Electric drive assembly and vehicle

Abstract

As an electric drive assembly (10), the electric drive assembly (10) relates to the field of new energy vehicles, and 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 installed on the side of the motor assembly (100), and the cooling component (300) is installed between the electric control assembly (200) and the motor assembly (100); the motor assembly (100) comprises a housing (110), a reduction gear (120), and a drive motor (130); the housing (110) is installed surrounding the outside of the drive motor (130) and is equipped with a first housing portion (113) and a second housing portion (114), and a receiving cavity (115) is formed between the first housing portion (113) and the second housing portion (114), and the reduction gear (120) is installed on the outside of the housing (110); The cooling component (300) includes a first cooling unit (310) and a second cooling unit (320), the first cooling unit (310) is installed between the electric control assembly (200) and the motor assembly (100), and the second cooling unit (320) is installed inside the receiving cavity (115). The first cooling unit (310) and the second cooling unit (320) each have a cooling passage connected sequentially, and a cooling medium flows through all of the cooling passages to cool the electric drive assembly (10). A vehicle is further provided. The electric drive assembly and the vehicle shorten the path of the cooling water channel, thereby improving cooling efficiency.

Description

Technology Field

[0001] This application relates to the field of new energy vehicle technology, but is not limited thereto, and in particular to electric drive assemblies and vehicles.

[0002] The present application claims priority to a Chinese patent application filed with the Chinese Patent Office on January 31, 2024, with application number 202410140640.6 and titled “Electric drive assembly and vehicle,” the entire contents of which are incorporated into the present application by reference. Background Technology

[0003] The electric drive assembly is a key component that determines performance characteristics such as vehicle power and energy consumption. Its role is to convert chemical energy into kinetic energy for electric vehicles, and as a drive system utilizing a motor as kinetic energy, it includes a motor controller, a motor, and a reduction gear.

[0004] Currently, in existing new energy vehicle electric drive assemblies, the motor, reduction gear, and motor controller are mostly separated into a single structure. Due to their low integration density, space utilization is poor, and the cooling water channels installed in typical electric drive assembly structures consist of two sets; that is, the cooling system of the motor stator and the cooling system of the electric control assembly are installed separately.

[0005] However, in these conventional electric drive assembly structures, the arrangement path of the cooling system water channels is long and the resistance to cooling water flow is relatively high, resulting in relatively low cooling efficiency. The problem to be solved

[0006] The following is an overview of the subject matter described in detail in this specification. This overview is not intended to limit the scope of protection of the claims.

[0007] The present application provides an electric drive assembly and a vehicle, thereby shortening the path of the cooling water channel so that the cooling water flow resistance is relatively low and the cooling efficiency is relatively high. means of solving the problem

[0008] In a first aspect, the present application provides an electric drive assembly comprising a motor assembly, an electric control assembly, and a cooling component; the electric control assembly is installed on the side of the motor assembly, and the cooling component is installed between the electric control assembly and the motor assembly; the motor assembly comprises a housing, a reduction gear, and a drive motor; the housing is installed around the outside of the drive motor, and the housing has a first housing portion and a second housing portion spaced apart from the inside to the outside, and a receiving cavity is formed between the first housing portion and the second housing portion to surround the outside of the drive motor, and the reduction gear is installed on the outside of the housing and connected to the output end of the drive motor; the cooling component comprises a first cooling unit and a second cooling unit, the first cooling unit is installed between the electric control assembly and the motor assembly, and the second cooling unit is installed inside the receiving cavity, and the first cooling unit and the second cooling unit each have a cooling passage connected sequentially, and a cooling medium flows through the cooling passages of both the first cooling unit and the second cooling unit to cool the electric drive assembly.

[0009] In the electric drive assembly described above, optionally, the cooling passage of the second cooling unit forms a spiral and is wound on the outside of the drive motor.

[0010] In the electric drive assembly described above, optionally, the housing is provided with an inlet and an outlet communicating with a receiving cavity, the inlet is connected to the cooling passage outlet of the first cooling unit, and the outlet is connected to the cooling passage outlet of the second cooling unit.

