IGBT (Insulated Gate Bipolar Translator) water-cooling testing device

Abstract

The invention discloses an IGBT water cooling test device, which comprises a test device and a liquid circulation box, the test device comprises a water tank and a plurality of test units, the water tank comprises a box body and a switching valve arranged on the box body, a water inlet pipe and a water outlet pipe are arranged in the box body, and the water inlet pipe and the water outlet pipe are respectively communicated with the liquid circulation box. The test unit comprises a water cooling seat and a mounting seat used for mounting an IGBT to be tested, the water cooling seat comprises a water tank, a water inlet and a water outlet, the water inlet and the water outlet are arranged at two ends of the water tank, the mounting seat is arranged at the upper end of the water tank, the water outlet is communicated with the water outlet pipe, the switching valve comprises an inlet, a first outlet and a second outlet, and the first outlet and the second outlet are respectively communicated with the inlet. The first outlet is communicated with the water inlet of the water cooling seat, and the second outlet is communicated with the water outlet pipe. When the hydraulic pressure of a certain water cooling seat is changed, the flow of other water cooling seats is not easy to change.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor testing, and particularly to an IGBT water-cooling testing device. Background Art

[0002] During the aging test of IGBTs, due to the large amount of heat generated by the IGBTs to be tested, water cooling is usually required to control the temperature. Generally, one or more water-cooling seats (liquid cooling cabinets) are set for one IGBT to control the temperature. During the test, the cooling rate of the IGBTs to be tested is usually controlled by controlling the water flow rate in the water-cooling seat, and the water flow rate in the water-cooling seat is usually controlled by the water pressure.

[0003] However, if the valve for the water inlet of a certain water-cooling seat is closed, since the total water inlet pressure remains unchanged, the water pressure of the closed path is evenly distributed to the other water-cooling seats, resulting in a change in the water flow rate of the other water-cooling seats, which is not conducive to controlling the temperature of the IGBTs to be tested. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide an IGBT water-cooling testing device, which is not likely to cause a change in the water flow rate of other water-cooling seats when the hydraulic pressure of a certain water-cooling seat changes, and is conducive to controlling the temperature of the IGBTs to be tested.

[0005] The purpose of the present invention is achieved by the following technical solutions: An IGBT water-cooling testing device includes a testing device and a liquid circulation tank. The testing device includes a water tank and a plurality of testing units. The water tank includes a tank body and a switching valve arranged on the tank body. An inlet pipe and an outlet pipe are arranged in the tank body. The inlet pipe and the outlet pipe are respectively communicated with the liquid circulation tank. The testing unit includes a water-cooling seat and a mounting seat for mounting the IGBT to be tested. The water-cooling seat includes a water tank and a water inlet and a water outlet arranged at both ends of the water tank. The mounting seat is arranged at the upper end of the water tank. The water outlet is communicated with the outlet pipe. The switching valve includes an inlet, a first outlet and a second outlet. The first outlet and the second outlet are respectively communicated with the inlet. The water inlet is communicated with the inlet pipe. The first outlet is communicated with the water inlet of the water-cooling seat. The second outlet is communicated with the outlet pipe.

[0006] Preferably, the switching valve includes a rotating handle. When the rotating handle turns to the first outlet, the first outlet discharges water. When the rotating handle turns to the second outlet, the second outlet discharges water.

[0007] Preferably, the liquid circulation tank is a water circulation tank. The water tank further includes a flow meter and a stop valve provided on the tank body. The flow meter is connected between the inlet and the water inlet pipe, and the stop valve is connected between the water outlet and the water outlet pipe.

[0008] Preferably, the test unit, the switching valve, the flow meter, and the stop valve are connected in one-to-one correspondence through pipelines. Connection ports for water inlet and outlet are provided on both the water inlet pipe and the water outlet pipe, and the ends of the water inlet pipe and the water outlet pipe away from the water circulation tank are closed.

[0009] Preferably, the test unit further includes a cover plate. The cover plate is arranged between the mounting seat and the water cooling seat. A middle hole communicating with the water tank is provided in the middle of the cover plate, and the mounting seat is connected to the cover plate through the middle hole.

[0010] Preferably, signal pins are arranged on the side of the mounting seat, and heat dissipation teeth are arranged at the lower end of the mounting seat. The heat dissipation teeth extend into the water tank through the middle hole.

[0011] Preferably, the test device further includes an upper cabinet and a lower cabinet. A plurality of test units are arranged in the upper cabinet, and the water tank is arranged in the lower cabinet.

[0012] Preferably, the test device further includes a partition plate. The partition plate is arranged between the upper cabinet and the lower cabinet. A plurality of test units are arranged on the partition plate, and a plurality of through holes facilitating the passage of pipelines are provided on the partition plate.

