Withstand voltage detection device for low-stray-inductance vehicle gauge capacitor semi-finished product

Abstract

The utility model relates to a withstand voltage detection device for a low-stray-inductance vehicle gauge capacitor semi-finished product. The withstand voltage detection device comprises a test assembly and a working turntable capable of rotating in the horizontal direction. The test assembly comprises a top plate and a bottom plate, the bottom of the top plate is provided with a first test part, the first test part can axially move on the top plate, the top of the bottom plate is provided with a second test part, and the second test part can axially move on the bottom plate. The first test part comprises a capacitance test pin I, a high voltage generation test pin I and a voltage monitoring test pin I, and the second test part comprises a capacitance test pin II, a high voltage generation test pin II and a voltage monitoring test pin II. According to the invention, a plurality of capacitor semi-finished products can be rapidly detected. The rotation of the working turntable can realize the rapid switching of the capacitors among different test stations, thereby avoiding the tedious process of carrying the capacitors one by one and adjusting the positions of the capacitors in a traditional detection mode, greatly reducing the detection time, and improving the detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of capacitor testing technology, and in particular to a withstand voltage testing device for semi-finished automotive-grade capacitors with low impurity inductance. Background Technology

[0002] In the capacitor manufacturing process, performance testing of semi-finished products is a crucial step in ensuring the quality of the final product. This is especially true for low-stray-inductance automotive-grade capacitors, whose applications have even more stringent performance requirements; therefore, accurate semi-finished product testing is of paramount importance.

[0003] Currently, existing capacitor semi-finished product testing technologies have many problems. During testing, the position of the capacitor and the test probes need to be manually adjusted multiple times, which not only consumes a lot of time and reduces testing efficiency, but also makes it difficult to guarantee positioning accuracy. Furthermore, traditional testing devices have a low degree of automation, requiring significant manual intervention in many steps, increasing the possibility of human error, and also making it difficult to meet the demands of large-scale, high-efficiency production. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a withstand voltage testing device for semi-finished low-impact automotive-grade capacitors. The specific technical solution is as follows:

[0005] A withstand voltage testing device for low-impact automotive-grade capacitor semi-finished products includes a testing assembly and a horizontally rotatable turntable. The testing assembly includes a top plate above the turntable and a bottom plate below it, both of which can move towards or away from the turntable. A first testing section is located at the bottom of the top plate and can move axially on the top plate. A second testing section is located at the top of the bottom plate and can also move axially on the bottom plate. The first testing section includes one capacitance test probe, one high-voltage generation test probe, and one voltage monitoring test probe. The second testing section includes two capacitance test probes, two high-voltage generation test probes, and two voltage monitoring test probes.

[0006] Preferably, the test assembly further includes a test frame on which a capacitance tester, a high-voltage generator, and a voltage monitor are mounted. The input terminals of capacitance test pin one and capacitance test pin two are connected to the capacitance tester via conductive wires; the input terminals of high-voltage generator test pin one and high-voltage generator test pin two are connected to the high-voltage generator via conductive wires; and the input terminals of voltage monitoring test pin one and voltage monitoring test pin two are connected to the voltage monitor via conductive wires.

[0007] Preferably, a first hydraulic cylinder is installed on the top side of the test frame. The first hydraulic cylinder is used to move the top plate closer to or away from the work turntable, and the output rod of the first hydraulic cylinder is connected to the top plate. A fourth hydraulic cylinder is installed on the bottom side of the test frame. The fourth hydraulic cylinder is used to move the bottom plate closer to or away from the work turntable, and the output shaft of the fourth hydraulic cylinder is connected to the bottom plate.

[0008] Preferably, the capacitance test probe 1, the high voltage generation test probe 1, and the voltage monitoring test probe 1 are all connected together by a T-shaped isolation mounting plate 1. A second hydraulic cylinder is installed at the bottom of the top plate to drive the T-shaped isolation mounting plate 1 to move axially towards the top plate. The output shaft of the second hydraulic cylinder is connected to the T-shaped isolation mounting plate 1.

[0009] Preferably, the capacitance test pin 2, the high voltage generation test pin 2, and the voltage monitoring test pin 2 are all connected together by the T-shaped isolation mounting plate 2. A third hydraulic cylinder is installed on the top of the base plate to drive the T-shaped isolation mounting plate 2 to move axially towards the base plate. The output shaft of the third hydraulic cylinder is connected to the T-shaped isolation mounting plate 2.

[0010] Preferably, it also includes a rotating assembly for driving the worktable to rotate, the rotating assembly including a drive motor, the output shaft of the drive motor being connected to the center of the bottom of the worktable.

