IGBT (Insulated Gate Bipolar Translator) test equipment

Abstract

The utility model discloses an IGBT test device, which comprises a rotary feeding table, a terminal connecting module, a cooling box, a feeding station and a test station, the terminal connecting module is adjacent to the test station, the rotary feeding table is provided with two jigs which are symmetrically arranged relative to the circle center of the rotary feeding table, the jigs are used for loading IGBT devices, and the cooling box is arranged on the rotary feeding table. The rotary feeding table is used for driving a jig loaded with the IGBT device at the feeding station to rotate to the testing station and enabling a terminal of the IGBT device to be aligned with a terminal of the terminal connecting module, a pressing mechanism is arranged at the position adjacent to the terminal connecting module and used for pressing the terminal of the IGBT device and the terminal of the terminal connecting module, a water cooling mechanism is arranged in the cooling box, and the water cooling mechanism is used for cooling the IGBT device and the terminal of the terminal connecting module. And the water cooling mechanism is arranged adjacent to the test station and is used for carrying out water cooling on the IGBT device loaded on the jig. According to the utility model, the IGBT device can be loaded and unloaded during testing, the IGBT device can be reliably clamped and fixed, and the cooling efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to testing equipment for electronic devices, and more particularly to an IGBT testing device. Background Technology

[0002] As a power device, IGBTs require testing after production. This includes connecting the IGBT to a pre-set test module for power-on testing. To simulate real-world application environments, the IGBT needs to be cooled during testing. Traditionally, IGBTs are manually mounted onto cooling fixtures before being connected to the test module. This method is inefficient and prone to errors. While automated equipment has emerged, capable of automatically transporting IGBTs to the testing station, such equipment often requires system shutdown when changing IGBTs. Furthermore, it cannot guarantee a reliable connection between the IGBT and the test module, and its cooling efficiency is insufficient to meet application requirements. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an IGBT testing device that can perform loading and unloading operations on IGBT devices during testing, reliably clamp the IGBT devices, and help improve cooling efficiency, in order to address the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0005] An IGBT testing device includes a rotary loading platform, a terminal connection module, a cooling box, a loading station, and a testing station. The rotary loading platform is located on top of the cooling box. The terminal connection module is adjacent to the testing station. The rotary loading platform has two fixtures symmetrically arranged relative to its center. The fixtures are used to load IGBT devices. The rotary loading platform is used to rotate the fixtures loaded with IGBT devices at the loading station to the testing station, aligning the terminals of the IGBT devices with the terminals of the terminal connection module. A clamping mechanism is provided adjacent to the terminal connection module to clamp the terminals of the IGBT devices with the terminals of the terminal connection module. A water cooling mechanism is provided inside the cooling box and is adjacent to the testing station. The water cooling mechanism is used to cool the IGBT devices loaded on the fixtures.

[0006] Preferably, the system includes a frame, and the rotating loading platform, the terminal connection module, and the cooling box are all fixed on the frame.

[0007] Preferably, the cooling box is provided with a rotary drive mechanism for driving the rotary loading platform to rotate.

[0008] Preferably, a lifting mechanism is provided above the test station, and a connecting motherboard is provided at the lifting end of the lifting mechanism. A test probe is provided at the bottom of the connecting motherboard. The lifting mechanism is used to drive the connecting motherboard to descend so that the test probe can be electrically connected to the pins on the top of the IGBT device.

[0009] Preferably, a gantry frame is fixed on the frame, and the lifting mechanism is fixed on the gantry frame.

[0010] Preferably, the lifting mechanism is a cylinder, and the lifting end of the lifting mechanism is fixed with a lifting plate, and the connecting main board is embedded in the lifting plate.

[0011] Preferably, the rotary loading table is equipped with device clamping mechanisms located on both sides of the fixture, the device clamping mechanisms being used to clamp the IGBT device onto the fixture.

[0012] Preferably, the device clamping mechanism includes a clamping arm support, a clamping arm, and a clamping arm drive cylinder. One end of the clamping arm is hinged to the clamping arm support, and the other end of the clamping arm extends above the fixture. The clamping arm drive cylinder is used to drive the clamping arm to swing downward to clamp the IGBT device.

[0013] Preferably, two clamping arms are hinged to the clamping arm support, and a clamping arm connecting rod is connected between the two clamping arms. The moving end of the clamping arm drive cylinder is connected to the clamping arm connecting rod for transmission.

