Motor controller, electric drive apparatus, electric drive system, and electric device

Abstract

The present application provides a motor controller (11), an electric drive apparatus (10), an electric drive system (100), and an electric device. The motor controller (11) comprises a first control assembly (111), a second control assembly (112), and a cooling assembly (113); the first control assembly (111) is electrically connected to a first motor (12); the second control assembly (112) is electrically connected to a second motor (13); the cooling assembly (113) is used for cooling the first control assembly (111) and the second control assembly (112); and the first control assembly (111), the cooling assembly (113), and the second control assembly (112) are successively stacked.

Description

Motor controllers, electric drive devices, electric drive systems and electric equipment

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202321975117.2 filed on July 25, 2023, entitled “Motor controller, electric drive device, electric drive system and electric equipment”, which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application belongs to the field of electric drive technology, and more specifically, relates to a motor controller, an electric drive device, an electric drive system and an electric device. Background Art

[0004] With increasing environmental pollution, new energy vehicles are gaining popularity. Electric drive units, as the power source of new energy vehicles, convert the electrical energy provided by the battery into mechanical energy to propel the vehicle. Electric drive units typically include a motor and a motor controller, which controls the motor's operation. However, due to the numerous components and complex structure of motor controllers, simplifying assembly and maintaining a compact structure has become a pressing challenge in this field.

[0005] Summary of the Invention

[0006] The purpose of the embodiments of the present application is to provide a motor controller, an electric drive device, an electric drive system and an electric device to solve the technical problem of complex motor controller structure in related technologies.

[0007] To achieve the above objectives, the technical solution adopted in the embodiment of the present application is to provide a motor controller, comprising:

[0008] a first control assembly electrically connected to the first motor;

[0009] a second control component electrically connected to the second motor;

[0010] The cooling component is used to cool the first control component and the second control component. The first control component, the cooling component and the second control component are stacked in sequence.

[0011] The motor controller provided by the embodiment of the present application has at least the following beneficial effects: the motor controller provided by the embodiment of the present application effectively reduces the number of components of the motor controller by stacking the first control component, the cooling component and the second control component in sequence, so that the first control component and the second control component can share a cooling component. Moreover, compared with the method of dispersing multiple control components, the method of stacking the first control component, the cooling component and the second control component in sequence can make the structure of the motor controller more compact, thereby effectively reducing the volume of the motor controller, and further effectively reducing the volume of the electric drive device using the motor controller.

[0012] In some embodiments of the present application, the motor controller is disposed between the first motor and the second motor.

[0013] By adopting the above technical solution, the space between the first motor and the second motor can be effectively utilized, thereby further reducing the volume of the electric drive device.

[0014] In some embodiments of the present application, the first control component, the cooling component and the second control component are stacked in sequence along a first direction, and the first direction is a direction perpendicular to the central axis of the first motor and the central axis of the second motor.

[0015] By adopting the above technical solution, the thickness direction of the whole formed by the stacking of the first control component, the cooling component and the second control component corresponds to the depth direction of the space between the first motor and the second motor, and the width direction or length direction of the whole formed by the stacking of the first control component, the cooling component and the second control component corresponds to the width direction of the space between the first motor and the second motor. In this way, the space between the first motor and the second motor can be more effectively utilized, thereby further reducing the volume of the electric drive device.

[0016] In some embodiments of the present application, the motor controller also includes a capacitor electrically connected to the first control component and the second control component, and a DC input component electrically connected to the capacitor. The first control component, the second control component and the cooling component are arranged on one side of the capacitor, and the DC input component is arranged on the side of the capacitor facing away from the first control component, the second control component and the cooling component.

[0017] By adopting the above technical solution, the whole formed by the stacking of the first control component, the cooling component and the second control component, the capacitor and the DC input component are arranged in sequence along one direction, making the structure of the motor controller more compact, thereby further reducing the volume of the motor controller and the volume of the electric drive device. At the same time, by arranging the capacitor between the whole formed by the stacking of the first control component, the cooling component and the second control component and the DC input component, the magnetic interference of the DC input component on the first control component and the second control component is effectively improved, thereby effectively improving the reliability of the motor controller.

[0018] In some embodiments of the present application, the first control component, the second control component and the cooling component are arranged on one side of the capacitor along the second direction, and the DC input component is arranged on the other side of the capacitor along the second direction, and the second direction is a direction perpendicular to the first direction, the central axis of the first motor and the central axis of the second motor.

[0019] By adopting the above technical solution, the motor controller is roughly in the form of a rectangular structure, thereby making the structure of the motor controller more compact and further reducing the volume of the motor controller. At the same time, the width direction of the motor controller corresponds to the width direction of the space between the first motor and the second motor. In this way, the space between the first motor and the second motor can be more effectively utilized, thereby further reducing the volume of the electric drive device.

