CN1804571A - Method for testing airtightness of bipolar plate material and special clamp therefor - Google Patents
Method for testing airtightness of bipolar plate material and special clamp therefor Download PDFInfo
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- CN1804571A CN1804571A CN 200610037961 CN200610037961A CN1804571A CN 1804571 A CN1804571 A CN 1804571A CN 200610037961 CN200610037961 CN 200610037961 CN 200610037961 A CN200610037961 A CN 200610037961A CN 1804571 A CN1804571 A CN 1804571A
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Abstract
The invention discloses a method for measuring the double-polar plate material air impermeability and its special holder. It first uses tested double-polar plate material to form the plate with different sharp and size; then it prepares for a pair of holder by the structure sharp of the plate, one side of the corresponding plate arranges an air channel and the other side arranges a test channel; it uses the holder to hold the plate; it pitches the test gas with the pressure range 0.01-0.5MPa to the air channel of the holder; it uses gas flow indicator to measure the flow speed of the emergent gas in the test channel.
Description
One, technical field
The present invention relates to the bubble-tight method of testing of material, specifically the method for testing of the airtightness of bipolar plate material of a proton exchanging film fuel battery in addition, the invention still further relates to a kind of unit clamp that this method adopts.
Two, background technology
Proton Exchange Membrane Fuel Cells is a kind of device that produces electric energy by the electrochemical reaction of fuel and oxygenant.The core component of this device is membrane electrode (Membrane Electrode Assembly is called for short MEA), is made up of two porous conductive materials and a slice PEM that is clipped in the middle.On the interface of PEM and conductive material (as carbon paper), be attached with electrochemical catalyst.Another vitals of Proton Exchange Membrane Fuel Cells is a bipolar plates.But contain the passage of supplied gas (as hydrogen or air) circulation and the passage of cooling medium (as air or water) circulation on the bipolar plates.The one side that bipolar plates has the gas stream passage contacts with membrane electrode, and forms a relative sealed space jointly with membrane electrode.
When hydrogen is entered the space that bipolar plates and membrane electrode form by the hydrogen inlet of fuel cell pack after, see through the surface that porous conductive material (as carbon paper) arrives catalyzer.Under the effect of catalyzer, hydrogen generation electrochemical reaction, hydrogen atom loses electronics becomes positive ion (proton).Electronics arrives electrical appliance by porous conductive material (as carbon paper) and conductive bipolar plate, arrives the catalyst surface of membrane electrode opposite side again by conductive bipolar plate and porous conductive material (as carbon paper).Under the effect of catalyzer, electronics with see through porous conductive material (as carbon paper) and arrive the oxygenant (as oxygen) of catalyst surface and arrive the proton generation electrochemical reaction of catalyst surface, reaction of formation product by PEM.
In Proton Exchange Membrane Fuel Cells, the both sides of membrane electrode are bipolar plates.A gas flow guiding groove is contained on the surface of bipolar plates at least, and diversion trench provides the passage that arrives membrane electrode for the gas of participating in electrode reaction.The reaction product that produces in reaction (as water) is discharged pile by the gas flow guiding groove.Out of pile is taken the heat that produces in the reaction in cooling duct in heat eliminating medium (as air or the water) bipolar plates of flowing through.Bipolar plates is formed through mold pressing, punching press or mechanical engraving by conductive material, for the circulation of electronics provides passage.Bipolar plates has certain intensity, for membrane electrode provides support.Bipolar plates has certain impermeability, and the encapsulant between bipolar plates, membrane electrode and bipolar plates and the membrane electrode separates fuel and the oxygenant of participating in reaction.
The impermeability of bipolar plates is very crucial to Proton Exchange Membrane Fuel Cells.Bipolar plates stops fuel and oxygenant to mix in fuel cell pack on the one hand, stops hydrogen fuel to be leaked to the outside on the other hand from fuel cell pack.In Proton Exchange Membrane Fuel Cells, fuel is to react in different conversion zones with oxygenant.If fuel and oxygenant mix in fuel cell pack, then by outside electrical appliance, the efficient of fuel cell will not reduce the electron exchange in the reaction.Reaction velocity when fuel and oxygenant mix is uncontrollable, can discharge a large amount of heats at short notice, causes burning or blast.If fuel losses to the outside of fuel cell, then not only can reduce the efficient of fuel cell, in case and fuel when concentration reaches explosion limits in extraneous subrange, will blast.
