CN100575862C - A kind of apparatus and method of measuring surface smoothness of double plate in fuel cell - Google Patents
A kind of apparatus and method of measuring surface smoothness of double plate in fuel cell Download PDFInfo
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- CN100575862C CN100575862C CN200710011147A CN200710011147A CN100575862C CN 100575862 C CN100575862 C CN 100575862C CN 200710011147 A CN200710011147 A CN 200710011147A CN 200710011147 A CN200710011147 A CN 200710011147A CN 100575862 C CN100575862 C CN 100575862C
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- fuel cell
- test block
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- 239000000446 fuel Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 claims abstract description 119
- 238000009792 diffusion process Methods 0.000 claims abstract description 18
- 238000004832 voltammetry Methods 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004441 surface measurement Methods 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Fuel Cell (AREA)
Abstract
The invention discloses a kind of apparatus and method of measuring surface smoothness of double plate in fuel cell, it is characterized in that this device comprises test end plate, end plate and test block, the test end plate is provided with fastening screw keyhole, test block mounting hole and pilot hole, end plate is provided with fastening screw keyhole and pilot hole equally with the relative position of test end plate, pole plate and diffusion layer are sandwiched in test end plate and the end plate, position of positioning hole on the pilot hole plates of similar polarity on test end plate and the end plate is corresponding to be positioned by register pin, and the back is fixed with fastening bolt; Test block is fixedly mounted in the test block mounting hole; Also comprise constant-current supply, the voltage table of Shi Yonging utilizes voltammetry to come the contact resistance of pole plate is tested according to certain technological process simultaneously, after draw the flatness of pole plate.These apparatus and method have characteristics such as accuracy height, easy to operate and mechanism are simple, are suitable for extensively promoting in the Test Application of pole plate flatness.
Description
Technical field
The present invention relates to a kind of device and method of measuring pad flatness, relate in particular to a kind of apparatus and method of measuring surface smoothness of double plate in fuel cell.
Background technology
Fuel cell pack is that the monocell of multilayer series connection assembles, monocell is again that composite wafer is formed by stacking, the monocell assembly comprises bipolar plates, diffusion layer, membrane electrode etc., be the thin slice of plane contact, therefore require each assembly to have high flatness, so-called flatness is the height that plate concave-convex surface point differs, ability bonding battery surface flatness, have only monocell to guarantee high flatness, could guarantee the battery pile assembling, and the assembly that possesses rigidity in battery pile has only bipolar plates, so the flatness of bipolar plates is the core component of bonding battery flatness, also is the core component that guarantees the battery pile assembling.
The processing of bipolar plates also must be satisfied the requirement of fuel cell assembling except that go out the required flow field of fuel cell according to Design and Machining.The requirement of fuel cell performance and assembling, bipolar plate flow field ridge plane must guarantee high flatness, guarantees that contacting each point pressure between bipolar plates ridge plane and the diffusion layer evenly distributes.In fact because processing, certainly exist machining deviation, special bipolar plates for mold pressing or other deformation processing, because the difference of material deformation and the unevenness of material itself, to make that machining deviation is inevitable, this deviation surpasses certain limit will greatly influence the fuel battery performance performance, the particularly influence of fluid motion, also must have influence on simultaneously the fuel cell assembling, be inhomogeneous damage or the inefficacy that causes the fuel cell miscellaneous part easily of local pressure, even the battery pile joint number is limited, causes and can not assemble out the design power battery pile.Therefore, the flatness on bipolar plates ridge plane needs higher precision, must be monitored.The method of surface measurements flatness is a lot, comprise many devices, as the testing flatness instrument of making according to the refraction principle of light, various testing flatness instrument of making according to the method for testing of mechanical planarization degree etc., the big plane of the main test of these devices, since bipolar plate surfaces be groove 10 structures as shown in Figure 1, and groove 10 width are all very narrow, the plane of pole plate generation is the ridge plane just like this, so for the surface measurement employing optics of bipolar plates, the method detection method complexity of machinery, and out of true.
Contact resistance is that two conductors are in contact with one another the resistance that energising produces.When conductor was thin plate, the resistance that the energising of thin plate plane contact produces can be represented with following empirical representation:
Rj＝Kc/Fm
In the formula: the F--contact pressure
The coefficient that m--is relevant with contact form, contact gets 0.5,0.7,1 respectively to point, line, surface;
Kc--and contact material, surface condition, the coefficient that the way of contact etc. are relevant is drawn by experiment usually
As can be seen, contact resistance is relevant with contact pressure from expression formula, and contact pressure is relevant with the thin sheet surface flatness, therefore can adopt the method test bipolar plates ridge plane surface flatness of testing contact resistance.