[0020] In some embodiments of the present application, the motor controller also includes a first electrical connector, a first AC output terminal is provided on the side of the first control component facing away from the capacitor, one end of the first electrical connector is electrically connected to the first AC output terminal, and the other end of the first electrical connector extends from the first AC output terminal to the side of the first control component facing the first motor and is electrically connected to the AC input terminal of the first motor; and / or, the motor controller also includes a second electrical connector, a second AC output terminal is provided on the side of the second control component facing away from the capacitor, one end of the second electrical connector is electrically connected to the second AC output terminal, and the other end of the second electrical connector extends from the second AC output terminal to the side of the second control component facing the second motor and is electrically connected to the AC input terminal of the second motor.

[0021] By adopting the above technical solution, the layout design of the DC-AC conversion circuit of the first control module is facilitated, while the AC power transmission path between the first control component and the first motor can be effectively shortened, thereby further reducing the size of the motor controller. Similarly, the layout design of the DC-AC conversion circuit of the second control module is facilitated, while the AC power transmission path between the second control component and the second motor can be effectively shortened, thereby further reducing the size of the motor controller.

[0022] In some embodiments of the present application, the motor controller also includes a first sampling harness, a first sampling terminal is provided on the side of the first control component facing the first motor, one end of the first sampling harness is electrically connected to the first sampling terminal, and the other end of the first sampling harness is electrically connected to the sampling terminal of the first motor; and / or, the motor controller also includes a second sampling harness, a second sampling terminal is provided on the side of the second control component facing the second motor, one end of the second sampling harness is electrically connected to the second sampling terminal, and the other end of the second sampling harness is electrically connected to the sampling terminal of the second motor.

[0023] By adopting the above technical solution, the sampling path between the first control component and the first motor is effectively shortened, thereby further reducing the size of the motor controller. Similarly, the sampling path between the second control component and the second motor is effectively shortened, thereby further reducing the size of the motor controller.

[0024] In some embodiments of the present application, the motor controller also includes a housing, a capacitor electrically connected to the first control component and the second control component, and a DC input component electrically connected to the capacitor. The first control component, the second control component, the cooling component, the capacitor and the DC input component are housed in the housing.

[0025] By adopting the above technical solution, the first control component, the second control component, the cooling component, the capacitor and the DC input component are effectively protected.

[0026] In some embodiments of the present application, the first control component, the second control component, the cooling component, the capacitor and the DC input component are connected and integrated into one.

[0027] By adopting the above technical solution, the first control component, the second control component, the cooling component, the capacitor and the DC input component can be connected into a whole and then assembled into a box, thereby effectively improving the assembly efficiency of the motor controller.

[0028] In some embodiments of the present application, the motor controller also includes a first electrical connector and a second electrical connector, one end of the first electrical connector is electrically connected to the first control component, and the other end of the first electrical connector is detachably connected to the AC input terminal of the first motor, one end of the second electrical connector is electrically connected to the second control component, and the other end of the second electrical connector is detachably connected to the AC input terminal of the second motor, the inner wall of the box is provided with a liquid inlet connector, a liquid outlet connector and a DC input terminal, the cooling component includes a liquid inlet pipe detachably connected to the liquid inlet connector and a liquid outlet pipe detachably connected to the liquid outlet connector, and the DC input component includes a third electrical connector detachably connected to the DC input terminal.

[0029] By adopting the above technical solution, when the motor controller needs to be repaired, the first electrical connector can be disconnected from the AC input terminal of the first motor, the second electrical connector can be disconnected from the AC input terminal of the second motor, the liquid inlet pipe can be disconnected from the liquid inlet joint, the liquid outlet pipe can be disconnected from the liquid outlet joint, and the third electrical connector can be disconnected from the DC input terminal. Subsequently, the entirety formed by the first control component, the second control component, the cooling component, the capacitor and the DC input component can be removed from the casing so that one or more of the first control component, the second control component, the cooling component, the capacitor and the DC input component can be repaired.

[0030] In some embodiments of the present application, the first control component includes a first power module and a first control module, the second control component includes a second power module and a second control module, and the first control module, the first power module, the cooling component, the second power module and the second control module are stacked in sequence.

[0031] By adopting the above technical solution, the structure of the motor controller can be made more compact, thereby effectively reducing the volume of the motor controller, and further effectively reducing the volume of the electric drive device using the motor controller.

[0032] In some embodiments of the present application, the cooling assembly includes a liquid cooling plate, and a cooling channel is provided inside the liquid cooling plate; the first power module includes a first power body and a first heat conductor, and the first heat conductor is arranged on the side of the first power body facing the liquid cooling plate and inserted into the cooling channel; and / or, the second power module includes a second power body and a second heat conductor, and the second heat conductor is arranged on the side of the second power body facing the liquid cooling plate and inserted into the cooling channel.

