Power module cooling and dewatering structure for reactive power aging

Abstract

The utility model discloses a power module cooling and dewatering structure for reactive aging, which relates to the field of aging test of power modules and comprises a water tank, a first interface and a second interface. The first interface and the second interface are respectively communicated with an inner cavity of the water tank, and a tested piece is arranged on the water tank and is in contact with the inner cavity of the water tank; the first connector is provided with an air inlet and a water inlet, and the second connector is provided with an air outlet with an upward opening and a water outlet with a downward opening. The device has the advantages that water drops on the surface of the tested piece are quickly atomized through high-speed airflow and are brought out along with the airflow, and residual water stains on the surface of the tested piece are quickly removed after the test is completed.

Description

Technical Field

[0001] The utility model relates to the field of aging tests of power modules, and particularly to a cooling and water removal structure for power modules used in reactive aging. Background Art

[0002] With the development of technology, the applications of power semiconductor IGBT and MOSFET modules have become increasingly popular. During the device R & D process, manufacturing process, and before application, it is necessary to evaluate their reliability. In terms of evaluation methods, the reactive aging test method can more accurately and reliably simulate the actual application environment of products, which cannot be replaced by conventional measurement methods such as dynamic and static measurements. During the reactive aging test process, it is necessary to effectively dissipate heat from the product and as closely as possible approximate the actual application scenario.

[0003] In the market, the direct water cooling (liquid cooling) packaging method represented by Infineon's HPD packaging has become the preferred packaging for new energy vehicles. When this product undergoes reactive aging tests at the end of the production line, it needs to be cooled in contact with the liquid. After the test is completed, it is necessary to quickly remove the liquid on the surface so as to flow into the next production link. However, it is difficult for the existing devices to quickly remove the liquid on the module surface after the test is completed. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to quickly remove the liquid on the surface of the tested piece after the test is completed.

[0005] The utility model solves the above technical problem by the following technical means: A cooling and water removal structure for power modules used in reactive aging, comprising a water tank, a first interface, and a second interface; the first interface and the second interface are respectively communicated with the inner cavity of the water tank, and the tested piece is installed on the water tank and contacts the inner cavity of the water tank; the first interface is provided with an air inlet and a water inlet, and the second interface is provided with an air outlet opening upward and a water outlet opening downward.

[0006] As an optimized technical solution, a first valve is installed at the air inlet, and a second valve is installed at the water inlet.

[0007] As an optimized technical solution, the first valve and the second valve adopt check valves.

[0008] As an optimized technical solution, the first valve and the second valve adopt solenoid valves.

[0009] As an optimized technical solution, both the first interface and the second interface adopt a T-shaped tee structure.

[0010] As an optimized technical solution, the air inlet and the water inlet are respectively located at the ends of two mutually perpendicular branches of the T-shaped tee structure.

[0011] As an optimized technical solution, the air outlet and the water outlet are respectively located at the ends of two branches along the same straight line on the T-shaped three-way structure.

[0012] As an optimized technical solution, the water tank is a cuboid, and the first interface and the second interface are respectively arranged on opposite sides of the water tank in the length direction.

[0013] The advantages of the present utility model are as follows:

[0014] 1. The design of the second interface with an air outlet opening upward and a water outlet opening downward can naturally divide the water flow and air flow into two paths without using any active components such as valves and switches, which is beneficial to reducing the drainage volume and quickly generating high-speed gas to remove water from the measured part. The water droplets on the surface of the measured part are quickly atomized by the high-speed air flow and carried out with the air flow, realizing the rapid removal of the residual water stains on the surface of the measured part after the test is completed.

[0015] 2. Using the one-way valve and the three-way structure close to the measured part makes the area where the coolant and the high-speed air flow need to cross each other in the whole system as small as possible, reducing the volume that needs to be switched between water flow and air flow inside the whole system, thereby reducing the actual required drainage volume and finally achieving the purpose of reducing the drainage time. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the power module cooling and water removal structure for reactive aging in the embodiment of the present utility model. Detailed Embodiments

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] Embodiment 1

[0019] As Figure 1 shown, the embodiment of the present utility model discloses a power module cooling and water removal structure for reactive aging, including a water tank 1, a first interface 2, and a second interface 3.

