CN102507105B - Detection device for seal strength of bipolar plate water cavity of fuel cell and detection method thereof - Google Patents
Detection device for seal strength of bipolar plate water cavity of fuel cell and detection method thereof Download PDFInfo
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- CN102507105B CN102507105B CN201110353507.1A CN201110353507A CN102507105B CN 102507105 B CN102507105 B CN 102507105B CN 201110353507 A CN201110353507 A CN 201110353507A CN 102507105 B CN102507105 B CN 102507105B
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Abstract
The invention relates to a detection device for the seal strength of a bipolar plate water cavity of a fuel cell and a detection method thereof. The device comprises an air source, a gas circulation pipeline, a pressure reducing valve, a pressure gauge, testing end plates and a press; upper and lower testing end plates are provided with testing end plate positioning holes corresponding to positioning holes of a bipolar plate to be detected, and positioning pins penetrate through the positioning holes; the upper testing end plate is provided with testing end plate air inlet and outlet communicated with an inlet and an outlet of the bipolar plate water cavity to be detected, the air outlet is connected with a stop valve, the air inlet is connected with the pressure reducing valve and the air source through a pipeline, and the pressure gauge is connected between the air inlet and the pressure reducing valve; and the testing end plates clamp the bipolar plate to be detected between an upper die and a lower die of the press. The detection method comprises the following step of: constantly increasing the pressure of testing air introduced into a component to be detected until the index of the pressure gauge in the pipeline is reduced, so that the pressure at the moment is judged to be the seal strength of the bipolar plate water cavity. The method is easy to implement and can really reflect the seal strength of the bipolar plate water cavity, so test results are real, effective and accurate.
Description
Technical field
The present invention relates to fuel cell technology field, relate in particular to pick-up unit and the detection method of fuel cell bipolar plate water cavity sealing strength.
Background technology
Bipolar plates is one of core component of Proton Exchange Membrane Fuel Cells, and it is by minus plate and positive plate bonds by adhesive glue or laser bonding is formed by connecting.Tack line or sealing wire are distributed in bipolar plates outer ring, play sealing bipolar plates water cavity.
For bonding or the method for testing that is welded to connect intensity, be at present generally according to national standard, the maximum, force while utilizing universal testing machine to measure sample to destroy, specifically if publication number is the patent of invention of CN 101509867A.But in Proton Exchange Membrane Fuel Cells field, the method can only reflect pulling strengrth, can not truly reflect the sealing intensity of bipolar plates water cavity.Publication number is the patent of invention of CN 102087161A, discloses a kind of fuel battery double plates water cavity air-tightness detection device and detection method.The method is only to detect the impermeability situation of bipolar plates water cavity under specified air pressure, investigation be the qualification rate of bipolar plates, sample is not played to destruction, can not reflect the sealing intensity of bipolar plates water cavity.
Summary of the invention
The object of the invention is for a kind of pick-up unit and detection method that can detect truly, effectively, accurately the sealing intensity of fuel battery double plates water cavity is provided.
Adopt following technical scheme:
A pick-up unit for fuel cell bipolar plate water cavity sealing strength, comprises that source of the gas, gas communication pipeline, reduction valve, tensimeter, test end plate and press form; Described test end plate is that two ends are thick, " recessed " shape structure of intermediate thin, comprises test bottom plate and test upper head plate, and test bottom plate is " recessed " shape structure just, and corresponding test upper head plate is " recessed " shape structure;
The position at four angles of test bottom plate is provided with the test bottom plate pilot hole corresponding with pilot hole in tested bipolar plates; One end of test upper head plate is provided with the test upper head plate air admission hole being communicated with the import of tested bipolar plates water cavity, the other end of test upper head plate is provided with the test end plate venthole being communicated with tested bipolar plates water cavity outlet, test end plate venthole end connects stop valve, and the position at four angles of test upper head plate is provided with the test upper head plate pilot hole corresponding with pilot hole in tested bipolar plates; Test upper head plate pilot hole, test bottom plate pilot hole and tested bipolar plates pilot hole are all through holes, and register pin connects pilot hole; Test upper head plate air admission hole is connected with reduction valve by pipeline, and reduction valve is connected with source of the gas by pipeline, and tensimeter is connected to be tested on the pipeline that upper head plate air admission hole is connected with reduction valve; Test lead plate holder is held tested bipolar plates, is placed between the upper die and lower die of press.
The aperture of test upper head plate pilot hole of the present invention, test bottom plate pilot hole is identical with the aperture of tested bipolar plates pilot hole.
The air admission hole of test upper head plate of the present invention and the diameter of venthole are 5～10mm.
Tensimeter of the present invention is precision pressure gauge, and tensimeter precision is 0.002MPa.
