IGBT (Insulated Gate Bipolar Translator) test equipment

Abstract

The invention discloses IGBT test equipment 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, two jigs which are symmetrically arranged relative to the circle center of the rotary feeding table are arranged on the rotary feeding table, and the jigs are used for loading IGBT devices. 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 invention, loading and unloading operation can be carried out on the IGBT device while testing is carried out, the IGBT device can be reliably clamped and fixed, and the cooling efficiency can be improved.

Description

Technical Field

[0001] The invention relates to electronic device testing equipment, in particular to an IGBT testing equipment. Background Art

[0002] As a power device, IGBT needs to undergo testing steps after production, including connecting the IGBT device to a preset test module for power-on testing. In order to simulate the actual application environment, the IGBT device needs to be cooled during the test. The traditional testing method is to manually load the IGBT device on a fixture with a cooling function, and then connect the test module for testing. This testing method is not only inefficient, but also has a high error rate. With the development of automated equipment, there are existing technologies that can automatically transport IGBT devices to test stations for testing. Most of these devices require shutdown operations when replacing IGBT devices, and cannot guarantee reliable connection between the IGBT device and the test module. In addition, the cooling efficiency is insufficient and cannot meet application requirements. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an IGBT testing device which can load and unload IGBT devices during testing, can reliably clamp IGBT devices, and helps to improve cooling efficiency in view of the deficiencies in the prior art.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0005] An IGBT testing device comprises a rotary loading platform, a terminal connection module, a cooling box, a loading station and a testing station, wherein the rotary loading platform is arranged on the top of the cooling box, the terminal connection module is arranged adjacent to the testing station, the rotary loading platform is provided with two jigs symmetrically arranged relative to the center of the circle, the jigs are used to load IGBT devices, the rotary loading platform is used to drive the jig loaded with the IGBT device at the loading station to rotate to the testing station, and align the terminals of the IGBT device with the terminals of the terminal connection module, a clamping mechanism is provided adjacent to the terminal connection module, the clamping mechanism is used to clamp the terminals of the IGBT device with the terminals of the terminal connection module, a water cooling mechanism is provided in the cooling box, the water cooling mechanism is arranged adjacent to the testing station, and the water cooling mechanism is used to water-cool the IGBT device loaded on the jig.

[0006] Preferably, a frame is included, and the rotary loading platform, the terminal connection module and the cooling box are all fixed on the frame.

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

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

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

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

[0011] Preferably, the rotary loading platform is equipped with device clamping mechanisms which are arranged on both sides of the jig, and the device clamping mechanisms are used to clamp the IGBT device onto the jig.

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

[0013] Preferably, two clamping arms are hinged on the clamping arm support, a clamping arm connecting rod is connected between the two clamping arms, and the moving end of the clamping arm driving cylinder is drivingly connected to the clamping arm connecting rod.

[0014] Preferably, the rotating loading table is fixed with clamping cylinder fixing blocks which are arranged on both sides of the clamping arm driving cylinder, a follower swivel seat is rotatably connected between the two clamping cylinder fixing blocks, and the bottom end of the clamping arm driving cylinder is fixedly connected to the follower swivel seat.

[0015] In the IGBT testing equipment disclosed in the present invention, two front-to-back symmetrical jigs are provided on the rotating loading platform, and the two jigs correspond to the loading station and the testing station respectively. When the IGBT device is loaded on the jig, the rotating loading platform operates and drives the jig loaded with the IGBT device to rotate to the testing station, and the terminals of the IGBT device and the terminals of the terminal connection module are pressed by the clamping mechanism, and at the same time, the water cooling mechanism cools the IGBT device loaded on the jig by water cooling, and then the terminal connection module starts testing the IGBT device. Compared with the prior art, the present invention adopts the structure of the rotating loading platform in conjunction with the loading station and the testing station, which can load and unload the IGBT device while testing, thereby realizing the function of replacing the IGBT device without stopping the machine, and at the same time, the clamping mechanism can reliably clamp the IGBT device, thereby improving the test accuracy of the terminal connection module on the IGBT device, which better meets the application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Internal structure of IGBT test equipment Figure 1 ; Figure 2 Internal structure of IGBT test equipment Figure 2 ; Figure 3 is a structural diagram of the device clamping mechanism; Figure 4 The structural diagram of the test crimping device; Figure 5 A side view of the test crimping device; Figure 6 for Figure 5 A magnified view of part A; Figure 7 The structure of the water cooling mechanism Figure 2 ; Figure 8 The internal structure of the cooling box Figure 1 ; Fig. 9 Disassembly of cooling box Figure 1 ; Fig.10 Disassembly of cooling box Figure 2 ; Fig.11 The internal structure of the cooling box Figure 2 ; Fig.12 This is the structural diagram of the circulating water circuit; Fig.13 For dewatering air knife structure Figure 1 ; Fig.14 For dewatering air knife structure Figure 2 . DETAILED DESCRIPTION

[0017] The present invention is described in more detail below with reference to the accompanying drawings and embodiments.