[0011] In the electric drive assembly described above, optionally, the housing further includes a separator, the separator being connected between the first housing part and the second housing part to separate a mounting area within a receiving cavity, and the shape of the mounting area matches the shape of the cooling passage.

[0012] In the electric drive assembly described above, optionally, the electric control assembly and the motor assembly are installed in parallel in the vertical direction, and the electric control assembly and the motor assembly are connected through a fastening member.

[0013] In the electric drive assembly described above, optionally, the electric control assembly includes a motor controller, a vehicle-mounted charger, and a DC-DC converter, and the motor controller includes a resolver, a filter, and a capacitor, the resolver is electrically connected to the drive motor, and the filter and capacitor are installed in parallel within the filter housing.

[0014] In the electric drive assembly described above, optionally, a plurality of input interfaces are installed in the motor controller, and the plurality of input interfaces are screw-type interfaces.

[0015] In the electric drive assembly described above, optionally, the resolver comprises a transformer body and a transformer housing installed around the outside of the transformer body, and a shielding cover is installed on the inner wall of the transformer housing; at least one mounting portion is installed on the shielding cover, and the shielding cover is fixed to the transformer housing through the mounting portion, and the transformer housing and the filter housing are installed on the electric control assembly housing.

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

[0017] In a second aspect, the present application provides a vehicle and includes the electric drive assembly described above. Effects of the invention

[0018] The present application provides an electric drive assembly and a vehicle, and relates to the field of new energy vehicles. The electric drive assembly comprises a motor assembly, an electric control assembly, and a cooling component; the electric control assembly is installed on the side of the motor assembly, and the cooling component is installed between the electric control assembly and the motor assembly; the motor assembly comprises a housing, a reduction gear, and a drive motor. The housing is installed surrounding 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, and the reduction gear is installed on the outside of the housing. The cooling component comprises a first cooling unit and a second cooling unit. The first cooling unit is installed between the electric control assembly and the motor assembly, and the second cooling unit is installed inside the receiving cavity. The first cooling unit and the second cooling unit each have a cooling passage sequentially connected to each other, and a cooling medium flows through both cooling passages to cool the electric drive assembly. The present application provides an electric drive assembly and a vehicle, thereby shortening the path of the cooling water channel and improving cooling efficiency.

[0019] The electric drive assembly and vehicle structure provided in this application, as well as other application purposes and advantageous effects, will be more clearly and easily understood through the description of preferred embodiments combined with the drawings. Other aspects will become clearly apparent after reading and understanding the drawings and the detailed description. Brief explanation of the drawing

[0020] FIG. 1 is a front view of an electric drive assembly provided in an embodiment of the present application. FIG. 2 is a left side view of an electric drive assembly provided in an embodiment of the present application. FIG. 3 is a front view of a drive motor in an electric drive assembly provided in an embodiment of the present application. FIG. 4 is a schematic diagram of the structure of a drive motor at one viewpoint in an electric drive assembly provided in an embodiment of the present application. FIG. 5 is a schematic diagram of the structure of a drive motor at a different perspective in an electric drive assembly provided in an embodiment of the present application. FIG. 6 is a schematic diagram of the housing of the motor assembly in the electric drive assembly provided in an embodiment of the present application. Figure 7 is a cross-sectional view of AA in Figure 6. FIG. 8 is a front view of a cooling component in an electric drive assembly provided in an embodiment of the present application. FIG. 8a is a schematic diagram of the structure of a first cooling unit in an electric drive assembly provided in an embodiment of the present application. FIG. 8b is a schematic diagram of the structure of a second cooling unit in an electric drive assembly provided in an embodiment of the present application. FIG. 9 is a plan view of a cooling component in an electric drive assembly provided in an embodiment of the present application. FIG. 10 is a schematic diagram of the structure of a resolver of an electric control assembly in an electric drive assembly provided in an embodiment of the present application. FIG. 11 is a schematic diagram of the structure of the filter and capacitor of the electric control assembly in the electric drive assembly provided in an embodiment of the present application. Specific details for implementing the invention

[0021] To make the purpose, technical solution, and advantages of the embodiments of this application clearer, the technical solution according to the embodiments of this application is described below in conjunction with the attached drawings. It is obvious that the described embodiments are only some embodiments of this application and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by a person skilled in the art without creative effort fall within the scope of protection of this application.

