Power module, electric drive system and vehicle

Abstract

The utility model relates to a power module, an electric drive system and a vehicle, the power module comprises a first power element and a jet flow component, the jet flow component and the first power element are sequentially arranged in the first direction, the jet flow component is provided with a jet flow hole, and in the first direction, at least part of the jet flow hole is opposite to the first power element; and the jet hole is used for jetting fluid for cooling the first power element. The utility model aims to perform heat dissipation on the power module so as to prolong the service life of the power module.

Description

Power modules, electric drive systems and vehicles Technical Field

[0001] This application relates to the field of power module technology, and more particularly to a power module, an electric drive system, and a vehicle. Background Technology

[0002] In related technologies, vehicles include power modules, which may be configured as, but are not limited to, on-board charger modules and motor controller power modules. It is understood that the power module includes power components, such as, but not limited to, chips. These power components generate heat during operation, which can cause the power module's temperature to become too high, thereby reducing the power module's lifespan. Summary of the Invention

[0003] This application provides a power module, an electric drive system, and a vehicle, which are designed to dissipate heat from the power module in order to extend its service life.

[0004] To achieve the above objectives, according to a first aspect of this application, a power module is provided, comprising:

[0005] First power element: and

[0006] A jetting component is arranged sequentially with the first power element in a first direction. The jetting component is provided with jetting holes. In the first direction, the jetting holes are at least partially arranged opposite to the first power element. The jetting holes are used to spray fluid to dissipate heat from the first power element.

[0007] Optionally, the jet orifice is provided in multiple ways, and the first power element is disposed opposite to at least one of the jet orifices.

[0008] Optionally, the power module further includes a second power element, wherein the power of the first power element is greater than the power of the second power element.

[0009] Optionally, the jet holes are provided in multiple ways, and the first power element is provided in multiple ways. At least some of the jet holes have different heat dissipation capabilities, and at least some of the first power elements have different power. The heat dissipation capability of the jet holes is positively correlated with the power of the corresponding first power element.

[0010] Optionally, the power module further includes a flow deflector, wherein the first power element is disposed on the side of the flow deflector opposite to the jet orifice.

[0011] Optionally, the power module further includes a circuit board disposed between the current-blocking member and the first power element, wherein the first power element is connected to the circuit board;

[0012] And / or, the power module further includes a heat dissipation protrusion disposed on the side of the flow deflector near the jet hole.

[0013] Optionally, the flow-blocking member and the jetting member are connected to jointly restrict the liquid outlet channel, and the jetting orifice is in communication with the liquid outlet channel.

[0014] Optionally, the liquid outlet channel includes a drain chamber and a first channel for receiving the liquid output from the drain chamber. The first channel is set at an angle to the drain chamber, and the connection between the first channel and the drain chamber is smoothly transitioned.

[0015] Optionally, the jet component is provided with a water storage cavity and a second flow channel for conveying liquid to the water storage cavity. The second flow channel is set at an angle to the water storage cavity, and the connection between the second flow channel and the water storage cavity is smoothly transitioned. The jet hole is opened in the cavity wall of the water storage cavity.

[0016] Optionally, the second flow channel is located on the side of the water storage cavity away from the first power element, and in the first direction, the projection of the first power element is located within the projection of the cavity wall of the water storage cavity.

[0017] According to a second aspect of this application, an electric drive system is provided, including the aforementioned power module.

[0018] According to a third aspect of this application, a vehicle is provided, including the aforementioned power module.

[0019] In the power module of this application embodiment,

[0020] Through the above technical solution, the jetting component is provided with jetting holes for spraying fluid to dissipate heat from the first power element. It can be understood that the fluid exchanges heat with the power module, preventing the power module temperature from becoming excessively high, thereby extending the power module's service life. Furthermore, the jetting component and the first power element are arranged sequentially in a first direction, with the jetting holes positioned at least partially opposite to the first power element in that direction. This allows the fluid sprayed from the jetting holes to concentrate heat dissipation on the first power element, preventing the power module temperature from becoming excessively high and thus extending the power module's service life.

[0021] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0024] Figure 1 is a schematic diagram of the overall structure of the power module provided in an exemplary embodiment of this disclosure.