[0018] The present invention discloses an IGBT testing device, see Figures 1 to 3 , which includes a rotary loading platform 1, a terminal connection module 2, a cooling box 3, a loading station and a testing station, wherein the rotary loading platform 1 is arranged on the top of the cooling box 3, the terminal connection module 2 is arranged adjacent to the testing station, the rotary loading platform 1 is provided with two jigs 4 arranged symmetrically relative to its center, the jig 4 is used to load the IGBT device 100, the rotary loading platform 1 is used to drive the jig 4 loaded with the IGBT device 100 at the loading station to rotate to the testing station, and align the terminals of the IGBT device 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 device 100 with the terminals of the terminal connection module 2, a water cooling mechanism 5 is provided in the cooling box 3, the water cooling mechanism 5 is arranged adjacent to the testing station, and the water cooling mechanism 5 is used to water-cool the IGBT device 100 loaded on the jig 4.

[0019] In the above structure, two front-to-back symmetrical jigs 4 are provided on the rotating loading table 1, and the two jigs 4 correspond to the loading station and the testing station respectively. When the IGBT device 100 is loaded on 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, and the terminals of the IGBT device 100 and the terminals of the terminal connection module 2 are pressed by the clamping mechanism. At the same time, the water cooling mechanism 5 cools the IGBT device 100 loaded on the jig 4 by water cooling, and then the terminal connection module 2 starts testing the IGBT device 100. Compared with the prior art, the present invention adopts the structure of the rotating loading table 1 in conjunction with the loading station and the testing station, which can load and unload the IGBT device while testing, thereby realizing the function of replacing the IGBT device without stopping the machine. At the same time, the clamping mechanism can reliably clamp the IGBT device, thereby improving the test accuracy of the terminal connection module 2 on the IGBT device 100, thereby better meeting the application requirements.

[0020] Furthermore, the present embodiment includes a frame 6, and the rotating loading platform 1, the terminal connection module 2 and the cooling box 3 are all fixed on the frame 6. In order to facilitate the movement of the position, the bottom of the frame 6 has casters 600.

[0021] In this embodiment, a rotary drive mechanism 10 for driving the rotary loading platform 1 to rotate is provided in the cooling box 3. At the same time, the water cooling mechanism 5 is also installed in the cooling box 3. In actual application, the water after the water cooling mechanism 5 cools the IGBT device 100 can directly fall back into the cooling box 3, and then the cooling water can be filtered and circulated to be transported back to the water intake end of the water cooling mechanism 5. By providing the cooling box 3, this embodiment can not only accommodate the water cooling mechanism 5 and the rotary drive mechanism 10, but also realize the functions of water supply and water storage.

[0022] As a preferred method, this embodiment also has an IGBT device pin test motherboard, see Figure 2 A lifting mechanism 7 is provided above the test station, a connecting mainboard 70 is provided at the lifting end of the lifting mechanism 7, a test probe 71 is provided at the bottom of the connecting mainboard 70, and the lifting mechanism 7 is used to drive the connecting mainboard 70 to descend so that the test probe 71 is electrically connected to the pins on the top of the IGBT device 100. Further, a gantry 60 is fixed on the frame 6, and the lifting mechanism 7 is fixed on the gantry 60.

[0023] In order to realize reliable lifting movement, in the present embodiment, the lifting mechanism 7 is a cylinder, a lifting plate 72 is fixed to the lifting end of the lifting mechanism 7 , and the connecting main board 70 is embedded on the lifting plate 72 .

[0024] In this embodiment, the device pressing mechanism 40 is used to press the IGBT device 100 on the fixture 4, see Figure 3 The rotating loading platform 1 is equipped with a device clamping mechanism 40 disposed on both sides of the fixture 4, and the device clamping mechanism 40 is used to clamp the IGBT device 100 onto the fixture 4. Based on the device clamping mechanism 40, it can ensure that the terminals of the IGBT device 100 are reliably connected to the terminals of the terminal connection module 2, and can also avoid cooling water leakage during water cooling.

