CN107966249B - MEA detects anchor clamps - Google Patents
MEA detects anchor clamps Download PDFInfo
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- CN107966249B CN107966249B CN201711456046.4A CN201711456046A CN107966249B CN 107966249 B CN107966249 B CN 107966249B CN 201711456046 A CN201711456046 A CN 201711456046A CN 107966249 B CN107966249 B CN 107966249B
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- pressing plate
- inlet
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- 238000001514 detection method Methods 0.000 claims abstract description 78
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 44
- 239000001257 hydrogen Substances 0.000 claims description 43
- 229910052739 hydrogen Inorganic materials 0.000 claims description 43
- 239000007789 gas Substances 0.000 claims description 39
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 38
- 239000001301 oxygen Substances 0.000 claims description 38
- 229910052760 oxygen Inorganic materials 0.000 claims description 38
- 238000003825 pressing Methods 0.000 claims description 28
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 238000007689 inspection Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 11
- 239000000306 component Substances 0.000 description 10
- 239000000470 constituent Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000005587 bubbling Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
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- 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
Abstract
The invention provides an MEA detection clamp. The MEA detection clamp is suitable for simultaneous detection of a plurality of MEAs, the bipolar plate is pre-installed on the detection clamp, and the clamp is provided with a positioning device, so that the MEA is very convenient to mount and position. When a plurality of pieces are detected, the MEA detection clamp can simulate the real assembly state of the fuel cell; when the detection is finished, the bipolar plate of the MEA detection clamp can be automatically opened, and the MEA is very convenient to take out. The detection is convenient and quick, and the detection requirement of commercial production can be met.
Description
Technical Field
The invention relates to the technical field of fuel cell side leakage, in particular to an MEA detection clamp.
Background
The fuel cell is a power generation device for directly converting chemical energy existing in fuel and oxidant into electric energy, and has the advantages of high power density, high energy conversion rate, zero pollution, zero noise and sufficient fuel.
Bipolar plates in fuel cells serve as current collecting, conducting and mechanical support, and MEAs are the most critical core components of the fuel cell where the redox reactions of the fuel cell occur. The MEA has the functions of isolating gas and exchanging protons. In order to ensure the safe operation of the fuel cell, the MEA must be subjected to gas leakage detection before the cell is assembled, and the stack must be subjected to gas leakage detection after the cell is assembled, so as to prevent explosion caused by direct mixing of hydrogen and oxygen.
At present, most of the air leakage detection of MEA is in simulation of single-chip assembly state detection, the simulation of the assembly state detection of a plurality of MEA can not be carried out together, the operation of a device for individually carrying out the multi-chip detection on the MEA is complex, the defects of inaccurate assembly and positioning and complex disassembly of the MEA exist at the same time, and the requirements of high detection speed, accurate detection and convenient operation in commercial production can not be met.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to overcome the defects of the prior art, and provide an MEA detection fixture, which comprises a base, a pressing plate, a telescopic member, a plurality of bipolar plates arranged between the base and the pressing plate, a positioning guide rod mounted on the base, and a driving device that is abutted with the pressing plate and pushes the pressing plate to move towards the bipolar plates;
the telescoping member connects adjacent said bipolar plates and is used to connect said bipolar plates adjacent said compression plates and said compression plates;
the positioning guide rod penetrates through the pressing plate and is sleeved with the bipolar plate;
one surface of the bipolar plate is a cathode runner, and the other surface of the bipolar plate is an anode runner;
one end of the pressing plate is provided with a hydrogen inlet and an oxygen outlet corresponding to the cathode of the bipolar plate, and the other end of the pressing plate is provided with an oxygen inlet and a hydrogen outlet corresponding to the anode of the bipolar plate;
during detection, a plurality of MEAs are placed between adjacent bipolar plates, the driving device pushes the pressing plate, the hydrogen outlet is closed, gas is introduced from the hydrogen inlet, and the oxygen outlet and the oxygen inlet are opened to detect whether gas leakage exists or not, so that whether the MEAs leak gas or not is judged;
when the oxygen outlet and inlet detect gas, the hydrogen and oxygen leakage is indicated, namely the MEA leakage cannot be used for producing a galvanic pile.