Adopt the method for contact resistance to detect just to have avoided system and the experimental error brought because of complex structure.Contact resistance is the resistance during energising between the conductor of plane contact, the reason that produces contact resistance has two aspects: 1. because surface of contact uneven, the real contact area of conductor is reduced, thereby serious shrinkage phenomenon to take place and produce contraction resistance in the electric current that flows through surface of contact; 2. generate the bad film of conduction and produce film resistance at surface in contact.The pressure that increases on the contact can increase contact point number on the surface of contact, and contraction resistance is reduced.Increase the contact force surface film of can also crushing, film resistance is inhibited.The principal element that influences contact resistance value has: the hardness of conductive material, the roughness of surface of contact, the micro-geometric configuration of surface of contact, contact pressure and apparent contact area and rete resistance.When other states one timings of conductive surface, when being the rete resistance stabilization, contact resistance is only relevant with contact pressure, particularly under low-pressure, the experiment proved that, contact resistance is very responsive to contact pressure, the present invention utilizes this principle exactly, the irregularity degree of bipolar plate surfaces is come out with the characterization of resistance by the difference of pressure, the carbon paper diffusion layer that is bipolar plates and standard flatness is assembled between the flatness target, under less assembling pressure, the contact resistance at each position of test bipolar plates, the difference of contact resistance value is exactly the difference of bipolar plate surfaces flatness.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, develop a kind of method of testing and device that utilizes contact resistance, make test more responsive, more accurate.The technology used in the present invention means are as follows:
A kind of device of measuring surface smoothness of double plate in fuel cell, it is characterized in that comprising test end plate, end plate and test block, described test end plate is provided with fastening screw keyhole, test block mounting hole and pilot hole, the position of described pilot hole is consistent with pole plate, the fastening screw keyhole is evenly distributed on the periphery of test end plate, and the test block mounting hole is evenly distributed in the zone of pilot hole; Described end plate is provided with fastening screw keyhole and pilot hole equally with the relative position of test end plate, pole plate and diffusion layer are sandwiched in test end plate and the end plate, position of positioning hole on the pilot hole plates of similar polarity on test end plate and the end plate is corresponding to be positioned by register pin, and the back is fixed with fastening bolt; Described test block is a conductive material, is fixedly mounted in the test block mounting hole; That uses simultaneously also comprises constant-current supply, voltage table, and constant-current supply is wired on test block and the pole plate, utilizes voltage table by voltammetry it to be measured then; The material of described test end plate and end plate is insulation material material, and the flatness of test end plate and end plate is in 0.03mm.
Described test block is metalwork or plating spare, and the surface of test block plates of similar polarity and diffusion layer contact jaw is consistent with the surface coincidence and the flatness of test end plate, and wherein test block plates of similar polarity contact face area is at 3～30cm
2Between; The quantity of described test block is between 3～15; Described diffusion layer is the carbon paper of standard; The cathode plate that described pole plate 4 is a fuel cell or plate or bipolar pole plate.
A kind of method that adopts the device of aforesaid measuring surface smoothness of double plate in fuel cell is characterized in that comprising the steps:
A, get the pole plate that to test, put the diffusion layer carbon paper up as test specimens;
B, the test specimens that step a is formed are placed between test end plate and the end plate, will test end plate, end plate and pole plate by register pin and position, and constitute subassembly;
C, the subassembly that step b is formed are placed on the universal testing machine operating platform, apply certain pressure as requested;
The pressure of d, maintenance step c fixes to clamp with fastening bolt;
E, take off subassembly, connect test circuit, test with voltammetry patrolling and examining between contact and the contact mold insert of pole plate;
F, to patrol and examine contact constant, tests the resistance at each mold insert place, contact one by one.
Contact mold insert described in described step e and the step f is the test block that is fastened on the test end plate; Diffusion layer carbon paper among the described step a is the carbon paper that meets the Proton Exchange Membrane Fuel Cells quality standard, and big or small and actual request for utilization is identical.
Owing to adopted the appeal technical scheme, the apparatus and method of a kind of measuring surface smoothness of double plate in fuel cell provided by the invention, method by testing contact resistance is introduced the method for test bipolar plates flatness, this method and install simple, easy and simple to handle, accuracy is high and the detection that is very suitable for standard fuel cell bipolar plate flatness with low cost.
