Water passing and removing device for power module testing equipment

Abstract

A water passing and water removing device for power module testing equipment comprises a water passing mechanism, a water removing mechanism and a rotating disc, the rotating disc is provided with a water removing station and a testing station, and the rotating disc can be controlled to rotate and is used for exchanging a power module between the water removing station and the testing station. The water passing mechanism carries out water passing on the power module under the test working condition at the test station and pre-dewatering after the test is completed, and the dewatering mechanism carries out complete blow-dry dewatering on the power module at the dewatering station. According to the utility model, by integrating the water passing mechanism, the water removal mechanism and the turntable, the automatic flow of the power module from testing to water removal is realized. The rapid water removal of the heat dissipation surface of the power module is realized, so that the water passing and water removal efficiency of the power module test equipment is improved, and then the test efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to power semiconductor devices, in particular to a water passing and water removing 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 their core components - power electronic devices has become particularly important. Especially for the current third-generation power semiconductor devices and domestic power semiconductor devices, limited by different development stages of chips, technologies, processes, etc., they are in a critical period of technology iteration, process improvement, and product quality improvement. To ensure that these power electronic devices can exhibit good reliability and safety in terminal applications after leaving the factory, the test and screening link before product offline is particularly crucial. Since most power modules in power electronic devices are used in occasions with extremely high reliability requirements such as electric vehicles and grid connection devices, in recent years, the demand for working condition simulation tests before power module offline has increased rapidly.

[0003] In recent years, equipment for testing finished power modules has gradually emerged on the market. The existing technical solutions mainly adopt a three-station test and material handling process, namely a loading station, a water removing station, and a testing station in sequence. In this testing process, a translation picking and placing device is usually used to handle materials according to the following steps: First, the operator manually or with a robotic arm grabs the power module to be tested placed on the loading station and translates it to the testing station. At the testing station, the power module is pressed by a pneumatic or electric device onto a water-cooled fixture with a sealing ring below. Subsequently, the liquid cooling system controls the water passing in the water-cooled fixture at a certain temperature and flow rate to test the working performance of the power module at different water temperatures and water flow rates. After the test is completed, the water in the water-cooled fixture is released back to the water tank by the liquid cooling system through a water passing pipeline and pre-water removed by ventilation. After the pre-water removal is completed, the translation picking and placing device grabs and translates the tested module to the water removing station, and at the water removing station, further water blowing is performed by a water blowing structure below the fixture until the immersed heat dissipation surface of the power module is fully dried. Then, the next module to be tested on the loading station is grabbed and translated to the testing station, and then back to the water removing station, and the module that has been water removed is grabbed and translated back to the loading station to wait for unloading. In this way, the material handling, water passing, and water removing of the power module in the test equipment are realized.

[0004] However, the water passing structure of the existing device is a sealed cavity. During the pre-water removal process, the water that has passed through the water-cooled fixture under the test conditions needs to be released through the water pipe reflux first, and then air is introduced for preliminary water blowing. This technical solution is time-consuming and ineffective during pre-water removal. Due to the unsatisfactory pre-water removal effect, the water blowing structure at the water removal station needs a longer time to dry the immersed heat dissipation surface of the power module, thus affecting the overall test duration and limiting the production capacity under the fast test process. Therefore, it is necessary to improve the existing technology to improve the test efficiency and production capacity. Summary of the Invention

[0005] In view of the above-mentioned disadvantages existing in the current test material handling process, the present invention provides a water passing and water removing device for a power module test equipment, aiming to achieve water removal speed increase under the fast test process, so as to optimize the overall test process.

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

[0007] A water passing and water removing device for a power module test equipment, characterized by comprising:

[0008] A water passing mechanism for passing water to the power module and pre-water removing after the test is completed, at least including a water passing module, a water passing lifting structure and a pre-blowing air knife combination. Among them, the water passing lifting structure drives the water passing module to move up and down to realize the contact and separation with the power module, and the pre-blowing air knife combination is used for pre-drying the power module after the test is completed;

[0009] A water removing mechanism for performing a water removing operation to completely dry the pre-dried power module, at least including a blowing module and a water removing lifting structure. Among them, the water removing lifting structure can adjust the distance between the blowing module and the power module, and the blowing module has a plurality of blowing ports for blowing air.

[0010] Furthermore, it further includes a turntable. The turntable is provided with a water removing station and a test station, and the water passing mechanism is arranged below the test station, and the water removing mechanism is arranged below the water removing station. The turntable can be controlled to rotate for exchanging the power module between the water removing station and the test station.

