High-voltage porcelain dielectric capacitor voltage resistance nitrogen test tooling

Abstract

The utility model discloses a kind of high-pressure porcelain dielectric capacitor withstand voltage nitrogen test tool, it is related to capacitor testing device field, comprising: sealed shell, it is provided with sealed containing space in sealed shell, inert gas can be filled in sealed containing space;Bearing table, for installing at least one capacitor to be measured;Base, for installing at least one test electrode, single test electrode is set to power after can be connected with the electrode of single capacitor to be measured;Wherein, base can be moved in sealed shell, to make base close or away from bearing table.The utility model fills inert gas as test medium in sealed shell, and by movable base drives test electrode and capacitor electrode to be measured to contact or separate, to avoid capacitor after testing in liquid inert medium needs long time cleaning, production efficiency is low and multiple transport cleaning is prone to porcelain body loss of purpose.

Description

Technical Field

[0001] This utility model relates to the field of capacitor testing devices, specifically to a nitrogen gas testing fixture for high-voltage ceramic capacitor withstand voltage. Background Technology

[0002] Multilayer ceramic capacitors (MLCCs) are a type of ceramic dielectric capacitor. They are made by adding electronic ceramic powder to an organic binder system to form ceramic films, which are then screen-printed with a metal internal electrode paste. The ceramic films are then interleaved, stacked, and cut to form a green body, sintered at high temperature, and finally sealed with metal terminals, creating a monolithic structure, hence the name monolithic capacitor. Its main structure consists of three parts: a ceramic dielectric, a metal internal electrode, and metal terminal electrodes. A typical structural diagram is shown below. Figure 1 As shown.

[0003] MLCCs (Multi-Layer Ceramic Capacitors) are widely used in aerospace, aviation, weaponry, and consumer electronics due to their large capacitance-to-volume ratio, dense structure, low loss, non-polarity, convenient storage, and suitability for surface mounting. High-voltage MLCCs (UR≥1kV), with their high operating frequency and high high-frequency / RF dielectric strength, are widely used in switching power supplies and power amplifiers in satellites, radar, and other weaponry equipment for bypassing, coupling, impedance matching, and DC blocking. With technological advancements and wider adoption, the demand for high-voltage MLCCs is increasing.

[0004] After ceramic capacitors are manufactured, they must undergo electrical performance testing to confirm whether they meet the usage requirements. Withstand voltage testing is one of the main electrical performance tests, requiring a voltage increase rate to the required test voltage. Withstand voltage is a key indicator of the reliability of ceramic capacitors; if there are defects in the capacitor's dielectric layer, breakdown or damage will occur during withstand voltage testing. For medium and high voltage products, due to the high test voltage, surface air breakdown and arcing are prone to occur during withstand voltage testing. Surface air breakdown does not characterize the capacitor's withstand voltage performance; therefore, high-voltage ceramic capacitors must undergo withstand voltage testing in an inert dielectric.

[0005] Existing high-voltage ceramic capacitors are tested in a liquid inert medium. After testing, the capacitors retain inert dielectric residue, requiring prolonged immersion in a specialized cleaning agent. This increases production steps, lengthens cleaning time, and reduces production efficiency. Even after cleaning, some products still have residue on the ceramic surface, necessitating multiple cleaning cycles. Furthermore, high-voltage ceramic capacitors are often large products, and repeated handling and agitation of the cleaning agent during the cleaning process can easily lead to ceramic defects.

[0006] In view of the above, this application is hereby submitted. Utility Model Content

[0007] The purpose of this utility model is to provide a nitrogen gas testing fixture for high voltage ceramic capacitor withstand voltage. By filling the sealed shell with inert gas as the testing medium, and by using a movable base to drive the test electrode to contact or separate from the electrode of the capacitor under test, the technical problems of the prior art, such as the need for long-term cleaning after testing the capacitor in a liquid inert medium, low production efficiency, and the easy damage to the ceramic body caused by multiple transfers and cleaning, are solved.

[0008] This utility model embodiment is achieved through the following technical solution: This utility model embodiment provides a nitrogen gas withstand voltage test fixture for high-voltage ceramic capacitors, including: A sealed housing with a sealed receiving space inside, which can be filled with inert gas; A support platform, installed within a sealed enclosure, is used to mount at least one capacitor to be tested; The base, set within a sealed containment space, is used to mount at least one test electrode. Each test electrode, when configured as a power source, can be connected to the electrode of a single capacitor under test. The base can move within the sealed housing to move closer to or further away from the support platform, and to move the test electrode closer to or further away from the electrode of the capacitor under test.

