A power module testing device

Abstract

This invention relates to the field of power module testing technology, specifically to a power module testing device, including a test box. A heating device is fixedly installed at the bottom of the test box, and a placement rack is provided inside the test box and above the heating device. A fixing mechanism for fixing the power module onto the placement rack is also provided. In this invention, a hydraulic cylinder is activated to lower an L-shaped plate. The L-shaped plate sequentially contacts and presses a triangular block from top to bottom, causing the triangular block and connecting rod to slide backward on the perforated plate, compressing a spring. The connecting rod then causes the pressure plate to slide backward, facilitating the fixing and pressing of the connecting wires within the perforated plate onto the inner wall of the perforated plate. A second hydraulic cylinder is activated to move the perforated plate to the left, causing the connecting wires to move synchronously. This facilitates simulated vibration and pulling tests on the connecting wires under high-temperature conditions, improving the comprehensiveness of power module testing under simulated high-temperature environments.

Description

Technical Field

[0001] This invention relates to the field of power module testing technology, and more particularly to a power module testing device. Background Technology

[0002] Power supply modules are power supplies that can be directly mounted on printed circuit boards. Their key feature is the ability to power application-specific integrated circuits (ASICs), digital signal processors (DSPs), microprocessors, memory, field-programmable gate arrays (FPGAs), and other digital or analog loads. Generally, these modules are called point-of-use (POL) power supply systems or point-of-use power supply systems (PUPS). Due to the numerous advantages of their modular structure, modular power supplies are widely used in switching equipment, access equipment, mobile communications, microwave communications, optical transmission, routers, and other communication fields, as well as in automotive electronics, aerospace, and other industries.

[0003] For example, patent application number CN202222991841.6 discloses "a power cord high temperature resistance testing device", which includes a protective structure and a testing mechanism. The protective structure includes a test box and a support member, the support member being fixed to the bottom of the test box; the testing mechanism includes a power supply, a clamping member, and a heating member, the power supply being fixed to the side of the test box.

[0004] However, the above-mentioned device is not convenient for simulating the vibration generated by the power module itself during high-temperature use or during movement, which may cause the connecting wires to be pulled, thus limiting the testing capabilities. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that existing technologies are not convenient for simulating the actual high-temperature use of power modules, the vibration generated during operation or movement, and the resulting pulling of connecting wires, which leads to certain limitations in testing. Therefore, this invention proposes a power module testing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A power module testing device includes a test box, a heating device is fixedly installed at the bottom of the test box, and a placement rack is provided inside the test box and above the heating device.

[0008] It also includes a fixing mechanism for fixing the power module on the placement frame. The fixing mechanism includes a drive motor fixedly installed at the right end of the placement frame. The drive motor is provided with a heat insulation cover. A lifting frame is fixedly installed on the heat insulation cover at the upper end of the drive motor. A hydraulic cylinder is fixedly installed at the upper end of the lifting frame. The hydraulic cylinder is fixedly installed through the upper end of the test box. Limiting plates are fixedly installed symmetrically inside the placement frame, both vertically and horizontally. A locking plate is slidably engaged at the middle of the upper and lower ends of the placement frame.

[0009] It also includes a test mechanism for performing high-temperature pull tests on the connecting wires on the power module. The test mechanism has a wire hole plate on the left side of the placement frame, and a hydraulic cylinder is fixedly installed on the lower right side of the wire hole plate. The right end of the hydraulic cylinder is fixedly installed on the placement frame, and a wire pressure plate is slidably installed in the wire holes of the wire hole plate.

[0010] Preferably, each of the card plates has a rack fixedly installed on its left end, the racks are staggered, the racks are slidably connected to the left side of the placement frame, a gear shaft meshes between the racks, the rear end of the gear shaft is rotatably mounted on the placement frame, and a torsion spring is sleeved on the outer side of the gear shaft.

[0011] Preferably, a second limiting plate is slidably installed on the upper end of the placement rack corresponding to the upper side of the card plate. A screw is rotatably installed on the right end of the second limiting plate, and a vertical plate is threadedly connected to the middle of the screw. The lower end of the vertical plate is fixedly installed on the placement rack.

[0012] Preferably, clamping plates are slidably installed on both the front and rear ends of the upper clamping plate, and a spring is fixedly installed between the clamping plates. A connecting plate is fixedly installed on the end of the clamping plates that are close to each other. A fixing block is fixedly installed on the upper end of the upper clamping plate corresponding to the connecting plate, and the fixing block abuts and fits against the connecting plate.

[0013] Preferably, the upper plate has elastic pressure strips symmetrically slidably installed in the front and back, and a trapezoidal block is fixedly installed on the upper end of the elastic pressure strip. The front and back ends of the trapezoidal block abut against and fit against the clamps on the front and back sides, respectively.

[0014] Preferably, a second spring is fixedly installed at the lower middle part of the trapezoidal block, and the lower end of the second spring is fixedly installed inside the upper plate.

[0015] Preferably, each of the pressure plates has a connecting rod fixedly installed at its front end, the front end of the connecting rod is slidably installed through the wire hole plate, a triangular block is fixedly installed at the front end of each connecting rod, and a spring is sleeved on the outer side of each connecting rod.