Press of the present invention is comprised of rotary handle and upper and lower mould; Upper and lower mould is not of uniform size, and counterdie is a fixed large plane, and patrix is the symmetrical facets in two ends, left and right, by rotary handle, patrix is moved down to the test end plate two ends application of force.
Described source of the gas is gas cylinder, and test gas is air or nitrogen.
The method of the invention comprises the following steps:
A, cathode and anode unipolar plate bonding standard or laser bonding flow process according to the rules connects, and room temperature is positioned over smooth, bright and clean place is stablized its performance.
B, the sticky water cavity sealing of the bipolar plates after stable connection tree lace is placed on test bottom plate, by pilot hole and register pin, locates, it on, place and test upper head plate, also by pilot hole and register pin, locate;
C, the tested assembly that step b is assembled are placed between the upper die and lower die of press, and rotary press rotary handle regulates applied pressure size, realizes the positiver sealing to tested assembly;
D, close the stop valve of test upper head plate gas outlet end, open source of the gas and regulate reduction valve to pressure stability pressurize 2～5min, observe the tensimeter in pipeline simultaneously, if tensimeter is unchanged between this hold period, illustrate that bipolar plates water cavity sealing intensity is greater than this test pressure;
E, adjusting reduction valve, improve test pressure, treats the follow-up continuation of insurance pressure of pressure stability 2～5min, continues to observe the tensimeter in pipeline simultaneously, if tensimeter is still unchanged between this hold period, illustrates that bipolar plates water cavity sealing intensity is still greater than this test pressure;
F, repeating step e, until test pressure is brought up to certain numerical value or at this numerical value between hold period, tensimeter index declines suddenly, pressure is now judged to be the sealing intensity of bipolar plates water cavity.
Because test end plate is " recessed " shape design of the thick intermediate thin in two ends, therefore tested bipolar plates two ends are stressed, centre does not stress, during pressurization, bipolar plates similarly is to blow up a balloon, connecting line in the middle of pressure hour cathode-anode plate can bear thereby impermeability good, while being loaded into the limit, connecting line will explosion, can reflect really the sealing intensity of bipolar plates water cavity.The pressure being applied in MUT module under test is piecemeal increase, increase at every turn the smaller the better, and till must being increased to the gas leakage of tested bipolar plates water cavity.
Accompanying drawing explanation
Fig. 1 formation schematic diagram of the present invention;
Fig. 2 tests end plate upper head plate vertical view;
Fig. 3 tests end plate bottom plate vertical view;
The tested bipolar plates positive plate schematic diagram of Fig. 4 embodiment;
The tested bipolar plates minus plate schematic diagram of Fig. 5 embodiment;
The tested bipolar plates positive plate water cavity sealing tree lace schematic diagram of Fig. 6 embodiment;
The tested bipolar plates minus plate water cavity sealing tree lace schematic diagram of Fig. 7 embodiment.
In accompanying drawing: 1, gas cylinder; 2, gas communication pipeline; 3, reduction valve; 4, precision pressure gauge; 5, press rotary handle; 6, press patrix; 7, press counterdie; 8, test upper head plate; 9, test bottom plate; 10, tested bipolar plates; 11, stop valve; 12, upper head plate air admission hole; 13, upper head plate venthole; 14, upper head plate pilot hole (4 corner each 1); 15, bottom plate pilot hole (4 corner each 1); 16, positive plate water cavity import; 17, positive plate water cavity outlet; 18, positive plate water cavity bonding or sealing wire; 19, minus plate water cavity import; 20, minus plate water cavity outlet; 21, minus plate water cavity bonding or sealing wire; 22, positive plate pilot hole; 23, minus plate pilot hole; 24, positive plate flow field area; 25, minus plate flow field area.
Embodiment
The following examples can make the present invention of those of ordinary skill in the art's comprehend, but do not limit the present invention in any way.
The pick-up unit of fuel cell bipolar plate water cavity sealing strength, comprises that gas cylinder, gas communication pipeline, reduction valve 3, tensimeter 4, test end plate 8,9 and press form, and test gas is nitrogen.Test end plate 8,9 be that two ends are thick, " recessed " shape structure of intermediate thin, comprises test bottom plate and test upper head plate, and test bottom plate is " recessed " shape structure just, and corresponding test upper head plate is " recessed " shape structure; The position at four angles of test bottom plate 9 is provided with the test bottom plate pilot hole 15 corresponding with pilot hole 22,23 in tested bipolar plates 10; One end of test upper head plate 8 is provided with the test upper head plate air admission hole 12 being communicated with tested bipolar plates 10 water cavity imports 16,19, the other end of test upper head plate 8 is provided with and tested bipolar plates 10 water cavity outlet 17, the 20 test end plate ventholes 13 that are communicated with, test end plate venthole 13 ends connect stop valve 11, and the diameter in test end plate inlet, outlet hole is 5mm; The position at four angles of test upper head plate 8 is provided with the test upper head plate pilot hole 14 corresponding with pilot hole 22,23 in tested bipolar plates 10; Test upper head plate pilot hole 14, test bottom plate pilot hole 15 and tested bipolar plates pilot hole 22,23 are all through holes, and register pin connects pilot hole; Test upper head plate air admission hole 12 is connected with reduction valve 3 by pipeline, and reduction valve 3 is connected with source of the gas by pipeline, and tensimeter 4 is connected to be tested on the pipeline that upper head plate air admission hole 12 is connected with reduction valve 3; Test lead plate holder is held tested bipolar plates 10, is placed between the patrix 6 and counterdie 7 of press.
