Detection device

Abstract

The application provides a detection device, which comprises a clamp, the clamp comprising two clamping parts movably arranged in a direction of approaching or moving away from each other to clamp or release a membrane electrode arranged between the two clamping parts; each clamping part comprises a current collector plate, a first plate surface of the current collector plate being used to contact the membrane electrode; a cathode current collector plate is used to be conductively connected with a positive electrode of a constant current source, and an anode current collector plate is used to be conductively connected with a negative electrode of the constant current source; a gas flow channel is arranged on each current collector plate, a second end of the gas flow channel extending to the first plate surface of the current collector plate, and a first end of the gas flow channel extending to an outer wall surface of the current collector plate; a first port of one gas flow channel is used to be connected and communicated with a gas charging pipeline, and a first port of the other gas flow channel is used to be connected and communicated with a gas pipeline of a flow meter. The detection device of the application solves the problem of low detection efficiency of the air tightness and coating of the membrane electrode in the prior art.

Description

Technical Field

[0001] This invention relates to the field of membrane electrode detection technology, and more specifically, to a detection device. Background Technology

[0002] Due to energy shortages and environmental pollution, clean and efficient alternative energy sources have been extensively researched in recent years. Proton exchange membrane fuel cells (PEMFCs) are electrochemical energy converters that directly convert the chemical energy in fuel into direct current (DC). Compared to traditional energy conversion technologies, they offer advantages such as high efficiency, low or zero emissions, low cost, no moving parts, and modularity.

[0003] The membrane electrode assembly (MEA) is the region where electrochemical reactions occur and is the core component of the entire fuel cell system. With the mass production and commercial application of fuel cells, MEA quality testing technology has developed rapidly. Among these, for MEA airtightness testing, there are physical methods, helium mass spectrometry leak detectors, and infrared detection. For coating problems (dual anode, dual cathode, anode-cathode inversion, and coating defects, etc.), there are constant current charging methods and XRF testing.

[0004] Existing methods for detecting the airtightness and coating issues of membrane electrodes are two separate methods that cannot be performed simultaneously, resulting in long testing times and low efficiency. Summary of the Invention

[0005] The main objective of this invention is to provide a detection device to solve the problem of low detection efficiency in the prior art regarding the airtightness and coating of membrane electrodes.

[0006] To achieve the above objectives, the present invention provides a detection device comprising a clamp, the clamp including two clamping portions movably disposed in a direction approaching or moving away from each other to clamp or release a membrane electrode disposed between the two clamping portions; the two clamping portions are an anode clamping portion and a cathode clamping portion; wherein each clamping portion includes a current collector, the two surfaces of the current collector being a first surface and a second surface, the first surface of the current collector being used to contact the membrane electrode; the current collector of the anode clamping portion is an anode current collector, and the current collector of the cathode clamping portion is a cathode current collector; the cathode current collector is used to connect with a constant current source. The cathode current collector is electrically connected to the anode current collector, which is used to electrically connect to the negative electrode of the constant current source. Each current collector is provided with a gas flow channel, the second end of which extends to the first surface of the current collector, and the first end of which extends to the outer wall surface of the current collector. The first port of the gas flow channel on the cathode current collector is used to connect and communicate with the gas charging pipeline, and the first port of the gas flow channel on the anode current collector is used to connect and communicate with the gas circuit of the flow meter. Alternatively, the first port of the gas flow channel on the anode current collector is used to connect and communicate with the gas charging pipeline, and the first port of the gas flow channel on the cathode current collector is used to connect and communicate with the gas circuit of the flow meter.

[0007] Furthermore, the first plate surface of the current collector is provided with a plurality of grooves arranged sequentially along its edge circumferentially, any two adjacent grooves are connected, and each groove is connected end to end to form a snap-fit ​​protrusion, and the plurality of grooves together form a central protrusion; the membrane electrode has a middle contact portion; the central protrusion of each current collector contacts the middle contact portion; the second end of the gas flow channel extends to the surface of the central protrusion.

[0008] Furthermore, each groove is a polygonal groove, and any two adjacent grooves of the collector plate share a side.

[0009] Furthermore, each clamping part also includes a sealing gasket disposed on the side of the current collector facing the membrane electrode; the sealing gasket is provided with a central hole and multiple mounting holes, the multiple mounting holes being arranged sequentially around the central hole in the circumferential direction; the central hole and each mounting hole penetrate the sealing gasket in the thickness direction; the multiple mounting holes are arranged one-to-one with multiple snap-fit ​​protrusions, so that each snap-fit ​​protrusion passes through the corresponding mounting hole, and the central contact part and the central protrusion both pass through the central hole.

[0010] Furthermore, the testing device also includes a press, which includes an upper plate and a lower plate distributed in a vertical direction. The upper plate of the press is movably arranged relative to the lower plate of the press in a vertical direction. One of the two clamping parts is fixedly connected to the upper plate of the press, and the other clamping part is fixedly connected to the lower plate of the press. Each clamping part also includes an insulating plate connected to a current collector, and the insulating plate is disposed between the current collector and the upper or lower plate of the press.

[0011] Furthermore, the insulating plate of the anode clamping part is an anode insulating plate, and the insulating plate of the cathode clamping part is a cathode insulating plate; each clamping part's current collector plate is provided with a first connecting hole, and each clamping part's insulating plate is provided with a second connecting hole; by inserting the first fastener into the lower plate of the press, the second connecting hole of the anode insulating plate, and the first connecting hole of the anode current collector plate, the anode current collector plate, the anode insulating plate, and the lower plate of the press are relatively fixed; by inserting the second fastener into the upper plate of the press, the second connecting hole of the cathode insulating plate, and the... The cathode current collector, cathode insulating plate, and upper plate of the press are all relatively fixed by the first connecting hole of the cathode current collector; or by the first fastener passing through the upper plate of the press, the second connecting hole of the anode insulating plate, and the first connecting hole of the anode current collector. The cathode current collector, anode insulating plate, and upper plate of the press are all relatively fixed by the second fastener passing through the lower plate of the press, the second connecting hole of the cathode insulating plate, and the first connecting hole of the cathode current collector.

[0012] Furthermore, the insulating plate of the anode clamping part is an anode insulating plate, and the insulating plate of the cathode clamping part is a cathode insulating plate; each current collector is provided with a first positioning hole, each insulating plate is provided with a second positioning hole, and the membrane electrode is provided with a third positioning hole; by inserting positioning pins into the second positioning hole of the anode insulating plate, the first positioning hole of the anode current collector, the third positioning hole of the membrane electrode, the first positioning hole of the cathode current collector, and the second positioning hole of the cathode insulating plate, the anode insulating plate, the anode current collector, the membrane electrode, the cathode current collector, and the cathode insulating plate are positioned.