[0014] Preferably, the rotating loading platform is fixed with clamping cylinder fixing blocks respectively disposed on both sides of the clamping arm drive cylinder, and a follower rotating seat is rotatably connected between the two clamping cylinder fixing blocks, and the bottom end of the clamping arm drive cylinder is fixedly connected to the follower rotating seat.

[0015] In the IGBT testing equipment disclosed in this utility model, the rotating loading platform is equipped with two symmetrical fixtures, one for the loading station and the other for the testing station. When the IGBT device is loaded onto the fixture, the rotating loading platform rotates, causing the fixture loaded with the IGBT device to rotate to the testing station. The clamping mechanism clamps the terminals of the IGBT device to the terminals of the terminal connection module. Simultaneously, the water-cooling mechanism cools the IGBT device loaded on the fixture using water cooling. Afterward, the terminal connection module starts testing the IGBT device. Compared with the prior art, this utility model, with its rotating loading platform combined with the loading station and the testing station, can perform loading and unloading operations on the IGBT device during testing, thus achieving the function of changing the IGBT device without stopping the machine. Furthermore, the clamping mechanism reliably clamps the IGBT device, thereby improving the testing accuracy of the terminal connection module for the IGBT device, better meeting application requirements. Attached Figure Description

[0016] Figure 1 Internal structure of IGBT testing equipment Figure 1 ;

[0017] Figure 2 Internal structure of IGBT testing equipment Figure 2 ;

[0018] Figure 3 This is a structural diagram of the device clamping mechanism;

[0019] Figure 4 A structural diagram for testing the crimping device;

[0020] Figure 5 A side view of the test crimping device;

[0021] Figure 6 for Figure 5 Enlarged view of section A;

[0022] Figure 7 Structure of the water cooling mechanism Figure 2 ;

[0023] Figure 8 Internal structure of the cooling box Figure 1 ;

[0024] Figure 9 Disassembly of the cooling box Figure 1 ;

[0025] Figure 10 Disassembly of the cooling box Figure 2 ;

[0026] Figure 11 Internal structure of the cooling box Figure 2 ;

[0027] Figure 12 This is a diagram of the circulating water system structure.

[0028] Figure 13 For water removal air knife structure Figure 1 ;

[0029] Figure 14 For water removal air knife structure Figure 2 . Detailed Implementation

[0030] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0031] This utility model discloses an IGBT testing device. Please refer to [link / reference]. Figures 1 to 3 The device includes a rotating loading platform 1, a terminal connection module 2, a cooling box 3, a loading station, and a testing station. The rotating loading platform 1 is located on top of the cooling box 3. The terminal connection module 2 is adjacent to the testing station. The rotating loading platform 1 has two fixtures 4 symmetrically arranged relative to its center. The fixtures 4 are used to load IGBT devices 100. The rotating loading platform 1 is used to drive the fixtures 4 loaded with IGBT devices 100 at the loading station to rotate to the testing station and align the terminals of the IGBT devices 100 with the terminals of the terminal connection module 2. A clamping mechanism is provided adjacent to the terminal connection module 2. The clamping mechanism is used to clamp the terminals of the IGBT devices 100 with the terminals of the terminal connection module 2. The cooling box 3 has a water cooling mechanism 5, which is adjacent to the testing station. The water cooling mechanism 5 is used to cool the IGBT devices 100 loaded on the fixtures 4.

[0032] In the above structure, the rotating loading table 1 is provided with two symmetrical jigs 4, which correspond to the loading station and the testing station respectively. When the IGBT device 100 is loaded onto the jig 4, the rotating loading table 1 operates and drives the jig 4 loaded with the IGBT device 100 to rotate to the testing station. The clamping mechanism clamps the terminals of the IGBT device 100 to the terminals of the terminal connection module 2. At the same time, the water cooling mechanism 5 cools the IGBT device 100 loaded on the jig 4 by water cooling. Then, the terminal connection module 2 starts the test of the IGBT device 100. Compared with the prior art, the present invention adopts the structure of the rotating loading table 1 combined with the loading station and the testing station, which can perform loading and unloading operations on IGBT devices while testing, thereby realizing the function of replacing IGBT devices without stopping the machine. At the same time, the clamping mechanism can reliably clamp the IGBT devices, thereby improving the testing accuracy of the terminal connection module 2 on the IGBT devices 100, and better meeting the application requirements.

