CN108598530B - Clamp and method for testing specific surface resistance of solid oxide fuel cell connector - Google Patents
Clamp and method for testing specific surface resistance of solid oxide fuel cell connector Download PDFInfo
- Publication number
- CN108598530B CN108598530B CN201810392542.6A CN201810392542A CN108598530B CN 108598530 B CN108598530 B CN 108598530B CN 201810392542 A CN201810392542 A CN 201810392542A CN 108598530 B CN108598530 B CN 108598530B
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- clamp
- connector
- wire
- fuel cell
- solid oxide
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 239000000446 fuel Substances 0.000 title claims abstract description 26
- 239000007787 solid Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title description 6
- 239000000956 alloy Substances 0.000 claims abstract description 33
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04634—Other electric variables, e.g. resistance or impedance
- H01M8/04649—Other electric variables, e.g. resistance or impedance of fuel cell stacks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Fuel Cell (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
Abstract
The invention provides a surface specific resistance test fixture of a solid oxide fuel cell connector, which comprises a connector fixture, a fixture outer tube and two wire guide tubes, wherein the connector fixture comprises two clamping plates, the clamping plates are provided with detection holes, metal nets are adhered to the detection holes of the two end surfaces of the two clamping plates, current collecting material layers are arranged on the two end surfaces of a connector alloy, the two clamping plates are connected through bolts and clamp the connector alloy, the connector fixture is arranged in the fixture outer tube, the two ends of the fixture outer tube are connected with flanges and sealed, the outer end surface of the flange is provided with air holes and wire guide holes, two Pt wires are penetrated into the wire guide tubes and are knotted and clamped at a tube opening to form a connecting part, and the two wire guide tubes are respectively inserted into the wire guide holes and the detection holes at the two sides of the connector fixture to enable the connecting part to be contacted with the metal nets. The invention has the beneficial effects that: the surface specific resistance test of the anode environment of the solid oxide fuel cell can be realized, the contact performance of the current collecting material layer and the connector alloy is improved, and the connector alloy with different specifications can be installed and tested.
Description
Technical Field
The invention relates to a solid oxide fuel cell, in particular to a fixture and a method for testing the specific surface resistance of a solid oxide fuel cell connector.
Background
Solid Oxide Fuel Cells (SOFCs) are electrochemical power generation devices that are efficient and clean, and metal connectors are one of the important components of SOFC stacks, and metal connectors have the advantages of higher electronic conductivity, low cost, easy processing, etc., and have gradually replaced ceramic connectors, however, in the process of preparing the stacks, the electrical performance of the stacks may be affected by the high specific area resistance (ASR) of the modified metal connectors, so reducing the contact resistance has become one of the main research contents for commercializing the SOFC stacks. The surface specific resistance of a metal interconnect is an important indicator of interconnect performance, directly affecting the performance of Solid Oxide Fuel Cells (SOFCs). The test fixture for the metal connectors needs to meet these basic conditions: good gas supply, reliable sealing, effective current collection, prevention of line short-circuit phenomenon, easy assembly, etc. The existing test fixture is limited to use of springs and baffles to fixedly clamp the connecting body sample, the fixture relies on elastic force of the springs to achieve good contact, poor contact is easy to generate, pressure is overlarge, stress is uneven, the fixture is easy to deform and crush at high temperature, and surface specific resistance test repeatability and stability are low.
Disclosure of Invention
In view of the foregoing, embodiments of the present invention provide a fixture and method for testing the specific surface resistance of a solid oxide fuel cell connector.
The embodiment of the invention provides a specific surface resistance test fixture of a solid oxide fuel cell connector, which comprises a connector fixture, a fixture outer tube and two wire guide tubes, wherein the connector fixture comprises two clamping plates which are oppositely arranged, each clamping plate is provided with a detection hole, metal nets are adhered to the detection holes on the two opposite end surfaces of the two clamping plates, current collecting material layers are arranged on the two end surfaces of a connector alloy, the connector alloy is arranged between the two clamping plates, the two clamping plates are connected by bolts and clamp the connector alloy, the connector fixture is arranged in the fixture outer tube and can slide, the two ends of the fixture outer tube are connected with flanges and sealed, the outer end surface of each flange is provided with an air hole and a wire guide hole, two Pt wires penetrate into the wire guide tubes and are knotted and clamped at one pipe opening to form a connecting part, and each wire guide tube is respectively inserted into the wire guide holes on the corresponding side in sequence on two sides of the connector fixture, so that the two connecting parts on each side are respectively contacted with the metal nets.
Further, the clamp further comprises an electric furnace, and the clamp outer tube is placed in the electric furnace.
Further, two ends of the outer tube of the clamp are sleeved with silica gel rings, and the silica gel rings are respectively inserted into the two flanges to be sealed.
Further, the clamp outer tube is a quartz glass tube.
Further, the conduit is a ceramic double-hole hollow pipe, and two holes of the ceramic double-hole hollow pipe respectively penetrate into one PT wire.
Further, the splint is made of ceramic.