[0022] The electric drive assembly is a key component that determines performance characteristics such as vehicle power and energy consumption. Its role is to convert chemical energy into kinetic energy for electric vehicles, and as a drive system utilizing a motor as kinetic energy, it includes a motor controller, a motor, and a reduction gear.

[0023] Currently, in existing new energy vehicle electric drive assemblies, the motor, reduction gear, and motor controller are mostly separated into distinct structures with low integration density, resulting in low space utilization. Additionally, the cooling channels installed in typical electric drive assembly structures consist of two channels; that is, the cooling system for the motor stator and the cooling system for the electric control assembly are installed separately.

[0024] However, in these conventional electric drive assembly structures, the arrangement path of the cooling system water channels is long and the resistance to cooling water flow is relatively high, resulting in relatively low cooling efficiency.

[0025] To this end, the present application provides an electric drive assembly and a vehicle, and integrates a drive motor and a reduction gear into a motor assembly, and integrates a motor controller, a resolver, a vehicle-mounted charger, etc. into an electric control assembly, and connects the motor assembly and the electric control assembly through a fastening member, thereby improving the space utilization rate inside the electric drive assembly and reducing the weight of the electric drive assembly; and by using a design in which the electric control assembly and the motor assembly share a set of cooling systems, a cooling component is installed between the motor assembly and the electric control assembly so that when the coolant flows inside the cooling component, it can take away heat from the motor assembly and the electric control assembly, thereby shortening the path of the cooling water channel and reducing fluid resistance compared to the structure of a conventional electric drive assembly, and improving the cooling efficiency of the electric drive assembly.

[0026] The electric drive assembly of the present embodiment is further described below.

[0027] FIG. 1 is a front view of an electric drive assembly provided in an embodiment of the present application; FIG. 2 is a left side view of an electric drive assembly provided in an embodiment of the present application; FIG. 3 is a front view of a drive motor in an electric drive assembly provided in an embodiment of the present application; FIG. 4 is a schematic diagram of the structure of a drive motor in an electric drive assembly provided in an embodiment of the present application at one viewpoint; FIG. 5 is a schematic diagram of the structure of a drive motor in an electric drive assembly provided in an embodiment of the present application at another viewpoint; FIG. 6 is a schematic diagram of the housing of a motor assembly in an electric drive assembly provided in an embodiment of the present application; FIG. 7 is a cross-sectional view of AA in FIG. 6; FIG. 8 is a front view of a cooling component in an electric drive assembly provided in an embodiment of the present application; FIG. 8a is a schematic diagram of the structure of a first cooling unit in an electric drive assembly provided in an embodiment of the present application; FIG. 8b is a schematic diagram of the structure of a second cooling unit in an electric drive assembly provided in an embodiment of the present application; FIG. 9 is a top view of a cooling component in an electric drive assembly provided in an embodiment of the present application; FIG. 10 is a schematic diagram of the structure of a resolver of an electric control assembly in an electric drive assembly provided in an embodiment of the present application; FIG. 11 is a schematic diagram of the structure of a filter and a capacitor of an electric control assembly in an electric drive assembly provided in an embodiment of the present application.

