Motor controller with double-sided capacitor heat dissipation
By adopting a double -sided capacitor cooling design in the motor controller, the problem of uneven heat dissipation of the capacitor module is solved, and the more efficient heat dissipation effect is achieved, the volume and capacity of the capacitor module is reduced, and the cost is reduced.
Patent Information
- Application Number
- CN202420259838.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-02-02
AI Technical Summary
The existing motor controllers have uneven problems in the heat dissipation design of the capacitor module, resulting in a higher temperature in the area where the capacitor module deviates from the heat dissipation channel.
The double -sided capacitance design is adopted, and the top surface and bottom surface of the capacitor module are used to set the capacitance sealing slot and the main and secondary sewer cover in the shell.
The heat dissipation efficiency of the capacitor module is enhanced, the capacity and volume of the capacitor module reduces the capacity of the capacitor module, and reduces the cost of use.
Smart Images
Figure CN222421652U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor controllers, in particular to a motor controller with double-sided capacitor heat dissipation. Background Art
[0002] With the rapid development of new energy vehicle motor controllers, new energy motor controllers are becoming increasingly integrated and miniaturized. Motor controllers are mainly composed of power modules, capacitor modules, heat dissipation channels, shells, etc. The integration of the above modules determines the overall cost, structure, heat dissipation efficiency, etc. of the controller. Good heat dissipation of the capacitor module can effectively reduce the volume and capacitance required by the capacitor module, making it easier to achieve miniaturization, high power density and platformization of the motor controller.
[0003] In the prior art, the heat dissipation design of the motor controller for the capacitor module is mainly to place one side of the capacitor module close to the heat dissipation water channel for heat dissipation. Therefore, the capacitor module will have the problem of uneven heat dissipation, and the area behind the discrete hot water channel in the capacitor module will have a higher temperature. Utility Model Content
[0004] In order to overcome the above technical defects, the purpose of the utility model is to provide a motor controller with double-sided capacitor heat dissipation, which is used for double-sided heat dissipation of capacitor modules.
[0005] The utility model discloses a motor controller with double-sided capacitor heat dissipation, comprising a housing, a capacitor module, a power module, a main water channel cover plate and a secondary water channel cover plate.
[0006] A capacitor potting groove is provided in the housing, the capacitor potting groove comprises a limiting side wall and a limiting bottom plate, the capacitor module is arranged in the capacitor potting groove, and the bottom surface of the capacitor module is in contact with the limiting bottom plate;
[0007] The main water channel cover plate is arranged above the capacitor module, the top surface of the main water channel cover plate is recessed to arrange the main water channel, and the main water channel covers the capacitor module in the vertical direction; the power module is arranged above the main water channel cover plate, and the power module covers the main water channel in the vertical direction;
[0008] A water inlet pipe and a water outlet pipe respectively connected to the outside of the shell are provided in the shell, and the water inlet pipe and the water outlet pipe are respectively arranged outside the two ends of the capacitor potting groove;
[0009] The main water channel comprises a main water inlet end and a main water outlet end respectively located at two ends, the main water inlet end is connected to the water inlet pipe, and the main water outlet end is connected to the water outlet pipe;
[0010] The secondary water channel cover plate is arranged below the capacitor potting groove, and the secondary water channel cover plate includes a cover plate body and a water inlet protruding downwardly perpendicular to the cover plate body, the water inlet is connected with the water inlet pipe, the cover plate body covers the limiting bottom plate in the vertical direction and is spaced from the limiting bottom plate, so that a secondary water channel is formed between the cover plate body and the capacitor potting groove, one end of the secondary water channel is connected with the water inlet pipe, and the other end of the secondary water channel is connected with the water outlet pipe.
[0011] Preferably, the inner diameter of the main water channel is larger than the inner diameter of the secondary water channel.
[0012] Preferably, the top surface of the cover plate body is provided with a plurality of drainage strips protruding upwards, and the plurality of drainage strips are parallel and distributed along the axial direction of the secondary water channel.
[0013] Preferably, the bottom surface of the main water channel cover plate is provided with a downwardly protruding cover block, the size of the cover block is equal to the size of the capacitor potting groove, so that the cover block extends vertically downward into the capacitor potting groove to fit with the top surface of the capacitor module.
