Testing device

Abstract

The utility model relates to the field of fuel cells, and provides a testing device which is used for testing the durability of a bonding interface on a piece to be tested. The testing device comprises a testing box and an inflation pipeline connecting the testing box with an external air source, the testing box comprises a first shell and a second shell, a to-be-tested piece can be clamped between the first shell and the second shell, a first cavity is defined between the first shell and the to-be-tested piece, and a second cavity is defined between the first shell and the to-be-tested piece. A second cavity is defined between the second shell and the to-be-tested piece; the first cavity is used for containing a test solution for soaking the bonding interface, the second cavity is communicated with the inflation pipeline, and an external gas source can introduce gas with preset pressure into the second cavity. The testing device disclosed by the utility model is simple in structure, easy to process and manufacture and convenient to assemble, and is favorable for carrying out durability real-time testing on the bonding interface on the to-be-tested piece in a soaking state, so that failure time can be accurately judged, and the accuracy of a testing result is improved.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to a testing device. Background Technology

[0002] Adhesives generally consist of resin, curing agent, coupling agent, toughening agent, diluent, and a small amount of additives. The main function of adhesives is to firmly bond two substrates together at their interface. They are widely used in industries such as electronic packaging, building materials, aerospace, automotive manufacturing, and healthcare. Taking a single cell in a fuel cell as an example, adhesive bonding is required during its fabrication. For instance, adhesives are typically needed to connect the frame membrane to the proton exchange membrane, and between the frame membrane and the metal plate (bipolar plate). Furthermore, durability tests are required to evaluate the material properties of adhesives during selection and testing.

[0003] Traditional testing requires immersing the test specimen in a solution using a reaction vessel and controlling the solution temperature with an oven. The specimen is then removed from the solution before the actual test. This traditional testing setup is complex, requires additional equipment for temperature control, and separates the immersion process from the test. The repeated removal and placement of the specimen, influenced by external environmental factors, not only makes it difficult to accurately assess the timing of adhesive interface failure but also easily leads to distorted test results. Utility Model Content

[0004] In view of this, the present invention aims to provide a testing device to improve the accuracy of adhesive interface durability test results.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A testing apparatus for performing durability testing on adhesive interfaces on a test piece, comprising a test chamber and an inflation line connecting the test chamber to an external air source.

[0007] The test chamber includes a first housing and a second housing that are fastened together. The test piece can be clamped between the first housing and the second housing, forming a first cavity between the first housing and the test piece, and forming a second cavity between the second housing and the test piece.

[0008] The first cavity is used to hold the test solution for immersing the bonding interface, the second cavity is connected to the air inlet pipe, and the external air source can introduce gas at a preset pressure into the second cavity.

[0009] Further, a positioning structure is arranged between the first shell and the second shell, and the positioning structure is capable of positioning the to-be-tested member on the first shell or the second shell.

[0010] Further, the positioning structure comprises a positioning column arranged on one of the first shell and the second shell, and a positioning hole arranged on the other of the first shell and the second shell; when the first shell and the second shell are connected, the positioning column is arranged in the positioning hole, and the positioning column positions the to-be-tested member on the first shell or the second shell.

[0011] Further, a first sealing member is arranged on the first shell, and the first sealing member is capable of sealing the gap between the first shell and the to-be-tested member; and / or, a second sealing member is arranged on the second shell, and the second sealing member is capable of sealing the gap between the second shell and the to-be-tested member.

[0012] Further, a heating device and a temperature detecting device are arranged on the test box; the heating device is capable of heating the test box, and the temperature detecting device is capable of detecting the temperature in the first cavity.

[0013] Further, the heating device comprises a heat conduction sleeve arranged on the test box, and a heating sheet arranged on the heat conduction sleeve.

[0014] Further, a waterproof and air-permeable device is arranged on the first shell, and the waterproof and air-permeable device is capable of balancing the pressure inside and outside the test box.

[0015] Further, the test box further comprises a tightening member; the first shell and the second shell are connected together through the tightening member after being connected.