[0028] As illustrated in FIGS. 1 to 3, an embodiment of the present application provides an electric drive assembly (10) comprising a motor assembly (100), an electric control assembly (200), and a cooling component (300); the electric control assembly (200) is installed on the side of the motor assembly (100), and the cooling component (300) is installed between the electric control assembly (200) and the motor assembly (100); the motor assembly (100) comprises a housing (110), a reduction gear (120), and a drive motor (130); A housing (110) is installed around the outside of a drive motor (130), and the housing (110) has a first housing part (113) and a second housing part (114) arranged sequentially from the inside to the outside with a gap between them, and a receiving cavity (115) that surrounds the outside of the drive motor (130) is formed between the first housing part (113) and the second housing part (114), and a reduction gear (120) is installed on the outside of the housing (110) and connected to the output terminal of the drive motor (130); The cooling component (300) includes a first cooling unit (310) and a second cooling unit (320), the first cooling unit (310) is installed between the electric control assembly (200) and the motor assembly (100), and the second cooling unit (320) is installed inside the receiving cavity (115), and the first cooling unit (310) and the second cooling unit (320) each have a cooling passage connected sequentially, and a cooling medium flows through the cooling passages of both the first cooling unit (310) and the second cooling unit (320) to cool the electric drive assembly (10).

[0029] Here, the cooling system of the present embodiment is a closed-loop forced-cycle water-cooling system, and controls the cooling process of the electric drive assembly (10) through the automotive thermal management system. Specifically, the coolant provided by the automotive thermal management system first enters the vehicle-mounted charger and DC-DC converter channel (370) through the cooling passage inlet (330) of the first cooling unit, takes away the heat generated through heat exchange, and at this time, the temperature of the coolant rises. Subsequently, the coolant enters the motor controller channel (380), takes away the heat generated from the motor controller through heat exchange, and at this time, the temperature of the coolant rises again. Then, the coolant flows into the second cooling unit (320) through the cooling passage inlet (350) of the second cooling unit, takes away the heat generated from the drive motor (130) through heat exchange via the housing (110), and at this time, the coolant flows back to the automotive thermal management system through the cooling passage outlet (360) of the second cooling unit, performs heat exchange in the thermal management system, and after the temperature is lowered, returns to the first cooling It flows into the cooling passage inlet (330) of the unit and completes one cooling cycle.

[0030] Here, the first cooling unit (310) includes a motor controller channel (380), a vehicle-mounted charger, and a DC-DC converter channel (370), and as shown in FIG. 9, the motor controller channel (380), the vehicle-mounted charger, and the DC-DC converter channel (350) are arranged in a straight line, and the second cooling unit (320) is arranged spirally below the motor controller channel (380), thereby shortening the path of the cooling channel and reducing the flow resistance of the coolant.

[0031] It needs to be explained that, in order to prevent the cooling liquid from freezing at low temperatures, water and ethylene glycol are mixed in a 1:1 ratio and used as the cooling liquid, so that the freezing point can be lowered to -40℃.

[0032] Thus, the drive motor (130) and the reduction gear (120) are integrated into the motor assembly (100), the motor controller, the resolver (220), the vehicle-mounted charger, etc. are integrated into the electric control assembly (200), and the motor assembly (100) and the electric control assembly (200) are connected through a fastening member (210) to improve the space utilization rate inside the electric drive assembly (10) and reduce the weight of the electric drive assembly (10); By using a design in which the electric control assembly (200) and the motor assembly (100) share a set of cooling systems, a cooling component (300) is installed between the motor assembly (100) and the electric control assembly (200), so that when the cooling liquid flows inside the cooling component (300), it can take away heat from the motor assembly (100) and the electric control assembly (200), thereby shortening the path of the cooling water and reducing fluid resistance compared to the existing electric drive assembly structure, and thus improving the cooling efficiency of the electric drive assembly.

[0033] In some embodiments, the cooling passage of the second cooling unit (320) forms a spiral shape and is wound around the outside of the drive motor (130). Specifically, the cooling passage on one side in contact with the drive motor (130) is flat. The purpose of this design is to increase the contact area with the second housing part (114), thereby improving heat conduction efficiency and ensuring uniform heat transfer.

[0034] In some embodiments, the housing (110) is provided with an inlet (111) and an outlet (112) communicating with a receiving cavity (115), the inlet (111) is connected to a cooling passage outlet (340) of a first cooling unit, and the outlet (112) is connected to a cooling passage outlet (360) of a second cooling unit.