[0009] Optionally, a slide rail is provided at the bottom of the sealed housing, and the base is installed inside the slide rail, allowing the base to slide within the slide rail; When the base moves to connect with the electrode of the test electrode and the electrode of the capacitor under test, the base can be fixedly connected to the slide rail and / or the sealed housing by the first bolt.

[0010] Optionally, the support platform is detachably connected to the sealed housing, and the support platform can be disassembled or replaced when the base is moved away from the support platform.

[0011] Optionally, the test electrode includes a support portion and a connecting portion. The support portion is used to be mounted on a base, and the connecting portion is mounted on the support portion via an elastic member. The connecting portion is used to connect to the electrode of the capacitor under test. When the elastic component is compressed, the connecting part comes into contact with the electrode of the capacitor under test.

[0012] Optionally, the sealed housing includes a main housing and a sealing cover, the sealing cover being made of a transparent material, and the sealing cover being closedly connected with the main housing to form a sealed receiving space.

[0013] Optionally, the sealing cap is detachably connected to the main housing via at least one second bolt.

[0014] Optionally, the sealing housing is provided with a pressure relief port and an air inlet. The air inlet is configured to deliver external nitrogen into the sealed housing space, and the pressure relief port is configured to relieve pressure in the sealed housing space.

[0015] Optionally, a pressure gauge is installed on the external pipeline next to the air inlet, and the pressure gauge is set to regulate the nitrogen pressure introduced into the sealed containment space.

[0016] Optionally, a pressure relief valve may be provided at the pressure relief port.

[0017] Optionally, at least two capacitors to be tested are provided on the support platform, and at least two test electrodes are provided on the base.

[0018] Compared with the prior art, the embodiments of this utility model have the following advantages and beneficial effects: 1. The high-voltage withstand voltage nitrogen testing fixture for ceramic capacitors provided in this embodiment of the invention provides a sealed housing as a sealed mounting base for the support platform and the base. The support platform and the base are arranged opposite to each other within the housing, and the base and the sealed housing form a movable fit. The test electrode is insulated and fixed to the base and connected to an external power supply through a through-wall terminal. During testing, the capacitor to be tested is first placed in the positioning structure of the support platform. The base moves in a controlled manner, driving the test electrode to contact the capacitor electrode. After the housing is sealed, high-pressure nitrogen is injected to perform the withstand voltage test. After the test is completed, the sealed housing is opened, the base moves in the reverse direction to reset, and the capacitor is removed. This fixture uses a sealed housing to create a high-pressure nitrogen environment to replace the traditional liquid inert medium. The movable base drives the test electrode to achieve rapid engagement and disengagement with the capacitor to be tested, fundamentally eliminating the problem of dielectric adhesion on the capacitor surface after testing, eliminating the cleaning process and multiple transfer steps, avoiding the risk of ceramic body damage, and significantly improving production efficiency and product qualification rate.

[0019] 2. This utility model embodiment achieves rapid linear positioning and manual operation of the base and its test electrodes through slide rail guidance. When the test position is reached, the moving part is transformed into a rigid fixed structure by the tightening action of the first bolt. This ensures the positional accuracy of the test electrode during contact with the capacitor electrode, as well as the stability and safety of the electrical connection during high-voltage testing. At the same time, the structure is simple and reliable, requiring no complex power source, thus improving the ease of operation and reliability of the tooling.

[0020] 3. This utility model embodiment features a detachable support platform structure, which, through independent setup and multi-station layout, achieves flexible testing capabilities for the tooling. Before testing, the corresponding support platform is selected and fixed according to the capacitor specifications; after testing, the support platform can be quickly replaced for the next round of testing or to switch product models after the base is removed, avoiding the cost and downtime of replacing the entire tooling. Simultaneously, multi-station parallel testing significantly improves testing capacity per unit time, while the detachable feature ensures convenient cleaning and maintenance of the positioning structure. If the positioning surface is worn or contaminated after long-term use, only the support platform needs to be replaced to restore testing accuracy, extending the service life of the tooling body and reducing overall operating costs.

