Anode pulse drainage system for proton exchange membrane fuel cell and working method thereof

Abstract

The invention discloses an anode pulse drainage system for proton exchange membrane fuel cell and a working method thereof. The system comprises a hydrogen storage tank, a first-stage reducing valve, a second-stage reducing valve, an air inlet electromagnetic valve, a fuel cell pile, a tail exhaust electromagnetic valve and an auxiliary electromagnetic valve, wherein the auxiliary electromagnetic valve is connected in parallel with the second-stage reducing valve; and hydrogen passes through the second-stage reducing valve and the auxiliary electromagnetic valve, is combined and enters the air inlet electromagnetic valve, the fuel cell pile and the tail exhaust electromagnetic valve in turn so as to exhaust tail gas to the outside. The tail exhaust electromagnetic valve and the auxiliary electromagnetic valve are used together, so that the air flow of auxiliary inflow air is accordant with that of tail exhaust air, the pressure or flow of fuel gas entering the pile is controlled accurately and accurate adjustment of the utilization ratio of fuel gas is realized by accurately controlling the pulse exhaust frequency of the tail exhaust electromagnetic valve. The system is simple, safe and reliable and has low cost and high adaptability.

Description

technical field [0001] The invention relates to the manufacturing technology of the proton exchange membrane fuel cell, in particular to an anode pulse drainage system of the proton exchange membrane fuel cell and its working method. Background technique [0002] Proton exchange membrane fuel cell is an efficient and environment-friendly power generation device, which directly converts the chemical energy stored in fuel and oxidant into electrical energy, and its working temperature is generally lower than 100°C. for liquid water. The generated water can be discharged in two ways, one is gaseous, if the relative humidity of the reaction gas is less than 1, that is, when the partial pressure of water vapor in the reaction gas does not reach the partial pressure of water vapor at the corresponding battery operating temperature, the water can be vaporized and discharged with the battery The exhaust gas leaves the battery; another way is liquid drainage. At this time, the relat...

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Problems solved by technology

This method is relatively simple to control, but at the moment of pulse discharge, if the control target is pressure control, the hydrogen flow into the reactor will have a peak value at this time, because the flow fluctuation range is large, the pressure is not stably controlled, and there will be fluctuations to a certain extent; The control target is flow control, and the instantaneous pressure of pulse discharge will also fluctuate greatly

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