[0016] Further, a flow detecting device is arranged on the inflation pipeline.

[0017] Further, a cut-off valve and a pressure adjusting device are arranged on the inflation pipeline; and / or, a pressure relief pipeline is connected in parallel with the inflation pipeline, and a pressure relief valve is arranged on the pressure relief pipeline.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The utility model discloses a testing device, through adopting the first casing and second casing that buckle connection together, when the testing piece is clamped between the first casing and second casing, the first casing and the testing piece form the first cavity, the second casing and the testing piece form the second cavity, so utilize the test solution in the first cavity to soak the bonding interface, the gas of preset pressure is passed into the second cavity, so this is favorable to the bonding interface on the testing piece in the soaking state and carries out the durability real -time test, thereby is favorable to accurate determination failure time, improve the accuracy of test result, and the testing device structure of the utility model is simple, easy to process manufacturing, and makes the assembly more convenient, and has very good use effect.

[0020] In addition, the positioning structure arranged between the first casing and the second casing is favorable to better positioning the testing piece on the first casing or the second casing. The positioning structure adopts a positioning column and a positioning hole, which is simple in structure and convenient to prepare and form. When the first casing and the second casing are buckled and connected, the positioning column and the positioning hole are inserted and matched, so that the testing piece is better positioned on the first casing or the second casing.

[0021] Secondly, the first sealing piece is arranged to better seal between the first casing and the testing piece, which can effectively prevent the leakage of the test solution. The second sealing piece is arranged to better seal between the second casing and the testing piece, which can effectively prevent the leakage of the gas. Moreover, the cooperation of the first sealing piece and the second sealing piece can further improve the sealing performance between the testing piece and the first casing and the second casing, thereby further improving the accuracy of the durability test result.

[0022] Furthermore, the heating device is arranged on the test box to heat the test solution inside the test box, and the temperature detection device is arranged on the test box to facilitate real-time detection of the temperature inside the test box, thereby facilitating the guarantee of the temperature required for durability test and improving the accuracy of the test result. The heating device comprises a heat-conducting sleeve and a heating sheet, which is convenient for arranging the heating sheet on the heat-conducting sleeve and fixing the heating sheet on the test box.

[0023] The waterproof and breathable device is arranged on the first casing to balance the air pressure inside and outside the test box, which is favorable to the smooth progress of the durability test. The first casing and the second casing are connected together by the tightening piece, which is simple in structure and can guarantee the reliability of the connection between the first casing and the second casing and the reliability of the fixation of the testing piece, so that the assembly of the test box is more convenient.

[0024] In addition, the flow detection device installed on the inflation pipeline can detect the gas flow rate within the pipeline, facilitating timely determination of the test piece's failure and accurate assessment of its failure time. The shut-off valve on the inflation pipeline helps control its opening and closing. The pressure regulating device helps regulate the gas pressure within the inflation pipeline. The pressure relief pipeline and valve allow for the release of excessive gas pressure during durability testing, ensuring the safety of the gas system. Attached Figure Description

[0025] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0026] Figure 1 This is a schematic diagram of the testing device described in an embodiment of the present invention;

[0027] Figure 2 This is a first-view structural schematic diagram of the test box described in an embodiment of the present invention;

[0028] Figure 3 This is a second-view structural schematic diagram of the test box described in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the first housing described in an embodiment of the present utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the second housing as described in an embodiment of the present utility model;

[0031] Figure 6 This is a first-view structural schematic diagram of the test piece according to an embodiment of the present invention;

[0032] Figure 7 This is a structural schematic diagram of the test piece from a second perspective according to an embodiment of the present invention;

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Test chamber; 2. Test piece; 3. Thermal jacket; 4. Fastening components; 5. Inflation pipeline; 6. External air source; 7. Pressure relief pipeline;

