Power module water cooling device and power module thermal resistance test system
By designing a water-cooling device that includes a water jacket fixture and a temperature detection module, the heat dissipation problem of SiC power modules was solved, achieving efficient heat dissipation and thermal resistance testing, and ensuring the stability and accuracy of the test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-07
AI Technical Summary
Existing water-cooled platforms for thermal resistance testing cannot effectively dissipate heat from SiC power modules equipped with pin-fin heat dissipation.
A power module water cooling device was designed, including a water jacket fixture, a water storage tank, a fixing mechanism, a water inlet, a water outlet, a water inlet pipe, a water outlet pipe, a flow meter, and a temperature detection module. The device uses cooling water to wrap around the needle-fin heat dissipation structure, and monitors the temperature and flow rate of the inlet and outlet water in real time. The water temperature and flow rate are adjusted to improve the heat dissipation effect.
It achieves efficient heat dissipation for SiC power modules, can monitor and adjust cooling water parameters in real time, accurately calculate junction temperature and thermal resistance, prevent power modules from overheating, and improve the stability and accuracy of testing.
Smart Images
Figure CN224098027U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power module testing technology, and more specifically, to a power module water cooling device and a power module thermal resistance testing system. Background Technology
[0002] Silicon carbide (SiC) power modules, as a novel type of power device, possess numerous excellent properties such as high temperature resistance, high voltage resistance, radiation resistance, high power density, and good frequency characteristics. Since their introduction, they have received widespread attention from various fields and have broad application prospects in 5G infrastructure, motor control, switching power supplies, rail transit, and intelligent power transmission and distribution. SiC devices offer advantages in power density and small chip size, giving them superior power handling capabilities and miniaturization. However, this also leads to high operating temperatures in the active region, severely impacting device characteristics and long-term reliability. Therefore, thermal resistance testing is necessary to calculate the junction temperature of the power module.
[0003] Thermal resistance testing of SiC power modules plays a crucial role in the field of power electronics. With technological advancements, testing methods have been continuously improved and optimized, significantly enhancing accuracy and efficiency. Thermal resistance testing fixtures for SiC power modules are specialized equipment suitable for measuring the thermal resistance of power modules, ensuring effective heat dissipation during operation and preventing overheating damage. Unlike single-tube devices or modules with planar heat dissipation structures, most SiC power modules have integrated finned heat dissipation capabilities. Therefore, traditional water-cooled platforms are ineffective for heat dissipation in SiC power module thermal resistance testing.
[0004] In summary, existing water-cooled platforms for thermal resistance testing cannot effectively dissipate heat from SiC power modules equipped with pin fin heat dissipation functions. Utility Model Content
[0005] The purpose of this application is to provide a power module water cooling device and a power module thermal resistance testing system to solve the problem that the existing thermal resistance testing water cooling platform cannot effectively dissipate heat from SiC power modules with pin fin heat dissipation function.
[0006] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:
[0007] On one hand, embodiments of this application provide a power module water cooling device, the power module water cooling device comprising:
[0008] A water jacket fixture; the water jacket fixture is provided with a water storage tank and a fixing mechanism, and the water storage tank is provided with an inlet and an outlet on opposite sides; when the power module is installed in the water jacket fixture, the fixing mechanism is used to fix the power module, and the pin fin heat dissipation structure of the power module is located in the water storage tank;
[0009] A water inlet pipe connected to the water inlet; the water inlet pipe is used to allow cooling water to flow into the water storage tank;
[0010] A flow meter and a first temperature detection module are installed on the water inlet pipe; the flow meter is used to detect the flow rate of cooling water flowing into the water storage tank, and the first temperature detection module is used to detect the temperature of cooling water flowing into the water storage tank.
[0011] A water outlet pipe connected to the water outlet; the water outlet pipe is used to allow cooling water to flow out from the water storage tank;
[0012] A second temperature detection module is installed on the water outlet pipe; the second temperature detection module is used to detect the temperature of the cooling water flowing out of the water storage tank.
[0013] Optionally, the water storage tank is configured as a trapezoid.
[0014] Optionally, the water inlet is located on the side near the lower base of the trapezoid, and the water outlet is located on the side near the upper base of the trapezoid.