[0033] Furthermore, this embodiment includes a frame 6, on which the rotating loading platform 1, the terminal connection module 2, and the cooling box 3 are all fixed. For easy repositioning, the bottom of the frame 6 is equipped with casters 600.

[0034] In this embodiment, the cooling tank 3 is equipped with a rotary drive mechanism 10 for driving the rotary loading platform 1 to rotate. Simultaneously, the water cooling mechanism 5 is also installed inside the cooling tank 3. In practical applications, the water cooled by the water cooling mechanism 5 after cooling the IGBT device 100 can directly fall back into the cooling tank 3, and then be filtered and circulated back to the water intake end of the water cooling mechanism 5. This embodiment, by setting up the cooling tank 3, can not only accommodate the water cooling mechanism 5 and the rotary drive mechanism 10, but also realize the functions of water supply and storage.

[0035] As a preferred embodiment, this embodiment also includes an IGBT device pin testing motherboard, please refer to [link / reference]. Figure 2 A lifting mechanism 7 is provided above the testing station. A connecting motherboard 70 is provided at the lifting end of the lifting mechanism 7. A test probe 71 is provided at the bottom of the connecting motherboard 70. The lifting mechanism 7 is used to drive the connecting motherboard 70 to descend, so that the test probe 71 can be electrically connected to the pins on the top of the IGBT device 100. Furthermore, a gantry frame 60 is fixed on the frame 6, and the lifting mechanism 7 is fixed on the gantry frame 60.

[0036] In order to achieve reliable lifting and lowering motion, in this embodiment, the lifting and lowering motion mechanism 7 is a cylinder, and the lifting and lowering motion end of the lifting and lowering motion mechanism 7 is fixed with a lifting and lowering motion plate 72, and the connecting main board 70 is embedded in the lifting and lowering motion plate 72.

[0037] In this embodiment, the device clamping mechanism 40 is used to clamp the IGBT device 100 on the fixture 4. Please refer to [link to documentation]. Figure 3 The rotating loading table 1 is equipped with device clamping mechanisms 40 located on both sides of the fixture 4. The device clamping mechanisms 40 are used to clamp the IGBT device 100 onto the fixture 4. Based on the device clamping mechanisms 40, reliable connection between the terminals of the IGBT device 100 and the terminals of the terminal connection module 2 can be ensured, and cooling water leakage can be avoided during the water cooling process.

[0038] For a preferred structure of the device clamping mechanism 40, please refer to [link to documentation]. Figure 3 In this embodiment, the device clamping mechanism 40 includes a clamping arm support 41, a clamping arm 42, and a clamping arm drive cylinder 43. One end of the clamping arm 42 is hinged to the clamping arm support 41, and the other end of the clamping arm 42 extends above the fixture 4. The clamping arm drive cylinder 43 is used to drive the clamping arm 42 to swing downward to clamp the IGBT device 100.

[0039] To ensure stress balance on both sides, in this embodiment, two clamping arms 42 are hinged on the clamping arm support 41, and a clamping arm connecting rod 44 is connected between the two clamping arms 42. The moving end of the clamping arm drive cylinder 43 is connected to the clamping arm connecting rod 44 for transmission.

[0040] In this embodiment, a cylinder is preferably used to drive the two clamping arms 42 to move synchronously. Specifically, the rotating loading table 1 has clamping cylinder fixing blocks 45 fixed on both sides of the clamping arm driving cylinder 43. A follower rotating seat 46 is rotatably connected between the two clamping cylinder fixing blocks 45, and the bottom end of the clamping arm driving cylinder 43 is fixedly connected to the follower rotating seat 46. In practical applications, to avoid jamming during the movement of the clamping arm driving cylinder 43, a hinge or universal joint can be set at an appropriate connection point to ensure that the clamping arm driving cylinder 43 reliably drives the two clamping arms 42 to move synchronously.