[0033] By adopting the above technical solution, the heat generated by the operation of the first power body can be transferred to the cooling medium in the cooling channel through the first heat conductor, thereby effectively improving the efficiency of the cooling component in cooling the first power module. At the same time, by inserting the first heat conductor into the cooling channel, the thickness of the entire stack formed by the first control component, the cooling component, and the second control component can be effectively reduced, so that the structure of the motor controller becomes more compact, further reducing the volume of the motor controller. Similarly, the heat generated by the operation of the second power body can be transferred to the cooling medium in the cooling channel through the second heat conductor, thereby effectively improving the efficiency of the cooling component in cooling the second power module. At the same time, by inserting the second heat conductor into the cooling channel, the thickness of the entire stack formed by the first control component, the cooling component, and the second control component can be effectively reduced, so that the structure of the motor controller becomes more compact, further reducing the volume of the motor controller.

[0034] In some embodiments of the present application, the first control module includes a first circuit board, which is provided with a first drive circuit and a first control circuit; and / or the second control module includes a second circuit board, which is provided with a second drive circuit and a second control circuit.

[0035] By adopting the above technical solution, the integration of the motor controller is effectively improved, thereby further reducing the size of the motor controller.

[0036] An embodiment of the present application also provides an electric drive device, including a first motor, a second motor and the motor controller described in any of the above embodiments, wherein the first control component is electrically connected to the first motor, and the second control component is electrically connected to the second motor.

[0037] The electric drive device provided by the embodiments of the present application has at least the following beneficial effects: the electric drive device provided by the embodiments of the present application adopts the motor controller described in any of the above embodiments, thereby effectively reducing the volume of the electric drive device.

[0038] An embodiment of the present application also provides an electric drive device, including a first motor, a second motor, a speed changing mechanism and the motor controller described in the above embodiment, the first control component is electrically connected to the first motor, the second control component is electrically connected to the second motor, and the motor controller and the speed changing mechanism are arranged along a third direction, which is a direction perpendicular to the central axis of the first motor and the central axis of the second motor.

[0039] The electric drive device provided by the embodiment of the present application has at least the following beneficial effects: the electric drive device provided by the embodiment of the present application adopts the motor controller described in the above embodiment, thereby effectively reducing the volume of the electric drive device.

[0040] In some embodiments of the present application, the first direction and the third direction are the same.

[0041] By adopting the above technical solution, the stacking direction of the first control component, the cooling component and the second control component is made the same as the distribution direction of the motor controller and the speed change mechanism, so that the thickness direction of the whole formed by the stacking of the first control component, the cooling component and the second control component is consistent with the length direction of the electric drive device, thereby effectively reducing the length of the electric drive device and further reducing the volume of the electric drive device.

[0042] An embodiment of the present application also provides an electric drive device, including a first motor, a second motor, a speed shifting mechanism and the motor controller described in the above embodiment, the first control component is electrically connected to the first motor, the second control component is electrically connected to the second motor, the speed shifting mechanism includes a first shell and a speed shifting component accommodated in the first shell, and the first shell and the box body are an integrally formed part.

[0043] The electric drive device provided by the embodiment of the present application has at least the following beneficial effects: the electric drive device provided by the embodiment of the present application adopts the motor controller described in the above embodiment, thereby effectively reducing the volume of the electric drive device.

[0044] An embodiment of the present application further provides an electric drive system, comprising a battery and the electric drive device described in any one of the above embodiments, wherein the battery is electrically connected to the electric drive device.

[0045] The electric drive system provided by the embodiments of the present application has at least the following beneficial effects: the electric drive system provided by the embodiments of the present application effectively reduces the volume of the electric drive system because it adopts the electric drive device described in any of the above embodiments.

[0046] An embodiment of the present application also provides an electric device, including the above-mentioned electric drive system.

[0047] The electric device provided by the embodiments of the present application has at least the following beneficial effects: the electric device provided by the embodiments of the present application effectively reduces the volume of the electric device because it adopts the electric drive system described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0050] FIG2 is a schematic diagram of an exploded structure of a battery provided in an embodiment of the present application;

[0051] FIG3 is a schematic structural diagram of an electric drive device provided in an embodiment of the present application;

[0052] FIG4 is a schematic diagram of the rear view of the electric drive device shown in FIG3 with the cover of the motor controller removed;

[0053] FIG5 is a schematic structural diagram of the motor controller in the electric drive device shown in FIG4 without the box, the cover, the first sampling harness, and the second sampling harness;

[0054] FIG6 is a right side structural schematic diagram of the motor controller shown in FIG5 with the first electrical connector, the second electrical connector, and the liquid inlet and outlet pipes of the cooling assembly removed;

[0055] FIG7 is a schematic structural diagram of a first control component in the motor controller shown in FIG6 ;

[0056] FIG8 is a schematic structural diagram of a second control component in the motor controller shown in FIG6 .

