Controller heat dissipation device, motor controller, driving motor and vehicle

Abstract

The utility model relates to a controller heat dissipation device, a motor controller, a driving motor and a vehicle, and the controller heat dissipation device comprises a housing which is provided with an accommodation cavity; the cover plate detachably covers the accommodating cavity, a first fastening piece is arranged on the cover plate, and the first fastening piece is used for connecting the shell and the cover plate, so that a main flow channel for circulating cooling liquid is formed between the shell and the cover plate; the heating element is arranged on the side, away from the containing cavity, of the cover plate, and the orthographic projection of the cover plate on the shell completely covers the orthographic projection of the heating element on the shell. The friction stir welding process and the subsequent burr removing process are omitted, and the machining cost is reduced; meanwhile, if the configuration of the IGBT module needs to be changed or upgraded subsequently, only the cover plate needs to be redesigned, so that new requirements can be met, the mold of the shell does not need to be changed, and the cost caused by change and maintenance is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation devices, and in particular to a controller heat dissipation device, a motor controller, a drive motor and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, controllers are also replaced rapidly. Today, new energy vehicle controllers are developing in the direction of high power density, high integration, and high capacity matching. As a key component in the drive system, the IGBT module in the electric vehicle controller has a direct impact on the output performance of the motor and the reliability of the motor drive system. The frequent start-up and shutdown of the motor will cause the IGBT module to generate a lot of heat. If the heat cannot be transferred out in time, the IGBT will be broken down and the controller will be burned, which will seriously affect the quality and reliability of the controller. At present, the cooling methods of commonly used motor controllers are divided into water cooling and natural air cooling. The heat dissipation effect of air cooling is much lower than that of water cooling, especially for high-power drive motor controllers.

[0003] Therefore, the existing controller heat dissipation device mainly adopts water cooling. The controller heat dissipation device includes a heat dissipation shell and a cover plate. The front of the heat dissipation shell is installed with heating elements such as IGBT modules, relays, and DCDC power modules. The back of the heat dissipation shell is provided with heat dissipation fins. The cover plate is covered on the back of the heat dissipation shell to form a complete flow channel between the cover plate and the heat dissipation shell. Coolant flows in the flow channel. The heat generated by the IGBT module is transferred to the contact part of the heat dissipation shell and the IGBT module through heat conduction, and then carried away by the coolant circulation. At present, the cover plate and the heat dissipation shell are generally sealed by stir friction welding. However, after processing, a large number of burrs will be generated on the welding surface between the cover plate and the heat dissipation shell. The welding surface needs to be fine-machined to remove the burrs, which increases the process and leads to higher processing costs. Utility Model Content

[0004] The present application provides a controller heat dissipation device, a motor controller, a drive motor and a vehicle to solve the technical problem that the existing controller heat dissipation device uses stir friction welding to seal the cover plate and the heat dissipation shell, a large number of burrs will be generated on the welding surface, and the welding surface needs to be fine-machined to remove the burrs, which increases the process and leads to high processing costs.

[0005] In a first aspect, the present application provides a controller heat dissipation device, comprising: a shell body, provided with a accommodating cavity; a cover plate, detachably covered on the accommodating cavity, the cover plate being provided with a first fastener, the first fastener being used to connect the shell body and the cover plate so as to form a main channel for circulating cooling liquid between the shell body and the cover plate; and a heating element, arranged on a side of the cover plate away from the accommodating cavity, the orthographic projection of the cover plate on the shell body completely covering the orthographic projection of the heating element on the shell body.

[0006] In a possible implementation, a water inlet and a water outlet are provided on the housing, and both the water inlet and the water outlet are communicated with the main flow channel.

[0007] In a possible implementation, heat dissipation fins are provided on one side of the cover plate facing the accommodating cavity.

[0008] In a possible implementation, a plurality of heat dissipation fins are provided, and a branch flow channel is formed between any two adjacent heat dissipation fins, and the branch flow channel is communicated with the main flow channel.