In certain embodiments, the bipolar plate is provided with channels that open laterally into the flow field.
In certain embodiments, a pressure detection device is also included that is interposed between the drive device and the platen.
In certain embodiments, the pressure detection device is a pressure sensor;
after the pressure reached the assembly pressure of 100PSI, gas was introduced at 0.2MPa pressure from the hydrogen inlet.
In some embodiments, the device further comprises a gas pipe communicated with the hydrogen outlet and inlet and the oxygen inlet and outlet; the air pipes are provided with switch valves.
In some embodiments, the hydrogen inlet is provided with a quick connector; the quick connector is connected with the gas pipe of the hydrogen inlet and the switch valve;
during detection, a plurality of MEAs are placed between adjacent bipolar plates, the driving device pushes the pressing plate, the hydrogen outlet is closed, and gas is introduced from the quick connector of the hydrogen inlet.
In certain embodiments, the base, the pressure plate, and the bipolar plate are each provided with a seal ring.
In some embodiments, the telescoping component is any one of a conical compression spring, a linkage, a flexible rope, a compression sponge.
In some embodiments, the driving device is any one of a servo electric cylinder, a cylinder and an oil cylinder.
In certain embodiments, the positioning guide is tangential to the outer edge of the MEA.
Compared with the prior art, the MEA detection clamp provided by the invention has the beneficial effects that: in the prior art, most of MEA detection and assembly are single-chip detection, and the clamp can only simulate the single-chip MEA assembly state. The prior art has the advantages that few technologies can be used for detecting leakage of the MEA simultaneously, when a plurality of MEA detection is carried out, the prior clamp is required to be provided with the bipolar plates matched with the MEA, and no positioning device is arranged on the prior clamp, namely, the prior art bipolar plates are not arranged on the detection clamp in advance, when the leakage detection of the plurality of MEA is carried out simultaneously, the bipolar plates are required to be assembled first to reassemble the MEA, the operation is complex, and when the detection is finished, the bipolar plate plates are required to be separated manually and then the MEA is taken out.
The MEA detection clamp provided by the invention is suitable for simultaneous detection of a plurality of MEAs, the bipolar plate is pre-installed on the detection clamp, and the clamp is provided with the positioning device, so that the MEA is very convenient to place and position. When a plurality of pieces are detected, the MEA detection clamp can simulate the real assembly state of the fuel cell; when the detection is finished, the bipolar plate of the MEA detection clamp can be automatically opened, and the MEA is very convenient to take out. The detection is convenient and quick, and the detection requirement of commercial production can be met.
Based on this structure, this kind of MEA detects anchor clamps, during the implementation, install the location guide arm on the base, bipolar plate inlay the cover on the location guide arm, the location guide arm runs through the clamp plate, installs flexible part between bipolar plate and the bipolar plate, can realize compressing tightly under clamp plate pressure effect and close. When the pressure plate is decompressed, the bipolar plate is automatically separated under the action of the telescopic component, so that the MEA to be measured can be conveniently put in and taken out.
During detection, a plurality of MEAs are respectively placed in the middle of the bipolar plate, and the driving device is controlled to press the pressing plate.
Preferably, a pressure sensor is arranged at the pressure plate.
Preferably, after the pressure sensor reaches the assembly pressure of 100PSI, gas is introduced from the platen hydrogen inlet, then the hydrogen outlet is closed, and the oxygen inlet and outlet are opened.
It can be understood that the bubbling method can be used for detecting whether the oxygen inlet and outlet have gas leakage or not by being inserted into water, and the leakage amount can be quantitatively detected by connecting the oxygen inlet and outlet with a gas flowmeter.