[0025] For the preferred structure of the device pressing mechanism 40, see Figure 3 In this embodiment, the device clamping mechanism 40 includes a clamping arm support 41, a clamping arm 42 and a clamping arm driving 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 to the top of the fixture 4. The clamping arm driving cylinder 43 is used to drive the clamping arm 42 to swing downward to clamp the IGBT device 100.

[0026] To ensure stress balance on both sides, in this embodiment, two clamping arms 42 are hinged on the clamping arm support 41, a clamping arm connecting rod 44 is connected between the two clamping arms 42, and the moving end of the clamping arm driving cylinder 43 is transmission connected to the clamping arm connecting rod 44.

[0027] In this embodiment, a cylinder is preferably used to drive the two clamping arms 42 to move synchronously. Specifically, clamping cylinder fixing blocks 45 are fixed on the rotary loading platform 1 and are arranged on both sides of the clamping arm driving cylinder 43. A follower swivel 46 is rotatably connected between the two clamping cylinder fixing blocks 45. The bottom end of the clamping arm driving cylinder 43 is fixedly connected to the follower swivel 46. In practical applications, in order to avoid the clamping arm driving cylinder 43 from getting stuck during movement, a hinge relationship or a universal joint can be set at an appropriate connection to ensure that the clamping arm driving cylinder 43 can reliably drive the two clamping arms 42 to move synchronously.

[0028] This embodiment involves testing the crimping device with power on, see Figure 4 , Figure 5 and Figure 6 The crimping test bench 20 includes a crimping motion platform 21 that can be moved forward and backward. The crimping motion platform 21 is used to install a terminal connection module 2. The front side of the terminal connection module 2 is provided with an upper terminal 200 and a lower terminal 201. When the crimping motion platform 21 moves toward the IGBT device 100 to be tested, the terminal 101 of the IGBT device 100 enters between the upper terminal 200 and the lower terminal 201. The front side of the terminal connection module 2 is provided with an upper clamping rod 22 and a lower clamping rod 23. Rod 23, 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, and the crimping 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, and the terminal 101 of the IGBT device 100 is clamped between the upper terminal 200 and the lower terminal 201 by the clamping force applied by the upper clamping rod 22 and the lower clamping rod 23.

[0029] In the above structure, the IGBT device 100 to be tested is installed on a preset fixture. When the IGBT device 100 is located at the test station, the terminal 101 of the IGBT device 100 is aligned with the gap between the upper terminal 200 and the lower terminal 201. Then, the crimping motion platform 21 drives the terminal connection module 2 to move in translation, so that the terminal 101 of the IGBT device 100 enters 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 23 to move in translation. The clamping rod 23 moves relative to each other, and during the clamping force applied by the upper clamping rod 22 and the lower clamping rod 23, the terminal 101 of the IGBT device 100 is clamped between the upper terminal 200 and the lower terminal 201. Compared with the prior art, the upper terminal 200 and the lower terminal 201 of the present invention are simultaneously attached to the upper and lower sides of the terminal 101, so that the contact area between the IGBT device and the test module terminal is larger, which not only improves the connection reliability between the terminals, but also can withstand a larger current, and better meets the application requirements.

[0030] In this embodiment, the crimping test bench 20 adopts a forward and backward sliding translation mode. Specifically, the crimping test bench 20 is provided with two mutually parallel slide rails 24 , and the crimping motion platform 21 is slidably connected to the two slide rails 24 .

[0031] The translation drive mode of the crimping test bench 20 can be driven by a linear module or a linear cylinder. In this regard, the present embodiment preferably uses a cylinder to provide the translation drive force. Specifically, a front-to-back translation drive cylinder 25 is provided at the bottom of the crimping test bench 20. The telescopic rod of the front-to-back translation drive cylinder 25 is in transmission cooperation with the crimping motion platform 21, and the crimping motion platform 21 is driven to translate forward and backward by the front-to-back translation drive cylinder 25. In practical applications, in order to make the front-to-back translation drive cylinder 25 have sufficient driving stroke, the front-to-back translation drive cylinder 25 preferably uses a pen-shaped cylinder.

[0032] 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 to directly contact the terminal, and under the action of the soft rubber pad, scratches on the terminal surface can be avoided, and at the same time, they can also play an elastic buffering role.