[0013] Furthermore, each current collector is provided with a current collecting hole. The current collecting hole of the cathode current collector is used to conduct electricity to the positive electrode of the constant current source, and the current collecting hole of the anode current collector is used to conduct electricity to the negative electrode of the constant current source.

[0014] Furthermore, the detection device also includes: a first locking member, which is disposed within the current collecting hole of the cathode current collector plate, and is electrically connected to the positive electrode of the constant current source or the positive electrode of the constant current source is sandwiched between the first locking member and the hole wall of the current collecting hole of the cathode current collector plate; and / or a second locking member, which is disposed within the current collecting hole of the anode current collector plate, and is electrically connected to the negative electrode of the constant current source or the negative electrode of the constant current source is sandwiched between the second locking member and the hole wall of the current collecting hole of the anode current collector plate.

[0015] Furthermore, the manifold is made of copper and its surface is gold-plated.

[0016] According to the technical solution of the present invention, the detection device includes a clamp for holding a membrane electrode. The clamp includes two clamping parts, which are movably arranged in a direction that approaches or moves away from each other, so as to clamp or release the membrane electrode disposed between the two clamping parts; wherein, the two clamping parts are an anode clamping part and a cathode clamping part, respectively; the two clamping parts are respectively disposed on both sides of the membrane electrode along the thickness direction of the membrane electrode, so as to clamp the membrane electrode between the two clamping parts.

[0017] Each clamping part includes a current collector plate. For each current collector plate, the two plate surfaces are a first plate surface and a second plate surface, respectively. The first plate surface of the current collector plate is used to contact the membrane electrode. The current collector plate of the anode clamping part is an anode current collector plate, and the current collector plate of the cathode clamping part is a cathode current collector plate. The cathode current collector plate is used to be electrically connected to the positive electrode of the constant current source, and the anode current collector plate is used to be electrically connected to the negative electrode of the constant current source.

[0018] In the specific implementation process, a rapid quality inspection of the membrane electrode is performed by constant current charging: the positive terminal of the constant current source is conductively connected to the cathode current collector, and the negative terminal of the constant current source is conductively connected to the anode current collector; then the positive terminal clamp of the voltage acquisition device is clamped to the cathode current collector, and the negative terminal clamp of the voltage acquisition device is clamped to the anode current collector; the constant current source is turned on to charge and discharge the membrane electrode, and the charging and discharging rate is observed to determine whether there are quality problems with the membrane electrode, such as double anode, double cathode, reversed anode and cathode, or missing coating.

[0019] Each manifold is equipped with a gas flow channel. On each manifold, the second end of the gas flow channel extends to the first surface of the manifold, and the first end extends to the outer wall surface of the manifold. The first port of the gas flow channel on the cathode manifold is used to connect and communicate with an inflation pipeline to inflate the gas flow channel on the cathode manifold through the inflation pipeline; the first port of the gas flow channel on the anode manifold is used to connect and communicate with the gas path of the flow meter. Alternatively, the first port of the gas flow channel on the anode manifold is used to connect and communicate with an inflation pipeline to inflate the gas flow channel on the anode manifold through the inflation pipeline; the first port of the gas flow channel on the cathode manifold is used to connect and communicate with the gas path of the flow meter.

[0020] In the specific implementation process, the airtightness of the membrane electrode is tested: The first port of the gas channel on the cathode current collector is connected to the gas charging pipeline, and the first port of the gas channel on the anode current collector is connected to the gas path of the flow meter. Gas is charged into the gas channel on the cathode current collector through the gas charging pipeline, and the charging pressure is maintained at a set value. The gas flow rate detected by the flow meter at this time is the amount of gas leakage into the membrane electrode. Alternatively, the first port of the gas channel on the anode current collector is connected to the gas charging pipeline, and the first port of the gas channel on the cathode current collector is connected to the gas path of the flow meter. Gas is charged into the gas channel on the anode current collector through the gas charging pipeline, and the charging pressure is maintained at a set value. The gas flow rate detected by the flow meter at this time is the amount of gas leakage into the membrane electrode.

[0021] It is evident that the testing device of this application can simultaneously perform airtightness testing and quality inspection of coating and other issues, greatly improving the quality inspection efficiency and solving the problem of low testing efficiency for airtightness and coating of membrane electrodes in the prior art. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 An exploded view of the clamp of the detection device according to the present invention is shown;

[0024] Figure 2 A schematic diagram of the fixture of the detection device according to the present invention is shown;

[0025] Figure 3 It shows Figure 2 A schematic diagram of the fixture of the detection device from another perspective;

[0026] Figure 4 A schematic diagram of the structure of the manifold of the clamp in the detection device according to the present invention is shown;

[0027] Figure 5 A schematic diagram of the structure of the insulating plate of the clamp of the detection device according to the present invention is shown;

[0028] Figure 6 A schematic diagram of the structure of the sealing gasket of the clamp in the detection device according to the present invention is shown;

[0029] Figure 7 A schematic diagram of the structure of the membrane electrode according to the present invention is shown.

[0030] The above figures include the following reference numerals:

[0031] 10. Clamping part; 101. Anode clamping part; 102. Cathode clamping part;

[0032] 11. Manifold; 111. Groove; 112. Snap-fit ​​protrusion; 113. Central protrusion; 114. First positioning hole; 115. Manifold hole; 116. First connecting hole; 117. Gas flow channel; 1171. First port; 1172. Second port; 118. Manifold body; 119. Outer plate;

[0033] 12. Insulating board; 121. Second connecting hole; 122. Second positioning hole;

[0034] 13. Sealing gasket; 131. Center hole; 132. Mounting hole;

[0035] 20. Membrane electrode; 21. Edge portion; 22. Middle contact portion; 23. Third positioning hole;

[0036] 31. First fastener; 32. Second fastener; 33. Locating pin. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] This invention provides a detection device, please refer to... Figures 1 to 7 The detection device includes a clamp for holding the membrane electrode 20. The clamp includes two clamping parts 10, which are movably arranged in a direction that approaches or moves away from each other, so as to clamp or release the membrane electrode 20 disposed between the two clamping parts 10. The two clamping parts 10 are an anode clamping part 101 and a cathode clamping part 102, respectively. The two clamping parts 10 are respectively disposed on both sides of the membrane electrode 20 along the thickness direction of the membrane electrode 20, so as to clamp the membrane electrode 20 between the two clamping parts 10.

