An intelligent power module testing device and a testing system

Abstract

This application relates to the technical field of test devices, and particularly to an intelligent power module test device and a test system. An intelligent power module test device provided by an embodiment of this application includes a test guide rail for receiving an intelligent power module and transporting it to a preset position, a pressing block for fixing the intelligent power module, and a test bench. The test guide rail has a receiving section that matches the shape of the lower end face of the intelligent power module; the pressing block has a pressing section that matches the shape of the upper end face of the intelligent power module; the left and right positioning of the power module to be tested can be realized, and the positioning pins provided on the pressing block can be connected to the positioning grooves of the molded package of the intelligent power module to realize the positioning of the intelligent power module in the front and back directions. The intelligent power module test device provided by this application can realize the precise positioning of the intelligent power, enable the pins of the power module to be in accurate and precise contact with the test clips, and effectively improve the stability and reliability of the short-circuit test of the intelligent power module.

Description

Technical Field

[0001] This application relates to the technical field of test devices, and particularly to an intelligent power module test device and a test system. Background Art

[0002] At present, an IPM (Intelligent Power Module) has functions such as short-circuit protection, over-current protection, overheat protection, and under-voltage lockout. Among them, the IPM includes a drive circuit, an IGBT (Insulated Gate Bipolar Transistor) test system, a freewheeling diode, a gate resistor, etc. The IPM controls the steepness of the leading edge and trailing edge of the gate voltage of the IGBT test system by adjusting the size of the gate resistor, and further controls the switching loss of the IGBT test system.

[0003] When the IPM intelligent power module is performing a short-circuit test, due to the large test current, if there is poor contact, it is easy to cause misjudgment of the test product and arcing of the test clamp. To improve the problem of poor contact in the short-circuit test of the intelligent power module, it is necessary to design the test device to ensure the stability and reliability of the short-circuit test of the intelligent power module. Summary of the Invention

[0004] In view of this, the purpose of the embodiments of this application is to provide an intelligent power module test device, which can effectively solve the above technical problems.

[0005] In a first aspect, an intelligent power module test device provided by the embodiments of this application includes a test guide rail for receiving the intelligent power module and transporting it to a preset position, a pressing block for fixing the intelligent power module, and a test bench. The test guide rail has a receiving section that matches the shape of the lower end face of the intelligent power module; the pressing block can selectively press against the upper end face of the intelligent power module, and the pressing block has a pressing section that matches the shape of the upper end face of the intelligent power module; the test bench includes a test clamp and a test circuit board connected to the test clamp, and the test guide rail can selectively drive the intelligent power module to move close to the test clamp so that the pins of the intelligent power module are in contact with the test clamp; wherein, a positioning pin is provided on the pressing block, and when the pressing block presses against the upper end face of the intelligent power module, the positioning pin is connected to the positioning groove of the encapsulation body of the intelligent power module.

[0006] In an alternative embodiment according to the first aspect, the intelligent power module testing device further includes a driving device for driving the pressing block to disengage from or press against the intelligent power module. The driving device selectively drives the pressing block so that the pressing block drives the testing guide rail to move close to the testing clamp to make the pins of the intelligent power module contact the testing clamp.

[0007] In an alternative embodiment according to the first aspect, the intelligent power module testing device includes a support base. A sliding guide post is arranged on the support base. An elastic member is arranged at one end of the sliding guide post close to the testing guide rail. The testing guide rail is connected to the sliding guide post on the side away from the pressing block. The elastic member is configured such that when the pressing block drives the testing guide rail to move close to the testing clamp to make the pins of the intelligent power module contact the testing clamp, the elastic member is compressed and stores elastic restoring force. When the pressing block disengages from the testing guide rail, the elastic member drives the testing guide rail to return to the initial position under the action of the elastic restoring force.