[0015] Optionally, the water jacket fixture is further provided with a groove, which surrounds the outside of the water storage tank. The water jacket fixture also includes a first sealing ring, which is disposed in the groove. When the power module is installed in the water jacket fixture, the power module and the water jacket fixture are sealed by the first sealing ring.
[0016] Optionally, the fixing mechanism includes mounting through holes, which are located at the four corners of the water jacket fixture.
[0017] Optionally, one end of the water inlet pipe and the water outlet pipe are provided with external threads, and the water inlet and the water outlet are provided with internal threads. The water inlet pipe is connected to the water jacket fixture by threads, and the water outlet pipe is also connected to the water jacket fixture by threads.
[0018] Optionally, the power module water cooling device further includes a second sealing ring. The water inlet pipe includes a first water inlet pipe and a second water inlet pipe. One end of the first water inlet pipe is connected to the water inlet, and the other end of the first water inlet pipe is configured as a first disc structure. One end of the second water inlet pipe is configured as a second disc structure. The first disc structure and the second disc structure are detachably connected, and the second sealing ring is disposed between the first disc structure and the second disc structure to achieve a seal.
[0019] The flow meter is connected to the second inlet pipe.
[0020] Optionally, the first temperature detection module is a thermocouple wire, and the first water inlet pipe is provided with a through hole, with the first temperature detection module embedded in the through hole of the first water inlet pipe.
[0021] Optionally, the power module water cooling device further includes a third sealing ring. The water outlet pipe includes a first water outlet pipe and a second water outlet pipe. One end of the first water outlet pipe is connected to the water outlet. The other end of the first water outlet pipe is configured as a third disc structure. One end of the second water outlet pipe is configured as a fourth disc structure. The third disc structure and the fourth disc structure are detachably connected. The third sealing ring is disposed between the third disc structure and the fourth disc structure to achieve a seal. The second temperature detection module is a thermocouple wire. A through hole is provided on the first water outlet pipe. The second temperature detection module is embedded in the through hole of the first water outlet pipe.
[0022] On the other hand, this application also provides a power module thermal resistance testing system, which includes the power module water cooling device described above.
[0023] Compared with the prior art, this application has the following advantages:
[0024] This application provides a power module water cooling device, which includes: a water jacket fixture; a water storage tank and a fixing mechanism are provided in the water jacket fixture, and an inlet and an outlet are respectively provided on opposite sides of the water storage tank; when the power module is installed in the water jacket fixture, the fixing mechanism is used to fix the power module, and the pin-fin heat dissipation structure of the power module is located in the water storage tank; an inlet pipe connected to the inlet; the inlet pipe is used to allow cooling water to flow into the water storage tank; a flow meter and a first temperature detection module are installed on the inlet pipe; the flow meter is used to detect the flow rate of the cooling water flowing into the water storage tank, and the first temperature detection module is used to detect the temperature of the cooling water flowing into the water storage tank; an outlet pipe connected to the outlet; the outlet pipe is used to allow cooling water to flow out of the water storage tank; and a second temperature detection module is installed on the outlet pipe; the second temperature detection module is used to detect the temperature of the cooling water flowing out of the water storage tank.
[0025] On the one hand, since the power module water cooling device provided in this application is equipped with a water storage tank, after the power module is installed in the water jacket fixture, the pin-fin heat dissipation structure of the power module can be located inside the water storage tank, so that the pin-fin heat dissipation structure of the power module can be surrounded by the cooling water in the water storage tank, resulting in better heat dissipation. On the other hand, since the power module water cooling device provided in this application includes a flow meter, a first temperature detection module, and a second temperature detection module, the water temperature and flow rate of the inlet and outlet water can be detected in real time. This allows for easy adjustment of the water temperature and the inlet and outlet water flow rate according to actual operating conditions, which is beneficial for measuring the thermal resistance of different power levels.
[0026] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the power module water cooling device provided in the embodiments of this application.
[0029] Figure 2 This is a schematic diagram of the power module provided in an embodiment of this application.
[0030] Figure 3 This is a schematic diagram of the structure of the water jacket fixture provided in the embodiments of this application.
[0031] Figure 4 This is a schematic diagram of the structure of the second water inlet pipe provided in an embodiment of this application.