[0041] Each clamping part 10 includes a current collector 11. For each current collector 11, the two plate surfaces are a first plate surface and a second plate surface, respectively. The first plate surface of the current collector 11 is used to contact the membrane electrode 20. The current collector 11 of the anode clamping part 101 is an anode current collector, and the current collector 11 of the cathode clamping part 102 is a cathode current collector. The cathode current collector is used to be electrically connected to the positive electrode of the constant current source, and the anode current collector is used to be electrically connected to the negative electrode of the constant current source.

[0042] In the specific implementation process, the membrane electrode 20 is subjected to rapid quality inspection by constant current charging: the positive terminal of the constant current source is conductively connected to the cathode current collector, and the negative terminal of the constant current source is conductively connected to the anode current collector; then the positive terminal clamp of the voltage acquisition device is clamped to the cathode current collector, and the negative terminal clamp of the voltage acquisition device is clamped to the anode current collector; the constant current source is turned on to charge and discharge the membrane electrode 20, and the charging and discharging rate is observed to determine whether there are quality problems with the membrane electrode 20, such as double anode, double cathode, reversed anode and cathode, or missing coating.

[0043] Each manifold 11 is provided with a gas flow channel 117. On each manifold 11, the second end of the gas flow channel 117 extends to the first surface of the manifold 11, and the first end of the gas flow channel 117 extends to the outer wall surface of the manifold 11. The first port of the gas flow channel 117 on the cathode manifold is used to connect and communicate with an inflation pipeline to inflate the gas flow channel 117 on the cathode manifold through the inflation pipeline; the first port of the gas flow channel 117 on the anode manifold is used to connect and communicate with the gas path of the flow meter. Alternatively, the first port of the gas flow channel 117 on the anode manifold is used to connect and communicate with an inflation pipeline to inflate the gas flow channel 117 on the anode manifold through the inflation pipeline; the first port of the gas flow channel 117 on the cathode manifold is used to connect and communicate with the gas path of the flow meter. Figure 4 The first port 1171 and the second port 1172 of the gas flow channel 117 are shown.

[0044] In the specific implementation process, the airtightness of the membrane electrode 20 is tested: the first port of the gas channel 117 on the cathode current collector is connected to the gas charging pipeline, and the first port of the gas channel 117 on the anode current collector is connected to the gas path of the flow meter; gas is charged into the gas channel 117 on the cathode current collector through the gas charging pipeline, and the charging pressure is kept constant at a set value. At this time, the gas flow rate detected by the flow meter is the amount of gas leakage from the membrane electrode 20. Alternatively, the first port of the gas channel 117 on the anode current collector is connected to the gas charging pipeline, and the first port of the gas channel 117 on the cathode current collector is connected to the gas path of the flow meter; gas is charged into the gas channel 117 on the anode current collector through the gas charging pipeline, and the charging pressure is kept constant at a set value. At this time, the gas flow rate detected by the flow meter is the amount of gas leakage from the membrane electrode 20.

[0045] It should be noted that, theoretically, gas cannot pass through the membrane electrode 20, so if gas is supplied to one side of the membrane electrode 20, gas will not be collected on the other side; if there is gas on the other side of the membrane electrode 20, the amount of gas on the other side of the membrane electrode 20 is the amount of gas passing through the membrane electrode 20.

[0046] It should be noted that, along the thickness direction of the membrane electrode 20, the membrane electrode 20 has an anode side and a cathode side; when the membrane electrode 20 is not compressed, the anode side and the cathode side of the membrane electrode 20 are in a disconnected state without contact; the membrane electrode 20 needs to be compressed to bring the anode side and the cathode side of the membrane electrode 20 into contact, thereby making the anode side and the cathode side of the membrane electrode 20 electrically connected; when the pressure acting on the membrane electrode 20 disappears, the membrane electrode 20 will expand to return to the disconnected state where the anode side and the cathode side are not in contact. Two clamping parts 10 are used to clamp the membrane electrode 20 to compress the membrane electrode 20.

[0047] It is evident that the testing device of this application can simultaneously perform airtightness testing and quality inspection of coating and other issues, greatly improving the quality inspection efficiency and solving the problem of low testing efficiency for airtightness and coating of membrane electrodes in the prior art.

[0048] Specifically, when the flow meter reading is less than the preset flow rate, the air tightness of the membrane electrode 20 is deemed to be qualified; when the flow meter reading is greater than or equal to the preset flow rate, the air tightness of the membrane electrode 20 is deemed to be unqualified.

[0049] Specifically, the thickness direction of the current collector 11 is the same as or parallel to the thickness direction of the membrane electrode 20.

[0050] Optionally, the inflation pressure for inflating the gas flow channel 117 through the inflation line is 50 kPa.

[0051] In this embodiment, on each collector plate 11, a plurality of grooves 111 are arranged sequentially along the edge of the first plate surface. Any two adjacent grooves 111 are connected, and each groove 111 is connected end to end to form a snap-fit ​​protrusion 112, that is, there are multiple snap-fit ​​protrusions 112; the multiple grooves 111 together form a central protrusion 113.

[0052] The membrane electrode 20 has a middle contact portion 22; the middle protrusion 113 of each current collector 11 contacts the middle contact portion 22 of the membrane electrode 20.

[0053] Specifically, the second end of the gas flow channel 117 of each manifold 11 extends to the surface of the central protrusion 113.

[0054] Specifically, the central protrusion 113 of each manifold 11 is in contact with the central contact portion 22.

[0055] Specifically, the membrane electrode 20 also has an edge portion 21, which surrounds the intermediate contact portion 22, and the thickness of the intermediate contact portion 22 of the membrane electrode 20 is greater than the thickness of its edge portion 21.

[0056] Specifically, the anode side and cathode side of the membrane electrode 20 are both disposed on the intermediate contact portion 22; when the two clamping portions 10 clamp the membrane electrode 20, the intermediate contact portion 22 of the membrane electrode 20 is compressed; when the pressure exerted on the membrane electrode 20 by the two clamping portions 10 disappears, the intermediate contact portion 22 of the membrane electrode 20 expands.

[0057] In this embodiment, in each collector plate 11, each groove portion 111 is a polygonal groove, and any two adjacent groove portions 111 share a side; that is, in any two adjacent groove portions 111, one side of one groove portion 111 is one side of the other groove portion 111, so that the two adjacent groove portions 111 are connected.

[0058] Specifically, in each manifold 11, at least some of the recesses 111 are quadrilateral recesses.

