Integrated efficient heat dissipation electric control shell, motor controller and electric drive assembly

Abstract

The invention relates to the technical field of electric automobile motor controllers, in particular to an integrated efficient heat dissipation electric control shell, a motor controller and an electric drive assembly. Comprising a shell, a filtering assembly, a capacitor and a main function module, the shell comprises a first cavity and a second cavity, a partition is arranged between the two cavities, a cooling water tank is formed in the partition, and the two ends of the cooling water tank are connected with a cooling water channel inlet and a cooling water channel outlet respectively; a high-voltage input interface is arranged on the outer wall of the second cavity of the shell in a penetrating mode and connected with an external power supply battery pack. The filtering assembly is located in the second cavity of the shell and connected with the high-voltage input interface. The capacitor is installed in the second cavity of the shell and connected with the filtering assembly. The main function module is installed in the first cavity of the shell. The invention can solve the problems of complex assembly process, high cost, low heat dissipation efficiency, large circuit parasitic inductance and the like in the prior art, and has great popularization value.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle motor controllers, and in particular to an integrated high-efficiency heat dissipation electric control housing, a motor controller and an electric drive assembly. Background Art

[0002] In electric vehicles, the function of the motor controller is to convert the electric energy stored in the power battery into the electric energy required to drive the motor according to the gear position, throttle, brake and other instructions, to control the start-up, forward and backward speed, climbing strength and other driving conditions of the electric vehicle, or to help the electric vehicle brake and store part of the braking energy in the power battery. It is one of the key components of electric vehicles. However, the current motor controller is restricted by the limited space allocated on electric vehicles, and needs to develop in the direction of lightweight, integration and high power density; in addition, in the face of the increasingly fierce price war of electric vehicles, we also need to develop a motor controller with more cost advantages.

[0003] The authorized patent "A multi-functional all-in-one motor controller and vehicle compatible with multiple types of devices" mentions a motor controller, including a power module mechanism and an electronic control module mechanism. The power module mechanism includes a power cover, a power component housing and a power component; the electronic control module mechanism includes an electronic control housing, an electronic control inverter module component, a capacitor housing and a capacitor core. The electronic control housing is detachably connected to the bottom of the power component housing, and the capacitor housing is fixed to the bottom of the electronic control housing; a water inlet is provided on one side of the power component housing, and a water outlet channel is provided on the other side. A first water channel is connected between the water inlet and the water outlet channel, a water inlet channel is provided on the side of the electronic control housing, and a water outlet is provided on the bottom of the electronic control housing. A capacitor thermal pad is attached above the capacitor core, and a second water channel between the water inlet channel and the water outlet passes above the capacitor thermal pad. The capacitor and the electronic control inverter module in the motor controller are fixed together by two shells through multiple bolts, and the assembly process is complicated. The intermediate heat transfer and heat dissipation requires the addition of heat dissipation pads on the back of the power module water channel and the capacitor heat dissipation area, which is costly and has low heat dissipation efficiency. The circuit from the high-voltage input module to the capacitor of the motor controller passes through the entire electronic control module. The circuit transmission path is too long and the parasitic inductance is large. At the same time, the high-voltage input module of the motor controller is integrated on the power module mechanism, and the high-voltage input module is not integrated on the electronic control module mechanism, so it cannot be used as an independent unit module for universal application. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide an integrated high-efficiency heat dissipation electronic control housing, motor controller and electric drive assembly to solve the problems of the prior art such as complex assembly process, high heat dissipation cost and low efficiency, and large circuit parasitic inductance.

[0005] The technical solution of the present invention is: an integrated high-efficiency heat dissipation electronic control housing, comprising:

[0006] The shell is a double-cavity structure with upper and lower openings, and the shell includes a partition, and the cavity walls around the partition extend in the upper and lower directions of the partition respectively, forming a first cavity and a second cavity with the partition respectively, and an open cooling water trough is provided on the end surface of the partition facing the first cavity; a cooling water channel inlet and a cooling water channel outlet are provided on the partition or the cavity wall, and the cooling water channel inlet and the cooling water channel outlet are respectively connected to two opposite surfaces of the cooling water trough; a high-voltage input interface is provided through the cavity wall of the second cavity, and the first cavity is used to install a functional device group connected to the motor controller; the second cavity is used to install a capacitor device group connected to the motor controller.