During assembling test part, positive plate (Fig. 4) is connected along tack line or sealing wire 18,21 with minus plate (Fig. 5) bonding standard or laser bonding flow process according to the rules, the closed structure that forms bipolar plates water cavity, room temperature is positioned over smooth, bright and clean place is stablized its performance.Bipolar plates water cavity mouth after switching performance is the stable tree lace that is bonded and sealed, is specially: positive plate water cavity import and export 16,17 bonding positive plate water cavities sealing tree laces, as shown in Figure 6; Minus plate water cavity import and export 19,20 bonding minus plate water cavity sealing tree laces, as shown in Figure 7.As shown in Figure 3, at 4 pilot holes, 15 places that test the bottom plate 9 of end plate, register pins are installed, this operation can guarantee to test between bipolar plates 10, test end plate upper head plate 8 and test end plate bottom plate 9 and realize accurate location.The bipolar plates 10 that glues sealing tree lace is put on test end plate bottom plate 9, and both rely on register pin accurately to locate.Close and test end plate upper head plate 8, three relies on register pin location equally.The end plate that installs test sample is lain against to the centre position of press counterdie 7, and by the rotary handle 5 on rotary press patrix 6, apply certain pressure to test end plate, make to test bipolar plates and obtain positiver sealing.Close the valve of stop valve 11, make proving installation airtight.
After above preliminary work finishes, start test, first open the valve of reduction valve 3, regulate pressure to 0.10MPa, after gaseous tension is stable, with manual time-keeping, observe precision pressure gauge 4 index variation situation in 2min.If index is constant, regulate reduction valve 3 to improve pressure to 0.12MPa, 0.14MPa, 0.16MPa ..., pressurize is also observed precision pressure gauge 4.If bring up to certain pressure value and at this numerical value between hold period, tensimeter index declines suddenly, pressure is now judged to be the sealing intensity of bipolar plates water cavity.After sample detection, close the valve of reduction valve 3 and gas cylinder 1, test job finishes.For example, when pressure increases to 3.02MPa, hear " bang " sound, being accompanied by precision pressure gauge 4 index busts is 0, judges that 3.02MPa is as the sealing intensity of this bipolar plates water cavity.
The original upload pressure and the dwell time that it should be noted that test can rule of thumb suitably be adjusted, and to improve the less net result of pressure more accurate at every turn.
Claims (7)
1. the pick-up unit of a fuel cell bipolar plate water cavity sealing strength, comprise that source of the gas, gas communication pipeline, reduction valve (3), tensimeter (4), test end plate (8,9) and press form, it is characterized in that: described test end plate is that two ends are thick, " recessed " shape structure of intermediate thin, comprise test bottom plate and test upper head plate, test bottom plate is " recessed " shape structure just, and corresponding test upper head plate is " recessed " shape structure;
The position at four angles of test bottom plate (9) is provided with the test bottom plate pilot hole (15) corresponding with pilot hole (22,23) in tested bipolar plates (10); One end of test upper head plate (8) is provided with the test upper head plate air admission hole (12) being communicated with tested bipolar plates (10) water cavity import (16,19), the other end of test upper head plate (8) is provided with the test end plate venthole (13) being communicated with tested bipolar plates (10) water cavity outlet (17,20), test end plate venthole end connects stop valve (11), and the position at four angles of test upper head plate (8) is provided with the test upper head plate pilot hole (14) corresponding with pilot hole (22,23) in tested bipolar plates (10); Test upper head plate pilot hole (14), test bottom plate pilot hole (15) and tested bipolar plates pilot hole (22,23) are all through holes, and register pin connects pilot hole; Test upper head plate air admission hole (12) is connected with reduction valve (3) by pipeline, reduction valve (3) is connected with source of the gas by pipeline, and tensimeter (4) is connected on the pipeline that is connected with reduction valve (3) of test upper head plate air admission hole (12); Test lead plate holder is held tested bipolar plates (10), is placed between the patrix (6) and counterdie (7) of press.
2. the pick-up unit of fuel cell bipolar plate water cavity sealing strength according to claim 1, is characterized in that: the aperture of described test upper head plate pilot hole (14), test bottom plate pilot hole (15) is identical with the aperture of tested bipolar plates pilot hole (22,23).