[0011] Preferably, the water flow mechanism includes a water flow module, a water flow lifting structure, a pre-water blowing air knife assembly and a water flow base; the water flow base is composed of a long strip bracket and parallel long strip metal plates fixed on both sides of the bracket, the first pre-water blowing air knife assembly and the second pre-water blowing air knife assembly are respectively fixed on the long strip metal plates, the water flow lifting structure is fixed in the middle of the bracket, the lifting axis of the water flow lifting structure is connected to the water flow module, and the water flow lifting module can push up the water flow module so that the water flow module is close to the power module located at the test station.

[0012] When the power module at the test station is tested and drained by pulling down the lifting structure, the turntable rotates the tested power module to the top of the pre-water blowing air knife combination, where it is pre-dried by multiple groups of air knives and then rotated to the dewatering station for complete drying and water removal.

[0013] Preferably, an I-shaped water outlet is provided on the upper surface of the water flow module, a water inlet is provided on the bottom, and an external liquid cooling system is connected through the water inlet.

[0014] Preferably, the liquid cooling system passes water through the water inlet to the water flow module, and water with a certain controlled temperature and flow rate performs water cooling or heating test on the heat dissipation surface of the power module placed on the test station, and the outlet water flows back to the liquid cooling system through the water outlet of the water flow module.

[0015] Preferably, the dewatering mechanism comprises an air blowing module, a dewatering lifting structure and a dewatering base, the dewatering lifting structure is fixedly mounted on the dewatering base, and the lifting shaft of the dewatering lifting structure is connected to the air blowing module.

[0016] When the tested power module is transported from the testing station 5 to the dewatering station, the dewatering lifting mechanism can move up and down to adjust the distance between the blowing module and the heat dissipation surface of the power module, and the blowing module blows until the remaining water droplets on the heat dissipation surface of the power module are blown away.

[0017] Preferably, the dewatering base is a long strip base with a plurality of mounting holes on its surface for firmly fixing the entire dewatering mechanism at a desired position.

[0018] Preferably, the blowing module adopts a high-efficiency blowing element, and a plurality of blowing ports are provided on the upper surface.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0020] 1) By integrating the water supply mechanism, water removal mechanism and turntable, an automated process for the power module from testing to water removal is achieved. The introduction of the pre-blowing air knife combination and the blowing module enables efficient pre-drying and complete drying operations on the power module. Rapid water removal from the heat dissipation surface of the power module is realized, and this rapid water removal ability reduces the waiting time, enabling the testing equipment to be put into the next round of testing faster.

[0021] 2) The water supply lifting structure and the water removal lifting structure can precisely adjust the distance between the water supply module and the blowing module and the power module, ensuring the precise execution of the water-cooled testing and drying and water removal processes. After the water supply test is completed, the lifting module directly pulls down the water supply module, allowing the water that originally contacted the heat dissipation surface of the power module to be directly discharged, without the need to be released through the water pipe for reflux; the power module is rotated above the pre-blowing air knife combination, and the heat dissipation surface of the power module is pre-air dried by the air blown out by multiple air knives, accelerating the water removal; the lifting mechanism of the water removal mechanism can move up and down to adjust the distance between the blowing module and the heat dissipation surface of the power module, and the blowing module blows air through multiple blowing ports, optimizing the water removal effect.

[0022] 3) The design of the water removal station and the testing station on the turntable enables the device to process multiple power modules simultaneously, improving the utilization rate and flexibility of the equipment.

[0023] 4) Components such as the water supply module and the blowing module adopt a modular design, which is convenient for maintenance and replacement. This design enables the equipment to be flexibly configured and upgraded according to actual needs.

[0024] 5) The water in the liquid cooling system passes through the water inlet to supply water to the water supply module, and the water outlet then returns the water to the liquid cooling system, realizing the recycling of water, reducing water resource consumption and wastewater discharge. Description of the Drawings

[0025] Figure 1 is a perspective view of the water supply and water removal device for the power module testing equipment of the present utility model;

[0026] Figure 2 is a top view of the water supply and water removal device for the power module testing equipment of the present utility model;

[0027] Figure 3 is an exploded view of the water supply and water removal device for the power module testing equipment of the present utility model;

[0028] Figure 4 is a side view of the water supply and water removal device for the power module testing equipment of the present utility model;

[0029] Figure 5 is a schematic diagram of the module at the air knife position after the turntable 3 in the power module testing equipment of the present utility model rotates;

[0030] Figure 6 This is a schematic structural diagram of the water passing mechanism in the power module test equipment of the present utility model.

[0031] Figure 7 This is a schematic structural diagram of the water removal mechanism in the water passing and water removal device for the power module test equipment of the present utility model.

[0032] In the figure:

[0033] Water passing mechanism 1, water passing module 11, water passing lifting structure 12, pre-blowing water air knife combination 13, pre-blowing water air knife combination 14, water passing base 15

[0034] Water removal mechanism 2, air blowing module 21, water removal lifting structure 22, water removal base 23;

[0035] Rotary table 3, water removal station 4, test station 5. Specific embodiments

[0036] The following combines the accompanying drawings and embodiments to further describe the present utility model, but the protection scope of the present utility model should not be limited thereby.

