Power end integral crimping device for power module test equipment

Abstract

A power end integral crimping device for power module test equipment comprises an upper pressing rod and a lower pressing rod which are parallel to each other, are bow-shaped and are used for accommodating a to-be-tested power component; the first pusher and the second pusher are controlled to drive the first mechanical execution mechanism and the second mechanical execution mechanism, so that the upper pressing rod and the lower pressing rod are driven to move relatively, and the power terminal of the to-be-tested power component between the upper pressing rod and the lower pressing rod is subjected to integral crimping. According to the utility model, integral crimping is adopted, so that uniform stress of the power terminal in the crimping process is ensured, local stress concentration is avoided, and the reliability of connection is enhanced.

Description

Technical Field

[0001] The utility model belongs to a power semiconductor device, in particular to a power end integral crimping device for power module testing equipment. Background Art

[0002] With the surge in demand for power electronic equipment in the fields of new energy power generation, electric vehicles, rail transportation, data centers, energy storage, charging piles, etc. in modern society, the reliability of its core components, namely power electronic devices, has become particularly important. In particular, the current third-generation power semiconductor devices and domestically produced power semiconductor devices are limited by the different development stages of chips, technologies, processes, etc., and are in a critical period of technology iteration, process improvement, and product quality improvement. Pre-production testing and screening are required to ensure the reliability and safety of power electronic devices in terminal applications after leaving the factory. Considering that power modules in power electronic devices are mostly used in electric vehicles, grid-connected devices and other occasions with extremely high reliability requirements, the demand for working condition simulation testing of power modules before they are produced has surged in recent years.

[0003] In recent years, equipment specifically designed for testing finished power modules has gradually emerged on the market. Existing automated testing solutions primarily use pneumatic or electric pressure to independently and single-sidedly compress external conductive terminals and power terminals from above, before powering on and testing begins. After the test is complete, the conductive terminals are lifted, and the module under test is removed, repeating the automated testing process.

[0004] Existing devices use a method of independently and single-sidedly pressing down on external conductive terminals and power terminals from above. This repeated pressing and lifting can easily lead to uneven contact surfaces on multiple terminals, resulting in indentations on the power module's power terminal contact surfaces, impacting product quality acceptance. This necessitates frequent replacement of these terminals, which increases both cost and maintenance time. Utility Model Content

[0005] In order to overcome the problem that the contact surface of the pressed-down conductive terminal is uneven due to the single-sided pressing adopted by the power module testing equipment in the above-mentioned prior art, thereby affecting product quality, the utility model provides an integrated power end crimping device for power module testing equipment, which adopts double-sided flat crimping technology to achieve double-sided pressing of the power terminal through the upper and lower conductive blocks, effectively avoiding the problem of uneven contact surface, and aims to solve the shortcomings of the existing power terminal crimping method of the power module.

[0006] To achieve the above objectives, the technical solutions of the present invention are as follows:

[0007] A power terminal integral crimping device for power module testing equipment is characterized in that it includes:

[0008] Two upper and lower pressure rods placed parallel to each other, both of which are in a bow shape and are used to accommodate the power component to be tested;

[0009] The upper and lower pressure rods are provided with a first mechanical actuator and a second mechanical actuator at both ends, respectively. The first mechanical actuator is connected to the first pusher, and the second mechanical actuator is connected to the second pusher.

[0010] By controlling the first pusher and the second pusher to drive the first mechanical actuator and the second mechanical actuator, the upper and lower pressure rods are driven to move relative to each other, and the power terminals of the power component to be tested between the upper and lower pressure rods are integrally crimped.

[0011] Preferably, an upper high-temperature pressing strip and a lower high-temperature pressing strip are respectively provided on opposite surfaces of the upper pressing rod and the lower pressing rod, for heat-insulating and insulating the power terminals during the crimping process.