[0035] 101, first shell; 102, second shell; 11, temperature detection device; 12, waterproof and breathable device; 13, liquid discharge pipeline; 14, electromagnetic valve; 15, positioning column; 16, first sealing groove; 17, first limiting half-groove; 21, air inlet connector; 22, positioning hole; 23, second sealing groove; 24, second limiting half-groove; 31, first heat conduction sleeve; 32, second heat conduction sleeve; 311, first connecting lug; 321, second connecting lug; 51, flow detection device; 52, pressure regulating device; 53, stop valve; 71, pressure relief valve; 301, positioning through hole; 10, first cavity; 20, second cavity; 30, first base material; 40, second base material. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0037] In the description of the utility model, it should be noted that if the terms such as 'upper', 'lower', 'inner', 'outer' and the like indicating the orientation or position relationship appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model to having a specific orientation, being constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, if the terms such as 'first','second' and the like appear, they are also only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, in the description of the utility model, unless otherwise explicitly limited, the terms'mounting', 'connection', 'connection' and 'connecting piece' should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with the specific circumstances.

[0039] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0040] The present embodiment relates to a test device for testing the durability of the bonding interface on the test piece, and is beneficial to improve the accuracy of the durability test result of the bonding interface.

[0041] In the overall structure, referring to Figures 1 to 3 The test device of the present embodiment comprises a test box 1 and an inflation pipeline 5 connecting the test box 1 with an external air source 6.

[0042] The test box 1 comprises a first shell 101 and a second shell 102 which are connected together by snap-fit, and the test piece 2 can be clamped between the first shell 101 and the second shell 102, and a first cavity 10 is formed between the first shell 101 and the test piece 2, and a second cavity 20 is formed between the second shell 102 and the test piece 2. The first cavity 10 is used to contain the test solution for soaking the adhesive interface, and the second cavity 20 is communicated with the air charging pipeline 5, and the external air source 6 can introduce the gas with preset pressure into the second cavity 20.

[0043] At this time, in the structure as above, the test piece 2 is clamped and fixed by the first shell 101 and the second shell 102 which are provided, and the structure is simple and easy to manufacture, and the assembly of the test device is more convenient. Moreover, the test piece 2 clamped between the first shell 101 and the second shell 102 divides the test box 1 into the first cavity 10 and the second cavity 20, the test solution in the first cavity 10 is used to soak the adhesive interface, and the gas with preset pressure is introduced into the second cavity 20, which is beneficial to the durability real-time test of the adhesive interface on the test piece 2 in the soaking state, so as to accurately determine the failure time and improve the accuracy of the test result.

[0044] Based on the overall structure as above, in detail, continuing to refer to Figures 1 to 3 As a preferred embodiment, in the embodiment, the test box 1 is in a cylindrical shape in the overall structure, and comprises a first shell 101 and a second shell 102 which are connected by snap-fit. The first shell 101 is preferably made of PTFE (polytetrafluoroethylene), which has good corrosion resistance. The material of the second shell 102 can be the same as or different from that of the first shell 101, and of course, as a preferred, the material of the second shell 102 is the same as that of the first shell 101, i.e. also made of PTFE, so that the overall quality of the test box 1 is lighter, and the manufacturing cost is lower.

[0045] It should be noted that the test solution in the first cavity 10 can be water, acid solution or alcohol solution. The gas introduced into the second cavity 20 can be nitrogen or air. It should also be noted that the test box 1 can also be in a cuboid shape in addition to the cylindrical shape, which is not limited in the embodiment. It should also be noted that the preset pressure mentioned above can be set according to the pressure required to be borne by the test piece 2.

[0046] Referring to Figure 6 and Figure 7As shown, the test piece 2 in this embodiment, as an exemplary structure, includes a first substrate 30 and a second substrate 40. The first substrate 30 is U-shaped with a through-hole in the center. The second substrate 40 covers the through-hole and is bonded to the first substrate 30 with an adhesive. The overlapping portion of the first substrate 30 and the second substrate 40 constitutes the bonding interface. In specific implementation, this bonding interface must be completely submerged in the test solution.

