Cross-link leakage detection device and cross-link leakage detection system

Abstract

The utility model provides a cross-leakage detection device and a cross-leakage detection system. The cross-leakage detection device includes an air intake plate and a detection plate detachably connected to the air intake plate, and a fixing position capable of fixing a test piece is provided between the air intake plate and the detection plate; an air cavity with an opening toward the detection plate is provided on the air intake plate, and an air intake portion and an air outlet portion connected to the air cavity are provided on the air intake plate, and the air intake portion is used to be connected to an external dry ice mist supply device, and / or to an external cold air supply device and an external hot air supply device; a detection port is provided on the detection plate. The cross-leakage detection device described in the utility model can introduce dry ice mist into the air cavity, observe whether dry ice mist flows out of the test piece, and judge whether the test piece has a cross-leakage problem; it can also change the temperature of the test piece, and judge whether the test piece has a cross-leakage problem by identifying whether there is an abnormal temperature point on the test piece.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, and in particular to a cross-talk detection device. Meanwhile, the utility model also relates to a cross-talk detection system provided with the cross-talk detection device. Background Art

[0002] Membrane electrode and electrode plate are important components of fuel cell stacks, among which gas diffusion layer, catalyst layer and polymer electrolyte membrane are prepared by hot pressing process to obtain membrane electrode. The main function of gas diffusion layer is to support catalyst layer, stabilize electrode structure, provide gas transmission channel and improve water management. The catalyst layer on both sides is the place where fuel and oxidant undergo electrochemical reaction.

[0003] The main functions of the bipolar plate are to separate the reaction gas, introduce the reaction gas into the fuel cell through the flow field, collect and conduct current, support the membrane electrode, and undertake the heat dissipation and drainage functions of the entire fuel cell. Therefore, the cross-leakage detection of the membrane electrode and bipolar plate is particularly important.

[0004] At present, when conducting cross-leakage detection on membrane electrodes, hydrogen needs to be introduced into the membrane electrodes. Since there is a Pt catalyst in the membrane electrode, it is highly active, and the increase in the flow rate of hydrogen passing through the leaking position will cause the catalyst to burn, thereby releasing heat and causing the local temperature of the cross-leak point to rise, which is easily detected by infrared detectors. However, as a flammable and explosive gas, hydrogen is not only difficult to obtain, but also the random discharge of hydrogen will cause great safety hazards.

[0005] In addition, when conducting leakage detection on bipolar plates, colored liquid is first injected into the cavity of the bipolar plate or monopolar plate, and the leakage is determined by observing whether there are bubbles seeping out of the bipolar plate. However, this detection method is not only difficult to operate, but the introduced colored liquid is easy to contaminate the surface of the plate, thereby affecting the use effect of the plate. Utility Model Content

[0006] In view of this, the utility model aims to provide a cross-talk detection device, so as to facilitate cross-talk detection on a test piece and have a good detection effect.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A cross-talk detection device comprises an air intake plate and a detection plate detachably connected to the air intake plate, and a fixing position capable of fixing a test piece is provided between the air intake plate and the detection plate; an air cavity with an opening toward the detection plate is provided on the air intake plate, and an air intake portion and an air outlet portion communicating with the air cavity are provided on the air intake plate, the air intake portion is respectively used to be connected to an external dry ice mist supply device, and / or, to an external cold air supply device and an external hot air supply device; a detection port corresponding to the opening is provided on the detection plate, and the detection port passes through the detection plate.

[0009] Furthermore, the air inlet portion includes two air inlets arranged on the air inlet plate, and the air outlet portion includes an air outlet arranged on the air inlet plate; one of the air inlets is used to connect to the external cold air supply device, and the other air inlet is used to connect to the external hot air supply device, or at least one of the air inlets is used to connect to the external dry ice mist supply device.

[0010] Further, the air intake plate is provided with a sealing structure for sealing the air intake plate and the test piece; and / or the detection plate is provided with a sealing structure for sealing the detection plate and the test piece.

