CN100516803C - Vacuum leakage detector for flow guide plate of fuel cell - Google Patents

Vacuum leakage detector for flow guide plate of fuel cell Download PDF

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Publication number
CN100516803C
CN100516803C CNB2004100931067A CN200410093106A CN100516803C CN 100516803 C CN100516803 C CN 100516803C CN B2004100931067 A CNB2004100931067 A CN B2004100931067A CN 200410093106 A CN200410093106 A CN 200410093106A CN 100516803 C CN100516803 C CN 100516803C
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plate
guide plate
fuel cell
check
out console
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CN1789943A (en
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胡里清
夏雪均
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State Grid Corp of China SGCC
Shanghai Municipal Electric Power Co
Shanghai Shenli Technology Co Ltd
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Shanghai Shen Li High Tech Co Ltd
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Abstract

The invention discloses a vacuum leakage detector of fuel battery diversion plate, which comprises the following parts: upper board, moving board, bottom and guide post, wherein the moving board is set between the upper board and bottom, which is pierced by guide post to move up-and-down; the upper board contains vacuum gauge, rotary valve and upper detecting board; two ends of upper detecting board connect the vacuum gauge and rotary valve separately; the other end of rotary valve connects the peripheral vacuum pump; the lower detecting board is fixed in the middle of upper plane of moving board; the bottom contains cylinder and pneumatic switch; the top of cylinder piston rod is fixed on the lower plane of moving plate, which anchors the moving plate to move up-and-down.