[0059] Specifically, in each collector plate 11, the first plate surface includes two designated sides arranged opposite to each other, and the plurality of groove portions 111 include two groove units, and each groove unit includes a plurality of groove portions 111; the two groove units are arranged one-to-one with the two designated sides, and the plurality of groove portions 111 of each groove unit are arranged sequentially along the length direction of the corresponding designated side; the plurality of groove portions 111 of each groove unit are all rectangular grooves.

[0060] In this embodiment, each clamping part 10 further includes a sealing gasket 13 disposed on the side of the current collector 11 facing the membrane electrode 20, that is, the sealing gasket 13 is disposed between the current collector 11 and the membrane electrode 20. Each sealing gasket 13 has a central hole 131 and multiple mounting holes 132, which are sequentially arranged around the central hole 131 circumferentially, that is, the multiple mounting holes 132 are sequentially arranged along the circumferential edge of the sealing gasket 13. The central hole 131 and each mounting hole 132 penetrate the sealing gasket 13 along its thickness direction, that is, the central hole 131 and each mounting hole 132 penetrate both surfaces of the sealing gasket 13. The thickness direction of the sealing gasket 13 is the same as or parallel to the thickness direction of the current collector 11. By providing the sealing gasket 13, the accuracy of the membrane electrode 20 airtightness detection is ensured.

[0061] In each clamping part 10, the multiple mounting holes 132 of the sealing gasket 13 are correspondingly arranged with the multiple snap-fit ​​protrusions 112 of the current collector 11, so that each snap-fit ​​protrusion 112 passes through the corresponding mounting hole 132, that is, the sealing gasket 13 is arranged in the multiple recesses 111 of the current collector 11; the intermediate contact part 22 of the membrane electrode 20 and the central protrusion 113 of the current collector 11 both pass through the intermediate hole 131, so that the intermediate contact part 22 contacts the central protrusion 113. When the membrane electrode 20 is clamped between the two clamping parts 10, the intermediate contact part 22 passes through the intermediate hole 131 of the sealing gasket 13 of the two clamping parts 10.

[0062] Specifically, the thickness of the sealing gasket 13 is greater than the protrusion height of each snap-fit ​​protrusion 112 and greater than the protrusion height of the central protrusion 113.

[0063] Specifically, the edge portion 21 of the membrane electrode 20 contacts the edge portion of the plurality of mounting holes 132 of the sealing gasket 13.

[0064] Specifically, the sealing gasket 13 of the anode clamping part 101 is an anode sealing gasket, and the sealing gasket 13 of the cathode clamping part 102 is a cathode sealing gasket.

[0065] In practice, transparent tape or glue can be used to attach the anode sealing gasket to the groove wall of at least a portion of the groove 111 of the anode current collector; transparent tape or glue can be used to attach the cathode sealing gasket to the groove wall of at least a portion of the groove 111 of the cathode current collector.

[0066] In this embodiment, the detection device further includes a press, which includes an upper plate and a lower plate distributed in a vertical direction. The upper plate of the press is movably disposed relative to the lower plate of the press in a vertical direction. One of the two clamping parts 10 is fixedly connected to the upper plate of the press, and the other clamping part 10 is fixedly connected to the lower plate of the press, so that the upper plate of the press drives the clamping part 10 connected thereto to move closer to or away from the other clamping part 10 connected to the lower plate of the press in a vertical direction.

[0067] Specifically, the upper plate of the press is connected to the output shaft of the drive cylinder. The output shaft of the drive cylinder extends and retracts vertically to drive the upper plate of the press to move vertically. The drive cylinder typically uses compressed air or nitrogen.

[0068] Specifically, the lower platen of the press is placed on the worktable.

[0069] Specifically, the first type of connection between the fixture and the press is as follows: the cathode clamping part 102 is fixedly connected to the upper plate of the press, and the anode clamping part 101 is fixedly connected to the lower plate of the press. In practice, before the press is started, the cathode clamping part 102 and the anode clamping part 101 are separated; when the press is started, the upper plate of the press moves vertically downwards, causing the cathode clamping part 102 to move closer to the anode clamping part 101, and under the pressing action of the press, the cathode clamping part 102 and the anode clamping part 101 are pressed together; after the test is completed, the upper plate of the press moves vertically upwards, causing the cathode clamping part 102 to move away from the anode clamping part 101, i.e., lifting the cathode clamping part 102.

[0070] The second type of connection between the fixture and the press is as follows: the anode clamping part 101 is fixedly connected to the upper plate of the press, and the cathode clamping part 102 is fixedly connected to the lower plate of the press. In specific implementation, before the press is started, the cathode clamping part 102 and the anode clamping part 101 are in a separate state; when the press is started, the upper plate of the press moves vertically downward to drive the anode clamping part 101 closer to the cathode clamping part 102, and under the pressing action of the press, the anode clamping part 101 and the cathode clamping part 102 are pressed together; after the test is completed, the upper plate of the press is moved vertically upward to drive the anode clamping part 101 away from the cathode clamping part 102, that is, to lift the anode clamping part 101.

[0071] Optionally, the pressure of the drive cylinder that presses the anode clamping part 101 and the cathode clamping part 102 is approximately 8 bar.

[0072] In this embodiment, since the upper and lower plates of the press are made of stainless steel, each clamping part 10 also includes an insulating plate 12 located on the side of the current collector 11 away from the membrane electrode 20, that is, the insulating plate 12 is disposed between the current collector 11 and the upper or lower plate of the press; the insulating plate 12 of each clamping part 10 is connected to the current collector 11.

[0073] Specifically, the insulating plate 12 of the anode clamping part 101 is an anode insulating plate, and the insulating plate 12 of the cathode clamping part 102 is a cathode insulating plate. The anode insulating plate is disposed between the anode current collector and the lower plate of the press, thus insulating the anode current collector from the lower plate of the press. The cathode insulating plate is disposed between the cathode current collector and the upper plate of the press, thus insulating the cathode current collector from the upper plate of the press. Alternatively, the anode insulating plate is disposed between the anode current collector and the upper plate of the press, thus insulating the anode current collector from the upper plate of the press; the cathode insulating plate is disposed between the cathode current collector and the lower plate of the press, thus insulating the cathode current collector from the lower plate of the press.