[0007] According to an integrated high-efficiency heat dissipation electric control housing provided by the applicant, a boss is provided on the partition of the housing, and the cooling water tank is opened on the boss.

[0008] According to an integrated high-efficiency heat dissipation electronic control housing provided by the applicant, a first connection part is provided at the opening edge of the cooling water tank; a second connection part is provided in a circle close to the cavity wall in the first cavity; a third connection part is provided at the opening edge of the first cavity; and a fourth connection part is provided at the opening edge of the second cavity.

[0009] According to an integrated high-efficiency heat dissipation electric control housing provided by the applicant, a sealing ring groove is provided on the partition or boss at the opening of the cooling water tank.

[0010] Based on the same inventive concept, the present application also provides a motor controller, comprising:

[0011] A housing, wherein the housing is any of the above-mentioned integrated high-efficiency heat dissipation electronic control housings;

[0012] A filter component, the filter component is located inside the second cavity and connected to the high-voltage input interface;

[0013] A capacitor, the capacitor is installed inside the second cavity, and a side of the capacitor is connected to the filter component;

[0014] A main function module is installed inside the first cavity and connected to a first connecting portion at an opening edge of the cooling water tank.

[0015] According to a motor controller provided by the present invention, a porous copper busbar is provided on the top of the capacitor, the porous copper busbar is connected under the bottom plate of the cooling water tank and is filled with insulating glue.

[0016] According to a motor controller provided by the applicant, a bottom cover is provided under the capacitor, a plurality of connection holes are opened on the edge of the bottom cover, and the bottom cover is connected to a fourth connection portion at the edge of the opening of the second cavity; an opening is provided on the bottom cover, and the opening is located below the filter component, a small high-voltage cover is connected below the opening, and the small high-voltage cover can be removed independently of the bottom cover.

[0017] According to a motor controller provided by the present invention, a heat sink is provided at the bottom of the main function module, and the heat sink is connected to a first connecting portion at the opening edge of the cooling water tank.

[0018] According to a motor controller provided by the applicant, the main function module includes a drive control integrated board and other function modules, and the drive control integrated board is located above the other function modules; a plurality of connection holes are opened on the edge of the drive control integrated board, which are connected to the second connection part of the first cavity; a rotary transformer wiring harness is pluggable and connected on the drive control integrated board.

[0019] Based on the same inventive concept, the present application also provides an electric drive assembly, comprising: a motor, a reducer and any of the above-mentioned motor controllers, wherein the motor controller is installed on the sides of the motor and the reducer; the motor is connected to the third connecting part of the first cavity opening edge of the motor controller.

[0020] The advantages of this application are:

[0021] 1. The capacitor and the main function module of the present application share a housing, eliminating the capacitor housing, improving material utilization and reducing the production cost of the electronic control;

[0022] 2. The housing of the present application is provided with a cooling water tank, which can directly dissipate heat for the capacitor and the main functional module at the same time, thereby improving the integration level of the entire product;

[0023] 3. This application sets the main function module and the capacitor in layers, separates the high-voltage area and the low-voltage area, and effectively avoids EMC interference;

[0024] 4. The filter component of the present application is directly connected to the capacitor, which shortens the circuit length, reduces the parasitic inductance, and solves the temperature rise problem of the motor controller;

[0025] 5. The motor controller of the present application integrates a high-voltage input module and can form a controller assembly independently, which is conducive to universal application and can be used for coaxial controllers, all-in-one controllers and other new energy motor controllers in new energy motor controllers;

[0026] 6. The cooling water tank of the present application is provided on the boss of the first cavity, which enhances the structural stability of the cooling water tank;

[0027] 7. A sealing ring groove is provided on the partition or boss at the opening of the cooling water tank of the present application to prevent the coolant in the cooling water tank from overflowing and causing a short circuit problem in the motor controller;

