Test apparatus for intelligent power modules

Abstract

This invention discloses a testing device for a smart power module. The testing device includes: a first test board; a second test board, the second test board having a mounting area on a second side away from the first test board in the thickness direction; and multiple external test connectors on the second side of the second test board, the external test connectors being adapted to output test results. The multiple external test connectors are circumferentially spaced outside the mounting area. The projections of the first and / or second adapters on the second side of the second test board are defined as adapter projections, and the adapter projections are radially spaced between the external test connectors and the mounting area. Therefore, by providing multiple external test connectors, which are electrically connected to the sockets, and by ensuring that the adapter projections are radially spaced between the external test connectors and the mounting area, the testing of the smart power module is not only more convenient and faster, but also avoids damage to the pins of the smart power module during the testing process.

Description

Technical Field

[0001] This invention relates to the field of semiconductor technology, and in particular to a testing device for a smart power module. Background Technology

[0002] In the power semiconductor industry, the performance of each new smart power module developed needs to be tested. To perform performance testing on smart power modules, corresponding testing equipment needs to be set up.

[0003] In related technologies, when testing intelligent power modules, the modules are usually soldered onto the test equipment. Installation and disassembly require a lot of time, and frequent disassembly and assembly can cause the solder pads to fall off and become unusable, thus failing to form an efficient and reliable testing method. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a testing apparatus for intelligent power modules that has higher testing efficiency.

[0005] A testing apparatus for a smart power module according to an embodiment of the present invention includes: a first test board, wherein a plurality of power input sockets are disposed on the first test board, the power input sockets being adapted to selectively connect to a power supply for operating the smart power module under test, and a plurality of first adapter sockets are also disposed on the first test board, the first adapter sockets being electrically connected to the power input sockets; a second test board, wherein a plurality of second adapter sockets are disposed on a first side of the second test board facing the first test board in the thickness direction of the second test board, the plurality of second adapter sockets being disposed opposite to the plurality of first adapter sockets one to one, one of the first adapter sockets and the second adapter sockets being a socket socket and the other being a pin socket, the socket socket and the pin socket being detachably plugged in and electrically connected; the thickness direction of the second test board is opposite to that of the first test board. The second side of the test board has an installation area suitable for mounting the intelligent power module to be tested. Multiple sockets are spaced circumferentially along the edge of the installation area. These sockets are electrically connected to the second adapter and are detachably connected to the pins of the intelligent power module to be tested. The second side of the second test board has multiple external test sockets electrically connected to the sockets and suitable for outputting test results. These external test sockets are spaced circumferentially outside the installation area. The projection of the first adapter and / or the second adapter onto the second side of the second test board is defined as the adapter projection. The adapter projections are radially spaced between the external test sockets and the installation area.

[0006] Therefore, by setting multiple external test sockets on the second side of the second test board, the external test sockets are electrically connected to the sockets, and the radial spacing of the adapter projection is set between the external test sockets and the installation area, the test device can not only make the testing of the intelligent power module more convenient and faster, but also avoid damaging the pins of the intelligent power module during the test, thereby improving the structural reliability of the intelligent power module.

[0007] In some examples of the present invention, the power input socket and the first adapter are both disposed on the same side of the thickness direction of the first test board, the projection of the second test board on the first test board is defined as the test board projection, and a plurality of power input sockets are disposed circumferentially at intervals on the outer side of the test board projection.

[0008] In some examples of the present invention, the test connector is a test pin socket, and at least one of the plurality of test pin sockets is selectively shorted by inserting a jumper cap.

[0009] In some examples of the present invention, the testing device for the intelligent power module further includes a rotating fastener, wherein the first test plate is provided with a first fixing hole, and the second test plate is provided with a second fixing hole. The first fixing hole and the second fixing hole correspond to each other and are adapted to correspond to the mounting holes on the intelligent power module to be tested. The rotating fastener is adapted to pass through the mounting holes, the second fixing holes and the first fixing holes on the intelligent power module to be tested in sequence, and to connect and fix the intelligent power module to be tested, the first test plate and the second test plate.

[0010] In some examples of the present invention, the first fixing hole and the second fixing hole are both threaded holes, the rotating fixing member includes a handle and a screw, the screw is adapted to pass through the mounting hole, the second fixing hole and the first fixing hole on the smart power module to be tested in sequence, and the handle is disposed at the end of the screw away from the first test board.

[0011] In some examples of the present invention, the second test board is provided with a claw spring welded to the edge of the mounting area, and the claw spring is provided with the insertion hole.