[0021] 4. The transparent sealing cover integrates the visual monitoring function into the sealed housing structure. Operators can intuitively confirm the alignment accuracy of the test electrode and capacitor electrode during the test preparation stage, observe the internal status in real time during the test, promptly detect problems such as poor contact and abnormal discharge, and stop the test, thus avoiding test failure and product damage caused by positional deviation or sudden failure.

[0022] In general, the embodiments of this utility model provide a nitrogen gas testing fixture for high voltage ceramic capacitor withstand voltage. By filling the sealed housing with inert gas as the testing medium, and by using a movable base to drive the testing electrode to contact or separate from the electrode of the capacitor under test, the purpose of avoiding the need for long-term cleaning after testing the capacitor in a liquid inert medium, low production efficiency, and the risk of ceramic body damage from repeated transfer and cleaning is achieved. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a ceramic capacitor in the prior art; Figure 2 A top view of the nitrogen testing fixture provided in an embodiment of this utility model; Figure 3 A front view of the nitrogen testing fixture provided in an embodiment of this utility model; Figure 4 A side view of the nitrogen testing fixture provided in an embodiment of this utility model; Figure 5 This is a schematic diagram of the tooling electrode and the contact structure of the product under test provided in an embodiment of the present invention.

[0025] The attached diagram shows the markings and corresponding component names: 1-Sealed housing, 2-Bearing platform, 3-Capacitor under test, 4-Base, 5-Test electrode, 6-Slide rail, 7-First bolt, 8-Support, 9-Connecting part, 10-Main housing, 11-Sealing cover, 12-Second bolt, 13-Pressure relief port, 14-Air inlet, 15-Pressure gauge, 16-Line mounting hole, 17-Pressure valve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Example

[0030] Combined with reference Figure 2 , Figure 3 and Figure 4 As shown in the figure, this utility model embodiment provides a nitrogen gas withstand voltage test fixture for high-voltage ceramic capacitors, including a sealed housing 1, a support platform 2, and a base 4. The sealed housing 1 has a sealed accommodating space that can be filled with inert gas. The support platform 2 is installed within the sealed accommodating space for mounting at least one capacitor 3 to be tested. The base 4 is located within the sealed accommodating space for mounting at least one test electrode 5. Each test electrode 5, when configured as a power source, can be connected to the electrode of a single capacitor 3 under test. The base 4 is movable within the sealed housing 1, allowing it to move closer to or further away from the support platform 2, and consequently, moving the test electrode 5 closer to or further away from the electrode of the capacitor 3 under test.

[0031] Specifically, the sealed housing 1 forms a sealed containment space inside, which is used to construct the inert gas environment required for high-pressure nitrogen testing, prevent gas leakage and isolate external air, and ensure the stability of nitrogen pressure and purity during the test, thereby avoiding air breakdown and arcing on the capacitor surface. The sealed housing 1 is provided with multiple line mounting holes 16 for line installation.

[0032] The support platform 2 is fixedly installed at the bottom of the sealed housing 1, providing a stable support platform for positioning and clamping at least one capacitor 3 to be tested, ensuring that the capacitor is fixed in position during the test and that its electrodes face the test electrode 5.

[0033] The base 4 is movably installed in the sealed housing space, serving as the mechanical support and electrical connection carrier for the test electrode 5. It can move within the sealed housing 1 to achieve precise alignment and separation between the test electrode 5 and the electrode of the capacitor under test 3.

[0034] Test electrode 5 is mounted on base 4 facing the support platform 2 and is connected to an external withstand voltage test power supply via a wire. When base 4 moves to the extreme position close to support platform 2, test electrode 5 forms reliable physical contact and electrical conduction with the metal terminal electrode of the corresponding capacitor under test 3 to apply test voltage. After the test is completed, it can move with base 4 to disengage from contact.

[0035] During the test, the capacitor to be tested 3 is first placed in the positioning structure of the support platform 2. The base 4 is moved in a controlled manner to drive the test electrode 5 to contact the capacitor electrode. After the shell is sealed, high-pressure nitrogen is filled in for the withstand voltage test. After the test is completed, the sealed shell is opened, the base 4 moves in the opposite direction to reset, and the capacitor is taken out.