[0041] This embodiment relates to a power-on testing crimping device; please refer to [link / reference]. Figure 4 , Figure 5 and Figure 6It includes a crimping test bench 20, on which a crimping motion platform 21 capable of translating back and forth is provided. A terminal connection module 2 is mounted on the crimping motion platform 21. An upper terminal 200 and a lower terminal 201 are provided on the front side of the terminal connection module 2. When the crimping motion platform 21 moves towards the IGBT device 100 under test, the terminal 101 of the IGBT device 100 is brought between the upper terminal 200 and the lower terminal 201. An upper clamping rod 22 and a lower clamping rod are provided on the front side of the terminal connection module 2. The upper clamping rod 22 and the lower clamping rod 23 are parallel to each other and both extend laterally. The upper clamping rod 22 is located above the upper terminal 200, and the lower clamping rod 23 is located below the lower terminal 201. The pressing motion platform 21 is provided with a clamping rod driving mechanism for driving the upper clamping rod 22 and the lower clamping rod 23 to move relative to each other. The clamping force applied by the upper clamping rod 22 and the lower clamping rod 23 clamps the terminal 101 of the IGBT device 100 between the upper terminal 200 and the lower terminal 201.

[0042] In the above structure, the IGBT device 100 to be tested is mounted on a preset fixture. When the IGBT device 100 is in the test position, the terminals 101 of the IGBT device 100 are aligned with the gap between the upper terminal 200 and the lower terminal 201. Then, the pressing motion platform 21 drives the terminal connection module 2 to translate, so that the terminals 101 of the IGBT device 100 enter between the upper terminal 200 and the lower terminal 201. Then, the clamping rod driving mechanism drives the upper clamping rod 22 and the lower clamping rod 22 to move together. As the rods 23 move relative to each other, the clamping force applied by the upper clamping rod 22 and the lower clamping rod 23 clamps the terminal 101 of the IGBT device 100 between the upper terminal 200 and the lower terminal 201. Compared with the prior art, in this invention, the upper terminal 200 and the lower terminal 201 are simultaneously attached to the upper and lower sides of the terminal 101, which makes the contact area between the IGBT device and the test module terminal larger. This not only improves the connection reliability between the terminals, but also allows it to withstand a larger current, thus better meeting the application requirements.

[0043] In this embodiment, the crimping test platform 20 adopts a sliding translation method. Specifically, the crimping test platform 20 is provided with two parallel slide rails 24, and the crimping motion platform 21 is slidably connected to the two slide rails 24.

[0044] Regarding the translational driving method of the crimping test bench 20, a linear module or a linear cylinder can be used for driving. In this embodiment, a cylinder is preferred to provide the translational driving force. Specifically, the bottom of the crimping test bench 20 is equipped with a front-to-back translational driving cylinder 25. The telescopic rod of the front-to-back translational driving cylinder 25 is in transmission cooperation with the crimping motion platform 21, thereby driving the crimping motion platform 21 to translate back and forth. In practical applications, to ensure that the front-to-back translational driving cylinder 25 has sufficient driving stroke, a pen-shaped cylinder is preferably used.

[0045] As a preferred embodiment, the upper clamping rod 22 is provided with an upper soft rubber pad 220 on the side facing the upper terminal 200, and the lower clamping rod 23 is provided with a lower soft rubber pad 230 on the side facing the lower terminal 201. The upper soft rubber pad 220 and the lower soft rubber pad 230 are used for direct contact with the terminal. The soft rubber pads prevent scratches on the terminal surface and also provide elastic cushioning.

[0046] In this embodiment, the clamping rod driving mechanism includes two clamping rod driving cylinders 260, two clamping rod supports 261, two V-shaped upper clamping rod swing arms 262, and two V-shaped lower clamping rod swing arms 263. The two clamping rod supports 261 are respectively fixed to the pressing motion platform 21 on both sides of the terminal connection module 2. The two clamping rod driving cylinders 260 are respectively fixed to the rear ends of the two clamping rod supports 261. The bent parts of the two upper clamping rod swing arms 262 are rotatably connected to the two clamping rod supports 261. The upper clamping rod 22 is fixed between the front ends of the two upper clamping rod swing arms 262. The bent parts of the two lower clamping rod swing arms 263 are rotatably connected to the two clamping rod supports 261 respectively. The lower clamping rod 23 is fixed between the front ends of the two lower clamping rod swing arms 263. The moving end of the clamping rod drive cylinder 260 is hinged with an upper connecting rod 264 and a lower connecting rod 265. The front end of the upper connecting rod 264 is hinged to the rear end of the upper clamping rod swing arm 262, and the front end of the lower connecting rod 265 is hinged to the rear end of the lower clamping rod swing arm 263.