[0037] Please refer to Figures 1-5 , as shown in the figure, a water passing and water removal device for a power module test equipment includes a water passing mechanism, a water removal mechanism 2, and a rotary table 3. The rotary table is provided with a water removal station 4 and a test station 5, and the water passing mechanism is arranged below the test station, and the water removal mechanism is arranged below the water removal station. The rotary table can be controlled to rotate for exchanging the power module between the water removal station and the test station. The water passing mechanism 1 conducts water passing under the test condition of the power module at the test station 5 and pre-water removal after the test is completed, and at least includes a water passing module, a water passing lifting structure, and a pre-blowing water air knife combination. Among them, the water passing lifting structure drives the water passing module to move up and down to realize contact with and separation from the power module. The water removal mechanism 2 completely dries the water of the power module at the water removal station 3, and at least includes an air blowing module and a water removal lifting structure. Among them, the water removal lifting structure can adjust the distance between the air blowing module and the power module, and the air blowing module has a plurality of air blowing ports for blowing air.

[0038] Please refer to Figure 6 , Figure 6It is a schematic structural diagram of the water passing mechanism in the water passing and removing device for the power module testing equipment of the present utility model. As shown in the figure, the water passing mechanism 1 of this embodiment includes a water passing module 11, a water passing lifting structure 12, a first pre-blowing water air knife combination 13, a second pre-blowing water air knife combination 14, and a water passing base 15. Among them, the water passing base 15 is composed of a long strip-shaped bracket and parallel long strip-shaped metal plates fixed on both sides of the bracket. The first pre-blowing water air knife combination 13 and the second pre-blowing water air knife combination 14 are respectively tightly fixed on the long strip-shaped metal plates by bolts. The water passing lifting structure 12 is fixed in the middle of the bracket. The lifting shaft of the water passing lifting structure 12 is connected to the water passing module 11. The water passing lifting module 12 can push up the water passing module 11 so that the water passing module 11 approaches the power module located at the test station 5. The upper surface of the water passing module 11 is provided with a "work" - shaped water outlet and is externally connected to a liquid cooling system (not shown in the figure) through a water inlet. The surface of the long strip-shaped bracket is provided with a plurality of mounting holes for firmly fixing the entire water passing mechanism 1 at the required position.

[0039] The liquid cooling system passes water through the water inlet to the water passing module 11. At this time, water with a certain controlled temperature and flow rate conducts water cooling or heating tests on the heat dissipation surface of the power module placed on the test station. The water outlet flows back through the water outlet of the water passing module 11. When the power module at the test station has completed the test, the water passing module 11 stops passing water, and the lifting module 12 directly pulls down the water passing module 11, so that the water originally in contact with the heat dissipation surface of the power module is directly discharged, without the need to be released through the water pipe for reflux, greatly improving the efficiency.

[0040] Figure 7 It is a schematic structural diagram of the water removing mechanism in the water passing and removing device for the power module testing equipment of the present utility model. As shown in the figure, the water removing mechanism 2 includes a blowing module 21, a water removing lifting structure 22, and a water removing base 23. The water removing base 23 is a long strip-shaped base, and its surface is provided with a plurality of mounting holes for firmly fixing the entire water removing mechanism at the required position. The water removing lifting structure 22 is fixedly installed on the water removing base 23. The lifting shaft of the water removing lifting structure 22 is connected to the blowing module 21. The upper surface of the blowing module 21 is provided with a plurality of blowing ports. When the power module after the test is transported from the test station 5 to the water removing station 4, the water removing lifting mechanism 22 can move up and down to adjust the distance between the blowing module 21 and the heat dissipation surface of the power module, and the blowing module 21 blows air through a plurality of blowing ports until the remaining water droplets on the heat dissipation surface of the power module are dried and removed completely.

[0041] The working principle of the present utility model is as follows:

[0042] The power module is installed on the turntable 3 equipped with a water removal station 4 and a testing station 5, and is driven by a pneumatic or electric device to rotate with the turntable 3. That is, after the power module on the testing station 5 is tested, the turntable 3 rotates to rotate it to the water removal station, and at the same time, the module to be tested that has been placed in place manually or by a robotic arm at the water removal station is replaced to the testing station. This process is repeated to achieve the exchange of the power module between the testing station and the water removal station.