[0016] Preferably, an L-shaped plate is provided on the upper front side of the perforated plate corresponding to the triangular block, and a hydraulic cylinder three is fixedly installed on the upper end of the L-shaped plate. The hydraulic cylinder three is fixedly connected to the upper end of the perforated plate through a connecting frame.

[0017] Preferably, each wire hole in the wire hole plate is slidably installed with an inclined block, and a through groove is opened inside the wire hole plate corresponding to the inclined block. The inclined blocks are staggered, and a spring is fixedly installed inside the through groove corresponding to the inclined block.

[0018] Preferably, a top block is fixedly installed on each of the inclined blocks at the rear end of the pressure plate, and a release bracket is slidably installed on the right end of the wire hole plate corresponding to the power module connection wire.

[0019] The power module components are made of the following materials:

[0020] PCB substrate: The PCB substrate material is Arlon 85N, which is a polyimide laminate and prepreg. Arlon 85N material can operate at a maximum temperature of 250°C for extended periods and has excellent thermal stability, extremely low expansion rate and excellent magnetic field performance.

[0021] Conductors and shielded conductors: The shielded conductors use AFR-250 conductors (silver-plated copper core PFA insulated silver-plated shielded installation wire), with an operating temperature of -60℃ to 250℃ and an instantaneous temperature of up to 300℃. They have high temperature resistance, low impedance, good electrical characteristics, and good shielding performance.

[0022] Solder paste and solder wire: made of Ag3.0 / Cu0.5, melting point 290℃, with high temperature resistance and electrical conductivity.

[0023] Needle sleeve and copper column: The needle sleeve and copper column are made of copper with a melting point of 1083℃, which can meet the requirements of working in an ultra-high temperature environment of 200℃.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. In this invention, the sealing door at the front of the test chamber is opened, and the upper clamping plate is pulled upward, causing the rack fixedly connected to it to rise synchronously, driving the gear shaft to rotate, compressing the torsion spring, and the gear shaft to drive the rack on the other side and the lower clamping plate to descend, clamping the power module to be tested onto the front side of the placement rack, so that the rear end of the power module abuts and fits against the limiting plate. The upper clamping plate is released, and under the action of the torsion spring, the clamping plates and rack on both sides are reset, and the power module is limited and clamped on the placement rack. The disassembly and assembly of the power module is simple and convenient, which helps to improve the testing efficiency of the power module.

[0026] 2. In this invention, rotating the screw drives the second limiting plate to slide on the upper side of the placement frame, so that the second limiting plate gradually slides and abuts against the upper surface of the upper side of the placement frame. The second limiting plate is designed to limit the placement of the placement frame and prevent the power module from pressing against the placement frame under the action of gravity when the placement frame rotates, causing the torsion spring to loosen, resulting in the placement of the placement frames on both sides being unstable and the power module falling off the placement frame.

[0027] 3. In this invention, the screw continues to rotate, causing the second limiting plate to continue sliding to the left on the upper surface of the upper clamping plate. The inclined surface on the inner side of the second limiting plate will press the clamping plates on both sides, causing them to slide closer to each other on the upper clamping plate, compressing the first spring. The clamping plates on both sides facilitate clamping and abutting the power module against the first limiting plate, avoiding gaps between the front and rear sides of the power module and the clamping plate and the first limiting plate, which would cause the power module to wobble and become unstable during subsequent pull tests or rotations. This improves the stability of the power module and also ensures the effectiveness of subsequent pull tests.

[0028] 4. In this invention, when the clamps on both sides move closer to each other, they will also squeeze the trapezoidal block. The trapezoidal block drives the elastic pressure strip to slide downward inside the clamping plate, compressing the second spring. The elastic pressure strip extends out from inside the clamping plate and abuts against the upper end of the power module. The elastic pressure strip adapts to bending deformation, which makes it easy to firmly press the power module against the placement frame, so that the power module cannot slide up, down, left, or right, ensuring the quality of subsequent testing. It is also suitable for fixing power modules of different sizes.

[0029] 5. In this invention, after the power module is fixed, the connecting wires on the power module are passed through the wire holes in the wire hole plate in sequence. This avoids the connecting wires on the power module from getting tangled and messy when the mounting frame drives the power module to rotate, which would delay the time spent on wire management and affect the testing efficiency.

[0030] 6. In this invention, the drive motor is started to rotate the placement rack to a horizontal position. The hydraulic cylinder is started to lower the lifting frame, drive motor, placement rack and power module fixed thereto, so that the power module is in contact with the heating device on the lower side. The heating device is started to conduct a high-temperature test on the power module by heating the power module. After the test is completed, the hydraulic cylinder is started to raise the lifting frame, drive motor and placement rack. The drive motor drives the placement rack to rotate, which facilitates the flipping test of the power module.

[0031] 7. In this invention, the third hydraulic cylinder drives the L-shaped plate to descend. The L-shaped plate contacts and presses the triangular block from top to bottom, causing the triangular block and connecting rod to slide backward on the wire hole plate, compressing the third spring. The connecting rod drives the pressure plate to slide backward, which facilitates fixing and pressing the connecting wire inside the wire hole of the wire hole plate onto the inner wall of the wire hole plate. The second hydraulic cylinder drives the wire hole plate to move to the left. The wire hole plate will drive the connecting wire to move synchronously, which facilitates the simulated vibration and pulling test of the connecting wire in a high-temperature environment, improving the comprehensiveness of the power module test under simulated high-temperature environment.