[0057] Among them, the reference numerals in the figures are:

[0058] 1000. Vehicle;

[0059] 100. Electric drive system;

[0060] 10. Electric drive device; 11. Motor controller; 111. First control assembly; 1111. First control module; 1112. First power module; 11121. First power main body; 11122. First heat conducting member; 112. Second control assembly; 1121. Second control module; 1122. Second power module; 11221. Second power main body; 11222. Second heat conducting member; 113. Cooling assembly; 1131. Liquid cooling plate; 1132. Liquid inlet pipe 1133, liquid outlet pipe; 114, capacitor; 115, DC input assembly; 1151, third electrical connector; 1152, EMC filter; 116a, first electrical connector; 116b, second electrical connector; 117a, first sampling harness; 117b, second sampling harness; 118, housing; 1181, liquid inlet connector; 1182, liquid outlet connector; 1183, DC input terminal; 12, first motor; 13, second motor; 14, speed change mechanism;

[0061] 20. Battery;

[0062] 21. Battery box; 211. First part; 212. Second part;

[0063] 22. Battery cells;

[0064] 200. Vehicle body. DETAILED DESCRIPTION

[0065] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0066] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0067] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0068] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature identified as "first," "second," or "third" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0069] An electric drive unit can serve as the power unit of a new energy vehicle, converting the electrical energy provided by the battery into mechanical energy to drive the vehicle. Currently, electric drive units include centralized and distributed electric drive units. Centralized electric drive units transmit the motor's output torque to the left and right wheels of a new energy vehicle via a transmission mechanism to drive the vehicle. Distributed electric drive units typically include at least two motors, each of which transmits its output torque to a single wheel to drive the vehicle. In other words, distributed electric drive units can independently control individual wheels of a new energy vehicle. Therefore, compared to new energy vehicles using centralized electric drive units, new energy vehicles using distributed electric drive units have better functionality and maneuverability, making distributed electric drive units increasingly popular with automakers.

[0070] In the related art, a distributed electric drive device typically also includes a motor controller, which includes at least two control components and at least two cooling components. Each control component is electrically connected to a motor to control the operation of the corresponding motor, and each cooling component is thermally connected to a control component to cool the corresponding control component. However, since each control component requires a corresponding cooling component to cool it, this results in a large number of cooling components, and the cooling components are large in size, which in turn increases the size of the motor controller. In addition, in order to facilitate the electrical connection of the control components to the corresponding motors, the control components are usually located in a position close to the corresponding motors. This results in the installation positions of the various control components being too dispersed, thereby further increasing the size of the motor controller, and thus significantly increasing the size of the electric drive device.

[0071] In order to reduce the volume of the motor controller, an embodiment of the present application provides a motor controller, in which the first control component, the cooling component and the second control component of the motor controller are stacked in sequence, so that the first control component and the second control component can share a cooling component, effectively reducing the number of components of the motor controller. Moreover, compared with the method of dispersing multiple control components, the method of stacking the first control component, the cooling component and the second control component in sequence can make the structure of the motor controller more compact, thereby effectively reducing the volume of the motor controller, and further effectively reducing the volume of the electric drive device using the motor controller.

[0072] The electric drive device provided in the embodiments of the present application can be applied to electric equipment, which may be but is not limited to vehicles, ships, airplanes, spacecraft, excavators, cranes, lifts, elevators, etc., and is not specifically limited here.

[0073] For the convenience of description, the following embodiments are described by taking the electric device of one embodiment of the present application as a vehicle as an example.

[0074] Please refer to Figure 1, which is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of the present application. Based on the power source, vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle. Based on the drive mode, vehicle 1000 can be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle. Vehicle 1000 includes a vehicle body 200 and an electric drive system 100.

[0075] The vehicle body 200 is the primary supporting component of the vehicle 1000. It comprises an engine compartment and a passenger compartment. The engine compartment houses the vehicle 1000's powertrain, electronic control system, transmission mechanism, and other components, while the passenger compartment provides operating and seating space for the driver and passengers. When the vehicle 1000 is a front-wheel drive vehicle, the engine compartment is located at the front of the vehicle body 200, forming the front engine compartment. When the vehicle 1000 is a rear-wheel drive vehicle, the engine compartment is located at the rear of the vehicle body 200, forming the rear engine compartment. When the vehicle 1000 is a four-wheel drive vehicle, the engine compartment is divided into a front engine compartment and a rear engine compartment, with the front engine compartment located at the front of the vehicle body 200 and the rear engine compartment located at the rear. The passenger compartment is located between the front and rear sections of the vehicle body 200.