[0012] In some embodiments of the present invention, the plurality of power input sockets include a braking unit power input socket, a rectifier unit power input socket, and an inverter unit power input socket. The braking unit power input socket is adapted to selectively connect to power supplies for the operation of the braking unit of the intelligent power module under test; the rectifier unit power input socket is adapted to selectively connect to power supplies for the operation of the rectifier unit of the intelligent power module under test; and the inverter unit power input socket is adapted to selectively connect to power supplies for the operation of the inverter unit of the intelligent power module under test. The plurality of first adapter sockets include a braking unit... The system includes a first adapter socket for the rectifier unit, a first adapter socket for the inverter unit, and a first adapter socket for the braking unit. The first adapter socket for the braking unit is electrically connected to the power input socket for the braking unit. A second adapter socket for the braking unit is electrically connected to the power input socket for the rectifier unit, and a first adapter socket for the inverter unit is electrically connected to the power input socket for the inverter unit. Multiple second adapter sockets include a second adapter socket for the braking unit, a second adapter socket for the rectifier unit, and a second adapter socket for the inverter unit. The second adapter socket for the braking unit is detachably plugged into and electrically connected to the first adapter socket for the braking unit. The second adapter socket for the rectifier unit... The adapter is detachably plugged into and electrically connected to the first adapter of the rectifier unit, and the second adapter of the inverter unit is detachably plugged into and electrically connected to the first adapter of the inverter unit; the plurality of sockets include a brake unit socket, a rectifier unit socket, and an inverter unit socket, the brake unit socket being electrically connected to the second adapter of the brake unit, the rectifier unit socket being electrically connected to the second adapter of the rectifier unit, and the inverter unit socket being electrically connected to the second adapter of the inverter unit, the brake unit socket being adapted to be plugged into the brake unit pin of the intelligent power module under test. The connection includes a rectifier unit socket adapted to be electrically connected to the rectifier unit pin of the smart power module under test, and an inverter unit socket adapted to be electrically connected to the inverter unit pin of the smart power module under test. The plurality of external test sockets include a brake unit test socket, a rectifier unit test socket, and an inverter unit test socket. The brake unit test socket is adapted to be electrically connected to the brake unit socket, the rectifier unit test socket is adapted to be electrically connected to the rectifier unit socket, and the inverter unit test socket is adapted to be electrically connected to the inverter unit socket.

[0013] In some examples of the present invention, a plurality of brake unit test external connectors are located at a first end in a first direction of the second test board; the plurality of inverter unit test external connectors include a plurality of inverter unit upper bridge test external connectors and a plurality of inverter unit lower bridge test external connectors, the plurality of inverter unit lower bridge test external connectors are located at a first end in a first direction of the second test board and are spaced apart from the plurality of brake unit power input connectors in a second direction, a portion of the plurality of inverter unit upper bridge test external connectors are located at a second end in a first direction of the second test board, and another portion of the plurality of inverter unit upper bridge test external connectors are located at a third end in a second direction of the second test board; a portion of the plurality of rectifier unit test external connectors are located at a fourth end in a second direction of the second test board, and another portion of the plurality of rectifier unit test external connectors are located at a second end in a first direction of the second test board, wherein the first end and the second end of the second test board are arranged opposite each other in a first direction, and the third end and the fourth end of the second test board are arranged opposite each other in a second direction.

[0014] In some examples of the present invention, the rectifier unit test connector located at the second end of the second test board in the first direction is closer to the fourth end of the second test board in the second direction than the inverter unit bridge test connector.

[0015] In some examples of the present invention, compared to the brake unit test connector, a portion of the plurality of inverter unit lower bridge test connectors is closer to the third end of the second test board in the second direction, and another portion of the plurality of inverter unit lower bridge test connectors is located between two adjacent brake unit test connectors.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of a testing apparatus for an intelligent power module according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the first test board of the intelligent power module according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the second test board of the intelligent power module according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the second test board of the intelligent power module according to an embodiment of the present invention;

[0022] Figure 5 This is a circuit topology diagram of an intelligent power module according to an embodiment of the present invention.

[0023] Figure label:

[0024] 100. Testing equipment;

[0025] 10. First test board; 11. Power supply connector; 111. Braking unit power supply connector; 112. Rectifier unit power supply connector; 113. Inverter unit power supply connector;

[0026] 12. First adapter; 121. First adapter for braking unit; 122. First adapter for rectifier unit; 123. First adapter for inverter unit;

[0027] 13. First fixing hole;

[0028] 20. Second test board; 201. First end; 202. Second end; 203. Third end; 204. Fourth end;

[0029] 21. Second adapter; 211. Braking unit second adapter; 212. Rectifier unit second adapter; 213. Inverter unit second adapter; 22. Installation area;

[0030] 23. Socket; 231. Brake unit socket; 232. Rectifier unit socket; 233. Inverter unit socket;

[0031] 24. Test external connector; 241. Brake unit test external connector; 242. Rectifier unit test external connector; 243. Inverter unit test external connector; 2431. Inverter unit upper bridge test external connector; 2432. Inverter unit lower bridge test external connector;

[0032] 25. Second fixing hole; 26. Claw spring;

[0033] 30. Rotating fastener; 31. Handle;

[0034] 40. Shortening cap. Detailed Implementation

[0035] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0036] The following is for reference. Figures 1-5 A test apparatus 100 for a smart power module according to an embodiment of the present invention is described.

