Electric drive assembly and vehicle

Abstract

An electric drive assembly (10), relating to the field of new energy vehicles. The electric drive assembly (10) comprises a motor assembly (100), an electric control assembly (200), and a cooling component (300). The electric control assembly (200) is arranged beside the motor assembly (100), the cooling component (300) being arranged between the electric control assembly (200) and the motor assembly (100). The motor assembly (100) comprises a housing (110), a speed reducer (120), and a driving motor (130). The housing (110) is arranged around the outer side of the driving motor (130) and has a first housing part (113) and a second housing part (114), an accommodating cavity (115) being formed between the first housing part (113) and the second housing part (114). The speed reducer (120) is arranged on the outer side of the housing (110). The cooling component (300) comprises a first cooling unit (310) and a second cooling unit (320), the first cooling unit (310) being arranged between the electric control assembly (200) and the motor assembly (100), and the second cooling unit (320) being arranged inside the accommodating cavity (115). The first cooling unit (310) and the second cooling unit (320) are both provided with cooling channels that are in communication with each other, a cooling medium flowing in the cooling channels so as to cool the electric drive assembly (10). Further provided is a vehicle. In the electric drive assembly and the vehicle, routes of cooling water channels are shortened, thereby improving cooling efficiency.

Description

Electric drive assembly and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 31, 2024, with application number 202410140640.6 and application name “An Electric Drive Assembly and Vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to, but is not limited to, the field of new energy vehicle technology, and in particular to an electric drive assembly and a vehicle. Background Art

[0003] The electric drive assembly is the core component that determines the vehicle's power, energy consumption and other performance. Its function is to convert chemical energy into kinetic energy of the electric vehicle. It is a drive system that uses an electric motor as a power source, including a motor controller, an electric motor and a reducer.

[0004] At present, the motors, reducers and electronic controls in the electric drive powertrains of existing new energy vehicles are mostly split structures with low integration, resulting in low space utilization. In addition, the cooling water channels set in the conventional electric drive powertrain structure are two sets of cooling water channels, that is, the cooling system of the motor stator and the cooling system in the electronic control assembly are set separately.

[0005] However, the cooling system water channel layout path in this traditional electric drive assembly structure is long, and the cooling water flow resistance is large, resulting in low cooling efficiency. Summary of the Invention

[0006] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0007] The present application provides an electric drive assembly and a vehicle, which shorten the path of the cooling water channel, thereby reducing the cooling water flow resistance and increasing the cooling efficiency.

[0008] In the first aspect, the present application provides an electric drive assembly, comprising a motor assembly, an electronic control assembly and a cooling assembly; the electronic control assembly is arranged on the side of the motor assembly, and the cooling assembly is arranged between the electronic control assembly and the motor assembly; the motor assembly comprises a housing, a reducer and a drive motor; the housing is arranged around the outside of the drive motor, and the housing has a first housing portion and a second housing portion arranged in sequence from the inside to the outside, and a accommodating cavity surrounding the outside of the drive motor is formed between the first housing portion and the second housing portion, and the reducer is arranged on the outside of the housing and connected to the output end of the drive motor; the cooling assembly comprises a first cooling unit and a second cooling unit, the first cooling unit is arranged between the electronic control assembly and the motor assembly, and the second cooling unit is arranged inside the accommodating cavity, the first cooling unit and the second cooling unit respectively have cooling channels that are connected in sequence, and cooling medium flows in the cooling channels of the first cooling unit and the second cooling unit to cool the electric drive assembly.

[0009] As in the electric drive assembly described above, optionally, the cooling channel of the second cooling unit is spiral and wound around the outside of the drive motor.

[0010] As for the electric drive assembly described above, optionally, the shell has a water inlet and a water outlet connected to the accommodating cavity, the water inlet is connected to the cooling channel outlet of the first cooling unit, and the water outlet is connected to the cooling channel outlet of the second cooling unit.

[0011] As in the electric drive assembly described above, optionally, the shell further includes a partition portion, which is connected between the first shell portion and the second shell portion to isolate an installation area in the accommodating cavity, and the shape of the installation area matches the shape of the cooling channel.

