CN220961165U - High-efficient fuel cell bipolar plate corrosion current test fixture - Google Patents
High-efficient fuel cell bipolar plate corrosion current test fixture Download PDFInfo
- Publication number
- CN220961165U CN220961165U CN202322834976.6U CN202322834976U CN220961165U CN 220961165 U CN220961165 U CN 220961165U CN 202322834976 U CN202322834976 U CN 202322834976U CN 220961165 U CN220961165 U CN 220961165U
- Authority
- CN
- China
- Prior art keywords
- groove
- pressing plate
- fuel cell
- bipolar plate
- corrosion current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 238000005260 corrosion Methods 0.000 title claims abstract description 39
- 230000007797 corrosion Effects 0.000 title claims abstract description 39
- 239000000446 fuel Substances 0.000 title claims abstract description 25
- 239000011148 porous material Substances 0.000 claims abstract description 26
- 239000004020 conductor Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000007772 electrode material Substances 0.000 abstract description 2
- 238000004445 quantitative analysis Methods 0.000 abstract description 2
- 238000004154 testing of material Methods 0.000 abstract description 2
- 238000012113 quantitative test Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The utility model discloses a high-efficiency fuel cell bipolar plate corrosion current testing clamp, and relates to the technical field of electrode material testing equipment. The upper end face of the upper pressing plate is provided with a plurality of holes in a penetrating mode, internal threads are arranged in any hole, a first groove is formed in any hole, the first groove is an annular groove, a sealing ring is placed in the groove, and an interval is reserved between every two holes in an oblique direction. The bottoms of the first grooves are communicated with the pore channels in a one-to-one correspondence manner, any pore channel is communicated with the second groove arranged on the upper pressing plate through the first groove, an O-shaped sealing ring is placed in the groove, the fourth groove is electrically connected with the electrochemical workstation through a conductor, and quantitative analysis and test are carried out on corrosion current of the bipolar plate of the fuel cell through the conductor.
Description
Technical Field
The utility model relates to the technical field of electrode material testing, in particular to a high-efficiency fuel cell bipolar plate corrosion current testing clamp.
Background
The fuel cell is an important way for efficiently utilizing hydrogen energy, and the proton exchange membrane fuel cell has the characteristics of high energy conversion rate, quick start in a low-temperature environment and the like, and gradually becomes the main stream in the research of the fuel cell. Bipolar plates are one of the most critical components of proton exchange membrane fuel cells, accounting for 60% -80% of the weight and 30% of the cost of the fuel cell. Because the fuel cell stack is internally provided with a high-temperature environment containing oxygen and having acidic pH, the bipolar plate faces serious corrosion problems in the long-term use process. Thus, the corrosion resistance of a bipolar plate is an important parameter for its performance characterization.
The test fixture on the market can only test a single bipolar plate sample, cannot test a plurality of bipolar plate samples at the same time, and if the corrosion current of different points on the same bipolar plate is required to be tested, the test time is greatly prolonged, the test efficiency is lowered, on the other hand, the traditional processing mode for testing the working electrode, namely the bipolar plate, adopts epoxy resin or silica gel to carry out insulation sealing on non-test parts, and exposes a certain area for testing. However, the effective area of the sealant is not easy to control by manually coating, the machine coating cost is high, high-temperature curing is generally required after the sealant is coated, and the effective test area of the bipolar plate after curing can be changed, so that the efficiency is low, and the market needs are difficult to meet.
Therefore, it is necessary to design a high-efficiency bipolar plate testing device, which can not only ensure that a plurality of samples are tested simultaneously, but also accurately determine the effective testing area of the bipolar plate.
Disclosure of utility model
Therefore, the utility model provides a high-efficiency fuel cell bipolar plate corrosion current testing clamp, which solves the problem of low testing efficiency caused by improper bipolar plate treatment mode in the prior art.
In order to achieve the above object, the present utility model provides the following technical solutions:
the utility model discloses a high-efficiency fuel cell bipolar plate corrosion current test fixture, which comprises:
The upper end face of the upper pressing plate is provided with a plurality of pore passages in a penetrating way, any pore passage is internally provided with internal threads and is provided with a first groove, the bottom of the first groove is communicated with the pore passages, and any pore passage is communicated with a second groove arranged on the upper pressing plate through the first groove;
The upper end of the conductive piece is provided with a plurality of third grooves, and the third grooves are in one-to-one correspondence with the second grooves;
And the middle part of the lower pressing plate is provided with a fourth groove, and the fourth groove is electrically connected with the electrochemical workstation through a conductor. When the clamp provided with the electrode plate sample to be tested is placed in the corrosion pool to serve as a working electrode, the reference electrode and the auxiliary electrode form a three-electrode system structure, corrosion performance test of the sample can be carried out, and a certain number of pore channels are immersed for test according to test requirements.
