Vehicle-mounted power supply power module
By optimizing the cooling water channel layout and component connections, the problem of poor heat dissipation of the vehicle power module in a limited space was solved, achieving efficient heat dissipation and a compact design, ensuring the stability of electrical connections and ease of installation.
Patent Information
- Application Number
- CN202520464462.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-17
AI Technical Summary
In existing technologies, the layout of vehicle power modules is limited by the confined space, resulting in poor heat dissipation and affecting overall performance.
Design an on-board power module that includes cooling channels, heating components, and a power board. By optimizing the channel layout and setting up heat dissipation pads, heat dissipation columns, and inlet/outlet designs, heat transfer and cooling efficiency are improved, and the stability of electrical connections is ensured by copper busbars and rubber sealing rings.
It achieves efficient heat dissipation, compact size, safe and reliable electrical connection, optimizes the coolant flow path, and improves the heat dissipation performance and installation convenience of the vehicle power module.
Smart Images
Figure CN223928682U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cooling technology for vehicle power modules, and specifically to a power module. Background Technology
[0002] In the rapid development of the electric vehicle and new energy vehicle industry, the charging and distribution system, or on-board charger, is a key component for energy conversion and distribution in electric vehicles, and its performance and reliability are of paramount importance. To improve the overall system efficiency, especially range and operating efficiency, the industry generally pursues higher integration and superior heat dissipation performance.
[0003] Currently, to achieve efficient heat dissipation, water-cooled heat dissipation systems manufactured using die-casting technology combined with friction stir welding are widely used inside the main housing of charging and power distribution systems or on-board chargers. This combination of technologies not only improves production efficiency and ensures the structural strength and sealing of the main housing, but also significantly enhances heat dissipation efficiency through sophisticated water channel design. However, with the increasing demands for heat dissipation performance, the space occupied by the water channel design has also increased, directly leading to a severe reduction in the layout space for other critical functional modules (especially the on-board power module).
[0004] As a core component of charging and distribution systems or on-board chargers, the performance of the vehicle power module directly affects the system's energy conversion efficiency and stability. However, in existing technologies, due to the significant space occupied by water channel designs, vehicle power modules often need to be arranged within limited space. This not only restricts the size of the vehicle power module but may also affect its heat dissipation and overall performance. How to design a small-sized vehicle power module with good heat dissipation while maintaining efficient heat dissipation has become a pressing technical challenge in the design of charging and distribution systems or on-board chargers.
[0005] Therefore, it is necessary to develop a new vehicle power module. Utility Model Content
[0006] The purpose of this invention is to provide a vehicle power module that is small in size and has good heat dissipation.
[0007] The present invention discloses a vehicle power module, comprising a cooling water channel, a heating element, and a power board; the heating element and the power board are connected to the cooling water channel; the cooling water channel comprises a main water channel and a water channel cover, which are combined to form a sealed water channel;
[0008] The main waterway includes a waterway body, which has a first surface and a second surface that are disposed opposite to each other.
[0009] The first surface has a first sidewall extending in a first direction around its perimeter to form a water channel, and the water channel is sealed to a water channel cover to form a water channel.
[0010] The second surface has a second sidewall extending in a second direction opposite to the first direction around its perimeter, forming an installation space for mounting the heating component;
[0011] One end of the second surface is provided with an inlet that communicates with the water channel, and the other end of the second surface is provided with an outlet that communicates with the water channel.
[0012] Optionally, the power board includes a MOSFET, and a heat sink is positioned between the MOSFET and the cooling channel. The heat sink is placed in the small gap between the MOSFET and the cooling channel to improve heat conduction efficiency. In this scenario, the function of the heat sink is to effectively transfer the heat generated by the MOSFET to the cooling channel.
[0013] Optionally, the inner wall of the water channel cover is provided with multiple heat dissipation columns to increase the contact area with the coolant and improve heat dissipation efficiency.
[0014] Optionally, the heating element on the heating assembly is soldered to the power board via a copper busbar;
[0015] Multiple through holes for power transmission components to pass through are provided at intervals on the outer periphery of the second sidewall.
[0016] Optionally, a rubber sealing ring is provided inside the through hole of the power transmission component, and an insulating layer is provided on the outer layer of the copper busbar.
[0017] Optionally, the installation space is divided into three independent installation cavities, and each installation cavity is provided with heat dissipation material to achieve better heat dissipation.