[0036] This utility model embodiment uses a sealed housing 1 to create a high-pressure nitrogen environment to replace the traditional liquid inert medium. The movable base 4 drives the test electrode 5 to achieve rapid connection and separation with the capacitor under test 3, which fundamentally eliminates the problem of dielectric adhesion on the capacitor surface after testing, saves the cleaning process and multiple transfer steps, avoids the risk of ceramic body damage, and significantly improves production efficiency and product qualification rate.

[0037] For example, the bottom of the sealed housing 1 is provided with a slide rail 6, and the base 4 is installed in the slide rail 6. The base 4 can slide in the slide rail 6. When the base 4 moves to connect the test electrode 5 with the electrode of the capacitor under test 3, the base 4 can be fixedly connected to the slide rail 6 and / or the sealed housing 1 by the first bolt 7.

[0038] Specifically, refer to Figure 1 As shown, the slide rail 6 is located at the bottom of the sealed housing 1 and extends along the moving direction of the base 4, providing precise linear guidance and mechanical support for the base 4. This ensures that the base 4 maintains a stable trajectory and posture during movement, achieving precise alignment between the test electrode 5 and the electrode of the capacitor under test 3. The bottom of the base 4 and the slide rail 6 are slidably fitted together, with the base 4 entirely embedded in the guide groove of the slide rail 6. Under external driving force, the base 4 can smoothly slide along the length of the slide rail 6, thereby moving the test electrode 5 closer to or further away from the capacitor under test 3 on the support platform 2, completing the rapid adjustment and switching of the test position.

[0039] In a preferred embodiment of this utility model, the support platform 2 is detachably connected to the sealed housing 1. When the base 4 moves away from the support platform 2, the support platform 2 can be disassembled or replaced. By replacing different support platforms 2, capacitors of different sizes and specifications can be tested. Furthermore, the support platform 2 has multiple capacitor installation positions, which can meet the simultaneous testing of multiple capacitors.

[0040] Specifically, the support platform 2 and the sealed housing 1 are connected by a detachable method (such as bolt connection, snap connection, or positioning pin engagement) to achieve quick installation and disassembly of the support platform 2. When the base 4 moves the test electrode 5 to the extreme position away from the support platform 2, sufficient operating space is formed on the sides and above the support platform 2, allowing the operator to easily remove or reinstall the support platform 2 from the sealed housing 1 without disassembling other parts.

[0041] It should be noted that, in this embodiment of the invention, the support platform 2 can be configured with various specifications according to the size specifications (such as length, width, height, and electrode spacing) of the capacitor 3 to be tested. Each support platform 2 has a unified installation interface that matches the sealed housing 1. By replacing the support platform 2 with different specifications, the fixture can adapt to the testing needs of various high-voltage ceramic capacitors from micro to large, thus improving the versatility and applicability of the fixture.

[0042] The upper surface of the support platform 2 can be provided with multiple capacitor positioning and mounting positions (such as positioning grooves, positioning protrusions, or clamping structures) arranged in an array or linearly. Each mounting position corresponds to a set of test electrodes 5, and multiple capacitors 3 to be tested can be installed independently or in parallel. This multi-station design allows multiple capacitors to be tested simultaneously in a single inflation and sealing operation, improving the efficiency of batch testing and reducing gas consumption and the number of times the door is opened and closed.

[0043] Furthermore, referring to Figure 5 As shown, the test electrode 5 includes a support part 8 and a connecting part 9. The support part 8 is used to be mounted on the base 4, and the connecting part 9 is mounted on the support part 8 through an elastic member. The connecting part 9 is used to connect with the electrode of the capacitor 3 under test. When the elastic member is compressed, the connecting part 9 abuts against the electrode of the capacitor 3 under test.

[0044] Specifically, the fixing part, as the mechanical base of the electrode, undertakes the functions of electrical conduction and mechanical support. The connecting part 9 is the conductive end that actually contacts the capacitor electrode. It is floatingly mounted on the front end of the fixing part through an elastic component (such as a compression spring, disc spring, or elastic metal sheet), and can generate axial elastic displacement relative to the fixing part when pressure is applied. The elastic component (preferably a disc spring or cylindrical compression spring resistant to high temperature and high pressure) is built into the axial groove of the fixing part, and one end of it is connected to the reference plane at the bottom of the groove. The connecting part 9 preferably adopts a T-shaped or stepped shaft structure. Its smaller diameter mating section is inserted into the axial groove and connected to the movable end of the elastic component, while the larger diameter contact section is exposed for contact with the capacitor electrode. The mating section and the inner wall of the groove adopt a clearance fit to ensure smooth sliding and form an axially floating elastic buffer structure.