[0032] 8. In this invention, when the L-shaped plate descends and presses the upper triangular block, it facilitates high-temperature pull tests on the connecting wires on the upper side of the wire hole plate. When the L-shaped plate continues to descend and presses the upper and middle triangular blocks, it facilitates simultaneous high-temperature pull tests on the connecting wires on the upper and middle sides of the wire hole plate. Similarly, when the L-shaped plate presses all three triangular blocks, it facilitates simultaneous high-temperature pull tests on multiple sets of connecting wires. The test results are more comprehensive, avoiding the situation where only a single or multiple connecting wires can be tested individually. Moreover, it eliminates the need for manual untying and re-fixing of the connecting wires after each individual test for a new round of testing, resulting in high testing efficiency.

[0033] 9. In this invention, when the pressure plate moves backward, it also drives the top block to move backward synchronously. The top block squeezes the inclined block, causing the inclined block to slide relative to each other in the through groove. When the spring is compressed, the top block will gradually retract into the through groove until the pressure plate squeezes and fixes the connecting wire in the wire hole. At this time, the inclined blocks on both sides move relative to each other to a semi-overlapping state. At this time, the connecting wire is pushed and compressed into an S-shape by the inclined blocks on both sides, which improves the fixing effect of the pressure plate on the connecting wire and avoids the connecting wire slipping off the pressure plate during the pull test, thus improving the pull test effect.

[0034] 10. In this invention, after all tests are completed, all mechanical parts are reset and the release frame is pushed back and forth. The release frame pushes all the connecting wires that are attached to the inner wall of the pressure plate or wire hole plate to detach. This avoids the situation where the surface of the connecting wires melts and sticks to the inner wall of the pressure plate or wire hole plate after high temperature testing, and peels them off one by one, which wastes time and affects the efficiency of subsequent tests. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the overall front cross-sectional three-dimensional structure of the present invention;

[0037] Figure 3 For the present invention Figure 2 A schematic diagram of the three-dimensional structure on the right side;

[0038] Figure 4 For the present invention Figure 2 A partial cross-sectional three-dimensional structural schematic diagram;

[0039] Figure 5 For the present invention Figure 2 Enlarged structural diagram of the centrally placed shelf;

[0040] Figure 6 For the present invention Figure 4 Enlarged structural diagram of the centrally placed rack and wire hole plate;

[0041] Figure 7 For the present invention Figure 6 Enlarged structural schematic diagram of the centerline orifice plate and hydraulic cylinder 2;

[0042] Figure 8 For the present invention Figure 6 Enlarged structural diagram of the connection between the middle limiting plate, the clamping plate, and the clip plate;

[0043] Figure 9 For the present invention Figure 5 Schematic diagram of the structure at point A;

[0044] Figure 10 For the present invention Figure 5 Schematic diagram of the structure at point B;

[0045] Figure 11 For the present invention Figure 7 Schematic diagram of the structure at point C;

[0046] In the diagram: 1. Test chamber; 2. Heating device; 3. Placement rack;

[0047] Fixed mechanism: 4. Drive motor; 5. Lifting frame; 6. Hydraulic cylinder one; 7. Limiting plate one; 8. Clamping plate; 9. Rack; 10. Gear shaft; 11. Torsion spring; 12. Limiting plate two; 13. Screw; 14. Vertical plate; 15. Clamping plate; 16. Spring one; 17. Connecting plate; 18. Fixing block; 19. Elastic pressure strip; 20. Spring two; 21. Trapezoidal block;