[0032] Figure 5 This is a schematic diagram of the flow meter structure provided in an embodiment of this application.
[0033] Figure 6 This is a schematic diagram of the structure of the third water inlet pipe provided in an embodiment of this application.
[0034] In the picture:
[0035] 110-Water jacket fixture; 111-Water storage tank; 112-Water inlet; 113-Water outlet; 114-Mounting through hole; 115-Groove; 120-Water inlet pipe; 121-First water inlet pipe; 122-Second water inlet pipe; 123-Third water inlet pipe; 130-Water outlet pipe; 131-First water outlet pipe; 132-Second water outlet pipe; 140-Flow meter; 150-First temperature detection module; 160-Second temperature detection module; 200-Power module. Detailed Implementation
[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0037] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0038] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0039] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.
[0040] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0041] As described in the background section, currently, for SiC power modules with pin-fin heat dissipation, the water-cooling platform cannot effectively dissipate heat from the SiC power module when conducting thermal resistance tests.
[0042] In view of this, and in order to solve the above problems, this application provides a power module water cooling device. The power module water cooling device provided in this application is described below by way of example:
[0043] As an optional implementation, please refer to Figures 1-3The power module water cooling device includes: a water jacket fixture 110; a water storage tank 111 and a fixing mechanism are provided in the water jacket fixture 110, and an inlet 112 and an outlet 113 are respectively provided on opposite sides of the water storage tank 111; when the power module is installed in the water jacket fixture 110, the fixing mechanism is used to fix the power module, and the pin fin heat dissipation structure of the power module is located in the water storage tank 111; an inlet pipe 120 connected to the inlet 112; the inlet pipe 120 is used to allow cooling water to flow into the water storage tank 111; and a cooling mechanism is installed on the inlet pipe 112. The system includes a flow meter 140 and a first temperature detection module 150; the flow meter 140 is used to detect the flow rate of cooling water flowing into the water storage tank 111, and the first temperature detection module 150 is used to detect the temperature of the cooling water flowing into the water storage tank 111; an outlet pipe 130 is connected to the outlet 113; the outlet pipe 130 is used to allow cooling water to flow out of the water storage tank 111; and a second temperature detection module 160 is installed on the outlet pipe 130; the second temperature detection module 160 is used to detect the temperature of the cooling water flowing out of the water storage tank 111.
[0044] Figure 2 The diagram shows the structure of the power module 200. As shown, the power module 200 has a finned heat dissipation structure at its bottom, which can effectively dissipate heat during operation. The power module also has mounting holes around its perimeter for easy fixation.
[0045] On the one hand, since the power module water cooling device provided in this application is equipped with a water storage tank 111, after the power module is installed in the water jacket fixture 110, the pin-fin heat dissipation structure of the power module can be located inside the water storage tank 111, so that the pin-fin heat dissipation structure of the power module can be wrapped by the cooling water in the water storage tank 111, resulting in better heat dissipation. On the other hand, since the power module water cooling device provided in this application includes a flow meter 140, a first temperature detection module 150, and a second temperature detection module 160, the water temperature and flow rate of the inlet and outlet water can be detected in real time, which makes it easy to adjust the water temperature and the inlet and outlet water flow rate according to the actual working conditions, and facilitates the measurement of thermal resistance of different power levels.
[0046] In practical applications, when thermal resistance testing of a power module is required, the power module needs to be placed on the water jacket fixture 110, and an external voltage and current source is connected to power the power module. When the power module is turned on, it consumes power and generates heat, which is dissipated through the bottom finned heat dissipation structure. Since the finned heat dissipation structure is placed in the water tank 111 and is in direct contact with the cooling water, heat transfer occurs directly between the finned heat dissipation structure and the cooling water, carrying away the heat generated by the power module. By measuring the temperature of the water flowing into and out of the water tank 111, the junction temperature of the power module can be accurately calculated.
[0047] As one implementation method, the water storage tank 111 is designed with a trapezoidal structure. By designing the water storage tank as a trapezoid, power modules of different sizes and shapes can be adapted.