[0013] Preferably, the test unit further includes a water temperature sensor and a connecting column. The water temperature sensor passes through the water cooling seat and extends into the water tank. The connecting column is arranged at the lower end of the water cooling seat, and the water cooling seat is fixedly connected to the partition plate through the connecting column.

[0014] Preferably, both the upper cabinet and the lower cabinet are provided with cabinet doors. A handle and a connecting piece are further provided on the water tank, and the water tank is fixed in the lower cabinet through the connecting piece.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The IGBT water-cooling test device disclosed in the present application is characterized in that a switching valve is arranged on the water tank, and the switching valve includes a first outlet and a second outlet. When the first outlet of the switching valve is turned on, liquid enters the water-cooling seat connected to the switching valve, and the liquid flow in the water-cooling seat increases, so that the IGBT to be tested can be cooled down quickly. When the second outlet of the switching valve is turned on, liquid does not enter the water-cooling seat connected to the switching valve, and the hydraulic pressure of this line causes the liquid to enter the switching valve from the inlet of this line, and then flow out from the second outlet of this line to the water outlet pipe without distributing the hydraulic pressure to the water-cooling seats of other lines, thereby not affecting the flow of the water-cooling seats of other lines, and thus facilitating the control of the temperature of the IGBT to be tested.

[0016] In addition, when the second outlet of the switching valve is connected, the water cooling seat connected to the switching valve discharges liquid, which can make the water cooling seat liquid-free or liquid-less, and is also conducive to maintaining the circuit test unit and replacing a new IGBT to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the IGBT water cooling test device of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the water tank of the present invention; Figure 3 It is a schematic diagram of the structure after the components of the water tank of the present invention are connected with the water cooling seat; Figure 4 It is a three-dimensional structural schematic diagram of the water tank of the present invention from another perspective; Figure 5 is a schematic diagram of the three-dimensional structure of the test unit of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the water cooling seat and the mounting seat; Figure 7 It is a schematic diagram of the planar structure of the water cooling seat; Figure 8 for Figure 7 Sectional view at AA in the middle; Figure 9 It is a schematic diagram of the three-dimensional structure of the switching valve of the present invention.

[0018] In the figure: 100, IGBT water-cooling test device; 10, test device; 11, upper cabinet; 12, lower cabinet; 20, water tank; 21, water inlet pipe; 22, water outlet pipe; 221, connection port; 23, switching valve; 231, inlet; 232, first outlet; 233, second outlet; 234, rotating handle; 24, box body; 25, flowmeter; 26, stop valve; 27, handle; 28, connecting piece; 30, test unit; 31, water-cooling seat; 311, connecting column; 312, water inlet; 313, water outlet; 314, water tank; 32, partition board; 321, perforation; 33, mounting seat; 331, signal pin; 332, heat dissipation teeth; 34, cover plate; 40, liquid circulation tank; 41, pipeline; 50, IGBT to be tested. Detailed implementation mode

[0019] In order to more clearly understand the specific technical solutions, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0021] As Figures 1 - 8 shown, an IGBT water-cooling test device 100 disclosed in the present application includes a test device 10 and a liquid circulation tank 40. The test device 10 includes a water tank 20 and a plurality of test units 30. The water tank 20 includes a box body 24 and a switching valve 23 provided on the box body 24. A water inlet pipe 21 and a water outlet pipe 22 are provided in the box body 24. The water inlet pipe 21 and the water outlet pipe 22 are respectively communicated with the liquid circulation tank 40. The test unit 30 includes a water-cooling seat 31 and a mounting seat 33 for mounting the IGBT 50 to be tested. The water-cooling seat 31 includes a water tank 314 and a water inlet 312 and a water outlet 313 provided at both ends of the water tank 314. The mounting seat 33 is provided at the upper end of the water tank 314. The water outlet 313 is communicated with the water outlet pipe 22. As Figure 9As shown, the switching valve 23 includes an inlet 231, a first outlet 232 and a second outlet 233. The first outlet 232 and the second outlet 233 are respectively connected to the inlet 231, the first outlet 232 is connected to the water inlet 312 of the water cooling seat 31, and the second outlet 233 is connected to the water outlet pipe 22.

