Power end crimping device for power module test equipment

Abstract

The utility model discloses a power end crimping device for power module test equipment. The power end crimping device comprises a crimping suite and a three-dimensional position adjusting mechanism, the crimping suite comprises an air cylinder, a crimping conductive terminal and a suite fixing clamp, the crimping conductive terminal is composed of an upper conductive block and a lower conductive block which are parallel to each other, a power terminal of the power module is placed between the upper conductive block and the lower conductive block, and the air cylinder is connected with the crimping conductive terminal and used for controlling pressing and loosening of the crimping conductive terminal; therefore, double-sided flat crimping of the power terminal of the power module is realized. The suite fixing clamp is fixedly connected with the three-dimensional position adjusting mechanism, and the positions of the crimping suite in the vertical direction and the horizontal plane are adjusted by controlling the movement of the three-dimensional position adjusting mechanism. According to the utility model, through a double-sided flat crimping technology, a three-dimensional position adjustment mechanism and an automatic control means, problems existing in a traditional power module test device are effectively solved, the product quality is improved, the maintenance cost is reduced, and the test efficiency and the production capacity are improved.

Description

Technical Field

[0001] The utility model belongs to power semiconductor devices, and particularly relates to a power terminal crimping device for a power module test equipment. Background Art

[0002] With the rapid increase in the demand for power electronic devices in the fields of new energy power generation, electric vehicles, rail transit, data centers, energy storage, charging piles, etc. in modern society, the reliability of power electronic devices, which are the core components, becomes particularly important. Especially at present, the third-generation power semiconductor devices and domestic power semiconductor devices are limited by different development stages of chips, technologies, processes, etc., and are all in the critical period of technology iteration, process improvement, and product quality improvement. It is necessary to conduct test screening before product offline to ensure the reliability and safety of power electronic devices in terminal applications after leaving the factory. Considering that most power modules in power electronic devices are applied in occasions with extremely high reliability requirements such as electric vehicles and grid connection devices, the demand for working condition simulation tests before power module offline has increased sharply in recent years.

[0003] In recent years, devices for testing finished power modules have gradually emerged on the market. When these devices perform automated tests on the power modules to be tested, they mainly use pneumatic or electric methods to press the external conductive terminals from above to tightly press the power terminals of the module to be tested on one side, and then start the power-on test. After the test is completed, the pressed conductive terminals are lifted, and the module to be tested is taken away, and the automatic test is carried out repeatedly in this way.

[0004] In the existing device, the method of pressing the external conductive terminals from above to tightly press the power terminals on one side is prone to uneven contact surfaces of the pressed conductive terminals under long-term reciprocating pressing and lifting crimping tests, which in turn causes indentations on the contact surfaces of the power terminals of the power module, affecting the product quality acceptance. For this reason, it is necessary to frequently replace the pressed conductive terminals, and replacing them as accessories not only increases costs but also increases the equipment maintenance time. Summary of the Utility Model

[0005] To overcome the problem that the uneven contact surface of the pressed conductive terminal caused by the single-sided pressing used in the existing power module test equipment affects the product quality, the utility model provides a power terminal crimping device for a power module test equipment, which adopts a double-sided flat crimping technology to realize double-sided pressing of the power terminals through upper and lower conductive blocks, effectively avoiding the problem of uneven contact surfaces, and aims to solve the shortcomings of the existing power terminal crimping methods for power modules.

[0006] To achieve the above object, the technical solution of the utility model is as follows:

[0007] A power terminal crimping device for a power module test equipment is characterized in that it includes a crimping kit and a three-dimensional position adjustment mechanism;

[0008] The crimping kit includes a cylinder, a crimping conductive terminal, and a kit fixing fixture. Among them, the crimping conductive terminal is composed of an upper block conductive block and a lower block conductive block that are parallel to each other. A power terminal of the power module is placed between the two. The cylinder is connected to the crimping conductive terminal and is used to control the tightening and loosening of the crimping conductive terminal, so as to achieve double-sided flat crimping of the power terminal of the power module. The cylinder and the crimping conductive terminal are both fixed on the kit fixing fixture, and the kit fixing fixture is fixedly connected to the three-dimensional position adjustment mechanism. By controlling the movement of the three-dimensional position adjustment mechanism, the position of the crimping kit in the vertical and horizontal planes can be adjusted.

