IGBT module performance test tool

Abstract

The utility model discloses an IGBT module performance test tool, comprising a support frame and at least one station installed on the support frame, each station can place an IGBT module and connect the IGBT module into a test system, the station comprises a transverse butt joint part and a longitudinal butt joint part, the transverse butt joint part drives the IGBT module to move linearly in a horizontal plane, and the longitudinal butt joint part drives the IGBT module to move linearly in a horizontal plane. The main circuit input end, the main circuit output end and the heat dissipation channel of the IGBT module are in butt joint with or separated from corresponding interfaces of a test system on a station, the longitudinal butt joint part comprises a probe plate and a second driving assembly, and the probe plate is provided with a probe in butt joint with a module auxiliary control terminal. And the second driving assembly is connected with and drives the probe plate to lift until the probe plate is butted with or separated from the auxiliary control terminal of the module. According to the utility model, the automatic connection between the module and the test system is realized, the module installation time during the test is reduced, the labor is saved, the working efficiency and accuracy are improved, and the work is stable and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of IGBT testing technology, specifically an IGBT module performance testing fixture. Background Technology

[0002] For IGBT modules used in power control units (PCUs), the current testing process requires manually inserting the IGBT module into the port and securing it with screws during product off-line testing. Each installation takes 1-2 hours and requires 2-3 people. Care must be taken to protect the components from scratches during installation, making the process cumbersome. Furthermore, the high-voltage cables lack adequate protection during testing. Utility Model Content

[0003] To address the aforementioned problems in existing technologies, the purpose of this invention is to provide an IGBT module performance testing fixture that automatically connects the input, output, and auxiliary control terminals of the IGBT module's main circuit to the first main interface, second main interface, and probes of the testing system circuit, significantly reducing the IGBT module installation time required during testing. The entire testing process is fully automated, greatly saving manpower and improving work efficiency and accuracy. The fixture operates stably and reliably.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An IGBT module performance testing fixture is disclosed. The IGBT module includes a main circuit input terminal, a main circuit output terminal, a heat dissipation channel, and multiple auxiliary control terminals. The main circuit input terminal, the main circuit output terminal, and two inlets / outlets of the heat dissipation channel are located on the same side of the IGBT module. The auxiliary control terminals are located on the top surface of the IGBT module. The fixture includes a support frame and at least one workstation mounted on the support frame. Each workstation can hold one IGBT module and connect it to a testing system. Each workstation includes a horizontal docking part and a vertical docking part. The horizontal docking part drives the IGBT module to move linearly in a horizontal plane, enabling the main circuit input terminal, the main circuit output terminal, the heat dissipation channel, and the corresponding interfaces of the testing system on the workstation to dock or disconnect. The vertical docking part includes a probe plate and a second driving component. The probe plate is provided with probes that dock with the auxiliary control terminals of the IGBT module. The second driving component connects to and drives the probe plate to rise and fall until the probe plate docks or disconnects from the auxiliary control terminals of the IGBT module.

[0006] As a further improvement to the above technical solution:

[0007] The transverse docking part includes a first support base and a first main interface, a second main interface, a moving part, a connector, a first drive assembly, and two fluid interfaces mounted on the first support base. The first and second main interfaces are interfaces of the test circuit in the test system. One is used to connect to the main circuit input terminal of the IGBT module, and the other is used to connect to the main circuit output terminal. The IGBT module to be tested is mounted on the moving part. The first drive assembly is connected to and drives the moving part to move back and forth through the connector, so that the main circuit input terminal and main circuit output terminal of the IGBT module on the moving part are inserted into the first and second main interfaces. At the same time, the two fluid interfaces are respectively docked with the two inlets and outlets of the heat dissipation channel of the IGBT module, or the moving part moves to the point where the main circuit input terminal and main circuit output terminal of the IGBT module are disconnected from the first and second main interfaces, and the two fluid interfaces are respectively disconnected from the docking of the two inlets and outlets of the heat dissipation channel of the IGBT module.

[0008] The first support includes a first base plate and a first horizontal plate, which are connected in an L-shape. The first base plate is parallel to the horizontal plane, and the first horizontal plate is perpendicular to the first base plate. A first main interface, a second main interface, and two fluid interfaces are provided on the first horizontal plate. The first base plate is provided with two parallel and spaced slide rails, the length of which is perpendicular to the first horizontal plate. The moving part moves along the length of the slide rails.