[0037] Combination Figures 1-4 As shown, the testing device 100 for the intelligent power module according to the present invention may mainly include: a first test board 10 and a second test board 20.

[0038] The first test board 10 is provided with multiple power input sockets 11, which are adapted to selectively connect to the power supply for the operation of the intelligent power module under test. The first test board 10 is also provided with multiple first adapter sockets 12, which are electrically connected to the power input sockets 11. The second test board 20 is provided with multiple second adapter sockets 21 on the first side of the thickness direction facing the first test board 10. The multiple second adapter sockets 21 are arranged opposite to the multiple first adapter sockets 12. One of the first adapter sockets 12 and the second adapter socket 21 is a socket 23 and the other is a pin socket. The socket 23 and the pin socket are detachably plugged in and electrically connected. The second side of the second test board 20 away from the first test board 10 in the thickness direction is provided with a mounting area 22, which is adapted to install the intelligent power module under test. Multiple sockets 23 are arranged circumferentially at intervals along the edge of the mounting area 22. The sockets 23 are electrically connected to the second adapter sockets 21 and are adapted to be detachably plugged in and electrically connected to the pins of the intelligent power module under test.

[0039] Specifically, when the testing device 100 is working, the first test board 10 and the second test board 20 need to be electrically connected, and then the intelligent power module needs to be electrically connected to the second test board 20. In this way, the first test board 10 can be connected to the power supply for the intelligent power module under test, providing basic support and services. The second test board 20 is used for gate input and voltage / current measurement, and the pins of the intelligent power module can be led out to the first test board 10 and the second test board 20, thereby realizing the power input and voltage / current measurement of the intelligent power module, ensuring the normal operation of the intelligent power module testing device 100.

[0040] By setting multiple first adapters 12 on the first test board 10 and multiple second adapters 21 on one side of the second test board 20 in the first direction, a detachable plug-in electrical connection between the first test board 10 and the second test board 20 can be achieved through the plug-in cooperation between the first adapters 12 and the second adapters 21. This not only ensures the stability of the electrical connection and improves the reliability of the test device 100, but also facilitates the removal, replacement and upgrading of the first test board 10 and the second test board 20.

[0041] In this design, one of the first adapter 12 and the second adapter 21 can be a socket socket, and the other can be a pin socket. It is understood that the socket socket has multiple sockets, and the pin socket has multiple pins. Thus, simply inserting the pins into the sockets allows for the connection and engagement between the first adapter 12 and the second adapter 21. This not only improves speed and accuracy, increasing the assembly efficiency of the testing device 100, but also enhances stability and reliability, thus improving the overall reliability of the testing device 100.

[0042] Furthermore, by providing an installation area 22 on the second side of the second test board 20 away from the first test board 10 in the thickness direction, and by providing multiple sockets 23 spaced circumferentially around the edge of the installation area 22, with the sockets 23 electrically connected to the second adapter 21, the intelligent power module to be tested can be placed in the installation area 22, and the pins of the intelligent power module to be tested can be detachably plugged into the sockets 23 for electrical connection. This enables the installation of the intelligent power module to be tested on the test device 100, and allows for detachable electrical connection of the intelligent power module on the second test board 20 and even the test device 100. This reduces the inconvenience caused by soldering and disassembly, facilitates the installation and replacement of the intelligent power module, and improves the convenience of testing.

[0043] Furthermore, a plurality of external test sockets 24 are provided on the second side of the second test board 20. The external test sockets 24 are electrically connected to the sockets 23 and are suitable for outputting test results. The plurality of external test sockets 24 are circumferentially spaced on the outer side of the mounting area 22. The projection of the first adapter 12 and / or the second adapter 21 on the second side of the second test board 20 is set as the adapter projection. The adapter projections are radially spaced between the external test sockets 24 and the mounting area 22.