In existing fuel cell manufacture craft, the impermeability of bipolar plates is in the test of fuel cell pack assembling advancing row.This has controlled the quality of fuel cell pack to a certain extent, but exists following defective:
(1) if find it is that then all bipolar plates of having produced all can not be used owing to the bad bipolar plates that causes of impermeability that bipolar plate material causes can't be used, lose greatlyyer, and can't remedy.
(2) pile of testing under certain gaseous tension that bipolar plates was assembled into can't guarantee still have good impermeability under another different gaseous tension.
Three, summary of the invention
1, goal of the invention: the bubble-tight method of testing of a kind of dual polar plates of proton exchange membrane fuel cell material that provides in order to overcome above-mentioned defective is provided, and in addition, the present invention also provides the unit clamp that this method adopted.
2, summary of the invention: the present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of method of testing of airtightness of bipolar plate material is characterized in that this method may further comprise the steps:
(1) use bipolar plate material to be tested to make flat board with same shape and size, because when the characteristic of test bipolar plate material, need a large amount of different materials of test, different materials is made the not only convenient test of flat board of same shape and size, also make the contrast of test data more objective and accurate
(2) planform according to flat board prepares a sub-folder tool, and the corresponding dull and stereotyped side of these anchor clamps is provided with gas channel, and opposite side is provided with test channel;
(3) use the clamp flat board;
(4) at the gas channel injection pressure scope of the anchor clamps test gas at 0.01-0.5MPa, test gas can be air, nitrogen, oxygen or hydrogen, the gas that these are commonly used when all being the fuel cell pack test;
(5), determine the air-tightness of bipolar plate material according to the difference of flow velocity at the flow velocity of the test channel using gases flowmeter survey emergent gas of anchor clamps.
According to the needs of making the different model bipolar plates, the test of different batches is with dull and stereotyped, and its shape can be circle or polygon, and thickness can be between the 0.1-10mm.
A kind of unit clamp of testing airtightness of bipolar plate material, it comprises train wheel bridge and lower plate, the edge of flat board corresponding to be tested is provided with sealing strip on train wheel bridge and lower plate, is provided with gas channel on train wheel bridge, is provided with test channel on lower plate.On train wheel bridge and lower plate, sealing strip is set, be to be used to prevent the ovfl of test gas, during test, utilize upper and lower clamping plate that flat board is clamped from flat board, in gas channel, inject test gas, the flow velocity of using gases flowmeter survey emergent gas in test channel.
3, beneficial effect: the present invention compared with prior art has the following advantages: (1) tests its air-tightness after need not bipolar plate material is processed into the bipolar plates finished product again, and very high and waste product is difficult to reclaim because of the bipolar plates manufacturing cost, so effectively reduce cost; (2) the different material flat board of all making same geomery is tested, and not only makes test more convenient, also makes the contrast of test data more objective and accurate; (3) test slab of different batches can be made different shapes and thickness as required with the adaptive testing requirement; (4) pressure of the test gas of Zhu Ruing can 0.01-0.5MPa very on a large scale in regulate, to adapt to the air tightness test requirement of bipolar plate material under the different operating pressure, relative and existing bipolar plates must be made finished product and test under fixed pressure, has improved the accuracy of test data; (5) realize that the unit clamp of this method is simple in structure, easy to use.
Four, description of drawings:
The structural representation of special-purpose anchor clamps among Fig. 1 the present invention.
Five, embodiment
Embodiment 1: a kind of method of testing of airtightness of bipolar plate material, and this method may further comprise the steps:
(1) it is circular using bipolar plate material to be tested to make shape, and thickness is the same a collection of flat board of 5mm;
(2) planform according to flat board prepares a sub-folder tool, and the corresponding dull and stereotyped side of these anchor clamps is provided with gas channel, and opposite side is provided with test channel;
(3) use the clamp flat board;
(4) at the air of the gas channel injection pressure 0.2MPa of anchor clamps;
(5), determine the air-tightness of bipolar plate material according to the difference of flow velocity at the flow velocity of the test channel using gases flowmeter survey emergent gas of anchor clamps.