[0011] Furthermore, the air intake plate and the detection plate are detachably connected via fasteners.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The cross-talk detection device described in the utility model facilitates the taking and placing of the test piece by clamping the test piece between a detachably connected air intake plate and a detection plate, and facilitates the observation of whether the test piece has cross-talk by setting a detection port. In a first usage scenario, when the air intake portion is connected to an external dry ice mist supply device, the external dry ice mist supply device can introduce dry ice mist into the air cavity, and by observing whether dry ice mist flows out of the test piece, it can be determined whether the test piece has a cross-talk problem and the location of the cross-talk point can be determined; in a second usage scenario, when the air intake portion is connected to an external cold air supply device and an external hot air supply device, cold air and hot air can be blown to the test piece, thereby facilitating the change of the temperature of the test piece, and by observing whether there are temperature abnormal points on the test piece, it can be determined whether cross-talk occurs on the test piece and the location of the cross-talk point. In the third usage scenario, cold air and hot air can be blown to the test piece to determine whether there is a cross-leakage problem on the test piece and the location of the cross-leakage point, and then dry ice mist can be blown to the test piece to verify again whether there is a cross-leakage problem on the test piece and the location of the cross-leakage point, thereby helping to improve the detection accuracy. The cross-leakage detection device not only has a simple structure and operation, and a pollution-free detection process, but also can perform cross-leakage detection on the plate and membrane electrode test pieces, and has good versatility.

[0014] In addition, another object of the present invention is to provide a cross-talk detection system, comprising the cross-talk detection device as described above, and a dry ice mist supply device connected to the air inlet, and / or a cold air supply device and a hot air supply device.

[0015] Furthermore, the dry ice mist supply device includes a dry ice atomization part connected to the air inlet part, and an air supply part connected to the dry ice atomization part; the dry ice mist atomized by the dry ice atomization part can flow into the air inlet part along with the gas supplied by the air supply part.

[0016] Furthermore, the dry ice atomization unit includes a smoke generator and a dry ice smoke machine connected to the smoke generator, and an outlet of the dry ice smoke machine is connected to the air inlet.

[0017] Furthermore, the air supply unit includes at least one of an air compressor and an air supply tank.

[0018] Furthermore, it also includes an electron microscope, wherein the detection end of the electron microscope is arranged toward the detection port.

[0019] Furthermore, it also includes an infrared imager for collecting temperature images, and the collecting end of the infrared imager is arranged toward the detection port.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] The cross-leakage detection system described in the utility model is beneficial to detecting whether there is a cross-leakage problem in the electrode plate waiting to be tested and the location of the cross-leakage point by arranging the cross-leakage detection device and the dry ice mist supply device as mentioned above. Compared with the traditional detection scheme using colored liquid, it avoids the contamination of the electrode plate waiting to be tested and has better detection convenience; and through the air intake part and the cold air supply device and the hot air supply device, it is beneficial for cold air and hot air to flow to the membrane electrode waiting to be tested, so that the temperature of the cross-leakage point of the test piece is abnormal. Compared with the traditional scheme of using hydrogen combustion, it is not only simple and safe to operate, and will not affect the structure of the test piece, but also connected with the cold air supply device, the hot air supply device and the dry ice mist supply device through the air intake part, which can improve the cross-leakage detection accuracy of the test piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of the cross-talk detection device according to an embodiment of the utility model in a disassembled state from one viewing angle;

[0024] Figure 2 It is a structural schematic diagram of the cross-talk detection device according to an embodiment of the utility model in another viewing angle in a disassembled state;

[0025] Figure 3 This is a schematic structural diagram of the air intake plate according to an embodiment of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the cross-talk detection device according to an embodiment of the utility model in a disassembled state from one viewing angle;

[0027] Figure 5 It is a structural schematic diagram of the cross-talk detection device according to an embodiment of the utility model in another viewing angle in a disassembled state;

[0028] Figure 6 This is a schematic structural diagram of the air intake plate described in an embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 1. Air intake plate; 2. Detection plate;

[0031] 100, air cavity; 101, air inlet; 102, air outlet; 103, threaded hole;