[0022] In the above embodiment, if Figure 3 As shown in the figure (the thin black line is a pipe), the liquid in the liquid circulation box 40 flows into the switching valve 23 through the water inlet pipe 21. When the first outlet of the switching valve 23 is connected, the water inlet 312 of the water cooling seat 31 connected to the switching valve 23 flows into the water tank 314. At the same time, the liquid in the water tank 314 flows into the water outlet pipe 22 from the water outlet 313 and flows back into the liquid circulation box 40. The IGBT to be tested on the water cooling seat 31 is cooled quickly. When a certain switching valve 23 (for example, the A-way switching valve) is turned on, the liquid in the water cooling seat 31 is turned on. When the second outlet 233 of the switching valve (not shown) is turned on, the water inlet 312 connected to the A-way switching valve does not enter the liquid, and the liquid in the A-way switching valve directly flows into the water outlet pipe 22 from the second outlet 233, and the liquid then flows back to the liquid circulation box 40 from the water outlet pipe 22 to form a complete loop without being hydraulically distributed to the water cooling seat 31 of the B-way or C-way, thereby not affecting the flow of the water cooling seat 31 of the B-way or C-way, and at the same time, the IGBT to be tested on the A-way water cooling seat 31 is slowly cooled down until it is kept warm, which is beneficial to control the temperature of the IGBT to be tested.

[0023] In addition, when the second outlet 233 of the switching valve 23 is turned on, the water cooling seat 31 connected to the switching valve 23 discharges liquid, so that the water cooling seat 31 has no liquid or little liquid, which is also beneficial to maintain the circuit test unit 30 and replace the new IGBT to be tested.

[0024] In a preferred embodiment, Figures 1 - 4 As shown, the liquid circulation box 40 is a water circulation box, and the water box 20 also includes a flow meter 25 and a stop valve 26 arranged on the box body 24. The flow meter 25 is connected between the inlet 231 and the water inlet pipe 21, and the stop valve 26 is connected between the water outlet 313 and the water outlet pipe 22. The number of the test unit 30, the switching valve 23, the flow meter 25 and the stop valve 26 is the same, and these components are connected one by one through the pipeline 41 for easy maintenance. The water inlet pipe 21 and the water outlet pipe 22 are both provided with a connection port 221 for water inlet and outlet, and the water inlet pipe 21 and the water outlet pipe 22 are closed at one end away from the water circulation box 40.

[0025] In the above embodiment, the flow meter 25 can read the flow rate, and the stop valve 26 can adjust the amount of water flowing out of the water cooling seat 31. When the second outlet 233 of a certain switching valve 23 is turned on, in order to prevent the water flow of other routes from flowing back into the water cooling seat 31 through the outlet pipe 22, the stop valve 26 is closed. The connecting port 221 facilitates the pipe 41 to connect the water inlet pipe 21 and the outlet pipe 22. The water tank 24 is used to load the pipe 41, the water inlet pipe 21 and the outlet pipe 22 instead of directly filling water. One end of the water inlet pipe 21 and the outlet pipe 22 is closed, which can prevent the water in the water inlet pipe 21 and the outlet pipe 22 from flowing into the water tank 20 and wasting water resources. In order to more accurately measure the flow rate of the water cooling seat 31, the switching valve 23 can be connected to the water cooling seat 31 through another flow meter.

[0026] In a preferred embodiment, Figures 1 - 5 As shown, the test device 10 further includes a partition 32, an upper cabinet 11 and a lower cabinet 12, a plurality of test units 30 are arranged in the upper cabinet 11, and the water tank 20 is arranged in the lower cabinet 12. The upper cabinet 11 and the lower cabinet 12 are both provided with cabinet doors, and the water tank 20 is also provided with a handle 27 and a connector 28, the connector 28 is fixed on one side of the box body 24, and the water tank 20 is fixed in the lower cabinet 12 through the connector 28. The partition 32 is arranged between the upper cabinet 11 and the lower cabinet 12, and a plurality of test units 30 are arranged on the partition 32, and the partition 32 is provided with a plurality of through holes 321 for the pipe 41 to pass through.

[0027] In the above embodiment, the partition 32 can prevent the water vapor in the lower cabinet 12 from rising into the upper cabinet 11, and a test circuit can be provided on the partition 32. The handle 27 facilitates the transportation of the water tank 20. In order to facilitate the communication between the switching valve 23 and the liquid circulation box 40, a perforation is also provided on the lower cabinet 12 for the pipeline 41 to pass through.

[0028] In a preferred embodiment, Figures 6 - 8As shown, the test unit 30 further includes a cover plate 34, a water temperature sensor, and a connecting column 311. The cover plate 34 is disposed between the mounting base 33 and the water-cooling base 31. A middle hole (not shown) communicating with the water tank 314 is provided in the middle of the cover plate 34. The mounting base 33 is connected to the cover plate 34 through the middle hole. The water temperature sensor passes through the water-cooling base 31 and extends into the water tank 314. The connecting column 311 is disposed at the lower end of the water-cooling base 31. The water-cooling base 31 is fixedly connected to the partition plate 32 through the connecting column 311. A signal pin 331 is provided on the side of the mounting base 33, and heat dissipation teeth 332 are provided at the lower end of the mounting base 33. The heat dissipation teeth 332 pass through the middle hole and extend into the water tank 314.