[0074] Since the constant current charging method requires a high compression ratio for the membrane electrode 20, the detection device of this application can adjust the clamping degree by adjusting the clamping force of the upper plate of the press (i.e., the driving cylinder pressure), the thickness of the anode sealing gasket, and the thickness of the cathode sealing gasket, so as to achieve the optimal compression ratio of the membrane electrode 20. Specifically, the compression ratio of the membrane electrode 20 is the ratio of the compression amount of the membrane electrode 20 to its thickness before compression, where the compression amount is the difference between the thickness of the membrane electrode 20 before compression and its thickness after compression.

[0075] Specifically, the thickness direction of the insulating plate 12 is the same as or parallel to the thickness direction of the current collector 11.

[0076] Specifically, in each clamping part 10, one surface of the insulating plate 12 is attached to the second surface of the current collector 11.

[0077] In this embodiment, each current collector 11 is provided with a first connection hole 116, and each insulating plate 12 is provided with a second connection hole 121.

[0078] When the clamp and press adopt the first matching method: a first fastener 31 is inserted into the second connecting hole 121 of the anode insulating plate and the first connecting hole 116 of the anode current collector on the lower plate of the press. That is, by inserting the first fastener 31 into the second connecting hole 121 of the anode insulating plate and the first connecting hole 116 of the anode current collector, the anode current collector, the anode insulating plate and the lower plate of the press are all relatively fixed, thereby realizing the fixed connection between the anode clamping part 101 and the lower plate of the press. A second fastener 32 is inserted into the second connecting hole 121 of the cathode insulating plate and the first connecting hole 116 of the cathode current collector on the upper plate of the press. That is, by inserting the second fastener 32 into the second connecting hole 121 of the cathode insulating plate and the first connecting hole 116 of the cathode current collector, the cathode current collector, the cathode insulating plate and the upper plate of the press are all relatively fixed, thereby realizing the fixed connection between the cathode clamping part 102 and the upper plate of the press.

[0079] When the clamp and press adopt the second matching method: a first fastener 31 is inserted into the second connecting hole 121 of the anode insulating plate and the first connecting hole 116 of the anode current collector on the upper plate of the press. That is, by inserting the first fastener 31 into the second connecting hole 121 of the anode insulating plate and the first connecting hole 116 of the anode current collector, the anode current collector, the anode insulating plate and the upper plate of the press are all relatively fixed, thereby achieving a fixed connection between the anode clamping part 101 and the upper plate of the press. A second fastener 32 is inserted into the second connecting hole 121 of the cathode insulating plate and the first connecting hole 116 of the cathode current collector on the lower plate of the press. That is, by inserting the second fastener 32 into the second connecting hole 121 of the cathode insulating plate and the first connecting hole 116 of the cathode current collector, the cathode current collector, the cathode insulating plate and the lower plate of the press are all relatively fixed, thereby achieving a fixed connection between the cathode clamping part 102 and the lower plate of the press.

[0080] Since both the upper and lower plates of the press are made of stainless steel, insulating bushings are fitted onto both the first fastener 31 and the second fastener 32. When the fixture and the press are fitted in the first manner, the insulating bushing on the first fastener 31 insulates the anode current collector plate from the lower plate of the press, and the insulating bushing on the second fastener 32 insulates the cathode insulating plate from the upper plate of the press. When the fixture and the press are fitted in the second manner, the insulating bushing on the first fastener 31 insulates the anode current collector plate from the upper plate of the press, and the insulating bushing on the second fastener 32 insulates the cathode insulating plate from the lower plate of the press.

[0081] Optionally, the first fastener 31 is a bolt or screw, and the second fastener 32 is a bolt or screw.

[0082] Specifically, the anode current collector is provided with a plurality of first connection holes 116, the anode insulating plate is provided with a plurality of second connection holes 121, and there are a plurality of first fasteners 31; the plurality of first fasteners 31 are provided in a one-to-one correspondence with the plurality of first connection holes 116 on the anode current collector, the plurality of first fasteners 31 are provided in a one-to-one correspondence with the plurality of second connection holes 121 on the anode insulating plate, and the plurality of first connection holes 116 on the anode current collector are provided in a one-to-one correspondence with the plurality of second connection holes 121 on the anode insulating plate; each first fastener 31 passes through the corresponding second connection hole 121 on the anode insulating plate and the corresponding first connection hole 116 on the anode current collector.

[0083] Specifically, the cathode current collector is provided with a plurality of first connection holes 116, the cathode insulating plate is provided with a plurality of second connection holes 121, and there are a plurality of second fasteners 32; the plurality of second fasteners 32 are provided in a one-to-one correspondence with the plurality of first connection holes 116 on the cathode current collector, the plurality of second fasteners 32 are provided in a one-to-one correspondence with the plurality of second connection holes 121 on the cathode insulating plate, and the plurality of first connection holes 116 on the cathode current collector are provided in a one-to-one correspondence with the plurality of second connection holes 121 on the cathode insulating plate; each second fastener 32 passes through the corresponding second connection hole 121 on the cathode insulating plate and the corresponding first connection hole 116 on the cathode current collector.

[0084] Specifically, on each collector plate 11, the first connection hole 116 is located on the side of the plurality of groove portions 111 away from the central protrusion 113, that is, the plurality of first connection holes 116 are located on the side of the plurality of groove portions 111 away from the central protrusion 113, and the plurality of first connection holes 116 are arranged circumferentially along the edge of the collector plate 11.

[0085] In this embodiment, each current collector 11 is provided with a first positioning hole 114, each insulating plate 12 is provided with a second positioning hole 122, and the membrane electrode 20 is provided with a third positioning hole 23. Positioning pins 33 are inserted into the second positioning hole 122 of the anode insulating plate, the first positioning hole 114 of the anode current collector, the third positioning hole 23 of the membrane electrode 20, the first positioning hole 114 of the cathode current collector, and the second positioning hole 122 of the cathode insulating plate. That is, by inserting the positioning pins 33 into the second positioning holes 122 of the anode insulating plate, the first positioning hole 114 of the anode current collector, the third positioning hole 23 of the membrane electrode 20, the first positioning hole 114 of the cathode current collector, and the second positioning hole 122 of the cathode insulating plate, the anode insulating plate, the anode current collector, the membrane electrode 20, the cathode current collector, and the cathode insulating plate are precisely positioned.