[0043] When conducting a working condition test on the power module at the testing station, the water passing lifting module 12 jacks up the water passing module 11, and the liquid cooling system passes water through the water inlet of the water passing module 11. At this time, water with a certain controlled temperature and flow rate conducts water cooling or heating tests on the heat dissipation surface of the power module placed at the testing station, and the outlet water flows back through the outlet of the water passing module 11. When the power module at the testing station is tested, the water passing module 11 stops passing water, and the water passing lifting module 12 directly pulls down the water passing module 11, so that the water that originally contacted the heat dissipation surface of the power module is directly discharged, without the need to flow back and release through a water pipe, greatly improving the efficiency.

[0044] Next, through the controlled rotation of the turntable 3, the power module located at the testing station can be rotated above the pre-blowing air knives 13 and 14, and the heat dissipation surface of the power module is pre-air dried by the air output of multiple air knives.

[0045] Next, through the rotation of the turntable 3 and the work position replacement, the tested power module is transported from the testing station 5 to the water removal station 4. At this time, the water removal lifting mechanism 22 of the water removal mechanism 2 can move up and down to adjust the distance between the blowing module 21 and the heat dissipation surface of the power module, and the blowing module 21 blows air through multiple blowing ports until the remaining water droplets on the heat dissipation surface of the power module are completely dried.

Claims

1. A water-passing and water-removing device for power module testing equipment, characterized in that: include: The water supply mechanism is used for supplying water to the power module and pre-drying the water after the test is completed, and at least comprises a water supply module, a water supply lifting structure and a pre-water blowing air knife combination, wherein the water supply lifting structure drives the water supply module to move up and down to achieve contact and separation with the power module, and the pre-water blowing air knife combination is used to pre-dry the power module after the test; The dehydration mechanism is used for performing a dehydration operation on the pre-dried power module to completely dry it, and comprises at least an air blowing module and a dehydration lifting structure, wherein the dehydration lifting structure can adjust the distance between the air blowing module and the power module, and the air blowing module has multiple air ports for blowing.

2. The water passing and dewatering device for power module testing equipment according to claim 1, characterized in that: It also includes a turntable, on which a dewatering station and a testing station are provided, and the water supply mechanism is arranged below the testing station, and the dewatering mechanism is arranged below the dewatering station, and the turntable can be controlled to rotate so as to exchange the power module between the dewatering station and the testing station.

3. The water passing and dewatering device for power module testing equipment according to claim 1 or 2, characterized in that: The water flow mechanism includes a water flow module, a water flow lifting structure, a pre-water blowing air knife assembly and a water flow base; the water flow base is composed of a long strip bracket and parallel long strip metal plates fixed on both sides of the bracket, the first pre-water blowing air knife assembly and the second pre-water blowing air knife assembly are respectively fixed on the long strip metal plates, the water flow lifting structure is fixed in the middle of the bracket, the lifting shaft of the water flow lifting structure is connected to the water flow module, and the water flow lifting module can push up the water flow module so that the water flow module is close to the power module located at the test station.

4. The water removal device according to claim 2, characterized in that: When the power module at the test station is tested and drained by pulling down the lifting structure, the turntable rotates the tested power module to the top of the pre-water blowing air knife combination, where it is pre-dried by multiple groups of air knives and then rotated to the dewatering station for complete drying and water removal.

5. The water passing and dewatering device for power module testing equipment according to claim 1 or 2, characterized in that: The upper surface of the water flow module is provided with an "I"-shaped water outlet, the bottom is provided with a water inlet, and an external liquid cooling system is connected through the water inlet.

6. The water passing and dewatering device for power module testing equipment according to claim 5, characterized in that: The liquid cooling system passes water to the water flow module through the water inlet, and water with a certain controlled temperature and flow rate performs water cooling or heating test on the heat dissipation surface of the power module placed on the test station, and the outlet water flows back to the liquid cooling system through the water outlet of the water flow module.

7. The water passing and dewatering device for power module testing equipment according to claim 1, characterized in that: The dewatering mechanism comprises an air blowing module, a dewatering lifting structure and a dewatering base. The dewatering lifting structure is fixedly mounted on the dewatering base, and a lifting shaft of the dewatering lifting structure is connected to the air blowing module.

8. The water passing and dewatering device for power module testing equipment according to claim 7, characterized in that: When the tested power module is transported from the testing station (5) to the dewatering station, the dewatering lifting mechanism can move up and down to adjust the distance between the blowing module and the heat dissipation surface of the power module, and the blowing module blows air until the remaining water droplets on the heat dissipation surface of the power module are blown away.

9. The water passing and dewatering device for power module testing equipment according to claim 7 or 8, characterized in that: The dewatering base is a long strip base with a plurality of mounting holes on its surface for firmly fixing the entire dewatering mechanism at a desired position.

10. The water passing and dewatering device for power module testing equipment according to claim 7 or 8, characterized in that: The blowing module adopts a high-efficiency blowing element, and a plurality of blowing ports are arranged on the upper surface.

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