[0047] In the above structure, when the clamping rod drive cylinder 260 moves forward, the upper connecting rod 264 and the lower connecting rod 265 push the rear ends of the upper clamping rod swing arm 262 and the lower clamping rod swing arm 263 forward. Based on the rotational connection between the bent part of the upper clamping rod swing arm 262 and the clamping rod support 261, the front ends of the upper clamping rod swing arm 262 and the front ends of the lower clamping rod swing arm 263 are driven to move closer together, thereby forming a clamping force on the upper terminal 200 and the lower terminal 201, ensuring that the upper terminal 200 and the lower terminal 201 are in reliable contact with the terminal 101 of the IGBT device 100.

[0048] In this embodiment, the upper clamping arm 262 and the upper connecting rod 264 are preferably housed inside the clamping rod support 261. Specifically, the clamping rod support 261 has a receiving opening 266, and both the upper clamping arm 262 and the upper connecting rod 264 are disposed within the receiving opening 266. Further, the receiving opening 266 extends to the front end of the clamping rod support 261.

[0049] This embodiment includes a water-cooling mechanism; please refer to [link / reference]. Figure 7 and Figure 8 The device includes a rotating loading platform 1, on which a fixture 4 is provided. The fixture 4 includes a cutout 400 for loading an IGBT device 100 to be tested, and the IGBT device 100 covers the cutout 400. An air-avoidance opening 102 is provided on the rotating loading platform 1, which is aligned with and connected to the cutout 400. A water supply platform 50 and a water supply drive mechanism 51 for driving the water supply platform 50 to move up and down are provided below the rotating loading platform 1. The water supply platform 50 is aligned with the air-avoidance opening 102. When the water supply drive mechanism 51 drives the water supply platform 50 to rise, a water-cooling cavity is formed by the bottom surface of the IGBT device 100, the cutout 400, the air-avoidance opening 102, and the top surface of the water supply platform 50. A water supply port 53 for spraying water into the water-cooling cavity is provided on the top surface of the water supply platform 50. In the above structure, the rotating loading platform 1, through rotational motion, transports the fixture 4, which carries the IGBT device 100 to be tested, above the water supply platform 50, so that the water supply platform 50 is aligned with the clearance opening 102. Then, the water supply drive mechanism 51 drives the water supply platform 50 to rise, causing the water supply platform 50 to contact the edge of the clearance opening 102. At this time, the bottom surface of the IGBT device 100, the clearance opening 400, the clearance opening 102, and the top surface of the water supply platform 50 together form a water-cooling cavity, which is then cooled by the water supply... Water is sprayed into the water-cooling cavity from the water inlet 53 on the top surface of the water platform 50. Because the water sprayed upward from the water inlet 53 is directly sprayed onto the bottom surface of the IGBT device 100, the cooling water is in full contact with the bottom surface of the IGBT device 100, which greatly improves the cooling efficiency of the IGBT device 100. After the test is completed, the water supply drive mechanism 51 drives the water supply platform 50 to descend, and the water supply platform 50 separates from the air vent 102. At this time, the water in the water-cooling cavity can be quickly discharged and drained, which can effectively improve the working efficiency.

[0050] This embodiment features a rotary feeding and cooling box; please refer to [link / reference]. Figures 8 to 11As shown, it includes a rotating loading platform 1, an upper box 30 with its opening facing downwards, and a lower box 31 with its opening facing upwards. Both the upper box 30 and the lower box 31 are cylindrical boxes. The lower end of the upper box 30 is inserted into the lower box 31, and the upper box 30 and the lower box 31 are rotatably connected. A loading platform support 103 is fixedly installed inside the lower box 31, and a rotary drive mechanism 10 is fixedly installed on the loading platform support 103. The center of the upper box 30 is aligned with the drive shaft of the rotary drive mechanism 10. The rotating loading platform 1 is fixedly installed on the top of the upper box 30. The fixture 4 is fixedly installed on the rotating loading platform 1. The loading platform support 103 is provided with a water cooling mechanism 5 for injecting water into the fixture 4. The lower box 31 is filled with cooling water. The water cooling mechanism 5 is used to draw cooling water into the lower box 31 and inject it into the fixture 4. The cooling water discharged from the fixture 4 falls into the lower box 31. The water level in the lower box 31 is greater than the lower edge height of the upper box 30.