3. the pick-up unit of fuel cell bipolar plate water cavity sealing strength according to claim 1, is characterized in that: the diameter of the air admission hole of described test upper head plate (12) and venthole (13) is 5～10mm.
4. the pick-up unit of fuel cell bipolar plate water cavity sealing strength according to claim 1, is characterized in that: described tensimeter (4) is precision pressure gauge, and tensimeter precision is 0.002MPa.
5. the pick-up unit of fuel cell bipolar plate water cavity sealing strength according to claim 1, is characterized in that: described press is comprised of rotary handle and upper and lower mould; Upper and lower mould is not of uniform size, and counterdie is a fixed large plane, and patrix is the symmetrical facets in two ends, left and right, by rotary handle, patrix is moved down to the test end plate two ends application of force.
6. the pick-up unit of fuel cell bipolar plate water cavity sealing strength according to claim 1, is characterized in that: described source of the gas is gas cylinder (1), and test gas is air or nitrogen.
7. the method for testing of the pick-up unit of fuel cell bipolar plate water cavity sealing strength as claimed in claim 1, is characterized in that said method comprising the steps of:
A, cathode and anode unipolar plate bonding standard or laser bonding flow process according to the rules connects, and room temperature is positioned over smooth, bright and clean place is stablized its performance;
B, that the sticky water cavity sealing of the bipolar plates after stable connection (10) tree lace is placed on to test bottom plate (9) is upper, by pilot hole and register pin, locates, and it on, places and tests upper head plate (8), also by pilot hole and register pin, locates;
C, the tested assembly that step b is assembled are placed between the patrix (6) and counterdie (7) of press, and rotary press rotary handle (5) regulates applied pressure size, realizes the positiver sealing to tested assembly;
D, close test upper head plate gas outlet (13) end stop valve (11), open source of the gas and regulate reduction valve (3) to pressure stability, and pressurize 2～5min, observe the tensimeter (4) in pipeline simultaneously, if tensimeter (4) is unchanged between this hold period, illustrate that tested bipolar plates (10) water cavity sealing intensity is greater than this test pressure;
E, adjusting reduction valve (3), improve test pressure, treat the follow-up continuation of insurance pressure of pressure stability 2～5min, continue to observe the tensimeter (4) in pipeline simultaneously, if tensimeter (4) is still unchanged between this hold period, illustrate that bipolar plates water cavity sealing intensity is still greater than this test pressure;
F, repeating step e, until test pressure is brought up to certain numerical value and at this numerical value between hold period, tensimeter index declines suddenly, pressure is now judged to be the sealing intensity of bipolar plates water cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110353507.1A CN102507105B (en) | 2011-11-09 | 2011-11-09 | Detection device for seal strength of bipolar plate water cavity of fuel cell and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110353507.1A CN102507105B (en) | 2011-11-09 | 2011-11-09 | Detection device for seal strength of bipolar plate water cavity of fuel cell and detection method thereof |
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| CN102507105B true CN102507105B (en) | 2014-08-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109420899B (en) * | 2017-08-29 | 2024-06-21 | 上海铭寰新能源科技有限公司 | Fuel cell press with movable tool |
| CN108645573B (en) * | 2018-08-10 | 2024-04-19 | 麦格纳（太仓）汽车科技有限公司 | Comprehensive test method and device for detecting tightness of vehicle lamp |
| CN109301286A (en) * | 2018-11-21 | 2019-02-01 | 新源动力股份有限公司 | A kind of fuel battery double plates assembly area device for detecting sealability and detection method |
| CN109612650B (en) * | 2019-01-15 | 2023-10-13 | 安徽明天氢能科技股份有限公司 | Fuel cell bipolar plate air tightness detection tool |
| 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 |
| CN111006967A (en) * | 2019-11-27 | 2020-04-14 | 浙江嘉杰汽车设计有限公司 | Clamp for detecting compactness of fuel cell bipolar plate |
| CN111693195B (en) * | 2020-06-22 | 2021-08-24 | 上海捷氢科技有限公司 | Device and method for acquiring assembly force of fuel cell |
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| US4205551A (en) * | 1979-04-02 | 1980-06-03 | The Aro Corporation | Seal tester |
| JP3618725B2 (en) * | 2002-04-22 | 2005-02-09 | ワイエル工業株式会社 | Inspection method of seal part of resin tube |
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Effective date of registration: 20190709 Address after: 116085 No. 907 Huangpu Road, Dalian High-tech Park, Liaoning Province Co-patentee after: Saic Motor Corporation Limited Patentee after: Sunrise Power Co., Ltd. Address before: 116085 Huangpu Road 907, Dalian High-tech Park, Liaoning Province Patentee before: Sunrise Power Co., Ltd. |