Bipolar plate of fuel cell

Abstract

In a bipolar plate of a fuel cell including a plate having a certain area and thickness; inflow and outflow buffer grooves respectively formed at both sides of the plate so as to have a certain area and depth; plural channels for connecting the inflow buffer groove and the outflow buffer groove; plural buffer protrusions formed in the inflow and outflow buffer grooves so as to have a certain height; an inflow path formed on the plate so as to be connected to the inflow buffer groove; and an outflow path formed on the plate so as to be connected to the outflow buffer groove, it is possible to uniformize flux distribution and reduce flow resistance of fuel and air respectively flowing into a fuel electrode and an air electrode of a fuel cell.

Description

technical field [0001] The present invention relates to a fuel cell, and more particularly to a fuel cell bipolar plate capable of homogenizing flow distribution and reducing the flow resistance of fuel and air flowing into a fuel electrode (anode) and an air electrode (cathode) of the fuel cell, respectively. Background technique [0002] Fuel cells are generally environmentally friendly energy, and fuel cells have been developed to replace conventional fossil (fossil) energy. Such as figure 1 As shown, the fuel cell includes: a cell stack combined with at least one unit cell 11 in which an electrochemical reaction occurs; a fuel supply pipe 20 connected to the cell stack 10 to supply fuel; an air tube connected to the cell stack 10 to supply air supply pipe 30; and discharge pipes 40, 50 for discharging by-products of reacted fuel and air, respectively. The unit cell 11 includes a fuel electrode (anode) (not shown) in which fuel flows and an air electrode (cathode) (not ...

AI Technical Summary

Problems solved by technology

[0013] However, in the conventional first bipolar plate, because compared with the number of straight channels 136 formed in the hexagonal channels, for connecting the through holes 131, 132, 133, 134, the hexagonal channels 135 and the straight channels The quantity of the connecting channel 137 of the channel 136 is very small, so the flow distribution of the fluid flowing into the through holes 131, 132 is not good, and it is not suitable to adopt the traditional first bipolar plate when a large amount of fluid flows.

Meanwhile, in the conventional second bipolar plate, since the channels 145 of fuel and air are made in a curved shape, the flow resistance in the flow of fuel and air is increased, so the pressure loss for making the fluid flow is increased.

Images