The embodiment of the invention also provides a testing method using the testing clamp for the specific surface resistance of the solid oxide fuel cell connector, which comprises the following steps:
s1, continuously filling mixed gas of hydrogen and nitrogen and water vapor into the outer tube of the clamp through one air hole, discharging the mixed gas from the other air hole, and heating the outer tube of the clamp by the electric furnace;
S2, selecting one Pt wire in one wire conduit to be connected with one Pt wire in the other wire conduit to be connected with electricity, forming a loop, and connecting an ammeter in series in the loop to measure current;
s3, connecting the other two PT wires with a voltmeter to measure the voltages at two ends of the alloy of the connector;
and S4, calculating the resistance of the connector alloy according to ohm law, and calculating the surface specific resistance of the connector alloy according to a surface specific resistance calculation formula.
The technical scheme provided by the embodiment of the invention has the beneficial effects that: the surface specific resistance test fixture of the solid oxide fuel cell connector is sealed in the fixture outer tube, so that the surface specific resistance test of the solid oxide fuel cell anode environment can be realized, the connector alloy is clamped by the fixture bolt fastening fixture of the connector fixture, the contact performance of the current collecting material layer and the connector alloy is improved, and the connector alloys with different specifications can be installed and tested.
Drawings
FIG. 1 is a schematic illustration of a specific area resistance test fixture for a solid oxide fuel cell connector of the present invention;
Fig. 2 is a schematic view of the connector clamp 1 of fig. 1;
Fig. 3 is a schematic view of the clamping plate 9 of fig. 2;
fig. 4 is a schematic diagram of a test fixture for testing the specific surface resistance of a solid oxide fuel cell connector of the present invention.
In the figure: 1-connector clamp, 2-clamp outer tube, 3-flange, 4-air hole, 5-wire hole, 6-silica gel ring, 7-wire pipe, 8-electric stove, 9-splint, 10-bolt, 11-metal mesh, 12-connector alloy, 13-current collecting material layer, 14-detection hole, 15 screw holes.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 3, an embodiment of the present invention provides a specific surface resistance test fixture for a solid oxide fuel cell connector, including a connector fixture 1, a fixture outer tube 2 and two conduits 7, where the connector fixture 1 includes two clamping plates 9 disposed opposite to each other, the clamping plates 9 are made of ceramic, the clamping plates 9 are provided with detection holes 14, two opposite end surfaces of the clamping plates 9 are bonded with metal meshes 11 at the detection holes 14, two end surfaces of a connector alloy 12 are provided with current collecting material layers 13, the connector alloy 12 is placed between the two clamping plates 9, three threaded holes 15 are disposed on the clamping plates 9, and three bolts 10 are installed at the three threaded holes 15 to connect the two clamping plates 9 and clamp the connector alloy 12.
The connector fixture 1 is placed in the fixture outer tube 2 and can slide, the fixture outer tube 2 is a quartz glass tube, a connector alloy 12 in the tube can be directly observed, two ends of the fixture outer tube 2 are sleeved with silica gel rings 6, two flanges 3 are respectively inserted into the silica gel rings to be sealed, the outer end face of each flange 3 is provided with an air hole 4 and a wire guide 5, the wire guide 7 is a ceramic double-hole hollow tube, two holes of the ceramic double-hole hollow tube respectively penetrate into PT wires, and two holes are knotted and clamped at two holes to form connecting parts, and the two connecting parts at each side are respectively and sequentially inserted into the wire guide 5 and the detection hole 14 at the corresponding side of the wire guide 7 to respectively contact the two connecting parts at each side with the metal mesh 11.
The fixture further comprises an electric furnace 8, the fixture outer tube 2 is placed in the electric furnace 8, and the electric furnace 8 heats the connector fixture 1 and is used for simulating the anode reaction temperature of the solid oxide fuel cell.
Referring to the testing principle of the above device in fig. 4, the surface specific resistance test mainly adopts a four-point method, two surfaces of a sample of the connector alloy 12 are covered with a current collecting material layer 13 and a metal mesh 11, two Pt wires are led out from each metal mesh 11, and are respectively used for applying a constant current I and a measurement voltage V, and the two Pt wires are obtained according to ohm's law: 2 r=v/I, where R is the surface oxide resistance of the connector alloy 12, then the surface specific resistance asr=r×s, where S is the sample end surface area of the connector alloy 12.
The embodiment of the invention also provides a testing method using the testing clamp for the specific surface resistance of the solid oxide fuel cell connector, which comprises the following steps:
S1, continuously filling mixed gas of hydrogen and nitrogen and water vapor into the outer tube 2 of the clamp through one air hole 4, discharging the mixed gas from the other air hole 4, and heating the outer tube 2 of the clamp by the electric furnace 8 to realize the anode environment of the solid oxide fuel cell;
S2, selecting one Pt wire in one wire conduit to be connected with one Pt wire in the other wire conduit to be connected with electricity, forming a loop, and connecting an ammeter in series in the loop to measure current;
s3, connecting the other two PT wires with a voltmeter to measure the voltages at two ends of the alloy of the connector;
And S4, calculating the resistance of the connector alloy 12 according to ohm' S law, wherein the resistance of an oxide at one end face of the connector alloy 12 is half of the resistance of the connector alloy 12, and calculating the specific resistance of the surface by multiplying the area of the end face of the connector alloy 12.