[0008] In an alternative embodiment according to the first aspect, a linear bearing, a guide post plate and an adjusting screw are further arranged on the support base. The sliding guide post is connected to the support base through the linear bearing and the guide post plate. The adjusting screw penetrates through the guide post plate and is connected to the testing guide rail. The initial position height of the testing guide rail can be selectively adjusted by adjusting the adjusting screw.

[0009] In an alternative embodiment according to the first aspect, the intelligent power module testing device further includes a loading guide rail. The loading guide rail is flush with the initial position height of the testing guide rail, and the loading guide rail and the testing guide rail are arranged on the same straight-line track for enabling the intelligent power module to run along the loading track onto the testing guide rail.

[0010] In an alternative embodiment according to the first aspect, the intelligent power module testing device further includes an upper pressing plate. The upper pressing plate is detachably connected to the pressing block by screws. Positioning end holes are arranged at the edges of the upper pressing plate.

[0011] In an alternative embodiment according to the first aspect, the driving device is set as a cylinder. The cylinder is connected to the upper pressing plate for driving the pressing block.

[0012] In an alternative embodiment according to the first aspect, two positioning pins are arranged on the pressing block at intervals. The positioning pins are matched with the positioning grooves at the front and rear ends of the encapsulation body of the intelligent power module.

[0013] In an alternative embodiment according to the first aspect, the receiving section has a first step groove and a second step groove that match the shape of the lower end face of the intelligent power module, and the pressing section has a third step groove that matches the shape of the upper end face of the intelligent power module.

[0014] In a second aspect, an embodiment of the present application further provides a test system, and the test system includes the above-mentioned intelligent power module test device.

[0015] Compared with the prior art, the intelligent power module test device provided by the present application has at least the following beneficial effects:

[0016] An intelligent power module test device provided by an embodiment of the present application includes a test guide rail for receiving the intelligent power module and transporting it to a preset position, a pressing block for fixing the intelligent power module, and a test bench. Since the test guide rail has a receiving section that matches the shape of the lower end face of the intelligent power module; and the pressing block has a pressing section that matches the shape of the upper end face of the intelligent power module; the left and right positioning of the power module to be tested can be achieved. At the same time, due to the mutual cooperation of the pressing block and the test guide rail, the positioning of the intelligent power module in the up and down directions can also be achieved; further, the positioning pins provided on the pressing block can be connected to the positioning grooves of the encapsulation body of the intelligent power module, thereby achieving the positioning of the intelligent power module in the front and back directions; in summary, the intelligent power module test device provided by the present application can achieve the precise positioning of the intelligent power, realize the accurate and precise contact between the power module pins and the test clips, avoid the phenomenon of poor contact between the power module pins and the test clips, effectively improve the stability and reliability of the short-circuit test of the intelligent power module through this device; avoid the ignition of the test clips and reduce the use cost of the test clips.

[0017] Since the test system provided by the present application includes the above-mentioned intelligent power module test device, it also has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, the present application will be described in more detail based on embodiments and with reference to the drawings.

[0019] Figure 1 is a schematic diagram of the overall structure of the intelligent power module test device according to an embodiment of the present application from a first perspective;

[0020] Figure 2 is Figure 1 the enlarged view at II in

[0021] Figure 3 is a schematic diagram of the overall structure of the intelligent power module test device according to an embodiment of the present application from a second perspective;

[0022] Figure 4It is a schematic diagram of the overall structure of the intelligent power module test device according to an embodiment of the present application from a third perspective;

[0023] Figure 5 It is a schematic diagram of the structure of the test guide rail of the intelligent power module test device according to an embodiment of the present application.

[0024] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale.

[0025] Reference numerals:

[0026] 10 - Intelligent power module test device; 11 - Test guide rail; 111 - Receiving section; 111a - First step groove; 111b - Second step groove; 12 - Loading guide rail; 13 - Pressing block; 131 - Pressing section; 132 - Third step groove; 133 - Positioning pin; 14 - Upper pressing plate; 141 - Screw; 143 - Positioning end hole; 15 - Test bench; 151 - Test clamp; 153 - Test circuit board; 17 - Bracket seat; 171 - Sliding guide post; 175 - Guide post plate; 177 - Adjusting screw. Detailed implementation manners

[0027] The present application will be further described below in conjunction with the detailed implementation manners. It should be understood that these detailed implementation manners are only used to illustrate the present application and not to limit the scope of the present application.