[0048] Testing components: 22. Hole plate; 23. Hydraulic cylinder II; 24. Pressure plate; 25. Connecting rod; 26. Triangular block; 27. Spring III; 28. L-shaped plate; 29. ​​Hydraulic cylinder III; 30. Inclined block; 31. Spring IV; 32. Top block; 33. Release frame. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0050] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] Reference Figures 1-11A power module testing device includes a test chamber 1. A heating device 2 is fixedly installed at the bottom of the test chamber 1. A placement rack 3 is located inside the test chamber 1 and above the heating device 2. A fixing mechanism for fixing the power module onto the placement rack 3 is also provided. The fixing mechanism includes a drive motor 4 fixedly installed at the right end of the placement rack 3. A heat insulation cover is provided outside the drive motor 4. A lifting frame 5 is fixedly installed on the heat insulation cover at the upper end of the drive motor 4. A hydraulic cylinder 6 is fixedly installed at the upper end of the lifting frame 5. The hydraulic cylinder 6 is fixedly installed through the upper end of the test chamber 1. Activating the drive motor 4 rotates the placement rack 3 to a horizontal position. Activating the hydraulic cylinder 6 lowers the lifting frame 5, the drive motor 4, the placement rack 3, and the power module fixed thereto, causing the power module to... The power module is attached to the lower heating device 2. Activating the heating device 2 heats the power module to perform a high-temperature test. After the test, hydraulic cylinder 6 drives the lifting frame 5, drive motor 4, and placement frame 3 to rise. Drive motor 4 drives the placement frame 3 to rotate, facilitating a flipping test of the power module. Limiting plates 7 are symmetrically fixedly installed inside the placement frame 3, both vertically and horizontally. A locking plate 8 is slidably engaged at the middle of both ends of the placement frame 3. A rack 9 is fixedly installed on the left end of each locking plate 8, with the racks 9 staggered. The racks 9 are slidably connected to the left side of the placement frame 3, and a gear shaft 10 meshes between the racks 9. The rear end of the gear shaft 10 is rotatably mounted on the placement frame 3, and a torsion spring 11 is sleeved on the outer side of the gear shaft 10. A limiting plate 12 is slidably installed on the upper end of the placement rack 3, corresponding to the upper clamping plate 8. A screw 13 is rotatably installed on the right end of the limiting plate 12. A vertical plate 14 is threadedly connected to the middle of the screw 13. The lower end of the vertical plate 14 is fixedly installed on the placement rack 3. Clamping plates 15 are slidably installed on both the front and rear ends of the upper clamping plate 8. A spring 16 is fixedly installed between the clamping plates 15. Open the sealing door at the front of the test chamber 1, pull the upper clamping plate 8 upward, and drive the rack 9 fixedly connected to it to rise synchronously, driving the gear shaft 10 to rotate, compressing the torsion spring 11. The gear shaft 10 drives the rack 9 on the other side and the lower clamping plate 8 to descend, clamping the power module to be tested onto the front of the placement rack 3, so that the rear end of the power module abuts against and fits against the limiting plate 7. Release the upper clamping plate. Plate 8, under the action of torsion spring 11, drives the upper and lower clamping plates 8 and rack 9 to reset, limiting and clamping the power module onto the placement frame 3. The disassembly and assembly of the power module is simple and convenient, which helps to improve the testing efficiency of the power module. Rotating screw 13 drives the second limiting plate 12 to slide on the placement frame 3 towards the upper clamping plate 8, so that the second limiting plate 12 gradually slides and abuts against the upper end surface of the upper clamping plate 8. The second limiting plate 12 is set to limit the clamping plate 8, preventing the power module from pressing against the clamping plate 8 under the action of gravity when the placement frame 3 rotates, causing the torsion spring 11 to loosen, resulting in the clamping plates 8 on both sides being unstable and the power module falling off the placement frame 3. Continue to rotate screw 13 to make the second limiting plate 12 continue to slide to the left on the upper end surface of the upper clamping plate 8.The inclined surface on the inner side of the limiting plate 12 will press the clamping plates 15 on both sides, causing them to slide closer to each other on the upper clamping plate 8, compressing the spring 16. The clamping plates 15 on both sides facilitate clamping and abutting the power module against the limiting plate 7, avoiding gaps between the front and rear sides of the power module and the clamping plate 8 and the limiting plate 7, which would cause the power module to wobble and become unstable during subsequent pull tests or rotations. This improves the stability of the power module and also ensures the effectiveness of subsequent pull tests. Connecting plates 17 are fixedly installed at the ends of the clamping plates 15 that are close to each other. Fixing blocks 18 are fixedly installed on the upper end of the upper clamping plate 8 corresponding to the connecting plates 17. The fixing blocks 18 abut against the connecting plates 17. Elastic pressure strips 19 are symmetrically slidably installed on the front and back sides of the upper clamping plate 8. A trapezoidal block 21 is fixedly installed at the upper end of the 19. The front and rear ends of the trapezoidal block 21 abut against and fit against the clamping plates 15 on the front and rear sides, respectively. A second spring 20 is fixedly installed at the middle of the lower end of the trapezoidal block 21. The lower end of the second spring 20 is fixedly installed inside the upper clamping plate 8. When the clamping plates 15 on both sides move closer together, they also compress the trapezoidal block 21. The trapezoidal block 21 causes the elastic pressure strip 19 to slide downwards inside the clamping plate 8, compressing the second spring 20. The elastic pressure strip 19 extends out from inside the clamping plate 8 and abuts against the upper end of the power module. The adaptive bending deformation of the elastic pressure strip 19 facilitates the firm abutment and pressing of the power module onto the placement frame 3, preventing the power module from sliding up, down, left, or right, ensuring the quality of subsequent testing. It is also suitable for fixing power modules of different sizes.