[0076] The electric drive system 100 is the power system of the vehicle 1000. The electric drive system 100 is used to convert electrical energy into mechanical energy and output this mechanical energy to the wheels of the vehicle 1000 to drive the vehicle 1000. The electric drive system 100 is installed on the vehicle body 200. Specifically, a portion of the electric drive system 100 can be installed in the engine compartment, and another portion of the electric drive system 100 can be installed on the bottom of the vehicle body 200.

[0077] Referring to FIG. 1 , an electric drive system 100 provided in an embodiment of the present application includes a battery 20 and an electric drive device 10 .

[0078] The battery 20 is used to provide electrical energy to the electric drive device 10, and the battery 20 can be set at the bottom, head or tail of the vehicle 1000. Please refer to Figure 2, which is an exploded schematic diagram of the battery 20 provided in an embodiment of the present application. The battery 20 includes a battery box 21 and a battery cell 22, and the battery cell 22 is accommodated in the battery box 21. Among them, the battery box 21 is used to provide a storage space for the battery cell 22, and the battery box 21 can adopt a variety of structures. In some embodiments, the battery box 21 may include a first part 211 and a second part 212, the first part 211 and the second part 212 cover each other, and the first part 211 and the second part 212 jointly define a storage space for accommodating the battery cell 22. The second portion 212 can be a hollow structure with one end open, and the first portion 211 can be a plate-like structure. The first portion 211 covers the open side of the second portion 212, so that the first portion 211 and the second portion 212 jointly define a storage space. The first portion 211 and the second portion 212 can also be hollow structures with one end open, and the open side of the first portion 211 covers the open side of the second portion 212, so that the first portion 211 and the second portion 212 jointly define a storage space. Of course, the battery box 21 formed by the first portion 211 and the second portion 212 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc., which are not specifically limited here.

[0079] In some embodiments, the battery box 21 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the battery box 21 may form at least a portion of the floor of the vehicle 1000, or a portion of the battery box 21 may form at least a portion of the cross member and longitudinal member of the vehicle 1000.

[0080] Of course, in some embodiments, the battery 20 may not include a battery box 21 , but rather a plurality of battery cells 22 may be electrically connected and formed into a whole through necessary fixing structures before being assembled into the vehicle 1000 .

[0081] In the battery 20, there may be multiple battery cells 22, and the multiple battery cells 22 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to the multiple battery cells 22 being connected both in series and in parallel. The multiple battery cells 22 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery 22 may be housed within the battery case 21. Of course, the battery 20 may also be a battery module formed by first connecting multiple battery cells 22 in series, in parallel, or in a hybrid connection, and then the multiple battery modules are further connected in series, in parallel, or in a hybrid connection to form an entire battery 22, which is then housed within the battery case 21. The battery 20 may also include other functional components, such as a busbar for electrically connecting the multiple battery cells 22.

[0082] Each battery cell 22 may be a secondary battery or a primary battery. A secondary battery refers to a battery cell 22 that can be recharged to activate the active material after the battery cell 22 is discharged and can continue to be used. A primary battery refers to a battery cell 22 that cannot be recharged to activate the active material after the battery cell 22's power is exhausted and can continue to be used. The battery cell 22 may also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., but is not limited thereto. The battery cell 22 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell 22 of another shape. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic batteries. Polygonal prismatic batteries, for example, hexagonal prismatic batteries, are not particularly limited in this application.

[0083] The electric drive device 10 is used to convert the electrical energy provided by the battery 20 into mechanical energy and output the mechanical energy to the wheels of the vehicle 1000 to drive the vehicle 1000. The electric drive device 10 is installed in the engine compartment. Specifically, when the vehicle 1000 is a front-wheel drive vehicle, the electric drive device 10 is installed in the front engine compartment and is used to output the mechanical energy to the front wheels of the vehicle 1000 to drive the vehicle 1000. When the vehicle 1000 is a rear-wheel drive vehicle, the electric drive device 10 is installed in the rear engine compartment and is used to output the mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000. When the vehicle 1000 is a four-wheel drive vehicle, there are two electric drive devices 10: one electric drive device 10 is installed in the front engine compartment and is used to output the mechanical energy to the front wheels of the vehicle 1000, and the other electric drive device 10 is installed in the rear engine compartment and is used to output the mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000.