[0032] 201. Detection port; 202. Connection hole. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0036] The present embodiment relates to a cross-leakage detection device, which is used to perform cross-leakage detection on a test piece. In terms of overall structure, the cross-leakage detection device includes an air intake plate 1, and a detection plate 2 detachably connected to the air intake plate 1, and a fixing position capable of fixing the test piece is provided between the air intake plate 1 and the detection plate 2. An air cavity 100 with an opening toward the detection plate 2 is provided on the air intake plate 1, and an air intake portion and an air outlet portion communicating with the air cavity 100 are provided on the air intake plate 1, and a detection port 201 corresponding to the opening is provided on the detection plate 2, and the detection port 201 passes through the detection plate 2.

[0037] As a first implementation, the air intake in this embodiment can be connected to an external dry ice mist supply device, and the test piece is clamped between the detachably connected air intake plate 1 and the detection plate 2, which is convenient for taking and placing the test piece, and the detection port 201 is provided to facilitate observation of whether the test piece has leakage. By observing whether dry ice mist flows out of the test piece (such as the electrode plate), it can be determined whether the test piece has leakage and the location of the leakage point can be determined.

[0038] As a second implementation, the air intake in this embodiment can also be connected to an external cold air supply device and an external hot air supply device, and by blowing cold air and hot air to the test piece, it is beneficial to change the temperature of the test piece, and by observing whether there is an abnormal temperature point on the test piece (such as a membrane electrode), it can be determined whether there is a cross-leakage on the test piece and the location of the cross-leakage point. The cross-leakage detection device of this embodiment is not only simple in structure and operation, and pollution-free, but also can perform cross-leakage detection on the plate and the membrane electrode, and has good versatility.

[0039] Among them, the reason why the test piece is prone to abnormal temperature points at the leakage points due to the passage of cold air and hot air is that the temperature conduction speed of the non-leakage position on the test piece is slower than that of the leakage point, and the heat radiation is blocked, so that the temperature of the leakage point is higher than that of the non-leakage position. Therefore, the abnormally high temperature point is the leakage point.

[0040] As a third embodiment, the air intake is connected to an external dry ice mist supply device, an external cold air supply device, and an external hot air supply device. At this time, cold air and hot air are blown to the test piece to determine whether there is a cross-leakage problem on the test piece and the location of the cross-leakage point, and then dry ice mist is blown to the test piece to verify whether there is a cross-leakage problem on the test piece and the location of the cross-leakage point, thereby improving the detection accuracy.

[0041] It should be noted that the parts to be tested in this embodiment may be membrane electrodes and plates. The plates may be monopolar plates or bipolar plates. Of course, in specific implementations, the parts to be tested may also be other products that require cross-leakage detection. The membrane electrode can be clamped around the air intake plate 1 and the detection plate 2, and the three have good sealing properties in the clamped state. There are rubber strips around both sides of the plates. When the air intake plate 1 and the detection plate 2 clamp the plates, the sealing properties between the three can be ensured by the rubber strips on both sides.

[0042] Based on the above overall introduction, an exemplary structure of the cross-talk detection device described in this embodiment is as follows: Figures 1 to 3 As shown in . Both the air intake plate 1 and the detection plate 2 are rectangular, the cross-section of the opening and the air cavity 100 is rectangular, and the detection port 201 is also rectangular. Here, the structure of the air intake plate 1 and the detection plate 2 is simple and easy to process and form. The fixing position in this embodiment includes a first fixing surface provided on the air intake plate 1 and facing the piece to be tested, and a second fixing surface provided on the detection plate 2 and facing the piece to be tested. The piece to be tested is clamped between the first fixing surface and the second fixing surface, and fixed between the air intake plate 1 and the detection plate 2.

[0043] In specific implementation, the specifications of the air cavity 100, the opening and the detection port 201 should be adapted to the area to be detected on the test piece, so as to improve the detection effect of the membrane electrode and the plate. Of course, the cross-sections of the air intake plate 1 and the detection plate 2, as well as the opening and the air cavity 100, can also be in other geometric shapes as long as they meet the use requirements.