The judgment standard is as follows: when the hydrogen inlet is filled with gas and the hydrogen outlet is closed, the oxygen inlet and the oxygen outlet are connected into water, if bubbles are detected at the oxygen outlet or the oxygen inlet, the oxyhydrogen leakage is indicated, the damage of the MEA or the packaging problem is indicated, namely the MEA leakage cannot be used for producing a galvanic pile.
Therefore, the bipolar plate is not required to be installed when the MEA detection clamp is used for detecting the leakage of the MEA, and the operation complexity of detecting the leakage is greatly simplified.
And the telescopic parts are arranged between the bipolar plates, so that good sealing can be realized by compression under the pressure-applying state, and the bipolar plates can be automatically separated under the action of the telescopic parts under the pressure-releasing state, so that the placement and the taking out of the MEA are facilitated.
Meanwhile, the bipolar plate is designed to be one cathode and one anode, so that two bipolar plates can be replaced during leak detection, a testing device is simplified, and the assembly condition of the MEA in a galvanic pile can be truly simulated.
Preferably, each surface of the bipolar plate is provided with a channel which transversely leads to a flow field, so that the assembly state of the MEA during the installation of a real electric pile can be completely simulated.
Preferably, the installation position of the positioning guide rod is tangential to the outer edge of the MEA, so that the positioning guide rod can play a role in assembly and positioning, namely, the positioning guide rod plays a role in positioning and guiding.
Preferably, the MEA detection clamp can realize simultaneous leakage detection of a plurality of MEAs at a time, and each gas inlet and outlet is provided with a switch valve, so that the operation of the passage and disconnection of each pipeline can be very convenient when the bubbling method detection is carried out.
Preferably, the driving device is a servo electric cylinder, and the servo electric cylinder can realize very accurate displacement and force control by matching with a pressure sensor, so that compared with a traditional cylinder, the controllability of the servo electric cylinder is incomparable with that of the cylinder, and the operation precision is greatly improved.
Preferably, when detecting that the air leakage MEA exists in the batch of MEA, the number of detection fragments of the MEA can be halved by halving, and an integrated air-isolating film with an opening is assembled in the middle of a bipolar plate without the MEA to serve as a false MEA to search for the air leakage MEA, or the air leakage of the replaced MEA can be indicated by replacing the MEA at different positions with the integrated air-isolating film with the opening serving as the false MEA and then carrying out the leakage detection again if the air leakage phenomenon does not occur after the replacement with the false MEA. The method can more quickly and accurately find out the air leakage MEA.
In a word, this MEA detects anchor clamps convenient to use, structural stability is good, easily operation. The detection of a plurality of MEAs can be realized quickly and conveniently, and the MEAs can be taken out after the detection. Greatly improves the convenience of operation. More meets the requirements in the practical application process.
In summary, the structure and the operation method of the MEA detection fixture provided by the present invention have the advantages and values described above, and the similar method is not disclosed or used in similar products, which is an innovation, and a good and practical effect is produced.
Drawings
It is to be understood that the following drawings illustrate only certain embodiments of the invention and are therefore not to be considered limiting of its scope, for the person of ordinary skill in the art may admit to other equally relevant drawings without inventive effort.
FIG. 1 is an oblique top view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is an enlarged view of B in FIG. 2;
FIG. 4 is a top view of the present invention;
fig. 5 is a front view of a bipolar plate of the particular design of the present invention;
fig. 6 is a rear view of a specially designed bipolar plate of the present invention;
FIG. 7 is a diagram of another embodiment of the present invention employing a rope connection;
FIG. 8 is an enlarged view of A in FIG. 7;
FIG. 9 is a diagram of another embodiment of the present invention employing a linkage;
fig. 10 is an enlarged view of C in fig. 9.