[0028] For the sake of brevity, only some numerical ranges are specifically disclosed herein. However, any lower limit can be combined with any upper limit to form a range not explicitly recited; and any lower limit can be combined with other lower limits to form a range not explicitly recited, and similarly any upper limit can be combined with any other upper limit to form a range not explicitly recited. In addition, each individually disclosed point or single numerical value itself can be used as a lower limit or an upper limit and combined with any other point or single numerical value or combined with other lower limits or upper limits to form a range not explicitly recited.

[0029] In the description herein, it should be noted that unless otherwise specified, "above" and "below" include the recited number, and the meaning of "one or several" in "one or several" is two or more.

[0030] Unless otherwise specified, the terms used in the present application have the well-known meanings commonly understood by those skilled in the art. Unless otherwise specified, the numerical values of the various parameters mentioned in the present application can be measured by various common measurement methods in the art (for example, they can be tested according to the methods given in the embodiments of the present application).

[0031] Embodiment 1:

[0032] Please refer to Figures 1 to 5, an intelligent power module testing device 10 provided by an embodiment of the present application includes a testing guide rail 11 for receiving the intelligent power module 20 and transporting it to a preset position, a pressing block 13 for fixing the intelligent power module 20, and a testing platform 15. The testing guide rail 11 has a receiving section 111 that matches the shape of the lower end face of the intelligent power module 20; the pressing block 13 can selectively press against the upper end face of the intelligent power module 20, and the pressing block 13 has a pressing section 131 that matches the shape of the upper end face of the intelligent power module 20; the testing platform 15 includes a testing clamp 151 and a testing circuit board 153 connected to the testing clamp 151, and the testing guide rail 11 can selectively drive the intelligent power module 20 to move close to the testing clamp 151 so that the pins of the intelligent power module 20 contact the testing clamp 151; wherein, a positioning pin 133 is provided on the pressing block 13, and when the pressing block 13 presses against the upper end face of the intelligent power module 20, the positioning pin 133 is connected to the positioning groove of the encapsulation body of the intelligent power module 20.

[0033] An intelligent power module testing device 10 provided by an embodiment of the present application includes a testing guide rail 11 for receiving the intelligent power module 20 and transporting it to a preset position, a pressing block 13 for fixing the intelligent power module 20, and a testing platform 15. Since the testing guide rail 11 has a receiving section 111 that matches the shape of the lower end face of the intelligent power module 20; and the pressing block 13 has a pressing section 131 that matches the shape of the upper end face of the intelligent power module 20; the left and right positioning of the power module to be tested can be realized. At the same time, due to the mutual cooperation of the pressing block 13 and the testing guide rail 11, the positioning of the intelligent power module 20 in the up and down direction can also be realized; further, the positioning pin 133 provided on the pressing block 13 can be connected to the positioning groove of the encapsulation body of the intelligent power module 20, thereby realizing the positioning of the intelligent power module 20 in the front and back directions; in summary, the intelligent power module testing device 10 provided by the present application can realize the precise positioning of the intelligent power, realize the accurate and precise contact between the pins of the power module and the testing clamp 151, avoid the phenomenon of poor contact between the pins of the power module and the testing clamp 151, effectively improve the stability and reliability of the short-circuit test of the intelligent power module 20 through this device; avoid arcing of the testing clamp 151 and reduce the use cost of the testing clamp 151.