[0044] Preferably, the air inlet portion includes two air inlets 101 provided on the air inlet plate 1, and the air outlet portion includes an air outlet 102 provided on the air inlet plate 1. Here, the provision of the two air inlets 101, on the one hand, facilitates the connection of the air cavity 100 with the external cold air supply device and the external hot air supply device respectively when conducting cross-leakage detection on the membrane electrode and the plate waiting to be tested, thereby facilitating the flow of cold air and hot air into the air cavity 100, and further facilitating the improvement of the efficiency of cross-leakage detection on the membrane electrode and the plate.

[0045] On the other hand, at least one of the air inlets 101 is used to connect to an external dry ice mist supply device. In specific implementation, the external dry ice mist supply device is connected to one of the air inlets 101, and the other air inlet 101 is closed, or the external dry ice mist supply device is connected to both air inlets 101. Both connection schemes are conducive to the flow of dry ice mist into the air cavity 100, thereby improving the cross-talk detection effect of the electrode plate.

[0046] In specific implementation, a control valve is provided between the external cold air supply device and the external hot air supply device and the corresponding air inlet 101 to adjust the air intake state in the air cavity 100, so as to facilitate the cross-leakage detection of the membrane electrode and the electrode plate. A control valve is also provided between the external dry ice mist supply device and the corresponding air inlet 101 to adjust the air intake state in the air cavity 100, so as to facilitate the cross-leakage detection of the electrode plate. In order to facilitate the connection with the external cold air supply device and the external hot air supply device through pipelines, each air inlet 101 and air outlet 102 are protruding from the air inlet plate 1 to facilitate the connection with the pipeline.

[0047] like Figure 3 As shown in the figure, the air outlet 102 in this embodiment is arranged in the middle of the air cavity 100, and the two air inlets 101 are respectively arranged on the two opposite sides of the air outlet 102. Such an arrangement is not only convenient for the processing and forming of the air inlet 101 and the air outlet 102, but also convenient for the connection operation of the three with external components such as pipelines. At the same time, it is also convenient for cold air and hot air to blow directly to the membrane electrode and the electrode plate, thereby facilitating the formation of temperature abnormality points on the membrane electrode and the electrode plate. Of course, when it is implemented, the positions of the two air inlets 101 and the one air outlet 102 can also be adjusted according to the use requirements, and are only limited to the arrangement shown in the figure.

[0048] As a preferred embodiment, the air intake plate 1 and the detection plate 2 are detachably connected together by a bolt pair. Figures 1 to 3 As shown in the figure, the bolt pairs are multiple and are arranged on the edges around the air intake plate 1 and the detection plate 2 to improve the connection effect between the air intake plate 1 and the detection plate 2, the convenience of disassembly, and the sealing between the air intake plate 1, the test piece and the detection plate 2, thereby helping to improve the accuracy of leakage detection.

[0049] Specifically, if Figure 2 and Figure 3 As shown in the figure, multiple connection holes 202 are arranged at intervals on the edges of the detection plate 2, and threaded holes 103 are arranged one by one corresponding to each connection hole 202 on the air intake plate 1. The bolt pair includes bolts that pass through each connection hole 202 and are screwed to the corresponding threaded holes 103. Of course, in addition to using bolts to connect the air intake plate 1 and the detection plate 2, other connection structures can also be used as long as they meet the use requirements.

[0050] To further improve the sealing effect of the test piece between the air intake plate 1 and the detection plate 2, and to help improve the detection accuracy. In this embodiment, a sealing structure for sealing the air intake plate 1 and the test piece is provided on the air intake plate 1, and a sealing structure for sealing the detection plate 2 and the test piece is provided on the detection plate 2. In specific implementation, the sealing structure on the air intake plate 1 is arranged along the circumference of the opening, and the sealing structure on the detection plate 2 is arranged along the circumference of the detection port 201. Each sealing structure can adopt a frame-shaped rubber strip, which has a simple structure, is easy to arrange and implement, and has a good sealing effect. Of course, it is also feasible to provide a sealing structure only on one of the air intake plate 1 or the detection plate 2.