[0009] In a possible implementation, the first end of the heat dissipation fin is connected to the cover plate, and the second end of the heat dissipation fin extends towards the accommodating cavity in the first direction.

[0010] In a possible implementation, a first accommodating groove is provided on the housing, a sealing member is embedded in the first accommodating groove, and the sealing member is arranged around the accommodating cavity.

[0011] In a possible implementation, a second accommodating groove is provided on the housing, the second accommodating groove is in an interference fit connection with the edge of the cover plate, and the second accommodating groove is arranged around the first accommodating groove.

[0012] In a possible implementation, the housing has a first plane. When the cover plate is fitted in the second accommodating groove, the side of the cover plate facing away from the accommodating cavity is flush with the first plane of the housing; the maximum distance between the first accommodating groove and the first plane is greater than the maximum distance between the second accommodating groove and the first plane.

[0013] In a possible implementation, a plurality of through holes are provided on the edge of the cover plate, a plurality of first mounting holes corresponding to the through holes one by one are provided on the second accommodating groove of the housing, and one end of the first fastener is connected to the first mounting hole after passing through the through hole.

[0014] In a possible implementation, a heat dissipation boss is provided on one side of the cover plate facing the accommodating cavity, a second mounting hole is provided on the side of the heat dissipation boss facing away from the accommodating cavity, a second fastener is provided on the second mounting hole, and the heating element is connected to the heat dissipation boss through the second fastener.

[0015] In a second aspect, the present application provides a motor controller, including the controller heat dissipation device as described above.

[0016] In a third aspect, the present application provides a driving motor, including the motor controller as described above.

[0017] In a fourth aspect, the present application provides a vehicle, including the driving motor as described above.

[0018] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0019] A controller heat dissipation device, a motor controller, a drive motor, and a vehicle provided by an embodiment of the present application fix a cover plate to one side of a housing having a receiving cavity by tightening a first fastener. A main flow channel is formed between the housing and the cover plate, and a coolant flows through the main flow channel. The heat generated by a heating element is transferred to the part of the cover plate in contact with the heating element through heat conduction, and then taken away by the circulating coolant, so as to achieve efficient heat dissipation of the heating element, transfer the heat out in time, avoid burning out the controller, and ensure the quality and reliability of the controller. Compared with the prior art, the processes of friction stir welding and subsequent burr removal are reduced, greatly reducing the processing cost; at the same time, if the configuration of the IGBT module needs to be changed or upgraded subsequently, only the cover plate needs to be redesigned to match the new requirements, and the mold of the housing does not need to be changed, reducing the cost of change and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application and used together with the specification to explain the principles of the present application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] One or more embodiments are exemplarily illustrated by the pictures in the corresponding accompanying drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the figures do not constitute a proportional limitation.

[0023] Figure 1 It is an exploded front view structure diagram of an existing controller heat dissipation device;

[0024] Figure 2 It is a rear view structure diagram of an existing controller heat dissipation device;

[0025] Figure 3 It is a structure diagram of a controller heat dissipation device provided by an embodiment of the present application;

[0026] Figure 4 For Figure 3 An exploded partial structure diagram of the shown controller heat dissipation device, where the heating element is not shown;

[0027] Figure 5 For Figure 3 A rear view of the cover plate of the shown controller heat dissipation device;

[0028] Figure 6 is Figure 4 an enlarged schematic view of part A in

[0029] Figure 7 is Figure 3 the front view of the cover plate of the controller heat dissipation device shown in

[0030] Figure 8 is Figure 7 a cross-sectional view taken along the B-B direction in

[0031] Description of reference numerals:

[0032] 1. Housing; 11. Accommodation cavity; 12. Water inlet; 13. Water outlet; 14. First accommodation groove; 15. Second accommodation groove; 16. First plane; 17. First mounting hole; 2. Cover plate; 21. Heat dissipation fins; 22. Main flow channel; 23. Branch flow channel; 24. Through hole; 25. Heat dissipation boss; 26. Second mounting hole; 3. Heating element; 4. Sealing element;