[0044] Specifically, after testing the parameters of the intelligent power module, the testing device 100 needs to output the test results through an output device. By setting multiple external test sockets 24 on the second side of the second test board 20, and electrically connecting the external test sockets 24 to the sockets 23, it is only necessary to electrically connect the output device to the external test sockets 24, without connecting the output device to the pins of the intelligent power module. This achieves the electrical connection between the testing device 100 and the output device, allowing the output of test results. This not only makes testing the intelligent power module more convenient and faster, but also prevents damage to the pins of the intelligent power module during the test, thus improving the structural reliability of the intelligent power module.

[0045] Furthermore, multiple test connectors 24 are arranged circumferentially on the outer side of the mounting area 22. The projections of the first adapter 12 and the second adapter 21 on the second side of the second test plate 20 are set as adapter projections. The adapter projections are radially spaced between the test connectors 24 and the mounting area 22. This optimizes the relative positions of the first adapter 12, the second adapter 21, the test connectors 24, and the mounting area 22, placing the mounting area 22 on the inner side and the test connectors 24 on the outer side. This facilitates the installation of the intelligent power module on the test device 100 and the electrical connection between the output device and the test connectors 24, thereby avoiding misconnection problems and improving the reliability of the test device 100.

[0046] Therefore, by providing multiple external test sockets 24 on the second side of the second test board 20, with the external test sockets 24 electrically connected to the sockets 23, and the adapters being radially spaced between the external test sockets 24 and the mounting area 22, the test device 100 can not only test the intelligent power module more conveniently and quickly, but also avoid damaging the pins of the intelligent power module during the test, thereby improving the structural reliability of the intelligent power module.

[0047] Combination Figures 1-4 As shown, the power input socket 11 and the first adapter 12 are both located on the same side of the thickness direction of the first test board 10. The projection of the second test board 20 on the first test board 10 is set as the test board projection. Multiple power input sockets 11 are arranged circumferentially at intervals on the outer side of the test board projection.

[0048] Specifically, the power input socket 11 and the first adapter socket 12 can both be set on the same side of the thickness direction of the first test plate 10. When assembling the test device 100, this side of the first test plate 10 is set facing the second test external socket 24, and the first adapter socket 12 and the second adapter socket 21 are plugged into and electrically connected.

[0049] Furthermore, the projection of the second test board 20 onto the first test board 10 is set as the test board projection, and multiple power access sockets 11 are arranged circumferentially on the outer side of the test board projection. That is, after the first test board 10 and the second test board 20 are connected, the second test board 20 does not cover the power access sockets 11 in the thickness direction, which facilitates the positioning of the power access sockets 11 and the connection of the power access sockets 11 to the power supply, making the power connection of the test device 100 more convenient and reliable.

[0050] Combination Figure 1 and Figure 3 As shown, the external test connector 24 is a test pin socket, and at least one of the multiple test pin sockets is selectively shorted by inserting a jumper cap 40.

[0051] Specifically, when testing the parameters of the inverter unit of the intelligent power module, to avoid misleading other inverter chips, the gates and emitters of the other inverter chips need to be short-circuited by soldering to ensure that they are in the off state.

[0052] Unlike existing technologies that use soldering for short-circuiting, which requires frequent wire bonding and results in complex testing equipment, low testing efficiency, and potential damage to the IGBT module due to direct high-temperature contact between the module and the soldering iron, this application uses a test connector 24 as a test pin socket. By connecting the shorting cap 40 to the test connector 24, the test circuit can be built. Furthermore, simply switching the connection of the shorting cap 40 to different test connectors 24 allows for switching between tests of different inverter chips in the inverter unit. This not only makes testing more convenient and faster, improving testing efficiency, but also ensures the structural reliability of the intelligent power module.

[0053] Combination Figures 1-4 As shown, the testing device 100 for the intelligent power module may further include a rotating fixing member 30. The first test plate 10 is provided with a first fixing hole 13, and the second test plate 20 is provided with a second fixing hole 25. The first fixing hole 13 and the second fixing hole 25 correspond to each other and are adapted to correspond to the mounting holes on the intelligent power module to be tested. The rotating fixing member 30 is adapted to pass through the mounting holes, the second fixing holes 25 and the first fixing holes 13 on the intelligent power module to be tested in sequence, and to connect and fix the intelligent power module to be tested, the first test plate 10 and the second test plate 20.

[0054] Thus, when the intelligent power module to be tested is placed on the test device 100, and the pins of the intelligent power module are inserted into the corresponding sockets 23 to test the parameters of the intelligent power module, the mounting holes on the intelligent power module, the second fixing holes 25 on the second test board 20, and the first fixing holes 13 on the first test board 10 can be aligned. Then, the rotating fixing member 30 is sequentially passed through the mounting holes, the second fixing holes 25, and the first fixing holes 13 and tightened. This can connect and fix the intelligent power module to be tested, the second test board 20, and the first test board 10, thereby improving the stability of the intelligent power module installed on the test device 100 and ensuring the reliable progress of the test process.