[0035] Here, the cooling component (300) is fixed to the electric control assembly (200) via a strap, and specifically, the first cooling unit (310) is provided with a cooling passage inlet (330) and a cooling passage outlet (340) of the first cooling unit, and the second cooling unit (320) is provided with a cooling passage inlet (350) and a cooling passage outlet (360) of the second cooling unit, and as shown in FIG. 8a and FIG. 8b, the cooling passage outlet (340) of the first cooling unit and the cooling passage inlet (350) of the second cooling unit are connected via an interference fit method.

[0036] In some embodiments, the housing (110) further includes a separation portion (390), the separation portion (390) is connected between the first housing portion (113) and the second housing portion (114) to partition a mounting area within the receiving cavity (115), and the shape of the mounting area matches the shape of the cooling passage.

[0037] Here, the separation part (390) is provided with two types, a foldable type and a spiral type, and optionally, in this embodiment, the spiral separation part (390) is used to distribute to the second housing part (114), and as shown in FIG. 7, specifically, a certain gap is provided between two adjacent spiral tubes of the second cooling unit (320) to be snap-fitted with the separation part (390), thereby ensuring the connection stability of the second cooling unit (320).

[0038] In some embodiments, the electric control assembly (200) and the motor assembly (100) are installed in parallel in a vertical direction, and the electric control assembly (200) and the motor assembly (100) are connected through a fastening member (210).

[0039] Here, a mounting hole is installed around the electric control assembly (200), and a fastening member (210) passes through the mounting hole to detachably connect the electric control assembly (200) and the motor assembly (100). As shown in FIG. 4, the purpose of this design is to facilitate subsequent maintenance and replacement of internal parts of the electric control assembly (200) and the motor assembly (100). Specifically, the type of the fastening member (210) may be a bolt, a nut, or other form, and this embodiment is not limited thereto.

[0040] In some embodiments, the electric control assembly (200) includes a motor controller, a vehicle-mounted charger, and a DC-DC converter; the motor controller includes a resolver (220), a filter (270), and a capacitor (260), the resolver (220) is electrically connected to a drive motor (130), and the filter (270) and capacitor (260) are installed in parallel within a filter housing (250), as shown in FIG. 11.

[0041] Here, the capacitor (260) is mainly composed of a film capacitor and positive / negative output copper bars, and the filter (270) is composed of an input copper bar, two magnetic rings, and four safety capacitors, and the capacitor (260) and the filter (270) are filled and fixed with epoxy adhesive to serve as insulation and heat transfer. Specifically, the high-voltage DC current of the power battery passes through the input copper bar, is filtered by the filter (270), and then is connected to the output copper bar, and the film capacitor is connected in parallel between the positive / negative copper bars to smooth the bus voltage, and the positive / negative copper bars are arranged to overlap so as to eliminate stray inductance.

[0042] Here, the number of input interfaces of the filter (270) is two, and the input interfaces are connected to the power battery by connecting to a DC bus plug, serving as high-voltage inputs, and the number of output interfaces of the capacitor (260) is six, each connected to an input port of an Insulated-Gate Bipolar Transistor (IGBT) power module to provide high-voltage power to the IGBT.

[0043] Here, in order to reduce the weight of the electric control assembly (200), a motor controller, a vehicle-mounted charger, and a DC-DC converter are integrated as a single unit. Specifically, the vehicle-mounted charger and the DC-DC converter are installed adjacent to one end of the electric control assembly (200), and the vehicle-mounted charger is equipped with a slow charging interface to convert alternating current originating from the power grid into direct current to charge the electric vehicle battery. The DC-DC converter converts the high DC voltage within the vehicle battery into a low DC voltage to supply power to the vehicle-mounted power supply and the functional module on the electric circuit.