Description

A kind of vacuum leak detector that is used for flow guide plate of fuel cell
Technical field
The present invention relates to a kind of checkout equipment, relate in particular to a kind of vacuum leak detector that is used for flow guide plate of fuel cell.
Background technology
Fuel cell is the device that a kind of chemical energy that produces can be with fuel and oxygenant generation electrochemical reaction the time is transformed into electric energy.The core component of this device is membrane electrode (Membrane Electrode Assembly, be called for short MEA), membrane electrode can be made up of by conductive porous property diffusion material (as carbon paper) with two that are clipped in the film two sides a PEM, is evenly distributed with the catalyzer (as metal platinum) of the caused electrochemical reaction of tiny dispersion on two boundary surfaces that PEM contacts with conductive material.Draw by external circuit with the electronics that conductive body will take place to produce in the electrochemical reaction process on the membrane electrode both sides, has just constituted current return.
Anode tap at membrane electrode, fuel can pass poriness diffusion material (as carbon paper) by infiltration, and in catalyst surface generation electrochemical reaction, loses electronics and form positive ion, positive ion can pass PEM by migration, arrives the other end one cathode terminal of membrane electrode.Cathode terminal at membrane electrode, the gas (as air) that contains oxygenant (as oxygen), pass poriness diffusion material (as carbon paper) by infiltration, and in catalyst surface generation electrochemical reaction, obtain electronics and form negative ion, this negative ion further combines with the positive ion of coming from the anode tap migration, forms reaction product.
Be fuel with hydrogen, be in the Proton Exchange Membrane Fuel Cells of oxygenant (or be oxygenant with the pure oxygen) with the air that contains oxygen, fuel hydrogen loses the catalytic electrochemical reaction of electronics in the anodic site, form hydrogen positive ion (proton), its electro-chemical reaction equations is:
H 2→2H ++2e
Oxygen obtains the catalytic electrochemical reaction of electronics in the cathodic area, form negative ion, and this negative ion further combines with the hydrogen positive ion of coming from the anode tap migration, forms reaction product water.Its electro-chemical reaction equations is:
1/2O 2+2H ++2e→H 2O
PEM in the fuel cell is except the proton that is used for taking place electrochemical reaction and migration exchange reaction and produces, its effect comprises that also air-flow that will contain fuel hydrogen and the air-flow that contains oxygenant (oxygen) separate, and they can not mixed mutually and produces the explosion type reaction.
In typical Proton Exchange Membrane Fuel Cells, membrane electrode generally is placed between the pole plate of two conductions, all offers diversion trench on the two-plate, therefore is called guide plate again.On the surface that diversion trench is opened in membrane electrode contacts, mill formation at quarter by die casting, punching press or machinery, its quantity is at one or more.Guide plate can be made by metal material, also can be made by graphite material.The effect of the diversion trench on the guide plate is anodic site or the cathodic area that fuel or oxygenant is imported the membrane electrode both sides respectively.In the structure of a Proton Exchange Membrane Fuel Cells monocell, only there are a membrane electrode and two guide plates, two guide plate branches are located at the membrane electrode both sides, a guide plate as anode fuel, another is as the guide plate of cathode oxidant.These two guide plates also are the mechanical support on membrane electrode both sides both as current collector plate.Diversion trench on the guide plate is the passage that fuel or oxygenant enter the male or female surface, also is the exhalant canal that the water that generates in the battery operation process is taken away.
In order to increase the power of Proton Exchange Membrane Fuel Cells, the composition electric battery that usually mode of two or more monocells by straight folded mode or tiling connected together, or be called battery pile.This electric battery tightens together by front end-plate, end plate and pull bar usually and becomes one.In electric battery, the two sides of the pole plate between two PEMs all is provided with diversion trench, is called bipolar plates.The wherein one side of bipolar plates is as the anode guide face of a membrane electrode, and another side is then as the cathode diversion face of another adjacent membranes electrode.1), the import and the flow-guiding channel of fuel and oxidant gas a typical electric battery also comprises usually:.Its effect is that fuel (as hydrogen, methyl alcohol or the hydrogen-rich gas that obtained after reforming by methyl alcohol, rock gas, gasoline) and oxygenant (mainly being oxygen or air) are distributed in the diversion trench of each anode, cathode plane equably; 2), the import and export and the flow-guiding channel of cooling fluid (as water).Its effect is that cooling fluid is distributed in the cooling duct in each electric battery equably, absorbs the reaction heat that produces in the fuel cell and takes it out of electric battery and dispel the heat; 3), the outlet of fuel and oxidant gas and flow-guiding channel.Its effect is that the unnecessary fuel gas and the oxygenant that do not participate in reaction are discharged, and will react the liquid state of generation or the water of gaseous state simultaneously and take out of.Above-mentioned fuel is imported and exported, oxygenant is imported and exported and the import and export of cooling fluid all are opened on the end plate of fuel cell group usually or be opened in respectively on two end plates.
Proton Exchange Membrane Fuel Cells can be used as the power system of delivery vehicles such as car, ship, can be made into portable, portable or fixed Blast Furnace Top Gas Recovery Turbine Unit (TRT) again.
Guide plate is the critical component of fuel cell, the quality of its quality is particularly important to whole fuel cell performance, guide plate is the water conservancy diversion field of fuel hydrogen, oxygenant air and cooling fluid, if mutual seepage takes place various fluids, then will reduce the power generation performance of fuel cell greatly, even blast, that is to say, guide plate is definitely the seepage phenomenon to be arranged, and therefore, whether seepage is that guide plate is carried out the important ring that quality is checked on to detect guide plate.In actual production, must carry out the whether quality testing of seepage to each piece guide plate, be rigid in checking up, therefore, must design a kind of device that can hunt leak to guide plate exactly again fast, to guarantee the quality of guide plate.At present, all be by the artificial visually examine to the detection of guide plate, waiting pinpoints the problems after the guide plate assembling changes again, and this brings very burden for assembling and production of fuel cell, and efficient is very low.
Summary of the invention
Purpose of the present invention is exactly for a kind of vacuum leak detector that is used for flow guide plate of fuel cell efficiently is provided.
Purpose of the present invention can be achieved through the following technical solutions: a kind of vacuum leak detector that is used for flow guide plate of fuel cell, it is characterized in that, comprise upper plate, movable plate, base plate, guide pillar, described movable plate is located between upper plate and the base plate and is run through by guide pillar and move up and down along it.
Described upper plate is provided with vacuum meter, rotary valve, goes up check-out console, and the described check-out console two ends of going up connect vacuum meter, rotary valve respectively, and the other end of described rotary valve connects the vacuum pump of peripheral hardware.
Following check-out console of last plane center fixed of described movable plate, this time check-out console is provided with a center pit, connect in the transparent vessel that a pipe to is equipped with water by this center pit, this transparent vessel upper end has two holes, insert for two tubes respectively, wherein an end of a pipe inserts in the water, and the other end leads directly to atmosphere, one end of another root pipe links to each other with the center pit of following check-out console, and the other end inserts the transparent vessel upper end.
Described base plate is provided with cylinder, pneumatic switch, and the piston rod part of described cylinder is fixed in the movable plate lower plane, and piston rod drive movable plate moves up and down thus.
Described guide pillar is provided with four, and the upper and lower part of these four guide pillars is fixed on upper plate, the base plate by nut respectively.
The described last plane of check-out console down is provided with one and the corresponding plane of the required surveyed area of guide plate rubber sealing ring.
The piston rod part of described cylinder is by the flange that is threaded, and in the movable plate lower plane, and piston rod drives movable plate and moves up and down this flange thus by bolt.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of vacuum leak detector that is used for flow guide plate of fuel cell mainly contains upper plate 1, base plate 2, and is middle for moving up and down plate 3, runs through movable plate 3 by four guide pillars 4, and two ends are by nut (scheming not show) fixedly upper plate 1, base plate 2.
Upper plate 1 is equipped with vacuum meter 11, rotary valve 12, goes up check-out console 13, connects vacuum meter 11 and rotary valve 12 at last check-out console 13 two ends, and the other end of rotary valve 12 connects pipe in vacuum pump (external components, figure does not show).
The following check-out console 31 of stickup of plane center fixed and the corresponding flat seal rubber of the required surveyed area of guide plate on the movable plate 3 (figure does not show that the flat seal rubber of present embodiment is an octagon).This is check-out console 31 center pits (figure does not show) connection pipe to less transparent vessel 32 upper end down, these transparent vessel 32 upper ends are opened two holes and are joined with two tubes 33,34 respectively, pipe 33 upper ends communicate with atmosphere, the lower end mouth of pipe is inserted in 100mm place under water, another root pipe 34 is for what drawn by center pit, and its end is inserted in the upper end of transparent vessel 32.
Base plate 2 main cylinder 21 and the pneumatic switchs 22 installed.Cylinder 21 piston rod parts are by the flange that is threaded, and in movable plate lower plane (scheming not shown), piston rod drive movable plate 3 moves up and down this flange thus with bolt.
Groundwork principle of the present invention:
At first opening the pressure regulation that connects air compressor is 0.5~0.6Mpa, pneumatic switch reaches the cylinder piston retraction, the drive movable plate is downward, then guide plate is placed on the check-out console flat seal rubber, opening cylinder upwards compresses with the upper plate check-out console, two planes contact simultaneously around making guide plate like this, are in sealing state.Open vacuum pump again in the 5mm mercury slug, open the rotary valve of upper plate, make vacuum pump take out air between guide plate and the check-out console, make vacuum gauge pressure and vacuum pump pressure synchronous.Then rotary valve cuts out, what change the range estimation vacuum gauge pressure has, and motionless as the vacuum indicator, the transparent vessel small tubes is not got blister, and illustrates that the guide plate quality is fine, does not leak.If instead the vacuum gauge pressure pointer descends, the bubbling of transparent vessel small tubes illustrates the defective gas leakage of guide plate.Detected, the pneumatic switch counter-rotating makes the piston retraction, takes out guide plate, detects next piece guide plate again.
Descend as vacuum pressure, the not bubbling of transparent vessel tubule may be that guide plate is not put into the tram or the device sealing is gone wrong.So detect the up-to-standard and defective very guaranteed of guide plate with this device, efficient also improves several times.