In this document, terms such as front, rear, upper, lower, etc. are defined with respect to the positions of the components in the drawings and with respect to each other, for clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed application.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The utility model provides a solid oxide fuel cell connector's face specific resistance test fixture which characterized in that: the connecting body clamp comprises two clamping plates which are oppositely arranged, wherein the clamping plates are provided with detection holes, metal nets are adhered to the positions of the detection holes on the two opposite end surfaces of the clamping plates, current collecting material layers are arranged on the two end surfaces of the connecting body alloy, the connecting body alloy is placed between the two clamping plates, the two clamping plates are connected through bolts and clamp the connecting body alloy tightly, the connecting body clamp is placed in the outer pipe of the clamp and can slide, flanges are connected to the two ends of the outer pipe of the clamp and are sealed, air holes and wire holes are formed in the outer end surface of the flange, two Pt wires penetrate into the wire pipes and are knotted at one pipe opening to clamp the connecting parts, and each wire pipe is sequentially inserted into the wire hole and the detection hole on the corresponding side on two sides of the connecting body clamp so that the two connecting parts on each side are respectively contacted with the metal nets;
One Pt wire in the conduit is connected with one Pt wire in the other conduit to form a loop, a current meter is connected in series in the loop to measure the current, and the other two PT wires are connected with a voltmeter to measure the voltage at two ends of the alloy of the connector.
2. The solid oxide fuel cell connector surface specific resistance test fixture of claim 1, wherein: the clamp further comprises an electric furnace, and the clamp outer tube is placed in the electric furnace.
3. The solid oxide fuel cell connector surface specific resistance test fixture of claim 1, wherein: and two ends of the outer tube of the clamp are sleeved with silica gel rings which are respectively inserted into the two flanges to be sealed.
4. The solid oxide fuel cell connector surface specific resistance test fixture of claim 1, wherein: the outer tube of the clamp is a quartz glass tube.
5. The solid oxide fuel cell connector surface specific resistance test fixture of claim 1, wherein: the wire conduit is a ceramic double-hole hollow pipe, and two holes of the ceramic double-hole hollow pipe respectively penetrate into one PT wire.
6. The solid oxide fuel cell connector surface specific resistance test fixture of claim 1, wherein: the splint is made of ceramic.
7. A testing method using the solid oxide fuel cell connector of claim 2, characterized by comprising the steps of:
s1, continuously filling mixed gas of hydrogen and nitrogen and water vapor into the outer tube of the clamp through one air hole, discharging the mixed gas from the other air hole, and heating the outer tube of the clamp by the electric furnace;
S2, selecting one Pt wire in one wire conduit to be connected with one Pt wire in the other wire conduit to be connected with electricity, forming a loop, and connecting an ammeter in series in the loop to measure current;
s3, connecting the other two PT wires with a voltmeter to measure the voltages at two ends of the alloy of the connector;
and S4, calculating the resistance of the connector alloy according to ohm law, and calculating the surface specific resistance of the connector alloy according to a surface specific resistance calculation formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392542.6A CN108598530B (en) | 2018-04-27 | 2018-04-27 | Clamp and method for testing specific surface resistance of solid oxide fuel cell connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392542.6A CN108598530B (en) | 2018-04-27 | 2018-04-27 | Clamp and method for testing specific surface resistance of solid oxide fuel cell connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108598530A CN108598530A (en) | 2018-09-28 |
| CN108598530B true CN108598530B (en) | 2024-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810392542.6A Active CN108598530B (en) | 2018-04-27 | 2018-04-27 | Clamp and method for testing specific surface resistance of solid oxide fuel cell connector |
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| CN (1) | CN108598530B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117233502B (en) * | 2023-09-15 | 2024-05-14 | 华北电力大学 | Device and method for testing zoned connector of solid oxide battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866214A (en) * | 2016-03-29 | 2016-08-17 | 华中科技大学 | Electrochemical test clamp system of chromium poisoning effect of solid oxide fuel cell |
| CN208400952U (en) * | 2018-04-27 | 2019-01-18 | 中国地质大学（武汉） | The area specific resistance test fixture of solid-oxide fuel cell connector |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5275099B2 (en) * | 2009-03-24 | 2013-08-28 | パナソニック株式会社 | Hydrogen detection element and hydrogen detection sensor |
| CN205406637U (en) * | 2016-02-29 | 2016-07-27 | 华中科技大学 | Solid oxide fuel cell's electrochemistry test fixture |
| JP6888918B2 (en) * | 2016-03-31 | 2021-06-18 | 行政院原子能委員會核能研究所 | Solid oxide fuel cell test equipment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866214A (en) * | 2016-03-29 | 2016-08-17 | 华中科技大学 | Electrochemical test clamp system of chromium poisoning effect of solid oxide fuel cell |
| CN208400952U (en) * | 2018-04-27 | 2019-01-18 | 中国地质大学（武汉） | The area specific resistance test fixture of solid-oxide fuel cell connector |
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| CN108598530A (en) | 2018-09-28 |
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