[0051] In the above structure, the upper housing 30 has an opening facing downwards, and the lower housing 31 has an opening facing upwards. During installation, the lower housing 31 is fixed to the frame, the opening of the upper housing 30 is inverted and inserted into the lower housing 31, and the upper housing 30 and the lower housing 31 are kept in a rotatable relationship. The loading platform support 103 is fixedly installed inside the lower housing 31. The upper housing 30 is coaxially fixedly connected to the drive shaft of the rotary drive mechanism 10, and the rotary loading platform 1 is fixedly installed on the top of the upper housing 30. When the rotary drive mechanism 10 is working, it can drive the upper housing 30 and the rotary loading platform. 1. Synchronous operation: The cooling water level stored in the lower housing 31 exceeds the boundary line between the upper housing 30 and the lower housing 31, thereby sealing the boundary between the upper housing 30 and the lower housing 31. In practical applications, the water cooling mechanism 5 can directly draw cooling water into the lower housing 31 and inject it into the fixture 4. The water in the fixture 4 after cooling the IGBT device can also be directly discharged into the lower housing 31. Compared with the prior art, this utility model can integrate the cooling box under the loading platform, which not only realizes the rotation of the loading platform for material transportation, but also has a better sealing effect, while saving the space occupied by the equipment, making the equipment smaller and more integrated.

[0052] To facilitate the routing of water pipes, gas pipes, cables and other pipeline equipment, in this embodiment, the lower housing 31 is provided with an upwardly extending sleeve 310. The vertical height of the sleeve 310 is greater than the water level height inside the lower housing 31, and the pipelines of the rotary drive mechanism 10 and the water cooling mechanism 5 pass through the sleeve 310.

[0053] In practical applications, the pipeline passing through the sleeve 310 needs to be connected to the rotary drive mechanism 10 and the water cooling mechanism 5. In this embodiment, a through hole 105 is provided on the loading platform support 103, and the sleeve 310 passes through the through hole 105.

[0054] In order to enable the upper housing 30 to rotate relative to the lower housing 31 and to avoid positional interference between the upper housing 30 and the lower housing 31, in this embodiment, there is a gap between the upper housing 30 and the lower housing 31.

[0055] In a preferred embodiment, the lower housing 31 is provided with a cooling circulation pipe 32, which is immersed in cooling water and connected to a pre-designed cold water circulation device. Further, the cooling circulation pipe 32 is spirally coiled, with at least two turns. In this embodiment, the cooling circulation pipe 32 extends along the bottom edge of the lower housing 31. In the above structure, the cooling circulation pipe 32 is connected to an external cold water circulation device, and its function is to assist in cooling the water inside the lower housing 31, thereby ensuring the cooling effect of the cooling water.

[0056] Based on this, this embodiment also features a circulating water system structure; please refer to [link / reference]. Figure 11 and Figure 12 It includes a frame 6, a cooling box 3 on the frame 6, a rotating loading platform 1 on the top of the cooling box 3, a fixture 4 fixedly installed on the rotating loading platform 1, a water cooling mechanism 5 for injecting water into the fixture 4 inside the cooling box 3, cooling water discharged from the fixture 4 falling back into the cooling box 3, a water intake pipe 61 connected to the bottom of the cooling box 3, a cooling water pump 62 on the frame 6, the lower end of the water intake pipe 61 connected to the inlet of the cooling water pump 62, and the outlet of the cooling water pump 62 connected to the water guide interface of the water cooling mechanism 5.

[0057] In the above structure, the cooling tank 3 is equipped with a water cooling mechanism 5, and the frame 6 has a cooling water pump 62 near its lower end. The cooling water pump 62 draws water into the cooling tank 3 through the water intake pipe 61, and then delivers it to the water inlet of the water cooling mechanism 5. The water cooling mechanism 5 then delivers the water to the fixture 4 to cool the IGBT devices on the fixture 4. The cooling tank 3, the water intake pipe 61, the cooling water pump 62, and the water cooling mechanism 5 form a cooling water circulation path, which can not only quickly discharge the cooling water in the fixture 4 to achieve rapid water return, but also simplify the cooling water circulation path and better meet the application requirements.

[0058] Regarding the preferred connection method between the cooling water pump 62 and the water-cooling mechanism 5, in this embodiment, the outlet of the cooling water pump 62 is connected to a water supply pipe 63. The upper end of the water supply pipe 63 passes through the bottom of the cooling tank 3 and connects to the water inlet. Preferably, the water supply pipe 63 is a vertically upward extending pipe. The water supply pipe 63 needs to pass through the bottom of the cooling tank 3 and ensure that the connection between the two is sealed. The upper end of the water supply pipe 63 connects to the water inlet of the water-cooling mechanism 5, thereby forming a complete water supply loop.