[0047] It is worth noting that the first substrate 30 can be, for example, a frame membrane, and the second substrate 40 can be, for example, a frame membrane, a proton exchange membrane, or a metal plate (bipolar plate). It can be understood that the first substrate 30 and the second substrate 40 can be made of different materials or the same material, and the specific choice can be made according to the bonding interface to be tested.

[0048] As a preferred embodiment, in this embodiment, a positioning structure is provided between the first housing 101 and the second housing 102, which can position the test piece 2 on the first housing 101 or the second housing 102.

[0049] In some feasible embodiments, preferably, the positioning structure includes a positioning post 15 disposed on one of the first housing 101 and the second housing 102, and a positioning hole 22 disposed on the other of the first housing 101 and the second housing 102. When the first housing 101 and the second housing 102 are fastened together, the positioning post 15 is inserted into the positioning hole 22, and the positioning post 15 positions the test piece 2 on the first housing 101 or the second housing 102.

[0050] In this structure, the positioning structure adopts positioning post 15 and positioning hole 22. Its structure is simple and easy to manufacture. When the first shell 101 and the second shell 102 are fastened together, the positioning post 15 and the positioning hole 22 are used to make the test piece 2 better positioned on the first shell 101 or the second shell 102.

[0051] For details, please refer to Figure 4 and Figure 5As shown in the drawings, the first shell 101 is provided with positioning columns 15, and the positioning columns 15 are preferably two diagonally arranged. Corresponding to the positioning columns 15, the second shell 102 is provided with positioning holes 22, and the positioning holes 22 are also two diagonally arranged. Meanwhile, the to-be-tested piece 2 is provided with positioning through holes 301, and the positioning through holes 301 are also two diagonally arranged. In the specific implementation, the positioning through holes 301 on the to-be-tested piece 2 are sleeved on the positioning columns 15 of the first shell 101, and then the first shell 101 and the second shell 102 are buckled together, so that the positioning columns 15 on the first shell 101 are inserted into the positioning holes 22 on the second shell 102, and thus the to-be-tested piece 2 is clamped between the first shell 101 and the second shell 102.

[0052] It can be understood that, in addition to setting the positioning columns 15 on the first shell 101 and setting the positioning holes 22 on the second shell 102, the positions of the positioning columns 15 and the positioning holes 22 can also be interchanged, that is, setting the positioning holes 22 on the first shell 101 and setting the positioning columns 15 on the second shell 102, positioning the to-be-tested piece 2 on the second shell 102, and then inserting and cooperating the positioning columns 15 and the positioning holes 22, so that the to-be-tested piece 2 is clamped between the first shell 101 and the second shell 102, which is also feasible.

[0053] In the embodiment, in order to ensure the sealing between the to-be-tested piece 2 and the first shell 101 and the second shell 102, as shown in the drawings, Figure 4 and Figure 5 the first shell 101 is provided with a first sealing member, and the first sealing member is used for sealing the gap between the first shell 101 and the to-be-tested piece 2. Moreover, the second shell 102 is also provided with a second sealing member, and the second sealing member is used for sealing the gap between the second shell 102 and the to-be-tested piece 2.

[0054] At this time, the first sealing member can better seal the first shell 101 and the to-be-tested piece 2, and can effectively prevent the leakage of the test solution. The second sealing member can better seal the second shell 102 and the to-be-tested piece 2, and can effectively prevent the leakage of the gas. Moreover, the cooperation of the first sealing member and the second sealing member can further improve the sealing between the to-be-tested piece 2 and the first shell 101 and the second shell 102, thereby further improving the accuracy of the durability test result.

[0055] And in the specific implementation, in order to improve the reliability of the installation of the first sealing member on the first shell 101 and the reliability of the installation of the second sealing member on the second shell 102, in the embodiment, a first sealing groove 16 is arranged on the fastening end face of the first shell 101, and the first sealing member is installed in the first sealing groove 16. Similarly, a second sealing groove 23 is arranged on the fastening end face of the second shell 102, and the second sealing member is installed in the second sealing groove 23. Moreover, the first sealing member and the second sealing member are preferably sealing rings, which are widely used and have good sealing effect.