[0014] Preferably, a plurality of heat dissipation columns protruding downward are provided at the bottom of the power module, and the plurality of heat dissipation columns extend vertically downward into the main water channel.
[0015] Preferably, the inner diameter of the water inlet pipe gradually decreases along the water inlet toward the main water channel.
[0016] Preferably, the inner diameter of the water outlet pipe gradually increases along the main water channel toward the outside of the shell.
[0017] Preferably, the water inlet pipe is arranged corresponding to the height direction of the capacitor module, and the water outlet pipe is arranged corresponding to the length direction of the capacitor module.
[0018] Preferably, a plurality of DC terminals are provided on one side of the power module, and a capacitor copper busbar is provided on a side of the capacitor module close to the plurality of DC terminals, the capacitor copper busbar being bent along the side of the capacitor module toward the top surface of the main water channel cover plate, and the capacitor copper busbar is connected to the plurality of DC terminals by laser welding.
[0019] Compared with the prior art, the above technical solution has the following beneficial effects: heat is dissipated simultaneously on the top and bottom surfaces of the capacitor module, thereby enhancing the heat dissipation efficiency of the capacitor module, thereby reducing the capacitance and volume of the capacitor module and reducing the material cost of the capacitor module. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the assembly of a motor controller described in the utility model;
[0021] Figure 2It is a cross-sectional schematic diagram of a motor controller described in the utility model;
[0022] Figure 3 This is a structural schematic diagram of a motor controller described in the utility model;
[0023] Figure 4 This is a structural schematic diagram of a secondary waterway cover plate described in the utility model;
[0024] Figure 5 This is a schematic diagram of the top surface structure of a main waterway cover plate described in the utility model;
[0025] Figure 6 This is a schematic diagram of the bottom structure of a main waterway cover plate described in the utility model;
[0026] Figure 7 It is a perspective schematic diagram of a motor controller described in the utility model.
[0027] Figure numerals: 1-shell; 11-capacitor potting groove; 111-limiting side wall; 112-limiting bottom plate; 12-water inlet pipe; 13-water outlet pipe; 2-capacitor module; 3-power module; 31-heat sink; 4-main water channel cover plate; 41-main water channel; 411-main water inlet end; 412-main water outlet end; 42-cover block; 51-cover plate body; 52-water inlet; 53-secondary water channel; 54-drainage strip. DETAILED DESCRIPTION
[0028] The advantages of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.
[0029] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0030] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0031] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".
[0032] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0033] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.
[0034] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and they themselves have no specific meaning. Therefore, "module" and "component" can be used interchangeably.
[0035] like Figures 1 to 7 As shown, the utility model discloses a motor controller with double-sided capacitor heat dissipation, including a housing 1, a capacitor module 2, a power module 3, a main water channel cover plate 4 and a secondary water channel cover plate 5.
[0036] A capacitor potting groove 11 is defined in the housing 1 , and the capacitor potting groove 11 includes a limiting side wall 111 and a limiting bottom plate 112 . The capacitor module 2 is disposed in the capacitor potting groove 11 , and the bottom surface of the capacitor module 2 is in contact with the limiting bottom plate 112 .
[0037] The main water channel cover plate 4 is arranged above the capacitor module 2, and the top surface of the main water channel cover plate 4 is recessed to set the main water channel 41, and the main water channel 41 covers the capacitor module 2 in the vertical direction. The power module 3 is arranged above the main water channel cover plate 4, and the power module 3 covers the main water channel 41 in the vertical direction.
[0038] The housing 1 is provided with a water inlet pipe 12 and a water outlet pipe 13 which are respectively connected to the outside of the housing. The water inlet pipe 12 and the water outlet pipe 13 are respectively arranged outside two ends of the capacitor potting groove 11 .
[0039] The main water channel 41 includes a main water inlet end 411 and a main water outlet end 412 respectively located at two ends. The main water inlet end 411 is connected to the water inlet pipe 12, and the main water outlet end 412 is connected to the water outlet pipe 13.