[0051] The cross-talk detection device in this embodiment is not only simple in structure, easy to operate and implement, and pollution-free, but also helps to quickly check whether there is leakage in the membrane electrode and the electrode plate, and has high detection efficiency and detection accuracy.

[0052] In some embodiments, Figures 4 to 6 As shown in , the number of the air inlet 101 can also be one, and the air inlet 101 and the air outlet 102 are respectively connected to the two ends of the air cavity 100. Of course, the positions of the air inlet 101 and the air outlet 102 can also be adjusted according to usage requirements.

[0053] At this time, in order to facilitate the connection with the external cold air supply device and the external cold air supply device respectively, a three-way pipe can be connected at the air inlet 101. Specifically, the two ends of the three-way pipe are respectively connected with the external cold air supply device and the external cold air supply device in a one-to-one correspondence, so that cold air and hot air can flow in respectively, and the other end of the three-way pipe is connected to the air inlet 101. At this time, through the cooperation of an air inlet 101 and a three-way pipe, the separate intake of cold air and hot air can still be achieved, which is conducive to improving the detection accuracy of the membrane electrode and the plate.

[0054] When the plate is tested for cross-talk leakage, the external dry ice mist supply device can be directly connected to the air inlet 101, which is beneficial for the dry ice mist to flow into the air cavity 100, thereby improving the cross-talk leakage detection accuracy of the plate.

[0055] The use method and beneficial effects of the cross-talk detection device in this embodiment are the same as those of the above-mentioned cross-talk detection device, and will not be described in detail here.

[0056] In some embodiments, the number of air inlets 101 in the cross-talk detection device can also be three, the first air inlet 101 is used to connect to an external dry ice mist supply device, and a first control valve is provided between the two. The second air inlet 101 is used to connect to an external cold air supply device, and a second control valve is provided between the two. The third air inlet 101 is used to connect to an external hot air supply device, and a third control valve is provided between the two.

[0057] It should be noted that dry ice is a white crystal that is easy to sublime at room temperature and has a high heat of vaporization. When it sublimates under normal pressure, it can rapidly reduce the surrounding temperature. Therefore, when dry ice sublimates in the air, it will liquefy and even further condense water vapor in the air. The formed water vapor droplets or small ice crystals adhere to the dust in the air to form the white dry ice mist that we can see.

[0058] When the first control valve is in the open state, and the second control valve and the third control valve are in the closed state, the dry ice mist can be used to detect whether the test piece has a leakage problem and the leakage point problem. Then the first control valve is closed, and the state of the second control valve and the third control valve are adjusted to successively introduce cold air and hot air into the air cavity 100, so as to detect whether the test piece has a leakage again. This double detection method is conducive to improving the detection accuracy.

[0059] In addition, the present embodiment also relates to a cross-talk detection system, including the cross-talk detection device as described above, and a dry ice mist supply device connected to the air inlet, and / or a cold air supply device and a hot air supply device.

[0060] As described above, there are three main structural forms of the cross-leakage detection device. Specifically, the first structural form is that the air inlet is connected to the external dry ice mist supply device, and by observing whether dry ice mist flows out of the detection port 201, it can be determined whether the test piece has cross-leakage and the cross-leakage position can be determined.

[0061] The second structural form is: the air inlet part is connected to the external cold air supply device and the external hot air supply device to successively introduce cold air and hot air to the test piece, which is convenient for observing whether there are abnormal temperature points on the test piece (such as the membrane electrode), so as to determine whether the test piece has leakage and determine the location of the leakage.

[0062] The third structural form is that the air intake is connected to the external dry ice mist supply device, the external cold air supply device and the external hot air supply device respectively. First, cold air and hot air are blown to the test piece to determine whether there is a cross-leakage problem on the test piece and the location of the cross-leakage point, and then dry ice mist is blown to the test piece to verify whether there is a cross-leakage problem on the test piece and the location of the cross-leakage point, thereby improving the detection accuracy.

[0063] The cross-talk detection system in this embodiment includes any cross-talk detection device in the above three structural forms.