[0033] 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 on the crimping motion platform 21 on both sides of the terminal connection module 2, and the two clamping rod driving cylinders 260 are respectively fixed to the rear ends of the two clamping rod supports 261. The bending parts of the two upper clamping rod swing arms 262 are respectively 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, and the bending 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, and the moving end of the clamping rod driving 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 hingedly matched with the rear end of the upper clamping rod swing arm 262, and the front end of the lower connecting rod 265 is hingedly matched with the rear end of the lower clamping rod swing arm 263.

[0034] In the above structure, when the clamp rod driving cylinder 260 moves forward, the rear end of the upper clamp rod swing arm 262 and the rear end of the lower clamp rod swing arm 263 are pushed forward by the upper connecting rod 264 and the lower connecting rod 265. Based on the rotational connection relationship between the bending part of the upper clamp rod swing arm 262 and the clamp rod support 261, the front end of the upper clamp rod swing arm 262 and the front end of the lower clamp rod swing arm 263 are driven to be relatively close, 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.

[0035] In this embodiment, the upper clamping rod swing arm 262 and the upper connecting rod 264 are preferably accommodated inside the clamping rod support 261. Specifically, the clamping rod support 261 is provided with an accommodation opening 266, and the upper clamping rod swing arm 262 and the upper connecting rod 264 are both arranged in the accommodation opening 266. Furthermore, the accommodation opening 266 extends to the front end of the clamping rod support 261.

[0036] This embodiment has a water cooling mechanism, see Figure 7 and Figure 8, which includes a rotating loading platform 1, on which a fixture 4 is provided, and the fixture 4 includes a hollow opening 400, the fixture 4 is used to load the IGBT device 100 to be tested, and the IGBT device 100 covers the hollow opening 400, and a void opening 102 is provided on the rotating loading platform 1, and the void opening 102 is aligned with the hollow opening 400 and is connected to each other, and a water supply platform 50 and a water supply driving mechanism 51 for driving the water supply platform 50 to move up and down are provided below the rotating loading platform 1, and the water supply platform 50 is aligned with the void opening 102. When the water supply driving 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 hollow opening 400, the void opening 102 and the top surface of the water supply platform 50, and 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 transports the fixture 4 loaded with the IGBT device 100 to be tested to the top of the water supply platform 50 by means of a rotating motion, so that the water supply platform 50 is aligned with the air avoidance opening 102, and then the water supply driving mechanism 51 drives the water supply platform 50 to rise, so that the water supply platform 50 contacts the edge of the air avoidance opening 102, at which time the bottom surface of the IGBT device 100, the hollow opening 400, the air avoidance opening 102 and the top surface of the water supply platform 50 are surrounded to form a water cooling cavity, which is formed by the water supply driving mechanism 51. The water supply port 53 on the top surface of the water platform 50 sprays water into the water cooling cavity. Since the water sprayed upward from the water supply port 53 is directly sprayed toward the bottom surface of the IGBT device 100, the cooling water is fully in contact with the bottom surface of the IGBT device 100, which greatly improves the cooling efficiency of the IGBT device 100. When the test is completed, the water supply drive mechanism 51 drives the water supply platform 50 to descend, and the water supply platform 50 is separated from the air avoidance port 102. At this time, the water in the water cooling cavity can be quickly discharged and drained, which can effectively improve work efficiency.

[0037] This embodiment has a rotary feeding cooling box, see Figures 8 to 11As shown, it includes a rotating loading platform 1, an upper box body 30 with an opening facing downward, and a lower box body 31 with an opening facing upward, the upper box body 30 and the lower box body 31 are both cylindrical boxes, the lower end of the upper box body 30 is inserted into the lower box body 31, and the upper box body 30 and the lower box body 31 are rotatably matched, the loading platform support 103 is fixedly installed in the lower box body 31, the loading platform support 103 is fixedly installed on the rotating drive mechanism 10, and the center of the upper box body 30 is aligned with the driving axis of the rotating drive mechanism 10. The rotating loading platform 1 is fixedly mounted on the top of the upper box body 30, and the jig 4 is fixedly mounted on the rotating loading platform 1. The loading platform support 103 is provided with a water cooling mechanism 5 for injecting water into the jig 4. The lower box body 31 is filled with cooling water. The water cooling mechanism 5 is used to extract cooling water from the lower box body 31 and inject it into the jig 4. The cooling water discharged from the jig 4 falls into the lower box body 31. The water level height in the lower box body 31 is greater than the bottom edge height of the upper box body 30.