[0048] In one implementation, the inlet 112 is located near the lower base of the trapezoid, and the outlet 113 is located near the upper base of the trapezoid. This arrangement ensures a relatively fast flow rate at the inlet 112 and a relatively slow flow rate at the outlet 113. Consequently, when cooling water flows into the storage tank 111, its relatively fast flow rate results in less heat removal. Conversely, when the cooling water flows to the outlet 113, its temperature is higher than at the inlet, but its relatively slow flow rate means that the amount of heat removed is roughly equal to that removed at the inlet. Therefore, the cooling water in the entire storage tank 111 removes heat relatively evenly at all locations, resulting in better heat dissipation for the power module.
[0049] And, as Figure 3 As shown, the fixing mechanism on the water jacket fixture 110 can be a mounting through hole 114, and the mounting through holes 114 are provided at the four corners of the water jacket fixture 110. (Combined with...) Figure 1 As shown, through holes are also provided at the four corners of the power module. Therefore, when installing the power module on the water jacket fixture 110, the four corners of the power module can be fixed to the water jacket fixture 110 with bolts, thereby achieving the fixation of the power module. At the same time, positioning holes can also be provided on the water jacket fixture 110, which can be fixed to the thermal resistance testing current source machine through the positioning holes, improving the portability of the test.
[0050] In addition, please continue to refer to Figure 3 The water jacket fixture 110 also has a groove 115, which surrounds the outside of the water storage tank 111. The water jacket fixture 110 also includes a first sealing ring, which is disposed within the groove 115. When the power module is installed in the water jacket fixture 110, the power module and the water jacket fixture 110 are sealed by the first sealing ring. By setting the first sealing ring, leakage of cooling water from the connection between the power module and the water jacket can be effectively prevented when performing thermal resistance testing on the power module, thereby making the test more stable and the test results more accurate.
[0051] In one implementation, one end of the inlet pipe 120 and the outlet pipe 130 are provided with external threads, and the inlet port 112 and the outlet port 113 are provided with internal threads. The inlet pipe 120 is connected to the water jacket fixture 110 by threads, and the outlet pipe 130 is also connected to the water jacket fixture 110 by threads.
[0052] By using a threaded connection, portable installation of the inlet pipe 120 and outlet pipe 130 can be achieved. Furthermore, the power module water cooling device also includes a second sealing ring. The inlet pipe 120 includes a first inlet pipe 121 and a second inlet pipe 122. One end of the first inlet pipe 121 is connected to the inlet 112, and the other end of the first inlet pipe 121 is configured as a first disc structure, such as... Figure 4 As shown, one end of the second water inlet pipe 122 is configured as a second disc structure. The first disc structure and the second disc structure are detachably connected, and a second sealing ring is disposed between the first disc structure and the second disc structure to achieve a seal. That is, in this application, the disc structure enables communication between adjacent pipes and achieves a seal at the connection between adjacent pipes to prevent water leakage.
[0053] in, Figure 5 The present application provides a schematic diagram of the flow meter structure, wherein the flow meter 140 is connected to the second inlet pipe 122. Furthermore, the second inlet pipe 122 is connected to both sides of the flow meter 140.
[0054] The first temperature detection module 150 is a thermocouple wire, and a through hole is provided on the first water inlet pipe 121. The first temperature detection module 150 is embedded in the through hole of the first water inlet pipe 121.
[0055] Of course, the other end of the second inlet pipe 122 can also be configured as a disc structure, which facilitates interconnection with other water pipes. For example, please refer again. Figure 1 The power module water cooling device also includes a third water inlet pipe 123, which is connected to the second water inlet pipe 122 via a disc structure. Figure 6 As shown, the third water inlet pipe 123 can be configured as a bent structure, with a disc structure at one end and the other end directly connected to the cooling water source to realize the circulation of cooling water.
[0056] The above implementation method facilitates the disassembly of the entire inlet pipe 120. When installing the inlet pipe 120, the first inlet pipe 121 can be tightened to the water jacket fixture 110 first, then the first inlet pipe 121 can be interconnected with the second inlet pipe 122. After installing the flow meter, the second inlet pipe 122 can be interconnected with the third inlet pipe 123. Furthermore, the second inlet pipe 122 is connected to the flow meter 140, making the pipe connected to the flow meter 140 relatively independent, simplifying its disassembly. Replacement of the flow meter 140, whether damaged or replaced with a different model, is also easier. Moreover, by embedding the first temperature detection module 150 in the through-hole of the first inlet pipe 121, even replacing the pipe containing the flow meter 140 will not affect the first temperature sensor, making overall use more flexible.