[0040] The secondary water channel cover plate is arranged below the capacitor potting groove 11, and the secondary water channel cover plate includes a cover plate body 51 and a water inlet 52 protruding downwardly perpendicular to the cover plate body 51, and the water inlet 52 is connected to the water inlet pipe 12. The cover plate body 51 covers the limiting bottom plate 112 in the vertical direction and is spaced apart from the limiting bottom plate 112, so that a secondary water channel 53 is formed between the cover plate body 51 and the capacitor potting groove 11, and one end of the secondary water channel 53 is connected to the water inlet pipe 12, and the other end of the secondary water channel 53 is connected to the water outlet pipe 13.
[0041] Specifically, a sunken capacitor potting groove 11 is provided in the housing 1, and the capacitor potting groove 11 is composed of a connected limiting side wall 111 and a limiting bottom plate 112, and the limiting side wall 111 circumferentially surrounds the limiting bottom plate 112. When the capacitor module 2 is placed in the capacitor potting groove 11, the bottom surface of the capacitor module 2 fits with the limiting bottom plate 112, that is, the bottom surface of the capacitor module 2 is in direct contact with the limiting bottom plate 112. It can be understood that in the motor controller of the present utility model, after the capacitor module 2 is placed in the capacitor potting groove 11 so that the bottom surface of the capacitor module 2 fits with the limiting bottom plate 112, the capacitor module 2 is potted from the direction of the top surface of the capacitor module, and then the main waterway cover plate 4 is covered above the capacitor module 2, which is equivalent to using the main waterway cover plate 4 as a cover plate for potting the capacitor module 2. The above-mentioned setting can reduce the barrier between the capacitor module 2 and the secondary waterway 53 and improve the double-sided heat dissipation efficiency.
[0042] The main water channel cover plate 4 can be set to be approximately rectangular parallelepiped, and the top surface of the main water channel cover plate 4 is sunken to form a main water channel 41. The main water channel 41 is arranged in the same direction along the length direction and width direction of the main water channel cover plate 4, and the length and width of the main water channel 41 are slightly smaller than the length and width of the main water channel cover plate 4. The power module 3, the main water channel cover plate 4 and the capacitor module 2 are stacked in sequence from top to bottom in the vertical direction to form a longitudinally laminated structure. The main water channel 41 can dissipate heat from the bottom surface of the power module 3 and the top surface of the capacitor module 2 at the same time.
[0043] The shell 1 also includes a water inlet pipe 12 and a water outlet pipe 13 respectively connected to the outside of the shell 1. The water inlet pipe 12 is used for external liquid inlet equipment, and the water outlet pipe 13 is used for external liquid outlet equipment. The main water channel 41 includes a main water inlet end 411 and a main water outlet end 412 located at both ends. The main water inlet end 411 is connected to the water inlet pipe 12, and the main water outlet end 412 is connected to the water outlet pipe 13, so that the water inlet pipe 12, the main water channel 41 and the water outlet pipe 13 are connected, so that the cooling liquid can enter the main water inlet end 41 through the water inlet pipe 12, flow through the main water outlet end 412, enter the water outlet pipe 13 and flow out of the motor controller, and the heat of the power module 3 and the capacitor module 2 is transferred to the cooling liquid, thereby completing the heat dissipation of the bottom surface of the power module 3 and the top surface of the capacitor module 2.
[0044] Furthermore, a secondary water channel cover plate 4 is arranged below the capacitor potting groove 11, and the cover plate body 51 of the secondary water channel cover plate is spaced from the limiting bottom plate 112, that is, there is a gap between the cover plate body 51 and the capacitor potting groove 11, forming a secondary water channel 53, one end of the secondary water channel 53 is connected to the water inlet pipe 12, and the other end is connected to the water outlet pipe 13. In addition, the water inlet 52 of the secondary water channel cover plate is arranged below the water inlet pipe 12 and is connected to the water inlet pipe 12. Therefore, the water inlet pipe 12 and the water outlet pipe 13 will be connected to the main water channel 41 and the secondary water channel 53 at the same time. After the cooling liquid can flow into the water inlet pipe 12 through the water inlet 52, in addition to flowing into the main water channel 41, it will also flow into the secondary water channel 53, and then the cooling liquid in the secondary water channel 53 will flow out of the motor controller through the water outlet pipe 13, thereby completing the heat dissipation of the bottom surface of the capacitor module 2.