[0018] Optionally, the inlet and outlet are respectively located at opposite ends of the second surface. This ensures that the coolant can smoothly flow into and out of the water channel. This design optimizes the coolant flow path and improves cooling efficiency.
[0019] Optionally, the second surface has an inlet sealing surface around the perimeter near the liquid inlet; the second surface also has an outlet sealing surface around the perimeter near the liquid outlet. This ensures a tight seal when the coolant flows in and out.
[0020] Optionally, a plurality of first mounting holes are provided at intervals on the outer periphery of the second sidewall for fixing and connecting other parts or components.
[0021] Optionally, a plurality of second mounting holes and a plurality of third mounting holes are provided at intervals on the outer periphery of the first sidewall for fixing and connecting other parts or components.
[0022] The beneficial effects of this utility model are:
[0023] (1) High-efficiency heat dissipation and size optimization:
[0024] This invention, by combining the design of cooling channels and a power board, enables the heat generated by the heat-generating components to be rapidly dissipated through the cooling channels, effectively improving heat dissipation efficiency. Simultaneously, by optimizing the channel layout and the integration method of the vehicle power module, it achieves rational utilization of internal space, meeting the requirements for efficient heat dissipation while ensuring the compactness of the vehicle power module and reducing the overall size.
[0025] (2) Enhanced heat conduction performance: The heat dissipation pad set between the MOSFET and the cooling water channel effectively fills the tiny gaps, improves the heat conduction efficiency, and enables the heat generated by the MOSFET to be transferred to the cooling water channel more quickly, further improving the heat dissipation performance.
[0026] (3) Increase the contact area of the coolant:
[0027] Multiple heat dissipation columns installed on the inner wall of the water channel cover increase the contact area with the coolant, thereby improving heat dissipation efficiency and allowing the coolant to absorb and carry away heat more fully.
[0028] (4) Safe and reliable electrical connections:
[0029] The heating elements on the heating assembly are soldered to the power board via copper busbars, ensuring the stability and reliability of the electrical connection. Meanwhile, the rubber sealing rings inside the vias of the power transmission components and the insulation layer on the outer layer of the copper busbars effectively prevent electrical short circuits and leakage risks, improving safety.
[0030] (5) Optimized coolant flow path:
[0031] The inlet and outlet are located at opposite ends of the second side, ensuring that the coolant can flow smoothly into and out of the water channel, optimizing the flow path of the coolant and improving cooling efficiency.
[0032] (6) Good sealing performance:
[0033] The second side has inlet sealing surfaces and outlet sealing surfaces around the liquid inlet and outlet, respectively, to ensure the sealing of the coolant during inflow and outflow, prevent coolant leakage, and ensure the stable operation of the system.
[0034] (7) Easy to install and fix:
[0035] Multiple first mounting holes are provided at intervals on the outer periphery of the second sidewall, and multiple second and third mounting holes are provided at intervals on the outer periphery of the first sidewall. The design of these mounting holes facilitates the fixed connection of other parts or components, improving the convenience and stability of installation.
[0036] In summary, the vehicle power module of this utility model, through its unique design and optimization, achieves technical effects such as efficient heat dissipation, enhanced heat conduction performance, increased coolant contact area, safe and reliable electrical connection, optimized coolant flow path, good sealing performance, and easy installation and fixing. Attached Figure Description
[0037] Figure 1 This is an analytical diagram of the vehicle power module described in the embodiments of this application;
[0038] Figure 2 This is an analytical diagram of the cooling water channel described in the embodiments of this application;
[0039] Figure 3 This is one of the structural schematic diagrams of the main waterway described in the embodiments of this application;
[0040] Figure 4 This is a second schematic diagram of the main waterway structure described in the embodiments of this application;
[0041] Figure 5 This is a schematic diagram of the structure of the waterway cover plate described in the embodiments of this application;
[0042] Figure 6 This is a schematic diagram of the waterway structure in an embodiment of this application;
[0043] Figure 7 This is a schematic diagram of the structure of the heating component in the embodiments of this application;
[0044] Figure 8 This is a schematic diagram of the power board structure in an embodiment of this application;
[0045] Figure 9 This is a schematic diagram showing the interaction of the cooling water channel, heat-generating component, heat sink, and MOSFET in the embodiments of this application;
[0046] Figure 10 This is a schematic diagram illustrating the fit between the copper busbar and the rubber sealing ring in an embodiment of this application.
