Heat dissipation structure of dual-motor controller
Patent Information
- Application Number
- CN202521853404.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-08-29
AI Technical Summary
[0003] The technical problem to be solved by this technical solution is how to provide a heat dissipation structure that can effectively cool down a functional module with high heat density that integrates SiC-MOSFET power devices, so as to reduce the overall thermal resistance of the functional module and improve its thermal conductivity.
Smart Images
Figure CN224653838U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of heat dissipation for electronic components, and in particular to a heat dissipation structure for a dual-motor controller used in a power unit with a range extender. Background Technology
[0002] Currently, power devices (such as chips) based on SiC-MOSFET (silicon carbide metal-oxide-semiconductor field-effect transistor) technology have been widely used in clean energy vehicles and other fields. Compared with power devices based on IGBT (insulated gate bipolar transistor) technology, SiC-MOSFET-based power devices have advantages such as smaller size, lower on-resistance, and higher voltage withstand. For example, a 1200V / 150A fourth-generation silicon-based IGBT chip has an area of approximately 142mm². 2 However, a similar 13mΩ silicon carbide chip has an area of only 30mm². 2 It is approximately one-fifth of the former. However, the heat density of power devices based on SiC-MOSFET technology increases dramatically due to their reduced size, requiring a 3 to 7-fold increase in thermal conductivity per unit area under the same power conditions. Therefore, providing a better heat dissipation structure for SiC-MOSFET power devices has become one of the urgent technical problems to be solved in the industry. Utility Model Content
[0003] The technical problem to be solved by this technical solution is how to provide a heat dissipation structure that can effectively cool down a functional module with high heat density that integrates SiC-MOSFET power devices, so as to reduce the overall thermal resistance of the functional module and improve its thermal conductivity.
[0004] To address the aforementioned technical issues, this technical solution employs liquid cooling technology and a high-turbulence structural design to generate a greater turbulence effect in the coolant, allowing the heat exchange area to come into contact with more coolant, thereby improving the heat dissipation efficiency of the functional modules. To this end, this technical solution provides a heat dissipation structure for a dual-motor controller, comprising: a dual-motor controller, a vapor chamber, and a coolant tank. The dual-motor controller is positioned on the upper side of the vapor chamber. The coolant tank has a cavity for holding coolant, with coolant inlets and outlets communicating with the cavity on its two opposite sidewalls. The upper part of the coolant tank has an open opening communicating with the cavity. The lower side of the vapor chamber is uniformly provided with multiple heat dissipation protrusions corresponding to the cavity. When the vapor chamber covers and is integrated with the open opening of the coolant tank, these multiple heat dissipation protrusions are contained within the coolant flowing through the cavity via the coolant inlets and outlets. Accordingly, the multiple heat dissipation bumps can not only generate a greater turbulence effect in the coolant flowing through the cavity, prolonging the residence time of the coolant in the cavity and ensuring full contact between the coolant and the surface of the heat dissipation bumps, but also significantly increase the effective heat exchange area on the lower side of the heat exchange plate. This allows the high-density heat generated by the dual-motor controller to be rapidly transferred to the coolant through the heat exchange plate and the multiple heat dissipation bumps, thereby improving heat dissipation efficiency.
[0005] As another implementation of this technical solution, the dual-motor controller is mainly composed of a motor controller using SiC-MOSFET power devices and a range extender controller electrically connected together. The motor controller and the range extender controller are separated by a gap and are set on the upper side of the heat spreader. The motor controller is electrically connected to the battery and the motor to control the battery to output electrical energy to the motor, while the range extender controller is electrically connected to the range extender and the battery to control the range extender to output electrical energy to the battery and / or to the motor.