[0033] 100. Heat dissipation housing; 101. Heat dissipation fins; 200. Cover plate; 300. IGBT module; 400. Relay; 500. DCDC power module. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0035] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0036] For ease of description, spatial relative relationship terms may be used in the text to describe the relative position relationship or movement of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "upper", "front", "rear", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation other than the orientations depicted in the figure. For example, if the device in the figure undergoes a position flip, attitude change, or motion state change, then these directional indications will change accordingly. For example, an element described as "below other elements or features" or "beneath other elements or features" will subsequently be oriented as "above other elements or features" or "upper than other elements or features". Therefore, the example term "below" can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0037] Currently, the existing controller cooling devices mainly adopt the water-cooling method, and their structures are as Figure 1 and Figure 2 shown. The existing controller cooling device includes a heat dissipation housing 100 and a cover plate 200. IGBT modules 300, relays 400, DCDC power modules 500 and other heat-generating components are installed on the front of the heat dissipation housing 100. Heat dissipation fins 101 are provided on the back of the heat dissipation housing 100. The cover plate 200 is covered on the back of the heat dissipation housing 100 so as to form a complete flow channel between the cover plate 200 and the heat dissipation housing 100, and a coolant flows in the flow channel. The heat generated by the IGBT module 300 is transferred to the contact part between the heat dissipation housing 100 and the IGBT module 300 through heat conduction, and then taken away by the circulation of the coolant. Generally, the cover plate 200 is fixed to the back of the heat dissipation housing 100 by friction stir welding. Friction stir welding is a method of placing a high-temperature and rapidly rotating tool head at the joint of two objects, softening and mixing the die-cast aluminum at the joint of two objects with the same material. After cooling, the two objects can be joined. Since a lot of burrs will be carried out by the rotation of the tool head, after processing, a large number of burrs will be generated on the welding surface between the cover plate 200 and the heat dissipation housing 100, and the welding surface needs to be finely processed to remove the burrs, which increases the process and results in a relatively high processing cost.

[0038] In order to solve the technical problem that the existing controller heat dissipation device uses stir friction welding to seal the cover plate and the heat dissipation shell, a large number of burrs will be generated on the welding surface, and the welding surface needs to be fine-machined to remove the burrs, which increases the process and leads to high processing costs, the present application provides a controller heat dissipation device, a motor controller, a drive motor and a vehicle, which can achieve efficient heat dissipation, reduce stir friction welding and subsequent burr removal processes, and greatly reduce processing costs; at the same time, if the configuration of the IGBT module needs to be changed or upgraded in the future, it is only necessary to redesign the cover plate to match the new requirements, without changing the mold of the shell, reducing the cost of changes and maintenance.

[0039] Figure 3 and Figure 4 A controller heat dissipation device provided in an embodiment of the present application includes a housing 1, a cover plate 2 and a heating element 3. The housing 1 is provided with a receiving cavity 11; the cover plate 2 is detachably covered on the receiving cavity 11, and a first fastener is provided around the cover plate 2. The first fastener is used to connect the housing 1 and the cover plate 2 so that a main channel 22 ( Figure 5 The heating element 3 is arranged on the side of the cover plate 2 away from the accommodating cavity 11, and the orthographic projection of the cover plate 2 on the housing 1 completely covers the orthographic projection of the heating element 3 on the housing 1.