[0011] The beneficial effects of this utility model are:

[0012] By incorporating a rotatable turntable and automated testing components, multiple semi-finished capacitors can be rapidly inspected. The turntable's rotation allows for quick switching between different testing stations, eliminating the tedious process of manually moving and adjusting capacitors one by one in traditional testing methods, significantly reducing testing time and improving efficiency. The movement of each test probe, controlled by a specific mounting plate and hydraulic cylinder, ensures precise alignment with the corresponding contact terminals of the capacitor leads, minimizing testing errors caused by poor contact or inaccurate positioning. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the test component in this utility model.

[0015] Reference numerals: 1. Turntable; 2. Drive motor; 3. Test assembly; 30. Test frame; 301. Capacitance tester; 302. High voltage generator; 303. Voltage monitor; 304. Top plate; 305. Bottom plate; 306. Fourth hydraulic cylinder; 307. T-shaped isolation mounting plate one; 308. T-shaped isolation mounting plate two; 31. First hydraulic cylinder; 32. Capacitance test probe one; 33. High voltage generator test probe one; 34. Voltage monitoring test probe one; 35. Second hydraulic cylinder; 36. Capacitance test probe two; 37. High voltage generator test probe two; 38. Voltage monitoring test probe two; 39. Third hydraulic cylinder. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Example

[0018] Please refer to Figures 1-2 The low-impact automotive-grade capacitor semi-finished product withstand voltage testing device of this utility model includes a testing component 3 and a work turntable 1 that can rotate in the horizontal direction. The testing component 3 includes a top plate 304 located above the work turntable 1 and a bottom plate 305 located below the work turntable 1. Both the top plate 304 and the bottom plate 305 can be moved closer to or further away from the work turntable 1.

[0019] The top plate 304 has a first test section at its bottom, which can move axially on the top plate 304; the bottom plate 305 has a second test section at its top, which can move axially on the bottom plate 305.

[0020] The first testing section includes a capacitance test probe 32, a high voltage generation test probe 33, and a voltage monitoring test probe 34; the second testing section includes a capacitance test probe 36, a high voltage generation test probe 37, and a voltage monitoring test probe 38. Furthermore, each of the capacitance test probes 32, 33, 34, 36, 37, and 38 can be connected to an elastic conductive element. This elastic conductive element can undergo elastic deformation when the test probe contacts the capacitor lead, ensuring a good electrical connection and improving the stability and accuracy of the test.

[0021] Furthermore, a buffer and shock-absorbing structure, such as a spring buffer device, can be added at the connection point between the test probe and the elastic conductive component. When vibration or displacement occurs, the buffer structure can absorb energy, reduce the relative displacement between the test probe and the pin, and ensure stable contact.

[0022] Test assembly 3 also includes a test frame 30, on which a capacitance tester 301, a high-voltage generator 302, and a voltage monitor 303 are mounted. The input terminals of capacitance test pin 1 32 and capacitance test pin 2 36 are connected to the capacitance tester 301 via conductive wires. One end of the conductive wire is connected to the input terminal of capacitance test pin 1 32 and capacitance test pin 2 36, and the other end is tightly connected to the corresponding interface of the capacitance tester 301 via a plug to ensure stable signal transmission.

[0023] The input terminals of both high-voltage generator test pin 1 (33) and high-voltage generator test pin 2 (37) are connected to the high-voltage generator 302 via conductive wires. The connection method can combine soldering and plug connection to ensure reliable transmission of the high-voltage signal. The input terminals of both voltage monitoring test pin 1 (34) and voltage monitoring test pin 2 (38) are connected to the voltage monitor 303 via conductive wires, using the same connection method to ensure accurate voltage monitoring.

[0024] Furthermore, inside the test fixture, the high-voltage generator 302, capacitance tester 301, and voltage monitor 303 can be shielded with metal shielding covers to block the propagation path of electromagnetic interference. The metal shielding covers should be properly grounded to ensure the shielding effect.

[0025] For the conductive wires connecting the test probes and various devices, shielded cables can be used, and the shielding layer should be grounded. This can effectively reduce the impact of external electromagnetic interference on signal transmission and improve measurement accuracy.

[0026] A first hydraulic cylinder 31 is mounted on the top side of the test frame 30. The output rod of the first hydraulic cylinder 31 is fixedly connected to the top center of the top plate 304 by bolts. The first hydraulic cylinder 31 is used to move the top plate 304 closer to or further away from the work turntable 1. A fourth hydraulic cylinder 306 is mounted on the bottom side of the test frame 30. The output shaft of the fourth hydraulic cylinder 306 is fixedly connected to the bottom center of the bottom plate 305 by bolts. The fourth hydraulic cylinder 306 is used to move the bottom plate 305 closer to or further away from the work turntable 1. Through the extension and retraction of the first hydraulic cylinder 31 and the fourth hydraulic cylinder 306, the distance between the top plate 304 and the bottom plate 305 and the capacitor on the work turntable 1 can be precisely controlled.