[0057] Similarly, the power module water cooling device also includes a third sealing ring. The water outlet pipe 130 includes a first water outlet pipe 131 and a second water outlet pipe 132. One end of the first water outlet pipe 131 is connected to the water outlet 113, and the other end of the first water outlet pipe 131 is configured as a third disc structure. One end of the second water outlet pipe 132 is configured as a fourth disc structure. The third disc structure and the fourth disc structure are detachably connected, and the third sealing ring is set between the third disc structure and the fourth disc structure to achieve a seal. The second temperature detection module 160 is a thermocouple wire. The first water outlet pipe 131 is provided with a through hole, and the second temperature detection module 160 is embedded in the through hole of the first water outlet pipe 131.
[0058] Understandably, this configuration allows for easy installation of the first outlet pipe 131 and the water jacket fixture 110 during the installation of the outlet pipe 130, followed by the installation of the first outlet pipe 131 and the second outlet pipe 132, making the installation more convenient. After connection, the second inlet pipe 122 is connected to the cooling water source, and the second outlet pipe 132 is connected to the cold water source, allowing the cooling water to circulate in the pipes and the water storage tank 111.
[0059] In one implementation, the water jacket fixture 110 and the connecting pipes (i.e., the inlet pipe 120 and the outlet pipe 130) are both made of aluminum or other metal alloys, which are inexpensive and have low operating costs.
[0060] Therefore, the power module water cooling device provided in this application has at least the following beneficial effects:
[0061] First, the upper surface of the water jacket fixture 110 is provided with a trapezoidal water storage tank, so that the pin fin heat dissipation structure of the power module can be inserted, so that the power module is in close contact with the water jacket fixture 110. The flowing ice water is temporarily stored in the trapezoidal tank, which can quickly remove the high temperature generated when the power module is powered on for testing.
[0062] Secondly, the water jacket fixture 110 is equipped with an inlet 112 and an outlet 113 at both ends. The connecting pipes at both ends are screwed into the water jacket fixture 110 through the threaded ends. The connecting pipes on both sides are also equipped with double thermocouple wires to monitor the change in water temperature before and after power-on during thermal resistance measurement. After the power module is connected to the current source and voltage source, the change in water temperature before and after the water jacket and the change in power switching power of the power module are calculated during the test, thereby quickly calculating the thermal resistance. This test method can quickly and conveniently test the junction temperature of the power module to calculate the thermal resistance, and can also remove the temperature of the power module through the water cooling medium during the test to prevent the power module from overheating and failing.
[0063] Third, grooves are also provided on the connecting pipes and water jackets for attaching sealing rings, which serve to seal and waterproof the pipes.
[0064] Fourth, both the inlet pipe 120 and the outlet pipe 130 are equipped with a disc structure as a quick-release interface, which allows for quick disassembly of the water pipes and facilitates the replacement of power module water jackets of different models and sizes.
[0065] Based on the above implementation, this application embodiment also provides a power module thermal resistance testing system, which includes the power module water cooling device described above.
[0066] In summary, this application provides a power module water cooling device, which includes: a water jacket fixture; a water storage tank and a fixing mechanism are provided in the water jacket fixture, and an inlet and an outlet are respectively provided on opposite sides of the water storage tank; when the power module is installed in the water jacket fixture, the fixing mechanism is used to fix the power module, and the pin-fin heat dissipation structure of the power module is located in the water storage tank; an inlet pipe connected to the inlet; the inlet pipe is used to allow cooling water to flow into the water storage tank; a flow meter and a first temperature detection module are installed on the inlet pipe; the flow meter is used to detect the flow rate of the cooling water flowing into the water storage tank, and the first temperature detection module is used to detect the temperature of the cooling water flowing into the water storage tank; an outlet pipe connected to the outlet; the outlet pipe is used to allow cooling water to flow out of the water storage tank; and a second temperature detection module is installed on the outlet pipe; the second temperature detection module is used to detect the temperature of the cooling water flowing out of the water storage tank. On the one hand, since the power module water cooling device provided in this application is equipped with a water storage tank, after the power module is installed in the water jacket fixture, the pin-fin heat dissipation structure of the power module can be located inside the water storage tank, so that the pin-fin heat dissipation structure of the power module can be surrounded by the cooling water in the water storage tank, resulting in better heat dissipation. On the other hand, since the power module water cooling device provided in this application includes a flow meter, a first temperature detection module, and a second temperature detection module, the water temperature and flow rate of the inlet and outlet water can be detected in real time. This allows for easy adjustment of the water temperature and the inlet and outlet water flow rate according to actual operating conditions, which is beneficial for measuring the thermal resistance of different power levels.