[0009] Preferably, the three-dimensional position adjustment mechanism includes an up-and-down translation mechanism, a first horizontal translation mechanism, and a second horizontal translation mechanism. The up-and-down translation mechanism is used to adjust the position of the crimping kit in the vertical direction, and the first and second horizontal translation mechanisms are used to adjust the position of the crimping kit on the horizontal plane.

[0010] Preferably, the moving end of the up-and-down translation mechanism is connected to the fixed end of the first horizontal translation mechanism, the moving end of the first horizontal translation mechanism is connected to the fixed end of the second horizontal translation mechanism, and the moving end of the second horizontal translation mechanism is connected to the kit fixing fixture.

[0011] Furthermore, it further includes a test equipment machine table. The three-dimensional position adjustment mechanism is arranged on the test equipment machine table and is used to align the crimping kit with the power terminal of the power module to be tested.

[0012] Furthermore, the cylinder is controlled in a pneumatic or electric manner to achieve the tightening and loosening of the crimping conductive terminal.

[0013] Preferably, the material of the crimping conductive terminal has good electrical conductivity and wear resistance to ensure the stability and reliability during long-term use.

[0014] Furthermore, it further includes a control system, which is used to control the coordinated work of the three-dimensional position adjustment mechanism and the cylinder to achieve automatic crimping and power-on testing of the power module.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1) By adopting the double-sided flat crimping technology, the double-sided tightening of the power terminal is achieved through the upper and lower conductive blocks, effectively avoiding the problems of uneven contact surface and indentation caused by the traditional single-sided tightening method, thereby improving the product quality and acceptance pass rate.

[0017] 2) A three-dimensional position adjustment mechanism is introduced, including a vertical translation mechanism and two horizontal translation mechanisms, which can precisely adjust the position of the crimping kit in the vertical and horizontal planes to better align with the power terminals of the power module under test, improving the accuracy and efficiency of the test.

[0018] 3) The entire crimping process is automatically controlled pneumatically or electrically, reducing the intervention of manual operation, improving the automation level and production efficiency of the test. This makes the entire crimping and testing process faster and more accurate, enhancing the test efficiency and production capacity.

[0019] 4) Since the occurrence of uneven contact surfaces and indentation problems of the downward-pressing conductive terminals is reduced, the maintenance cost and time caused by frequent replacement of the downward-pressing conductive terminals are also reduced. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the power terminal crimping device of the power module test equipment of the present utility model.

[0021] Figure 2 is a schematic structural diagram of the crimping kit in the power terminal crimping device of the power module test equipment of the present utility model. Detailed Embodiment

[0022] The present utility model will be further described below in conjunction with the drawings and embodiments, but the protection scope of the present utility model should not be limited thereby.

[0023] Please refer to Figure 1 , Figure 1 is a schematic structural diagram of the power terminal crimping device of the power module test equipment of the present utility model. As shown in the figure, a power terminal crimping device for a power module test equipment includes three sets of translation mechanisms and a set of crimping kits, namely, a vertical translation mechanism 1, a crimping kit 2, a first horizontal translation mechanism 3, and a second horizontal translation mechanism 4. Among them, the crimping kit 2 is composed of a cylinder 21, a crimping conductive terminal 22, and a kit fixing clamp 23; the vertical translation mechanism 1, the first horizontal translation mechanism 3, and the second horizontal translation mechanism 4 are controlled pneumatically or electrically, and the crimping kit 2 fixed under the three sets of translation mechanisms by the kit fixing clamp 23 can be adjusted in position in the vertical and horizontal planes to align with the power terminals of the power module under test on the power test equipment table; by controlling the cylinder 21, the upper and lower conductive blocks of the crimping conductive terminal 22 can be tightly pressed or loosened up and down in parallel, so as to realize double-sided flat crimping and loosening of the power terminals of the power module.