[0084] Referring to Figure 3 , the electric drive device 10 includes a first motor 12, a second motor 13, and a motor controller 11. The first motor 12 and the second motor 13 are configured to convert electrical energy provided by a battery 20 into mechanical energy. During operation of the electric drive device 10, the rotational speeds of the first motor 12 and the second motor 13 can be the same, or they can be different. The rotational axes of the first motor 12 and the second motor 13 are parallel. The first motor 12 and the second motor 13 can be coaxial, i.e., the central axis of the first motor 12 and the central axis of the second motor 13 coincide. Alternatively, the first motor 12 and the second motor 13 can be coaxial, i.e., the central axis of the first motor 12 and the central axis of the second motor 13 are spaced apart in any direction perpendicular to the central axis of the first motor 12. The "central axis" of a motor refers to the axial centerline of the motor's rotational shaft (or "rotor shaft"). Optionally, the first motor 12 can be an axial flux motor, a radial flux motor, a servo motor, a brushed motor, a brushless motor, etc., which is not specifically limited here; similarly, the second motor 13 can be an axial flux motor, a radial flux motor, a servo motor, a brushed motor, a brushless motor, etc., which is not specifically limited here.

[0085] The motor controller 11 is used to convert the direct current output by the battery 20 into alternating current and transmit the alternating current to the first motor 12 and the second motor 13, and is also used to control the operation of the first motor 12 and the second motor 13. For example, the motor controller 11 is used to control the start and stop, speed, torque, etc. of the first motor 12 and the second motor 13; of course, the alternating current generated by the rotation of the first motor 12 and the second motor 13 can also be rectified into direct current and transmitted to the battery 20, which is the kinetic energy recovery function commonly referred to. In other words, the first motor 12, the second motor 13 and the battery 20 are electrically connected to the motor controller 11. The direct current output by the battery 20 can be transmitted to the motor controller 11 through the electrical connection path between the battery 20 and the motor controller 11. After the motor controller 11 converts the direct current into alternating current, the alternating current can be transmitted to the first motor 12 and the second motor 13 through the electrical connection path between the motor controller 11 and the first motor 12 and the electrical connection path between the motor controller 11 and the second motor 13, so as to drive the first motor 12 and the second motor 13 to operate. At the same time, the control signal of the motor controller 11 can be transmitted to the first motor 12 and the second motor 13 through the electrical connection path between the motor controller 11 and the first motor 12 and the electrical connection path between the motor controller 11 and the second motor 13. The operating status signal of the first motor 12 can be transmitted to the motor controller 11 through the electrical connection path between the motor controller 11 and the first motor 12, and the operating status signal of the second motor 13 can be transmitted to the motor controller 11 through the electrical connection path between the motor controller 11 and the second motor 13, so as to enable the motor controller 11 to control the operation of the first motor 12 and the second motor 13.

[0086] The electric drive device 10 may further include a transmission mechanism 14. The transmission mechanism 14 is configured to transmit the mechanical energy to the wheels of the vehicle 1000 by changing the speed and torque of the first motor 12 and the speed and torque of the second motor 13. For example, the transmission mechanism 14 transmits the mechanical energy to the wheels of the vehicle 1000 by reducing the speed of the first motor 12 and the second motor 13 and increasing the torque of the first motor 12 and the second motor 13. For another example, the transmission mechanism 14 transmits the mechanical energy to the wheels of the vehicle 1000 by increasing the speed of the first motor 12 and the second motor 13 and reducing the torque of the first motor 12 and the second motor 13. Additionally, the transmission mechanism 14 may be configured to change the direction of the output shaft of the electric drive device 10 relative to the output shafts of the first motor 12 and the second motor 13. For example, a bevel gear or worm gear structure may be used to connect the output shafts of the first motor 12 and the second motor 13 to further change the direction of the torque output. Optionally, the speed change mechanism 14 may be, but is not limited to, a pinion speed change mechanism, a worm speed change mechanism, a planetary gear speed change mechanism, a continuously variable speed change mechanism, etc., and is not specifically limited here.

[0087] The electric drive device 10 provided in an embodiment of the present application is described below with reference to the accompanying drawings.

[0088] First, referring to Figures 4 to 8 , embodiments of the present application provide a motor controller 11 comprising a first control assembly 111, a second control assembly 112, and a cooling assembly 113. The first control assembly 111 is electrically connected to the first motor 12. The second control assembly 112 is electrically connected to the second motor 13. The cooling assembly 113 is configured to cool the first control assembly 111 and the second control assembly 112. The first control assembly 111, the cooling assembly 113, and the second control assembly 112 are stacked in this order.