[0034] In an optionally exemplary embodiment, the intelligent power module testing device 10 further includes a driving device (not shown in the figure) for driving the pressing block 13 to disengage from or press against the intelligent power module 20. The driving device selectively drives the pressing block 13 so that the pressing block 13 drives the testing guide rail 11 to move close to the testing clamp 151 to make the pins of the intelligent power module 20 contact the testing clamp 151. It should be noted that in this embodiment, a driving device is provided to selectively drive the pressing block 13 so that the pressing block 13 drives the testing guide rail 11 to move close to the testing clamp 151 to make the pins of the intelligent power module 20 contact the testing clamp 151. During the testing process, the intelligent power module 20 to be tested is placed on the testing guide rail 11, and then the driving device is used to drive the pressing block 13 to press against the intelligent power module 20, so that the testing guide rail 11 moves close to the testing clamp 151 to make the pins of the intelligent power module 20 contact the testing clamp 151, thereby realizing the testing. It can be understood that the setting of the driving device is not limited here. In other specific embodiments, the driving device may not be provided according to the user's needs, and the pressing block 13 can be driven manually to drive the testing guide rail 11 to move.

[0035] In an optionally exemplary embodiment, the intelligent power module testing device 10 includes a support base 17. A sliding guide post 171 is provided on the support base 17. An elastic member is provided at one end of the sliding guide post 171 close to the testing guide rail 11. The testing guide rail 11 is connected to the sliding guide post 171 on the side away from the pressing block 13. The elastic member is configured such that when the pressing block 13 drives the testing guide rail 11 to move close to the testing clamp 151 to make the pins of the intelligent power module 20 contact the testing clamp 151, the elastic member is compressed and stores elastic restoring force. When the pressing block 13 disengages from the testing guide rail 11, the elastic member drives the testing guide rail 11 to return to the initial position under the action of the elastic restoring force. It should be noted that in the embodiment, the support base 17 is provided. On the one hand, the testing device sorter testing station table can be connected through the support base 17. On the other hand, the testing guide rail 11 and the testing table 15 can be supported. In this embodiment, the testing guide rail 11 is connected to the support base 17, and the testing table 15 and the testing clamp 151 are arranged on both sides of the support base 17 adjacent to the testing guide rail 11 to facilitate the testing of the intelligent power module 20.

[0036] It should also be noted that in this embodiment, a sliding guide post 171 is provided on the bracket base 17. An elastic member is provided at one end of the sliding guide post 171 close to the test guide rail 11. The test guide rail 11 is connected to the sliding guide post 171 on the side away from the pressing block 13. The elastic member is configured such that when the pressing block 13 drives the test guide rail 11 to move close to the test clip 151 so that the pin of the intelligent power module 20 contacts the test clip 151, the elastic member is compressed and stores elastic restoring force. When the pressing block 13 disengages from the test guide rail 11, the elastic member drives the test guide rail 11 to return to the initial position under the action of the elastic restoring force. That is, through the sliding guide post 171 and the elastic member, the test guide rail 11 is liftably connected to the bracket base 17, so as to facilitate the testing of the intelligent power module 20 when driving the test guide rail 11 to descend, and facilitate receiving the next intelligent power module 20 to be tested when ascending.

[0037] Specifically, in this embodiment, the elastic member is a spring. A spring is a mechanical part that uses elasticity to work. A part made of elastic material deforms under the action of an external force and returns to its original state after the external force is removed. In this embodiment, setting the elastic member as a spring facilitates the test guide rail 11 to return to the initial position after the pressure of the pressing block 13 is removed.

[0038] In an optionally exemplary embodiment, a linear bearing (not shown in the figure), a guide post plate 175, and an adjustment screw 177 are further provided on the bracket base 17. The sliding guide post 171 is connected to the bracket base 17 through the linear bearing and the guide post plate 175. The adjustment screw 177 passes through the guide post plate 175 and is connected to the test guide rail 11. The height of the initial position of the test guide rail 11 can be selectively adjusted by adjusting the adjustment screw 177. It should be noted that in this embodiment, specifically, the indirect connection between the sliding guide post 171 and the bracket base 17 is achieved by setting the linear bearing and the guide post plate 175, and the height of the initial position of the test guide rail 11 can be selectively adjusted by setting the adjustment screw 177.