[0006] As another implementation of this technical solution, the heat dissipation bump is rectangular, and the sidewall of one of the smallest areas of the heat dissipation bump is fixedly connected to the lower side of the heat spreader plate. The lower side of the heat spreader plate is divided into a motor control cooling area, a range extender control cooling area, and a spacing cooling area, corresponding to the motor controller, the range extender controller, and the distance between the two controllers. The heat dissipation bumps located in the motor control cooling area and the range extender control cooling area are evenly divided into multiple rows along the direction from the coolant inlet to the coolant outlet, and each row contains several heat dissipation bumps spaced at equal intervals. The two largest areas of the sidewalls of the heat dissipation bumps in each row face the direction of the coolant inlet and the coolant outlet, respectively, and the heat dissipation bumps in each row are arranged in an alternating pattern. The heat dissipation bumps located in the spacing cooling area are spaced at equal intervals, and the two largest areas of the sidewalls of the heat dissipation bumps are arranged parallel to the direction from the coolant inlet to the coolant outlet. Accordingly, based on the characteristic that the motor control cooling zone and the range extender control cooling zone will concentrate a lot of heat, the sidewalls of the largest area of several heat dissipation bumps in these two cooling zones are set in the direction of coolant flow, and the heat dissipation bumps in each row are arranged in an alternating pattern. This allows the coolant flowing through these two cooling zones to generate a large turbulence effect between the heat dissipation bumps, thereby specifically and quickly absorbing the heat energy on the lower side of the heat spreader and the heat dissipation bumps in these two cooling zones. In contrast, the spacing cooling zone has less heat than the two cooling zones. The sidewalls of the largest area of several heat dissipation bumps in this cooling zone are set parallel to the direction from the coolant inlet to the coolant outlet. This allows the coolant to flow quickly through this cooling zone and absorb the heat energy on the lower side of the heat spreader and the heat dissipation bumps in this cooling zone.
[0007] As another implementation of this technical solution, the heat dissipation bump is rectangular, and the sidewall of one of the smallest areas of the heat dissipation bump is fixedly connected to the lower side of the heat spreader plate. A baffle wall is provided inside the cavity corresponding to the distance between the motor controller and the range extender controller, dividing the cavity into a motor control cooling cavity and a range extender control cooling cavity. The coolant inlet is connected to the side of the motor control cooling cavity and the range extender control cooling cavity adjacent to the coolant inlet via an inlet pipe opened inside the coolant tank. The coolant outlet is connected to the motor control cooling cavity and the range extender control cooling cavity via an outlet pipe opened inside the coolant tank. The cooling chamber is connected to the side near the coolant outlet. The lower side of the vapor chamber is divided into a motor control cooling area and a range extender control cooling area, corresponding to the motor control cooling chamber and the range extender control cooling chamber, respectively. Several heat dissipation protrusions located in the motor control cooling area and the range extender control cooling area are evenly divided into multiple rows along the direction from the coolant inlet to the coolant outlet. Each row contains several heat dissipation protrusions spaced at equal intervals. The two sidewalls with the largest area of each row of heat dissipation protrusions face the coolant inlet and coolant outlet, respectively, and the heat dissipation protrusions in each row are arranged in a staggered pattern. Therefore, since the temperature of the coolant entering the motor control cooling chamber and the range extender control cooling chamber is basically the same, the coolant has the same cooling efficiency for both the motor controller and the range extender controller. Compared to the structure where the coolant temperature gradually increases and the cooling efficiency gradually decreases along the flow direction in a single chamber, the structure with two cooling chambers connected in parallel provides higher cooling efficiency for both the motor controller and the range extender controller.
[0008] As another implementation of this technical solution, the diameter of the inlet pipe is larger than the diameter of the outlet pipe. This increases the kinetic energy of the coolant flowing out of the cooling chamber, thereby preventing coolant flowing from one cooling chamber from entering another.
[0009] In another implementation of this technical solution, the vapor chamber and the heat dissipation bumps are integrally formed. This improves the heat transfer effect between the vapor chamber and the heat dissipation bumps.
[0010] In another implementation of this technical solution, the vapor chamber and heat dissipation bumps are made of copper or aluminum alloy. This ensures that the vapor chamber and heat dissipation bumps have high thermal conductivity.
[0011] As another implementation of this technical solution, the periphery of the heat exchange plate is evenly provided with multiple through holes penetrating the upper and lower sides of the heat exchange plate. The circumferential sidewall of the coolant tank is provided with multiple screw holes corresponding to the multiple through holes. Multiple bolts are inserted through the multiple through holes and screwed into the multiple screw holes to fix the heat exchange plate to the opening of the coolant tank.