[0025] Figure 2 is a perspective view of the power module in Figure 1;

[0026] Figure 3 is a schematic diagram of the second flow channel and liquid storage chamber of the power module in Figure 2;

[0027] Figure 4 is a schematic diagram of the liquid outlet channel in Figure 2;

[0028] Figure 5 is a schematic diagram of the power module in Figure 2 from the z-direction perspective.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100 Power module; 200 First power element; 300 Second power element; 400 Jet component; 410 Jet orifice; 500 Baffle; 600 Circuit board; 700 Liquid outlet channel; 710 Drainage chamber; 720 First flow channel; 810 Water storage chamber; 820 Second flow channel. Detailed Implementation

[0031] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0032] According to a first aspect of this application, referring to Figures 1, 2, and 5, this disclosure provides a power module 100, which includes a first power element 200 and a jetting member 400. The jetting member 400 is provided with jetting holes 410 for spraying fluid to dissipate heat from the first power element 200. It is understood that by exchanging heat with the fluid in the power module 100, the temperature of the power module 100 will not become excessively high, thereby extending the service life of the power module 100.

[0033] Furthermore, the jetting component 400 and the first power element 200 are sequentially arranged in a first direction, and in the first direction, the jetting hole 410 is at least partially arranged opposite to the first power element 200. This allows the fluid ejected from the jetting hole 410 to more concentratedly dissipate heat from the first power element 200, preventing the temperature of the power module 100 from becoming excessively high, thereby extending the service life of the power module 100.

[0034] In some embodiments, the power module 100 may be configured as, but is not limited to, an on-board charger module and a motor controller power module 100. The power chip may be configured as, but is not limited to, a chip. The cross-section of the jet hole 410 may be configured as, but is not limited to, circular, square, and irregular shapes.

[0035] In some embodiments, multiple jet holes 410 are provided, and the first power element 200 is disposed opposite to at least one corresponding jet hole 410. This is beneficial to improving the heat dissipation efficiency of the power module 100 on the first power element 200.

[0036] In some embodiments, the power module 100 further includes a second power element 300, wherein the power of the first power element 200 is greater than the power of the second power element 300. It is understood that during operation of the power module, the heat generated by the first power element 200 is greater than the heat generated by the second power element 300. The jet orifice 410 injects fluid to dissipate heat from the first power element 200, thereby reducing the temperature difference between the first power element 200 and the second power element 300, resulting in a more uniform temperature distribution in the power module 100. In one example, the power of the first power element 200 is greater than 10 watts, and the power of the second power element 300 is less than or equal to 10 watts.

[0037] In some embodiments, multiple jet holes 410 are provided, and multiple first power elements 200 are provided. At least some of the jet holes 410 have different heat dissipation capabilities, and at least some of the first power elements 200 have different power. The heat dissipation capability of the jet hole 410 is positively correlated with the power of the corresponding first power element 200. That is, the jet hole 410 with a smaller heat dissipation capability corresponds to the first power element 200 with a higher power.

[0038] It is understandable that when the first power element 200 is running, if the power of the first power element 200 is higher, the heat generated by the first power element 200 will be greater and the temperature of the first power element 200 will be higher. In other words, the higher the power of the first power element 200, the greater the heat dissipation requirement of the first power element 200.

[0039] The heat dissipation capacity of the jet orifice 410 is matched with the power of the corresponding first power element 200, ensuring that multiple first power elements 200 can receive cooling that is appropriate for their heat generation, thereby improving the efficiency of the entire heat dissipation system. In addition, it can avoid the problem of some first power elements 200 being too cold or too hot, allowing the first power elements 200 to operate within an optimal temperature range.

[0040] In one example, the heat dissipation capacity of the jet orifice 410 is related to the orifice size of the jet orifice 410, which can be determined through simulation and testing.

[0041] In some embodiments, the power of the plurality of first power elements 200 is the same. However, the design is not limited thereto, and in some other embodiments, the power of the plurality of first power elements 200 is not the same.

[0042] In some embodiments, the power module 100 further includes a flow deflector 500, and a first power element 200 is disposed on the side of the flow deflector 500 away from the jet hole 410.

[0043] The fluid ejected from the jet orifice 410 has high velocity and pressure, and direct impact on the first power element 200 may cause physical damage. The baffle 500 can act as a buffer to protect the first power element 200 from direct impact by the fluid.

[0044] It is understood that the fluid ejected from the jet orifice 410 flows to the baffle 500, and the fluid exchanges heat with the first power element 200 through the baffle 500. In the first direction, the baffle 500 is at least partially opposite to the first power element 200 at the point where the fluid ejected from the jet orifice 410 impacts the first power element 200. The temperature at this impact point will be lower under the impact of the fluid, which is beneficial for heat dissipation of the first power element 200.

[0045] However, this design is not limited to this. In some embodiments, the fluid ejected from the jet hole 410 can directly impact the surface of the power element, so that the heat on the surface of the first power element 200 is quickly carried away by the fluid, thereby effectively reducing the temperature of the first power element 200.

[0046] In some embodiments, the flow deflector 500 is configured as a flow deflector plate, the thickness direction of the flow deflector plate is consistent with the first direction, and the flow deflector 500 is welded to the jet member 400.