[0059] In this embodiment, the lower end of the water intake pipe 61 is connected to the inlet of the cooling water pump 62 via the return water hose 64.

[0060] Furthermore, the cooling water pump 62 is located near the lower end of the frame 6. In this structure, the cooling water in the cooling tank 3 is transported to the inlet of the cooling water pump 62 via the water intake pipe 61. In this embodiment, the cooling water pump 62 is preferably positioned near the lower end of the frame 6. Under the influence of gravity, the cooling water in the cooling tank 3 naturally flows to the inlet of the cooling water pump 62, ensuring that the cooling water pump 62 draws sufficient water.

[0061] In practical applications, in order to keep the cooling water delivered by the cooling water pump 62 clean, in this embodiment, a water filtration mechanism 65 is provided on the water intake pipe 61.

[0062] The IGBT testing equipment in this embodiment includes a dewatering air knife; please refer to [link / reference needed]. Figure 13 and Figure 14 It includes a rotary loading platform 1, on which a fixture 4 is provided. The fixture 4 includes a cutout 400. An clearance opening 102 is provided on the rotary loading platform 1. The clearance opening 102 is aligned with and communicates with the cutout 400. The IGBT device 100 to be tested is mounted on the fixture 4. An air knife translation mechanism 83 is provided below the rotary loading platform 1. A high-speed fan 80 is provided at the moving end of the air knife translation mechanism 83. The top of the high-speed fan 80... The device is provided with an air knife body 81, which has an air cavity inside. The air cavity is connected to the air outlet of the high-speed fan 80. A straight air groove 82 is formed on the top of the air knife body 81. The straight air groove 82 is aligned with the heat sinks 104 densely distributed on the bottom of the IGBT device 100. When the air knife translation mechanism 83 drives the high-speed fan 80 and the air knife body 81 to translate, the airflow blown out by the straight air groove 82 removes water droplets in the heat sinks 104.

[0063] In the above structure, the fixture 4 mounted on the top of the rotating loading platform 1 is used to load the IGBT device 100 to be tested. The IGBT device 100 covers the cutout 400 and the clearance opening 102, and forms a water-cooled chamber with the water supply mechanism below the rotating loading platform 1. The IGBT device 100 is cooled by injecting water into the water-cooled chamber. After the test is completed and the water is drained, the rotating loading platform 1 rotates to align the clearance opening 102 and the cutout 400 with the air knife body 81. At this time, the straight air groove 82 is aligned with the IGBT device. The heat sinks 104 are densely distributed at the bottom of the IGBT device 100. The air knife translation mechanism 83 drives the high-speed fan 80 and the air knife body 81 to translate along the length of the IGBT device 100. Based on the high-speed operation of the high-speed fan 80, a high-speed airflow is generated in the air knife body 81. The high-speed airflow forms a straight air knife through the straight air groove 82 and directly faces the heat sinks 104 densely distributed at the bottom of the IGBT device 100. Under the blowing of the straight high-speed airflow, the residual water at the bottom of the IGBT device 100 is quickly removed, so the water removal efficiency is higher.

[0064] In order to concentrate the high-speed airflow delivered by the air knife body 81, in this embodiment, the top of the air knife body 81 is provided with an air collecting end 84, and the straight air groove 82 is provided at the top of the air collecting end 84.

[0065] Furthermore, the width of the air collecting end 84 gradually decreases from bottom to top. The air collecting end 84 has a structure that is narrower at the top and wider at the bottom. An air cavity is provided inside the air knife body 81. When the high-speed airflow in the air cavity passes through the air collecting end 84, the air collecting end 84 converges, causing the high-speed airflow to be concentrated and blown towards the bottom surface of the IGBT device 100 through the straight air groove 82. Combined with the lateral movement of the air knife translation mechanism 83, the straight air knife sweeps across the bottom surface of the IGBT device 100, thereby efficiently removing residual water from the bottom surface of the IGBT device 100.