[0012] As another implementation of this technical solution, the heat dissipation structure further includes: an annular sealing gasket, wherein an annular groove is recessed on the outer edge of the open end of the coolant tank, and the annular sealing gasket is embedded in the annular groove. This ensures the airtightness of the heat spreader and the coolant tank during their connection and fixation.
[0013] As another implementation of this technical solution, the heat dissipation structure further includes a protective cover, which is installed on the upper side of the heat spreader and covers the dual-motor controller inside it. This provides effective protection for the dual-motor controller. Attached Figure Description
[0014] Figure 1 This is a three-dimensional external view of an embodiment of the heat dissipation structure of the dual-motor controller of this utility model; Figure 2 for Figure 1 The diagram shows an exploded view of the components of the embodiment shown. Figure 3 for Figure 1 The illustrated embodiment shows a schematic diagram of the lower side of the heat spreader; Figure 4 This is a schematic diagram showing the electrical connection between the dual-motor controller and peripheral components in this utility model; Figure 5 This is a top sectional view of the coolant tank in another embodiment of the heat dissipation structure of the dual-motor controller of this utility model. Figure 6 This is a schematic diagram showing the lower side of the temperature distribution plate in another embodiment of the present invention.
[0015] Explanation of symbols in the attached diagram: 1 Dual motor controller; 11 Motor controller; 12 Range extender controller; 13 Motor; 14 Range extender; 15 Battery; 2 Heat spreader; 21 Through hole; 22 Motor control cooling area; 23 Range extender control cooling area; 24 Spacing cooling area; 3 Heat dissipation bump; 4 Coolant tank; 41 Cavity; 411 Baffle; 412 Motor control cooling chamber; 413 Range extender control cooling chamber; 42 Coolant inlet; 421 Inlet pipe; 43 Coolant outlet; 431 Outlet pipe; 44 Opening; 45 Screw hole; 46 Bolt. Detailed Implementation
[0016] The detailed description and technical content of this utility model are explained below with reference to the accompanying drawings. However, the accompanying drawings are provided for reference and illustration only and are not intended to limit this utility model.
[0017] In the context of this specification, any two or more embodiments of this utility model can be arbitrarily combined, and the resulting technical solutions are part of the original disclosure of this specification and also fall within the protection scope of this utility model.
[0018] like Figure 1 , 2 Figure 3 shows a schematic diagram of a specific embodiment of the heat dissipation structure of the dual-motor controller of this utility model. The heat dissipation structure of the dual-motor controller (hereinafter referred to as the heat dissipation structure) mainly includes a dual-motor controller 1, a heat spreader 2, and a coolant tank 4. Combined with... Figure 4 As shown, the dual-motor controller 1 in this utility model is a controller used to control the power output of the drive motor 13 and the electrical energy output of the generator in the range extender 14. The dual-motor controller 1 mainly consists of a motor controller 11 using SiC-MOSFET power devices (processor chips), a range extender controller 12, and corresponding storage elements and electronic components (not shown in the figure), all arranged on a substrate and electrically connected. The dual-motor controller 1 can be formed by electrically connecting two independent boards (substrates), or it can be formed by integrating the above components on a single substrate. Since various architectures of the dual-motor controller 1 have been widely used in the field of clean energy vehicles, especially in hybrid vehicles using range extenders, and since this utility model does not improve the architecture of the dual-motor controller 1, but only designs a heat dissipation structure with better heat dissipation performance for the dual-motor controller 1, the architecture of the dual-motor controller 1 will not be described in detail in this solution. Figure 2 As shown, this solution is illustrated by exemplifying that the motor controller 11 and the range extender controller 12 are independently mounted on two separate substrates and electrically connected. For ease of illustration, the two boards containing the motor controller 11 and the range extender controller 12 are referred to as the motor controller 11 and the range extender controller 12, respectively. Furthermore, the motor controller 11 and the range extender controller 12 are spaced apart and are mounted on the upper side of the heat spreader 2 using fasteners (such as bolts, not shown) and thermal grease. The motor controller 11 is electrically connected to the