[0047] In some embodiments, the power module 100 further includes a circuit board 600 disposed between the flow deflector 500 and the first power element 200, the first power element 200 being connected to the circuit board 600. The fluid ejected from the jet orifice 410 has high velocity and pressure, and direct impact on the circuit board 600 may cause physical damage. The flow deflector 500 can act as a buffer, protecting the circuit board 600 from direct impact by the fluid.

[0048] In addition, the deformation of the circuit board 600 caused by fluid impact can be reduced, so that the connection between the first power element 200 and the circuit board 600 is more stable, which is conducive to ensuring the normal operation of the first power element 200.

[0049] However, this design is not limited to this. In some other embodiments, the flow deflector 500 may be configured as a circuit board 600.

[0050] In some embodiments, the circuit board 600 is configured as a copper-clad ceramic substrate.

[0051] The copper-clad ceramic substrate has high thermal conductivity. The ceramic material itself has good thermal conductivity, and when combined with copper foil, it can quickly conduct heat away from the power components, effectively improving heat dissipation and ensuring the stable operation of the power module 100.

[0052] Copper-clad ceramic substrates have a low coefficient of thermal expansion. The low coefficient of thermal expansion of ceramic materials reduces thermal stress during temperature changes, thereby improving the reliability and lifespan of the power module 100.

[0053] The copper-clad ceramic substrate has excellent insulation properties, effectively preventing short circuits and leakage current, thus improving the safety and reliability of the power module 100. Its high insulation resistance ensures superior electrical isolation, reducing the risk of short circuits and leakage current between devices.

[0054] In some embodiments, the power module 100 further includes a heat dissipation protrusion disposed on the side of the flow deflector 500 near the jet hole 410. Thus, the heat dissipation protrusion helps to increase the contact area between the fluid and the flow deflector 500, thereby improving the heat dissipation effect on the power components.

[0055] Referring to Figure 4, in some embodiments, the flow deflector 500 and the jet member 400 are connected to jointly restrict the liquid outlet channel 700, and the jet orifice 410 is in communication with the liquid outlet channel 700.

[0056] It is understandable that the fluid ejected from the jet orifice 410 will flow out through the liquid outlet channel 700. The liquid outlet channel 700 provides a clear liquid outlet path for the fluid, which helps to reduce the probability of short circuit in the power module 100.

[0057] However, this design is not limited to this. In some other embodiments, the flow deflector 500 and the jet member 400 are spaced apart in the first direction.

[0058] In some embodiments, the liquid outlet channel 700 includes a drain chamber 710 and a first channel 720 for receiving liquid output from the drain chamber 710. The first channel 720 is arranged at an angle to the drain chamber 710, and the connection between the first channel 720 and the drain chamber 710 is smoothly transitioned.

[0059] The first flow channel 720 and the drain chamber 710 are set at an angle, and the connection is smoothly transitioned, which can effectively reduce the resistance of the fluid during the flow process. This design allows the fluid to flow more smoothly from the drain chamber 710 into the first flow channel 720, reducing energy loss. The smooth transition design can avoid the generation of eddies or turbulence at the connection, thereby improving the fluid flow efficiency and enhancing the heat dissipation effect. The smooth transition design can also reduce the pressure drop of the fluid in the flow channel.

[0060] It is worth mentioning that, in one example, a smooth transition can be achieved by setting a chamfer. Furthermore, this application does not impose any restrictions on the location and shape of the outlet end of the first flow channel 720.

[0061] Referring to Figure 3, in some embodiments, the jet component 400 is provided with a water storage cavity 810 and a second flow channel 820 for conveying liquid to the water storage cavity 810. The second flow channel 820 is set at an angle to the water storage cavity 810, and the connection between the second flow channel 820 and the water storage cavity 810 is smoothly transitioned. The jet hole 410 is opened in the cavity wall of the water storage cavity 810.

[0062] The second flow channel 820 is angled to the water storage chamber 810, and the connection is smoothly transitioned, which effectively reduces fluid resistance during flow. This design allows fluid to flow more smoothly from the second flow channel 820 into the water storage chamber 810, reducing energy loss. The smooth transition design avoids the generation of eddies or turbulence at the connection, thereby improving fluid flow efficiency and enhancing heat dissipation. The smooth transition design also reduces the pressure drop of the fluid in the flow channel.

[0063] It is worth mentioning that, in one example, a smooth transition can be achieved by setting a chamfer. Furthermore, this application does not impose any restrictions on the position and shape of the inlet end of the second flow channel 820.