[0064] As a preferred embodiment, the dry ice mist supply device in this embodiment includes a dry ice atomization part connected to the air inlet part, and an air supply part connected to the dry ice atomization part, and the dry ice mist atomized by the dry ice atomization part can flow into the air inlet part along with the gas supplied by the air supply part. Among them, the dry ice atomization part and the air supply part can be provided with a control valve that is connected between the two. Here, the dry ice atomizer and the air supply part cooperate to improve the flow effect of the dry ice mist into the air cavity 100, thereby further improving the detection effect and accuracy.

[0065] During specific implementation, the dry ice atomization unit includes a smoke generator and a dry ice smoke machine connected to the smoke generator. The outlet of the dry ice smoke machine is connected to the air inlet. The product is mature and is conducive to improving the atomization efficiency and concentration of dry ice, thereby helping to improve the detection accuracy. In addition, the air supply unit includes at least one of an air compressor and a gas supply tank. Among them, compressed gas is stored in the gas supply tank. The air compressor and the gas supply tank here are both conducive to transporting the atomized dry ice into the air cavity 100, thereby improving the transportation efficiency of the dry ice mist, thereby helping to improve the detection accuracy and efficiency. The compressed gas is preferably nitrogen, which is easy to purchase and pollution-free.

[0066] Preferably, the cross-talk detection system in this embodiment further includes an electron microscope, and the detection end of the electron microscope is arranged toward the detection port 201. The electron microscope here is conducive to observing whether dry ice mist flows out of the plate, thereby facilitating improving the cross-talk detection accuracy.

[0067] When the cross-leakage detection system in this embodiment is used, the monopolar plate or bipolar plate to be tested is first clamped between the air intake plate 1 and the detection plate 2, and then the smoke generator and the dry ice smoke machine are started, and the control valve is opened so that the dry ice mist flows into the air cavity 100 with the gas. Finally, whether the dry ice mist flows out through the detection port 201 can be observed to determine whether the plate has cross-leakage. If the dry ice mist can be observed to flow out at the detection port 201, it means that there is cross-leakage on the plate, and the position where the dry ice mist flows out is the position of the cross-leakage point. In specific operations, a metallographic microscope can be used to observe whether there is white dry ice on the plate to further improve the detection accuracy.

[0068] As a preferred embodiment, the cold air supply device may be a first tank body storing liquid nitrogen, and the hot air supply device may be a second tank body storing hot gas, and the second tank body is provided with a heating unit for heating the gas. A control valve is provided between the first tank body, the second tank body and the corresponding air inlet 101 to control the conduction state between the first tank body and the second tank body and the air inlet 101.

[0069] Furthermore, this embodiment also includes an infrared imager for collecting temperature images, and the collection end of the infrared imager is arranged toward the detection port 201. Here, the infrared imager is a mature product, which is conducive to identifying temperature abnormal points, and then determining whether the membrane electrode has leakage and the location of the leakage point.

[0070] Specifically, taking the membrane electrode as an example, the cold air cools the membrane electrode to -60-40°C, and the image of the membrane electrode area captured by the infrared imager appears blue. After the cold air is stopped from entering the air cavity 100 and the hot air is introduced into the air cavity 100, on the one hand, the hot air heats up the membrane electrode as a whole. Since a large amount of hot air passes through the leakage point, the local temperature rises, and a bright spot appears on the infrared imager. On the other hand, the hot air will generate strong thermal radiation, and the thermal radiation at the leakage point is less blocked, and an obvious bright spot will appear on the infrared imager. The two aspects work together to accurately determine the leakage point of the membrane electrode.

[0071] When the cross-talk detection system described in the utility model is in use, the control valve between the first tank body and the air inlet 101 is first opened, and the control valve between the second tank body and the air inlet 101 is closed, so that the cold air in the first tank body flows into the air cavity 100 and thus reduces the temperature of the membrane electrode. Then, the control valve between the first tank body and the air inlet 101 is closed, and the control valve between the second tank body and the air inlet 101 is opened, so that the hot air flow in the second tank body flows into the air cavity 100 and thus heats the membrane electrode.