[0086] In the specific implementation process, when the fixture and the press adopt the first matching method, before the press is started, the cathode clamping part 102 and the anode clamping part 101 are in a separate state. First, the positioning pin 33 is inserted into the second positioning hole 122 of the anode insulating plate and the first positioning hole 114 of the anode current collector plate; then, the anode sealing gasket is pasted onto the anode current collector plate, so that the multiple snap-fit ​​protrusions 112 of the anode current collector plate are inserted one-to-one into the multiple mounting holes 132 of the anode sealing gasket, so that the anode... The central protrusion 113 of the current collector plate passes through the central hole 131 of the anode sealing gasket; then the membrane electrode 20 is placed on the anode sealing gasket, and the positioning pin 33 passes through the third positioning hole 23 of the membrane electrode 20. At this time, the positioning pin 33 passes through the second positioning hole 122 of the anode insulating plate, the first positioning hole 114 of the anode current collector plate, and the third positioning hole 23 of the membrane electrode 20. The central contact portion 22 of the membrane electrode 20 and the central protrusion 113 of the anode current collector plate both pass through the anode sealing gasket. Inside the central hole 131 of the sealing gasket, the edge 21 of the membrane electrode 20 contacts the edge portion of the multiple mounting holes 132 of the anode sealing gasket; then, the cathode sealing gasket is pasted onto the cathode current collector, so that the central protrusion 113 of the cathode current collector passes through the central hole 131 of the cathode sealing gasket, and the multiple snap-fit ​​protrusions 112 of the cathode current collector are correspondingly passed through the multiple mounting holes 132 of the cathode sealing gasket; the press is started, clamping the cathode clamping part 102 and the anode clamping part 102 together. After part 101 is pressed, the middle contact part 22 of the membrane electrode 20 passes through the middle hole 131 of the cathode sealing gasket, and the edge part 21 of the membrane electrode 20 contacts the edge part where the multiple mounting holes 132 of the cathode sealing gasket are located. At this time, the positioning pin 33 passes through the second positioning hole 122 of the anode insulating plate, the first positioning hole 114 of the anode current collector, the third positioning hole 23 of the membrane electrode 20, the first positioning hole 114 of the cathode current collector, and the second positioning hole 122 of the cathode insulating plate.

[0087] In the specific implementation process, when the fixture and the press adopt the second cooperation method, before the press is started, the cathode clamping part 102 and the anode clamping part 101 are in a separate state. First, the positioning pin 33 is inserted into the second positioning hole 122 of the cathode insulating plate and the first positioning hole 114 of the cathode current collector plate; then, the cathode sealing gasket is pasted onto the cathode current collector plate, so that the multiple snap-fit ​​protrusions 112 of the cathode current collector plate are inserted one-to-one into the multiple mounting holes 132 of the cathode sealing gasket, so that the cathode... The central protrusion 113 of the current collector plate passes through the central hole 131 of the cathode sealing gasket; then the membrane electrode 20 is placed on the cathode sealing gasket, and the positioning pin 33 passes through the third positioning hole 23 of the membrane electrode 20. At this time, the positioning pin 33 passes through the second positioning hole 122 of the cathode insulating plate, the first positioning hole 114 of the cathode current collector plate, and the third positioning hole 23 of the membrane electrode 20. The central contact portion 22 of the membrane electrode 20 and the central protrusion 113 of the cathode current collector plate both pass through the cathode sealing gasket. Inside the central hole 131 of the sealing gasket, the edge 21 of the membrane electrode 20 contacts the edge portion of the multiple mounting holes 132 of the cathode sealing gasket; then, the anode sealing gasket is pasted onto the anode current collector, so that the central protrusion 113 of the anode current collector passes through the central hole 131 of the anode sealing gasket, and the multiple snap-fit ​​protrusions 112 of the anode current collector are correspondingly passed through the multiple mounting holes 132 of the anode sealing gasket; the press is started to clamp the anode clamping part 101 and the cathode. After part 102 is pressed, the middle contact part 22 of the membrane electrode 20 passes through the middle hole 131 of the anode sealing gasket, and the edge part 21 of the membrane electrode 20 contacts the edge part where the multiple mounting holes 132 of the anode sealing gasket are located. At this time, the positioning pin 33 passes through the second positioning hole 122 of the cathode insulating plate, the first positioning hole 114 of the cathode current collector, the third positioning hole 23 of the membrane electrode 20, the first positioning hole 114 of the anode current collector, and the second positioning hole 122 of the anode insulating plate.

[0088] Specifically, each current collector 11 is provided with multiple first positioning holes 114, each insulating plate 12 is provided with multiple second positioning holes 122, the membrane electrode 20 is provided with multiple third positioning holes 23, and there are multiple positioning pins 33; the multiple positioning pins 33 are provided one-to-one with the multiple first positioning holes 114 on the anode current collector, the multiple positioning pins 33 are provided one-to-one with the multiple second positioning holes 122 on the anode insulating plate, and the multiple positioning pins 33 are provided one-to-one with the multiple third positioning holes 23 on the membrane electrode 20. As appropriate, multiple positioning pins 33 are configured one-to-one with multiple first positioning holes 114 on the cathode current collector plate, and multiple positioning pins 33 are configured one-to-one with multiple second positioning holes 122 on the cathode insulating plate; each positioning pin 33 passes through the corresponding second positioning hole 122 of the anode insulating plate, the corresponding first positioning hole 114 of the anode current collector plate, the corresponding third positioning hole 23 of the membrane electrode 20, the corresponding first positioning hole 114 of the cathode current collector plate, and the corresponding second positioning hole 122 of the cathode insulating plate.

[0089] Specifically, on each current collector plate 11, the first positioning hole 114 is located on the side of the plurality of groove portions 111 away from the central protrusion 113, that is, the plurality of first positioning holes 114 are located on the side of the plurality of groove portions 111 away from the central protrusion 113, and the plurality of first positioning holes 114 are spaced apart circumferentially along the edge of the current collector plate 11. The third positioning hole 23 is provided on the edge portion 21 of the membrane electrode 20, that is, the plurality of third positioning holes 23 are all provided on the edge portion 21 of the membrane electrode 20, and are spaced apart circumferentially along the edge of the membrane electrode 20.

[0090] In this embodiment, each current collector plate 11 is provided with a current collection hole 115. The current collection hole 115 of the cathode current collector plate is used to connect to the positive electrode of the constant current source, and the current collection hole 115 of the anode current collector plate is used to connect to the negative electrode of the constant current source.

[0091] In the specific implementation process, the positive electrode of the constant current source is connected to the cathode current collector through the current collection hole 115 of the cathode current collector so that the positive electrode of the constant current source is electrically connected to the cathode current collector; the negative electrode of the constant current source is connected to the anode current collector through the current collection hole 115 of the anode current collector so that the negative electrode of the constant current source is electrically connected to the anode current collector.