[0045] During operation, when the base 4 moves the test electrode 5 toward the support platform 2, the connecting part 9 first touches the metal end electrode of the capacitor under test 3. Then the base 4 continues to move forward, and the mating section of the connecting part 9 retracts into the axial groove. The elastic component is further compressed, generating a reverse elastic force, so that the connecting part 9 tightly abuts against the capacitor electrode with constant pressure, automatically compensating for the contact gap caused by uneven electrode surface or dimensional tolerance, while avoiding rigid impact damage to the capacitor ceramic body.

[0046] In a preferred embodiment of this utility model, the sealing housing 1 includes a main housing 10 and a sealing cover 11. The sealing cover 11 is made of a transparent material, and the sealing cover 11 is closedly connected with the main housing 10 to form a sealed receiving space. In this embodiment of the utility model, the main housing 10 serves as the fixed base of the sealing housing 1, providing overall structural support and pressure resistance. The transparent sealing cover 11 can be made of a highly transparent and high-pressure resistant transparent material (such as tempered glass or polycarbonate), serving as a movable sealing cover component of the sealing housing 1. The transparent material allows the operator to directly observe the contact state between the test electrode 5 and the electrode of the capacitor 3 under test within the sealed receiving space, the movement position of the base 4, and whether abnormal discharge or arcing occurs during the test without opening the sealing cover 11, facilitating real-time monitoring and fault diagnosis.

[0047] The transparent sealing cover 11 can be closed and connected to the flange face of the top opening of the main housing 10 by means of hinge, clamp or bolt fastening. A high temperature and high pressure resistant O-ring or flat sealing gasket is provided between the two. The airtight seal is achieved by compression deformation to ensure that the high pressure nitrogen gas is filled in without leakage and to maintain a stable inert test environment.

[0048] More preferably, the sealing cover 11 is detachably connected to the main housing 10 by at least one second bolt 12. This bolted connection structure enables quick disassembly and reliable sealing between the sealing cover 11 and the main housing 10. Before testing, a stable inert gas environment can be established by evenly tightening the second bolt 12. After testing, the sealing cover 11 can be opened by loosening the bolt to remove or place the capacitor or replace the support platform 2. The operation is simple and quick. Compared with clamp or hinge structures, the bolted connection provides a more uniform sealing pressure distribution and higher connection strength, reducing the risk of high-pressure gas leakage.

[0049] Furthermore, the sealed housing 1 is provided with a pressure relief port 13 and an air inlet 14. The air inlet 14 is configured to deliver external nitrogen gas into the sealed housing space, and the pressure relief port 13 is configured to relieve pressure in the sealed housing space.

[0050] For example, the air inlet 14 is provided on the side wall or top of the sealed housing 1 via a threaded or flanged interface. Its internal channel communicates with the sealed receiving space, and its external connection is via a high-pressure hose to a nitrogen source (such as a nitrogen cylinder or centralized gas supply system). A pressure reducing valve and a check valve can be configured on the pipeline to control the inlet pressure and prevent gas backflow. The pressure relief port 13 is provided on the side wall of the sealed housing 1, and its internal channel also communicates with the sealed receiving space. Its external connection is to a pressure relief pipeline and a manual ball valve or needle valve (pressure relief valve) is installed. The function of the pressure relief port 13 is to slowly release the high-pressure nitrogen in the sealed space after the test is completed, reducing the pressure to atmospheric pressure before opening the sealing cover 11 to prevent safety accidents caused by pressurized operation. At the same time, this structure can also quickly relieve pressure in emergency situations.

[0051] Preferably, a pressure gauge 15 is installed on the external pipeline next to the air inlet 14. The pressure gauge 15 can be controlled by a pressure valve 17, which is configured to regulate the nitrogen pressure entering the sealed containment space. Specifically, a high-precision, shock-resistant pressure gauge 15 is installed in parallel or in series on the external pipeline upstream of the air inlet 14, with the dial facing the operator for easy observation. The pressure gauge 15 can be reliably connected to the air inlet pipeline via a threaded tee connector or a gauge base. A buffer tube or damping screw is preferably configured at the connection point to prevent pressure pulses during nitrogen filling from damaging the internal mechanism of the pressure gauge 15, ensuring stable and reliable pressure readings.