[0055] Furthermore, both the first fixing hole 13 and the second fixing hole 25 are threaded holes. The rotating fixing member 30 may mainly include a handle part 31 and a screw part. The screw part is adapted to pass through the mounting hole, the second fixing hole 25 and the first fixing hole 13 on the intelligent power module to be tested in sequence. The handle part 31 is located at the end of the screw part away from the first test plate 10.

[0056] Specifically, by making both the first fixing hole 13 and the second fixing hole 25 threaded holes, the rotating fixing member 30 can mainly include a handle part 31 and a screw part that are interconnected. In this way, when the intelligent power module to be tested is set on the testing device 100, the operator can operate the handle part 31 to make the screw part pass through the mounting hole, and rotate the rotating fixing member 30 so that the screw part is threadedly connected to the second fixing hole 25 and the first fixing hole 13 in sequence. This allows the intelligent power module to be tested to be detachably fixed on the testing device 100. This not only makes the fixing of the intelligent power module to be tested on the testing device 100 simpler and more reliable, but also facilitates the disassembly of the intelligent power module to be tested on the testing device 100, thereby facilitating the switching of tests for different intelligent power modules.

[0057] Combination Figure 1 and Figure 4 As shown, a claw spring 26 is welded to the edge of the mounting area 22 corresponding to the second test board 20, and an insertion hole 23 is provided inside the claw spring 26.

[0058] Specifically, a claw spring 26 can be welded to the edge of the mounting area 22 corresponding to the second test board 20. The claw spring 26 has a socket 23. It is understood that the claw spring 26 has good elasticity and conductivity. When the intelligent power module is placed in the mounting area 22, the pins of the intelligent power module can be inserted into the socket 23 of the claw spring 26. The claw spring and the pin are elastically matched, and the claw spring 26 can tightly clamp the pin, thereby improving the stability and reliability of the electrical connection between the pins of the intelligent power module and the test device 100.

[0059] Furthermore, the claw spring 26 is reusable and can be adapted to multiple testing operations of the testing device 100. It can be inserted and removed multiple times without being easily damaged, thereby effectively improving the working efficiency and reliability of the testing device 100.

[0060] Combination Figures 2-4 As shown, the multiple power input sockets 11 may include a braking unit power input socket 111, a rectifier unit power input socket 112, and an inverter unit power input socket 113. Specifically, the braking unit power input socket 111 is adapted to selectively connect to power supplies for the operation of the braking unit of the intelligent power module under test; the rectifier unit power input socket 112 is adapted to selectively connect to power supplies for the operation of the rectifier unit of the intelligent power module under test; and the inverter unit power input socket 113 is adapted to selectively connect to power supplies for the operation of the inverter unit of the intelligent power module under test.

[0061] The multiple first adapters 12 may include a braking unit first adapter 121, a rectifier unit first adapter 122, and an inverter unit first adapter 123. The braking unit first adapter 121 is electrically connected to the braking unit power input 111, the braking unit second adapter 211 is electrically connected to the rectifier unit power input 112, and the inverter unit first adapter 123 is electrically connected to the inverter unit power input 113. Optionally, some braking unit first adapters 121 and some inverter unit first adapters 123 may be integrated.

[0062] The plurality of second adapters 21 may include a second adapter 211 for a braking unit, a second adapter 212 for a rectifier unit, and a second adapter 213 for an inverter unit. Specifically, the second adapter 211 for the braking unit is detachably plugged into and electrically connected to the first adapter 121 for the braking unit; the second adapter 212 for the rectifier unit is detachably plugged into and electrically connected to the first adapter 122 for the rectifier unit; and the second adapter 213 for the inverter unit and the first adapter 123 for the inverter unit are detachably plugged into and electrically connected.

[0063] The multiple sockets 23 may include a brake unit socket 231, a rectifier unit socket 232, and an inverter unit socket 233. Specifically, the brake unit socket 231 is electrically connected to the second adapter 211 of the brake unit, the rectifier unit socket 232 is electrically connected to the second adapter 212 of the rectifier unit, and the inverter unit socket 233 is electrically connected to the second adapter 213 of the inverter unit. The brake unit socket 231 is adapted to be electrically connected to the brake unit pin of the intelligent power module under test, the rectifier unit socket 232 is adapted to be electrically connected to the rectifier unit pin of the intelligent power module under test, and the inverter unit socket 233 is adapted to be electrically connected to the inverter unit pin of the intelligent power module under test.

[0064] The multiple external test connectors 24 may include a brake unit test connector 241, a rectifier unit test connector 242, and an inverter unit test connector 243. Specifically, the brake unit test connector 241 is adapted to be electrically connected to the brake unit socket 231, the rectifier unit test connector 242 is adapted to be electrically connected to the rectifier unit socket 232, and the inverter unit test connector 243 is adapted to be electrically connected to the inverter unit socket 233.

[0065] The test device 100 can be assembled through the sequential electrical connection between the brake unit power input socket 111, the brake unit first adapter socket 121, the brake unit second adapter socket 211, the brake unit socket 231, and the brake unit test external socket 241; and through the sequential electrical connection between the rectifier unit power input socket 112, the rectifier unit first adapter socket 122, the rectifier unit second adapter socket 212, the rectifier unit socket 232, and the intelligent power module test external socket 24; and through the sequential electrical connection between the inverter unit power input socket 113, the inverter unit first adapter socket 123, the inverter unit second adapter socket 213, the inverter unit socket 233, and the inverter unit test external socket 243.

[0066] Thus, when setting the intelligent power module to be tested on the test device 100, it is only necessary to electrically connect the inverter unit of the intelligent power module to the inverter unit socket 233, the rectifier unit of the intelligent power module to the rectifier unit socket 232, and the inverter unit of the intelligent power module to the inverter unit socket 233. This will enable the accurate setting of each unit of the intelligent power module to be tested on the test device 100, facilitating the test device 100 to test and output the parameters of each unit of the intelligent power module.

[0067] Combination Figure 3 As shown, the multiple inverter unit test external sockets 243 may include multiple inverter unit upper bridge test external sockets 2431 and multiple inverter unit lower bridge test external sockets 2432. Specifically, the inverter unit includes six inverter chips, which may include upper bridge inverter chips and lower bridge inverter chips. There are three upper bridge inverter chips and three lower bridge inverter chips. The three upper bridge inverter chips and the three lower bridge inverter chips correspond one-to-one. One upper bridge inverter chip and one lower bridge inverter chip are connected in series to form an inverter group. The three inverter groups are connected in parallel. The three inverter groups correspond to the U phase, V phase, and W phase, respectively.

[0068] By including multiple inverter unit test external sockets 243, multiple inverter unit upper bridge test external sockets 2431 and multiple inverter unit lower bridge test external sockets 2432 can be made to output test data of the upper bridge inverter chip, and the inverter unit lower bridge test external socket 2432 can output test data of the lower bridge inverter chip.

[0069] Combination Figure 3As shown, multiple brake unit test connectors 241 are located at the first end 201 of the second test board 20 in the first direction. Multiple inverter unit lower bridge test connectors 2432 are located at the first end 201 of the second test board 20 in the first direction and are spaced apart from multiple brake unit power input connectors 111 in the second direction. A portion of the multiple inverter unit upper bridge test connectors 2431 are located at the second end 202 of the second test board 20 in the first direction, and another portion of the multiple inverter unit upper bridge test connectors 2431 are located at the third end 203 of the second test board 20 in the second direction. A portion of the multiple rectifier unit test connectors 242 are located at the fourth end 204 of the second test board 20 in the second direction, and another portion of the multiple rectifier unit test connectors 242 are located at the second end 202 of the second test board 20 in the first direction. The first end 201 and the second end 202 of the second test board 20 are arranged opposite each other in the first direction, and the third end 203 and the fourth end 204 of the second test board 20 are arranged opposite each other in the second direction.

[0070] In this way, the layout of multiple brake unit test connectors 241, multiple inverter unit lower bridge test connectors 2432, multiple inverter unit upper bridge test connectors 2431, and multiple rectifier unit test connectors 242 on the second test board 20 can be more uniform and reasonable, so that the multiple test connectors 24 can be adapted to the layout of the brake unit, inverter unit, and rectifier unit inside the intelligent power module, thereby facilitating the setting of the intelligent power module to be tested on the test device 100.

[0071] Combination Figure 3 As shown, compared to the inverter unit bridge test external connector 2431, the rectifier unit test external connector 242 located at the second end 202 in the first direction of the second test board 20 is closer to the fourth end 204 of the second test board 20 in the second direction. This allows for a more rational layout of the multiple inverter unit bridge test external connectors 2431 and multiple rectifier unit test external connectors 242 located at the second end 202 in the first direction of the second test board 20, making it compatible with the layout of the inverter and rectifier units inside the intelligent power module.

[0072] Combination Figure 3 As shown, compared to the brake unit test connector 241, a portion of the multiple inverter unit lower bridge test connectors 2432 are closer to the third end 203 of the second test board 20 in the second direction, while another portion of the multiple inverter unit lower bridge test connectors 2432 is located between two adjacent brake unit test connectors 241. This allows for a more rational layout of the multiple inverter unit lower bridge test connectors 2432 and the multiple brake unit test connectors 241 located at the second end 202 of the second test board 20 in the first direction, making it compatible with the layout of the inverter units and brake units within the intelligent power module.

[0073] Combination Figures 1-5 As shown, taking the inverter chip of the intelligent power module as an IGBT (Insulated-Gate Bipolar Transistor), the test device 100 tests the on-state voltage drop of the IGBT4 of the intelligent power module as an example. Specifically, the sockets 23 and external test connectors 24 can be numbered on the first test board 10 and the second test board 20 to correspond to the pin numbers inside the intelligent power module.

[0074] First, short-circuit the test connectors 24 labeled 15 and 17, 6 and 7, 13 and 17, 8 and 9, and 12 and 14 using shorting caps 40. That is, short-circuit the gates and emitters of the remaining five non-test IGBTs.

[0075] Then, the power input terminals 11 labeled 18 and 5 on the first test board 10 are electrically connected to an external power source via banana plugs to achieve power input for the IGBT under test.

[0076] Then, test connectors 24 labeled 4 and 5 on the second test board 20 are connected to the gate of the IGBT4, and the output device is connected to test connectors 24 labeled 18 and 5.

[0077] In this way, the test circuit can be built, and the test can be completed with normal input current.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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.

[0079] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0080] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A testing device for an intelligent power module, characterized in that, include: The first test board (10) is provided with a plurality of power access sockets (11), which are adapted to selectively connect to the power supply for the operation of the intelligent power module to be tested. The first test board (10) is also provided with a plurality of first adapter sockets (12), which are electrically connected to the power access sockets (11). The second test plate (20) has a plurality of second adapters (21) arranged on the first side of the second test plate (10) in the thickness direction. The plurality of second adapters (21) are arranged opposite to the plurality of first adapters (12). One of the first adapters (12) and the second adapters (21) is a socket and the other is a pin. The socket and the pin are detachably plugged into electrical connection. The second test board (20) has a mounting area (22) on the second side away from the first test board (10) in the thickness direction. The mounting area (22) is suitable for mounting the smart power module to be tested. The edge of the mounting area (22) is circumferentially spaced with a plurality of sockets (23). The sockets (23) are electrically connected to the second adapter (21). The sockets (23) are suitable for detachably plugging into the pins of the smart power module to be tested. The second side of the second test board (20) is provided with a plurality of test external sockets (24), the test external sockets (24) are electrically connected to the socket (23), the test external sockets (24) are adapted to output test results, the plurality of test external sockets (24) are arranged circumferentially at intervals on the outer side of the mounting area (22), the projection of the first adapter (12) and / or the second adapter (21) on the second side of the second test board (20) is set as the adapter projection, the adapter projection is radially spaced between the test external sockets (24) and the mounting area (22).

2. The testing apparatus for the intelligent power module according to claim 1, characterized in that, The power input socket (11) and the first adapter (12) are both located on the same side of the thickness direction of the first test board (10). The projection of the second test board (20) on the first test board (10) is set as the test board projection. Multiple power input sockets (11) are arranged circumferentially on the outer side of the test board projection.

3. The testing apparatus for the intelligent power module according to claim 1, characterized in that, The test connector (24) is a test pin socket, and at least one of the plurality of test pin sockets is selectively shorted by inserting a jumper cap (40).

4. The testing apparatus for the intelligent power module according to claim 1, characterized in that, It also includes a rotating fastener (30), on which the first test plate (10) is provided with a first fixing hole (13) and on the second test plate (20) is provided with a second fixing hole (25). The first fixing hole (13) and the second fixing hole (25) correspond to each other and are adapted to correspond to the mounting holes on the smart power module to be tested. The rotating fastener (30) is adapted to pass through the mounting holes, the second fixing hole (25) and the first fixing hole (13) on the smart power module to be tested in sequence, and to connect and fix the smart power module to be tested, the first test plate (10) and the second test plate (20).

5. The testing apparatus for the intelligent power module according to claim 4, characterized in that, The first fixing hole (13) and the second fixing hole (25) are both threaded holes. The rotating fixing member (30) includes a handle (31) and a screw. The screw is adapted to pass through the mounting hole, the second fixing hole (25) and the first fixing hole (13) on the smart power module to be tested in sequence. The handle (31) is located at the end of the screw away from the first test plate (10).

6. The testing apparatus for the intelligent power module according to claim 1, characterized in that, The second test plate (20) is provided with a claw spring (26) welded to the edge of the installation area (22), and the claw spring (26) is provided with the insertion hole (23).

7. The testing apparatus for the intelligent power module according to claim 1, characterized in that, The plurality of power input sockets (11) include a braking unit power input socket (111), a rectifier unit power input socket (112), and an inverter unit power input socket (113). The braking unit power input socket (111) is adapted to selectively connect to the power supply for the operation of the braking unit of the intelligent power module under test. The rectifier unit power input socket (112) is adapted to selectively connect to the power supply for the operation of the rectifier unit of the intelligent power module under test. The inverter unit power input socket (113) is adapted to selectively connect to the power supply for the operation of the inverter unit of the intelligent power module under test. The plurality of first adapters (12) include a first adapter (121) for a braking unit, a first adapter (122) for a rectifier unit, and a first adapter (123) for an inverter unit. The first adapter (121) for the braking unit is electrically connected to the power input socket (111) for the braking unit. The first adapter (123) for the inverter unit is electrically connected to the power input socket (112) for the rectifier unit. The first adapter (123) for the inverter unit is electrically connected to the power input socket (113) for the inverter unit. The plurality of second adapters (21) include a second adapter for a braking unit (211), a second adapter for a rectifier unit (212), and a second adapter for an inverter unit (213). The second adapter for the braking unit (211) is detachably plugged into the first adapter for the braking unit (121), the second adapter for the rectifier unit (212) is detachably plugged into the first adapter for the rectifier unit (122), and the second adapter for the inverter unit (213) and the first adapter for the inverter unit (123) are detachably plugged into the first adapter for the inverter unit (123). The plurality of sockets (23) include a brake unit socket (231), a rectifier unit socket (232), and an inverter unit socket (233). The brake unit socket (231) is electrically connected to the second adapter of the brake unit (211), the rectifier unit socket (232) is electrically connected to the second adapter of the rectifier unit (212), and the inverter unit socket (233) is electrically connected to the second adapter of the inverter unit (213). The brake unit socket (231) is adapted to be plugged into and electrically connected to the brake unit pin of the smart power module to be tested. The rectifier unit socket (232) is adapted to be plugged into and electrically connected to the rectifier unit pin of the smart power module to be tested. The inverter unit socket (233) is adapted to be plugged into and electrically connected to the inverter unit pin of the smart power module to be tested. The plurality of test connectors (24) include a brake unit test connector (241), a rectifier unit test connector (242), and an inverter unit test connector (243). The brake unit test connector (241) is adapted to be electrically connected to the brake unit socket (231), the rectifier unit test connector (242) is adapted to be electrically connected to the rectifier unit socket (232), and the inverter unit test connector (243) is adapted to be electrically connected to the inverter unit socket (233).

8. The testing apparatus for the intelligent power module according to claim 7, characterized in that, Multiple brake unit test connectors (241) are located at the first end (201) in the first direction of the second test plate (20); The plurality of inverter unit test external connectors (243) include a plurality of inverter unit upper bridge test external connectors (2431) and a plurality of inverter unit lower bridge test external connectors (2432). The plurality of inverter unit lower bridge test external connectors (2432) are located at the first end (201) of the second test board (20) in the first direction and are spaced apart from the plurality of brake unit power input connectors (111) in the second direction. A portion of the plurality of inverter unit upper bridge test external connectors (2431) is located at the second end (202) of the second test board (20) in the first direction, and another portion of the plurality of inverter unit upper bridge test external connectors (2431) is located at the third end (203) of the second test board (20) in the second direction. A portion of the plurality of rectifier unit test connectors (242) is located at the fourth end (204) of the second test board (20) in the second direction, and another portion of the plurality of rectifier unit test connectors (242) is located at the second end (202) of the second test board (20) in the first direction. The first end (201) and the second end (202) of the second test board (20) are arranged opposite to each other in the first direction, and the third end (203) and the fourth end (204) of the second test board (20) are arranged opposite to each other in the second direction.

9. The testing apparatus for the intelligent power module according to claim 8, characterized in that, Compared to the inverter unit bridge test connector (2431), the rectifier unit test connector (242) located at the second end (202) of the second test board (20) in the first direction is closer to the fourth end (204) of the second test board (20) in the second direction.

10. The testing apparatus for the intelligent power module according to claim 9, characterized in that, Compared to the brake unit test connector (241), a portion of the plurality of inverter unit lower bridge test connectors (2432) is closer to the third end (203) of the second test plate (20) in the second direction, and another portion of the plurality of inverter unit lower bridge test connectors (2432) is located between two adjacent brake unit test connectors (241).

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