[0012] As for the electric drive assembly described above, optionally, the electronic control assembly and the motor assembly are arranged side by side in the vertical direction, and the electronic control assembly and the motor assembly are connected by fasteners.

[0013] As for the electric drive assembly mentioned above, optionally, the electronic control assembly includes a motor controller, an on-board charger and a DC-DC converter. The motor controller includes a rotary transformer, a filter and a capacitor. The rotary transformer is electrically connected to the drive motor, and the filter and the capacitor are arranged in parallel in the filter housing.

[0014] As in the electric drive assembly described above, optionally, the motor controller is provided with multiple input interfaces, and the multiple input interfaces are threaded interfaces.

[0015] As in the electric drive assembly described above, optionally, the rotating transformer includes a transformer body and a transformer shell arranged around the outside of the transformer body, and the inner wall of the transformer shell is provided with a shielding cover; the shielding cover is provided with at least one mounting portion, the shielding cover is fixed to the transformer shell through the mounting portion, and the transformer shell and the filter shell are arranged on the electric control assembly shell.

[0016] As in the electric drive assembly described above, optionally, the housing further includes a front end cover, which is disposed at one end of the drive motor, and the first housing portion and the second housing portion are both connected to the front end cover; an extension bracket is disposed on the front end cover, and the motor controller is disposed on the extension bracket.

[0017] In a second aspect, the present application provides a vehicle comprising the above-mentioned electric drive assembly.

[0018] The present application provides an electric drive assembly and vehicle, which relate to the field of new energy vehicles. The electric drive assembly includes a motor assembly, an electronic control assembly, and a cooling assembly. The electronic control assembly is arranged on the side of the motor assembly, and the cooling assembly is arranged between the electronic control assembly and the motor assembly. The motor assembly includes a housing, a reducer, and a drive motor. The housing is arranged around the outside of the drive motor and has a first housing portion and a second housing portion. A receiving cavity is formed between the first housing portion and the second housing portion. The reducer is arranged on the outside of the housing. The cooling assembly includes a first cooling unit and a second cooling unit. The first cooling unit is arranged between the electronic control assembly and the motor assembly, and the second cooling unit is arranged inside the receiving cavity. The first cooling unit and the second cooling unit respectively have cooling channels that are connected in sequence, and cooling medium flows in the cooling channels to cool the electric drive assembly. The present application provides an electric drive assembly and a vehicle, which shortens the path of the cooling water channel and improves the cooling efficiency.

[0019] The electric drive assembly and vehicle structure provided by the present application, as well as its other application purposes and beneficial effects, will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. Other aspects will be understood after reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a front view of an electric drive assembly provided in an embodiment of the present application;

[0021] FIG2 is a left side view of an electric drive assembly provided in an embodiment of the present application;

[0022] FIG3 is a front view of a drive motor in an electric drive assembly provided in an embodiment of the present application;

[0023] FIG4 is a schematic structural diagram of a drive motor in an electric drive assembly provided in an embodiment of the present application from one perspective;

[0024] FIG5 is a schematic structural diagram of a drive motor in an electric drive assembly provided in an embodiment of the present application from another perspective;

[0025] FIG6 is a schematic diagram of a housing of a motor assembly in an electric drive assembly provided in an embodiment of the present application;

[0026] FIG7 is a cross-sectional view taken along line AA in FIG6 ;

[0027] FIG8 is a front view of a cooling component in an electric drive assembly provided in an embodiment of the present application;

[0028] FIG8a is a schematic structural diagram of a first cooling unit in an electric drive assembly provided in an embodiment of the present application;

[0029] FIG8b is a schematic structural diagram of a second cooling unit in an electric drive assembly provided in an embodiment of the present application;

[0030] FIG9 is a top view of a cooling component in an electric drive assembly provided in an embodiment of the present application;

[0031] FIG10 is a schematic structural diagram of a rotary transformer of an electric control assembly in an electric drive assembly provided in an embodiment of the present application;

[0032] FIG11 is a schematic structural diagram of a filter and a capacitor of an electric control assembly in an electric drive assembly provided in an embodiment of the present application.