[0052] During operation, open the sealed door at the front of the test chamber 1, pull up the upper clamping plate 8, causing the rack 9 fixedly connected to it to rise synchronously, driving the gear shaft 10 to rotate, compressing the torsion spring 11. The gear shaft 10 then drives the rack 9 on the other side and the lower clamping plate 8 to descend, clamping the power module to be tested onto the front of the placement rack 3, so that the rear end of the power module abuts against and fits against the limiting plate 7. Release the upper clamping plate 8, and under the action of the torsion spring 11, drive the upper and lower clamping plates 8 and rack 9 to reset, limiting and clamping the power module onto the placement rack 3. The power module is easy to install and remove, which improves the testing efficiency. Rotating screw 13 causes the second limiting plate 12 to slide on the upper side of the mounting bracket 3, gradually sliding and abutting against the upper surface of the upper mounting bracket 8. The limiting plate 12 effectively limits the mounting bracket 8, preventing the power module from pressing against the mounting bracket 8 under gravity when the mounting bracket 3 rotates, causing the torsion spring 11 to loosen and resulting in unstable clamping of the mounting brackets 8 on both sides, and the power module falling off the mounting bracket 3. Continuing to rotate screw 13... Limiting plate 2 12 continues to slide to the left on the upper end of the upper clamping plate 8. The inclined surface on the inner side of limiting plate 2 12 will press the clamping plates 15 on both sides, causing them to slide closer to each other on the upper clamping plate 8, compressing spring 16. The clamping plates 15 on both sides facilitate clamping and abutting the power module against limiting plate 1 7, avoiding gaps between the front and rear sides of the power module and the clamping plate 8 and limiting plate 1 7, which would cause the power module to wobble and become unstable during subsequent pulling or rotating tests. This improves the stability of the power module and also ensures the stability of subsequent pulling tests. The effect of the pull test is that when the clamping plates 15 on both sides move closer to each other, they will also squeeze the trapezoidal block 21. The trapezoidal block 21 drives the elastic pressure strip 19 to slide downward inside the clamping plate 8, compressing the spring 20. The elastic pressure strip 19 extends out from inside the clamping plate 8 and abuts against the upper end of the power module. The elastic pressure strip 19 adapts to bending deformation, which makes it easy to firmly press the power module against the placement frame 3, so that the power module cannot slide up, down, left, or right, ensuring the quality of subsequent tests. It is also suitable for fixing power modules of different sizes.

[0053] As an embodiment of the present invention, a testing mechanism for performing high-temperature pull tests on the connecting wires on the power module is also provided. The testing mechanism's placement frame 3 has a wire hole plate 22 on its left side. After fixing, the connecting wires on the power module are sequentially passed through the wire holes of the wire hole plate 22. This avoids the connecting wires on the power module becoming tangled and messy when the placement frame 3 rotates the power module, thus saving time and affecting testing efficiency. A hydraulic cylinder 23 is fixedly installed on the lower right side of the wire hole plate 22. The right end of the hydraulic cylinder 23 is fixedly installed on the placement frame 3. A pressure plate 24 is slidably installed in each wire hole of the wire hole plate 22. A connecting rod 25 is fixedly installed at the front end of each pressure plate 24. The front end of the connecting rod 25 is slidably installed through the wire hole plate 22. Triangular blocks 26 are fixedly installed at the front end of each rod 25, and springs 27 are sleeved on the outer side of each connecting rod 25. An L-shaped plate 28 is provided on the upper front side of the wire hole plate 22 corresponding to the triangular blocks 26. A hydraulic cylinder 29 is fixedly installed on the upper end of the L-shaped plate 28. The hydraulic cylinder 29 is fixedly connected to the upper end of the wire hole plate 22 through a connecting frame. When the hydraulic cylinder 29 is activated, the L-shaped plate 28 is driven to descend. The L-shaped plate 28 contacts and presses the triangular blocks 26 from top to bottom, causing the triangular blocks 26 and connecting rods 25 to slide backward on the wire hole plate 22, compressing the springs 27. The connecting rods 25 drive the wire pressing plate 24 to slide backward, which facilitates fixing and pressing the connecting wire in the wire hole of the wire hole plate 22 onto the inner wall of the wire hole plate 22. When the hydraulic cylinder 23 is activated, the wire hole plate 22 moves to the left. The perforated plate 22 drives the connecting wires to move synchronously, facilitating simulated vibration-induced pull tests on the connecting wires under high-temperature conditions. This improves the comprehensiveness of power module testing under simulated high-temperature environments. When the L-shaped plate 28 descends and presses the upper triangular block 26, it facilitates high-temperature pull tests on the connecting wires on the upper side of the perforated plate 22. When the L-shaped plate 28 continues to descend and presses the upper and middle triangular blocks 26, it facilitates simultaneous high-temperature pull tests on the connecting wires on the upper and middle sides of the perforated plate 22. Similarly, when the L-shaped plate 28 presses all three triangular blocks 26, it facilitates simultaneous high-temperature pull tests on multiple sets of connecting wires, resulting in a more comprehensive testing effect and avoiding the limitation of only being able to test a single or multiple connecting wires individually. Furthermore, it eliminates the need for manual testing, re-untying, and re-fixing of the connecting wires for a new round of testing, resulting in high testing efficiency. Each wire hole in the wire hole plate 22 has a slidingly mounted inclined block 30. A through groove is formed inside the wire hole plate 22 corresponding to the inclined block 30, with the inclined blocks 30 being staggered. A spring 31 is fixedly mounted inside the through groove corresponding to the inclined block 30. A top block 32 is fixedly mounted on the rear end of the pressure plate 24 corresponding to each inclined block 30. A release bracket 33 is slidably mounted on the right end of the wire hole plate 22 corresponding to the power module connection wire. When the pressure plate 24 moves backward, it also drives the top block 32 to move backward synchronously. The top block 32 presses against the inclined block 30, causing the inclined block 30 to slide relative to the inclined block 30 within the through groove, compressing the spring 31. The top block 32 then gradually retracts into the through groove.Until the pressure plate 24 presses and fixes the connecting wire inside the wire hole, the inclined blocks 30 on both sides move to a semi-overlapping state. At this time, the connecting wire is pushed and compressed into an S-shape by the inclined blocks 30 on both sides, which improves the fixing effect of the pressure plate 24 on the connecting wire and avoids the connecting wire slipping off the pressure plate 24 during the pull test, thus improving the pull test effect. After all tests are completed, all mechanisms are reset, and the release frame 33 is pushed back and forth. The release frame 33 pushes and detaches all the connecting wires adhering to the inner wall of the pressure plate 24 or the wire hole plate 22, avoiding the situation where the surface of the connecting wire melts and sticks to the inner wall of the pressure plate 24 or the wire hole plate 22 after the high temperature test, and peels them off one by one, wasting time and affecting the efficiency of subsequent tests.