[0044] It should be added that the electric control assembly (200) further includes a Power Distribution Unit (PDU), electrically connects high-voltage components through a busbar and wire harness, and provides functions such as charging and discharging control, high-voltage component power supply control, circuit overload short-circuit protection, high-voltage sampling, and low-voltage control to the new energy vehicle high-voltage system, thereby protecting and monitoring the operation of the high-voltage system.

[0045] It should be added that the electric control assembly (200) further includes a vehicle controller (Vehicle control unit, VCU) to ensure that the vehicle operates normally and stably in a state of relatively excellent power, relatively high economy, and reliability by being responsible for normal driving of the vehicle, braking energy feedback, energy management of the vehicle drive system and power battery, network management, fault diagnosis and processing, and vehicle status monitoring.

[0046] Here, the resolver (220) is a position sensor that reflects the position, rotational speed, and rotational direction of the rotor of the drive motor (130), and the resolver (220) includes a stator and a rotor, specifically, the stator of the resolver (220) is mounted on the rear cover of the drive motor (130), and the rotor is mounted on the motor shaft and rotates together with the motor shaft.

[0047] In some embodiments, a plurality of input interfaces are installed in the motor controller, wherein the plurality of input interfaces are classified into DC bus high-voltage line interfaces and DC fast-charging high-voltage line interfaces, and the plurality of input interfaces are screw-type interfaces, and the purpose of such installation is to reduce costs and improve connection reliability by eliminating two plug sockets and a high-voltage interlock line structure in the quick-connect interface method.

[0048] In some embodiments, the resolver (220) includes a transformer body and a transformer housing (280) installed around the outside of the transformer body, and a shielding cover (230) is installed on the inner wall of the transformer housing (280); at least one mounting portion (240) is installed on the shielding cover (230), and the shielding cover (230) is fixed to the transformer housing (280) through the mounting portion (240), and the transformer housing (280) and the filter housing (250) are installed on an electric control assembly housing.

[0049] Here, as illustrated in FIG. 10, three mounting portions are installed along the circumferential direction of the shielding cover (230), and screw holes are installed within the mounting portions, and screws pass through the screw holes to stably mount the shielding cover (230) to the transformer housing (280). Specifically, the shape of the shielding cover (230) is rectangular so as to completely cover the resolver (220). The purpose of this design is to prevent electromagnetic radiation caused by the operation of the resolver (220), and at the same time, it may serve as a protective measure to prevent the resolver (220) from failing due to external interference.

[0050] Specifically, the material of the shielding cover (230) is stainless steel, and the purpose of installing it is that electronic components often need to operate in humid and highly corrosive environments, but stainless steel material has relatively strong corrosion resistance and a relatively long service life.

[0051] In some embodiments, the housing (110) further includes a front cover, the front cover is installed at one end of the drive motor (130), and the first housing part (113) and the second housing part (114) are both connected to the front cover;

[0052] An extension bracket is installed on the front cover, and the motor controller is installed on the extension bracket.

[0053] Here, the first housing part (113) and the front cover are molded as a single unit, and the second housing part (114) is installed to surround the first housing part (113). Specifically, the extension bracket has a mounting hole, and a bolt passes through the mounting hole to connect the motor controller to the bracket.

[0054] In some embodiments, as a vehicle, it includes the electric drive assembly (10) described above.

[0055] Here, the reduction gear (120) uses self-stirring oil splash cooling lubrication and dissipates heat by exchanging heat with air through the reduction gear housing, and specifically, the electric drive assembly (10) is applied to a small electric vehicle and also to an electric pickup truck.