[0039] In an optionally exemplary embodiment, the intelligent power module testing device 10 further includes a loading guide rail 12, which is flush with the initial position of the testing guide rail 11 in height, and the loading guide rail 12 and the testing guide rail 11 are arranged on the same straight-line track, and are used to enable the intelligent power module 20 to run along the loading track to the testing guide rail 11. It should be noted that in this embodiment, the setting of the loading guide rail 12 facilitates the automation of the loading process. The loading guide rail 12 is flush with the initial position of the testing guide rail 11 in height, and the loading guide rail 12 and the testing guide rail 11 are arranged on the same straight-line track. During the testing process, it is convenient for the intelligent power module 20 to be tested to smoothly run from the loading track to the testing guide rail 11 and then perform subsequent testing work.

[0040] In an optionally exemplary embodiment, the intelligent power module testing device 10 further includes an upper pressing plate 14, the upper pressing plate 14 and the pressing block 13 are detachably connected by screws 141, and positioning end holes 143 are provided at the edges of the upper pressing plate 14. It should be noted that in this embodiment, the setting of the upper pressing plate 14 facilitates the positioning end holes 143 provided at the edges of the upper pressing plate 14. By adjusting the positions of the positioning end holes 143, the positioning pins 133 installed on the pressing block 13 and the positioning grooves on the power module encapsulation body can be ensured, and thus the accurate positioning of the positioning pins 133 can be guaranteed. Specifically, in this embodiment, the upper pressing plate 14 is set as a rectangular plate structure, and the positioning end holes 143 are provided at the four corners of the upper pressing plate 14 to facilitate the more accurate positioning of the positioning pins 133.

[0041] In an optionally exemplary embodiment, the driving device is set as a cylinder, and the cylinder is connected to the upper pressing plate 14 to drive the pressing block 13. It should be noted that in this embodiment, the driving device is set as a cylinder. A cylinder is a cylindrical metal part that guides a piston to perform linear reciprocating motion in the cylinder. Air converts thermal energy into mechanical energy by expanding in the engine cylinder; gas is compressed by the piston in the compressor cylinder to increase the pressure. At the same time, the principle and structure of the cylinder are simple, easy to install and maintain, and have low requirements for users; it has a large output force, strong adaptability, many stop positions and high control accuracy. Therefore, setting the driving device as a cylinder can effectively drive the pressing block 13 to perform reciprocating motion, facilitate cost reduction, and improve the testing accuracy.

[0042] In an optionally exemplary embodiment, two positioning pins 133 are spaced apart on the pressing block 13, and the positioning pins 133 are engaged with the positioning grooves at the front and rear ends of the encapsulation body of the intelligent power module 20. It should be noted that, in this embodiment, specifically, two positioning pins 133 are spaced apart on the pressing block 13, and the positioning pins 133 are engaged with the positioning grooves at the front and rear ends of the encapsulation body of the intelligent power module 20, that is, by providing two positioning pins 133 engaged with the positioning grooves at the front and rear ends of the encapsulation body of the intelligent power module 20, the front and rear positioning of the intelligent power module 20 can be better achieved, precise positioning can be realized, and the stable test of the short-circuit electrical performance of the power module can be effectively realized.

[0043] In an optionally exemplary embodiment, the receiving section 111 is provided with a first step groove 111a and a second step groove 111b that match the outer shape of the lower end face of the intelligent power module 20, and the pressing section 131 is provided with a third step groove 132 that matches the outer shape of the upper end face of the intelligent power module 20. It should be noted that, specifically, in this embodiment, the receiving section 111 is provided with a first step groove 111a and a second step groove 111b that match the outer shape of the lower end face of the intelligent power module 20, and the pressing section 131 is provided with a third step groove 132 that matches the outer shape of the upper end face of the intelligent power module 20; by providing the first step groove 111a, the second step groove 111b, and the third step groove 132 that match the concave and convex shapes on both sides of the intelligent power module 20, the stability of the intelligent power module 20 when placed on the test guide rail 11 is further ensured. When the pressing block 13 presses, precise positioning can be achieved on both sides, and the intelligent power module 20 can be prevented from moving in the left-right and up-down directions, thereby ensuring the stability of the test. It can be understood that the specific shapes of the receiving section 111 and the pressing section 131 are not limited here. In other specific embodiments, it can also be adaptively designed according to the user's needs and the specific outer shape of the intelligent power module 20.