[0040] It should be noted that the heating element 3 can be a component with high heat generation and high heat dissipation requirements such as an IGBT module, and the first fastener can be a screw in the prior art to achieve a detachable connection between the housing 1 and the cover plate 2. It can be understood that by tightening the first fastener, the cover plate 2 is fixedly connected to the side of the housing 1 having the accommodating cavity 11, and a main channel 22 is formed between the housing 1 and the cover plate 2. Coolant flows in the main channel 22. The heat generated by the heating element 3 is transferred to the contact part of the cover plate 2 and the heating element 3 through heat conduction, and then taken away by the coolant circulation, thereby achieving efficient heat dissipation of the heating element 3, transferring the heat in time, avoiding the controller from being burned, and ensuring the quality and reliability of the controller. Compared with the prior art, the friction stir welding and subsequent burr removal processes are reduced, greatly reducing the processing cost; at the same time, if the configuration of the IGBT module needs to be changed or upgraded later, only the cover plate 2 needs to be redesigned to match the new requirements, and the mold of the housing 1 does not need to be changed, reducing the cost of changes and maintenance.

[0041] It should be emphasized that for the same controller, multiple different models of the IGBT module can be set at the same time (such as the oil pump IGBT module and the air pump IGBT module). At this time, multiple IGBT modules are installed on the side of the cover plate 2 facing away from the accommodation cavity 11; alternatively, the number of the IGBT modules may be multiple arranged in series. At this time, the corresponding controller heat dissipation device can be designed with multiple sets accordingly. The multiple sets of the controller heat dissipation devices are respectively connected to the multiple IGBT modules in one-to-one correspondence.

[0042] Furthermore, as Figure 3 shown, a water inlet 12 and a water outlet 13 are provided on the housing 1. The water inlet 12 and the water outlet 13 are both communicated with the main flow channel 22. A water pump can be connected between the water inlet 12 and the water outlet 13. The coolant is driven by the water pump to circulate in the main flow channel 22. After the low-temperature coolant enters the main flow channel 22 from the water inlet 12, it flows out through the water outlet 13 to take away the heat generated by the IGBT module due to frequent startup and shutdown.

[0043] In some embodiments, as Figure 5 shown, heat dissipation fins 21 are provided on the side of the cover plate 2 facing the accommodation cavity 11. The heat generated by the IGBT module is transferred to the heat dissipation fins 21 through the housing 1. The heat dissipation fins 21 increase the heat dissipation area. After the coolant contacts the housing 1 and the heat dissipation fins 21, the heat is taken away, thereby improving the heat dissipation efficiency and further ensuring the working reliability of the controller.

[0044] Furthermore, a plurality of heat dissipation fins 21 are provided. A branch flow channel 23 is formed between any two adjacent heat dissipation fins 21. The branch flow channel 23 is communicated with the main flow channel 22. By providing a plurality of heat dissipation fins 21, the coolant circulates in the main flow channel 22 and the branch flow channel 23 to improve the heat dissipation efficiency.

[0045] It should be noted that both ends of the heat dissipation fins 21 are not connected to the edge of the cover plate 2, that is, to ensure that the main flow channel 22 is in a communicating state with any branch flow channel 23.

[0046] It can be understood that the specific structure of the foregoing heat dissipation fins 21 can be optimized based on the rectangular heat dissipation fins 21 already existing in the prior art. Of course, it can also be designed separately according to the specific heat dissipation requirements. For example, it can be designed into a structure with a smaller width at both ends and a larger width in the middle. On the one hand, this structure can significantly reduce the flow resistance of the coolant generated by the branch flow channel 23 and reduce the selection cost of the corresponding water pump. On the other hand, compared with the rectangular heat dissipation fins 21, the overall volume of the cover plate 2 can be designed smaller under the premise of meeting the same heat dissipation amount, and the material cost of the cover plate 2 and the heat dissipation fins 21 can be reduced.

[0047] It should be noted that there are many capacities and models of IGBT modules, and the flow rate of the water inlet 12, the dimensions of the main flow channel 22 and the branch flow channels 23 change correspondingly; subsequently, on the basis of determining the flow rate, the dimensions of the main flow channel 22 and the branch flow channels 23, the number of each heat dissipation fin 21 can be determined through simulation and experiment, and the present application does not make special limitations.