[0045] After the above arrangement, the top and bottom surfaces of the capacitor module 2 can be cooled simultaneously, thereby enhancing the cooling efficiency of the capacitor module, thereby reducing the capacitance and volume of the capacitor module and reducing material costs.
[0046] In an optional embodiment, if Figure 2 As shown, the inner diameter of the main water channel 41 is greater than the inner diameter of the secondary water channel 53. It can be understood that the main water channel 41 is used to simultaneously realize the heat dissipation function of the power module 3 and the capacitor module 2, and has a large demand for cooling liquid. Through the above arrangement, most of the cooling liquid is preferentially passed through the main water channel 41, thereby improving the heat dissipation efficiency of the main water channel 41.
[0047] In an optional embodiment, if Figure 7 As shown, the top surface of the cover plate body 51 is provided with a plurality of upwardly protruding drainage strips 54, and the plurality of drainage strips 54 are parallel and distributed along the axial direction of the secondary water channel 53. It can be understood that by providing a plurality of drainage strips 54, a structure of a plurality of water channels distributed along the axial direction of the secondary water channel 53 is formed, and the cooling liquid in the secondary water channel 53 is further guided to flow in the direction of the water inlet pipe 12 to the water outlet pipe 13.
[0048] In an optional embodiment, if Figure 6 As shown, the bottom surface of the main waterway cover plate 4 is provided with a downwardly protruding cover block 42, and the size of the cover block 42 is equal to the size of the capacitor potting groove 11, so that the cover block 42 extends vertically downward into the capacitor potting groove 11 to fit with the top surface of the capacitor module 2. Specifically, since the main waterway cover plate 4 is used as a cover plate for potting the capacitor module 2, a cover block extending into the capacitor potting groove 11 and fitting with the top surface of the capacitor module 2 is provided on the bottom surface of the main waterway cover plate 4, further improving the sealing effect of the capacitor module 22 when the main waterway cover plate 4 covers the capacitor potting groove 11, preventing the capacitor module from being displaced in the capacitor potting groove 11, and improving the stability of the motor controller when in use.
[0049] In an optional embodiment, if Figure 2 As shown, the bottom of the power module 3 is provided with a plurality of heat dissipation columns 31 protruding downward, and the plurality of heat dissipation columns 31 extend vertically downward into the main water channel 41. Specifically, the plurality of heat dissipation columns 31 may be evenly distributed or unevenly distributed, and the heat dissipation columns 31 extend into the main water channel 41, further transferring the heat of the power module 3 to the cooling liquid in the main water channel 41, thereby improving the heat dissipation effect of the power module 3.
[0050] In an optional embodiment, if Figure 2 As shown, the inner diameter of the water inlet pipe 12 gradually decreases along the water inlet 52 toward the main water channel 41. It can be understood that, through the above arrangement, the water pressure gradually increases during the cooling liquid enters the main water channel 41 along the water inlet pipe 12, and the cooling liquid can quickly flow into the main water channel 41.
[0051] In an optional embodiment, if Figure 2 As shown, the inner diameter of the water outlet pipe 13 gradually increases toward the outer side of the shell along the main water channel 41. It can be understood that, through the above arrangement, the water pressure of the cooling liquid gradually decreases during the process of flowing out of the motor controller along the water outlet pipe 13, and the flow rate out of the motor controller is low, so that the cooling liquid can be kept in the main water channel 41 for a longer time, thereby achieving a better heat dissipation effect.
[0052] In an optional embodiment, if Figure 2 As shown, the water inlet pipe is arranged in the height direction of the capacitor module, and the water outlet pipe is arranged in the length direction of the capacitor module. It can be understood that, through the above arrangement, the bends of the cooling liquid flow path are increased, and the flow rate of the cooling liquid out of the motor controller is further reduced, so that the cooling liquid is kept in the main water channel 41 for a longer time, achieving a better heat dissipation effect.