[0028] 8. The high-voltage small cover of the present application is detachably connected to the bottom cover, which is convenient for technicians to repair the high-voltage input module separately;

[0029] 9. The drive control integrated board of the present application is inverted above the main function module, so that other function modules of the main function module are directly in contact with the cooling water tank, thereby improving the heat dissipation efficiency;

[0030] 10. The motor controller of the coaxial electric drive assembly provided in the present application is installed on the side of the motor and the reducer, which has a compact structure and can reduce the longitudinal space occupied by the electric drive assembly; BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a cross-sectional schematic diagram of the electronic control housing of the present application;

[0032] Figure 2 This is a schematic diagram of the structure and cooling water circuit of the electronic control housing of this application;

[0033] Figure 3 This is a schematic diagram of the structure of the motor controller of this application;

[0034] Figure 4 This is a schematic diagram of the structure of the motor controller of the present application from another angle;

[0035] Figure 5 This is a schematic cross-sectional structure diagram of the motor controller of this application;

[0036] Figure 6 This is an exploded schematic diagram of the structure of the motor controller of this application;

[0037] Figure 7 This is a schematic diagram of the electric drive assembly for this application;

[0038] Among them: 1-shell; 101-first cavity: 102-second cavity; 103-cooling water trough; 104-cooling water channel inlet; 105-cooling water channel outlet; 2-filter component; 3-capacitor; 4-main function module; 401-DC transfer copper bus; 402-power module; 404-current sensor; 405-three-phase output copper bus; 403-three-phase plastic bracket; 5-bottom cover; 6-high-voltage small cover; 7-drive control integrated board; 8-rotor wiring harness; 100-motor controller; 200-motor; 300-reducer. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships 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, rather than indicating or implying that the referred device or element 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.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0042] The present invention relates to an integrated high-efficiency heat dissipation electric control housing, a motor controller and an electric drive assembly. Compared with the prior art, the present invention integrates a capacitor and a power conversion module into one housing, eliminates the capacitor housing, and no longer needs to connect the capacitor housing and the power conversion module housing by bolts, thereby improving the integrity of the motor controller; the present invention can cool the capacitor and the power conversion module simultaneously through a common cooling water channel, thereby improving the degree of product integration, saving materials, reducing product costs, and improving the overall heat dissipation efficiency; different from the prior art that integrates a high-voltage input module on a power module, the present invention directly integrates the high-voltage input module on a motor controller, which is conducive to universal application, and the high-voltage input module is directly connected to the capacitor, shortening the input circuit path, effectively avoiding the heat accumulation problem caused by excessive parasitic inductance.

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0044] An integrated high-efficiency heat dissipation electronic control housing, specifically, Figure 1 , 2 As shown, it includes a shell 1, and the shell 1 is a double-cavity structure with upper and lower openings. The shell 1 includes a partition, and the cavity walls around the partition extend in the upper and lower directions of the partition respectively, and respectively form a first cavity 101 and a second cavity 102 with the partition, and an open cooling water trough 103 is provided on the end surface of the partition facing the first cavity 101; a cooling water channel inlet 104 and a cooling water channel outlet 105 are provided on the partition or the cavity wall, and the cooling water channel inlet 104 and the cooling water channel outlet 105 are respectively connected to two opposite surfaces of the cooling water trough 103; a high-voltage input interface 106 is penetrated on the cavity wall of the second cavity 102, and the first cavity 101 is used to install a functional device group connected to the motor controller; the second cavity 102 is used to install a capacitor device group connected to the motor controller.

[0045] In this embodiment, the cooling water trough 103 is a rectangular trough, and holes are respectively opened on the two narrow sides of the rectangular trough, and the two holes extend outward to the cavity wall to form a water channel, and a water channel plug is provided at the connection between the water channel and the cavity wall; the cooling water channel inlet 104 and the cooling water channel outlet 105 are respectively connected to the bottom of the two water channels, and the cooling water trough 103, the cooling water channel inlet 104 and the cooling water channel outlet 105 form a complete ∩-shaped cooling water channel, which wraps the second cavity 102; a protrusion is provided on the cavity wall of the second cavity 102, and the high-voltage input interface 106 passes through the protrusion provided on the cavity wall, and the space formed by the protrusion of the cavity wall is used to install the transition connector between the capacitor component group and the high-voltage input interface 106.