[0056] In this embodiment, the electric drive assembly (10) includes a motor assembly (100), an electric control assembly (200), and a cooling component (300); the electric control assembly (200) is installed on the side of the motor assembly (100), and the cooling component (300) is installed between the electric control assembly (200) and the motor assembly (100); the motor assembly (100) includes a housing (110), a reduction gear (120), and a drive motor (130); A housing (110) is installed around the outside of a drive motor (130), and the housing (110) has a first housing part (113) and a second housing part (114) arranged sequentially from the inside to the outside with a gap between them, and a receiving cavity (115) that surrounds the outside of the drive motor (130) is formed between the first housing part (113) and the second housing part (114), and a reduction gear (120) is installed on the outside of the housing (110) and connected to the output terminal of the drive motor (130); The cooling component (300) includes a first cooling unit (310) and a second cooling unit (320), the first cooling unit (310) is installed between the electric control assembly (200) and the motor assembly (100), and the second cooling unit (320) is installed inside the receiving cavity (115), and the first cooling unit (310) and the second cooling unit (320) each have a cooling passage connected sequentially, and a cooling medium flows through the cooling passages of both the first cooling unit (310) and the second cooling unit (320) to cool the electric drive assembly (10).Thus, the drive motor (130) and the reduction gear (120) are integrated into the motor assembly (100), the motor controller, the resolver (220), the vehicle-mounted charger, etc. are integrated into the electric control assembly (200), and the motor assembly (100) and the electric control assembly (200) are connected through the fastening member (210), thereby improving the space utilization rate inside the electric drive assembly (10) and reducing the weight of the electric drive assembly (10); By using a design in which the electric control assembly (200) and the motor assembly (100) share a set of cooling systems, a cooling component (300) is installed between the motor assembly (100) and the electric control assembly (200), so that when the cooling liquid flows inside the cooling component (300), it can take away heat from the motor assembly (100) and the electric control assembly (200), thereby shortening the path of the cooling water and reducing fluid resistance compared to the existing electric drive assembly structure, and thus improving the cooling efficiency of the electric drive assembly.

[0057] In the embodiments of this application, terms such as “first,” “second,” etc., are used to distinguish similar objects and are not necessary to describe a specific order or sequence. It should be understood that the data used in this manner may be compatible where appropriate so that the embodiments of this application described herein may be practiced. Furthermore, the terms “include” and “comprising,” and any variations thereof, are intended to encompass inclusions that are not exclusive.

[0058] In the embodiments of the present application, orientations or positional relationships indicated by terms such as “up,” “down,” “inside,” “middle,” “outside,” “front,” “back,” etc., are based on orientations or positional relationships shown in the 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 necessarily have a specific orientation or to be configured and operated in a specific orientation. Furthermore, the aforementioned partial terms may indicate not only orientations or positional relationships but also other meanings; for example, the term “up” may indicate a specific dependency or connection relationship in specific cases. Those skilled in the art will be able to understand the specific meanings of these terms in the embodiments of the present application according to the specific circumstances.

[0059] Furthermore, the terms “installation,” “connection,” and “fixing” should be understood in a broad sense. For example, “connection” may be a fixed connection, a detachable connection, or an integral structure; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meaning of the terms described above in the embodiments of this disclosure depending on the specific circumstances.

[0060] It should be noted that embodiments referred to in the specification as “one embodiment,” “an embodiment,” “an exemplary embodiment,” “some embodiments,” etc., may include specific features, structures, or characteristics, but not all embodiments include such specific features, structures, or characteristics. Furthermore, these phrases do not necessarily imply the same embodiment. Additionally, when describing specific features, structures, or characteristics by combining embodiments, implementing such features, structures, or characteristics by combining them with other explicitly or implicitly described embodiments is within the knowledge of those skilled in the art.

[0061] Generally, terms should be understood at least in part based on their use within the context. For example, at least in part depending on the context, the term “one or plural” as used in a specification may be intended to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Similarly, at least in part depending on the context, a term such as “one” may be understood as a usage conveying the singular or a usage conveying the plural.