[0072] Then, the infrared imager is used to obtain the temperature image of the membrane electrode at the detection port 201. Finally, check whether there are points with abnormally high temperatures on the temperature image. If there are, it means that the membrane electrode has a cross-leakage problem, and the cross-leakage point is the location of the abnormally high temperature point. If there are no abnormally high temperature points on the temperature image, it means that the membrane electrode has no cross-leakage problem.

[0073] In addition, in this embodiment, the control valve between the first tank body and the air inlet 101 can be opened first, and the control valve between the second tank body and the air inlet 101 can be closed, so that the cold air in the first tank body flows into the air cavity 100 to reduce the temperature of the membrane electrode, and then the control valve between the first tank body and the air inlet 101 is closed, and the control valve between the second tank body and the air inlet 101 is opened, so that the hot air flow in the second tank body flows into the air cavity 100 to heat the membrane electrode. Then, the temperature image of the membrane electrode at the detection port 201 is obtained by an infrared imager, and then it is preliminarily concluded whether the test piece has a cross-leakage problem and the location of the cross-leakage point.

[0074] Then, start the smoke generator and the dry ice smoke machine, and open the control valve to allow the dry ice mist to flow into the air cavity 100 along with the gas. Finally, observe whether the dry ice mist flows out through the detection port 201 to verify again whether there is a cross-link leakage on the test piece and the location of the cross-link leakage point. This double-layer detection method is conducive to improving the accuracy of cross-link leakage detection.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cross-talk detection device, characterized in that: It comprises an air intake plate (1), and a detection plate (2) detachably connected to the air intake plate (1), and a fixing position capable of fixing a to-be-tested object is provided between the air intake plate (1) and the detection plate (2); The air inlet plate (1) is provided with an air cavity (100) opening toward the detection plate (2), and the air inlet plate (1) is provided with an air inlet portion and an air outlet portion communicating with the air cavity (100), the air inlet portion being used to be connected to an external dry ice mist supply device, and / or, to an external cold air supply device and an external hot air supply device; The detection plate (2) is provided with a detection port (201) corresponding to the opening, and the detection port (201) passes through the detection plate (2).

2. The crosstalk detection device according to claim 1, characterized in that: The air inlet portion comprises two air inlets (101) provided on the air inlet plate (1), and the air outlet portion comprises an air outlet (102) provided on the air inlet plate (1); One of the air inlets (101) is used to connect to the external cold air supply device, and the other air inlet (101) is used to connect to the external hot air supply device, or at least one of the air inlets (101) is used to connect to the external dry ice mist supply device.

3. The cross-talk detection device according to claim 1, characterized in that: The air intake plate (1) is provided with a sealing structure for sealing the air intake plate (1) and the test piece; and / or, The detection plate (2) is provided with a sealing structure for sealing the detection plate (2) and the object to be detected.

4. The cross-talk detection device according to claim 1, characterized in that: The air intake plate (1) and the detection plate (2) are detachably connected via fasteners.

5. A cross-talk detection system, characterized in that: It comprises the cross-talk detection device according to any one of claims 1 to 4, and a dry ice mist supply device, and / or a cold air supply device and a hot air supply device.

6. The cross-talk detection system according to claim 5, characterized in that: The dry ice mist supply device includes a dry ice atomization part connected to the air inlet part, and an air supply part for connecting to the dry ice atomization part; The dry ice mist atomized by the dry ice atomizing unit can flow into the air inlet portion along with the gas supplied by the air supply portion.

7. The cross-talk detection system according to claim 6, characterized in that: The dry ice atomization part includes a smoke generator and a dry ice smoke machine connected to the smoke generator, and the outlet of the dry ice smoke machine is connected to the air inlet part.

8. The cross-talk detection system according to claim 6, characterized in that: The air supply unit includes at least one of an air compressor and an air supply tank.

9. The cross-talk detection system according to claim 5, characterized in that: It also includes an electron microscope, wherein the detection end of the electron microscope is arranged toward the detection port.

10. The cross-talk detection system according to claim 5, characterized in that: It also includes an infrared imager for collecting temperature images, and the collecting end of the infrared imager is arranged toward the detection port.

Images