battery 15 and the motor 13 to control the battery 15 to output electrical energy to the motor 13. The range extender controller 12 is electrically connected to the range extender 14 and the battery 15 to control the range extender 14 to output electrical energy to the battery 15 and / or to the motor 13. Additionally, a protective cover (not shown in the figure) can be installed on the upper side of the heat spreader 2 to enclose the dual-motor controller 1, thereby providing good protection for the dual-motor controller 1. Figure 2As shown, the coolant tank 4 has a cavity 41 for holding coolant inside. Two opposite side walls of the coolant tank 4 are respectively provided with a coolant inlet 42 and a coolant outlet 43 communicating with the cavity 41. The upper part of the coolant tank 4 forms an open opening 44 communicating with the cavity 41. The lower side of the heat spreader 2 is uniformly provided with multiple heat dissipation protrusions 3 corresponding to the cavity 41. These heat dissipation protrusions 3 can be combined with the heat spreader 2 by welding or other methods. However, the heat spreader 2 and the heat dissipation protrusions 3 can also be integrally formed to improve the heat transfer effect between them. Furthermore, the heat spreader 2 and the heat dissipation protrusions 3 can be made of copper or aluminum alloy to ensure high thermal conductivity. When the heat spreader 2 covers and is combined with the open opening 44 of the coolant tank 4, the multiple heat dissipation protrusions 3 are contained in the coolant flowing through the cavity 41 via the coolant inlet 42 and coolant outlet 43.
[0019] More specifically, such as Figure 2 As shown, the periphery of the heat exchanger 2 is evenly provided with multiple through holes 21 penetrating the upper and lower sides of the heat exchanger 2. The circumferential sidewall of the coolant tank 4 is provided with multiple screw holes 45 corresponding to the multiple through holes 21. Figure 1 As shown, multiple bolts 46 are threaded through the multiple through holes 21 and screwed into the multiple screw holes 45 to fix the heat spreader 2 to the opening 44 of the coolant tank 4. In addition, an annular groove (not shown) can be recessed on the outer edge of the opening 44 of the coolant tank 4, and an annular sealing gasket (not shown) is embedded in the annular groove to ensure the sealing of the heat spreader 2 and the coolant tank 4.
[0020] In this embodiment, combined with Figure 3As shown, the heat dissipation bump 3 is rectangular, and one of the smallest area sidewalls of the heat dissipation bump 3 is fixedly connected to the lower side of the heat spreader 2. The lower side of the heat spreader 2 is divided into a motor control cooling zone 22, a range extender control cooling zone 23, and a spacing cooling zone 24, corresponding to the distance between the motor controller 11, the range extender controller 12, and the two controllers. Several heat dissipation bumps 3 located in the motor control cooling zone 22 and the range extender control cooling zone 23 are evenly divided into multiple rows along the direction from the coolant inlet 42 to the coolant outlet 43, and each row contains several heat dissipation bumps 3 spaced at equal intervals. The two largest area sidewalls of the heat dissipation bumps 3 in each row face the coolant inlet 42 and the coolant outlet 43, respectively, and the heat dissipation bumps 3 in each row are arranged in an alternating pattern. The several heat dissipation bumps 3 located in the spacing cooling zone 24 are spaced at equal intervals, and the two largest area sidewalls of the heat dissipation bumps 3 are arranged parallel to the direction from the coolant inlet 42 to the coolant outlet 43. Accordingly, based on the characteristic that the motor control cooling zone 22 and the range extender control cooling zone 23 will concentrate a lot of heat, the sidewalls of the largest area of several heat dissipation protrusions 3 in these two cooling zones are arranged facing the direction of coolant flow, and the several heat dissipation protrusions 3 in each row are arranged in a staggered manner. This allows the coolant flowing through these two cooling zones to generate a large turbulence effect between the heat dissipation protrusions 3, thereby specifically and quickly absorbing the heat energy on the lower side of the heat spreader 2 and the heat dissipation protrusions 3 in these two cooling zones. In contrast, the spacing cooling zone 24 has less heat than the above two cooling zones. The sidewalls of the largest area of several heat dissipation protrusions 3 in this cooling zone are arranged parallel to the direction from the coolant inlet 42 to the coolant outlet 43, allowing the coolant to flow quickly through this cooling zone and absorb the heat energy on the lower side of the heat spreader 2 and the heat dissipation protrusions 3 in this cooling zone.