[0027] The capacitance test probe 32, the high voltage generation test probe 33, and the voltage monitoring test probe 34 are all connected together via a T-type isolation mounting plate 307. Mounting holes adapted to each test probe are provided on the T-type isolation mounting plate 307. After inserting each test probe into the mounting hole, nuts are used to tighten the connection, ensuring a secure connection and good insulation performance.

[0028] A second hydraulic cylinder 35 is installed at the bottom of the top plate 304 to drive the T-shaped isolation mounting plate 307 to move axially on the top plate 304. The output shaft of the second hydraulic cylinder 35 is movably connected to the center position of the T-shaped isolation mounting plate 307 through a pin, so that the second hydraulic cylinder 35 can flexibly drive the T-shaped isolation mounting plate 307 to move axially on the top plate 304.

[0029] The second capacity test probe, the second high voltage generation test probe 37, and the second voltage monitoring test probe 38 are all connected together via a second T-shaped isolation mounting plate 308. The connection method is similar to that of the first test section. Mounting holes are made on the second T-shaped isolation mounting plate 308, and the test probes are inserted and tightened with nuts. A third hydraulic cylinder is installed on the top of the base plate 305 to drive the second T-shaped isolation mounting plate 308 to move axially on the base plate 305. The output shaft of the third hydraulic cylinder is movably connected to the center position of the second T-shaped isolation mounting plate 308 via a pin, realizing the axial movement of the second test section on the base plate 305.

[0030] The device also includes a rotating assembly for driving the work turntable 1 to rotate. The rotating assembly includes a drive motor 2. The output shaft of the drive motor 2 is fixedly connected to the bottom center of the work turntable 1 through a coupling, which can stably drive the work turntable 1 to rotate horizontally.

[0031] Furthermore, the worktable 1 is equipped with several clamps for fixing the capacitor. The clamps adopt existing technology, which can place the capacitor in the clamps and fix it. After fixing, one lead of the capacitor is located at the top of the worktable 1, and the other lead of the capacitor is located at the bottom of the worktable 1.

[0032] Furthermore, during testing, multiple contact terminals can be installed at the capacitor pins to facilitate testing.

[0033] In addition, this application is also equipped with a controller, which is connected to various components of this application (such as the first hydraulic cylinder 31, the second hydraulic cylinder 35, the third hydraulic cylinder, the fourth hydraulic cylinder 306, the drive motor 2, the capacitance tester 301, the high voltage generator 302, the voltage monitor 303, etc.) via data cables. The controller can realize the automated control of the entire detection device.

[0034] Install several clamps for fixing capacitors on the work turntable 1, place the capacitor in the clamps, so that one pin of the capacitor is at the top of the work turntable 1 and the other pin is at the bottom of the work turntable 1, and install contact terminals at the pins.

[0035] A capacitance tester 301, a high-voltage generator 302, and a voltage monitor 303 are installed on the test fixture 30. The input terminals of capacitance test pins 32 and 36 are connected to the capacitance tester 301 via conductive wires. First, one end of the conductive wire is soldered to the input terminal of the test pin, and then the other end is plugged into the corresponding interface of the capacitance tester 301, ensuring a tight connection. Similarly, the input terminals of high-voltage generator test pins 33 and 37 are connected to the high-voltage generator 302 via conductive wires, and the input terminals of voltage monitor test pins 34 and 38 are connected to the voltage monitor 303 via conductive wires, using the same soldering and plug connection methods to ensure stable signal transmission.

[0036] During testing, drive motor 2 is started, and the turntable 1 begins to rotate, moving the clamp containing the capacitor below the test assembly 3. First hydraulic cylinder 31 and fourth hydraulic cylinder 306 are then activated. The output rod of first hydraulic cylinder 31 pushes the top plate 304 downwards, while the output shaft of fourth hydraulic cylinder 306 pushes the bottom plate 305 upwards, causing the top plate 304 and bottom plate 305 to gradually approach the capacitor on the turntable 1.

[0037] When the top plate 304 and bottom plate 305 approach the capacitor, the second hydraulic cylinder 35 and the third hydraulic cylinder 39 are activated. The output shaft of the second hydraulic cylinder 35 drives the T-shaped isolation mounting plate 307 to move axially on the top plate 304, so that the capacitance test pin 32, the high voltage generation test pin 33, and the voltage monitoring test pin 34 are accurately aligned with the contact terminals corresponding to the top pins of the capacitor; the output shaft of the third hydraulic cylinder 39 drives the T-shaped isolation mounting plate 308 to move axially on the bottom plate 305, so that the capacitance test pin 36, the high voltage generation test pin 37, and the voltage monitoring test pin 38 are accurately aligned with the contact terminals corresponding to the bottom pins of the capacitor. At this time, the elastic conductive element undergoes elastic deformation when the test pins come into contact with the contact terminals, ensuring a good electrical connection.