[0056] It should be pointed out that, in addition to arranging the first sealing member on the first shell 101 and the second sealing member on the second shell 102, it is also possible to arrange only the first sealing member on the first shell 101 or only the second sealing member on the second shell 102.

[0057] In the embodiment, as a preferred embodiment, the test box 1 of the embodiment further comprises a tightening member 4, and the first shell 101 and the second shell 102 are connected together through the tightening member 4 after being fastened. Specifically, the tightening member 4 is preferably a stainless steel band, both ends of the stainless steel band are provided with connecting blocks, each connecting block is provided with a connecting hole, and the two ends of the stainless steel band are connected together through a threaded connecting member arranged in the two connecting holes, so that the stainless steel band can exert a fastening force on the outer circumferential surface of the first shell 101 and the second shell 102, thereby ensuring the reliability and sealing performance of the connection between the first shell 101 and the second shell 102.

[0058] As a further preferred embodiment, the tightening member 4 of the embodiment is a plurality of members arranged at intervals along the height direction of the test box 1, which can further ensure the reliability and sealing performance of the connection between the first shell 101 and the second shell 102.

[0059] Moreover, in order to facilitate the reliable installation of the tightening member 4, in the embodiment, a ring-shaped limiting groove for limiting the tightening member 4 is arranged on the outer circumferential surface of the test box 1, as shown in the figure. Figures 3 to 5 Specifically, a first limiting half-groove 17 is arranged on the outer circumferential surface of the first shell 101, and a second limiting half-groove 24 is arranged on the outer circumferential surface of the second shell 102. At this time, in the fastened and connected state of the first shell 101 and the second shell 102, the first limiting half-groove 17 and the second limiting half-groove 24 correspondingly form the above-mentioned ring-shaped limiting groove, and the stainless steel band is installed in the ring-shaped limiting groove and tightened on the outer circumferential surface of the test box 1.

[0060] It can be understood that in the embodiment, the number of the annular limiting grooves matches the number of the tightening members 4, that is, the annular limiting grooves are also arranged in two along the height direction of the test box 1. The first limiting half-groove 17 and the second limiting half-groove 24 are respectively arranged on the first shell 101 and the second shell 102. In the buckling connection state of the first shell 101 and the second shell 102, the two first limiting half-grooves 17 and the two second limiting half-grooves 24 are connected one by one to form the above-mentioned annular limiting groove.

[0061] In some possible embodiments, as a preferred embodiment, as shown in Figure 2 and Figure 3 In the embodiment, the heating device and the temperature detection device 11 are also arranged on the test box 1. The heating device is used for heating the test box 1, and the temperature detection device 11 is used for detecting the temperature in the first cavity 10. By using the heating device, the test solution in the test box 1 can be heated, and by using the temperature detection device 11, the temperature in the test box 1 can be detected in real time, so that the temperature required for durability test can be ensured, and the accuracy of the test result can be improved.

[0062] Specifically, the heating device comprises a heat conduction sleeve 3 arranged on the test box 1 and a heating sheet arranged on the heat conduction sleeve 3. The heat conduction sleeve 3 provides a mounting position for the heating sheet, and facilitates the fixation of the heating sheet on the test box 1. At the same time, the heat conduction sleeve 3 transmits heat to the test box 1, so as to heat the inside of the test box 1.

[0063] Referring to Figure 2 The heat conduction sleeve 3 comprises a first heat conduction sleeve 31 and a second heat conduction sleeve 32 arranged on the outer circumferential surface of the box body. The two ends of the first heat conduction sleeve 31 are respectively provided with first connecting lugs 311, and the two ends of the second heat conduction sleeve 32 are respectively provided with second connecting lugs 321. When the first heat conduction sleeve 31 and the second heat conduction sleeve 32 are buckled, the first connecting lugs 311 and the second connecting lugs 321 at the corresponding ends abut against each other and are connected together by a threaded connecting member passing through the connecting holes in the first connecting lugs 311 and the second connecting lugs 321.