[0033] Explanation of Reference Numerals: 10 - electric drive assembly; 100 - motor assembly; 110 - housing; 111 - water inlet; 112 - water outlet; 113 - first housing portion; 114 - second housing portion; 115 - accommodating chamber; 120 - reducer; 130 - drive motor; 200 - electronic control assembly; 210 - fastener; 220 - rotary transformer; 230 - shielding cover; 240 - mounting portion; 250 - filter housing; 260 - capacitor; 270 - filter; 280 - transformer housing; 300 - cooling assembly; 310 - first cooling unit; 320 - second cooling unit; 330 - cooling channel inlet of the first cooling unit; 340 - cooling channel outlet of the first cooling unit; 350 - cooling channel inlet of the second cooling unit; 360 - cooling channel outlet of the second cooling unit; 370-Onboard charger and DC-DC converter water channel; 380-Motor controller water channel; 390-Separator. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] The electric drive assembly is the core component that determines the vehicle's power, energy consumption and other performance. Its function is to convert chemical energy into kinetic energy of the electric vehicle. It is a drive system that uses an electric motor as a power source, including a motor controller, an electric motor and a reducer.

[0036] At present, the motors, reducers and electronic controls in the electric drive powertrains of existing new energy vehicles are mostly split structures with low integration, resulting in low space utilization. In addition, the cooling water channels set in the conventional electric drive powertrain structure are two cooling water channels, that is, the cooling system of the motor stator and the cooling system in the electronic control assembly are set separately.

[0037] However, the cooling system water channel layout path in this traditional electric drive assembly structure is long, and the cooling water flow resistance is large, resulting in low cooling efficiency.

[0038] To this end, the present application provides an electric drive assembly and a vehicle, which improves the space utilization inside the electric drive assembly and reduces the weight of the electric drive assembly by integrating the drive motor and the reducer into a motor assembly, integrating the motor controller, the rotary transformer, the on-board charger, etc. into an electronic control assembly, and connecting the motor assembly and the electronic control assembly through fasteners; adopting a design in which the electronic control assembly and the motor assembly share a cooling system, the cooling component is arranged between the motor assembly and the electronic control assembly, so that the coolant can take away the heat of the motor assembly and the electronic control assembly when flowing through the cooling component. Compared with the traditional electric drive assembly structure, the path of the cooling water channel can be shortened, the water flow resistance can be reduced, and the cooling efficiency of the electric drive assembly can be improved.

[0039] An electric drive assembly in this embodiment is further described below.

[0040] FIG1 is a front view of an electric drive assembly provided in an embodiment of the present application; FIG2 is a left view of an electric drive assembly provided in an embodiment of the present application; FIG3 is a front view of a drive motor in an electric drive assembly provided in an embodiment of the present application; FIG4 is a structural schematic diagram of a drive motor in an electric drive assembly provided in an embodiment of the present application from one perspective; FIG5 is a structural schematic diagram of a drive motor in an electric drive assembly provided in an embodiment of the present application from another perspective; FIG6 is a schematic diagram of the housing of a motor assembly in an electric drive assembly provided in an embodiment of the present application; FIG7 is a cross-sectional view taken along line AA in FIG6; FIG8 is a cross-sectional view taken along line AA in FIG6; FIG9 is a cross-sectional view taken along line AA in FIG9; FIG10 is a cross-sectional view taken along line AA in FIG11. A main view of a cooling component in an electric drive assembly provided in an embodiment of the application; Figure 8a is a structural schematic diagram of a first cooling unit in an electric drive assembly provided in an embodiment of the present application; Figure 8b is a structural schematic diagram of a second cooling unit in an electric drive assembly provided in an embodiment of the present application; Figure 9 is a top view of a cooling component in an electric drive assembly provided in an embodiment of the present application; Figure 10 is a structural schematic diagram of a rotary transformer of an electronic control assembly in an electric drive assembly provided in an embodiment of the present application; Figure 11 is a structural schematic diagram of a filter and a capacitor of an electronic control assembly in an electric drive assembly provided in an embodiment of the present application.