[0052] This embodiment of the invention transforms nitrogen pressure control from empirical to precise, visual control through the setting of pressure gauge 15. Operators can intuitively and quantitatively grasp the pressure state within the sealed space, avoiding problems such as residual air arcing due to insufficient pressure or sealing risks caused by excessive pressure, thus improving the consistency and repeatability of test process parameters. Simultaneously, real-time pressure monitoring provides a safety early warning function for the testing process; any seal failure or abnormal leakage can be detected promptly, ensuring the safety of high-pressure testing and reducing accidents such as batch product scrapping and tooling damage caused by pressure runaway.

[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the utility model.

Claims

1. A nitrogen gas testing fixture for the withstand voltage of a high-voltage ceramic capacitor, characterized in that, include: A sealed housing (1) is provided inside the sealed housing (1), and the sealed receiving space can be filled with inert gas; A support platform (2) is installed in the sealed accommodating space for mounting at least one capacitor to be tested (3). The base (4) is disposed within the sealed accommodating space for mounting at least one test electrode (5), and the individual test electrode (5) can be connected to the electrode of the individual capacitor under test (3) after being set as a power source; The base (4) is movable within the sealed housing (1) to move the base (4) closer to or further away from the support platform (2) and to move the test electrode (5) away from or closer to the electrode of the capacitor under test (3).

2. The nitrogen gas testing fixture for high-voltage ceramic capacitor withstand voltage as described in claim 1, characterized in that, The bottom of the sealed housing (1) is provided with a slide rail (6), and the base (4) is installed in the slide rail (6) and the base (4) can slide in the slide rail (6); When the base (4) moves to connect the test electrode (5) with the electrode of the capacitor under test (3), the base (4) can be fixedly connected to the slide rail (6) and / or the sealing housing (1) by the first bolt (7).

3. The nitrogen gas testing fixture for high-voltage ceramic capacitor withstand voltage according to claim 2, characterized in that, The support platform (2) is detachably connected to the sealing housing (1). When the base (4) moves away from the support platform (2), the support platform (2) can be disassembled or replaced.

4. The nitrogen gas testing fixture for high-voltage ceramic capacitor withstand voltage according to claim 1, characterized in that, The test electrode (5) includes a support part (8) and a connecting part (9). The support part (8) is used to be mounted on the base (4). The connecting part (9) is mounted on the support part (8) through an elastic member. The connecting part (9) is used to connect to the electrode of the capacitor (3) under test. When the elastic member is compressed, the connecting part (9) abuts against the electrode of the capacitor to be tested (3).

5. The nitrogen gas testing fixture for high-voltage ceramic capacitor withstand voltage according to claim 1, characterized in that, The sealed housing (1) includes a main housing (10) and a sealing cover (11). The sealing cover (11) is made of transparent material and is closedly connected to the main housing (10) to form a sealed receiving space.

6. The nitrogen gas testing fixture for high-voltage ceramic capacitor withstand voltage according to claim 5, characterized in that, The sealing cap (11) is detachably connected to the main housing (10) by at least one second bolt (12).

7. The nitrogen gas testing fixture for high-voltage ceramic capacitor withstand voltage according to claim 1, characterized in that, The sealed housing (1) is provided with a pressure relief port (13) and an air inlet (14). The air inlet (14) is configured to deliver external nitrogen into the sealed housing space, and the pressure relief port (13) is configured to relieve pressure in the sealed housing space.

8. The nitrogen gas testing fixture for high-voltage ceramic capacitor withstand voltage according to claim 7, characterized in that, A pressure gauge (15) is installed on the external pipeline next to the air inlet (14), and the pressure gauge (15) is configured to regulate the pressure of nitrogen gas introduced into the sealed accommodating space.

9. The nitrogen gas testing fixture for high-voltage ceramic capacitor withstand voltage according to claim 7, characterized in that, A pressure relief valve is provided at the pressure relief port (13).

10. The nitrogen gas testing fixture for the withstand voltage of a high-voltage ceramic capacitor according to claim 1, characterized in that, At least two capacitors (3) to be tested are provided on the support platform (2), and at least two test electrodes (5) are provided on the base (4).

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