[0021] Combination Figure 5 and 6As shown, this is another embodiment of the present invention. In this embodiment, the only difference from the previous embodiment is the arrangement of the cavity and the heat dissipation protrusions; all other structures are the same. In this embodiment, the heat dissipation protrusion 3 is still rectangular, and one of the smallest sidewalls of the heat dissipation protrusion 3 is fixedly connected to the lower side of the heat spreader 2. The cavity 41 has a baffle 411 corresponding to the distance between the motor controller 11 and the range extender controller 12, dividing the cavity 41 into a motor control cooling cavity 412 and a range extender control cooling cavity 413. The coolant inlet 42 is connected to the side of the motor control cooling cavity 412 and the range extender control cooling cavity 413 adjacent to the coolant inlet 42 via an inlet pipe 421 opened inside the coolant tank 4. The coolant outlet 43 is connected to the side of the motor control cooling cavity 412 and the range extender control cooling cavity 413 adjacent to the coolant outlet 43 via an outlet pipe 431 opened inside the coolant tank 4. The lower side of the heat spreader 2 is divided into a motor control cooling zone 22 and a range extender control cooling zone 23, corresponding to the motor control cooling chamber 412 and the range extender control cooling chamber 413, respectively. Several heat dissipation protrusions 3 located in the motor control cooling zone 22 and the range extender control cooling zone 23 are evenly divided into multiple rows along the direction from the coolant inlet 42 to the coolant outlet 43, and each row contains several heat dissipation protrusions 3 spaced at equal intervals. The two sidewalls with the largest area of each row of heat dissipation protrusions 3 face the coolant inlet 42 and the coolant outlet 43, respectively, and the heat dissipation protrusions 3 in each row are arranged in an alternating pattern. Therefore, since the temperatures of the coolant entering the motor control cooling chamber 412 and the range extender control cooling chamber 413 are basically the same, the coolant in the two cooling chambers has the same cooling efficiency for the motor controller 11 and the range extender controller 12. Compared to the structure where the coolant temperature gradually increases and the cooling efficiency gradually decreases along the flow direction in a single chamber 41, the structure with two cooling chambers connected in parallel has a higher cooling efficiency for the motor controller 11 and the range extender controller 12. In addition, in this embodiment, the diameter of the inlet pipe 421 can be set to be larger than the diameter of the outlet pipe 431, thereby increasing the kinetic energy of the coolant flowing out of the cooling chamber and preventing coolant flowing out of either cooling chamber from entering the other cooling chamber.
[0022] In summary, the arrangement of the multiple heat dissipation bumps in this invention not only generates a greater turbulence effect in the coolant flowing through the cavity, prolonging the residence time of the coolant in the cavity and ensuring full contact between the coolant and the surface of the heat dissipation bumps, but also significantly increases the effective heat exchange area on the lower side of the heat exchange plate. This allows the high-density heat generated by the dual-motor controller to be rapidly transferred to the coolant through the heat exchange plate and the multiple heat dissipation bumps, thereby improving the heat dissipation efficiency of the heat dissipation structure.
[0023] The above are merely preferred embodiments of the present utility model and are not intended to limit the patent scope of the present utility model. Other equivalent changes made using the patent concept of the present utility model should all fall within the patent protection scope of the present utility model.
Claims
1. A heat dissipation structure for a dual-motor controller, comprising: The device comprises a dual-motor controller, a vapor chamber, and a coolant tank. The dual-motor controller is disposed on the upper side of the vapor chamber. The coolant tank has an internal cavity for holding coolant. Two opposite side walls of the coolant tank are respectively provided with a coolant inlet and a coolant outlet communicating with the cavity. The upper part of the coolant tank has an open opening communicating with the cavity. The device is characterized in that a plurality of heat dissipation protrusions are evenly provided on the lower side of the vapor chamber corresponding to the cavity. When the vapor chamber covers and is attached to the open opening of the coolant tank, the plurality of heat dissipation protrusions are accommodated in the coolant flowing through the cavity via the coolant inlet and coolant outlet.