[0092] Specifically, the detection device further includes a first locking member, which passes through the current collecting hole 115 of the cathode current collector plate. The first locking member is electrically connected to the positive electrode of the constant current source, so that the cathode current collector plate is electrically connected to the positive electrode of the constant current source through the first locking member; or, the positive electrode of the constant current source is sandwiched between the first locking member and the hole wall of the current collecting hole 115 of the cathode current collector plate, so that the positive electrode of the constant current source is in contact with the hole wall of the current collecting hole 115 of the cathode current collector plate for conductive contact. Optionally, the first locking member is a bolt.

[0093] Specifically, the detection device further includes a second locking member, which passes through the current collecting hole 115 of the anode current collector plate. The second locking member is electrically connected to the negative electrode of the constant current source, so that the anode current collector plate is electrically connected to the negative electrode of the constant current source through the second locking member; alternatively, the negative electrode of the constant current source is sandwiched between the second locking member and the hole wall of the current collecting hole 115 of the anode current collector plate, so that the negative electrode of the constant current source contacts and conducts electricity with the hole wall of the current collecting hole 115 of the anode current collector plate. Optionally, the second locking member is a bolt.

[0094] In this embodiment, for each collector plate 11, the collector plate 11 includes a collector plate body 118 and an outer plate 119 connected to each other. The two plates of the collector plate body 118 are its first plate surface and second plate surface, and the two plates of the collector plate body 118 are the two plates of the aforementioned collector plate 11, that is, the first plate surface of the collector plate body 118 is the first plate surface of the aforementioned collector plate 11, and the second plate surface of the collector plate body 118 is the second plate surface of the aforementioned collector plate 11. A plurality of groove portions 111, a plurality of snap-fit ​​protrusions 112, a central protrusion 113, a plurality of first positioning holes 114, a plurality of first connecting holes 116, and a gas flow channel 117 are all provided on the collector plate body 118, and the first end of the gas flow channel 117 extends to the outer wall surface of the collector plate body 118. The collecting hole 115 is provided on the outer plate 119.

[0095] Optionally, on each manifold 11, the surface of the external plate 119 is parallel to or located on the same plane as the surface of the manifold body 118.

[0096] Optionally, on each manifold 11, the manifold hole 115 penetrates both surfaces of the outer plate 119.

[0097] Optionally, the external plate 119 is a strip plate; on each collector plate 11, one end of the external plate 119 is connected to the collector plate body 118, and the collection hole 115 is provided at the other end of the external plate 119.

[0098] In this embodiment, each current collector 11 is made of copper and its surface is plated with gold to enhance its conductivity and prevent corrosion.

[0099] In this embodiment, each insulating board 12 is made of glass fiber epoxy resin material to give the insulating board 12 good insulation performance.

[0100] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0101] In the detection device provided by the present invention, the detection device includes a clamp for holding a membrane electrode 20. The clamp includes two clamping parts 10, which are movably arranged in a direction that approaches or moves away from each other, so as to clamp or release the membrane electrode 20 disposed between the two clamping parts 10. The two clamping parts 10 are respectively an anode clamping part 101 and a cathode clamping part 102. The two clamping parts 10 are respectively disposed on both sides of the membrane electrode 20 along the thickness direction of the membrane electrode 20, so as to clamp the membrane electrode 20 between the two clamping parts 10.

[0102] Each clamping part 10 includes a current collector 11. For each current collector 11, the two plate surfaces are a first plate surface and a second plate surface, respectively. The first plate surface of the current collector 11 is used to contact the membrane electrode 20. The current collector 11 of the anode clamping part 101 is an anode current collector, and the current collector 11 of the cathode clamping part 102 is a cathode current collector. The cathode current collector is used to be electrically connected to the positive electrode of the constant current source, and the anode current collector is used to be electrically connected to the negative electrode of the constant current source.

[0103] In the specific implementation process, the membrane electrode 20 is subjected to rapid quality inspection by constant current charging: the positive terminal of the constant current source is conductively connected to the cathode current collector, and the negative terminal of the constant current source is conductively connected to the anode current collector; then the positive terminal clamp of the voltage acquisition device is clamped to the cathode current collector, and the negative terminal clamp of the voltage acquisition device is clamped to the anode current collector; the constant current source is turned on to charge and discharge the membrane electrode 20, and the charging and discharging rate is observed to determine whether there are quality problems with the membrane electrode 20, such as double anode, double cathode, reversed anode and cathode, or missing coating.

[0104] Each manifold 11 is provided with a gas flow channel 117. On each manifold 11, the second end of the gas flow channel 117 extends to the first surface of the manifold 11, and the first end of the gas flow channel 117 extends to the outer wall surface of the manifold 11. The first port of the gas flow channel 117 on the cathode manifold is used to connect and communicate with an inflation pipeline to inflate the gas flow channel 117 on the cathode manifold through the inflation pipeline; the first port of the gas flow channel 117 on the anode manifold is used to connect and communicate with the gas path of the flow meter. Alternatively, the first port of the gas flow channel 117 on the anode manifold is used to connect and communicate with an inflation pipeline to inflate the gas flow channel 117 on the anode manifold through the inflation pipeline; the first port of the gas flow channel 117 on the cathode manifold is used to connect and communicate with the gas path of the flow meter.

[0105] In the specific implementation process, the airtightness of the membrane electrode 20 is tested: the first port of the gas channel 117 on the cathode current collector is connected to the gas charging pipeline, and the first port of the gas channel 117 on the anode current collector is connected to the gas path of the flow meter; gas is charged into the gas channel 117 on the cathode current collector through the gas charging pipeline, and the charging pressure is kept constant at a set value. At this time, the gas flow rate detected by the flow meter is the amount of gas leakage from the membrane electrode 20. Alternatively, the first port of the gas channel 117 on the anode current collector is connected to the gas charging pipeline, and the first port of the gas channel 117 on the cathode current collector is connected to the gas path of the flow meter; gas is charged into the gas channel 117 on the anode current collector through the gas charging pipeline, and the charging pressure is kept constant at a set value. At this time, the gas flow rate detected by the flow meter is the amount of gas leakage from the membrane electrode 20.

[0106] It is evident that the testing device of this application can simultaneously perform airtightness testing and quality inspection of coating and other issues, greatly improving the quality inspection efficiency and solving the problem of low testing efficiency for airtightness and coating of membrane electrodes in the prior art.