[0041] As shown in Figures 1 to 3, the embodiment of the present application provides an electric drive assembly 10, including a motor assembly 100, an electric control assembly 200 and a cooling assembly 300; the electric control assembly 200 is arranged on the side of the motor assembly 100, and the cooling assembly 300 is arranged between the electric control assembly 200 and the motor assembly 100; the motor assembly 100 includes a housing 110, a reducer 120 and a drive motor 130; the housing 110 is arranged around the outside of the drive motor 130, and the housing 110 has a first housing portion 113 and a second housing portion 114 that are sequentially spaced from the inside to the outside, and a surrounding space is formed between the first housing portion 113 and the second housing portion 114. The accommodating cavity 115 is located outside the driving motor 130, and the reducer 120 is arranged on the outside of the shell 110 and is connected to the output end of the driving motor 130; the cooling assembly 300 includes a first cooling unit 310 and a second cooling unit 320, the first cooling unit 310 is arranged between the electronic control assembly 200 and the motor assembly 100, and the second cooling unit 320 is arranged inside the accommodating cavity 115, the first cooling unit 310 and the second cooling unit 320 respectively have cooling channels that are connected in sequence, and cooling medium flows in the cooling channels of the first cooling unit 310 and the second cooling unit 320 to cool the electric drive assembly 10.

[0042] Among them, the cooling system in this embodiment is a closed forced circulation water cooling system, and the cooling process of the electric drive assembly 10 is controlled by the vehicle thermal management system. Specifically, the coolant provided by the vehicle thermal management system first enters the vehicle charger and DC-DC converter water channel 370 through the cooling channel inlet 330 of the first cooling unit, and removes the heat generated by them through heat exchange. At this time, the coolant temperature rises, and then the coolant flows into the motor controller water channel 380, and removes the heat generated by the motor controller through heat exchange. At this time, the coolant temperature rises again, and then the coolant flows into the second cooling unit 320 through the cooling channel inlet 350 of the second cooling unit, and removes the heat generated by the drive motor 130 through heat exchange through the housing 110. At this time, the coolant flows back to the vehicle thermal management system through the cooling channel outlet 360 of the second cooling unit, undergoes heat exchange in the thermal management system, and flows into the cooling channel inlet 330 of the first cooling unit again after the temperature drops, completing a cooling cycle.

[0043] Among them, the first cooling unit 310 includes a motor controller water channel 380, an on-board charger and a DC-DC converter water channel 370. As shown in Figure 9, the motor controller water channel 380, the on-board charger and the DC-DC converter water channel 350 are arranged in a line, and the second cooling unit 320 is arranged in a spiral shape below the motor controller water channel 380. This can shorten the path of the cooling water channel and reduce the flow resistance of the coolant.

[0044] It should be noted that in order to prevent the coolant from freezing at low temperatures, the coolant is mixed with water and ethylene glycol in a ratio of 1:1, which can lower the freezing point to minus 40 degrees Celsius.

[0045] In this way, the drive motor 130 and the reducer 120 are integrated into the motor assembly 100, and the motor controller, the rotary transformer 220, the on-board charger, etc. are integrated into the electronic control assembly 200. The motor assembly 100 and the electronic control assembly 200 are connected by fasteners 210, thereby improving the space utilization inside the electric drive assembly 10 and reducing the weight of the electric drive assembly 10; the electronic control assembly 200 and the motor assembly 100 share a cooling system design, and the cooling component 300 is set between the motor assembly 100 and the electronic control assembly 200, so that the coolant can take away the heat of the motor assembly 100 and the electronic control assembly 200 when flowing through the cooling component 300. Compared with the traditional electric drive assembly structure, the path of the cooling water channel can be shortened, the water flow resistance can be reduced, and the cooling efficiency of the electric drive assembly can be improved.

[0046] In some embodiments, the cooling channel of the second cooling unit 320 is spiral and coiled around the outside of the drive motor 130. Specifically, the cooling channel on the side in contact with the drive motor 130 is flat. The purpose of this design is to increase the contact area with the second shell part 114, improve the heat conduction efficiency, and make the heat transfer uniform.

[0047] In some embodiments, the housing 110 has a water inlet 111 and a water outlet 112 communicating with the accommodating cavity 115 , the water inlet 111 is connected to the cooling channel outlet 340 of the first cooling unit, and the water outlet 112 is connected to the cooling channel outlet 360 of the second cooling unit.