[0044] Embodiment 2:

[0045] The embodiment of the present application also provides a test system (not shown in the figure), and the test system includes the above-mentioned intelligent power module testing device 10.

[0046] Since the test system provided by the present application includes the above-mentioned intelligent power module testing device 10, it also has the above-mentioned beneficial effects.

[0047] Although the present application has been described with reference to the preferred embodiments, various modifications thereof can be made and components thereof can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An intelligent power module testing device, characterized in that, Including: A test guide rail for receiving an intelligent power module and transporting it to a preset position, the test guide rail having a receiving section that matches the shape of the lower end face of the intelligent power module; A pressing block for fixing the intelligent power module, the pressing block pressing against the upper end face of the intelligent power module, and the pressing block having a pressing section that matches the shape of the upper end face of the intelligent power module; And A test bench, the test bench including a test clip and a test circuit board connected to the test clip, the test guide rail driving the intelligent power module to move close to the test clip so that the pins of the intelligent power module contact the test clip; Wherein, a positioning pin is provided on the pressing block, and when the pressing block presses against the upper end face of the intelligent power module, the positioning pin is connected to the positioning groove of the encapsulation body of the intelligent power module; The intelligent power module testing device includes a support base, a sliding guide post is provided on the support base, an elastic member is provided at one end of the sliding guide post close to the test guide rail, and the test guide rail is connected to the sliding guide post on the side away from the pressing block; the elastic member is configured such that when the pressing block drives the test guide rail to move close to the test clip so that the pins of the intelligent power module contact the test clip, the elastic member is compressed and stores elastic restoring force, and when the pressing block disengages from the test guide rail, the elastic member drives the test guide rail to return to the initial position under the action of the elastic restoring force; A linear bearing, a guide post plate and an adjusting screw are further provided on the support base, the sliding guide post is connected to the support base through the linear bearing and the guide post plate, and the adjusting screw penetrates through the guide post plate and is connected to the test guide rail, and the height of the initial position of the test guide rail is adjusted by adjusting the adjusting screw; The intelligent power module testing device further includes a loading guide rail, the loading guide rail is flush with the height of the initial position of the test guide rail, and the loading guide rail and the test guide rail are arranged on the same straight-line track for enabling the intelligent power module to run along the loading guide rail to the test guide rail; The intelligent power module testing device further includes a driving device for driving the pressing block to disengage from or press against the intelligent power module, the driving device drives the pressing block so that the pressing block drives the test guide rail to move close to the test clip so that the pins of the intelligent power module contact the test clip; Two of the positioning pins are spaced apart on the pressing block, and the positioning pins cooperate with the positioning grooves at the front and rear ends of the encapsulation body of the intelligent power module; The receiving section has a first step groove and a second step groove that match the shape of the lower end face of the intelligent power module, and the pressing section has a third step groove that matches the shape of the upper end face of the intelligent power module.

2. The intelligent power module testing device according to claim 1, wherein The intelligent power module testing device further includes an upper pressing plate, the upper pressing plate is detachably connected to the pressing block by screws, and positioning end holes are provided at the edges of the upper pressing plate.

3. The intelligent power module testing device according to claim 2, characterized in that, The driving device is set as a cylinder, and the cylinder is connected to the upper pressing plate for driving the pressing block.

4. A test system, characterized in that, The test system includes the intelligent power module testing device according to any one of claims 1 to 3.

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