[0064] The heating sheet is specifically connected to the outer surface of the heat conduction sleeve 3. The heating sheet can be an electric heating sheet in the prior art. In specific implementation, the temperature detection device 11 is preferably a temperature sensor, which is arranged on the top of the first shell 101. In addition, it is worth mentioning that the temperature of the test liquid in the test box 1 can be set to be between 85℃ and 90℃, and can be set to be 85℃, 86℃, 87℃, 88℃, 89℃ or 90℃. Of course, the temperature of the test liquid in the test box 1 can also be set according to the specific test requirements.

[0065] In the embodiment, the top of the first cavity 10 is not open, and the top of the first shell 101 is also provided with a waterproof and breathable device 12 for balancing the pressure inside and outside the test box 1. In specific implementation, the waterproof and breathable device 12 is a waterproof and breathable valve, and of course it can also be a waterproof and breathable film, as long as it can balance the pressure inside and outside the test box 1.

[0066] In order to facilitate the discharge of the test solution in the first cavity 10, in the embodiment, the bottom of the first shell 101 is also provided with a drain port. The drain port is provided with a drain pipeline 13, and the drain pipeline 13 is provided with a solenoid valve 14 for opening or closing the drain pipeline 13, so as to facilitate the discharge of the test solution in the first cavity 10 into a designated container.

[0067] In addition, in the embodiment, the top of the second shell 102 is provided with an air inlet joint 21, one end of the above-mentioned air charging pipeline 5 is connected with an external air source 6, and the other end is connected with the air inlet joint 21. As a preferred embodiment, in the embodiment, a flow detection device 51 is arranged on the air charging pipeline 5. The flow detection device 51 can be a flow meter, for example. At this time, by arranging the flow detection device 51, the flow of the gas flowing in the air charging pipeline 5 can be detected, so as to facilitate the timely determination of the failure of the test piece 2 and the accurate determination of the failure time of the test piece 2.

[0068] On the basis of arranging the flow detection device 51, in the embodiment, a stop valve 53 and a pressure regulating device 52 are arranged on the air charging pipeline 5. The stop valve 53 is used to open or close the air charging pipeline 5, and the pressure regulating device 52 is used to regulate the gas pressure in the air charging pipeline 5.

[0069] At the same time, in the embodiment, the air charging pipeline 5 is also connected with a pressure relief pipeline 7 in parallel, and the pressure relief pipeline 7 is provided with a pressure relief valve 71. The arrangement of the pressure relief pipeline 7 and the pressure relief valve 71 is beneficial to the discharge through the pressure relief valve 71 and the pressure relief pipeline 7 when the gas pressure in the air charging pipeline 5 is too high, so as to ensure the safety of the gas circuit system in the durability test.

[0070] The test device of the embodiment also comprises a control device, wherein the signal line of the temperature detection device 11, the signal line of the flow detection device 51, the signal line of the pressure regulating device 52 and the information line of the pressure relief valve 71 are connected to the control device. This is conducive to real-time monitoring and feedback and accurate control of the durability test process. In addition, the test device of the embodiment also comprises an alarm device connected to the control device, which is used to issue an alarm prompt when the test piece 2 fails. Specifically, the alarm device may, for example, be an indicator light or a buzzer connected to the control device, which can issue an alarm prompt when the test piece 2 fails. It is worth noting that the control device and the alarm device of the embodiment can both refer to existing mature technologies.