Reference numerals:
Detailed Description
Hereinafter, various embodiments of the present disclosure will be described more fully with reference to the accompanying drawings. The present disclosure is capable of various embodiments and of modifications and variations therein. Accordingly, the present disclosure will be described in more detail with reference to specific embodiments thereof shown in the drawings. However, it should be understood that: there is no intention to limit the various embodiments of the disclosure to the specific embodiments disclosed herein, but rather the disclosure is to be interpreted to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the disclosure. Like reference numerals designate like elements throughout the description in connection with the accompanying drawings.
Hereinafter, the terms "comprises" or "comprising" as may be used in various embodiments of the present disclosure indicate the presence of the disclosed functions, operations or elements, and are not limiting of the addition of one or more functions, operations or elements.
In various embodiments of the present disclosure, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B or may include both a and B.
Expressions (such as "first", "second", etc.) used in the various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but the respective constituent elements may not be limited. For example, the above description does not limit the order and/or importance of the elements. The above description is only intended to distinguish one element from another element. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present disclosure.
It should be noted that: if it is described to "connect" one component element to another component element, a first component element may be directly connected to a second component element, and a third component element may be "connected" between the first and second component elements. Conversely, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the disclosure. As used herein, the singular is intended to include the plural as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of this disclosure belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having a meaning that is the same as the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in the various embodiments of the disclosure.
Referring to fig. 1 to 10, in some embodiments of the present invention, an MEA inspection fixture 1 includes a base 11, a platen 12, a telescoping member, a plurality of bipolar plates 14 disposed between the base 11 and the platen 12, positioning guide rods 15 mounted to the base 11, and a drive device 16 that abuts the platen 12 and urges the platen 12 toward the bipolar plates 14;
the telescoping member connects adjacent the bipolar plate 14 and is used to connect the bipolar plate 14 adjacent the platen 12 and the platen 12;
the positioning guide rod 15 penetrates through the pressing plate 12 and is sleeved with the bipolar plate 14;
one surface of the bipolar plate 14 is a cathode runner, and the other surface is an anode runner;
one end of the pressure plate 12 is provided with a hydrogen inlet and an oxygen outlet corresponding to the cathode of the bipolar plate 14, and the other end is provided with an oxygen inlet and a hydrogen outlet corresponding to the anode of the bipolar plate 14;
during detection, a plurality of MEAs are placed between the adjacent bipolar plates 14, the driving device 16 pushes the pressing plate 12, closes the hydrogen outlet, introduces gas from the hydrogen inlet, and simultaneously opens the oxygen outlet and inlet to detect whether gas leakage exists or not, so as to judge whether the MEAs leak gas or not;
when the oxygen outlet and inlet detect gas, the hydrogen and oxygen leakage is indicated, namely the MEA leakage cannot be used for producing a galvanic pile.
In the foregoing, it can be understood that most of the prior art is single-chip detection during MEA detection assembly, and the fixture can only simulate the single-chip MEA assembly state. The prior art has the problems that few technologies can be used for detecting the leak of the MEA at the same time, when a plurality of MEA detection is carried out, the prior fixture needs to be provided with the bipolar plate 14 matched with the MEA at first and has no positioning device, namely, the prior art bipolar plate 14 is not pre-arranged on the detection fixture, when the leak detection of a plurality of MEA is carried out at the same time, the bipolar plate 14 needs to be assembled at first to be assembled and the MEA is assembled again, the operation is complex, and when the detection is finished, the bipolar plate 14 needs to be manually separated and then the MEA is taken out.
The MEA detection clamp 1 provided by the invention is suitable for simultaneous detection of a plurality of MEAs, the bipolar plate 14 is pre-installed on the detection clamp, and the clamp is provided with a positioning device, so that the MEA is very convenient to place and position. When a plurality of pieces are detected, the MEA detection clamp 1 can simulate the real assembly state of the fuel cell; when the detection is finished, the bipolar plate 14 of the MEA detection clamp 1 can be automatically opened, and the MEA is quite convenient to take out. The detection is convenient and quick, and the detection requirement of commercial production can be met.