Claims (4)

1. a vacuum leak detector that is used for flow guide plate of fuel cell is characterized in that, comprises upper plate, movable plate, base plate, guide pillar, and described movable plate is located between upper plate and the base plate and is run through by guide pillar and move up and down along it; Described upper plate is provided with vacuum meter, rotary valve, goes up check-out console, and the described check-out console two ends of going up connect vacuum meter, rotary valve respectively, and the other end of described rotary valve connects the vacuum pump of peripheral hardware; Following check-out console of last plane center fixed of described movable plate, this time check-out console is provided with a center pit, connect in the transparent vessel that a pipe to is equipped with water by this center pit, this transparent vessel upper end has two holes, insert for two tubes respectively, wherein an end of a pipe inserts in the water, and the other end leads directly to atmosphere, one end of another root pipe links to each other with the center pit of following check-out console, and the other end inserts the transparent vessel upper end; The described last plane of check-out console down is provided with one and the corresponding plane of the required surveyed area of guide plate rubber sealing ring.
2. a kind of vacuum leak detector that is used for flow guide plate of fuel cell according to claim 1, it is characterized in that, described base plate is provided with cylinder, pneumatic switch, and the piston rod part of described cylinder is fixed in the movable plate lower plane, and piston rod drive movable plate moves up and down thus.
3. a kind of vacuum leak detector that is used for flow guide plate of fuel cell according to claim 1 is characterized in that described guide pillar is provided with four, and the upper and lower part of these four guide pillars is fixed on upper plate, the base plate by nut respectively.
4. a kind of vacuum leak detector that is used for flow guide plate of fuel cell according to claim 2, it is characterized in that, the piston rod part of described cylinder is by the flange that is threaded, and in the movable plate lower plane, and piston rod drives movable plate and moves up and down this flange thus by bolt.
CNB2004100931067A 2004-12-16 2004-12-16 Vacuum leakage detector for flow guide plate of fuel cell Active CN100516803C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004100931067A CN100516803C (en) 2004-12-16 2004-12-16 Vacuum leakage detector for flow guide plate of fuel cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100931067A CN100516803C (en) 2004-12-16 2004-12-16 Vacuum leakage detector for flow guide plate of fuel cell

Publications (2)

Publication Number Publication Date
CN1789943A CN1789943A (en) 2006-06-21
CN100516803C true CN100516803C (en) 2009-07-22

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101498614B (en) * 2008-01-30 2010-11-10 中国科学院宁波材料技术与工程研究所 Leak detection method and apparatus for solid oxidized fuel cell
CN101514937B (en) * 2008-02-20 2010-10-06 力帆实业(集团)股份有限公司 Engine water pump leakage detecting device
CN102087161B (en) * 2010-11-25 2012-09-12 新源动力股份有限公司 Water jacket tightness detection device and method for bipolar plate of fuel cell
CN109932142A (en) * 2017-12-19 2019-06-25 中国科学院大连化学物理研究所 A kind of fuel battery double plates and MEA leakage detection apparatus, bipolar plates resistance drop measuring device

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Owner name: SHANGHAI SHEN-LI HIGH TECH CO., LTD. STATE GRID CO

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Patentee after: Shanghai Shen-Li High Tech Co., Ltd.

Patentee after: State Grid Corporation of China

Address before: 201401, Shanghai Industrial Development Zone, dragon Yang Industrial Park, an international 27

Patentee before: Shanghai Shen-Li High Tech Co., Ltd.