In a specific embodiment, the upper pressing plate, the conductive piece and the lower pressing plate are all round cake-shaped, and the pore canal is circumferentially arranged along the center of the upper pressing plate.
Further, optionally, the upper pressing plate, the conductive member and the lower pressing plate are all elongated, and the plurality of holes are uniformly arranged along the length direction of the upper pressing plate.
In one embodiment, the tunnel is provided with a screw cap adapted to mate with an internal screw thread.
In one embodiment, the conductive member is made of corrosion-resistant stainless steel.
In one embodiment, the upper platen, the first recess, and the lower platen are secured together by fasteners.
In a specific embodiment, the first groove and the second groove are each provided with a sealing ring.
In a specific embodiment, the upper pressing plate, the conductive member, the lower pressing plate and the screw cap are made of polytetrafluoroethylene.
In one specific embodiment, a handle is arranged outside the lower pressing plate, and the conductor is arranged in the handle.
The utility model has the following advantages:
1. compared with the existing testing device, the utility model can test a plurality of samples, such as a plurality of different positions of a whole bipolar plate or a plurality of bipolar plate samples, and the test is equivalent to the test for a plurality of times, thereby saving the test time, greatly improving the test efficiency and reducing the error caused by less sampling.
2. Compared with the test result of the bipolar plate subjected to the traditional seal gluing treatment, the high-efficiency fuel cell bipolar plate corrosion current test fixture provided by the utility model can be used for quickly and effectively sealing the bipolar plate with the flow channel, saves the glue sealing pretreatment time, can control the test area, improves the standardization degree of electrode plate measurement, and avoids the problems of low test efficiency and inaccuracy caused by introducing the seal glue into a test system.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the utility model, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present utility model, should fall within the ambit of the technical disclosure.
FIG. 1 is a perspective view of a bipolar plate corrosion current test fixture for a high efficiency fuel cell provided by the present utility model;
FIG. 2 is a perspective view of a lower platen provided by the present utility model;
FIG. 3 is a perspective view of a conductive member according to the present utility model;
FIG. 4 is a perspective view of an upper platen provided by the present utility model;
FIG. 5 is a schematic view of an elongated clip according to the present utility model;
In the figure: 1, an upper pressing plate; 2 pore canals; 3 a first groove; 4 a second groove; 5 conductive members; 6 a third groove; 7, pressing down the plate; 8, a fourth groove; 9, a spiral cover; 10 conductors.
Detailed Description
Other advantages and advantages of the present utility model will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
1-5, The utility model discloses a high-efficiency fuel cell bipolar plate corrosion current test fixture, wherein the test fixture can effectively clamp a cell bipolar plate, and a certain area of exposure part is immersed into electrolyte, and in an acidic F-containing high-temperature environment, a three-electrode system test mode is adopted, an external dynamic potential or a constant potential is adopted to test the corrosion current, and the corrosion current reflects the corrosion rate of the bipolar plate. The specific structure comprises an upper pressing plate 1, a first groove 3, a conductive piece 5 and a lower pressing plate 7. The upper end face of the upper pressing plate 1 is provided with a plurality of pore channels 2 in a penetrating manner, any pore channel 2 is internally provided with internal threads, a first groove 3 is formed in the pore channel 2, the inner diameter of the first groove 3 is the total measurement area of the bipolar plate, the first groove 3 is an annular groove, a 0-shaped sealing ring is placed in the groove, the inner diameter of the first groove 3 is 1.13cm, the interval between every two pore channels in the oblique direction is 0.15cm, and namely the total measurement area of the bipolar plate is 5cm 2. In this embodiment, the bottoms of the first grooves 3 are all communicated with the plurality of channels 2 and are in one-to-one correspondence, and any one channel 2 is communicated with the second groove 4 arranged on the upper pressing plate 1 through the first groove 3. The edge of the second groove 4 is spaced 0.15cm from the straight line direction of the pore canal, the second groove 4 is also an annular groove, the first groove 3 and the second groove 4 are both provided with o-shaped sealing rings, and the inner diameter of the second groove 4 is 3.99cm.