[0029] In the above embodiment, the cover plate 34 can prevent the water in the water tank 314 from overflowing. The water temperature sensor can transmit water temperature information. The connecting column 311 is conducive to installing the water-cooling base 31. The signal pin 331 is conducive to connecting a power source or transmitting a test signal. The heat dissipation teeth 332 are conducive to heat dissipation. A signal generator for generating a test signal can also be provided on the partition plate. The signal generator is fixed on the partition plate 32 and is electrically connected to the signal pin 331.

[0030] Preferably, as Figure 9 shown, the switching valve 23 includes a rotating handle 234. When the rotating handle 234 turns to the first outlet 232, the first outlet 232 is opened for water to flow out; when the rotating handle 234 turns to the second outlet 232, the second outlet 232 is opened for water to flow out.

[0031] In summary, for the IGBT water-cooling test device 100 disclosed in the present application, when the water-cooling base 31 of a certain path does not receive water, the water flow of this path can be returned to the liquid circulation tank 40 through the switching valve 23 without changing the water pressure and flow rate of the water-cooling bases of other paths, thereby facilitating the control of the temperature of the IGBT to be tested.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The descriptions in the above embodiments and the specification are only used to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An IGBT water-cooled test device, characterized in that: It includes a test device and a liquid circulation tank. The test device includes a water tank and multiple test units. The water tank includes a tank body and a switching valve arranged on the tank body. An inlet pipe and an outlet pipe are arranged in the tank body. The inlet pipe and the outlet pipe are respectively communicated with the liquid circulation tank. The test unit includes a water-cooled base and a mounting base for mounting the IGBT to be tested. The water-cooled base includes a water tank and a water inlet and a water outlet arranged at both ends of the water tank. The mounting base is arranged at the upper end of the water tank. The water outlet is communicated with the outlet pipe. The switching valve includes an inlet, a first outlet and a second outlet. The first outlet and the second outlet are respectively communicated with the inlet. The water inlet is communicated with the inlet pipe. The first outlet is communicated with the water inlet of the water-cooled base. The second outlet is communicated with the outlet pipe.

2. The IGBT water-cooled test device according to claim 1, wherein: The switching valve includes a rotating handle. When the rotating handle turns to the first outlet, the first outlet discharges water. When the rotating handle turns to the second outlet, the second outlet discharges water.

3. The IGBT water-cooled test device according to claim 1 or 2, characterized in that: The liquid circulation tank is a water circulation tank. The water tank further includes a flow meter and a stop valve arranged on the tank body. The flow meter is communicated between the inlet and the inlet pipe. The stop valve is communicated between the water outlet and the outlet pipe.

4. The IGBT water-cooled test device according to claim 3, wherein: The test unit, the switching valve, the flow meter and the stop valve are communicated with each other one by one through pipelines. Connection ports for water inlet and outlet are arranged on both the inlet pipe and the outlet pipe. One end of the inlet pipe and the outlet pipe away from the water circulation tank is closed.

5. The IGBT water-cooled test device according to claim 1, wherein: The test unit further includes a cover plate. The cover plate is arranged between the mounting base and the water-cooled base. A middle hole communicated with the water tank is arranged in the middle of the cover plate. The mounting base is connected with the cover plate through the middle hole.

6. The IGBT water-cooled test device according to claim 5, characterized in that: Signal pins are arranged on the side of the mounting base. Heat dissipation teeth are arranged at the lower end of the mounting base. The heat dissipation teeth extend into the water tank through the middle hole.

7. The IGBT water-cooled test device according to claim 1, wherein: The test device further includes an upper cabinet and a lower cabinet. Multiple test units are arranged in the upper cabinet. The water tank is arranged in the lower cabinet.

8. The IGBT water-cooled test device according to claim 7, wherein: The test device further includes a partition plate. The partition plate is arranged between the upper cabinet and the lower cabinet. Multiple test units are all arranged on the partition plate. Multiple through holes facilitating the passing of pipelines are arranged on the partition plate.

9. The IGBT water-cooled test device according to claim 8, wherein: The test unit further includes a water temperature sensor and a connecting column. The water temperature sensor passes through the water-cooled base and extends into the water tank. The connecting column is arranged at the lower end of the water-cooled base. The water-cooled base is fixedly connected with the partition plate through the connecting column.

10. The IGBT water-cooled test device according to claim 7, characterized in that: Doors are arranged on both the upper cabinet and the lower cabinet. A handle and a connecting piece are further arranged on the water tank. The water tank is fixed in the lower cabinet through the connecting piece.

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