[0054] During operation, after fixing, the connecting wires on the power module are sequentially passed through the wire holes in the wire hole plate 22. This prevents the connecting wires on the power module from becoming tangled and messy when the placement frame 3 rotates, which would waste time and affect testing efficiency. The drive motor 4 is started to rotate the placement frame 3 to a horizontal position. The hydraulic cylinder 6 is then started to lower the lifting frame 5, drive motor 4, placement frame 3, and the power module fixed to it, so that the power module is in contact with the heating device 2 below. The heating device 2 is then started to conduct a high-temperature test on the power module by heating it. After the test is completed, the hydraulic cylinder 6 raises the lifting frame 5, drive motor 4, and placement frame 3, and the drive motor 4 rotates the placement frame 3 to facilitate flipping the power module for testing. Hydraulic cylinder 29 is activated, causing the L-shaped plate 28 to descend. The L-shaped plate 28 contacts and presses the triangular block 26 from top to bottom, causing the triangular block 26 and connecting rod 25 to slide backward on the wire hole plate 22, compressing spring 27. The connecting rod 25 then causes the wire pressing plate 24 to slide backward, facilitating the fixing and pressing of the connecting wire inside the wire hole of the wire hole plate 22 onto the inner wall of the wire hole plate 22. Hydraulic cylinder 23 is activated, causing the wire hole plate 22 to move to the left. The wire hole plate 22 will move the connecting wire synchronously, facilitating the simulated vibration and tension test of the connecting wire in a high-temperature environment, thus improving the comprehensiveness of the power module test under simulated high-temperature environment. When the L-shaped plate 28 descends and presses the upper triangular block 26, it facilitates the high-temperature testing of the connecting wire on the upper side of the wire hole plate 22. In the pull test, when the L-shaped plate 28 continues to descend and squeezes the upper and middle triangular blocks 26, it facilitates simultaneous high-temperature pull tests on the connecting wires on the upper and middle sides of the wire hole plate 22. Similarly, when the L-shaped plate 28 squeezes all three triangular blocks 26, it facilitates simultaneous high-temperature pull tests on multiple sets of connecting wires, resulting in a more comprehensive test effect. This avoids the situation where only a single or multiple connecting wires can be tested individually, and it eliminates the need for manual untying and re-fixing of connecting wires after each individual test for a new round of testing, thus improving testing efficiency. When the pressure plate 24 moves backward, it also drives the top block 32 to move backward synchronously. The top block 32 squeezes the inclined block 30, causing the inclined block 30 to slide relative to each other within the through groove, compressing the spring 4 31 and the top block 32. It will gradually shrink into the through groove until the pressure plate 24 squeezes and fixes the connecting wire into the wire hole. At this time, the inclined blocks 30 on both sides move to a semi-overlapping state. The connecting wire is pushed and compressed into an S-shape by the inclined blocks 30 on both sides, which improves the fixing effect of the pressure plate 24 on the connecting wire and avoids the connecting wire from slipping off the pressure plate 24 during the pull test. After all the tests are completed, all the machinery is reset and the release frame 33 is pushed back and forth. The release frame 33 pushes and removes all the connecting wires that are attached to the pressure plate 24 or the inner wall of the wire hole plate 22. This avoids the situation where the surface of the connecting wire melts and sticks to the inner wall of the pressure plate 24 or the wire hole plate 22 after the high temperature test, and the time is wasted by peeling them off one by one, which affects the efficiency of subsequent tests.

[0055] The power module components are made of the following materials:

[0056] PCB substrate: The PCB substrate material is Arlon 85N, which is a polyimide laminate and prepreg. Arlon 85N material can operate at a maximum temperature of 250°C for extended periods and has excellent thermal stability, extremely low expansion rate and excellent magnetic field performance.

[0057] Conductors and shielded conductors: The shielded conductors use AFR-250 conductors (silver-plated copper core PFA insulated silver-plated shielded installation wire), with an operating temperature of -60℃ to 250℃ and an instantaneous temperature of up to 300℃. They have high temperature resistance, low impedance, good electrical characteristics, and good shielding performance.

[0058] Solder paste and solder wire: made of Ag3.0 / Cu0.5, melting point 290℃, with high temperature resistance and electrical conductivity.