[0009] The first and second main interfaces are elongated interfaces with their lengths parallel to the horizontal plane. They are arranged parallel to each other and spaced apart, with the first and second main interfaces located between two fluid interfaces.

[0010] The moving part includes a tray, which is a plate-shaped structure, parallel to the horizontal plane, and slides on a slide rail. The top surface of the tray is used to support and define the IGBT module.

[0011] The top surface of the tray is provided with multiple limiting components, including at least two first limiting protrusions and two limiting strips. The first limiting protrusions are located at one end near the first horizontal plate, and the two limiting strips are located at both ends of the tray in the horizontal direction, where the horizontal direction refers to the direction perpendicular to the length of the slide rail.

[0012] The slide rail extends out of the first base plate, the connector passes through the two slide rails and connects to the tray, the first drive assembly is located below the first base plate, and the first drive assembly connects to and drives the connector to move linearly.

[0013] The system has two fluid interfaces, one for fluid inlet and the other for fluid outlet. The two fluid interfaces are connected to an external gas supply component or water supply component. The gas supply component provides gas at a set pressure to the heat dissipation channel, and the water supply component provides cooling water to the heat dissipation channel.

[0014] The probes on the probe board are the interfaces for the test circuits in the test system.

[0015] The longitudinal docking part also includes a second support base, and a second drive component is mounted on the second support base. The second drive component is a linear module.

[0016] The beneficial effects of this utility model are:

[0017] (1) Automatic connection of the input terminal, output terminal, auxiliary control terminal of the IGBT module main circuit to the first main interface, second main interface and probes of the test system circuit is realized, which greatly reduces the IGBT module installation time required during testing.

[0018] (2) The entire testing process is a fully automated testing action and process, which greatly saves manpower and improves work efficiency and accuracy. The tooling works stably and reliably.

[0019] (3) The travel speed of the IGBT module during docking can be adjusted by each driving component. By setting an appropriate speed, the damage to the product plug during docking can be ignored, the docking is accurate, and there will be no appearance problems such as surface contamination, scratches and deformation of the device.

[0020] (4) It can meet the heat dissipation requirements during the testing process.

[0021] (5) The tooling is suitable for testing the IGBT module of the power control unit. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the workstation structure according to one embodiment of the present utility model.

[0024] Figure 3 This is a schematic diagram of the structure of the transverse docking portion according to an embodiment of the present invention. Detailed Implementation

[0025] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0026] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0027] An IGBT module performance testing fixture, such as Figure 1 The system includes a support frame 10 and at least one workstation 20 mounted on the support frame 10. Each workstation 20 can hold an IGBT module and connect the IGBT module to the test system to simulate the normal working state of the IGBT module, which facilitates the testing of the IGBT module's functions.

[0028] In this embodiment, three workstations 20 are provided, arranged in a row on the support frame 10. Other components of the testing system can be flexibly arranged in the remaining space outside the workstations on the support frame 10.

[0029] Preferably, the bottom of the support frame 10 is provided with rollers 120 to facilitate the movement of the tooling.

[0030] In this embodiment, the IGBT module is the IGBT module of the power control unit.

[0031] The IGBT module includes a main circuit input terminal, a main circuit output terminal, a heat dissipation channel, and multiple auxiliary control terminals. The heat dissipation channel has two inlets and outlets. The main circuit input terminal, the main circuit output terminal, and the two inlets and outlets of the heat dissipation channel are located on the same side of the IGBT module. The auxiliary control terminals are located on the top surface of the IGBT module.

[0032] The test circuits and items in the test system can adopt existing technologies and are not covered by this solution, so they will not be described here.

[0033] Workstation 20 Figure 2 and 3As shown, it includes a horizontal docking section and a vertical docking section. The horizontal docking section automatically connects the main circuit input terminal and the main circuit output terminal of the IGBT module to the corresponding interface on the workstation 20 and completes the heat dissipation water circuit connection of the product. The vertical docking section automatically connects the auxiliary control terminal of the IGBT module to the corresponding interface on the workstation 20.

[0034] Lateral joints, such as Figure 3 As shown, the transverse docking part includes a first support base 11, a first main interface 12, a second main interface 13, a moving part, a connector 16, a first drive assembly 17, and two fluid interfaces 14.