[0071] In specific use, the test device of the embodiment first positions the test piece 2 on the first shell 101, then connects the first shell 101 and the second shell 102 together, so that the test piece 2 is clamped and fixed between the first shell 101 and the second shell 102. Then, the test solution is injected into the first cavity 10 through the installation port of the waterproof air permeable valve on the first shell 101, and after the injection is completed, the waterproof air permeable valve is installed. Then, the gas with a preset pressure is introduced into the second cavity 20 through the external gas source 6. At this time, if the bonding interface state of the test piece 2 is good, the gas in the second cavity 20 does not diffuse to the first cavity 10 or the diffusion amount is very small, and the controller records the starting time point of the durability test in the standard range. The standard range can be determined according to the set leakage amount standard, and the standard range is different under different working conditions of different test pieces 2.

[0072] In the durability test, the external gas source 6 continuously supplies gas to maintain pressure, and the controller determines in real time whether the leakage amount is within the set qualified range. If the test piece 2 fails, the gas in the second cavity 20 diffuses and is discharged to the atmosphere through the waterproof air permeable valve, at which time the leakage amount value read by the flowmeter exceeds the set standard, and the controller records the failure time point and issues an alarm prompt.

[0073] The test device of the embodiment has the advantages of simple structure, easy processing and manufacturing, and convenient assembly, and is also conducive to real-time durability testing of the bonding interface on the test piece 2 in the soaking state, thereby facilitating accurate determination of the failure time and improving the accuracy of the test results.

[0074] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A testing device for testing the durability of a bonding interface on a test piece (2), characterized in that: it comprises a testing box (1) and a gas charging pipeline (5) connecting the testing box (1) with an external gas source (6); the testing box (1) comprises a first shell (101) and a second shell (102) connected together, the test piece (2) can be clamped between the first shell (101) and the second shell (102), a first cavity (10) is formed between the first shell (101) and the test piece (2), and a second cavity (20) is formed between the second shell (102) and the test piece (2); the first cavity (10) is used to hold a test solution for soaking the bonding interface, the second cavity (20) is communicated with the gas charging pipeline (5), and the external gas source (6) can introduce gas with a preset pressure into the second cavity (20).

2. The testing device according to claim 1, characterized in that: a positioning structure is arranged between the first shell (101) and the second shell (102); and the positioning structure can position the test piece (2) on the first shell (101) or the second shell (102).

3. The testing device according to claim 2, characterized in that: the positioning structure comprises a positioning column (15) arranged on one of the first shell (101) and the second shell (102), and a positioning hole (22) arranged on the other one of the first shell (101) and the second shell (102); when the first shell (101) and the second shell (102) are connected together, the positioning column (15) is inserted into the positioning hole (22), and the positioning column (15) positions the test piece (2) on the first shell (101) or the second shell (102).

4. The testing device according to claim 1, characterized in that: a first sealing member is arranged on the first shell (101), and the first sealing member is used to seal the gap between the first shell (101) and the test piece (2); and / or a second sealing member is arranged on the second shell (102), and the second sealing member is used to seal the gap between the second shell (102) and the test piece (2).

5. The testing device according to claim 1, characterized in that: a heating device and a temperature detection device (11) are arranged on the testing box (1); the heating device is used to heat the testing box (1), and the temperature detection device (11) is used to detect the temperature in the first cavity (10).

6. The testing device according to claim 5, characterized in that: the heating device comprises a heat conduction sleeve (3) arranged on the testing box (1), and a heating sheet arranged on the heat conduction sleeve (3).

7. The testing device according to claim 1, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The first shell (101) is provided with a waterproof and breathable device (12); The waterproof and breathable device (12) is used for balancing the pressure inside and outside the test box (1).

8. The test device according to claim 1, characterized in that: The test box (1) further comprises a tightening member (4); The first shell (101) and the second shell (102) are connected together through the tightening member (4) after buckling.

9. The test device according to any one of claims 1 to 8, characterized in that: The inflation pipeline (5) is provided with a flow detection device (51).

10. The test device according to claim 9, characterized in that: The inflation pipeline (5) is provided with a stop valve (53) and a pressure adjusting device (52); and / or, The inflation pipeline (5) is connected in parallel with a pressure relief pipeline (7), and the pressure relief pipeline (7) is provided with a pressure relief valve (71).

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