Embodiment 2: a kind of method of testing of airtightness of bipolar plate material, and this method may further comprise the steps:
(1) using bipolar plate material to be tested to make shape is quadrilateral, and thickness is the same a collection of flat board of 8mm;
(2) planform according to flat board prepares a sub-folder tool, and the corresponding dull and stereotyped side of these anchor clamps is provided with gas channel, and opposite side is provided with test channel;
(3) use the clamp flat board;
(4) at the nitrogen of the gas channel injection pressure 0.4MPa of anchor clamps;
(5), determine the air-tightness of bipolar plate material according to the difference of flow velocity at the flow velocity of the test channel using gases flowmeter survey emergent gas of anchor clamps.
In order to realize above-mentioned method of testing, the present invention also provides a kind of unit clamp, and it comprises train wheel bridge 1 and lower plate 2, and the edge of flat board 3 corresponding to be tested is provided with sealing strip 4 on train wheel bridge 1 and lower plate 2, on train wheel bridge 1, be provided with gas channel 5, on lower plate 2, be provided with test channel 6.On train wheel bridge 1 and lower plate 2, sealing strip 4 is set, be to be used to prevent that test gas from leaking around dull and stereotyped 3, during test, utilize upper and lower clamping plate that flat board 3 is clamped, in gas channel 5, inject test gas, the flow velocity of using gases flowmeter survey emergent gas in test channel 6.
Claims (5)
1, a kind of method of testing of airtightness of bipolar plate material is characterized in that this method may further comprise the steps:
(1) use different bipolar plate materials to be tested to make flat board with same shape and size;
(2) planform according to flat board prepares a sub-folder tool, and the corresponding dull and stereotyped side of these anchor clamps is provided with gas channel, and opposite side is provided with test channel;
(3) use the clamp flat board;
(4) at the gas channel injection pressure scope of anchor clamps test gas at 0.01-0.5MPa;
(5) at the flow velocity of the test channel using gases flowmeter survey emergent gas of anchor clamps.
2, the method for testing of airtightness of bipolar plate material according to claim 1 is characterized in that in step (1), the shape of described flat board is circle or polygon.
3, the method for testing of airtightness of bipolar plate material according to claim 1 is characterized in that the thickness of described flat board is 0.1-10mm in step (1).
4, the method for testing of airtightness of bipolar plate material according to claim 1 is characterized in that in step (4), described test gas is air, nitrogen, oxygen or hydrogen.
5, a kind of unit clamp of testing airtightness of bipolar plate material, it is characterized in that it comprises train wheel bridge (1) and lower plate (2), upward sealing strip (4) is set the edge of flat board (3) corresponding to be tested at train wheel bridge (1) and lower plate (2), on train wheel bridge (1), be provided with gas channel (5), on lower plate (2), be provided with test channel (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610037961 CN1804571A (en) | 2006-01-24 | 2006-01-24 | Method for testing airtightness of bipolar plate material and special clamp therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610037961 CN1804571A (en) | 2006-01-24 | 2006-01-24 | Method for testing airtightness of bipolar plate material and special clamp therefor |
Publications (1)
| Publication Number | Publication Date |
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| CN1804571A true CN1804571A (en) | 2006-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610037961 Pending CN1804571A (en) | 2006-01-24 | 2006-01-24 | Method for testing airtightness of bipolar plate material and special clamp therefor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470435A (en) * | 2019-09-19 | 2019-11-19 | 上海电气集团股份有限公司 | A kind of detection device and its method for flow battery material |
| WO2021103174A1 (en) * | 2019-11-27 | 2021-06-03 | 浙江嘉杰汽车设计有限公司 | Clamp for detecting density performance of fuel cell bipolar plate |
-
2006
- 2006-01-24 CN CN 200610037961 patent/CN1804571A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110470435A (en) * | 2019-09-19 | 2019-11-19 | 上海电气集团股份有限公司 | A kind of detection device and its method for flow battery material |
| CN110470435B (en) * | 2019-09-19 | 2022-04-12 | 上海电气集团股份有限公司 | Detection device and method for flow battery material |
| WO2021103174A1 (en) * | 2019-11-27 | 2021-06-03 | 浙江嘉杰汽车设计有限公司 | Clamp for detecting density performance of fuel cell bipolar plate |
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