[0059] Needle sleeve and copper column: The needle sleeve and copper column are made of copper with a melting point of 1083℃, which can meet the requirements of working in an ultra-high temperature environment of 200℃.

[0060] Working principle:

[0061] In use, the sealed door at the front of the test chamber 1 is opened, and the upper clamping plate 8 is pulled upward, causing the rack 9 fixedly connected to it to rise synchronously, driving the gear shaft 10 to rotate, compressing the torsion spring 11. The gear shaft 10 then drives the rack 9 on the other side and the lower clamping plate 8 to descend, clamping the power module to be tested onto the front of the placement rack 3, so that the rear end of the power module abuts against and fits against the limiting plate 7. The upper clamping plate 8 is released, and under the action of the torsion spring 11, the clamping plates 8 and rack 9 on both sides are reset, limiting and clamping the power module onto the placement rack 3. The disassembly and assembly of the power module is simple and convenient, which helps to improve the testing efficiency of the power module. Rotating the screw 13 causes the limiting plate 12 to slide on the placement rack 3 onto the upper clamping plate 8, so that the limiting plate 12... 12 gradually slides and abuts against the upper surface of the upper plate 8. The second limiting plate 12 is set to limit the plate 8, preventing the power module from pressing against the plate 8 under the action of gravity when the placement rack 3 rotates, causing the torsion spring 11 to loosen, resulting in unstable clamping of the two plates 8 and the power module falling off the placement rack 3. Continue to rotate the screw 13 to make the second limiting plate 12 continue to slide to the left on the upper surface of the upper plate 8. The inclined surface on the inner side of the second limiting plate 12 will squeeze the clamping plates 15 on both sides, causing them to slide closer to each other on the upper plate 8, compressing the first spring 16. The clamping plates 15 on both sides are set to clamp and abut against the first limiting plate 7, avoiding gaps between the front and rear sides of the power module and the plate 8 and the first limiting plate 7, which would cause... To prevent instability during subsequent pull or rotation tests of the power module, this design improves the stability of the power module's fixation and ensures the effectiveness of subsequent pull tests. When the clamping plates 15 on both sides move closer together, they also compress the trapezoidal block 21. The trapezoidal block 21 causes the elastic pressure strip 19 to slide downwards inside the clamping plate 8, compressing the spring 20. The elastic pressure strip 19 extends out from inside the clamping plate 8 and abuts against the upper end of the power module. The adaptive bending deformation of the elastic pressure strip 19 facilitates a firm press against the power module on the placement bracket 3, preventing the power module from sliding up, down, left, or right, thus ensuring the quality of subsequent tests. It is also suitable for fixing power modules of different sizes. After fixing, the connecting wires on the power module are connected according to... The wires pass through the holes in the wire hole plate 22 to prevent the connecting wires on the power module from becoming tangled and messy when the placement frame 3 rotates, thus saving time and affecting testing efficiency. The drive motor 4 is started to rotate the placement frame 3 to a horizontal position. Hydraulic cylinder 6 is then activated to lower the lifting frame 5, drive motor 4, placement frame 3, and the power module fixed to it, bringing the power module into contact with the heating device 2 below. The heating device 2 is then activated to perform high-temperature testing on the power module. After the test, hydraulic cylinder 6 raises the lifting frame 5, drive motor 4, and placement frame 3, while drive motor 4 rotates the placement frame 3 to facilitate flipping the power module for testing. Hydraulic cylinder 29 is then activated to lower the L-shaped plate 28.L-shaped plate 28 contacts and presses triangular block 26 from top to bottom, causing triangular block 26 and connecting rod 25 to slide backward on wire hole plate 22, compressing spring 27. Connecting rod 25 drives wire pressing plate 24 to slide backward, facilitating the fixing and pressing of the connecting wire inside the wire hole of wire hole plate 22 onto the inner wall of wire hole plate 22. Hydraulic cylinder 23 is activated, causing wire hole plate 22 to move to the left. Wire hole plate 22 will drive the connecting wire to move synchronously, facilitating simulated vibration and tension testing of the connecting wire in high-temperature environments, thus improving the simulation of power supply simulation under high-temperature environments. The comprehensiveness of the block test is achieved by using the L-shaped plate 28 to compress the upper triangular block 26, facilitating high-temperature pull tests on the connecting wires on the upper side of the wire hole plate 22. As the L-shaped plate 28 continues to descend and compress the upper and middle triangular blocks 26, it facilitates simultaneous high-temperature pull tests on the connecting wires on the upper and middle sides of the wire hole plate 22. Similarly, when the L-shaped plate 28 compresses all three triangular blocks 26, it facilitates simultaneous high-temperature pull tests on multiple sets of connecting wires. This comprehensive testing method avoids the limitation of only being able to test a single or multiple connecting wires individually. In the case of independent testing, and without the need for manual re-untying and re-fixing of the connecting wires after each test, the testing efficiency is high. When the pressure plate 24 moves backward, it also drives the top block 32 to move backward synchronously. The top block 32 presses against the inclined block 30, causing the inclined block 30 to slide relative to each other in the through groove. Compression of the spring 4 31 causes the top block 32 to gradually retract in the through groove until the pressure plate 24 presses and fixes the connecting wire in the wire hole. At this time, the inclined blocks 30 on both sides move to a semi-overlapping state, and the connecting wire is pushed and pressed by the inclined blocks 30 on both sides. The S-shape design improves the fixing effect of the pressure plate 24 on the connecting wires, preventing the connecting wires from slipping off the pressure plate 24 during pull tests, thus improving the pull test effect. After all tests are completed, all mechanisms are reset, and the release frame 33 is pushed back and forth. The release frame 33 pushes all the connecting wires adhering to the pressure plate 24 or the inner wall of the wire hole plate 22 to detach them, avoiding the situation where the surface of the connecting wires melts and sticks to the inner wall of the pressure plate 24 or the wire hole plate 22 after high-temperature testing, resulting in wasted time and affecting the efficiency of subsequent tests.