[0035] The first main interface 12 and the second main interface 13 are interfaces for the test circuit in the test system. One is used to connect to the main circuit input terminal of the IGBT module, and the other is used to connect to the main circuit output terminal. The IGBT module to be tested is mounted on the moving part. The first driving component 17 connects to and drives the moving part to reciprocate through the connector 16, so that the main circuit input terminal and the main circuit output terminal of the IGBT module on the moving part are inserted into the first main interface 12 and the second main interface 13. At the same time, the two fluid interfaces 14 are respectively connected to the two inlets and outlets of the heat dissipation channel of the IGBT module. Alternatively, the moving part moves until the main circuit input terminal and the main circuit output terminal of the IGBT module are disconnected from the first main interface 12 and the second main interface 13, and the two fluid interfaces 14 are respectively disconnected from the two inlets and outlets of the heat dissipation channel of the IGBT module.

[0036] The first support base 11 includes a first base plate 111 and a first horizontal plate 112, which are connected in an L-shape. The first base plate 111 is parallel to the horizontal plane, and the first horizontal plate 112 is perpendicular to the first base plate 111. A first main interface 12, a second main interface 13, and two fluid interfaces 14 are disposed on the first horizontal plate 112. The first main interface 12 and the second main interface 13 are elongated interfaces, with their length direction parallel to the horizontal plane, and are arranged parallel to each other at intervals. The first main interface 12 and the second main interface 13 are located between the two fluid interfaces 14. The first base plate 111 is provided with two parallel and spaced slide rails 113. Preferably, the slide rails 113 extend out of the first base plate 111. The length of the slide rails 113 is perpendicular to the first horizontal plate 112.

[0037] Two fluid interfaces 14 are provided, one as a fluid inlet and the other as a fluid outlet. The two fluid interfaces 14 are connected to an external gas supply component or water supply component. The gas supply component provides gas at a set pressure to the heat dissipation channel, and the water supply component provides cooling water to the heat dissipation channel.

[0038] Furthermore, the fluid inlet is switchably connected to either a gas supply unit or a water supply unit via a three-way valve. A shut-off valve and a three-way valve are arranged on the pipe connecting to the fluid outlet. The shut-off valve is located between the fluid outlet and the three-way valve, closing the fluid outlet and allowing it to be switchably connected to the external environment and the water supply unit via the three-way valve. Preferably, a pressure gauge is installed on the connecting pipe between the gas supply unit and the heat dissipation channel to detect the pressure in the heat dissipation channel.

[0039] The moving part includes a tray 151, which slides on slide rails 113 and is parallel to the horizontal plane. Specifically, the tray 151 has a plate-like structure, and sliders that cooperate with the two slide rails 113 are provided at both ends of the bottom surface of the tray 151. The top surface of the tray 151 is used to support the IGBT module. In order to limit the movement of the IGBT module, the top surface of the tray 151 is provided with multiple limiting components, including two first limiting protrusions 152 and two limiting strips 153. The two first limiting protrusions 152 are located at one end near the first horizontal plate 112, and the two limiting strips 153 are respectively located at both ends of the transverse direction of the tray 151, where transverse direction refers to the direction perpendicular to the length of the slide rails 113.

[0040] The connector 16 is a plate-shaped structure. The connector 16 passes through two slide rails 113 and connects to the tray 151. The connector 16 is perpendicular to the tray 151. The connector 16 is provided with at least two second limiting protrusions 154, which protrude from the surface of the connector 16 and face the tray 151.

[0041] The limiting components on the tray 151 and the limiting protrusions on the connectors 16 are set according to the shape of the IGBT module to be tested, so that when the IGBT module is placed on the tray 151 from above, its surroundings are limited by the first limiting protrusion 152, the limiting strip 153 and the second limiting protrusion 154 and cannot move.

[0042] The first drive assembly 17 is located below the first base plate 111. The first drive assembly 17 connects to and drives the connector 16 to move linearly, so that the connector 16 drives the tray 151 to move synchronously linearly along the slide rail 113.

[0043] In this embodiment, the first drive component 17 is an electric cylinder, which can drive the connecting piece 16 to move linearly, and the pressure and speed are adjustable.

[0044] The longitudinal docking section includes a second support base 21 and a second driving assembly 22. The second support base 21 is equipped with a probe plate 23 adapted to the IGBT module. Each probe on the probe plate 23 serves as an interface for the test circuit in the test system, used to connect to the auxiliary control terminals on the top surface of the IGBT module. The second driving assembly 22 connects to and drives the probe plate 23 to descend until each probe is inserted into the corresponding auxiliary control terminal of the IGBT module, or to rise until each probe disengages from the corresponding auxiliary control terminal of the IGBT module.