[0048] In some embodiments, the first end of the heat dissipation fin 21 is connected to the cover plate 2, and the second end of the heat dissipation fin 21 extends towards the accommodation cavity 11 in the first direction and abuts against the housing 1. For the convenience of understanding and description, the first direction can be the X direction shown in the figure. Since other heating elements 3, such as relays, DCDC power modules, etc., are also provided on the side of the housing 1 away from the cover plate 2, the heat generation of relays, DCDC power modules, etc. is relatively small compared to the IGBT module, and their heat generation can also be transferred to the housing 1 and then taken away by the coolant. The second end of the heat dissipation fin 21 extends towards the accommodation cavity 11 in the first direction and abuts against the housing 1, which can also increase the contact area between elements such as relays and DCDC power modules and the coolant, thereby improving the heat dissipation efficiency.

[0049] Optionally, the cover plate 2 has a first thickness in the first direction, and the heat dissipation fin 21 has a first height in the first direction. The first thickness can be set to 3 mm, and the first height can be set to 10 mm.

[0050] In some embodiments, as Figure 6 shown, a first accommodation groove 14 is provided on the housing 1, and a seal 4 is embedded in the first accommodation groove 14. The seal 4 is arranged around the accommodation cavity 11. The seal 4 can adopt a rubber or engineering plastic sealing ring in the prior art. By providing the seal 4, the sealing performance between the cover plate 2 and the housing 1 can be ensured, and the coolant can be prevented from overflowing from the gap between the cover plate 2 and the housing 1.

[0051] Furthermore, a second accommodation groove 15 is provided on the housing 1, and the second accommodation groove 15 is in an interference fit connection with the edge of the cover plate 2. The second accommodation groove 15 is arranged around the first accommodation groove 14. Specifically, a certain distance should be designed between the second accommodation groove 15 and the first accommodation groove 14 so that after the cover plate 2 is fitted into the second accommodation groove 15, the cover plate 2 can be stably connected to the housing 1.

[0052] Furthermore, as Figure 4 and Figure 6As shown, the housing 1 has a first plane 16. When the cover plate 2 is fitted into the second accommodation groove 15, the side of the cover plate 2 facing away from the accommodation cavity 11 is flush with the first plane 16 of the housing 1, so as to improve the installation flatness of the cover plate 2. The maximum distance between the first accommodation groove 14 and the first plane 16 is greater than the maximum distance between the second accommodation groove 15 and the first plane 16. After the seal 4 is embedded in the first accommodation groove 14, the elasticity of the seal 4 itself is utilized to improve the sealing performance between the cover plate 2 and the housing 1.

[0053] In some embodiments, as Figure 7 shown, a plurality of through holes 24 are provided at the edge of the cover plate 2, and a plurality of first mounting holes 17 corresponding to the through holes 24 one by one are provided on the second accommodation groove 15 of the housing 1. One end of the first fastener passes through the through hole 24 and is connected to the first mounting hole 17. By providing the first fastener, the detachable connection between the cover plate 2 and the housing 1 can be realized, the installation convenience is improved, and the processing cost is reduced at the same time. Specifically, the plurality of through holes 24 can be equidistantly arranged at the edge of the cover plate 2 to improve the installation stability and prevent the cover plate 2 from deforming due to uneven force.

[0054] In some embodiments, as Figure 7 and Figure 8 shown, a heat dissipation boss 25 is provided on the side of the cover plate 2 facing the accommodation cavity 11, a second mounting hole 26 is provided on the side of the heat dissipation boss 25 facing away from the accommodation cavity 11, and a second fastener is provided on the second mounting hole 26. The heating element 3 is connected to the heat dissipation boss 25 through the second fastener. The second fastener can be a screw or the like in the prior art. By providing the heat dissipation boss 25, on the one hand, it is convenient for the installation of the heating element 3, and on the other hand, the heat dissipation area is increased. The heat generated by the heating element 3 is transferred to the heat dissipation boss 25 through the second fastener, and the coolant circulates to take away the heat.

