Fuel cell anode purging device and method

Abstract

The invention relates to a fuel cell anode purging device and method. The fuel cell anode purging device comprises a hydrogen supply module, an electric pile, a three-way valve I, a gas-water separator, a three-way valve II, a dryer, a hydrogen circulating pump and an electromagnetic valve, wherein a gas outlet of the hydrogen supply module is communicated to an electric pile anode inlet; an inlet a of the three-way valve I is communicated to an electric pile anode outlet, an outlet b is communicated to a dryer inlet, and an outlet c is communicated to a gas-water separator inlet; an inlet d of the three-way valve II is communicated to a gas outlet of the gas-water separator, an inlet e is communicated to an outlet of the dryer, an outlet f is communicated to a gas inlet of the hydrogen circulating pump, and a gas outlet of the hydrogen circulating pump is communicated to an anode inlet of the electric pile. Compared with the prior art, liquid water is separated and discharged by using the gas-water separator, vaporous water is adsorbed by using the dryer, residual liquid water and vaporous water on an anode are avoided, the service life of an electric pile is ensured, the flow direction of hydrogen is controlled through the two three-way valves, the occupied volume is small, integrated arrangement is facilitated, and popularization and use of a real vehicle are facilitated.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell anode purging device and method. Background technique [0002] Fuel cells, especially proton exchange membrane fuel cells, generate electricity and heat through the electrochemical reaction of hydrogen and oxygen. At the same time, the product is only water, and no other harmful gases are discharged. Cycle limited, its electrical energy conversion efficiency is greater than 50%. The advantages of fuel cells such as no pollutant emissions and high power conversion efficiency make proton exchange membrane fuel cell technology more and more used in passenger cars, light trucks, medium and heavy trucks and other vehicles. [0003] Proton exchange membrane fuel cells need appropriate moisture to convert electricity efficiently. Too little or excess moisture will have a negative impact on the fuel cell conversion efficiency. Therefore, the gas passing into the fuel cell...

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Problems solved by technology

However, there are two defects in this patent: 1. Too many solenoid valves and reactors are not conducive to the integrated layout of the fuel cell system, and it is difficult to promote the application of real vehicles; 2. The purging of this patent can only remove the liquid inside the stack Water, unable to remove gaseous water in stack gas mixture

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