[0045] The second support base 21 includes a module support base 211 and a probe support base 212. The module support base 211 has a plate-like structure and is arranged perpendicular to the horizontal plane. The second drive assembly 22 is mounted on the module support base 211, the probe support base 212 is mounted on the second drive assembly 22, and the probe plate 23 is mounted on the probe support base 212. Preferably, the probe plate 23 is detachably mounted on the probe support base 212.

[0046] In this embodiment, the second driving component 22 is a linear module, which is connected to and drives the probe support 212 to rise and fall.

[0047] The position of the probe plate 23 is set so that after the IGBT module on the tray 151 is connected to the first main interface 12 and the second main interface 13, the probe plate 23 is located directly above the IGBT module.

[0048] The first drive assembly 17, the second drive assembly 22, the pressure gauge, and each valve are all electrically connected to the host computer of the test system to receive instructions from the host computer.

[0049] Preferably, position sensors are installed on the housings of the first drive assembly 17 and the second drive assembly 22, respectively, to detect the position of the connector 16 and the position of the probe plate 23, which is equivalent to detecting the position of the IGBT module and the position of the probe plate 23.

[0050] In addition, the main circuit output within the fixture is led out through a large copper busbar 110, and adjacent large copper busbars 110 have sufficient insulation gaps to prevent discharge or creepage. At the same time, necessary insulation layers are provided for protection.

[0051] Based on the above structure, the working principle of this utility model is as follows: The IGBT module is placed on tray 151, and the host computer of the testing system issues the following command:

[0052] Step 1: Control the first drive component 17 to start. The first drive component 17 rotates according to the set speed, direction and time, driving the tray 151 to move a set distance, so that the main circuit input terminal, main circuit output terminal and the inlet and outlet of the two heat dissipation channels of the IGBT module on the tray 151 are accurately connected to the first main interface 12, the second main interface 13 and the two fluid interfaces 14 respectively.

[0053] Step 2: The host computer starts the second drive component 22 to rotate according to the set speed, direction and time, which drives the probe support 212 to move a set distance, so that the multiple auxiliary control terminals on the top surface of the IGBT module on the tray 151 are accurately connected to the multiple probes on the probe board 23.

[0054] Step 3: Perform an airtightness test on the host computer. Specifically, the host computer controls the shut-off valves and two three-way valves on the two fluid interfaces 14 to close the shut-off valves on the fluid inlet and outlet of the gas supply component. The gas supply component fills the heat dissipation channel with gas to the set pressure and then stops supplying pressure. If the pressure value read by the pressure gauge does not change within the specified range within the set time, it indicates that the airtightness of the heat dissipation channel is qualified; otherwise, the IGBT module being tested is unqualified.

[0055] Step 4: Water supply. Specifically, the host computer controls the shut-off valves and two check valves on the two fluid interfaces 14 to connect the water supply component to the fluid inlet, open the shut-off valve on the fluid outlet, and connect the fluid outlet and the water supply component. The water supply component supplies cooling water to the heat dissipation channel according to the set flow rate.

[0056] After completing the above process, the testing system performs relevant performance judgments based on the information received from the IGBT module. After the test, the testing system is first powered off. Then, the three-way valve connected to the fluid inlet switches to the gas supply component, which blows air into the heat dissipation channel, expelling the cooling water within. Next, the second drive assembly 22 and the first drive assembly 17 are started in reverse order, causing the IGBT module to first disconnect from the probe board 23, and then disconnect from the first main interface 12, the second main interface 13, and the fluid interface 14. Finally, the IGBT module is removed, a new IGBT module is inserted, and the above process is repeated.

[0057] Finally, it is necessary to state that the above embodiments are only used to further illustrate the technical solution of this utility model in detail, and should not be construed as limiting the scope of protection of this utility model. Any non-essential improvements and adjustments made by those skilled in the art based on the above content of this utility model shall fall within the scope of protection of this utility model.