[0038] In the above structure, the upper box body 30 is a structure with an opening facing downward, and the lower box body 31 is a structure with an opening facing upward. During installation, the lower box body 31 is fixed on the frame, the opening of the upper box body 30 is inverted and inserted into the lower box body 31, the upper box body 30 and the lower box body 31 maintain a rotatable relationship, and the loading platform support 103 is fixedly installed in the lower box body 31, the upper box body 30 is coaxially fixedly connected with the driving shaft of the rotating drive mechanism 10, and then the rotating loading platform 1 is fixedly installed on the top of the upper box body 30, and when the rotating drive mechanism 10 is working, the upper box body 30 and the rotating loading platform 1 can be driven The table 1 operates synchronously, and the water level of the cooling water stored in the lower box body 31 exceeds the boundary line between the upper box body 30 and the lower box body 31, so that the junction between the upper box body 30 and the lower box body 31 is sealed. In actual application, the water cooling mechanism 5 can directly draw cooling water into the lower box body 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 box body 31. Compared with the prior art, the present invention can integrate the cooling box under the loading platform, which not only realizes the rotation and transportation of the loading platform, but also has a better sealing effect. At the same time, it saves the space occupied by the equipment, makes the equipment smaller and more integrated.

[0039] In order to facilitate the lead-out of corresponding water pipes, air pipes, cables and other pipeline equipment, in this embodiment, an upwardly extending sleeve 310 is provided in the lower box body 31, and the vertical height of the sleeve 310 is greater than the water level in the lower box body 31, and the pipelines of the rotating drive mechanism 10 and the water cooling mechanism 5 pass through the sleeve 310.

[0040] In actual 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 regard, in the present embodiment, a through hole 105 is opened on the loading platform support 103, and the sleeve 310 passes through the through hole 105.

[0041] In order to enable the upper box body 30 to rotate relative to the lower box body 31 and to avoid position interference between the upper box body 30 and the lower box body 31 , in the present embodiment, a gap is provided between the upper box body 30 and the lower box body 31 .

[0042] As a preferred embodiment, a cooling circulation pipe 32 is provided in the lower box 31, and the cooling circulation pipe 32 is immersed in cooling water, and the cooling circulation pipe 32 is connected to a preset cold water circulation device. Furthermore, the cooling circulation pipe 32 is spirally coiled, and the cooling circulation pipe 32 is coiled at least twice. In this embodiment, the cooling circulation pipe 32 extends along the bottom edge of the lower box 31. In the above structure, the cooling circulation pipe 32 is connected to an external cold water circulation device, and the function of the cooling circulation pipe 32 is to assist in cooling the cooling water in the lower box 31, thereby ensuring the cooling effect of the cooling water.

[0043] On this basis, this embodiment also has a circulating water circuit structure, see Fig.11 and Fig.12 , which includes a frame 6, a cooling box 3 is provided on the frame 6, a rotating loading platform 1 is provided on the top of the cooling box 3, a fixture 4 is fixedly installed on the rotating loading platform 1, a water cooling mechanism 5 for injecting water into the fixture 4 is provided in the cooling box 3, the cooling water discharged from the fixture 4 falls back into the cooling box 3, a water intake pipe 61 is connected to the bottom of the cooling box 3, a cooling water pump 62 is provided on the frame 6, the lower end of the water intake pipe 61 is connected to the water inlet of the cooling water pump 62, and the water outlet of the cooling water pump 62 is connected to the water guide interface of the water cooling mechanism 5.

[0044] In the above structure, a water cooling mechanism 5 is provided in the cooling box 3, and a cooling water pump 62 is provided near the lower end of the frame 6. The cooling water pump 62 draws water from the cooling box 3 through the water intake pipe 61, and then transports water to the water guide interface of the water cooling mechanism 5, and then transports water to the fixture 4 by the water cooling mechanism 5, so as to cool down the IGBT device on the fixture 4. The cooling box 3, the water intake pipe 61, the cooling water pump 62 and the water cooling mechanism 5 form a cooling water circulation waterway, which can not only quickly discharge the cooling water in the fixture 4, thereby realizing rapid water return, but also simplify the cooling water circulation waterway, thereby better meeting the application requirements.