[0024] The working principle of the present utility model is as follows: By pneumatic or electric means to control the up-and-down translation mechanism 1, the first horizontal translation mechanism 3 and the second horizontal translation mechanism 4, the crimping kit 2 fixed under the three sets of translation mechanisms by the kit fixing fixture 23 can be adjusted in position in the up-and-down and horizontal planes so as to align with the power terminals of the power module to be tested on the power test equipment table. When the power terminals of the power module are aligned and placed into the opening of the crimping conductive terminal 22 of the crimping kit 2, the upper and lower conductive blocks of the crimping conductive terminal 22 can be tightly pressed parallel up and down by controlling the cylinder 21, thereby realizing the double-sided flat crimping of the power terminals of the power module. Then, the test equipment starts to be powered on for testing. After the test is completed, the upper and lower conductive blocks of the crimping conductive terminal 22 can be translated and loosened up and down by controlling the cylinder 21, and the module to be tested is taken away. In this way, the crimping and power-on testing of the power module in the test equipment are realized reciprocally.

[0025] The present utility model effectively solves the problems existing in the traditional power module test equipment through the double-sided flat crimping technology, the three-dimensional position adjustment mechanism and the automatic control means, improves the product quality, reduces the maintenance cost, and enhances the test efficiency and production capacity.

Claims

1. A power terminal crimping device for a power module testing device, characterized in that: Includes crimping kit and three-dimensional position adjustment mechanism; The crimping kit includes a cylinder, a crimping conductive terminal and a kit fixing fixture, wherein the crimping conductive terminal is composed of an upper conductive block and a lower conductive block parallel to each other, and the power terminal of the power module is placed between the two blocks. The cylinder is connected to the crimping conductive terminal and is used to control the tightening and loosening of the crimping conductive terminal, thereby realizing double-sided flat crimping of the power terminal of the power module; the cylinder and the crimping conductive terminal are both fixed on the kit fixing fixture, and the kit fixing fixture is fixedly connected to the three-dimensional position adjustment mechanism, and the position of the crimping kit in the upper and lower and horizontal planes is adjusted by controlling the movement of the three-dimensional position adjustment mechanism.

2. The power terminal crimping device for power module testing equipment according to claim 1, characterized in that: The three-dimensional position adjustment mechanism includes an up-and-down translation mechanism, a first horizontal translation mechanism and a second horizontal translation mechanism. The up-and-down translation mechanism is used to adjust the position of the crimping kit in the vertical direction, and the first and second horizontal translation mechanisms are used to adjust the position of the crimping kit on the horizontal plane.

3. The power terminal crimping device for power module testing equipment according to claim 2, characterized in that: The movable end of the up-and-down translation mechanism is connected to the fixed end of the first horizontal translation mechanism, the movable end of the first horizontal translation mechanism is connected to the fixed end of the second horizontal translation mechanism, and the movable end of the second horizontal translation mechanism is connected to the kit fixing fixture.

4. The power terminal crimping device for power module testing equipment according to claim 1 or 2, characterized in that: It also includes a test equipment platform, and the three-dimensional position adjustment mechanism is arranged on the test equipment platform, and is used to align the crimping kit with the power terminal of the power module under test.

5. The power terminal crimping device for power module testing equipment according to claim 1, characterized in that: The cylinder is controlled pneumatically or electrically to achieve the compression and release of the crimped conductive terminal.

6. The power terminal crimping device for power module testing equipment according to claim 1 or 2, characterized in that: It also includes a control system for controlling the coordinated work of the three-dimensional position adjustment mechanism and the cylinder to achieve automatic crimping and power-on testing of the power module.

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