[0062] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A power module testing device, comprising a test box (1), characterized in that, A heating device (2) is fixedly installed at the bottom of the test box (1), and a placement rack (3) is provided inside the test box (1) and above the heating device (2). It is also provided with a fixing mechanism for fixing the power module on the placement frame (3). The fixing mechanism includes a drive motor (4) fixedly installed at the right end of the placement frame (3). The drive motor (4) is provided with a heat insulation cover. A lifting frame (5) is fixedly installed on the heat insulation cover at the upper end of the drive motor (4). A hydraulic cylinder (6) is fixedly installed at the upper end of the lifting frame (5). The hydraulic cylinder (6) is fixedly installed through the upper end of the test box (1). Limiting plates (7) are fixedly installed symmetrically inside the placement frame (3) in the upper and lower and left and right directions. A card plate (8) is slidably attached to the middle of the upper and lower ends of the placement frame (3). A test mechanism is also provided for high-temperature pulling test of the connecting wires on the power module. The test mechanism includes a wire hole plate (22) set on the left side of the placement frame (3). A hydraulic cylinder two (23) is fixedly installed on the lower right side of the wire hole plate (22). The right end of the hydraulic cylinder two (23) is fixedly installed on the placement frame (3). A pressure plate (24) is slidably installed in the wire hole of the wire hole plate (22). A connecting rod (25) is fixedly installed at the front end of the pressure plate (24). The front end of the connecting rod (25) is slidably installed on the wire hole plate (22). A triangular block (26) is fixedly installed at the front end of the connecting rod (25). A spring three (27) is sleeved on the outside of the connecting rod (25). An L-shaped plate (28) is provided on the upper front side of the wire hole plate (22) corresponding to the triangular block (26). A hydraulic cylinder three (29) is fixedly installed on the upper end of the L-shaped plate (28). The hydraulic cylinder three (29) is fixedly connected to the upper end of the wire hole plate (22) through a connecting frame.

2. The power module testing device according to claim 1, characterized in that, Each of the card plates (8) is fixedly installed with a rack (9) on its left end. The racks (9) are staggered and are slidably connected to the left side of the placement frame (3). A gear shaft (10) meshes between the racks (9). The rear end of the gear shaft (10) is rotatably mounted on the placement frame (3). A torsion spring (11) is sleeved on the outside of the gear shaft (10).

3. The power module testing device according to claim 1, characterized in that, The upper end of the placement rack (3) is slidably installed with a limiting plate (12) corresponding to the upper side of the card plate (8). A screw (13) is rotatably installed on the right end of the limiting plate (12). A vertical plate (14) is threadedly connected to the middle of the screw (13). The lower end of the vertical plate (14) is fixedly installed on the placement rack (3).

4. The power module testing device according to claim 1, characterized in that, The upper plate (8) has a clamping plate (15) slidably installed on both the front and rear ends. A spring (16) is fixedly installed between the clamping plates (15). A connecting plate (17) is fixedly installed on the end of the clamping plates (15) that are close to each other. A fixing block (18) is fixedly installed on the upper end of the upper plate (8) corresponding to the connecting plate (17). The fixing block (18) and the connecting plate (17) abut against each other.

5. A power module testing device according to claim 1, characterized in that, The upper plate (8) has elastic pressure strips (19) slidably installed in the front and back. A trapezoidal block (21) is fixedly installed on the upper end of the elastic pressure strip (19). The front and back ends of the trapezoidal block (21) abut against and fit against the clamps (15) on the front and back sides respectively.

6. The power module testing device according to claim 5, characterized in that, A second spring (20) is fixedly installed at the lower middle part of the trapezoidal block (21), and the lower end of the second spring (20) is fixedly installed inside the upper plate (8).

7. A power module testing device according to claim 1, characterized in that, An inclined block (30) is slidably installed in the wire hole of the wire hole plate (22). A through groove is opened inside the wire hole plate (22) corresponding to the inclined block (30). The inclined block (30) is staggered. A spring four (31) is fixedly installed inside the through groove corresponding to the inclined block (30).

8. A power module testing device according to claim 1, characterized in that, The pressure plate (24) is fixedly equipped with a top block (32) on the corresponding inclined block (30) at the rear end, and a release bracket (33) is slidably installed on the right end of the wire hole plate (22) corresponding to the power module connection wire.

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