Fuel cell stack

Abstract

The fuel cell pile includes end plate, current conduction board, multiple pole plates, multiple membrane electrodes, and seal washers. There is center hole on end plate, current conduction board, pole plates, and membrane electrodes respectively. There is connection orifice on end plate, and there is penetration hole on pole plate corresponding to the connection orifice. Current conduction board and membrane electrodes include holes corresponding to the said orifices and the penetration holes. Seal washers are arranged around the penetration holes on one face of pole plate as well as around center hole, and outer circumference on the other face. Bolts are separated from fuel channels in the invention. Reacting masses of cathode and anode can be diffused to any parts of cathode and anode. Thus, resultant of reaction and nonreactant can be eliminated in time. Advantages are: simple structure, wide adaptability, suitable to different devices by changing size and shape of fuel cell.

Description

Technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell stack. Background technique [0002] Fuel cell is a device that directly converts chemical energy into electrical energy. It has the characteristics of high efficiency, low pollution and low noise. The fuel cell can be just a single fuel cell or a fuel cell stack composed of multiple single fuel cells. [0003] A single fuel cell generally includes a proton exchange membrane 1, an anode 2, a cathode 3 and a guide plate 4, such as figure 1 Shown. [0004] The proton exchange membrane 1 is a semi-permeable membrane that is water-permeable and gas-impermeable. It has a proton conduction effect and can also prevent the oxidant and fuel from mixing and exploding. [0005] The anode 2 is a gas diffusion electrode, and its supporting material is generally composed of conductive carbon fiber or carbon cloth. Between the anode 2 and the proton exchange membrane 1 is a catalyst that catal...

AI Technical Summary

Problems solved by technology

[0017] The invention aims at the disadvantages of the prior art that the bolts in the fuel cell stack are easily corroded, the fuel is easily polluted, and there is a "dead zone" in the anode and cathode flow fields, and provides a kind of bolts that will not be corroded, and the fuel will not be easily polluted , there is no "dead zone" in the cathode and anode flow field, and the structure is simple, and the fuel cell stack is compactly assembled

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