[0020] The water tank 1 is a cuboid, the first interface 2 and the second interface 3 are respectively arranged on opposite sides of the water tank 1 in the length direction and are respectively communicated with the inner cavity of the water tank 1, and the measured part 4 is installed on the water tank 1 and contacts the inner cavity of the water tank 1.

[0021] The first interface 2 adopts a T-shaped tee structure. The first interface 2 is provided with an air inlet 21 and a water inlet 22, and the air inlet 21 and the water inlet 22 are respectively located at the ends of two mutually perpendicular branches of the T-shaped tee structure; a first valve 23 is installed at the air inlet 21, and a second valve 24 is installed at the water inlet 22. The first valve 23 and the second valve 24 adopt check valves.

[0022] The second interface 3 adopts a T-shaped tee structure. The second interface 3 is provided with an air outlet 31 with an upward opening and a water outlet 32 with a downward opening, and the air outlet 31 and the water outlet 32 are respectively located at the ends of two branches along the same straight line of the T-shaped tee structure.

[0023] The first interface 2 and the second interface 3 adopting the T-shaped tee structure is a building method for the system. Its essence lies in that the water tank 1 has connecting pipelines with 1 inlet and 2 outlets and 1 outlet and 2 inlets, so that the air path and the water path outside the water tank 1 can be as independent as possible and do not affect each other.

[0024] Working principle: After the measured part 4 is fixed to the water tank 1, the measured part starts to be tested. During the test, a cooling link is carried out: Liquid is transported from the water inlet 22 through the second valve 24 into the water tank 1 to contact and exchange heat with the measured part 4, and then the liquid flows along the water tank to the water outlet 32 and flows out. Due to the action of gravity, the liquid will not flow out from the air outlet 31.

[0025] After the test is completed, a water removal link is carried out: The water pump at the front end of the water inlet 22 is closed, the high-pressure air valve is opened, high-pressure air enters the water tank 1 through the first valve 23 and flows out from the air outlet 31. Due to the action of the check valve, the high-pressure air will press the second valve 24 at the water inlet to be in a closed state and blow the liquid out of the water tank 1. After the liquid in the water tank 1 is basically blown out, the gas can quickly flow out from the air outlet 31, and a high-speed air flow is quickly formed in the water tank 1. The impact of the high-speed air flow can impact the water stains attached to the surface of the measured part 4 into water mist and discharge it with the high-speed flowing air, thereby achieving the effect of rapid drainage. After simulation, the maximum speed of the air flow in the water tank 1 can reach 27 m / s.

[0026] Embodiment 2

[0027] The difference between this embodiment and Embodiment 1 is that the first valve 23 and the second valve 24 adopt fast valves such as solenoid valves.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power module cooling and water removal structure for reactive power aging, characterized in that: It includes a water tank, a first interface and a second interface; the first interface and the second interface are respectively connected to the inner cavity of the water tank, and the tested piece is installed on the water tank and contacts the inner cavity of the water tank; the first interface is provided with an air inlet and a water inlet, and the second interface is provided with an air outlet opening upward and a water outlet opening downward.

2. The power module cooling and water removal structure for reactive power aging according to claim 1, characterized in that: The air inlet is installed with a first valve, and the water inlet is installed with a second valve.

3. The power module cooling and water removal structure for reactive power aging according to claim 2, characterized in that: The first valve and the second valve are one-way valves.

4. The power module cooling and water removal structure for reactive power aging according to claim 2, characterized in that: The first valve and the second valve are solenoid valves.

5. The power module cooling and water removal structure for reactive power aging according to claim 1, characterized in that: The first interface and the second interface both adopt a T-shaped three-way structure.

6. The power module cooling and water removal structure for reactive power aging according to claim 5, characterized in that: The air inlet and the water inlet are respectively located at the ends of two mutually perpendicular branches of the T-shaped three-way structure.

7. The power module cooling and water removal structure for reactive power aging according to claim 5, characterized in that: The air outlet and the water outlet are respectively located at the ends of two branches along the same straight line on the T-shaped three-way structure.

8. The power module cooling and water removal structure for reactive power aging according to claim 1, characterized in that: The water tank is a rectangular parallelepiped, and the first interface and the second interface are respectively arranged on two opposite sides of the water tank in the length direction.

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