[0046] In some embodiments, Figure 1 , 2 As shown, the first cavity 101 is optimized. In this embodiment, a boss is provided on the partition of the shell 1, and the cooling water tank 103 is opened on the boss.

[0047] In fact, the partition in the shell 1 is in a "F" shape, and the protruding part in the middle forms a boss. The cooling water trough 103 is arranged on the boss. The top of the cooling water trough 103 is open, and the plane of the boss forms the bottom plate of the cooling water trough 103.

[0048] In some embodiments, Figure 2 As shown, the above-mentioned shell 1 is optimized. In this embodiment, a first connecting portion is provided at the opening edge of the cooling water tank 103; a second connecting portion is provided in a circle close to the cavity wall in the first cavity 101; a third connecting portion is provided at the opening edge of the first cavity 101; and a fourth connecting portion is provided at the opening edge of the second cavity 102.

[0049] In fact, the first connection part at the opening edge of the cooling water trough 103 includes multiple bolt connection holes for connecting the functional device group of the motor controller; the second connection part close to the cavity wall in the first cavity 101 includes multiple bolt connection columns for connecting the functional device group of the motor controller; the third connection part at the opening edge of the first cavity 101 includes multiple bolt connection holes for connecting the motor; the fourth connection part at the opening edge of the second cavity 102 includes multiple bolt connection holes for connecting the capacitor device group.

[0050] In some embodiments, Figure 2 As shown, the cooling water trough 103 is optimized. In this embodiment, a sealing ring groove is provided on the partition or boss at the opening of the cooling water trough 103.

[0051] In actual operation, the sealing ring groove can prevent the coolant in the cooling water tank 103 from overflowing and causing a short circuit problem in the motor controller.

[0052] A motor controller, specifically, Figure 3-6 As shown, it includes a shell 1, a filter component 2, a capacitor 3 and a main function module 4, the shell 1 is any of the shells 1 described above; the filter component 2 is located inside the second cavity 102, is arranged in a space formed by the protrusion of the cavity wall of the second cavity 102, and is connected to the high-voltage input interface 106; the capacitor 3 is installed inside the second cavity 102, and the side of the capacitor 3 is connected to the filter component 2; the main function module 4 is installed inside the first cavity 101, and is connected to the first connecting part at the opening edge of the cooling water tank 103.

[0053] During actual operation, the external power supply is directly connected to the high-voltage input interface 106, the high-voltage input interface 106 is connected to the filter component 2, and the filter component 2 is connected to the capacitor 3. Compared with the prior art, the high-voltage input circuit path of the present invention is greatly shortened, the parasitic inductance is reduced, and the temperature rise problem of the motor controller is solved; the main function module 4 is directly in contact with the cooling water tank 103, which greatly improves the heat dissipation capacity of the motor controller.

[0054] In some embodiments, Figure 5 , 6 As shown, the arrangement position of the capacitor 3 is optimized, and a porous copper busbar is provided on the top of the capacitor 3. The porous copper busbar is connected to the bottom of the cooling water tank 103 and is filled with insulating glue.

[0055] In fact, the porous copper busbar increases the heat dissipation area of ​​capacitor 3 and is in direct contact with the bottom plate of cooling water tank 103, which also improves the heat dissipation efficiency of capacitor 3; filling insulating glue between the porous copper busbar of capacitor 3 and the bottom plate of cooling water tank 103 can avoid short circuit problems in the motor controller.

[0056] In some embodiments, Figure 6 As shown, the above-mentioned motor controller is optimized, a bottom cover 5 is provided under the capacitor 3, a plurality of connection holes are provided on the edge of the bottom cover 5, and the bottom cover 5 is connected to the fourth connection part of the opening edge of the second cavity 102; an opening is provided on the bottom cover 5, and the opening is located below the filter component 2, and a high-voltage small cover 6 is connected below the opening, and the high-voltage small cover 6 can be disassembled independently of the bottom cover 5.