[0062] Finally, it must be noted that each of the above-described embodiments is merely for illustrating the technical solution of the present application and is not intended to limit it; although the present application has been described in detail with reference to each of the above-described embodiments, it should be understood by those skilled in the art that modifications may still be made to the technical solution described in each of the above-described embodiments, or equivalent substitutions may be made for some or all of the technical features; and such modifications or substitutions do not cause the essence of the corresponding technical solution to be outside the scope of the technical solution of each of the embodiments of the present application. Explanation of the symbols

[0063] 10: Electric drive assembly 100: Motor Assembly 110: Housing 111: Inlet 112: Outlet 113: 1st Housing Division 114: 2nd Housing Section 115: Receiving cavity 120: Reducer 130: Drive motor 200: Electrical control assembly 210: Fastening member 220: Resolver 230: Shielding cover 240: Mounting part 250: Filter housing 260: Capacitor 270: Filter 280: Transformer housing 300: Cooling component 310: 1st cooling unit 320: Second cooling unit 330: Inlet of the cooling passage of the first cooling unit 340: Cooling passage outlet of the first cooling unit 350: Cooling passage inlet of the second cooling unit 360: Cooling passage outlet of the second cooling unit 370: Vehicle-mounted charger and DC-DC converter channel 380: Motor controller channel 390: Separator

Claims

Claim 1 An electric drive assembly comprising a motor assembly, an electric control assembly, and a cooling component; wherein the electric control assembly is installed on the side of the motor assembly, and the cooling component is installed between the electric control assembly and the motor assembly; wherein the motor assembly comprises a housing, a reduction gear, and a drive motor; wherein the housing is installed surrounding the outside of the drive motor, and the housing has a first housing portion and a second housing portion arranged sequentially from the inside to the outside with a gap, and a receiving cavity is formed between the first housing portion and the second housing portion to surround the outside of the drive motor, and the reduction gear is installed on the outside of the housing and connected to the output terminal of the drive motor; The above cooling component includes a first cooling unit and a second cooling unit, wherein the first cooling unit is installed between the electric control assembly and the motor assembly and the second cooling unit is installed inside the receiving cavity, and the first cooling unit and the second cooling unit each have a cooling passage connected sequentially, and a cooling medium flows through the cooling passages of both the first cooling unit and the second cooling unit to cool the electric drive assembly. Claim 2 An electric drive assembly according to claim 1, wherein the cooling passage of the second cooling unit forms a spiral and is wound on the outer side of the drive motor. Claim 3 An electric drive assembly according to claim 1, wherein the housing is provided with an inlet and an outlet communicating with the receiving cavity, the inlet is connected to the cooling passage outlet of the first cooling unit, and the outlet is connected to the cooling passage outlet of the second cooling unit. Claim 4 In paragraph 3, the housing further comprises a separating portion, the separating portion is connected between the first housing portion and the second housing portion to separate a mounting area within the receiving cavity, and the shape of the mounting area matches the shape of the cooling passage, an electric drive assembly. Claim 5 An electric drive assembly according to any one of claims 1 to 4, wherein the electric control assembly and the motor assembly are installed in parallel in a vertical direction, and the electric control assembly and the motor assembly are connected through a fastening member. Claim 6 In claim 5, the electric control assembly comprises a motor controller, a vehicle-mounted charger, and a DC-DC converter; the motor controller comprises a resolver, a filter, and a capacitor, the resolver is electrically connected to the drive motor, and the filter and the capacitor are installed in parallel within a filter housing, an electric drive assembly. Claim 7 In claim 6, the motor controller is equipped with a plurality of input interfaces, and the plurality of input interfaces are screw-type interfaces, an electric drive assembly. Claim 8 In claim 6, the resolver comprises a transformer body and a transformer housing installed around the outside of the transformer body, and a shielding cover is installed on the inner wall of the transformer housing; at least one mounting portion is installed on the shielding cover, and the shielding cover is fixed to the transformer housing through the mounting portion, and the transformer housing and the filter housing are installed on an electric control assembly housing, an electric drive assembly. Claim 9 An electric drive assembly according to any one of claims 1 to 4, wherein the housing further comprises a front cover, the front cover is installed at one end of the drive motor, and both the first housing portion and the second housing portion are connected to the front cover; an extension bracket is installed on the front cover, and the motor controller is installed on the extension bracket. Claim 10 A vehicle comprising an electric drive assembly according to any one of claims 1 to 9.

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