[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
[0068] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A power module water cooling device, characterized in that, The power module water cooling device includes: A water jacket fixture; the water jacket fixture is provided with a water storage tank and a fixing mechanism, and the water storage tank is provided with an inlet and an outlet on opposite sides; when the power module is installed in the water jacket fixture, the fixing mechanism is used to fix the power module, and the pin fin heat dissipation structure of the power module is located in the water storage tank; A water inlet pipe connected to the water inlet; the water inlet pipe is used to allow cooling water to flow into the water storage tank; A flow meter and a first temperature detection module are installed on the water inlet pipe; the flow meter is used to detect the flow rate of cooling water flowing into the water storage tank, and the first temperature detection module is used to detect the temperature of cooling water flowing into the water storage tank. A water outlet pipe connected to the water outlet; the water outlet pipe is used to allow cooling water to flow out from the water storage tank; A second temperature detection module is installed on the water outlet pipe; the second temperature detection module is used to detect the temperature of the cooling water flowing out of the water storage tank.
2. The power module water cooling device as described in claim 1, characterized in that, The water storage tank is designed in a trapezoidal shape.
3. The power module water cooling device as described in claim 2, characterized in that, The water inlet is located on the side near the bottom of the trapezoid, and the water outlet is located on the side near the top of the trapezoid.
4. The power module water cooling device as described in claim 1, characterized in that, The water jacket fixture is also provided with a groove, which surrounds the outside of the water storage tank. The water jacket fixture also includes a first sealing ring, which is disposed in the groove. When the power module is installed in the water jacket fixture, the power module and the water jacket fixture are sealed by the first sealing ring.
5. The power module water cooling device as described in claim 1, characterized in that, The fixing mechanism includes mounting through holes, which are located at the four corners of the water jacket fixture.
6. The power module water cooling device as described in claim 1, characterized in that, Both the inlet pipe and the outlet pipe have external threads at one end, and the inlet and outlet pipes have internal threads. The inlet pipe is connected to the water jacket fixture by threads, and the outlet pipe is also connected to the water jacket fixture by threads.
7. The power module water cooling device as described in claim 1, characterized in that, The power module water-cooling device further includes a second sealing ring. The water inlet pipe includes a first water inlet pipe and a second water inlet pipe. One end of the first water inlet pipe is connected to the water inlet, and the other end of the first water inlet pipe is configured as a first disc structure. One end of the second water inlet pipe is configured as a second disc structure. The first disc structure and the second disc structure are detachably connected, and the second sealing ring is disposed between the first disc structure and the second disc structure to achieve a seal. The flow meter is connected to the second inlet pipe.
8. The power module water cooling device as described in claim 7, characterized in that, The first temperature detection module is a thermocouple wire, and the first water inlet pipe has a through hole. The first temperature detection module is embedded in the through hole of the first water inlet pipe.
9. The power module water cooling device as described in claim 1, characterized in that, The power module water cooling device also includes a third sealing ring. The water outlet pipe includes a first water outlet pipe and a second water outlet pipe. One end of the first water outlet pipe is connected to the water outlet, and the other end of the first water outlet pipe is configured as a third disc structure. One end of the second water outlet pipe is configured as a fourth disc structure. The third disc structure and the fourth disc structure are detachably connected, and the third sealing ring is disposed between the third disc structure and the fourth disc structure to achieve a seal. The second temperature detection module is a thermocouple wire. The first water outlet pipe has a through hole, and the second temperature detection module is embedded in the through hole of the first water outlet pipe.
10. A power module thermal resistance testing system, characterized in that, The power module thermal resistance testing system includes the power module water cooling device as described in any one of claims 1 to 9.