[0057] In fact, the multiple connection holes on the edge of the bottom cover 5 are bolted to the bolt connection holes of the fourth connection part on the opening edge of the second cavity 102, and the two form a closed capacitor compartment for installing structures such as the capacitor 3 and the filter component 2; the opening edge on the bottom cover 5 is provided with multiple bolt connection holes, and the edge of the high-voltage small cover 6 is provided with multiple bolt connection holes, and this is connected by bolts, which makes it easy for the high-voltage small cover 6 to be disassembled independently of the motor controller, making it convenient for the staff to perform separate maintenance and inspection on the high-voltage input module of the motor controller.

[0058] In some embodiments, Figure 6 As shown, the main function module 4 is optimized, and a heat sink is provided at the bottom of the main function module 7 , which is connected to the first connection portion at the opening edge of the cooling water tank 103 .

[0059] In actual operation, the heat sink of the main function module 4 directly covers the cooling water tank 103 , and the heat sink directly contacts the cooling water tank 103 , which not only increases the heat dissipation area of ​​the main function module 4 , but also improves the heat dissipation efficiency of the main function module 4 .

[0060] In some embodiments, Figure 6 As shown, the above-mentioned main function module 4 is optimized. In this embodiment, the main function module 4 includes a drive control integrated board 7 and other function modules. The drive control integrated board 7 is located above other function modules; a plurality of connection holes are opened on the edge of the drive control integrated board 7, which are connected to the second connection part of the first cavity 101; and a rotary transformer harness 8 is pluggable and connected to the drive control integrated board 7.

[0061] During specific installation, a plurality of bolt connection holes are opened on the edge of the drive control integrated board 7, which are connected to the bolt connection columns of the second connection part close to the cavity wall in the first cavity 101; the drive control integrated board 7 is inverted above the other functional modules of the main functional module 4, so that the other functional modules of the main functional module 4 can directly contact the cooling water tank 103, which greatly improves the heat dissipation efficiency of the main functional module 4.

[0062] In fact, the main functional module 4 also includes a DC transfer copper bus 401, a power module 402, a three-phase plastic bracket 403, a current sensor 404 and a three-phase output copper bus 405, wherein the partition below the DC transfer copper bus 401 is provided with an opening to connect the DC transfer copper bus 401 to the capacitor 3; the three-phase output copper bus 405 is connected to the motor.

[0063] The current path of the present invention is as follows: the high-voltage input interface 106 receives high-voltage direct current from an external power supply battery pack, and after being processed by the filter component 2, the current enters the capacitor 3 that temporarily stores the current, and then the capacitor 3 discharges, and the current enters the power module 402 through the DC transfer copper bus 401. After being transformed by the power module 402, the current passes through the current sensor 404 and is output to the motor by the three-phase output copper bus 405 on the three-phase plastic bracket 403, and finally drives the motor to work.

[0064] The heat dissipation principle of the present application is as follows: the coolant enters from the cooling water channel inlet 104 to dissipate the heat on the side of the capacitor 3, then the coolant enters the cooling water tank 103 and spreads out, while dissipating the heat on the top of the capacitor 3 and the bottom of the main functional module 4, then the coolant gathers at the cooling water channel outlet 105 to dissipate the heat on the other side of the capacitor 3, and finally the coolant is ejected from the cooling water channel outlet 105; the whole process can dissipate heat on three sides of the capacitor 3, the capacitor 3 is in direct contact with the cooling water tank 103, the heat dissipation efficiency is high, the cost of the motor controller is reduced, and the integration of the motor controller is improved.

[0065] Based on the same inventive concept, the present application also provides an electric drive assembly, such as Figure 7 As shown, it includes a motor controller 100, a motor 200 and a reducer 300. The motor controller 100 is any of the above-mentioned integrated modular high-efficiency heat dissipation motor controllers. Different from the prior art in which the motor controller 100 is installed directly above the motor 200, the motor controller 100 of the present invention is installed on the side of the motor 200 and the reducer 300, and the structure is more compact, which reduces the precious longitudinal space of the electric vehicle occupied by the electric drive assembly.

[0066] During specific installation, the motor 200 and the motor controller 100 are connected by connecting the motor 200 and the motor controller 100 through a plurality of bolt connection holes of the third connection portion of the first cavity 101 .

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An integrated high-efficiency heat dissipation electronic control housing, characterized in that: include: A shell (1), the shell (1) is a double-cavity structure with upper and lower openings, the shell (1) comprising a partition, the cavity walls around the partition respectively extending in the upper and lower directions of the partition, respectively forming a first cavity (101) and a second cavity (102) with the partition, and an open cooling water trough (103) is arranged on the end surface of the partition facing the first cavity (101); a cooling water channel inlet (104) and a cooling water channel outlet (105) are opened on the partition or the cavity wall, and the cooling water channel inlet (104) and the cooling water channel outlet (105) are respectively connected to two opposite surfaces of the cooling water trough (103); a high-voltage input interface (106) is provided through the cavity wall of the second cavity (102), the first cavity (101) is used to install a functional device group connected to a motor controller; the second cavity (102) is used to install a capacitor device group connected to the motor controller.

2. An integrated high-efficiency heat dissipation electronic control housing as claimed in claim 1, characterized in that: A boss is provided on the partition plate of the shell (1), and the cooling water tank (103) is opened on the boss.

3. An integrated high-efficiency heat dissipation electronic control housing as claimed in claim 1 or 2, characterized in that: A first connection portion is provided at the opening edge of the cooling water tank (103); a second connection portion is provided around the first cavity (101) near the cavity wall; a third connection portion is provided at the opening edge of the first cavity (101); and a fourth connection portion is provided at the opening edge of the second cavity (102).

4. The integrated high-efficiency heat dissipation electronic control housing according to claim 1, characterized in that: A sealing ring groove is provided on the partition plate or the boss at the opening of the cooling water tank (103).

5. A motor controller comprising the electric control housing according to any one of claims 1 to 4, characterized in that: include: A housing (1), wherein the housing (1) is the housing (1) according to any one of claims 1 to 4; A filter component (2), the filter component (2) being located inside the second cavity (102) and close to the high-voltage input interface (106), and being electrically connected to the high-voltage input interface (106); A capacitor (3), the capacitor (3) being installed inside the second cavity (102) and close to the bottom of the cooling water tank (103); A main function module (4), the main function module (4) is installed inside the first cavity (101), and the main function module (4) is connected to a first connection portion at an opening edge of the cooling water tank (103).

6. A motor controller as claimed in claim 5, characterized in that: A porous copper busbar is provided on the top of the capacitor (3), the porous copper busbar is connected to the bottom of the bottom plate of the cooling water tank (103) and is filled with insulating glue.

7. A motor controller as claimed in claim 5 or 6, characterized in that: A bottom cover (5) is provided below the capacitor (3), and a plurality of connection holes are provided on the edge of the bottom cover (5), which are connected to a fourth connection portion at the opening edge of the second cavity (102); an opening is provided on the bottom cover (5), and the opening is located below the filter assembly (2), and a high-voltage small cover (6) is connected below the opening, and the high-voltage small cover (6) can be disassembled independently of the bottom cover (5).

8. A motor controller as claimed in claim 5, characterized in that: A heat sink is provided at the bottom of the main function module (4), and the heat sink is sealedly connected to a first connection portion at the opening edge of the cooling water tank (103).

9. A motor controller as claimed in claim 5 or 8, characterized in that: The main function module (4) comprises a drive control integrated board (7) and a plurality of function modules, wherein the drive control integrated board (7) is located above the plurality of function modules; a plurality of connection holes are provided on the edge of the drive control integrated board (7) and are connected to the second connection portion of the first cavity (101).

10. An electric drive assembly comprising a motor controller as claimed in any one of claims 5 to 9, characterized in that: The invention comprises a motor controller (100), a motor (200) and a reducer (300), wherein the motor controller (100) is a motor controller as described in any one of claims 5 to 9, and the motor controller (100) is installed on the side of the motor (200) and the reducer (300); the motor (200) is connected to a third connecting portion at the opening edge of the first cavity (101) of the motor controller (100).

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