[0053] In an optional embodiment, if Figure 1 As shown, a plurality of DC terminals are provided on one side of the power module 3, and a capacitor copper bar bent along the side of the capacitor module 2 toward the top surface of the main waterway cover plate 4 is provided on the side of the capacitor module 2 close to the plurality of DC terminals, and the capacitor copper bar is connected to the plurality of DC terminals by laser welding. It can be understood that the capacitor copper bar bent toward the top surface of the main waterway cover plate 4 can be directly attached to the DC terminal and connected by laser welding. The laser welding connection method forms a covalent bond between the materials, which is more reliable and has no contact resistance, and increases the longitudinal stacking of the capacitor copper bar and the DC terminal, which can reduce the stray inductance of the motor controller.
[0054] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: heat is dissipated simultaneously on the top and bottom surfaces of the capacitor module, thereby enhancing the heat dissipation efficiency of the capacitor module, thereby reducing the capacitance and volume of the capacitor module and reducing the material cost of the capacitor module.
[0055] It should be noted that the embodiments of the present invention have better practicability and do not impose any form of limitation on the present invention. Any technician familiar with the field may use the technical content disclosed above to change or modify it into an equivalent effective embodiment. However, any modification or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A motor controller with double-sided capacitor heat dissipation, characterized in that: It includes a shell, a capacitor module, a power module, a main water channel cover plate and a secondary water channel cover plate. A capacitor potting groove is provided in the housing, the capacitor potting groove comprises a limiting side wall and a limiting bottom plate, the capacitor module is arranged in the capacitor potting groove, and the bottom surface of the capacitor module is in contact with the limiting bottom plate; The main water channel cover plate is arranged above the capacitor module, the top surface of the main water channel cover plate is recessed to arrange the main water channel, and the main water channel covers the capacitor module in the vertical direction; the power module is arranged above the main water channel cover plate, and the power module covers the main water channel in the vertical direction; A water inlet pipe and a water outlet pipe respectively connected to the outside of the shell are provided in the shell, and the water inlet pipe and the water outlet pipe are respectively arranged outside the two ends of the capacitor potting groove; The main water channel comprises a main water inlet end and a main water outlet end respectively located at two ends, the main water inlet end is connected to the water inlet pipe, and the main water outlet end is connected to the water outlet pipe; The secondary water channel cover plate is arranged below the capacitor potting groove, and the secondary water channel cover plate includes a cover plate body and a water inlet protruding downwardly perpendicular to the cover plate body, the water inlet is connected with the water inlet pipe, the cover plate body covers the limiting bottom plate in the vertical direction and is spaced from the limiting bottom plate, so that a secondary water channel is formed between the cover plate body and the capacitor potting groove, one end of the secondary water channel is connected with the water inlet pipe, and the other end of the secondary water channel is connected with the water outlet pipe.
2. The motor controller according to claim 1, characterized in that: The inner diameter of the main water channel is greater than the inner diameter of the secondary water channel.
3. The motor controller according to claim 1, characterized in that: The top surface of the cover plate body is provided with a plurality of drainage strips protruding upwards, and the plurality of drainage strips are parallel and distributed along the axial direction of the secondary water channel.
4. The motor controller according to claim 1, characterized in that: The bottom surface of the main water channel cover plate is provided with a downwardly protruding cover block, the size of which is equal to the size of the capacitor potting groove, so that the cover block extends vertically downward into the capacitor potting groove to fit with the top surface of the capacitor module.
5. The motor controller according to claim 1, characterized in that: A plurality of heat dissipation columns protruding downward are arranged at the bottom of the power module, and the plurality of heat dissipation columns extend vertically downward into the main water channel.
6. The motor controller according to claim 1, characterized in that: The inner diameter of the water inlet pipe gradually decreases along the water inlet toward the main water channel.
7. The motor controller according to claim 1, characterized in that: The inner diameter of the water outlet pipe gradually increases along the main water channel toward the outside of the shell.
8. The motor controller according to claim 1, characterized in that: The water inlet pipe is arranged corresponding to the height direction of the capacitor module, and the water outlet pipe is arranged corresponding to the length direction of the capacitor module.
9. The motor controller according to claim 1, characterized in that: A plurality of DC terminals are arranged on one side of the power module, and a capacitor copper busbar is arranged on one side of the capacitor module close to the plurality of DC terminals and is bent along the side of the capacitor module toward the top surface of the main water channel cover plate, and the capacitor copper busbar is connected to the plurality of DC terminals by laser welding.