[0047] Figure 11 This is a schematic diagram showing the fit between the copper busbar, rubber sealing ring, and cooling water channel in an embodiment of this application;
[0048] In the diagram: 1. Cooling water channel; 11. Main water channel; 110. Liquid inlet; 111. First mounting hole; 112. Liquid outlet; 113. Water inlet sealing surface; 114. Mounting cavity; 115. Water outlet sealing surface; 116. Second mounting hole; 117. Third mounting hole; 118. Power transmission component through hole; 119. Water channel groove; 12. Water channel cover; 121. Heat dissipation column; 13. Water channel; 2. Heating component; 21. Heating element; 22. First heat dissipation element; 23. Second heat dissipation element; 24. Bracket; 25. Copper busbar; 26. Insulation layer; 3. Rubber sealing ring; 4. Heat dissipation pad; 5. Power board; 51. MOSFET. Detailed Implementation
[0049] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.
[0050] like Figure 1 As shown in the embodiment of this application, a vehicle power module includes a cooling water channel 1, a heating component 2, and a power board 5; the heating component 2 and the power board 5 are connected to the cooling water channel 1.
[0051] like Figure 2 and Figure 6 As shown in the embodiment of this application, the cooling water channel 1 includes a main water channel 11 and a water channel cover plate 12, which together form a closed water channel 13.
[0052] like Figures 3 to 5 As shown in the embodiment of this application, the main waterway 11 includes a waterway body, which has a first surface and a second surface disposed opposite to each other. The periphery of the first surface has a first sidewall extending in a first direction, forming a waterway groove 119. The waterway groove 119 is sealed to the waterway cover plate 12 to form a waterway 13. The periphery of the second surface has a second sidewall extending in a second direction opposite to the first direction, forming an installation space for mounting the heating element 2. One end of the second surface has an inlet 110 communicating with the waterway groove 119, and the other end of the second surface has an outlet 112 communicating with the waterway groove 119.
[0053] like Figures 2 to 4As shown in the embodiment of this application, a water channel 119 is formed by extending the first sidewall in a first direction, and an installation space is formed by extending the second sidewall in the opposite direction. That is, by extending the sidewalls in both directions, the water channel 13 and the installation space are separated and integrated into the same body, avoiding the volume redundancy caused by multi-layer stacking in traditional designs. Moreover, the installation space and the water channel 13 share the same water channel body, reducing additional support structures and significantly compressing the overall size.
[0054] like Figure 3 As shown, in one possible embodiment, the installation space is divided into three independent mounting cavities 114, and each mounting cavity 114 is provided with heat dissipation material. This partitioned design of the installation space avoids mechanical interference between components, reduces reliance on installation accuracy, and further simplifies the structure. The heat dissipation material in each mounting cavity 114 facilitates rapid heat dissipation from the heat-generating component 2.
[0055] like Figure 3 As shown, in one possible embodiment, the inlet 110 and outlet 112 are respectively located at opposite ends of the second surface. Placing the inlet 110 and outlet 112 at opposite ends of the second surface forms a diagonal flow channel. Coolant flows in from one end and out from the other, forming a long-distance unidirectional flow path, avoiding localized stagnant areas and ensuring that the coolant fully covers the entire water channel 119.
[0056] like Figure 3 and Figure 4 As shown, in one possible embodiment, the second surface has an inlet sealing surface 113 around the perimeter near the liquid inlet 110; and an outlet sealing surface 115 around the perimeter near the liquid outlet 112. The design of the inlet sealing surface 113 and the outlet sealing surface 115 ensures stable flow channel pressure and avoids leakage that could lead to a decrease in heat dissipation efficiency.
[0057] like Figure 3 and Figure 4 As shown, in one possible embodiment, a plurality of first mounting holes 111 are provided at intervals on the outer periphery of the second sidewall for fixing and connecting other parts or components.
[0058] like Figure 3 and Figure 4 As shown, in one possible embodiment, a plurality of second mounting holes 116 and a plurality of third mounting holes 117 are provided at intervals on the outer periphery of the first sidewall. These are used for fixing and connecting other parts or components.
[0059] like Figure 5As shown, in one possible embodiment, the inner wall of the water channel cover 12 is provided with multiple heat dissipation columns 201. The arrangement of the heat dissipation columns 201 increases the contact area with the coolant, improving heat transfer efficiency. Simultaneously, the heat dissipation columns 201 can disrupt the laminar flow of the coolant, enhancing turbulence and accelerating the transfer of heat from the water channel wall to the liquid.