In this embodiment, as shown in fig. 1 and 3, the upper end of the conductive member 5 is provided with a plurality of third grooves 6, and the third grooves 6 are in one-to-one correspondence with the second grooves 4, for fixing the bipolar plate sample, while the middle part of the lower pressure plate 7 is provided with a fourth groove 8, specifically, the fourth groove 8 is an annular groove for placing the conductive member 5, the fourth groove 8 is electrically connected with the electrochemical workstation through a conductor 10, and the conductor 10 is a copper alloy sheet, and is led out through a long handle copper bar, so that current charges can be effectively collected through the metal sheet, and data analysis of current and electricity quantity is performed through the electrochemical workstation, thereby obtaining the test result of the electrode sheet.
In some embodiments, the upper platen 1, the conductive member 5 and the lower platen 7 are in the shape of a circular cake, the hole channels 2 are circumferentially arranged along the center of the upper platen 1, and a screw cap 9 adapted to be engaged with the internal screw thread is further installed on the hole channels 2. In a specific operation, a part of the pore channels 2 can be blocked by the spiral cover 9, so that electrochemical reaction between electrodes in the pore channels 2 and electrolyte is avoided, and quantitative analysis is performed on different electrode plates.
For example, in this embodiment, a user may test multiple bipolar plate samples by assembling the screw cap 9. The first groove 3 can be used for accommodating samples on different bipolar plates, and six pore canal 2 clamps are taken as an example, three bipolar plate samples are assembled by the clamps, and in order to test accurately, two different positions are randomly taken for each bipolar plate, and the total six samples are taken, so that the measurement area is 6cm 2. The user assembles the sample, connects electrochemical workstation and tests, need not add screw cap 9 when first test, if the corrosion current of calculating accords with the standard, indicates that the corrosion resistance of three bipolar plate is all up to standard, if do not accord with corrosion current standard or want the corrosion current of specifically calculating a bipolar plate sample, can realize through screwing screw cap 9. If one of the three bipolar plates is to be tested for corrosion current, the screw cap 9 can be used to cap the other four channels 2 (at this time the test area is 2cm 2) to obtain a single bipolar plate corrosion current.
In some embodiments, the conductive member 5 is made of corrosion resistant stainless steel.
In some embodiments, as shown in fig. 4, the upper platen 1, the first recess 3 and the lower platen 7 are fixed together by fasteners, wherein the fasteners may be bolts, epoxy or silicone or quick clamps, as specifically described.
In an alternative technical scheme, as shown in fig. 5, the upper pressing plate 1, the conductive member 5 and the lower pressing plate 7 are all in a strip shape, and the plurality of pore channels 2 are uniformly arranged along the length direction of the upper pressing plate 1, and in actual test, the corrosion condition of different electrode plates can be quantitatively analyzed by adjusting the number of the immersed electrolyte of the pore channels 2, and a single bipolar plate corrosion current is not required to be obtained by plugging the pore channels 2, so that the test convenience is improved.
Further, the upper pressing plate 1, the conductive member 5, the lower pressing plate 7 and the screw cap 9 are made of polytetrafluoroethylene, so that corrosion caused by electrolyte is avoided.
Further, as shown in fig. 2, a handle is arranged at the outer side of the lower pressure plate 7, the conductor 10 is arranged in the handle, and in use, the mechanical arm can be connected with the handle so as to facilitate the complete entering of the clamp into the electrolyte, and simultaneously, the conductor 10 is prevented from being corroded.
While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.
Claims (9)
1. A high efficiency fuel cell bipolar plate corrosion current test fixture, comprising:
an upper pressing plate (1), wherein the upper end surface is provided with a plurality of pore channels (2) in a penetrating way, and any pore channel (2) is internally provided with internal threads and is provided with
The bottom of the first groove (3) is communicated with a plurality of pore channels (2), and any pore channel (2) is communicated with a second groove (4) arranged on the upper pressing plate (1) through the first groove (3);
the upper end of the conductive piece (5) is provided with a plurality of third grooves (6), and the third grooves (6) are in one-to-one correspondence with the second grooves (4);
and a lower pressing plate (7), wherein a fourth groove (8) is formed in the middle of the lower pressing plate, and the fourth groove (8) is electrically connected with the electrochemical workstation through a conductor (10).