Based on this structure, this kind of MEA detects anchor clamps 1, during the implementation, install location guide arm 15 on the base 11, bipolar plate 14 inlay the cover on location guide arm 15, location guide arm 15 runs through clamp plate 12, installs the telescopic part between bipolar plate 14 and the bipolar plate 14, can realize compressing tightly under clamp plate 12 pressure effect and close. When the pressure plate 12 is depressurized, the bipolar plate 14 is automatically separated under the action of the telescopic component, so that the MEA to be tested can be conveniently put in and taken out.
In the detection, a plurality of MEAs are respectively placed in the middle of the bipolar plate 14, and the driving device 16 is controlled to press the pressing plate 12.
Gas is introduced from the hydrogen inlet of the platen 12, then the hydrogen outlet is closed, and the oxygen inlet and outlet are opened.
It can be understood that the bubbling method can be used for detecting whether the oxygen inlet and outlet have gas leakage or not by being inserted into water, and the leakage amount can be quantitatively detected by connecting the oxygen inlet and outlet with a gas flowmeter.
The judgment standard is as follows: when the hydrogen inlet is filled with gas and the hydrogen outlet is closed, the oxygen inlet and the oxygen outlet are connected into water, if bubbles are detected at the oxygen outlet or the oxygen inlet, the oxyhydrogen leakage is indicated, the damage of the MEA or the packaging problem is indicated, namely the MEA leakage cannot be used for producing a galvanic pile.
Preferably, the judgment criteria are: when the hydrogen inlet is filled with gas and the hydrogen outlet is closed, the oxygen inlet is connected into water, if bubbles are detected at the oxygen outlet or the oxygen inlet, the oxyhydrogen leakage is indicated, namely, the leaked MEA exists in the batch of MEA, at the moment, the number of detection pieces of the MEA can be halved by a bisection method, an open integrated gas-barrier film is assembled in the middle of a bipolar plate without the MEA to serve as a false MEA to find the leaked MEA, or the open integrated gas-barrier film is used as the false MEA to replace the MEA at different positions, then leakage detection is carried out again, if the phenomenon of leakage does not occur after the replacement of the false MEA, the phenomenon of leakage of the replaced MEA is indicated, and the breakage or the packaging problem of the MEA is indicated, namely, the leakage of the MEA cannot be used for producing a galvanic pile.
Therefore, the bipolar plate 14 is not required to be installed when the MEA detection clamp 1 is used for detecting the leakage of the MEA, and the operation complexity of the leakage detection is greatly simplified.
And, install flexible part between each bipolar plate 14, can compress under the pressurized state and realize good sealing, bipolar plate 14 can be under flexible part's effect automatic separation under the pressure release state, make things convenient for the placement and the takeout of MEA.
Meanwhile, the bipolar plate 14 is designed to be a cathode and an anode, so that two bipolar plates 14 can be replaced during leak detection, a testing device is simplified, and the assembly condition of the MEA in a galvanic pile can be truly simulated.
It will be appreciated that the MEA inspection fixture 1 may also include a top plate for securing the drive means 16 disposed above the platen 12.
In some embodiments of the invention, the bipolar plate 14 is provided with channels that open laterally into the flow field.
From the foregoing, it will be appreciated that bipolar plates 14 of this design can fully simulate the MEA's assembled state when a real stack is installed.
In some embodiments of the invention, a pressure detection device 17 is also included interposed between the drive device 16 and the platen 12.
In some embodiments of the invention, the pressure detecting device 17 is a pressure sensor;
after the pressure reached the assembly pressure of 100PSI, gas was introduced at 0.2MPa pressure from the hydrogen inlet.
In some embodiments of the invention, a gas pipe 18 is also included in communication with the hydrogen outlet and inlet and the oxygen inlet and outlet; the air pipes 18 are provided with on-off valves 181.