[0045] Regarding the preferred connection mode between the cooling water pump 62 and the water cooling mechanism 5, in this embodiment, the water outlet of the cooling water pump 62 is connected with a water supply pipe 63, and the upper end of the water supply pipe 63 passes through the bottom of the cooling box 3 and is connected to the water guide interface. Among them, the water supply pipe 63 is preferably a pipeline extending vertically upward, the water supply pipe 63 needs to pass through the bottom of the cooling box 3 and ensure that the connection between the two is sealed, and the upper end of the water supply pipe 63 is connected to the water guide interface of the water cooling mechanism 5, thereby forming a complete water supply circuit.

[0046] In this embodiment, the lower end of the water intake pipe 61 is connected to the water inlet of the cooling water pump 62 through a water return hose 64 .

[0047] Furthermore, the cooling water pump 62 is close to the lower end of the frame 6. Through the above structure, the cooling water in the cooling box 3 is transported to the water inlet end of the cooling water pump 62 through the water intake pipe 61. In this embodiment, the cooling water pump 62 is preferably arranged at a position close to the lower end of the frame 6. Under the action of gravity, the cooling water in the cooling box 3 is naturally loaded on the water inlet end of the cooling water pump 62, so that the cooling water pump 62 can fully take water.

[0048] In actual applications, in order to keep the cooling water delivered by the cooling water pump 62 clean, in this embodiment, a water filtering mechanism 65 is provided on the water intake pipe 61 .

[0049] The IGBT test equipment of this embodiment includes a dewatering air knife, see Fig.13 and Fig.14 , which comprises a rotating loading platform 1, a fixture 4 is arranged on the rotating loading platform 1, the fixture 4 comprises a hollow opening 400, an air avoidance opening 102 is opened on the rotating loading platform 1, the air avoidance opening 102 is aligned with the hollow opening 400 and is connected to each other, the IGBT device 100 to be tested is loaded on the fixture 4, a wind knife translation mechanism 83 is arranged below the rotating loading platform 1, a high-speed fan 80 is arranged at the moving end of the wind knife translation mechanism 83, and the top of the high-speed fan 80 A wind knife body 81 is provided, and a wind cavity is provided in the wind knife body 81, and the wind cavity is connected with the air outlet of the high-speed fan 80. A straight wind groove 82 is formed on the top of the wind knife body 81, and the straight wind groove 82 is aligned with the heat sink 104 densely distributed at the bottom of the IGBT device 100. When the wind knife translation mechanism 83 drives the high-speed fan 80 and the wind knife body 81 to translate, the water droplets in the heat sink 104 are removed by the airflow blown out by the straight wind groove 82.

[0050] In the above structure, the fixture 4 installed 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 hollow opening 400 and the air avoidance opening 102, and at the same time forms a water-cooling chamber with the water supply mechanism below the rotating loading platform 1. The IGBT device 100 is cooled by injecting water into the water-cooling chamber. After the test is completed and the drainage is completed, the rotating loading platform 1 rotates to align the air avoidance opening 102 and the hollow opening 400 with the wind knife body 81. At this time, the straight wind slot 82 is aligned with the IGB The heat sink 104 is densely distributed at the bottom of the IGBT device 100, and the wind knife translation mechanism 83 drives the high-speed fan 80 and the wind knife body 81 to translate along the length direction 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 wind knife body 81. The high-speed airflow forms a straight-line wind knife through the straight-line wind slot 82, and directly vertically toward the heat sink 104 densely distributed at the bottom of the IGBT device 100. Under the blowing of the straight-line high-speed airflow, the residual water at the bottom of the IGBT device 100 is quickly removed, so the water removal efficiency is higher.

[0051] In order to make the high-speed airflow sent out by the wind knife body 81 more concentrated, in the present embodiment, a wind collecting terminal 84 is provided on the top of the wind knife body 81 , and the straight wind slot 82 is provided at the top of the wind collecting terminal 84 .

[0052] Furthermore, the width of the wind collecting end 84 gradually decreases from bottom to top. The wind collecting end 84 is a structure that is narrow at the top and wide at the bottom. The wind knife body 81 is provided with a wind cavity. When the high-speed airflow in the wind cavity passes through the wind collecting end 84, the high-speed airflow is concentrated through the straight wind slot 82 and blows toward the bottom surface of the IGBT device 100 under the gathering effect of the wind collecting end 84. Then, in conjunction with the lateral movement of the wind knife translation mechanism 83, the straight wind knife sweeps across the bottom surface of the IGBT device 100, thereby efficiently removing the residual water on the bottom surface of the IGBT device 100.