[0060] like Figure 7 As shown, in one possible embodiment, the heating component 2 includes a first heat dissipation element 22 and a second heat dissipation element 23 in addition to the heating element 21. The heating element 21 is fixed by the bracket 24, and the heating element 21, the first heat dissipation element 22 and the second heat dissipation element 23 are constrained to move in the up-down, front-back and left-right directions.
[0061] like Figure 8 As shown, in one possible embodiment, a MOSFET 51 is provided on the power board 5, and a heat dissipation pad 4 is provided between the MOSFET 51 and the cooling channel 1. The heat dissipation pad 4 is disposed in the small gap between the MOSFET 51 and the cooling channel 1 to improve heat conduction efficiency. In this scenario, the function of the heat dissipation pad 4 is to effectively transfer the heat generated by the MOSFET 51 to the cooling channel 1.
[0062] like Figure 7 , Figure 10 and Figure 11 As shown, in one possible embodiment, the heating element 21 on the heating assembly 2 is welded to the power board 5 via a copper busbar 25. Multiple power transmission component vias 118 are spaced apart on the outer periphery of the second sidewall for the copper busbar 25 to pass through. High-heat components such as the copper busbar 25 can be directly embedded into the mounting space through the power transmission component vias 118, with their heating parts in close contact with the main water channel body, allowing heat to be rapidly conducted to the coolant through the water channel body.
[0063] like Figure 11 As shown, in one possible embodiment, a rubber sealing ring 3 is provided inside the through-hole 118 of the power transmission component. The rubber sealing ring 3 serves to seal and insulate the mounting cavity 114 when heat dissipation material is poured into each mounting cavity 114. To achieve better insulation, an insulating layer 26 is also provided on the outer layer of the copper busbar 25.
[0064] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.
Claims
1. A vehicle-mounted power module, comprising a cooling water channel (1), a heating element (2), and a power board (5); wherein the heating element (2) and the power board (5) are connected to the cooling water channel (1); characterized in that, The cooling water channel (1) includes a main water channel (11) and a water channel cover (12), which together form a closed water channel (13). The main waterway (11) includes a waterway body, which has a first surface and a second surface that are disposed opposite to each other. The first surface has a first sidewall extending in a first direction around its perimeter to form a water channel (119), which is sealed to a water channel cover (12) to form a water channel (13). The second surface has a second sidewall extending in a second direction opposite to the first direction around its perimeter, forming an installation space for mounting the heating component (2); One end of the second surface is provided with an inlet (110) that communicates with the water channel (119), and the other end of the second surface is provided with an outlet (112) that communicates with the water channel (119).
2. The vehicle-mounted power module according to claim 1, characterized in that, The power board (5) is provided with a MOS transistor (51), and a heat dissipation pad (4) is provided between the MOS transistor (51) and the cooling water channel (1).
3. The vehicle-mounted power module according to claim 1, characterized in that, The inner wall of the waterway cover (12) is provided with multiple heat dissipation columns (121).
4. The vehicle-mounted power module according to claim 1, characterized in that, The heating element (21) on the heating assembly (2) is welded to the power board (5) via a copper busbar (25); Multiple power transmission component vias (118) for copper busbars (25) to pass through are provided at intervals on the outer periphery of the second sidewall.
5. The vehicle-mounted power module according to claim 4, characterized in that, The power transmission component through hole (118) is provided with a rubber sealing ring (3), and the copper busbar (25) is provided with an insulating layer (26) on its outer layer.
6. The vehicle-mounted power module according to claim 1, characterized in that, The installation space is divided into three independent installation cavities (114), and each installation cavity (114) is provided with heat dissipation material.
7. The vehicle-mounted power module according to claim 1, characterized in that, The inlet (110) and outlet (112) are respectively located at opposite ends of the second surface.
8. The vehicle power module according to claim 1, characterized in that: The second surface has a water inlet sealing surface (113) around the liquid inlet (110); the second surface has a water outlet sealing surface (115) around the liquid outlet (112).
9. The vehicle-mounted power module according to claim 1, characterized in that, A plurality of first mounting holes (111) are provided at intervals on the outer periphery of the second sidewall.
10. The vehicle-mounted power module according to claim 1, characterized in that, A plurality of second mounting holes (116) and a plurality of third mounting holes (117) are provided at intervals on the outer periphery of the first sidewall.