In some embodiments of the present invention, the hydrogen inlet is provided with a quick connector 121; the quick connector 121 connects the gas pipe 18 of the hydrogen gas inlet and the switch valve 181;
during detection, a plurality of MEAs are placed between adjacent bipolar plates 14, the driving device 16 pushes the pressing plate 12 to close the hydrogen outlet, and gas is introduced from the quick connector 121 of the hydrogen inlet.
As can be appreciated from the foregoing, the MEA inspection jig 1 can realize simultaneous leak detection of a plurality of MEAs at a time, and each gas inlet and outlet is provided with the switch valve 181, so that the operation of the passage and disconnection of each pipe can be very convenient when the bubbling inspection is performed.
In some embodiments of the present invention, the base 11, the pressing plate 12, and the bipolar plate 14 are provided with sealing rings 19.
In some embodiments of the present invention, the telescopic member is any one of a conical compression spring 13a, a link mechanism 13b, a flexible rope 13c, and a compression sponge.
As described above, fig. 7 is an alternative of the present embodiment, in which the conical compression springs 13a installed in the middle of each bipolar plate 14 are replaced by flexible ropes 13c, that is, the edges of each bipolar plate 14 are sequentially connected by the flexible ropes 13c, the connection parts of the flexible ropes 13c of the bipolar plates 14 are processed to form sinking tables and drilled holes are convenient for the connection of the flexible ropes 13c, and the bipolar plate 14 at the top is connected with the pressing plate 12 by the flexible ropes 13 c. When the pressing plate 12 is lifted, the flexible ropes 13c can sequentially pull up the bipolar plates 14, so that the bipolar plates 14 can be automatically separated.
Fig. 9 shows an alternative of the present embodiment, in which 13b1 is a connecting rod 13b1, and 13b2 is a pin 13b2. In the scheme, the conical compression springs 13a arranged in the middle of each bipolar plate 14 are replaced by the connecting rod mechanisms 13b, namely, the connecting rods 13b1 are used for connecting each bipolar plate 14, the connecting rod mechanisms 13b can be folded when the bipolar plates 14 are attached, and when the bipolar plates 14 are decompressed, the bipolar plates 14 at the top are pulled by the connecting rods 13b1 to be connected with the bipolar plates 14, namely, the connecting rod mechanisms 13b can realize sequential automatic separation of the bipolar plates 14.
Furthermore, another alternative is to replace the conical compression springs 13a mounted between the respective bipolar plates 14 with compressed sponges, the peripheral areas of the bipolar plates 14 being machined to sink to accommodate the compressed volume of the sponges. The bipolar plates 14 automatically separate under the force of the sponge spring back when the pressure plate 12 is depressurized.
In some embodiments of the present invention, the driving device 16 is any one of a servo electric cylinder, a gas cylinder, and an oil cylinder.
In the foregoing, it will be appreciated that the drive means 16 is preferably a servo-actuated cylinder, with the cooperation of a pressure sensor, providing very accurate displacement and force control, and that the servo-actuated cylinder is of comparable controllability to conventional cylinders, and that the accuracy of operation is greatly improved.
In some embodiments of the invention, the positioning guide 15 is tangential to the outer edge of the MEA.
It will be appreciated that the positioning guide 15 is tangential to the outer edge of the MEA to provide assembly positioning, i.e., the positioning guide 15 serves both positioning and guiding purposes.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The inventors state that the present invention has been described in the series of detailed description listed above as a specific description of possible embodiments of the invention, but the present invention is not limited to the above detailed process equipment and process flows. And that it is not intended that the invention be limited to the precise process equipment and flows described above. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of raw materials for the product of the present invention, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present invention and the scope of disclosure.
