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Purging protection device for fuel cell

A protection device, fuel cell technology, applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problems of long time, single function, incomplete purging, etc., to achieve the effect of performance recovery and reduction of consumption

Active Publication Date: 2021-11-19
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In order to meet the above-mentioned fuel cell operation guarantee requirements, the external nitrogen purging and replacement method is generally adopted, and there are problems such as irregular purging process, incomplete purging, long time consumption, and single function.

Method used

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  • Purging protection device for fuel cell

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Embodiment Construction

[0017] The present invention is described in further detail as follows in conjunction with the accompanying drawings and embodiments.

[0018] Such as figure 1 As shown, the invention discloses a purging protection device for fuel cells, which includes a vacuum branch, a nitrogen purging branch and a nitrogen circulation branch.

[0019] The vacuum pumping branch includes gas outlet solenoid valve 2, main filter 3, steam-water separator 8, main mass flow meter 9 and flame arrester 12 connected in sequence, for evacuating hydrogen, and the gas outlet solenoid valve 2 reacts The gas inlet port is connected with the reaction gas outlet port of the proton exchange membrane fuel cell stack 1 through a connecting pipe, and the steam-water separator 8 is also connected with a drain solenoid valve 23 for draining water.

[0020] The nitrogen purge branch includes a sequentially connected nitrogen filter 13, a nitrogen pressure reducing valve 14, a nitrogen solenoid valve 15, a nitrog...

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Abstract

The invention discloses a purging protection device for a fuel cell. The device comprises an electromagnetic valve, a filter, a vacuum pump, a gas circulating pump, a steam-water separator, a mass flow meter, a high-frequency electromagnetic valve, a back pressure valve, a flame arrester, a pressure reducing valve, a mass flow controller, a check valve, a pressure sensor, a temperature sensor, a hydrogen concentration sensor, an oxygen concentration sensor and other main parts. The vacuum pump is used for rapidly extracting residual reaction gas and products. The device has the functions of nitrogen constant-flow continuous back pressure purging and constant-pressure pulse purging. Trace oxygen can be added to activate the anode side of the fuel cell while nitrogen is cyclically purged.

Description

technical field [0001] The invention belongs to the technical field of purging equipment, and in particular relates to a purging protection device for a fuel cell. Background technique [0002] Proton exchange membrane fuel cell is an advanced power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy, and is currently the most potential hydrogen energy application method. The power generation device has many advantages such as environmental friendliness, low vibration and noise, high energy density, high energy conversion efficiency, and flexible power combination. [0003] Before the proton exchange membrane fuel cell is started, it is generally necessary to replace the gas inside the fuel cell; after the shutdown, in order to quickly reduce the voltage of the fuel cell, it is generally necessary to drain the residual reaction gas and product water as soon as possible; After falling, a small amount of oxygen is properl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04119H01M8/04228H01M8/04303
CPCH01M8/04179H01M8/04303H01M8/04228H01M8/04164Y02E60/50
Inventor 王振雷刚何书默吴桐杨军
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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