[0038] After the test probes are connected to the contact terminals, the high voltage generator 302 applies high voltage to the capacitor through high voltage generating test probe 33 and high voltage generating test probe 37. The voltage monitor 303 monitors the voltage across the capacitor through voltage monitoring test probe 34 and voltage monitoring test probe 38. The capacitance tester 301 tests the capacitance of the capacitor through capacitance test probe 32 and capacitance test probe 36, thereby completing the testing of the capacitor semi-finished product's withstand voltage and capacitance performance.

[0039] After the test is completed, the second hydraulic cylinder 35, the third hydraulic cylinder 39, the first hydraulic cylinder 31, and the fourth hydraulic cylinder 306 are closed sequentially to separate the test probe from the capacitor leads, and the top plate 304 and the bottom plate 305 are moved away from the working turntable 1. Then the drive motor 2 is started again, the working turntable 1 rotates, and the tested capacitor is rotated out of the test area. At the same time, the next capacitor to be tested is rotated to the bottom of the test assembly 3. The above test steps are repeated to achieve continuous testing.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A withstand voltage testing device for low-stray-inductance automotive-grade capacitor semi-finished products, characterized in that, It includes a test assembly (3) and a work turntable (1) that can rotate in the horizontal direction. The test assembly (3) includes a top plate (304) above the work turntable (1) and a bottom plate (305) below the work turntable (1). Both the top plate (304) and the bottom plate (305) can move closer to or further away from the work turntable (1). The bottom of the top plate (304) is provided with a first test section, which can move axially on the top plate (304). The top of the bottom plate (305) is provided with a second test section, which can move axially on the bottom plate (305). The first test section includes a capacitance test needle one (32), a high voltage generation test needle one (33), and a voltage monitoring test needle one (34). The second test section includes a capacitance test needle two (36), a high voltage generation test needle two (37), and a voltage monitoring test needle two (38).

2. The withstand voltage testing device for low-impact automotive-grade capacitor semi-finished products according to claim 1, characterized in that: The test assembly (3) also includes a test frame (30), on which a capacitance tester (301), a high voltage generator (302), and a voltage monitor (303) are mounted. The input terminals of capacitance test pin one (32) and capacitance test pin two (36) are connected to the capacitance tester (301) via conductive wires. The input terminals of high voltage generator test pin one (33) and high voltage generator test pin two (37) are connected to the high voltage generator (302) via conductive wires. The input terminals of voltage monitoring test pin one (34) and voltage monitoring test pin two (38) are connected to the voltage monitor (303) via conductive wires.

3. The withstand voltage testing device for low-impact automotive-grade capacitor semi-finished products according to claim 2, characterized in that: A first hydraulic cylinder (31) is installed on the top side of the test frame (30). The first hydraulic cylinder (31) is used to drive the top plate (304) to move closer to or away from the work turntable (1). The output rod of the first hydraulic cylinder (31) is connected to the top plate (304). A fourth hydraulic cylinder (306) is installed on the bottom side of the test frame (30). The fourth hydraulic cylinder (306) is used to drive the bottom plate (305) to move closer to or away from the work turntable (1). The output shaft of the fourth hydraulic cylinder (306) is connected to the bottom plate (305).

4. The withstand voltage testing device for low-impact automotive-grade capacitor semi-finished products according to claim 3, characterized in that: The capacitance test probe 1 (32), the high voltage generation test probe 1 (33), and the voltage monitoring test probe 1 (34) are all connected together by a T-shaped isolation mounting plate 1 (307). A second hydraulic cylinder (35) is installed at the bottom of the top plate (304) to drive the T-shaped isolation mounting plate 1 (307) to move axially towards the top plate (304). The output shaft of the second hydraulic cylinder (35) is connected to the T-shaped isolation mounting plate 1 (307).

5. The withstand voltage testing device for low-impact automotive-grade capacitor semi-finished products according to claim 4, characterized in that: The capacitance test pin 2 (36), the high voltage generation test pin 2 (37), and the voltage monitoring test pin 2 (38) are all connected together by the T-shaped isolation mounting plate 2 (308). The top of the base plate (305) is equipped with a third hydraulic cylinder (39) for driving the T-shaped isolation mounting plate 2 (308) to move axially towards the base plate (305). The output shaft of the third hydraulic cylinder (39) is connected to the T-shaped isolation mounting plate 2 (308).

6. The withstand voltage testing device for low-stray-inductance automotive-grade capacitor semi-finished products according to claim 1, characterized in that: It also includes a rotating assembly for driving the worktable (1) to rotate, the rotating assembly including a drive motor (2), the output shaft of which is connected to the bottom center of the worktable (1).

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