[0064] In some embodiments, the second flow channel 820 is disposed on the side of the water storage cavity 810 away from the first power element 200, and in the first direction, the projection of the first power element 200 is located within the projection of the cavity wall of the water storage cavity 810. Thus, in the first direction, it is convenient to open the jet hole 410 on the cavity wall of the water storage cavity 810 at the position corresponding to the first power element 200.

[0065] In one example, the water storage cavity 810 is arranged in the shape of a quadrangular prism, and the jet hole 410 is opened on one side of the cavity wall of the water storage cavity 810, with the jet direction being the z-direction. Any two of the z, x, and y directions are perpendicular to each other. Therefore, the xy-direction position of the jet hole 410 can be made the same as the xy-direction position of the power element, which facilitates concentrated heat dissipation in the area requiring heat dissipation. Since the power module 100 used in automobiles generally has high power consumption, with the power of a single first power element 200 ranging from ten watts to two hundred watts, and due to the miniaturization of the power module 100, the xyz directions are relatively small, and heat is mainly transferred through the z-direction. That is, the heat transfer effect in the z-direction directly affects the temperature of the first power element 200. Therefore, opening the jet hole 410 at the same position as the power element in the xy direction for heat dissipation can "precisely" dissipate heat at that location.

[0066] In one example, the size of the water storage cavity 810 ranges from 2mm to 5mm in the first direction. A larger size of the water storage cavity 810 in the first direction results in a larger size of the power module 100, which reduces the flexibility of its placement within the vehicle. Conversely, a smaller size of the water storage cavity 810 in the first direction leads to greater pressure loss and poorer flow uniformity. Therefore, a size range of 2mm to 5mm for the water storage cavity 810 in the first direction allows for more flexible placement of the power module 100 within the vehicle while minimizing pressure loss and improving flow uniformity.

[0067] In some embodiments, the jet member 400 is configured to be made of metal. In one example, the jet member 400 is configured to be made of aluminum, which makes the manufacturing cost of the jet member 400 lower.

[0068] According to a second aspect of this disclosure, an electric drive system is provided, which includes the power module 100 described above. This electric drive system possesses all the beneficial effects of the power module 100 described above, which will not be elaborated further herein.

[0069] According to a third aspect of this disclosure, a vehicle is provided that includes the power module 100 described above. The vehicle possesses all the beneficial effects of the power module 100 described above, which will not be elaborated further herein.

[0070] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0071] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0072] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0073] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0074] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A power module, characterized in that, include: First power element; The first power element is arranged sequentially with a jetting component in a first direction. The jetting component is provided with jetting holes. In the first direction, the jetting holes are at least partially disposed opposite to the first power element. The jetting holes are used to spray fluid to dissipate heat from the first power element.

2. The power module according to claim 1, characterized in that, The jet orifice is provided in multiple ways, and the first power element is disposed opposite to at least one of the jet orifices.

3. The power module according to claim 1, characterized in that, The power module further includes a second power element, wherein the power of the first power element is greater than the power of the second power element.

4. The power module according to claim 1, characterized in that, The jet holes are provided in multiple ways, and the first power element is provided in multiple ways. At least some of the jet holes have different heat dissipation capabilities, and at least some of the first power elements have different power. The heat dissipation capability of the jet holes is positively correlated with the power of the corresponding first power element.

5. The power module according to claim 1, characterized in that, The power module further includes a flow deflector, and the first power element is disposed on the side of the flow deflector opposite to the jet hole.

6. The power module according to claim 5, characterized in that, The power module further includes a circuit board disposed between the flow deflector and the first power element, the first power element being connected to the circuit board; and / or, the power module further includes a heat dissipation protrusion disposed on the side of the flow deflector near the jet hole.

7. The power module according to claim 5, characterized in that, The flow-blocking component and the jetting component are connected to jointly restrict the liquid flow channel, and the jetting hole is connected to the liquid flow channel.

8. The power module according to claim 7, characterized in that, The liquid outlet channel includes a drain chamber and a first channel for receiving the liquid output from the drain chamber. The first channel is set at an angle to the drain chamber, and the connection between the first channel and the drain chamber is smoothly transitioned.

9. The power module according to claim 1, characterized in that, The jet component is provided with a water storage cavity and a second flow channel for conveying liquid to the water storage cavity. The second flow channel is set at an angle to the water storage cavity, and the connection between the second flow channel and the water storage cavity is smoothly transitioned. The jet hole is opened in the cavity wall of the water storage cavity.

10. The power module according to claim 9, characterized in that, The second flow channel is located on the side of the water storage cavity away from the first power element, and in the first direction, the projection of the first power element is located within the projection of the cavity wall of the water storage cavity.

11. An electric drive system, characterized in that, Includes the power module as described in any one of claims 1 to 10.

12. A vehicle, characterized in that, Includes the power module as described in any one of claims 1 to 10.

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