Claims

1. An IGBT module performance test tool, characterized by, The IGBT module includes a main circuit input terminal, a main circuit output terminal, a heat dissipation channel, and multiple auxiliary control terminals. The main circuit input terminal, the main circuit output terminal, and the two inlets / outlets of the heat dissipation channel are located on the same side of the IGBT module. The auxiliary control terminals are located on the top surface of the IGBT module. The fixture includes a support frame (10) and at least one workstation (20) mounted on the support frame (10). Each workstation (20) can hold one IGBT module and connect the IGBT module to the test system. The workstation (20) includes a transverse docking part and a... The longitudinal docking part and the transverse docking part drive the IGBT module to move linearly in the horizontal plane, so that the main circuit input terminal, main circuit output terminal, heat dissipation channel and the corresponding interface of the test system on the station (20) of the IGBT module can be docked or disconnected. The longitudinal docking part includes a probe plate (23) and a second drive component (22). The probe plate (23) is provided with probes that dock with the auxiliary control terminal of the IGBT module. The second drive component (22) connects to and drives the probe plate (23) to rise and fall until the probe plate (23) docks or disconnects from the auxiliary control terminal of the IGBT module.

2. The tooling of claim 1, wherein: The transverse docking section includes a first support base (11) and a first main interface (12), a second main interface (13), a moving part, a connector (16), a first drive assembly (17), and two fluid interfaces (14) mounted on the first support base (11). The first main interface (12) and the second main interface (13) are interfaces of the test circuit in the test system. One is used to connect to the main circuit input terminal of the IGBT module, and the other is used to connect to the main circuit output terminal. The IGBT module to be tested is mounted on the moving part. The first drive assembly (17) is connected to the IGBT module via the connector (14). 6) Connect and drive the moving part to move back and forth, so that the main circuit input terminal and main circuit output terminal of the IGBT module on the moving part are inserted into the first main interface (12) and the second main interface (13), and at the same time, the two fluid interfaces (14) are respectively connected to the two inlets and outlets of the heat dissipation channel of the IGBT module, or the moving part moves to the point where the main circuit input terminal and main circuit output terminal of the IGBT module are disconnected from the first main interface (12) and the second main interface (13), and the two fluid interfaces (14) are respectively disconnected from the two inlets and outlets of the heat dissipation channel of the IGBT module.

3. The tooling of claim 2, wherein: The first support base (11) includes a first base plate (111) and a first horizontal plate (112). The first base plate (111) and the first horizontal plate (112) are connected in an L-shape. The first base plate (111) is parallel to the horizontal plane, and the first horizontal plate (112) is perpendicular to the first base plate (111). The first main interface (12), the second main interface (13) and two fluid interfaces (14) are provided on the first horizontal plate (112). The first base plate (111) is provided with two parallel and spaced slide rails (113). The length of the slide rails (113) is perpendicular to the length of the first horizontal plate (112), and the moving part moves along the length direction of the slide rails (113).

4. The tooling of claim 3, wherein: The first main interface (12) and the second main interface (13) are long strip-shaped interfaces with their length direction parallel to the horizontal plane. They are arranged in parallel and spaced apart. The first main interface (12) and the second main interface (13) are located between two fluid interfaces (14).

5. The tooling of claim 3, wherein: The moving part includes a tray (151), which is a plate-shaped structure. The tray (151) is parallel to the horizontal plane and slides on the slide rail (113). The top surface of the tray (151) is used to support and define the IGBT module.

6. The tooling of claim 5, wherein: The top surface of the tray (151) is provided with multiple limiting components, including at least two first limiting protrusions (152) and two limiting strips (153). The first limiting protrusions (152) are located at one end near the first horizontal plate (112), and the two limiting strips (153) are located at the two ends of the transverse direction of the tray (151), wherein the transverse direction refers to the direction perpendicular to the length of the slide rail (113).

7. The tooling of claim 5, wherein: The slide rail (113) extends out of the first base plate (111), the connector (16) passes through the two slide rails (113) and connects to the tray (151), the first drive assembly (17) is located below the first base plate (111), and the first drive assembly (17) connects to and drives the connector (16) to move linearly.

8. The tooling of claim 1, wherein: Two fluid interfaces (14) are provided, one as a fluid inlet and the other as a fluid outlet. The two fluid interfaces (14) are connected to an external gas supply component or water supply component. The gas supply component provides gas at a set pressure to the heat dissipation channel, and the water supply component provides cooling water to the heat dissipation channel.

9. The tooling of claim 1, wherein: The probes on the probe board (23) are the interfaces of the test circuit in the test system.

10. The tooling of any of claims 1-9, wherein: The longitudinal docking part also includes a second support base (21), and a second drive assembly (22) is mounted on the second support base (21). The second drive assembly (22) is a linear module.

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