[0012] Furthermore, a control unit is included for controlling the movement of the first pusher and the second pusher by pneumatic or electric means to achieve the tightening or loosening of the upper and lower pressure rods, specifically including:

[0013] When the power terminal of the power component is aligned and moved between the upper pressure rod and the lower pressure rod, the control unit starts the first pusher and the second pusher to drive the first mechanical actuator and the second mechanical actuator to close the upper pressure rod and the lower pressure rod to perform integral crimping on the power terminal, and the test equipment starts power-on testing;

[0014] After the test is completed, the control unit controls the first pusher and the second pusher again to release the upper pressing rod and the lower pressing rod, thereby allowing the tested power component to be removed for the next crimping test.

[0015] Preferably, the upper and lower high-temperature pressure strips are made of high-temperature insulating materials, which can isolate the heat transfer between the upper and lower pressure rods during the crimping process to ensure a good electrical and mechanical connection between the power terminal and the connecting component.

[0016] Furthermore, it also includes a detection unit, which is connected to the upper pressing rod and the lower pressing rod respectively, and is used to detect the crimping force and / or crimping temperature during the crimping process to ensure that the crimping quality meets the preset standards.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1) Multiple parts of the power terminal can be crimped simultaneously, significantly improving testing efficiency. The integrated upper and lower parallel compression mechanism and control method improves the power terminal crimping method of the power module in the test equipment. This effectively solves the problem of uneven contact surface of the conductive terminal when pressing down on the existing technical solutions, thereby improving the crimping effect and efficiency of the power terminal contact surface of the power module. The integrated crimping ensures uniform force on the power terminal during the crimping process, avoiding local stress concentration, thereby enhancing the reliability of the connection.

[0019] 2) Introducing thermal insulation elements during the crimping process, the power terminals are insulated by high-temperature pressure strips, improving electrical and mechanical connection performance.

[0020] 3) Pneumatic or electric control allows the pusher to be flexibly adjusted according to actual needs, adapting to the needs of different power module tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a structural schematic diagram of a power terminal crimping device for power module testing equipment.

[0022] Figure 2 The utility model is a structural schematic diagram of a crimping kit in a power terminal crimping device for power module testing equipment.

[0023] Figure 3 The utility model is a three-dimensional diagram of the integral crimping state of the power terminal crimping device used for power module testing equipment.

[0024] Figure 4 The utility model is a side view of the integral crimping state of the power terminal crimping device used for power module testing equipment. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but this should not limit the scope of protection of the present invention.

[0026] See also Figure 1 , Figure 1 This is a structural schematic diagram of the power end integral crimping device for power module testing equipment of the utility model. As shown in the figure, an integral crimping device for the power end of power module testing equipment includes a first pusher 1 and a second pusher 2, a first mechanical actuator 3 and a second mechanical actuator 4, an upper pressure rod 5 and a lower pressure rod 6, an upper high-temperature pressure strip 7 and a lower high-temperature pressure strip 8.

[0027] When the power terminals 10 of the power component 9 are aligned and moved into the upper and lower pressure rods, the pushers 1 and 2 are controlled by pneumatic or electric means to drive the mechanical actuators 3 and 4, which in turn push the upper and lower pressure rods 5 and 6 to integrally crimp the power terminals placed in the high-temperature pressure strips 7 and 8 of the upper and lower pressure rods. Then, the test equipment starts to be powered on for testing. Figure 3 、 Figure 4 In the example shown, after the power terminals of the power module 10 under test are aligned with the power terminals of the power component 9 and inserted, they are integrally crimped together using upper and lower pressure rods, achieving a reliable electrical connection between the power terminals of the power component 9 and the power terminals of the power module 10 under test. The power component 9 then performs a power-on test on the connected power module under test, powered by an external power source or its own power supply. At this point, the power module 10 under test is connected to the test load in the test equipment via its output power terminals on the other side, and this connection method can also be similarly adopted using the device of the present invention.