[0107] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0108] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0109] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A detection device, characterized in that, The device includes a clamp comprising two clamping portions (10) which are movably disposed in a direction that approaches or moves away from each other, to clamp or release a membrane electrode (20) disposed between the two clamping portions (10); the two clamping portions (10) are an anode clamping portion (101) and a cathode clamping portion (102). Each of the clamping parts (10) includes a current collector plate (11), the two plates of the current collector plate (11) are a first plate surface and a second plate surface, and the first plate surface of the current collector plate (11) is used to contact the membrane electrode (20); The current collector (11) of the anode clamping part (101) is an anode current collector, and the current collector (11) of the cathode clamping part (102) is a cathode current collector; the cathode current collector is used to be electrically connected to the positive electrode of the constant current source, and the anode current collector is used to be electrically connected to the negative electrode of the constant current source. Each of the aforementioned manifolds (11) is provided with a gas flow channel (117), the second end of the gas flow channel (117) extends to the first plate surface of the manifold (11), and the first end of the gas flow channel (117) extends to the outer wall surface of the manifold (11); The first port of the gas channel (117) on the cathode collector plate is used to connect and communicate with the gas charging pipeline, and the first port of the gas channel (117) on the anode collector plate is used to connect and communicate with the gas circuit of the flow meter; or the first port of the gas channel (117) on the anode collector plate is used to connect and communicate with the gas charging pipeline, and the first port of the gas channel (117) on the cathode collector plate is used to connect and communicate with the gas circuit of the flow meter. The first plate surface of the current collector (11) is provided with a protruding central protrusion (113). The central protrusion (113) of each current collector (11) is in contact with the middle contact portion (22) of the membrane electrode (20). The second end of the gas flow channel (117) on the current collector (11) extends to the surface of the central protrusion (113). Each of the clamping parts (10) further includes a sealing gasket (13) disposed on the side of the current collector (11) facing the membrane electrode (20); the sealing gasket (13) is provided with a central hole (131), the central contact part (22) and the central protrusion (113) are both disposed in the central hole (131), and the thickness of the sealing gasket (13) is greater than the protrusion height of the central protrusion (113).

2. The detection device of claim 1, wherein, The first plate surface of the collector plate (11) is provided with a plurality of grooves (111) arranged sequentially along its edge. Any two adjacent grooves (111) are connected. Each groove (111) is connected end to end to form a snap-fit ​​protrusion (112). The plurality of grooves (111) together form a central protrusion (113).

3. The detection device of claim 2, wherein, Each of the groove portions (111) is a polygonal groove, and any two adjacent groove portions (111) of the collector plate (11) share a side.

4. The detection device of claim 2, wherein, The sealing gasket (13) is provided with a central hole (131) and a plurality of mounting holes (132), and the plurality of mounting holes (132) are arranged sequentially around the central hole (131) in the circumferential direction; the central hole (131) and each of the mounting holes (132) penetrate the sealing gasket (13) in the thickness direction of the sealing gasket (13). The plurality of mounting holes (132) are provided in a one-to-one correspondence with the plurality of snap-fit ​​protrusions (112), so that each snap-fit ​​protrusion (112) passes through the corresponding mounting hole (132).

5. The detection device of claim 1, wherein, The detection device further includes a press, which includes an upper plate and a lower plate distributed in a vertical direction. The upper plate of the press is movably arranged relative to the lower plate of the press in a vertical direction. One of the two clamping parts (10) is fixedly connected to the upper plate of the press, and the other clamping part (10) is fixedly connected to the lower plate of the press. Each of the clamping parts (10) further includes an insulating plate (12) connected to the current collector (11), the insulating plate (12) being disposed between the current collector (11) and the upper or lower plate of the press.

6. The detection device of claim 5, wherein, The insulating plate (12) of the anode clamping part (101) is an anode insulating plate, and the insulating plate (12) of the cathode clamping part (102) is a cathode insulating plate; each clamping part (10) has a first connecting hole (116) on its current collecting plate (11), and each clamping part (10) has a second connecting hole (121) on its insulating plate (12). By inserting the first fastener (31) into the lower plate of the press, the second connecting hole (121) of the anode insulating plate, and the first connecting hole (116) of the anode current collector, the anode current collector, the anode insulating plate, and the lower plate of the press are all relatively fixed; by inserting the second fastener (32) into the upper plate of the press, the second connecting hole (121) of the cathode insulating plate, and the first connecting hole (116) of the cathode current collector, the cathode current collector, the cathode insulating plate, and the upper plate of the press are all relatively fixed; or By inserting the first fastener (31) into the upper plate of the press, the second connecting hole (121) of the anode insulating plate, and the first connecting hole (116) of the anode current collector, the anode current collector, the anode insulating plate, and the upper plate of the press are all relatively fixed; by inserting the second fastener (32) into the lower plate of the press, the second connecting hole (121) of the cathode insulating plate, and the first connecting hole (116) of the cathode current collector, the cathode current collector, the cathode insulating plate, and the lower plate of the press are all relatively fixed.

7. The detection device of claim 5, wherein, The insulating plate (12) of the anode clamping part (101) is an anode insulating plate, and the insulating plate (12) of the cathode clamping part (102) is a cathode insulating plate; each of the current collectors (11) is provided with a first positioning hole (114), each of the insulating plates (12) is provided with a second positioning hole (122), and the membrane electrode (20) is provided with a third positioning hole (23); by passing the positioning pin (33) through the second positioning hole (122) of the anode insulating plate, the first positioning hole (114) of the anode current collector, the third positioning hole (23) of the membrane electrode (20), the first positioning hole (114) of the cathode current collector, and the second positioning hole (122) of the cathode insulating plate, the anode insulating plate, the anode current collector, the membrane electrode (20), the cathode current collector, and the cathode insulating plate are positioned.

8. The detection device of claim 1, wherein, Each of the current collectors (11) is provided with a current collection hole (115). The current collection hole (115) of the cathode current collector is used to be electrically connected to the positive electrode of the constant current source, and the current collection hole (115) of the anode current collector is used to be electrically connected to the negative electrode of the constant current source.

9. The detection device of claim 8, wherein, The detection device further includes: A first locking element is disposed within the current collecting hole (115) of the cathode current collector plate. The first locking element is electrically connected to the positive electrode of the constant current source, or the positive electrode of the constant current source is sandwiched between the first locking element and the hole wall of the current collecting hole (115) of the cathode current collector plate; and / or The second locking member is inserted into the current collection hole (115) of the anode current collector plate. The second locking member is electrically connected to the negative electrode of the constant current source, or the negative electrode of the constant current source is sandwiched between the second locking member and the hole wall of the current collection hole (115) of the anode current collector plate.

10. The detection device of claim 1, wherein, The current collector (11) is made of copper and the surface of the current collector (11) is plated with gold.

Images