Description of drawings
Fig. 1 is the structural representation of a pole plate among the present invention;
Fig. 2 is the structural representation of test end plate among the present invention;
Fig. 3 is the A-A direction cut-open view of Fig. 2;
Fig. 4 is the structural representation of test block (being the contact mold insert) among the present invention;
Fig. 5 is a structural representation of the present invention.
Among the figure: 1, test end plate, 2, end plate, 3, test block, 4, pole plate, 5, fastening bolt, 6, the fastening screw keyhole, 7, the test block mounting hole, 8, pilot hole, 9, register pin, 10, groove.
Embodiment
As Fig. 1～shown in Figure 5, the utility model has designed the device that detects laminar conductive surface flatness according to the testing contact resistance thinking, embodiment is as follows: the flat board with two flatness benchmark is test end plate 1 or end plate 2, the material of test end plate 1 is the insulation material, the flatness of test end plate 1 and end plate 2 should be in 0.03mm, and promptly plate concave-convex surface point and thickness differ maximum and is no more than 0.03mm.Be bumped into the test block 3 of conduction on the test end plate 1 therein, test block 3 materials can be metal or noble metal plating piece, the surface of test block 3 plates of similar polarities 4 and diffusion layer contact jaw is consistent with the surface coincidence and the flatness of test end plate 3, it is the leading-in end of electricity, be about to electric current and introduce in the pole plate 4, test block 3, diffusion layer, pole plate 4 constitute the electrical testing loop.The other end of test block 3 is drawn and test lead for electricity, promptly goes into an end of voltage table in this termination, and the shape that test block 3 is introduced end faces can be that shape such as round, square sets up on their own according to the test needs, and test block 3 introducing face areas can be 3～30cm
2, be preferably in 3～9cm
2The quantity of test block 3 is 3～15, preferably 3～9, the material of test block, shape, size unanimity are consistent with the area of pole plate 4 contacts.Pole plate 4 and diffusion layer sandwich in test end plate 1 and the end plate 2, four pilot holes 8 of design on test end plate and end plate, the position is consistent with the pilot hole on the pole plate, and is used for assembling at the outer fix Design and Machining fastening screw keyhole 6 of test end plate and end plate assembling pole plate.Wherein test block 3 is fixedly mounted in the test block mounting hole 7 as the contact mold insert; That uses simultaneously also comprises constant-current supply, voltage table and reometer, and constant-current supply is its power supply, utilizes voltage table by voltammetry it to be measured.Adopt the method for this device to comprise the steps:
A, get the pole plate 4 that will test, put up and meet the Proton Exchange Membrane Fuel Cells quality standard, the identical diffusion layer carbon paper of big or small and actual request for utilization is as test specimens;
B, the test specimens that step a is formed are placed between test end plate 1 and the end plate 2, will test end plate, end plate and pole plate by register pin 9 and position, and constitute subassembly;
C, the subassembly that step b is formed are placed on the universal testing machine operating platform, apply certain pressure as requested;
The pressure of d, maintenance step c fixes to clamp with fastening bolt 5;
E, take off subassembly, connect test circuit, test with voltammetry patrolling and examining between contact and the contact mold insert (promptly being fastened on the test block 3 on the test end plate 1) of pole plate 1;
F, to patrol and examine contact constant, and the voltage of testing each mold insert place, contact one by one draws resistance by Ohm law; As above the pole plate in the step 4 is cathode plate or the plate or the bipolar pole plate of fuel cell, simultaneously also can offline inspection bipolar plates contact resistance.Each point resistance difference has promptly reflected bipolar plates flatness difference on the same pole plate.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (9)
1, a kind of device of measuring surface smoothness of double plate in fuel cell, it is characterized in that comprising test end plate (1), end plate (2) and test block (3), described test end plate (1) is provided with fastening screw keyhole (6), test block mounting hole (7) and pilot hole (8), the position of described pilot hole (8) is consistent with pole plate (4), fastening screw keyhole (6) is evenly distributed on the periphery of test end plate (1), and test block mounting hole (7) is evenly distributed in the zone of pilot hole (8); Described end plate (2) is provided with fastening screw keyhole (6) and pilot hole (8) equally with the relative position of test end plate (1), pole plate (4) and diffusion layer are sandwiched in test end plate (1) and the end plate (2), position of positioning hole on the pilot hole plates of similar polarity (4) on test end plate (1) and the end plate (2) correspondingly positions by register pin (9), then fixes with fastening bolt (5); Described test block (3) is a conductive material, is fixedly mounted in the test block mounting hole (7); That uses simultaneously also comprises constant-current supply, voltage table, and constant-current supply is wired on test block (3) and the pole plate (4), utilizes voltage table by voltammetry it to be measured then.