[0048] In which, the cooling component 300 is fixed to the electronic control assembly 200 by a rolled strip. Specifically, the first cooling unit 310 is provided with a cooling channel inlet 330 of the first cooling unit and a cooling channel outlet 340 of the first cooling unit, and the second cooling unit 320 is provided with a cooling channel inlet 350 of the second cooling unit and a cooling channel outlet 360 of the second cooling unit. As shown in Figures 8a and 8b, the cooling channel outlet 340 of the first cooling unit and the cooling channel inlet 350 of the second cooling unit are connected by interference fit.

[0049] In some embodiments, the housing 110 further includes a partition 390 connected between the first housing portion 113 and the second housing portion 114 to isolate a mounting area in the accommodating cavity 115 , wherein the shape of the mounting area matches the shape of the cooling channel.

[0050] Among them, the partition 390 has two types: return type and spiral type. Optionally, in this embodiment, a spiral partition 390 is distributed on the second shell part 114, as shown in Figure 7. Specifically, a certain distance is set between two adjacent spiral tubes in the second cooling unit 320 for clamping with the partition 390, which can ensure the connection stability of the second cooling unit 320.

[0051] In some embodiments, the electronic control assembly 200 and the motor assembly 100 are arranged side by side in the vertical direction, and the electronic control assembly 200 and the motor assembly 100 are connected by a fastener 210 .

[0052] Among them, mounting holes are provided around the electronic control assembly 200, and fasteners 210 pass through the mounting holes to detachably connect the electronic control assembly 200 and the motor assembly 100, as shown in Figure 4. The purpose of this design is to facilitate the later maintenance and replacement of internal components of the electronic control assembly 200 and the motor assembly 100. Specifically, the type of fastener 210 can be a bolt, a nut, or other, which is not limited in this embodiment.

[0053] In some embodiments, the electronic control assembly 200 includes a motor controller, an on-board charger and a DC-DC converter; the motor controller includes a rotary transformer 220, a filter 270 and a capacitor 260, the rotary transformer 220 is electrically connected to the drive motor 130, and the filter 270 and the capacitor 260 are arranged in parallel in the filter housing 250, as shown in Figure 11.

[0054] Capacitor 260 primarily consists of thin-film capacitors and positive and negative output copper busbars, while filter 270 comprises an input copper busbar, two magnetic rings, and four safety capacitors. Epoxy glue is used to secure the gap between capacitor 260 and filter 270 for insulation and thermal conductivity. Specifically, the high-voltage DC power from the power battery passes through the input copper busbar, is filtered by filter 270, and then connected to the output copper busbar. Thin-film capacitors are connected in parallel between the positive and negative copper busbars to smooth the busbar voltage. The overlapping arrangement of the positive and negative copper busbars eliminates stray inductance.

[0055] Among them, the number of input interfaces of the filter 270 is two, the input interface is connected to the DC bus connector, and then connected to the power battery as a high-voltage input, and the number of output interfaces of the capacitor 260 is six, which are respectively connected to the input port of the insulated-gate bipolar transistor (IGBT) power module to provide high-voltage power to the IGBT.

[0056] Among them, in order to reduce the weight of the electronic control assembly 200, the motor controller, on-board charger and DC-DC converter are integrated into one. Specifically, the on-board charger and DC-DC converter are arranged adjacent to each other at one end of the electronic control assembly 200. The on-board charger is provided with a slow charging interface for converting AC power from the power grid into DC power to charge the electric vehicle battery. The DC-DC converter converts the DC high voltage in the car battery into DC low voltage to power the on-board power supply and the functional modules on its electrical circuit.

[0057] It should be added that the electronic control assembly 200 also includes a power distribution unit (PDU) that electrically connects high-voltage components through busbars and wiring harnesses to provide charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, low-voltage control and other functions for the high-voltage system of new energy vehicles, thereby protecting and monitoring the operation of the high-voltage system.

[0058] It should be added that the electronic control assembly 200 also includes a vehicle control unit (VCU) responsible for the normal driving of the vehicle, brake energy feedback, energy management of the vehicle drive system and power battery, network management, fault diagnosis and processing, vehicle status monitoring, etc., so as to ensure that the vehicle operates normally and stably with good power, high economy and reliability.

