core components of the proton exchange membrane fuel cell. It has important functions such as supporting the membrane electrode assembly, uniformly distributing the reaction gas, collecting and conducting electricity, discharging the reaction water and dissipating heat. Metal materials have the advantages of good electrical and thermal conductivity, high mecha...

AI Technical Summary

Problems solved by technology

However, the serpentine structure grooves have a long stroke, and the large loss along the way leads to a relatively high pressure drop, which will bring a large burden to the air supply pump, and the structural characteristics of the parallel arrangement of the serpentine grooves lead to The concentration in the downstream area of ​​the tank is low, so the bipolar plate must be equipped with a new flow channel layout with simple structure, low flow resistance and good drainage to ensure uniform fuel concentration throughout the bipolar plate, thereby improving fuel utilization

Images