[0066] Regarding the specific movement mode of the air knife translation mechanism 83, in this embodiment, the air knife translation mechanism 83 includes a horizontal movement cylinder 830, and a vertical movement cylinder 831 is provided at the moving end of the horizontal movement cylinder 830. The high-speed fan 80 is fixed to the moving end of the vertical movement cylinder 831. In the above structure, under the combined action of the horizontal movement cylinder 830 and the vertical movement cylinder 831, the air knife body 81 can be driven to move horizontally below the IGBT device 100. Then, the vertical movement cylinder 831 drives the air knife body 81 to rise and approach the bottom surface of the IGBT device 100. During the sweeping operation, the horizontal movement cylinder 830 again drives the air knife body 81 to move horizontally, so that the straight air knife can quickly remove the residual water on the bottom surface of the IGBT device 100.

[0067] In order to install and fix the air knife translation mechanism 83, in this embodiment, a loading platform support 103 is provided below the rotating loading platform 1, and the transverse motion cylinder 830 is fixed to the side of the loading platform support 103.

[0068] In this embodiment, a cooling box is provided below the rotating loading platform 1. The loading platform support 103, the air knife translation mechanism 83, the high-speed fan 80, and the air knife body 81 are all located inside the cooling box. In the above structure, the high-speed fan 80 can directly draw air into the cooling box. This structure allows the high-speed airflow to circulate directly within the cooling box, thereby maintaining the balance between the inside and outside of the box.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. All modifications, equivalent substitutions or improvements made within the technical scope of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. An IGBT testing device, characterized in that, The device includes a rotary loading platform, a terminal connection module, a cooling box, a loading station, and a testing station. The rotary loading platform is located on top of the cooling box. The terminal connection module is adjacent to the testing station. The rotary loading platform has two fixtures symmetrically arranged relative to its center. The fixtures are used to load IGBT devices. The rotary loading platform is used to rotate the fixture loaded with the IGBT devices at the loading station to the testing station, aligning the terminals of the IGBT devices with the terminals of the terminal connection module. A clamping mechanism is located adjacent to the terminal connection module to clamp the terminals of the IGBT devices with the terminals of the terminal connection module. The cooling box contains a water cooling mechanism, which is adjacent to the testing station and is used to cool the IGBT devices loaded on the fixtures.

2. The IGBT testing equipment as described in claim 1, characterized in that, The system includes a frame, and the rotating loading platform, the terminal connection module, and the cooling box are all fixed on the frame.

3. The IGBT testing equipment as described in claim 1, characterized in that, The cooling box is equipped with a rotary drive mechanism for driving the rotary loading platform to rotate.

4. The IGBT testing equipment as described in claim 2, characterized in that, A lifting mechanism is provided above the test station. The lifting mechanism has a connecting motherboard at its lifting end. A test probe is provided at the bottom of the connecting motherboard. The lifting mechanism is used to drive the connecting motherboard to descend so that the test probe can be electrically connected to the pins on the top of the IGBT device.

5. The IGBT testing equipment as described in claim 4, characterized in that, A gantry frame is fixed on the frame, and the lifting mechanism is fixed on the gantry frame.

6. The IGBT testing equipment as described in claim 4, characterized in that, The lifting mechanism is a cylinder, and a lifting plate is fixed to the lifting end of the lifting mechanism. The main connecting plate is embedded in the lifting plate.

7. The IGBT testing equipment as described in claim 1, characterized in that, The rotary loading table is equipped with device clamping mechanisms located on both sides of the fixture. The device clamping mechanisms are used to clamp the IGBT device onto the fixture.

8. The IGBT testing equipment as described in claim 7, characterized in that, The device clamping mechanism includes a clamping arm support, a clamping arm, and a clamping arm drive cylinder. One end of the clamping arm is hinged to the clamping arm support, and the other end of the clamping arm extends above the fixture. The clamping arm drive cylinder is used to drive the clamping arm to swing downward to clamp the IGBT device.

9. The IGBT testing equipment as described in claim 8, characterized in that, Two clamping arms are hinged to the clamping arm support, and a clamping arm connecting rod is connected between the two clamping arms. The moving end of the clamping arm drive cylinder is connected to the clamping arm connecting rod for transmission.

10. The IGBT testing equipment as described in claim 8, characterized in that, The rotating loading platform is fixed with clamping cylinder fixing blocks located on both sides of the clamping arm drive cylinder. A follower rotating seat is rotatably connected between the two clamping cylinder fixing blocks. The bottom end of the clamping arm drive cylinder is fixedly connected to the follower rotating seat.

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