[0059] Among them, the rotary transformer 220 is a position sensor used to reflect the position, speed and rotation direction of the rotor of the drive motor 130. The rotary transformer 220 includes a stator and a rotor. Specifically, the stator of the rotary transformer 220 is installed on the rear end cover of the drive motor 130, and the rotor is installed on the motor shaft and rotates with the motor shaft.

[0060] In some embodiments, the motor controller is provided with multiple input interfaces, wherein the multiple input interfaces are divided into a DC bus high-voltage line interface and a DC fast charging high-voltage line interface, and the multiple input interfaces are threaded interfaces. The purpose of this setting is to save the two plug-in sockets and high-voltage interlocking wire structure in the quick-plug interface method, thereby saving costs and making the connection more reliable.

[0061] In some embodiments, the rotating transformer 220 includes a transformer body and a transformer shell 280 arranged around the outside of the transformer body, and the inner wall of the transformer shell 280 is provided with a shielding cover 230; the shielding cover 230 is provided with at least one mounting portion 240, and the shielding cover 230 is fixed to the transformer shell 280 through the mounting portion 240, and the transformer shell 280 and the filter shell 250 are arranged on the electronic control assembly shell.

[0062] As shown in FIG10 , three mounting portions are provided along the circumference of the shielding cover 230 , and threaded holes are provided in the mounting portions. Screws pass through the threaded holes to firmly mount the shielding cover 230 on the transformer housing 280 . Specifically, the shielding cover 230 is rectangular in shape and can completely cover the rotary transformer 220 . The purpose of this design is to prevent electromagnetic radiation caused by the rotary transformer 220 during operation, and at the same time, it can also protect the rotary transformer 220 from malfunctioning due to external interference.

[0063] Specifically, the shielding cover 230 is made of stainless steel. The purpose of this setting is that electronic components often need to work in a humid and corrosive environment. Stainless steel has strong corrosion resistance and a long service life.

[0064] In some embodiments, the housing 110 further includes a front end cover, which is disposed at one end of the drive motor 130 , and the first housing portion 113 and the second housing portion 114 are both connected to the front end cover;

[0065] An extension bracket is arranged on the front end cover, and a motor controller is arranged on the extension bracket.

[0066] The first housing portion 113 and the front end cover are integrally formed, and the second housing portion 114 is sleeved on the first housing portion 113. Specifically, a mounting hole is provided on the extension bracket, and bolts pass through the mounting hole to connect the motor controller to the bracket.

[0067] In some embodiments, a vehicle includes the electric drive assembly 10 described above.

[0068] The reducer 120 adopts self-stirring oil splash cooling lubrication, and heat is dissipated through heat exchange between the reducer housing and the air. Specifically, the above-mentioned electric drive assembly 10 is suitable for electric cars and electric pickup trucks.

[0069] In this embodiment, an electric drive assembly 10 includes a motor assembly 100, an electric control assembly 200, and a cooling assembly 300; the electric control assembly 200 is arranged on the side of the motor assembly 100, and the cooling assembly 300 is arranged between the electric control assembly 200 and the motor assembly 100; the motor assembly 100 includes a housing 110, a reducer 120, and a drive motor 130; the housing 110 is arranged around the outside of the drive motor 130, and the housing 110 has a first housing portion 113 and a second housing portion 114 arranged in sequence from the inside to the outside, and the first housing portion 113 and the second housing portion 114 form a surrounding area around the drive motor 130. 0 outside the accommodating cavity 115, the reducer 120 is arranged on the outside of the housing 110 and is connected to the output end of the drive motor 130; the cooling assembly 300 includes a first cooling unit 310 and a second cooling unit 320, the first cooling unit 310 is arranged between the electronic control assembly 200 and the motor assembly 100, and the second cooling unit 320 is arranged inside the accommodating cavity 115, the first cooling unit 310 and the second cooling unit 320 respectively have cooling channels that are connected in sequence, and cooling medium flows in the cooling channels of the first cooling unit 310 and the second cooling unit 320 to cool the electric drive assembly 10. In this way, the drive motor 130 and the reducer 120 are integrated into the motor assembly 100, and the motor controller, the rotary transformer 220, the on-board charger, etc. are integrated into the electronic control assembly 200. The motor assembly 100 and the electronic control assembly 200 are connected by fasteners 210, thereby improving the space utilization inside the electric drive assembly 10 and reducing the weight of the electric drive assembly 10; the electronic control assembly 200 and the motor assembly 100 share a cooling system design, and the cooling component 300 is set between the motor assembly 100 and the electronic control assembly 200, so that the coolant can take away the heat of the motor assembly 100 and the electronic control assembly 200 when flowing through the cooling component 300. Compared with the traditional electric drive assembly structure, the path of the cooling water channel can be shortened, the water flow resistance can be reduced, and the cooling efficiency of the electric drive assembly can be improved.