2. The high-efficiency fuel cell bipolar plate corrosion current testing fixture according to claim 1, wherein the upper pressing plate (1), the conductive piece (5) and the lower pressing plate (7) are all round cake-shaped, and the pore channels (2) are circumferentially arranged along the center of the upper pressing plate (1).
3. A high efficiency fuel cell bipolar plate corrosion current testing fixture according to claim 1, wherein said port (2) is provided with a screw cap (9) adapted to mate with an internal screw thread.
4. The high-efficiency fuel cell bipolar plate corrosion current testing fixture according to claim 1, wherein the conductive member (5) is made of corrosion-resistant stainless steel.
5. The high efficiency fuel cell bipolar plate corrosion current test fixture according to claim 1, wherein the upper platen (1), the first groove (3) and the lower platen (7) are fastened together by fasteners.
6. The high efficiency fuel cell bipolar plate corrosion current test fixture according to claim 1, wherein the first groove (3) and the second groove (4) are each provided with a sealing ring.
7. The high-efficiency fuel cell bipolar plate corrosion current testing fixture according to claim 1, wherein the upper pressing plate (1), the conductive piece (5) and the lower pressing plate (7) are all long-strip-shaped, and a plurality of pore channels (2) are uniformly distributed along the length direction of the upper pressing plate (1).
8. The high-efficiency fuel cell bipolar plate corrosion current testing fixture according to claim 1, wherein the upper pressing plate (1), the conductive piece (5), the lower pressing plate (7) and the spiral cover (9) are made of polytetrafluoroethylene.
9. The high-efficiency fuel cell bipolar plate corrosion current testing fixture according to claim 1, wherein a handle is arranged outside the lower pressure plate (7), and the conductor is arranged in the handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322834976.6U CN220961165U (en) | 2023-10-23 | 2023-10-23 | High-efficient fuel cell bipolar plate corrosion current test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322834976.6U CN220961165U (en) | 2023-10-23 | 2023-10-23 | High-efficient fuel cell bipolar plate corrosion current test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220961165U true CN220961165U (en) | 2024-05-14 |
Family
ID=91007748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322834976.6U Active CN220961165U (en) | 2023-10-23 | 2023-10-23 | High-efficient fuel cell bipolar plate corrosion current test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220961165U (en) |
-
2023
- 2023-10-23 CN CN202322834976.6U patent/CN220961165U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI427308B (en) | Testing device for solid oxide fuel cell | |
| CN100420081C (en) | Separated area current detecting system for proton exchange film fuel cell | |
| CN110137555B (en) | Fuel cell stack assembling method | |
| CN112798513A (en) | Accelerated test method for durability of metal bipolar plate of proton exchange membrane fuel cell | |
| CN113793944A (en) | Fuel cell clamp and testing device | |
| CN111628199B (en) | Sectional type fuel cell fixture | |
| CN220961165U (en) | High-efficient fuel cell bipolar plate corrosion current test fixture | |
| CN218905041U (en) | Fuel cell bipolar plate corrosion resistance test fixture | |
| CN219162201U (en) | Test fixture | |
| CN216847410U (en) | Electrochemical corrosion resistance testing device for metal bipolar plate of proton exchange membrane fuel cell | |
| CN215005526U (en) | Clamp splice subassembly and fuel cell monolithic test fixture | |
| CN114944501B (en) | Device for testing regional performance of plate-type SOFC (solid oxide Fuel cell) and assembly method and testing method thereof | |
| CN109682405A (en) | A kind of membrane electrode test device | |
| CN111272855B (en) | Testing device for single electrode electrochemical test under fuel cell working state | |
| CN217359716U (en) | Testing arrangement of porous cathode's electro-catalytic performance | |
| JP2017147122A (en) | Holder for electrochemical cell evaluation | |
| CN116183969A (en) | Test fixture | |
| CN100369313C (en) | Proton exchange membrane fuel cell stack | |
| CN209296016U (en) | A kind of membrane electrode test device | |
| CN214409059U (en) | Test fixture of bipolar plate | |
| CN112051308B (en) | Ion conductivity measuring clamp and measuring method for solid/liquid electrolyte | |
| CN2879440Y (en) | Proton exchanging film fuel cell pile | |
| CN220508985U (en) | Fuel cell test fixture | |
| CN113386062A (en) | Electrochemistry test fixture | |
| CN221426727U (en) | Single cell test fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |