Testing device of intelligent power module

Abstract

The invention discloses a test device of an intelligent power module. The test device of the intelligent power module comprises a first test board; and when the dynamic parameters of the power side of the to-be-tested intelligent power module are tested by the second test board, an external tester is electrically connected with pins of the to-be-tested intelligent power module in a contact manner, so that the to-be-tested intelligent power module outputs a dynamic parameter test result. Therefore, the first test board and the second test board are arranged to jointly form the test device, the intelligent power module to be tested is installed in the installation area, and the pins of the intelligent power module to be tested are electrically connected with the external pin seats correspondingly, so that dynamic and control parameter test can be realized, and the test efficiency is improved. The stability of the testing process and the accuracy of the testing result can be guaranteed, in addition, the testing efficiency can be improved, and the reliability of the testing device is improved.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor technology, and in particular to a testing device for an intelligent power module. Background Art

[0002] With the development of semiconductor chip technology and packaging technology, intelligent power modules are becoming more and more widely used. Electrical performance testing is one of the most important test items for intelligent power modules. It can detect whether the intelligent power modules meet the predetermined performance standards, or can help locate and analyze the causes of failures of intelligent power modules.

[0003] Under the existing technology, a test device can only realize the withstand voltage performance and leakage test of the intelligent power module, and the parameter test of the intelligent power module is not comprehensive. Even if some test devices can test the dynamics of the power side of the intelligent power module and the control parameters of the drive side, manual operation is usually required to build the test circuit through frequent line replacement and welding. The manual wiring method is complicated and prone to errors, which affect the test results. At the same time, the test circuit is also increased by welding wires and wire connections. The test results are not reliable. The intelligent power module is easily damaged due to high temperature during welding, and an efficient and reliable testing method cannot be formed. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a testing device for an intelligent power module.

[0005] The testing device of the intelligent power module of the vehicle according to the present invention comprises: a first test board, the first test board having a first side and a second side along the thickness direction thereof, the first side of the first test board being provided with a mounting area, the mounting area being suitable for mounting the intelligent power module to be tested; the first side of the first test board being provided with a drive side high-end signal input pin external needle holder and a drive side low-end signal input pin external needle holder located outside the mounting area, the drive side high-end signal input pin external needle holder being suitable for being electrically connected to the drive side high-end signal input pin of the intelligent power module to be tested, the drive side low-end signal input pin external needle holder being suitable for being electrically connected to the drive side high-end signal input pin of the intelligent power module to be tested, and the drive side low-end signal input pin external needle holder being suitable for being electrically connected to the drive side high-end signal input pin of the intelligent power module to be tested. The pin external pin holder is suitable for being electrically connected to the low-end signal input pin of the driving side of the intelligent power module to be tested; the first side of the first test board is provided with a high-end power device driving floating power supply voltage pin external pin holder and a high-end power device driving floating power supply ground pin external pin holder located outside the installation area, the high-end power device driving floating power supply voltage pin external pin holder is suitable for being electrically connected to the high-end power device driving floating power supply voltage pin of the intelligent power module to be tested, and the high-end power device driving floating power supply ground pin external pin holder is suitable for being electrically connected to the high-end power device driving floating power supply voltage pin of the intelligent power module to be tested The ground pin is electrically connected; the first side of the first test board is provided with a low-side gate drive power supply voltage pin external needle holder and a high-side gate drive power supply voltage pin external needle holder located outside the installation area, the low-side gate drive power supply voltage pin external needle holder is suitable for being electrically connected to the low-side gate drive power supply voltage pin of the intelligent power module to be tested, and the high-side gate drive power supply voltage pin external needle holder is suitable for being electrically connected to the high-side gate drive power supply voltage pin of the intelligent power module to be tested; the first side of the first test board is provided with a power side pin external needle holder located outside the installation area, the power side pin external needle holder Suitable for being electrically connected to the power side pin of the intelligent power module to be tested, when testing the control parameters of the driving side of the intelligent power module to be tested, the power side pin external needle holder supplies power to the power side of the intelligent power module to be tested, and the driving side high-end signal input pin external needle holder, the driving side low-end signal input pin external needle holder, the high-end power device driving suspension power supply voltage pin external needle holder, the high-end power device driving suspension power supply ground pin external needle holder, the low-side gate driving power supply voltage pin external needle holder and the high-side gate driving power supply voltage pin external needle holder output test results;The second test board is provided with a drive side pin external socket, a power side pin external socket, a dual pulse signal input pin external socket and an electrolytic capacitor external socket, the drive side pin external socket is suitable for being electrically connected to the drive side pin of the intelligent power module to be tested, the power side pin external socket is suitable for being electrically connected to the power side pin of the intelligent power module to be tested, the dual pulse signal input pin external socket is suitable for being electrically connected to the dual pulse signal input pin of the intelligent power module to be tested, the electrolytic capacitor external socket is electrically connected to the power side pin external socket, and the electrolytic capacitor external socket is suitable for being electrically connected to the power side pin external socket. When testing the dynamic parameters of the power side of the intelligent power module to be tested, the drive side pin external socket supplies power to the drive side of the intelligent power module to be tested, the power side pin external socket supplies power to the power side of the intelligent power module to be tested, the dual pulse signal input pin external socket provides a pulse signal to the intelligent power module to be tested, the electrolytic capacitor external socket is externally connected to an electrolytic capacitor to provide energy for the test, and the external tester is electrically connected to the pin of the intelligent power module to be tested, so that the intelligent power module to be tested outputs the dynamic parameter test results.

[0006] Therefore, a test device is formed by setting up a first test board and a second test board, and the intelligent power module to be tested is installed in the installation area, and the pins of the intelligent power module to be tested are electrically connected to the corresponding external pin holders. This not only can realize the testing of dynamic and control parameters, but also can ensure the stability of the test process and the accuracy of the test results. In addition, it can also improve the test efficiency and the reliability of the test device.

[0007] In some examples of the present invention, the drive side pin external socket and the dual pulse signal input pin external socket together constitute an integral first external socket, and the power side pin external socket constitutes an integral second external socket.

[0008] In some examples of the present invention, a first adapter and / or a second adapter is provided on the second side of the first test board; the first adapter is suitable for being electrically connected to the power side pin of the intelligent power module to be tested, one of the first adapter and the first external adapter is provided with a first needle body and the other is provided with a first pin hole, and the first pin hole is plugged into and matched with the first needle body to achieve electrical connection; the second adapter is electrically connected to the drive side pin and the dual pulse signal input pin of the intelligent power module to be tested, one of the second adapter and the second external adapter is provided with a second needle body and the other is provided with a second pin hole, and the second pin hole is plugged into and matched with the second needle body to achieve electrical connection.

[0009] In some examples of the present invention, the projection of the first adapter and the first external adapter on the first side of the first test board is set as a first projection portion, and the projection of the second adapter and the second external adapter on the first side of the first test board is set as a second projection portion, and the first projection portion and the second projection portion are respectively spaced apart on both sides of the first direction of the installation area.

[0010] In some examples of the present invention, the external needle holder for the high-end signal input pin on the driving side, the external needle holder for the low-end signal input pin on the driving side, the external needle holder for the high-end power device driving floating power supply voltage pin, the external needle holder for the high-end power device driving floating power supply ground pin, the external needle holder for the low-side gate driving power supply voltage pin and the external needle holder for the high-side gate driving power supply voltage pin together constitute an integrally formed external needle holder assembly, and the external needle holder assembly is spaced apart on the side of the first projection portion in the first direction away from the installation area, and the power side pin external needle holders are spaced apart on the side of the second direction of the installation area.

[0011] In some examples of the present invention, the drive side pin external socket includes a drive side power input pin external socket and an analog ground pin external socket, the drive side power input pin external socket is suitable for being electrically connected to the drive side power input pin of the intelligent power module to be tested, and the analog ground pin external socket is suitable for being electrically connected to the analog ground pin of the intelligent power module to be tested; the dual pulse signal input pin external socket includes a drive side high-end signal input pin external socket and a drive side low-end signal input pin external socket, the drive side high-end signal input pin external socket is suitable for being electrically connected to the drive side high-end signal of the intelligent power module to be tested. The input pins are electrically connected, and the driving side low-end signal input pin external socket is suitable for being electrically connected to the driving side low-end signal input pin of the intelligent power module to be tested; the power side pin external socket includes a power side output pin external socket, a DC positive pin external socket and a DC negative pin external socket, the power side output pin external socket is suitable for being electrically connected to the power side output pin of the intelligent power module to be tested, the DC positive pin external socket is suitable for being electrically connected to the DC positive pin of the intelligent power module to be tested, and the DC negative pin external socket is suitable for being electrically connected to the DC negative pin of the intelligent power module to be tested.

[0012] In some examples of the present invention, the test device of the intelligent power module also includes a drive side power input socket and a simulated ground socket, the drive side power input socket and the simulated ground socket are suitable for plugging and electrically connecting with the drive side power supply, the drive side power input socket is electrically connected to the drive side power input pin external socket, and the simulated ground socket is connected to the simulated ground pin external socket; it also includes a drive side high-end signal input pin external socket and a drive side low-end signal input pin external socket, the drive side high-end signal input pin external socket and the drive side low-end signal input pin external socket are suitable for plugging and electrically connecting with a signal generator, and the drive side high-end signal input pin is electrically connected to the drive side power supply. The pin external socket is electrically connected to the driving side high-end signal input pin external socket, and the driving side low-end signal input pin external socket is electrically connected to the driving side low-end signal input pin external socket; the testing device of the intelligent power module also includes a power side output pin external socket, a DC positive pin external socket and a DC negative pin external socket, the power side output pin external socket, the DC positive pin external socket and the DC negative pin external socket are all suitable for plugging and electrically connecting with the power side power supply, and the power side output pin external socket, the DC positive pin external socket and the DC negative pin external socket are all electrically connected to the power side pin external socket;

[0013] In some examples of the present invention, the driving side power input socket, the analog ground socket, the power side output pin external socket, the DC positive pin external socket and the DC negative pin external socket are all suitable for plugging with an external banana plug; the driving side high-end signal input pin external socket and the driving side low-end signal input pin external socket both include a metal grounding protection ring and a metal plug-in portion, the metal grounding protection ring is arranged around the outside of the metal plug-in portion, and the metal plug-in portion is a plug hole or a plug connector; a third pinhole is provided on one of the electrolytic capacitor external socket and the electrolytic capacitor, and a third pin body is provided on the other, and the third pinhole and the third pin body are plugged together to achieve electrical connection.

[0014] In some examples of the present invention, there are multiple power side output pin external sockets, and the multiple power side output pin external sockets are suitable for one-to-one electrical connection with multiple power side output pins of the intelligent power module to be tested; there are multiple drive side high-end signal input pin external sockets, and the multiple drive side high-end signal input pin external sockets are suitable for one-to-one electrical connection with multiple drive side high-end signal input pins of the intelligent power module to be tested; there are multiple drive side low-end signal input pin external sockets, and the multiple drive side low-end signal input pin external sockets are suitable for one-to-one electrical connection with multiple drive side low-end signal input pins of the intelligent power module to be tested.

[0015] In some examples of the present invention, the multiple power side output pin external sockets include a U-phase power side output pin external socket, a V-phase power side output pin external socket and a W-phase power side output pin external socket; the multiple drive side high-end signal input pin external sockets include a U-phase drive side high-end signal input pin external socket, a V-phase drive side high-end signal input pin external socket and a W-phase drive side high-end signal input pin external socket; the multiple drive side low-end signal input pin external sockets include a drive side low-end signal input pin external socket, a V-phase drive side low-end signal input pin external socket and a W-phase drive side low-end signal input pin external socket.

[0016] In some examples of the present invention, the installation area of ​​the first test board is provided with a plug-in structure, and the plug-in structure is suitable for being electrically connected to the driving side high-end signal input pin, the driving side low-end signal input pin, the high-end power device driving suspension power supply voltage pin, the high-end power device driving suspension power supply ground pin, the low-side gate driving power supply voltage pin, the high-side gate driving power supply voltage pin, the driving side power supply input pin, the analog ground pin, the power side output pin, the DC positive terminal pin and the DC negative terminal pin of the intelligent power module to be tested; and / or the installation area is electrically connected by welding with the driving side high-end signal input pin, the driving side low-end signal input pin, the high-end power device driving suspension power supply voltage pin, the high-end power device driving suspension power supply ground pin, the low-side gate driving power supply voltage pin, the high-side gate driving power supply voltage pin, the driving side power supply input pin, the analog ground pin, the power side output pin, the DC positive terminal pin and the DC negative terminal pin on the intelligent power module to be tested.

[0017] In some examples of the present invention, each of the power side pin external needle holder, the driving side high-end signal input pin external needle holder, the driving side low-end signal input pin external needle holder, the high-end power device drive floating power supply voltage pin external needle holder, the high-end power device drive floating power supply ground pin external needle holder, the low-side gate drive power supply voltage pin external needle holder and the high-side gate drive power supply voltage pin external needle holder includes at least one needle body group, and each of the needle body groups includes a first needle body portion and a second needle body portion arranged at intervals, the first needle body portion is suitable for being electrically connected to the corresponding pin of the intelligent power module to be tested, and the second needle body portion is suitable for being electrically connected to the external terminal; wherein, the first needle body portion and the second needle body portion of the same needle body group) can be selectively electrically connected.

[0018] In some examples of the present invention, the first needle body portion and the second needle body portion of the same needle body group are electrically connected via a shorting cap.

[0019] In some examples of the present invention, the power side pin external needle holder includes a power side output pin external needle holder, a DC positive pin external needle holder and a DC negative pin external needle holder arranged in sequence in a first direction, the power side output pin external needle holder is suitable for being electrically connected to the power side output pin of the intelligent power module to be tested, the DC positive pin external needle holder is suitable for being electrically connected to the DC positive pin of the intelligent power module to be tested, and the DC negative pin external needle holder is suitable for being electrically connected to the DC negative pin of the intelligent power module to be tested.

[0020] In some examples of the present invention, the first test board is provided with a power side pin external terminal, a pulse width modulation signal external terminal, a high-end power device drive floating power supply voltage external terminal, a high-end power device drive floating power supply ground external terminal, and a power supply voltage external terminal; the power side pin external terminal is electrically connected to the second pin body portion of the power side pin external pin seat; the pulse width modulation signal external terminal is electrically connected to the second pin body portion of the driving side high-end signal input pin external pin seat and the driving side low-end signal input pin external pin seat respectively; the high-end power device drive floating power supply voltage external terminal is electrically connected to the second pin body portion of the high-end power device drive floating power supply voltage pin external pin seat, and the high-end power device drive floating power supply ground external terminal is electrically connected to the second pin body portion of the high-end power device drive floating power supply ground pin external pin seat; the power supply voltage external terminal is electrically connected to the second pin body portion of the low-side gate drive power supply voltage pin external pin seat and the second pin body portion of the high-side gate drive power supply voltage pin external pin seat respectively.

[0021] In some examples of the present invention, the power side pin external terminal includes a power side output pin external terminal, a DC positive pin external terminal and a DC negative pin external terminal, the power side output pin external terminal is electrically connected to the second pin body portion of the power side output pin external needle holder, the DC positive pin external terminal is electrically connected to the second pin body portion of the DC positive pin external needle holder, and the DC negative pin external terminal is electrically connected to the second pin body portion of the DC negative pin external needle holder.

[0022] In some examples of the present invention, each of the power side pin external terminal, the pulse width modulation signal external terminal, the high-end power device drive floating power supply voltage external terminal, the high-end power device drive floating power ground external terminal and the power supply voltage external terminal includes a base and a connecting ring, the base is arranged on the first test board, the connecting ring is arranged on the base and is suitable for being electrically connected to the second needle body portion of the corresponding needle seat, and the connecting ring is a metal connecting ring and is electrically connected to an external power supply or a tester.

[0023] In some examples of the present invention, there are multiple external needle holders for high-end signal input pins on the driving side, and the multiple external needle holders for high-end signal input pins on the driving side are suitable for being electrically connected one-to-one with the multiple high-end signal input pins on the driving side of the intelligent power module to be tested; there are multiple external needle holders for low-end signal input pins on the driving side, and the multiple external needle holders for low-end signal input pins on the driving side are suitable for being electrically connected one-to-one with the multiple low-end signal input pins on the driving side of the intelligent power module to be tested; there are multiple external needle holders for high-end power device drive suspension power supply voltage pins, and the multiple external needle holders for high-end power device drive suspension power supply voltage pins are suitable for being electrically connected one-to-one with the multiple high-end power device drive suspension power supply voltage pins of the intelligent power module to be tested; the external needle holder for the high-end power device drive suspension power supply ground pin is There are multiple external pin sockets for high-end power device driving suspended power supply ground pins, which are suitable for one-to-one electrical connection with multiple high-end power device driving suspended power supply ground pins of the intelligent power modules to be tested; there are multiple external pin sockets for power side pins, which are suitable for one-to-one electrical connection with multiple power side pins of the intelligent power modules to be tested; there is one external pin socket for low-side gate drive power supply voltage pins, which is suitable for electrical connection with multiple low-side gate drive power supply voltage pins of the intelligent power modules to be tested; there is one external pin socket for high-side gate drive power supply voltage pins, which is suitable for electrical connection with multiple high-side gate drive power supply voltage pins of the intelligent power modules to be tested.

[0024] In some examples of the present invention, the plurality of external needle holders for high-end signal input pins on the driving side include a U-phase driving side high-end signal input pin external needle holder, a V-phase driving side high-end signal input pin external needle holder, and a W-phase driving side high-end signal input pin external needle holder; the plurality of external needle holders for low-end signal input pins on the driving side include a U-phase driving side low-end signal input pin external needle holder, a V-phase driving side low-end signal input pin external needle holder, and a W-phase driving side low-end signal input pin external needle holder; the plurality of external needle holders for high-end power device driving floating supply voltage pins include a U-phase high-end power device driving floating supply The power supply voltage pin external needle holder, the V-phase high-end power device driving floating power supply voltage pin external needle holder and the W-phase high-end power device driving floating power supply voltage pin external needle holder; the multiple high-end power device driving floating power supply ground pin external needle holders include the U-phase high-end power device driving floating power supply ground pin external needle holder, the V-phase high-end power device driving floating power supply ground pin external needle holder and the W-phase high-end power device driving floating power supply ground pin external needle holder; the multiple power side output pin external needle holders include the U-phase power side pin external needle holder, the V-phase power side pin external needle holder and the W-phase power side pin external needle holder.

[0025] In some examples of the present invention, a fault output needle socket, a pull-up resistor needle socket and a fault output external terminal are provided on the first test board, the fault output needle socket is electrically connected to the fault output pin of the intelligent power module to be tested, the pull-up resistor needle socket is electrically connected to the fault output external terminal, and the fault output needle socket and the pull-up resistor needle socket are electrically connected via a short-circuit cap.

[0026] In some examples of the present invention, the fault output external terminal includes a base and a connecting ring, the base is arranged on the first test board, the connecting ring is arranged on the base and is suitable for being electrically connected to the pull-up resistor pin seat, and the connecting ring is a metal connecting ring and is electrically connected to an external power supply or a tester.

[0027] In some examples of the present invention, an overcurrent protection terminal socket and a first drive side ground pin external socket are provided on the first side of the first test board, the overcurrent protection terminal socket is suitable for being electrically connected to the short-circuit voltage sampling pin of the intelligent power module to be tested, the first drive side ground pin external socket is suitable for being electrically connected to the drive side ground pin of the intelligent power module to be tested, and the overcurrent protection terminal socket and the first drive side ground pin external socket are electrically connected via a short-circuit cap.

[0028] In some examples of the present invention, a power side ground pin external needle holder and a second drive side ground pin external needle holder are provided on one side of the first test board, the power side ground pin external needle holder is suitable for being electrically connected to the power side ground pin of the intelligent power module to be tested, the second drive side ground pin external needle holder is suitable for being electrically connected to the drive side ground pin of the intelligent power module to be tested, and the power side ground pin external needle holder and the second drive side ground pin external needle holder are electrically connected via a short-circuit cap.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 is a front view of a first test board according to an embodiment of the present invention;

[0032] Figure 2 is a front view of a second test board according to an embodiment of the present invention;

[0033] Figure 3 is a rear view of a first test board according to an embodiment of the present invention;

[0034] Figure 4 is a schematic diagram of a needle assembly according to an embodiment of the present invention.

[0035] Reference numerals:

[0036] 100. Testing device;

[0037] 10. First test board; 11. Installation area; 12. External pin holder for power side pin; 121. External pin holder for power side output pin; 122. External pin holder for DC positive pin; 123. External pin holder for DC negative pin; 13. External pin holder for high-end signal input pin on driving side; 14. External pin holder for low-end signal input pin on driving side; 15. External pin holder for high-end power device driving suspension power supply voltage pin; 16. External pin holder for high-end power device driving suspension power ground pin; 17. External pin holder for low-side gate driving power supply voltage pin; 18. External pin holder for high-side gate driving power supply voltage pin;

[0038] 19. External terminal for power side pin; 191. External terminal for power side output pin; 192. External terminal for DC positive pin; 193. External terminal for DC negative pin; 20. External terminal for pulse width modulation signal; 21. External terminal for high-end power device driving suspension power supply voltage; 22. External terminal for high-end power device driving suspension power supply ground; 23. Pull-up resistor pin holder; 24. External terminal for power supply voltage; 25. Fault output pin holder; 26. Fault output external terminal; 29. ​​Overcurrent protection terminal pin holder; 30. External pin holder for first driving side ground pin; 31. External pin holder for power side ground pin; 32. External pin holder for second driving side ground pin; 33. First adapter; 34. Second adapter; 35. Base; 36. Connecting ring; 38. External pin holder assembly;

[0039] 40. Second test board; 41. Drive side pin external socket; 411. Drive side power input pin external socket; 412. Analog ground pin external socket; 413. Drive side power input socket; 414. Analog ground socket; 42. Power side pin external socket; 421. Power side output pin external socket; 422. DC positive pin external socket; 423. DC negative pin external socket; 424. Power side output pin external socket; 425. DC positive pin external socket; 426. DC negative pin external socket; 43. Double pulse signal input pin external socket; 431. Drive side high-end signal input pin external socket; 432. Drive side low-end signal input pin external socket; 433. Drive side high-end signal input pin external socket; 434. Drive side low-end signal input pin external socket; 44. Electrolytic capacitor external socket; 45. First external socket; 46. Second external socket;

[0040] 50. needle body assembly; 51. first needle body portion; 52. second needle body portion. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0042] Reference below Figure 1-Figure 4 The test device 100 for an intelligent power module according to an embodiment of the present invention is described. The test device 100 for an intelligent power module can be used to test corresponding parameters of the intelligent power module.

[0043] Combination Figure 1-Figure 4As shown, the test device 100 of the intelligent power module according to the present invention may mainly include: a first test board 10 and a second test board 40, wherein the first test board 10 has a first side and a second side along its thickness direction, the first side of the first test board 10 is provided with a mounting area 11, and the mounting area 11 is suitable for mounting the intelligent power module to be tested; the first side of the first test board 10 is provided with a drive side high-end signal input pin external needle seat 13 and a drive side low-end signal input pin external needle seat 14 located outside the mounting area 11, and the drive side high-end signal input pin external needle seat 13 is suitable for connecting with the drive side high-end signal input pin of the intelligent power module to be tested. The first side of the first test board 10 is provided with a high-end power device driving suspension power supply voltage pin external needle holder 15 and a high-end power device driving suspension power supply ground pin external needle holder 16 located outside the mounting area 11, and the high-end power device driving suspension power supply voltage pin external needle holder 15 is suitable for being electrically connected to the high-end power device driving suspension power supply voltage pin of the intelligent power module to be tested, and the high-end power device driving suspension power supply ground pin external needle holder 16 is suitable for being electrically connected to the high-end power device driving suspension power supply voltage pin of the intelligent power module to be tested. The high-end power device drives the suspended power supply ground pin to be electrically connected; the first side of the first test board 10 is provided with a low-side gate drive power supply voltage pin external needle seat 17 and a high-side gate drive power supply voltage pin external needle seat 18 located outside the installation area 11, the low-side gate drive power supply voltage pin external needle seat 17 is suitable for being electrically connected to the low-side gate drive power supply voltage pin of the intelligent power module to be tested, and the high-side gate drive power supply voltage pin external needle seat 18 is suitable for being electrically connected to the high-side gate drive power supply voltage pin of the intelligent power module to be tested; the first side of the first test board 10 is provided with a power side pin external needle seat 12 located outside the installation area 11, The rate side pin external needle holder 12 is suitable for being electrically connected to the power side pin of the intelligent power module to be tested. When the control parameters of the driving side of the intelligent power module to be tested are tested, the power side pin external needle holder 12 supplies power to the power side of the intelligent power module to be tested, and the driving side high-end signal input pin external needle holder 13, the driving side low-end signal input pin external needle holder 14, the high-end power device driving floating power supply voltage pin external needle holder 15, the high-end power device driving floating power supply ground pin external needle holder 16, the low-side gate driving power supply voltage pin external needle holder 17 and the high-side gate driving power supply voltage pin external needle holder 18 output the test results.

[0044] The second test board 40 is provided with a drive side pin external socket 41, a power side pin external socket 42, a double pulse signal input pin external socket 43 and an electrolytic capacitor external socket 44. The drive side pin external socket 41 is suitable for being electrically connected to the drive side pin of the intelligent power module to be tested, the power side pin external socket 42 is suitable for being electrically connected to the power side pin of the intelligent power module to be tested, the double pulse signal input pin external socket 43 is suitable for being electrically connected to the double pulse signal input pin of the intelligent power module to be tested, the electrolytic capacitor external socket 44 is electrically connected to the power side pin external socket 42, and the electrolytic capacitor external socket 44 is electrically connected to the power side pin external socket 42. Suitable for external electrolytic capacitors; when testing the dynamic parameters of the power side of the intelligent power module to be tested, the drive side pin external socket 41 supplies power to the drive side of the intelligent power module to be tested, the power side pin external socket 42 supplies power to the power side of the intelligent power module to be tested, the dual pulse signal input pin external socket 43 provides a pulse signal to the intelligent power module to be tested, the electrolytic capacitor external socket 44 is externally connected to an electrolytic capacitor to provide energy for the test, and the external tester is electrically connected to the pin contacts of the intelligent power module to be tested so that the intelligent power module to be tested outputs the dynamic parameter test results.

[0045] In this way, by combining the first test board 10 and the second test board 40 to form a test device 100 for an intelligent power module, the control parameters of the driving side and the dynamic parameters of the power side of the intelligent power module to be tested can be tested. This can not only improve the accuracy and stability of the test device 100 in testing the control parameters of the driving side and the dynamic parameters of the power side of the intelligent power module to be tested, but also simplify the structural design of the test device 100.

[0046] Since the corresponding external sockets for supplying power to the driving side and the power side of the intelligent power module and ensuring the normal operation of the intelligent power module are all on the second test board 40, the voltage of the driving side power supply is relatively large, which can easily cause the driving side pin external socket 41 to be damaged and exploded. In this way, even if the driving side pin external socket 41 is damaged and exploded, it will not cause damage to the first test board 10. This can ensure the independence of the first test board 10 and the second test board 40 when testing the dynamic parameters of the power side of the intelligent power module, thereby improving the structural reliability of the test device 100.

[0047] In addition, when testing the dynamic parameters of the power side of the intelligent power module, the external tester is electrically connected to the corresponding pins of the intelligent power module by direct contact, so that the corresponding pins output the test results. This can keep the output test results away from the second test board 40, reduce stray inductance during testing, and thus improve the accuracy and stability of the test results.

[0048] Therefore, by setting up the first test board 10 and the second test board 40 to jointly form a test device 100, and installing the intelligent power module to be tested in the installation area 11, the pins of the intelligent power module to be tested are electrically connected to the corresponding external pin holders. This can not only realize the testing of dynamic and control parameters, but also ensure the stability of the test process and the accuracy of the test results. In addition, it can also improve the test efficiency and improve the reliability of the test device 100.

[0049] Combination Figure 2 As shown, the drive side pin external socket 41 and the dual pulse signal input pin external socket 43 together constitute an integral first external socket 45, and the power side pin external socket 42 constitutes an integral second external socket 46. Such an arrangement not only makes the structural arrangement on the second test board 40 more compact, but also facilitates the electrical connection between the drive side pin external socket 41, the dual pulse signal input pin external socket 43 and the power side pin external socket 42 and the intelligent power module.

[0050] Combination Figure 3 As shown, the second side of the first test board 10 is provided with a first adapter seat 33 and / or a second adapter seat 34; the first adapter seat 33 is suitable for being electrically connected to the power side pin of the intelligent power module to be tested, one of the first adapter seat 33 and the first external seat 45 is provided with a first needle body and the other is provided with a first pinhole, and the first pinhole is plugged into and matched with the first needle body to achieve electrical connection; the second adapter seat 34 is electrically connected to the drive side pin and the dual pulse signal input pin of the intelligent power module to be tested, one of the second adapter seat 34 and the second external seat 46 is provided with a second needle body and the other is provided with a second pinhole, and the second pinhole is plugged into and matched with the second needle body to achieve electrical connection.

[0051] Specifically, by setting the first adapter seat 33 and the second adapter seat 34 on the second side of the first test board 10, and setting one of the first adapter seat 33 and the first external seat 45 with a first needle body and the other with a first pinhole, the first pinhole is plugged into the first needle body to achieve electrical connection, and one of the second adapter seat 34 and the second external seat 46 is provided with a second needle body and the other with a second pinhole, the second pinhole is plugged into the second needle body to achieve electrical connection. This can not only facilitate the electrical connection between the first adapter seat 33 and the first external seat 45, but also facilitate the electrical connection between the second adapter seat 34 and the second external seat 46.

[0052] Combination Figure 3As shown, the projections of the first adapter seat 33 and the first external seat 45 on the first side of the first test board 10 are set as the first projection portion, and the projections of the second adapter seat 34 and the second external seat 46 on the first side of the first test board 10 are set as the second projection portion, and the first projection portion and the second projection portion are respectively spaced apart on both sides of the first direction of the installation area 11.

[0053] By such arrangement, the projections of the first adapter seat 33 and the first external seat 45 on the first side of the first test board 10 can be the first projection portion, and the projections of the second adapter seat 34 and the second external seat 46 on the first side of the first test board 10 can be the second projection portion. The first projection portion and the second projection portion are respectively arranged at intervals on both sides of the first direction of the installation area 11. In this way, the structural layout of the first test board 10 and the second test board 40 can be optimized, thereby optimizing the structural design of the test device 100.

[0054] Combination Figure 1 and Figure 2 As shown, the external needle holder 13 of the high-end signal input pin of the driving side, the external needle holder 14 of the low-end signal input pin of the driving side, the external needle holder 15 of the high-end power device driving floating power supply voltage pin, the external needle holder 16 of the high-end power device driving floating power supply ground pin, the external needle holder 17 of the low-side gate driving power supply voltage pin and the external needle holder 18 of the high-side gate driving power supply voltage pin together constitute an integrally formed external needle holder assembly 38, and the external needle holder assembly 38 is arranged at intervals on the side of the first projection portion in the first direction away from the installation area 11, and the power side pin external needle holder 12 is arranged at intervals on the side of the installation area 11 in the second direction. Specifically, by spacing the external needle seat assembly 38 on the side of the first projection portion in the first direction away from the installation area 11, and spacing the power side pin external needle seat 12 on the side of the installation area 11 in the second direction, not only can the electrical connection between the first adapter 33 and the intelligent power module affect the electrical connection between the external needle seat assembly 38 and the intelligent power module, but also the electrical connection between the power side pin external needle seat 12 and the intelligent power module will not be affected by the electrical connection between other needle seats and the intelligent power module, so that the structural design of the test device 100 can be further optimized.

[0055] Combination Figure 2As shown, the drive side pin external socket 41 includes a drive side power input pin external socket 411 and an analog ground pin external socket 412, the drive side power input pin external socket 411 is suitable for being electrically connected to the drive side power input pin of the intelligent power module to be tested, and the analog ground pin external socket 412 is suitable for being electrically connected to the analog ground pin of the intelligent power module to be tested; the double pulse signal input pin external socket 43 includes a drive side high-end signal input pin external socket 431 and a drive side low-end signal input pin external socket 432, the drive side high-end signal input pin external socket 431 is suitable for being electrically connected to the drive side high-end signal input pin of the intelligent power module to be tested. The power side pin external socket 42 includes a power side output pin external socket 421, a DC positive pin external socket 422 and a DC negative pin external socket 423. The power side output pin external socket 421 is suitable for being electrically connected to the power side output pin of the intelligent power module to be tested, the DC positive pin external socket 422 is suitable for being electrically connected to the DC positive pin of the intelligent power module to be tested, and the DC negative pin external socket 423 is suitable for being electrically connected to the DC negative pin of the intelligent power module to be tested.

[0056] Combination Figure 2 As shown, the test device 100 of the intelligent power module also includes a drive side power input socket 413 and a simulated ground socket 414, the drive side power input socket 413 and the simulated ground socket 414 are suitable for plugging and electrically connecting with the drive side power supply, the drive side power input socket 413 is electrically connected to the drive side power input pin external socket 411, and the simulated ground socket 414 is connected to the simulated ground pin external socket 412; it also includes a drive side high-end signal input pin external socket 433 and a drive side low-end signal input pin external socket 434, the drive side high-end signal input pin external socket 433 and the drive side low-end signal input pin external socket 434 are suitable for plugging and electrically connecting with the signal generator, and the drive side high-end signal input pin external socket 433 is electrically connected to the driving side high-end signal input pin external socket 431, and the driving side low-end signal input pin external socket 434 is electrically connected to the driving side low-end signal input pin external socket 432; the test device 100 of the intelligent power module also includes a power side output pin external socket 424, a DC positive pin external socket 425 and a DC negative pin external socket 426, the power side output pin external socket 424, the DC positive pin external socket 425 and the DC negative pin external socket 426 are all suitable for plugging and electrically connecting with the power side power supply, and the power side output pin external socket 424, the DC positive pin external socket 425 and the DC negative pin external socket 426 are all electrically connected to the power side pin external socket 42;

[0057] Combination Figure 2As shown, the drive side power input socket 413, the analog ground socket 414, the power side output pin external socket 424, the DC positive pin external socket 425 and the DC negative pin external socket 426 are all suitable for mating with external banana plugs. Specifically, by arranging the driving side power input socket 413, the analog ground socket 414, the power side output pin external socket 424, the DC positive pin external socket 425 and the DC negative pin external socket 426 into a shape suitable for plugging and matching with an external banana head, not only can the stability and reliability of the plugging and matching of the driving side power input socket 413, the analog ground socket 414, the power side output pin external socket 424, the DC positive pin external socket 425 and the DC negative pin external socket 426 with an external banana head be improved, but also the difficulty of plugging and matching of the driving side power input socket 413, the analog ground socket 414, the power side output pin external socket 424, the DC positive pin external socket 425 and the DC negative pin external socket 426 with an external banana head can be reduced.

[0058] Furthermore, the drive side high-end signal input pin external socket 433 and the drive side low-end signal input pin external socket 434 both include a metal grounding protection ring and a metal plug-in portion, wherein the metal grounding protection ring is disposed around the outside of the metal plug-in portion, and the metal plug-in portion is a plug hole or a plug connector. Specifically, by surrounding the metal grounding protection ring on the outside of the metal plug-in portion, the metal grounding protection ring can protect the plug-in electrical connection between the metal plug-in portion and the external dual pulse signal generator, thereby making the electrical connection between the metal plug-in portion and the external dual pulse signal generator more stable and reliable.

[0059] Combination Figure 2 As shown, a third pinhole is provided on one of the electrolytic capacitor external socket 44 and the electrolytic capacitor, and a third pin body is provided on the other, and the third pinhole and the third pin body are plugged together to achieve electrical connection. Specifically, by providing a third pinhole on one of the electrolytic capacitor external socket 44 and the electrolytic capacitor, and a third pin body on the other, and plugging together the third pinhole and the third pin body to achieve electrical connection, not only can the stability and reliability of the electrical connection between the electrolytic capacitor external socket 44 and the electrolytic capacitor be further improved, but also the difficulty of the electrical connection between the electrolytic capacitor external socket 44 and the electrolytic capacitor can be reduced.

[0060] Combination Figure 2As shown, there are multiple power-side output pin external sockets 421, and the multiple power-side output pin external sockets 421 are suitable for one-to-one electrical connection with multiple power-side output pins of the intelligent power module to be tested; there are multiple drive-side high-end signal input pin external sockets 431, and the multiple drive-side high-end signal input pin external sockets 431 are suitable for one-to-one electrical connection with multiple drive-side high-end signal input pins of the intelligent power module to be tested; there are multiple drive-side low-end signal input pin external sockets 432, and the multiple drive-side low-end signal input pin external sockets 432 are suitable for one-to-one electrical connection with multiple drive-side low-end signal input pins of the intelligent power module to be tested.

[0061] This arrangement can not only improve the compatibility and versatility of the test device 100, so that the test device 100 can adapt to different intelligent power modules, but also make each pin external socket have a certain scalability. Specifically, an additional connection interface can be provided to facilitate connection with an external circuit or device, so that the test device 100 can be upgraded or the function expanded to a certain extent.

[0062] Furthermore, when a fault occurs in the test system, the module or line where the fault occurs can be quickly located by detecting the connection status and signal transmission of multiple external pin sockets respectively.

[0063] Combination Figure 2 As shown, multiple power side output pin external sockets 421 include a U-phase power side output pin external socket, a V-phase power side output pin external socket and a W-phase power side output pin external socket; multiple drive side high-end signal input pin external sockets 431 include a U-phase drive side high-end signal input pin external socket, a V-phase drive side high-end signal input pin external socket and a W-phase drive side high-end signal input pin external socket; multiple drive side low-end signal input pin external sockets include a drive side low-end signal input pin external socket, a V-phase drive side low-end signal input pin external socket and a W-phase drive side low-end signal input pin external socket. Such an arrangement can facilitate the phase switching operation of the circuit and improve the convenience and safety during the test process.

[0064] In some embodiments of the present invention, the installation area 11 of the first test board 10 is provided with a plug-in structure, and the plug-in structure is suitable for being electrically connected to the driving side high-end signal input pin, the driving side low-end signal input pin, the high-end power device driving suspended power supply voltage pin, the high-end power device driving suspended power supply ground pin, the low-side gate driving power supply voltage pin, the high-side gate driving power supply voltage pin, the driving side power supply input pin, the analog ground pin, the power side output pin, the DC positive terminal pin and the DC negative terminal pin of the intelligent power module to be tested; and / or the installation area 11 is electrically connected by welding with the driving side high-end signal input pin, the driving side low-end signal input pin, the high-end power device driving suspended power supply voltage pin, the high-end power device driving suspended power supply ground pin, the low-side gate driving power supply voltage pin, the high-side gate driving power supply voltage pin, the driving side power supply input pin, the analog ground pin, the power side output pin, the DC positive terminal pin and the DC negative terminal pin on the intelligent power module to be tested.

[0065] Specifically, for smart power modules with slow switching speed and small current specification (<30A), electrical connection can be achieved through the plug-in structure and the pin plug-in cooperation on the smart power module, and the test device 100 can test the dynamic parameters of the power side of the smart power module.

[0066] For smart power modules with fast switching speed and large current specification (>30A), the installation area 11 can be welded to the corresponding pins of the smart power module to be tested, and the test device 100 can test the dynamic parameters of the smart power module, so that the test device 100 can adapt to more smart power modules.

[0067] Combination Figure 1 As shown, each of the power side pin external needle holder 12, the driving side high-end signal input pin external needle holder 13, the driving side low-end signal input pin external needle holder 14, the high-end power device driving floating power supply voltage pin external needle holder 15, the high-end power device driving floating power supply ground pin external needle holder 16, the low-side gate driving power supply voltage pin external needle holder 17 and the high-side gate driving power supply voltage pin external needle holder 18 includes at least one needle body group 50, each needle body group 50 includes a first needle body portion 51 and a second needle body portion 52 arranged at intervals, the first needle body portion 51 is suitable for being electrically connected to the corresponding pin of the intelligent power module to be tested, and the second needle body portion 52 is suitable for being electrically connected to the external terminal; wherein, the first needle body portion 51 and the second needle body portion 52 of the same needle body group 50 can be selectively electrically connected.

[0068] Specifically, by controlling the connection between the first needle body 51 and the second needle body 52, the test device 100 presents different circuit states, and completes the test of the intelligent power module in different circuit states. This not only simplifies the test process, but also ensures the reliability of the test device 100.

[0069] In some embodiments of the present invention, the first needle body portion 51 and the second needle body portion 52 of the same needle body group 50 are electrically connected via a short-circuit cap. Specifically, when it is necessary to short-circuit two or more pins, a short-circuit cap can be used to achieve a quick connection between the pins, so that the test device 100 presents different circuit states, which not only makes the test process simpler and easier to operate, but also avoids or reduces damage to the needle body group 50 during the test. In addition, the use of a short-circuit cap to achieve electrical connection does not require welding operations, which can improve the stability and reliability of the test state, thereby improving the accuracy of the test results and the safety of the test process.

[0070] Combination Figure 1 As shown, the power side pin external needle holder 12 includes a power side output pin external needle holder 121, a DC positive end pin external needle holder 122 and a DC negative end pin external needle holder 123 which are arranged in sequence in a first direction, the power side output pin external needle holder 121 is suitable for being electrically connected to the power side output pin of the intelligent power module to be tested, the DC positive end pin external needle holder 122 is suitable for being electrically connected to the DC positive end pin of the intelligent power module to be tested, and the DC negative end pin external needle holder 123 is suitable for being electrically connected to the DC negative end pin of the intelligent power module to be tested.

[0071] Combination Figure 1 As shown, the first test board 10 is provided with a power side pin external terminal 19, a pulse width modulation signal external terminal 20, a high-end power device driving suspension power supply voltage external terminal 21, a high-end power device driving suspension power supply ground external terminal 22, and a power supply voltage external terminal 24; the power side pin external terminal 19 is electrically connected to the second pin body portion 52 of the power side pin external pin holder 12; the pulse width modulation signal external terminal 20 is respectively connected to the second pin body portion 52 of the driving side high-end signal input pin external pin holder 13 and the driving side low-end signal input pin external pin holder 14 2 is electrically connected; the high-end power device driving floating power supply voltage external terminal 21 is electrically connected to the second needle body portion 52 of the high-end power device driving floating power supply voltage pin external needle seat 15, and the high-end power device driving floating power supply ground external terminal 22 is electrically connected to the second needle body portion 52 of the high-end power device driving floating power supply ground pin external needle seat 16; the power supply voltage external terminal 24 is electrically connected to the second needle body portion 52 of the low-side gate driving power supply voltage pin external needle seat 17 and the second needle body portion 52 of the high-side gate driving power supply voltage pin external needle seat 18 respectively.

[0072] Combination Figure 1 As shown, the power side pin external terminal 19 includes a power side output pin external terminal 191, a DC positive pin external terminal 192 and a DC negative pin external terminal 193. The power side output pin external terminal 191 is electrically connected to the second pin body portion 52 of the power side output pin external needle holder 121, the DC positive pin external terminal 192 is electrically connected to the second pin body portion 52 of the DC positive pin external needle holder 122, and the DC negative pin external terminal 193 is electrically connected to the second pin body portion 52 of the DC negative pin external needle holder 123.

[0073] In some examples of the present invention, each of the power side pin external terminal 19, the pulse width modulation signal external terminal 20, the high-end power device drive floating supply voltage external terminal 21, the high-end power device drive floating power ground external terminal 22 and the power supply voltage external terminal 24 includes a base 35 and a connecting ring 36, the base 35 is arranged on the first test board 10, the connecting ring 36 is arranged on the base 35 and is suitable for being electrically connected to the second needle body portion 52 of the corresponding needle seat, and the connecting ring 36 is a metal connecting ring 36 and is electrically connected to an external power supply or a tester.

[0074] Combination Figure 1 As shown, there are multiple external needle holders 13 for high-end signal input pins on the driving side, and the multiple external needle holders 13 for high-end signal input pins on the driving side are suitable for being electrically connected one-to-one with multiple high-end signal input pins on the driving side of the intelligent power module to be tested; there are multiple external needle holders 14 for low-end signal input pins on the driving side, and the multiple external needle holders 14 for low-end signal input pins on the driving side are suitable for being electrically connected one-to-one with multiple low-end signal input pins on the driving side of the intelligent power module to be tested; there are multiple external needle holders 15 for high-end power device driving suspended power supply voltage pins, and the multiple external needle holders 15 for high-end power device driving suspended power supply voltage pins are suitable for being electrically connected one-to-one with multiple high-end power device driving suspended power supply voltage pins of the intelligent power module to be tested; there are multiple external needle holders 16 for high-end power device driving suspended power supply ground pins, and the multiple external needle holders 17 for high-end power device driving suspended power supply ground pins are suitable for being electrically connected one-to-one with multiple high-end power device driving suspended power supply voltage pins of the intelligent power module to be tested. A high-end power device driving floating power supply ground pin external needle holder 16 is suitable for one-to-one electrical connection with the high-end power device driving floating power supply ground pins of multiple intelligent power modules to be tested; there are multiple power side pin external needle holders 12, and the multiple power side pin external needle holders 12 are suitable for one-to-one electrical connection with the multiple power side pins of the intelligent power module to be tested; there is one low-side gate drive power supply voltage pin external needle holder 17, and one low-side gate drive power supply voltage pin external needle holder 17 is suitable for electrical connection with multiple low-side gate drive power supply voltage pins of the intelligent power module to be tested; there is one high-side gate drive power supply voltage pin external needle holder 18, and one high-side gate drive power supply voltage pin external needle holder 18 is suitable for electrical connection with multiple high-side gate drive power supply voltage pin external needle holders 18 of the intelligent power module to be tested.

[0075] This arrangement can not only improve the compatibility and versatility of the test device 100, so that the test device 100 can adapt to different intelligent power modules, but also make each pin external socket have a certain scalability. Specifically, an additional connection interface can be provided to facilitate connection with an external circuit or device, so that the test device 100 can be upgraded or the function expanded to a certain extent.

[0076] Combination Figure 1 As shown, multiple drive side high-end signal input pin external needle holders 13 include a U-phase drive side high-end signal input pin external needle holder, a V-phase drive side high-end signal input pin external needle holder and a W-phase drive side high-end signal input pin external needle holder; multiple drive side low-end signal input pin external needle holders 14 include a U-phase drive side low-end signal input pin external needle holder, a V-phase drive side low-end signal input pin external needle holder and a W-phase drive side low-end signal input pin external needle holder; multiple high-end power device drive suspension power supply voltage pin external needle holders 15 include a U-phase high-end power device drive suspension power supply voltage pin external needle holder, a V-phase high-end power device drive suspension The power supply voltage pin external needle holder and the W-phase high-end power device drive floating power supply voltage pin external needle holder; multiple high-end power device drive floating power ground pin external needle holder 16 include the U-phase high-end power device drive floating power ground pin external needle holder, the V-phase high-end power device drive floating power ground pin external needle holder and the W-phase high-end power device drive floating power ground pin external needle holder; multiple power side output pin external needle holders 121 include the U-phase power side pin external needle holder, the V-phase power side pin external needle holder and the W-phase power side pin external needle holder. Such an arrangement can facilitate the phase switching operation of the circuit and improve the convenience and safety during the test process.

[0077] Combination Figure 1 As shown, a fault output needle holder 25, a pull-up resistor needle holder 23 and a fault output external terminal 26 are provided on the first test board 10, the fault output needle holder 25 is electrically connected to the fault output pin of the intelligent power module to be tested, the pull-up resistor needle holder 23 is electrically connected to the fault output external terminal 26, and the fault output needle holder 25 and the pull-up resistor needle holder 23 are electrically connected via a short-circuit cap.

[0078] In this arrangement, the fault output pin socket 25 is electrically connected to the fault output pin of the intelligent power module to be tested. When an abnormal situation occurs in the circuit, it can be detected by the fault output pin socket 25, and a feedback signal can be output and transmitted to the corresponding control unit. The control unit responds, such as shutting down and powering off. This can provide a certain degree of protection for the test device 100 and the intelligent power module to be tested.

[0079] Furthermore, the pull-up resistor needle seat 23 is electrically connected to the fault output external terminal 26. Specifically, the fault output needle seat 25 can be connected to the fault output external terminal 26 through a pull-up resistor, or can be directly connected to the fault output external terminal 26. The connection form of the fault output needle seat 25 can be quickly switched through the short-circuit cap.

[0080] Furthermore, the fault output pin socket 25 and the pull-up resistor pin socket 23 are electrically connected through the short-circuit cap, which can not only output the corresponding circuit state through the fault output pin socket 25 to realize the circuit state switching and fault monitoring function, but also pull up its level when the fault output pin socket is in a suspended or uncertain state, providing a clear high-level state, which can improve the stability and reliability of the circuit and ensure the normal operation of the circuit.

[0081] Combination Figure 1 As shown, the fault output external terminal 26 includes a base 35 and a connecting ring 36. The base 35 is arranged on the first test board 10. The connecting ring 36 is arranged on the base 35 and is suitable for being electrically connected to the pull-up resistor needle seat 23. The connecting ring 36 is a metal connecting ring 36 and is electrically connected to an external power supply or a tester.

[0082] With this arrangement, the base 35 can be used to ensure the stability of the connecting ring 36 , so that the connecting ring 36 is not easily tilted or deformed, thereby improving the overall stability and reliability of the fault output external terminal 26 .

[0083] Furthermore, the connecting ring 36 is disposed on the base 35 and is suitable for being electrically connected to the pull-up resistor pin seat 23. The connecting ring 36 is a metal connecting ring 36 and is electrically connected to an external power supply or a tester. When the test device 100 fails and the power supply or data transmission cannot be normal, the external power supply can be used as a temporary power supply solution, and can also help to troubleshoot and analyze circuit faults. In this way, the external tester can monitor the signal of the faulty output port more continuously and accurately.

[0084] Combination Figure 1 As shown, an overcurrent protection terminal needle holder 29 and a first drive side ground pin external needle holder 30 are provided on the first side of the first test board 10, the overcurrent protection terminal needle holder 29 is suitable for being electrically connected to the short-circuit voltage sampling pin of the intelligent power module to be tested, the first drive side ground pin external needle holder 30 is suitable for being electrically connected to the drive side ground pin of the intelligent power module to be tested, and the overcurrent protection terminal needle holder 29 and the first drive side ground pin external needle holder 30 are electrically connected via a short-circuit cap.

[0085] In this way, by setting the overcurrent protection terminal needle holder 29, the overcurrent protection terminal needle holder 29 can be connected in series to the circuit, thereby preventing excessive current from passing through the circuit. This not only avoids irreversible damage to some circuit components or intelligent power modules due to excessive current, but also ensures the stability and reliability of the test process when the output power of the intelligent power module is small.

[0086] Furthermore, when it is necessary to shield the overcurrent protection terminal needle holder 29, a short-circuit cap can be used to short-circuit the first needle body 51 and the second needle body 52 of the overcurrent protection terminal needle holder 29, so that the current allowed to pass through the circuit is appropriately increased, thereby realizing testing of some high-power modules.

[0087] Combination Figure 1 As shown, a power side ground pin external needle holder 31 and a second drive side ground pin external needle holder 32 are provided on one side of the first test board 10, the power side ground pin external needle holder 31 is suitable for being electrically connected to the power side ground pin of the intelligent power module to be tested, the second drive side ground pin external needle holder 32 is suitable for being electrically connected to the drive side ground pin of the intelligent power module to be tested, and the power side ground pin external needle holder 31 and the second drive side ground pin external needle holder 32 are electrically connected via a short-circuit cap.

[0088] In this way, the power side ground pin external needle seat 31 and the second drive side ground pin external needle seat 32 are electrically connected through the short-circuit cap, so that the power side and the drive side of the test device 100 are grounded together, that is, the zero potential reference points are the same. Further, the power module to be tested and the test device 100 can be grounded together, providing a common zero potential reference point for the power module to be tested and the test device 100, which can ensure the accuracy of the test results of the test device 100 on the intelligent power module to be tested.

[0089] According to the test device 100 of the intelligent power module of the present invention, since the structure of the test device 100 is more stable and has good working performance, applying the test device 100 to the electrical performance test of the intelligent power module can not only ensure the accuracy of the test results, but also improve the test efficiency. Furthermore, the intelligent power modules with manufacturing defects or faults can be screened out, or when the intelligent power module fails, the test device 100 of the intelligent power module can be used to accurately locate and analyze the fault.

[0090] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0092] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A test device for an intelligent power module, characterized in that: include: A first test board (10), the first test board (10) having a first side and a second side along a thickness direction thereof, the first side of the first test board (10) being provided with a mounting area (11), the mounting area (11) being suitable for mounting an intelligent power module to be tested; A first side of the first test board (10) is provided with a drive side high-end signal input pin external needle holder (13) and a drive side low-end signal input pin external needle holder (14) located outside the mounting area (11), the drive side high-end signal input pin external needle holder (13) being suitable for being electrically connected to a drive side high-end signal input pin of the intelligent power module to be tested, and the drive side low-end signal input pin external needle holder (14) being suitable for being electrically connected to a drive side low-end signal input pin of the intelligent power module to be tested; A high-end power device driving suspended power supply voltage pin external pin holder (15) and a high-end power device driving suspended power supply ground pin external pin holder (16) located outside the installation area (11) are provided on the first side of the first test board (10); the high-end power device driving suspended power supply voltage pin external pin holder (15) is suitable for being electrically connected to a high-end power device driving suspended power supply voltage pin of the intelligent power module to be tested; and the high-end power device driving suspended power supply ground pin external pin holder (16) is suitable for being electrically connected to a high-end power device driving suspended power supply ground pin of the intelligent power module to be tested; A low-side gate drive power supply voltage pin external pin holder (17) and a high-side gate drive power supply voltage pin external pin holder (18) located outside the mounting area (11) are provided on the first side of the first test board (10); the low-side gate drive power supply voltage pin external pin holder (17) is suitable for being electrically connected to the low-side gate drive power supply voltage pin of the intelligent power module to be tested, and the high-side gate drive power supply voltage pin external pin holder (18) is suitable for being electrically connected to the high-side gate drive power supply voltage pin of the intelligent power module to be tested; The first side of the first test board (10) is provided with a power side pin external needle holder (12) located outside the installation area (11), and the power side pin external needle holder (12) is suitable for being electrically connected to the power side pin of the intelligent power module to be tested. When the control parameters of the driving side of the intelligent power module to be tested are tested, the power side pin external needle holder (12) supplies power to the power side of the intelligent power module to be tested, and the driving side high-end signal input pin external needle holder (13), the driving side low-end signal input pin external needle holder (14), the high-end power device driving suspension power supply voltage pin external needle holder (15), the high-end power device driving suspension power supply ground pin external needle holder (16), the low-side gate driving power supply voltage pin external needle holder (17) and the high-side gate driving power supply voltage pin external needle holder (18) output the test results; A second test board (40), wherein the second test board (40) is provided with a drive side pin external socket (41), a power side pin external socket (42), a dual pulse signal input pin external socket (43) and an electrolytic capacitor external socket (44), wherein the drive side pin external socket (41) is suitable for being electrically connected to the drive side pin of the intelligent power module to be tested, the power side pin external socket (42) is suitable for being electrically connected to the power side pin of the intelligent power module to be tested, the dual pulse signal input pin external socket (43) is suitable for being electrically connected to the dual pulse signal input pin of the intelligent power module to be tested, the electrolytic capacitor external socket (44) is electrically connected to the power side pin external socket (42), and the electrolytic capacitor external socket (44) is suitable for externally connecting an electrolytic capacitor; When testing the dynamic parameters of the power side of the intelligent power module to be tested, the drive side pin external socket (41) supplies power to the drive side of the intelligent power module to be tested, the power side pin external socket (42) supplies power to the power side of the intelligent power module to be tested, the dual pulse signal input pin external socket (43) provides a pulse signal to the intelligent power module to be tested, the electrolytic capacitor external socket (44) is externally connected to an electrolytic capacitor to provide energy for the test, and an external tester is electrically connected to the pins of the intelligent power module to be tested, so that the intelligent power module to be tested outputs a dynamic parameter test result.

2. The test device for the intelligent power module according to claim 1, characterized in that: The drive side pin external connection seat (41) and the double pulse signal input pin external connection seat (43) together form an integral first external connection seat (45), and the power side pin external connection seat (42) forms an integral second external connection seat (46).

3. The testing device for the intelligent power module according to claim 2, characterized in that: A first adapter seat (33) and / or a second adapter seat (34) is provided on the second side of the first test plate (10); The first adapter (33) is suitable for being electrically connected to the power side pin of the intelligent power module to be tested, one of the first adapter (33) and the first external connection seat (45) is provided with a first needle body and the other is provided with a first pin hole, and the first pin hole is plugged and matched with the first needle body to achieve electrical connection; The second adapter (34) is electrically connected to the drive side pin and the dual pulse signal input pin of the intelligent power module to be tested, one of the second adapter (34) and the second external socket (46) is provided with a second needle body and the other is provided with a second pinhole, and the second pinhole is plugged into and matched with the second needle body to achieve electrical connection.

4. The testing device for the intelligent power module according to claim 3, characterized in that: The projection of the first adapter seat (33) and the first external seat (45) on the first side of the first test board (10) is set as a first projection portion, and the projection of the second adapter seat (34) and the second external seat (46) on the first side of the first test board (10) is set as a second projection portion, and the first projection portion and the second projection portion are respectively arranged at intervals on both sides of the first direction of the installation area (11).

5. The testing device for the intelligent power module according to claim 4, characterized in that: The external needle seat (13) of the high-end signal input pin of the driving side, the external needle seat (14) of the low-end signal input pin of the driving side, the external needle seat (15) of the high-end power device driving floating power supply voltage pin, the external needle seat (16) of the high-end power device driving floating power supply ground pin, the external needle seat (17) of the low-side gate driving power supply voltage pin and the external needle seat (18) of the high-side gate driving power supply voltage pin together constitute an integrally formed external needle seat assembly (38), the external needle seat assembly (38) is arranged at intervals on a side of the first projection portion in a first direction away from the installation area (11), and the power side pin external needle seat (12) is arranged at intervals on a side of the installation area (11) in a second direction.

6. The testing device for the intelligent power module according to claim 1, characterized in that: The drive side pin external connection seat (41) comprises a drive side power input pin external connection seat (411) and an analog ground pin external connection seat (412); the drive side power input pin external connection seat (411) is suitable for being electrically connected to a drive side power input pin of an intelligent power module to be tested; and the analog ground pin external connection seat (412) is suitable for being electrically connected to an analog ground pin of an intelligent power module to be tested; The dual pulse signal input pin external socket (43) comprises a driving side high-end signal input pin external socket (431) and a driving side low-end signal input pin external socket (432), wherein the driving side high-end signal input pin external socket (431) is suitable for being electrically connected to a driving side high-end signal input pin of an intelligent power module to be tested, and the driving side low-end signal input pin external socket (432) is suitable for being electrically connected to a driving side low-end signal input pin of an intelligent power module to be tested; The power side pin external connection seat (42) comprises a power side output pin external connection seat (421), a DC positive terminal pin external connection seat (422) and a DC negative terminal pin external connection seat (423); the power side output pin external connection seat (421) is suitable for being electrically connected to a power side output pin of an intelligent power module to be tested, the DC positive terminal pin external connection seat (422) is suitable for being electrically connected to a DC positive terminal pin of the intelligent power module to be tested, and the DC negative terminal pin external connection seat (423) is suitable for being electrically connected to a DC negative terminal pin of the intelligent power module to be tested.

7. The testing device for the intelligent power module according to claim 6, characterized in that: It also includes a drive side power input socket (413) and a simulated ground socket (414), wherein the drive side power input socket (413) and the simulated ground socket (414) are suitable for being plugged and electrically connected to a drive side power supply device, the drive side power input socket (413) is electrically connected to the drive side power input pin external socket (411), and the simulated ground socket (414) is connected to the simulated ground pin external socket (412); It also includes a drive side high-end signal input pin external socket (433) and a drive side low-end signal input pin external socket (434), wherein the drive side high-end signal input pin external socket (433) and the drive side low-end signal input pin external socket (434) are suitable for plugging and electrically connecting with the signal generator, the drive side high-end signal input pin external socket (433) is electrically connected to the drive side high-end signal input pin external socket (431), and the drive side low-end signal input pin external socket (434) is electrically connected to the drive side low-end signal input pin external socket (432); It also includes a power side output pin external socket (424), a DC positive pin external socket (425) and a DC negative pin external socket (426); the power side output pin external socket (424), the DC positive pin external socket (425) and the DC negative pin external socket (426) are all suitable for plugging and electrically connecting with a power side power supply; the power side output pin external socket (424), the DC positive pin external socket (425) and the DC negative pin external socket (426) are all electrically connected to the power side pin external socket (42).

8. The testing device for the intelligent power module according to claim 7, characterized in that: The drive side power input socket (413), the analog ground socket (414), the power side output pin external socket (424), the DC positive terminal pin external socket (425) and the DC negative terminal pin external socket (426) are all suitable for plugging and matching with an external banana plug; The driving side high-end signal input pin external socket (433) and the driving side low-end signal input pin external socket (434) both comprise a metal grounding protection ring and a metal plug-in portion, wherein the metal grounding protection ring is arranged around the outside of the metal plug-in portion, and the metal plug-in portion is a plug hole or a plug connector; A third pinhole is provided on one of the electrolytic capacitor external socket (44) and the electrolytic capacitor, and a third pin body is provided on the other. The third pinhole and the third pin body are plugged and matched to achieve electrical connection.

9. The testing device for the intelligent power module according to claim 6, characterized in that: There are a plurality of power side output pin external connection seats (421), and the plurality of power side output pin external connection seats (421) are suitable for being electrically connected to a plurality of power side output pins of the intelligent power module to be tested in a one-to-one correspondence; There are a plurality of drive side high-end signal input pin external sockets (431), and the plurality of drive side high-end signal input pin external sockets (431) are suitable for being electrically connected to a plurality of drive side high-end signal input pins of the intelligent power module to be tested in a one-to-one correspondence; There are a plurality of drive side low-end signal input pin external sockets (432), and the plurality of drive side low-end signal input pin external sockets (432) are suitable for one-to-one electrical connection with a plurality of drive side low-end signal input pins of the intelligent power module to be tested.

10. The testing device for the intelligent power module according to claim 9, characterized in that: The plurality of power side output pin external sockets (421) include a U-phase power side output pin external socket, a V-phase power side output pin external socket and a W-phase power side output pin external socket; The plurality of drive side high-end signal input pin external sockets (431) include a U-phase drive side high-end signal input pin external socket, a V-phase drive side high-end signal input pin external socket and a W-phase drive side high-end signal input pin external socket; The plurality of driving side low-end signal input pin external sockets (432) include a driving side low-end signal input pin external socket, a V-phase driving side low-end signal input pin external socket and a W-phase driving side low-end signal input pin external socket.

11. The testing device for the intelligent power module according to claim 6, characterized in that: The installation area (11) of the first test board (10) is provided with a plug-in structure, and the plug-in structure is suitable for being electrically connected to the driving side high-end signal input pin, the driving side low-end signal input pin, the high-end power device driving suspension power supply voltage pin, the high-end power device driving suspension power supply ground pin, the low-side gate driving power supply voltage pin, the high-side gate driving power supply voltage pin, the driving side power input pin, the analog ground pin, the power side output pin, the DC positive terminal pin and the DC negative terminal pin of the intelligent power module to be tested; and / or The installation area (11) is electrically connected by welding with a driving side high-end signal input pin, a driving side low-end signal input pin, a high-end power device driving suspension power supply voltage pin, a high-end power device driving suspension power supply ground pin, a low-side gate driving power supply voltage pin, a high-side gate driving power supply voltage pin, a driving side power input pin, an analog ground pin, a power side output pin, a DC positive terminal pin and a DC negative terminal pin on the intelligent power module to be tested.

12. The testing device for an intelligent power module according to claim 1, characterized in that: Each of the power side pin external needle holder (12), the drive side high-end signal input pin external needle holder (13), the drive side low-end signal input pin external needle holder (14), the high-end power device drive floating power supply voltage pin external needle holder (15), the high-end power device drive floating power supply ground pin external needle holder (16), the low-side gate drive power supply voltage pin external needle holder (17) and the high-side gate drive power supply voltage pin external needle holder (18) comprises at least one needle body group (50), each of the needle body groups (50) comprises a first needle body portion (51) and a second needle body portion (52) arranged at intervals, the first needle body portion (51) being suitable for being electrically connected to a corresponding pin of the intelligent power module to be tested, and the second needle body portion (52) being suitable for being electrically connected to an external terminal; The first needle body part (51) and the second needle body part (52) of the same needle body group (50) can be selectively electrically connected.

13. The testing device for the intelligent power module according to claim 12, characterized in that: The first needle body part (51) and the second needle body part (52) of the same needle body group (50) are electrically connected via a short-circuit cap.

14. The testing device for the intelligent power module according to claim 12, characterized in that: The power side pin external needle holder (12) comprises a power side output pin external needle holder (121), a DC positive end pin external needle holder (122) and a DC negative end pin external needle holder (123) arranged in sequence in a first direction; the power side output pin external needle holder (121) is suitable for being electrically connected to a power side output pin of an intelligent power module to be tested, the DC positive end pin external needle holder (122) is suitable for being electrically connected to a DC positive end pin of the intelligent power module to be tested, and the DC negative end pin external needle holder (123) is suitable for being electrically connected to a DC negative end pin of the intelligent power module to be tested.

15. The testing device for the intelligent power module according to claim 14, characterized in that: The first test board (10) is provided with a power side pin external terminal (19), a pulse width modulation signal external terminal (20), a high-end power device driving suspension power supply voltage external terminal (21), a high-end power device driving suspension power supply ground external terminal (22), and a power supply voltage external terminal (24); The power side pin external connection terminal (19) is electrically connected to the second pin body portion (52) of the power side pin external connection pin seat (12); The pulse width modulation signal external terminal (20) is electrically connected to the second needle body portion (52) of the driving side high-end signal input pin external needle seat (13) and the driving side low-end signal input pin external needle seat (14) respectively; The high-end power device driving suspension power supply voltage external terminal (21) is electrically connected to the second needle body portion (52) of the high-end power device driving suspension power supply voltage pin external needle seat (15), and the high-end power device driving suspension power supply ground external terminal (22) is electrically connected to the second needle body portion (52) of the high-end power device driving suspension power supply ground pin external needle seat (16); The power supply voltage external terminal (24) is electrically connected to the second needle body portion (52) of the low-side gate drive power supply voltage pin external needle seat (17) and the second needle body portion (52) of the high-side gate drive power supply voltage pin external needle seat (18), respectively.

16. The testing device for the intelligent power module according to claim 15, characterized in that: The power side pin external terminal (19) comprises a power side output pin external terminal (191), a DC positive pin external terminal (192) and a DC negative pin external terminal (193); the power side output pin external terminal (191) is electrically connected to the second pin body portion (52) of the power side output pin external needle seat (121); the DC positive pin external terminal (192) is electrically connected to the second pin body portion (52) of the DC positive pin external needle seat (122); and the DC negative pin external terminal (193) is electrically connected to the second pin body portion (52) of the DC negative pin external needle seat (123).

17. The testing device for the intelligent power module according to claim 15, characterized in that: Each of the power side pin external terminal (19), the pulse width modulation signal external terminal (20), the high-end power device driving floating power supply voltage external terminal (21), the high-end power device driving floating power ground external terminal (22) and the power supply voltage external terminal (24) comprises a base (35) and a connecting ring (36); the base (35) is arranged on the first test board (10); the connecting ring (36) is arranged on the base (35) and is suitable for being electrically connected to the second needle body part (52) of the corresponding needle seat; the connecting ring (36) is a metal connecting ring and is electrically connected to an external power supply or a tester.

18. The testing device for an intelligent power module according to claim 1, characterized in that: There are a plurality of external needle seats (13) for the driving side high-end signal input pins, and the plurality of external needle seats (13) for the driving side high-end signal input pins are suitable for being electrically connected to a plurality of driving side high-end signal input pins of the intelligent power module to be tested in a one-to-one correspondence; There are a plurality of external needle seats (14) for the low-end signal input pins on the driving side, and the plurality of external needle seats (14) for the low-end signal input pins on the driving side are suitable for being electrically connected to a plurality of low-end signal input pins on the driving side of the intelligent power module to be tested in a one-to-one correspondence; There are a plurality of external pin sockets (15) for driving the floating power supply voltage pins of the high-end power device, and the plurality of external pin sockets (15) for driving the floating power supply voltage pins of the high-end power device are suitable for being electrically connected one-to-one with the plurality of high-end power device driving the floating power supply voltage pins of the intelligent power module to be tested; There are a plurality of external pin holders (16) for driving the suspended power supply ground pins of the high-end power device, and the plurality of external pin holders (16) for driving the suspended power supply ground pins of the high-end power device are suitable for one-to-one electrical connection with the high-end power device driving suspended power supply ground pins of the plurality of intelligent power modules to be tested; There are a plurality of power side pin external connection needle seats (12), and the plurality of power side pin external connection needle seats (12) are suitable for being electrically connected to a plurality of power side pins of the intelligent power module to be tested in a one-to-one correspondence; There is one low-side gate drive power supply voltage pin external needle seat (17), and one low-side gate drive power supply voltage pin external needle seat (17) is suitable for being electrically connected to a plurality of low-side gate drive power supply voltage pins of the intelligent power module to be tested; There is one high-side gate drive power supply voltage pin external needle holder (18), and one high-side gate drive power supply voltage pin external needle holder (18) is suitable for being electrically connected to multiple high-side gate drive power supply voltage pin external needle holders (18) of the intelligent power module to be tested.

19. The testing device for the intelligent power module according to claim 18, characterized in that: The plurality of drive side high-end signal input pin external needle holders (13) include a U-phase drive side high-end signal input pin external needle holder, a V-phase drive side high-end signal input pin external needle holder and a W-phase drive side high-end signal input pin external needle holder; The plurality of drive side low-end signal input pin external connection needle seats (14) include a U-phase drive side low-end signal input pin external connection needle seat, a V-phase drive side low-end signal input pin external connection needle seat and a W-phase drive side low-end signal input pin external connection needle seat; The plurality of high-end power device driving floating power supply voltage pin external pin sockets (15) include a U-phase high-end power device driving floating power supply voltage pin external pin socket, a V-phase high-end power device driving floating power supply voltage pin external pin socket and a W-phase high-end power device driving floating power supply voltage pin external pin socket; The plurality of high-end power device driving suspension power supply ground pin external pin holders (16) include a U-phase high-end power device driving suspension power supply ground pin external pin holder, a V-phase high-end power device driving suspension power supply ground pin external pin holder and a W-phase high-end power device driving suspension power supply ground pin external pin holder; The plurality of power side output pin external connection needle sockets (121) include a U-phase power side pin external connection needle socket, a V-phase power side pin external connection needle socket and a W-phase power side pin external connection needle socket.

20. The testing device for an intelligent power module according to any one of claims 1 to 19, characterized in that: The first test board (10) is provided with a fault output needle seat (25), a pull-up resistor needle seat (23) and a fault output external terminal (26); the fault output needle seat (25) is electrically connected to the fault output pin of the intelligent power module to be tested, the pull-up resistor needle seat (23) is electrically connected to the fault output external terminal (26), and the fault output needle seat (25) and the pull-up resistor needle seat (23) are electrically connected via a short-circuit cap.

21. The testing device for the intelligent power module according to claim 20, characterized in that: The fault output external terminal (26) comprises a base (35) and a connecting ring (36); the base (35) is arranged on the first test board (10); the connecting ring (36) is arranged on the base (35) and is suitable for being electrically connected to the pull-up resistor needle seat (23); the connecting ring (36) is a metal connecting ring and is electrically connected to an external power supply or a tester.

22. The testing device for an intelligent power module according to any one of claims 1 to 19, characterized in that: An overcurrent protection terminal needle holder (29) and a first drive side ground pin external needle holder (30) are provided on the first side of the first test board (10); the overcurrent protection terminal needle holder (29) is suitable for being electrically connected to the short-circuit voltage sampling pin of the intelligent power module to be tested; the first drive side ground pin external needle holder (30) is suitable for being electrically connected to the drive side ground pin of the intelligent power module to be tested; the overcurrent protection terminal needle holder (29) and the first drive side ground pin external needle holder (30) are electrically connected via a short-circuit cap.

23. The testing device for an intelligent power module according to any one of claims 1 to 19, characterized in that: A power side ground pin external needle holder (31) and a second drive side ground pin external needle holder (32) are provided on one side of the first test board (10); the power side ground pin external needle holder (31) is suitable for being electrically connected to the power side ground pin of the intelligent power module to be tested; the second drive side ground pin external needle holder (32) is suitable for being electrically connected to the drive side ground pin of the intelligent power module to be tested; the power side ground pin external needle holder (31) and the second drive side ground pin external needle holder (32) are electrically connected via a short-circuit cap.

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