[0070] The terms "first," "second," and the like in the embodiments of the present application are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to facilitate the description of the embodiments of the present application herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0071] In the embodiments of the present application, the terms "upper", "lower", "inside", "middle", "outside", "front", "back", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to being constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood based on the specific circumstances.

[0072] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0073] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0074] In general, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a" and "an" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric drive assembly comprising a motor assembly, an electric control assembly, and a cooling assembly; the electric control assembly is disposed to the side of the motor assembly, and the cooling assembly is disposed between the electric control assembly and the motor assembly; The motor assembly includes a housing, a reducer, and a drive motor; the housing is arranged around the outside of the drive motor, and the housing has a first housing portion and a second housing portion arranged in sequence from the inside to the outside, and a receiving cavity surrounding the outside of the drive motor is formed between the first housing portion and the second housing portion. The reducer is arranged outside the housing and connected to the output end of the drive motor; The cooling assembly includes a first cooling unit and a second cooling unit. The first cooling unit is arranged between the electronic control assembly and the motor assembly, and the second cooling unit is arranged inside the accommodating cavity. The first cooling unit and the second cooling unit respectively have cooling channels that are connected in sequence, and cooling medium flows in the cooling channels of the first cooling unit and the second cooling unit to cool the electric drive assembly.

2. The electric drive assembly according to claim 1, wherein: The cooling channel of the second cooling unit is spiral and coiled around the outside of the drive motor.

3. The electric drive assembly according to claim 1, wherein: The shell has a water inlet and a water outlet communicated with the accommodating cavity, the water inlet is connected to the cooling channel outlet of the first cooling unit, and the water outlet is connected to the cooling channel outlet of the second cooling unit.

4. The electric drive assembly according to claim 3, wherein: The housing further includes a partition portion connected between the first housing portion and the second housing portion to isolate a mounting area in the accommodating cavity. The shape of the mounting area matches the shape of the cooling channel.

5. The electric drive assembly according to any one of claims 1 to 4, wherein: The electronic control assembly and the motor assembly are arranged side by side in a vertical direction, and the electronic control assembly and the motor assembly are connected by fasteners.

6. The electric drive assembly according to claim 5, wherein: The electronic control assembly includes a motor controller, an on-board charger and a DC-DC converter; The motor controller includes a rotary transformer, a filter and a capacitor. The rotary transformer is electrically connected to the drive motor. The filter and the capacitor are arranged in parallel in a filter housing.

7. The electric drive assembly according to claim 6, wherein: The motor controller is provided with a plurality of input interfaces, and the plurality of input interfaces are threaded interfaces.

8. The electric drive assembly according to claim 6, wherein: The rotary transformer includes a transformer body and a transformer shell arranged around the outside of the transformer body, and a shielding cover is provided on the inner side wall of the transformer shell; the shielding cover is provided with at least one mounting portion, and the shielding cover is fixed to the transformer shell through the mounting portion, and the transformer shell and the filter shell are arranged on the electronic control assembly shell.

9. The electric drive assembly according to any one of claims 1 to 4, wherein: The housing further comprises a front end cover, the front end cover being arranged at one end of the drive motor, the first housing portion and the second housing portion being both connected to the front end cover; An extension bracket is provided on the front end cover, and the motor controller is provided on the extension bracket.

10. A vehicle, wherein: Comprising the electric drive assembly according to any one of claims 1 to 9.

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