[0053] Regarding the specific movement mode of the wind knife translation mechanism 83, in this embodiment, the wind knife translation mechanism 83 includes a transverse movement cylinder 830, and the movement end of the transverse movement cylinder 830 is provided with a vertical movement cylinder 831, and the high-speed fan 80 is fixed to the movement end of the vertical movement cylinder 831. In the above structure, under the cooperation of the transverse movement cylinder 830 and the vertical movement cylinder 831, the wind knife body 81 can be driven to translate to the bottom of the IGBT device 100, and then the vertical movement cylinder 831 drives the wind knife body 81 to rise and approach the bottom surface of the IGBT device 100. When sweeping the wind, the transverse movement cylinder 830 drives the wind knife body 81 to move transversely again, so that the straight-line wind knife quickly removes the residual water on the bottom surface of the IGBT device 100.

[0054] In order to install and fix the wind knife translation mechanism 83 , in the present embodiment, a loading platform support 103 is provided below the rotating loading platform 1 , and the lateral motion cylinder 830 is fixed to the side of the loading platform support 103 .

[0055] In this embodiment, a cooling box is provided below the rotating loading platform 1, and the loading platform support 103, the wind knife translation mechanism 83, the high-speed fan 80 and the wind knife body 81 are all provided in the cooling box. In the above structure, the high-speed fan 80 can directly suck air into the cooling box, and this structure can make the high-speed airflow circulate directly in the cooling box, thereby maintaining the balance inside and outside the box.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. An IGBT testing device, characterized in that: It includes a rotary loading platform, a terminal connection module, a cooling box, a loading station and a testing station. The rotary loading platform is arranged on the top of the cooling box, the terminal connection module is arranged adjacent to the testing station, the rotary loading platform is provided with two jigs symmetrically arranged relative to its center, the jigs are used to load IGBT devices, the rotary loading platform is used to drive the jig loaded with the IGBT device at the loading station to rotate to the testing station, and align the terminals of the IGBT device with the terminals of the terminal connection module, a clamping mechanism is provided adjacent to the terminal connection module, the clamping mechanism is used to clamp the terminals of the IGBT device with the terminals of the terminal connection module, a water cooling mechanism is provided in the cooling box, the water cooling mechanism is arranged adjacent to the testing station, and the water cooling mechanism is used to water-cool the IGBT device loaded on the jig.

2. The IGBT testing device according to claim 1, characterized in that: The utility model comprises a frame, and the rotary loading platform, the terminal connection module and the cooling box are all fixed on the frame.

3. The IGBT testing device according to claim 1, characterized in that: A rotating drive mechanism for driving the rotating loading platform to rotate is arranged in the cooling box.

4. The IGBT testing device according to claim 2, characterized in that: A lifting mechanism is provided above the test station, a connecting mainboard is provided at the lifting end of the lifting mechanism, a test probe is provided at the bottom of the connecting mainboard, and the lifting mechanism is used to drive the connecting mainboard to descend so that the test probe is electrically connected to the pin on the top of the IGBT device.

5. The IGBT testing device according to claim 4, characterized in that: A gantry is fixed on the frame, and the lifting mechanism is fixed on the gantry.

6. The IGBT testing device according to claim 4, characterized in that: The lifting movement mechanism is a cylinder, a lifting movement plate is fixed to the lifting movement end of the lifting movement mechanism, and the connecting main board is embedded in the lifting movement plate.

7. The IGBT testing device according to claim 1, characterized in that: The rotating loading platform is equipped with a device clamping mechanism which is arranged on both sides of the fixture, and the device clamping mechanism is used to clamp the IGBT device onto the fixture.

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

9. The IGBT testing device according to claim 8, characterized in that: Two clamping arms are hinged on the clamping arm support, a clamping arm connecting rod is connected between the two clamping arms, and the moving end of the clamping arm driving cylinder is transmission-connected to the clamping arm connecting rod.

10. The IGBT testing device according to claim 8, characterized in that: The rotating loading platform is fixed with clamping cylinder fixing blocks which are arranged on both sides of the clamping arm driving cylinder. A follower swivel seat is rotatably connected between the two clamping cylinder fixing blocks. The bottom end of the clamping arm driving cylinder is fixedly connected to the follower swivel seat.

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