2. The heat dissipation structure according to claim 1, characterized in that, The dual-motor controller mainly consists of a motor controller using SiC-MOSFET power devices and a range extender controller electrically connected together. The motor controller and the range extender controller are disposed on the upper side of the heat spreader plate with a gap between them. The motor controller is electrically connected to the battery and the motor to control the battery to output electrical energy to the motor, while the range extender controller is electrically connected to the range extender and the battery to control the range extender to output electrical energy to the battery and / or to the motor.
3. The heat dissipation structure according to claim 2, characterized in that, The heat dissipation bump is rectangular, and the sidewall of one of the smallest areas of the heat dissipation bump is fixedly connected to the lower side of the heat spreader plate. The lower side of the heat spreader plate is divided into a motor control cooling area, a range extender control cooling area, and a spacing cooling area, corresponding to the motor controller, the range extender controller, and the spacing. Several heat dissipation bumps located in the motor control cooling area and the range extender control cooling area are evenly divided into multiple rows along the direction from the coolant inlet to the coolant outlet, and each row contains several heat dissipation bumps spaced at equal intervals. The two largest areas of the sidewalls of the heat dissipation bumps in each row face the direction of the coolant inlet and the coolant outlet, respectively, and the heat dissipation bumps in each row are arranged in an alternating pattern. The several heat dissipation bumps located in the spacing cooling area are spaced at equal intervals, and the two largest areas of the sidewalls of the heat dissipation bumps are arranged parallel to the direction from the coolant inlet to the coolant outlet.
4. The heat dissipation structure according to claim 2, characterized in that, The heat dissipation bump is rectangular, and the sidewall with the smallest area of the heat dissipation bump is fixedly connected to the lower side of the heat spreader. The cavity has a baffle wall corresponding to the spacing, which divides the cavity into a motor control cooling cavity and a range extender control cooling cavity. The coolant inlet is connected to the side of the motor control cooling cavity and the range extender control cooling cavity adjacent to the coolant inlet via an inlet pipe opened inside the coolant tank. The coolant outlet is connected to the side of the motor control cooling cavity and the range extender control cooling cavity adjacent to the coolant inlet via an outlet pipe opened inside the coolant tank. The side near the coolant outlet is connected. The lower side of the heat spreader is divided into a motor control cooling area and a range extender control cooling area, corresponding to the motor control cooling chamber and the range extender control cooling chamber, respectively. Several heat dissipation bumps located in the motor control cooling area and the range extender control cooling area are evenly divided into multiple rows along the direction from the coolant inlet to the coolant outlet. Each row contains several heat dissipation bumps spaced at equal intervals. The two sidewalls with the largest area of each row of heat dissipation bumps face the direction of the coolant inlet and the coolant outlet, respectively. The heat dissipation bumps in each row are arranged in an alternating pattern.
5. The heat dissipation structure according to claim 4, characterized in that, The diameter of the inlet pipe is larger than the diameter of the outlet pipe.
6. The heat dissipation structure according to claim 1, characterized in that, The heat dissipation plate and the heat dissipation bump are integrally formed.
7. The heat dissipation structure according to claim 1, characterized in that, The heat spreader and the heat dissipation bump are made of copper or aluminum alloy.
8. The heat dissipation structure according to claim 1, characterized in that, The temperature distribution plate has multiple through holes evenly distributed around its periphery, penetrating the upper and lower sides of the temperature distribution plate. The circumferential sidewall of the coolant tank has multiple screw holes corresponding to the multiple through holes. Multiple bolts are inserted through the multiple through holes and screwed into the multiple screw holes to fix the temperature distribution plate to the opening of the coolant tank.
9. The heat dissipation structure according to claim 1, characterized in that, Also includes: An annular sealing gasket is provided, wherein an annular groove is recessed on the outer edge of the opening of the coolant tank, and the annular sealing gasket is embedded in the annular groove.
10. The heat dissipation structure according to claim 1, characterized in that, Also includes: A protective cover is installed on the upper side of the temperature distribution plate and covers the dual-motor controller inside it.