[0089] The first control component 111 is used to convert the direct current output by the battery 20 into alternating current and transmit the alternating current to the first motor 12, and is also used to control the operation of the first motor 12. For example, the first control component 111 is used to control the start and stop, speed, torque, etc. of the first motor 12. In other words, the first motor 12 and the battery 20 are electrically connected to the first control component 111. For example, the motor controller 11 also includes a first electrical connector 116a and a first sampling harness 117a. One end of the first electrical connector 116a is connected to the first AC output terminal (not shown) of the first control component 111, and the other end of the first electrical connector 116a is connected to the AC input terminal (not shown) of the first motor 12. The direct current output by the battery 20 can be transmitted to the first control component 111 through the electrical connection path between the battery 20 and the first control component 111. After the first control component 111 converts the direct current into alternating current, the alternating current Electricity can be delivered to the first motor 12 via the first electrical connector 116a to drive the first motor 12. At the same time, one end of the first sampling harness 117a is connected to the first sampling terminal (not shown) of the first control assembly 111, and the other end of the first sampling harness 117a is connected to the sampling terminal (not shown) of the first motor 12. Control signals from the first control assembly 111 can be transmitted to the first motor 12 via the first sampling harness 117a, and operating status signals of the first motor 12 can also be transmitted to the first control assembly 111 via the first sampling harness 117a, enabling the first control assembly 111 to control the operation of the first motor 12. Optionally, the material of the first electrical connector 116a can be, but is not limited to, copper, aluminum, iron, etc., and is not specifically limited herein.

[0090] The second control component 112 is used to convert the direct current output by the battery 20 into alternating current and transmit the alternating current to the second motor 13, and is also used to control the operation of the second motor 13. For example, the second control component 112 is used to control the start and stop, speed, torque, etc. of the second motor 13. In other words, the second motor 13 and the battery 20 are electrically connected to the second control component 112. For example, the motor controller 11 also includes a second electrical connector 116b and a second sampling harness 117b. One end of the second electrical connector 116b is connected to the second AC output terminal (not shown) of the second control component 112, and the other end of the second electrical connector 116b is connected to the AC input terminal (not shown) of the second motor 13. The direct current output by the battery 20 can be transmitted to the second control component 112 through the electrical connection path between the battery 20 and the second control component 112. After the second control component 112 converts the direct current into alternating current, the alternating current Electricity can be delivered to the second motor 13 via the second electrical connector 116b to drive the second motor 13. At the same time, one end of the second sampling harness 117b is connected to the second sampling terminal (not shown) of the second control assembly 112, and the other end of the second sampling harness 117b is connected to the sampling terminal (not shown) of the second motor 13. The control signal of the second control assembly 112 can be transmitted to the second motor 13 via the second sampling harness 117b. The operating status signal of the second motor 13 can also be transmitted to the second control assembly 112 via the second sampling harness 117b, enabling the second control assembly 112 to control the operation of the second motor 13. Optionally, the material of the second electrical connector 116b can be, but is not limited to, copper, aluminum, iron, etc., and is not specifically limited herein.

[0091] Cooling assembly 113 is a component used to cool first control assembly 111 and second control assembly 112. It is understood that the heat-generating portions of first control assembly 111 and second control assembly 112 are in contact with cooling assembly 113. Heat generated by these portions is transferred to cooling assembly 113, thereby cooling first control assembly 111 and second control assembly 112. Cooling assembly 113 can optionally be, but is not limited to, a liquid cooling assembly, an air cooling assembly, a metal conduction cooling assembly, and the like, and is not specifically limited here.

[0092] In some embodiments, the first control component 111, the second control component 112 and the cooling component 113 are roughly plate-shaped structures, and the first control component 111, the cooling component 113 and the second control component 112 are stacked in sequence, which means that: the plate surface of the first control component 111, the plate surface of the second control component 112 and the plate surface of the cooling component 113 are roughly parallel, and any plane parallel to the plate surface of the first control component 111 is used as a reference plane. In the direction perpendicular to the plate surface of the first control component 111 (for example, the X direction shown in Figure 6), the projection of the first control component 111 on the reference plane, the projection of the second control component 112 on the reference plane, and the projection of the cooling component 113 on the reference plane at least partially overlap.

[0093] The motor controller 11 provided in the embodiment of the present application is configured such that the first control component 111, the cooling component 113 and the second control component 112 are stacked in sequence, and the first control component 111 and the second control component 112 are located on both sides of the cooling component 113, so that the first control component 111 and the second control component 112 can share a cooling component 113, thereby effectively reducing the number of components of the motor controller 11. Moreover, compared with the method of dispersing multiple control components, the method of stacking the first control component 111, the cooling component 113 and the second control component 112 in sequence can make the structure of the motor controller 11 more compact, thereby effectively reducing the volume of the motor controller 11, and further effectively reducing the volume of the electric drive device 10 using the motor controller 11.