Claims (10)
1. An MEA detection fixture, characterized by: the bipolar plate comprises a base, a pressing plate, a telescopic part, a plurality of bipolar plates arranged between the base and the pressing plate, a positioning guide rod arranged on the base, and a driving device which is in butt joint with the pressing plate and pushes the pressing plate to move towards the bipolar plates;
the telescoping member connects adjacent said bipolar plates and is used to connect said bipolar plates adjacent said compression plates and said compression plates;
the positioning guide rod penetrates through the pressing plate and is sleeved with the bipolar plate;
one surface of the bipolar plate is a cathode runner, and the other surface of the bipolar plate is an anode runner;
one end of the pressing plate is provided with a hydrogen inlet and an oxygen outlet corresponding to the cathode of the bipolar plate, and the other end of the pressing plate is provided with an oxygen inlet and a hydrogen outlet corresponding to the anode of the bipolar plate;
during detection, a plurality of MEAs are placed between adjacent bipolar plates, the driving device pushes the pressing plate, the hydrogen outlet is closed, gas is introduced from the hydrogen inlet, and the oxygen outlet and the oxygen inlet are opened to detect whether gas leakage exists or not, so that whether the MEAs leak gas or not is judged;
when the oxygen outlet and inlet detect gas, the hydrogen and oxygen leakage is indicated, namely the MEA leakage cannot be used for producing a galvanic pile.
2. An MEA inspection jig according to claim 1 wherein: the bipolar plates are provided with channels that open laterally into the flow field.
3. An MEA inspection jig according to claim 1 wherein: and a pressure detection device arranged between the driving device and the pressing plate.
4. An MEA inspection fixture according to claim 3 wherein: the pressure detection device is a pressure sensor;
after the pressure reached the assembly pressure of 100PSI, gas was introduced at 0.2MPa pressure from the hydrogen inlet.
5. An MEA inspection jig according to claim 1 wherein: the device also comprises a gas pipe communicated with the hydrogen outlet and the inlet and the oxygen inlet and outlet; the air pipes are provided with switch valves.
6. An MEA inspection fixture according to claim 5 wherein: a quick connector is arranged at the hydrogen inlet; the quick connector is connected with the gas pipe of the hydrogen inlet and the switch valve;
during detection, a plurality of MEAs are placed between adjacent bipolar plates, the driving device pushes the pressing plate, the hydrogen outlet is closed, and gas is introduced from the quick connector of the hydrogen inlet.
7. An MEA inspection jig according to claim 1 wherein: the base, the pressing plate and the bipolar plate are all provided with sealing rings.
8. An MEA inspection jig according to claim 1 wherein: the telescopic component is any one of a conical compression spring, a connecting rod mechanism, a flexible rope and a compression sponge.
9. An MEA inspection jig according to claim 1 wherein: the driving device is any one of a servo electric cylinder, an air cylinder and an oil cylinder.
10. An MEA inspection jig according to claim 1 wherein: the positioning guide rod is tangent to the outer edge of the MEA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711456046.4A CN107966249B (en) | 2017-12-27 | 2017-12-27 | MEA detects anchor clamps |
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| CN108918045A (en) * | 2018-05-30 | 2018-11-30 | 广东鸿图武汉压铸有限公司 | leakage testing system and method |
| CN108957046A (en) * | 2018-08-24 | 2018-12-07 | 先进储能材料国家工程研究中心有限责任公司 | Fuel cell membrane electrode test fixture |
| 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 |
| CN110672275A (en) * | 2019-08-23 | 2020-01-10 | 珠海格力电器股份有限公司 | Device and method for detecting welding leakage of bipolar plate, membrane electrode leakage and leakage outside galvanic pile |
| CN111024990B (en) * | 2019-11-19 | 2022-05-17 | 一汽解放汽车有限公司 | Battery membrane electrode testing device |
| CN110968129A (en) * | 2019-11-29 | 2020-04-07 | 浙江嘉杰汽车设计有限公司 | External water circulation temperature control system of fuel cell clamp |
| CN110988697A (en) * | 2019-12-13 | 2020-04-10 | 速博达(深圳)自动化有限公司 | Membrane electrode testing device and method |
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