[0055] The embodiment of the present application also provides a motor controller, including the controller heat dissipation device as described above.

[0056] This motor controller is a motor controller for a vehicle, and controls the forward, backward, acceleration, etc. of the vehicle by controlling the driving motor.

[0057] The embodiment of the present application also provides a driving motor, including the motor controller as described above.

[0058] The embodiment of the present application also provides a vehicle, including the driving motor as described above.

[0059] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0060] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0061] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A controller heat dissipation device, characterized in that: include: The housing (1) is provided with a receiving cavity (11); a cover plate (2) detachably covering the accommodating cavity (11), the cover plate (2) being provided with a first fastener, the first fastener being used to connect the shell (1) and the cover plate (2) so that a main channel (22) for circulating cooling liquid is formed between the shell (1) and the cover plate (2); and The heating element (3) is arranged on a side of the cover plate (2) facing away from the accommodating cavity (11), and the orthographic projection of the cover plate (2) on the shell (1) completely covers the orthographic projection of the heating element (3) on the shell (1).

2. The controller heat dissipation device according to claim 1, characterized in that: The shell (1) is provided with a water inlet (12) and a water outlet (13), and both the water inlet (12) and the water outlet (13) are in communication with the main flow channel (22).

3. The controller heat dissipation device according to claim 1 or 2, characterized in that: A heat dissipation fin (21) is provided on one side of the cover plate (2) facing the accommodating cavity (11).

4. The controller heat dissipation device according to claim 3, characterized in that: A plurality of the heat dissipation fins (21) are provided, and a branch channel (23) is formed between any two adjacent heat dissipation fins (21), and the branch channel (23) is connected to the main channel (22).

5. The controller heat dissipation device according to claim 3, characterized in that: A first end of the heat dissipation fin (21) is connected to the cover plate (2), and a second end of the heat dissipation fin (21) extends in a first direction toward the accommodating cavity (11).

6. The controller heat dissipation device according to claim 1, characterized in that: The housing (1) is provided with a first accommodating groove (14), a sealing member (4) is embedded in the first accommodating groove (14), and the sealing member (4) is arranged around the accommodating cavity (11).

7. The controller heat dissipation device according to claim 6, characterized in that: The housing (1) is provided with a second accommodating groove (15), the second accommodating groove (15) is engaged and connected with the edge of the cover plate (2), and the second accommodating groove (15) is arranged around the first accommodating groove (14).

8. The controller heat dissipation device according to claim 7, characterized in that: The housing (1) has a first plane (16), and when the cover plate (2) is engaged with the second accommodating groove (15), a side of the cover plate (2) facing away from the accommodating cavity (11) is flush with the first plane (16) of the housing (1); The maximum distance between the first accommodating groove (14) and the first plane (16) is greater than the maximum distance between the second accommodating groove (15) and the first plane (16).

9. The controller heat dissipation device according to claim 7, characterized in that: The edge of the cover plate (2) is provided with a plurality of through holes (24), the second receiving groove (15) of the shell (1) is provided with a plurality of first mounting holes (17) corresponding one-to-one to the through holes (24), and one end of the first fastener passes through the through hole (24) and is connected to the first mounting hole (17).

10. The controller heat dissipation device according to claim 1, characterized in that: A heat dissipation boss (25) is provided on a side of the cover plate (2) facing the accommodating cavity (11), a second mounting hole (26) is provided on a side of the heat dissipation boss (25) facing away from the accommodating cavity (11), a second fastener is provided on the second mounting hole (26), and the heating element (3) is connected to the heat dissipation boss (25) via the second fastener.

11. A motor controller, characterized in that: It comprises a controller heat dissipation device as described in any one of claims 1 to 10.

12. A driving motor, characterized in that: Comprising the motor controller of claim 11.

13. A vehicle, characterized in that: Comprising the drive motor as claimed in claim 12.

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