[0028] After the test is completed, the pushers 1 and 2 are controlled to loosen the upper and lower pressure rods 5 and 6, and the module to be tested is removed. The power module power test is repeated in this way. Under high-power operation, the crimping device ensures reliable power terminal crimping connection.

[0029] Furthermore, the present invention further comprises a detection unit, which is respectively connected to the upper pressing rod 5 and the lower pressing rod 6, and is used to detect the crimping force and / or the crimping temperature during the crimping process to ensure that the crimping quality meets the preset standards.

[0030] The example diagram only shows an example of crimping a power component containing several power terminals. Similar technical solutions can be used for crimping other power components of different packaging types containing single or multiple power terminals.

[0031] This utility model improves the crimping method for power module power terminals in test equipment through an integrated upper and lower parallel pressing mechanism and control method. This effectively solves the problem of uneven contact surfaces when pressing down on conductive terminals, which is common in existing solutions. The integrated crimping ensures uniform force distribution across the power terminals during the crimping process, avoiding localized stress concentration and thus enhancing connection reliability. This in turn improves the crimping effect and efficiency of the power module's power terminal contact surfaces. Furthermore, multiple parts of the power terminal can be crimped simultaneously, significantly improving testing efficiency.

Claims

1. A power terminal integral crimping device for power module testing equipment, characterized in that: include: Two upper pressing rods (5) and lower pressing rods (6) placed parallel to each other, the upper pressing rods (5) and lower pressing rods (6) both being in a bow shape and being used to accommodate a power component (9) to be measured; A first mechanical actuator (3) and a second mechanical actuator (4) are respectively provided at both ends of the upper pressure rod (5) and the lower pressure rod (6); the first mechanical actuator (3) is connected to the first pusher (1), and the second mechanical actuator (4) is connected to the second pusher (2); By controlling the first pusher (1) and the second pusher (2) to drive the first mechanical actuator (3) and the second mechanical actuator (4), the upper pressing rod (5) and the lower pressing rod (6) are driven to move relative to each other, and the power terminals of the power component to be tested (9) between the upper pressing rod (5) and the lower pressing rod (6) are integrally crimped.

2. The power terminal integrated crimping device for power module testing equipment according to claim 1, characterized in that: An upper high-temperature pressure strip (7) and a lower high-temperature pressure strip (8) are respectively provided on opposite surfaces of the upper pressure rod (5) and the lower pressure rod (6), and are used to insulate and heat the power terminal during the crimping process.

3. The power terminal integral crimping device for power module testing equipment according to claim 1 or 2, characterized in that: The invention also includes a control unit for controlling the movement of the first pusher (1) and the second pusher (2) by pneumatic or electric means to achieve the tightening or loosening of the upper pressure rod (5) and the lower pressure rod (6), specifically comprising: When the power terminal of the power component (9) is aligned and moved between the upper pressure rod (5) and the lower pressure rod (6), the control unit starts the first pusher (1) and the second pusher (2), drives the first mechanical actuator (3) and the second mechanical actuator (4), closes the upper pressure rod (5) and the lower pressure rod (6), performs integral crimping on the power terminal, and the test equipment starts power-on testing; After the test is completed, the control unit controls the first pusher (1) and the second pusher (2) again to loosen the upper pressing rod (5) and the lower pressing rod (6), thereby allowing the tested power component (9) to be removed for the next crimping test.

4. The power terminal integrated crimping device for power module testing equipment according to claim 2, characterized in that: The upper high-temperature pressure strip (7) and the lower high-temperature pressure strip (8) are made of high-temperature insulating material and can isolate the heat transfer between the upper pressure rod (5) and the lower pressure rod (6) during the crimping process to ensure that the power terminal and the connecting component are electrically and mechanically connected.

5. The power terminal integrated crimping device for power module testing equipment according to claim 1, characterized in that: It also includes a detection unit, which is connected to the upper pressing rod (5) and the lower pressing rod (6) respectively, and is used to detect the pressing force and / or the pressing temperature during the pressing process to ensure that the pressing quality meets the preset requirements.

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