2, the device of measuring surface smoothness of double plate in fuel cell according to claim 1, the material that it is characterized in that described test end plate (1) and end plate (2) is insulation material material, and the flatness of test end plate (1) and end plate (2) is in 0.03mm.
3, the device of measuring surface smoothness of double plate in fuel cell according to claim 1, it is characterized in that described test block (3) is metalwork or plating spare, the surface of test block (3) plates of similar polarity (4) and diffusion layer contact jaw is consistent with the surface coincidence and the flatness of test end plate (3), and wherein test block (3) plates of similar polarity (4) contact face area is at 3～30cm
2Between.
4, according to the device of claim 1 or 3 described measuring surface smoothness of double plate in fuel cell, the quantity that it is characterized in that described test block (3) is between 3～15.
5, the device of measuring surface smoothness of double plate in fuel cell according to claim 1 is characterized in that described diffusion layer is the carbon paper of standard.
6,, it is characterized in that described pole plate (4) is the cathode plate of fuel cell or plate or bipolar pole plate according to the device of claim 1 or 3 described measuring surface smoothness of double plate in fuel cell.
7, a kind of method that adopts the device of the described measuring surface smoothness of double plate in fuel cell of claim 1 is characterized in that comprising the steps:
A, get the pole plate (4) that to test, put the diffusion layer carbon paper up as test specimens;
B, the test specimens that step a is formed are placed between test end plate (1) and the end plate (2), will test end plate, end plate and pole plate by register pin (9) and position, and constitute subassembly;
C, the subassembly that step b is formed are placed on the universal testing machine operating platform, apply certain pressure as requested;
The pressure of d, maintenance step c fixes to clamp with fastening bolt (5);
E, take off subassembly, connect test circuit, test with voltammetry patrolling and examining between contact and the contact mold insert of pole plate (1);
F, to patrol and examine contact constant, tests the resistance at each mold insert place, contact one by one.
8, the method for the device of the described measuring surface smoothness of double plate in fuel cell of employing claim 1 according to claim 7 is characterized in that the contact mold insert described in described step e and the step f is for being fastened on the test block (3) on the test end plate (1).
9, the method for the device of the described measuring surface smoothness of double plate in fuel cell of employing claim 1 according to claim 7, it is characterized in that the diffusion layer carbon paper among the described step a is the carbon paper that meets the Proton Exchange Membrane Fuel Cells quality standard, big or small and actual request for utilization is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710011147A CN100575862C (en) | 2007-04-27 | 2007-04-27 | A kind of apparatus and method of measuring surface smoothness of double plate in fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710011147A CN100575862C (en) | 2007-04-27 | 2007-04-27 | A kind of apparatus and method of measuring surface smoothness of double plate in fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101046369A CN101046369A (en) | 2007-10-03 |
| CN100575862C true CN100575862C (en) | 2009-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710011147A Expired - Fee Related CN100575862C (en) | 2007-04-27 | 2007-04-27 | A kind of apparatus and method of measuring surface smoothness of double plate in fuel cell |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494597A (en) * | 2011-12-02 | 2012-06-13 | 新源动力股份有限公司 | Detecting device and detecting method for evenness of fuel cell bipolar plate |
| CN106443457A (en) * | 2016-08-25 | 2017-02-22 | 宁波蓝鲸自动化科技有限公司 | New energy fitting automatic performance test device |
| CN109269392B (en) * | 2018-10-31 | 2019-10-29 | 清华大学 | It is in electrical contact the insulating materials apparent height measuring device and method of feedback |
| CN109541007B (en) * | 2018-11-23 | 2020-11-06 | 新源动力股份有限公司 | Method for testing vertical resistance of catalyst layer of fuel cell |
| CN109596511A (en) * | 2018-12-10 | 2019-04-09 | 新源动力股份有限公司 | Fuel battery double plates corrosion resistance test method |
| CN109828152B (en) * | 2019-01-28 | 2021-12-03 | 东莞市硅翔绝缘材料有限公司 | Automatic test equipment for battery heating plate |
| CN114413817B (en) * | 2022-03-29 | 2022-06-07 | 深圳市科扬自动化设备制造有限公司 | Carrier band thickness continuous detection equipment |
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2007
- 2007-04-27 CN CN200710011147A patent/CN100575862C/en not_active Expired - Fee Related
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| CN101046369A (en) | 2007-10-03 |
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