[0094] In some embodiments of the present application, referring to FIG. 4 , the motor controller 11 is disposed between the first motor 12 and the second motor 13 .

[0095] It can be understood that the first motor 12 and the second motor 13 are arranged relative to each other in a direction parallel to the central axis of the first motor 12 and are separated to form a layout space, and the motor controller 11 is arranged in the layout space. The motor controller 11 can be arranged in the layout space in its entirety or in its entirety. In this embodiment, the above-mentioned first control component 111, the second control component 112 and the cooling component 113, as well as the capacitor 114 and the DC input component 115 described below are arranged in the layout space.

[0096] By adopting the above technical solution, the space between the first motor 12 and the second motor 13 can be effectively utilized, thereby further reducing the volume of the electric drive device 10.

[0097] In some embodiments of the present application, please refer to Figures 3 and 6 together. The first control component 111, the cooling component 113, and the second control component 112 are stacked in sequence along a first direction. The first direction is a direction perpendicular to the central axis of the first motor 12 and the central axis of the second motor 13. For example, the first direction is the X direction shown in Figures 3 and 6.

[0098] By adopting the above-mentioned technical solution, the thickness direction (for example, the X direction shown in Figures 3 and 6) of the whole formed by stacking the first control component 111, the cooling component 113 and the second control component 112 corresponds to the depth direction of the space between the first motor 12 and the second motor 13, and the width direction (for example, the Y direction shown in Figures 3 to 5) or the length direction (for example, the Z direction shown in Figures 3 to 6) of the whole formed by stacking the first control component 111, the cooling component 113 and the second control component 112 corresponds to the width direction of the space between the first motor 12 and the second motor 13. In this way, the space between the first motor 12 and the second motor 13 can be more effectively utilized, thereby further reducing the volume of the electric drive device 10.

[0099] In some embodiments of the present application, please refer to Figures 4 to 6 together. The motor controller 11 also includes a capacitor 114 electrically connected to the first control component 111 and the second control component 112, and a DC input component 115 electrically connected to the capacitor 114. The first control component 111, the second control component 112 and the cooling component 113 are arranged on one side of the capacitor 114, and the DC input component 115 is arranged on the side of the capacitor 114 facing away from the first control component 111, the second control component 112 and the cooling component 113.

[0100] Capacitor 114 is used to smooth the voltage of DC input component 115, thereby keeping voltage fluctuations on DC input component 115 within an allowable range and reducing the adverse effects of voltage overshoot and transient overvoltage from DC input component 115 on first control component 111 and second control component 112. In some embodiments, capacitor 114 has a first terminal (not shown) and a second terminal (not shown). DC input component 115 is electrically connected to the first terminal, and first control component 111 and second control component 112 are electrically connected to the second terminal. Optionally, capacitor 114 may be, but is not limited to, a film capacitor, an electrolytic capacitor, an electric double-layer capacitor, etc., and is not specifically limited here.

[0101] The DC input component 115 is used to electrically connect to the battery 20 to transmit the DC power provided by the battery 20 to the capacitor 114. Specifically, the DC input component 115 may include a third electrical connector 1151, one end of the third electrical connector 1151 is electrically connected to the battery 20, and the other end of the third electrical connector 1151 is connected to the first terminal of the capacitor 114. Optionally, the material of the third electrical connector 1151 may be, but is not limited to, copper, aluminum, iron, etc., and is not specifically limited here. The DC input component 115 may also include an EMC (Electromagnetic Compatibility) filter 1152, which is provided on the third electrical connector 1151 and is used to reduce or eliminate the interference caused by the electromagnetic waves generated when the third electrical connector 1151 is energized on the first control component 111, the second control component 112, and the capacitor 114. Optionally, the EMC filter 1152 may be, but is not limited to, a ferrite tube, a ferrite magnetic ring, a magnetic ring choke, etc., which is not specifically limited here.

[0102] First control assembly 111, second control assembly 112, and cooling assembly 113 are disposed on one side of capacitor 114, and DC input assembly 115 is disposed on the side of capacitor 114 facing away from first control assembly 111, second control assembly 112, and cooling assembly 113. In other words, capacitor 114 is disposed between the DC input assembly 115 and the entire stacked assembly formed by first control assembly 111, cooling assembly 113, and second control assembly 112.

[0103] By adopting the above technical solution, the whole formed by the stacking of the first control component 111, the cooling component 113 and the second control component 112, the capacitor 114 and the DC input component 115 are arranged in sequence along one direction, so that the structure of the motor controller 11 becomes more compact, thereby further reducing the volume of the motor controller 11 and the volume of the electric drive device 10. At the same time, by arranging the capacitor 114 between the whole formed by the stacking of the first control component 111, the cooling component 113 and the second control component 112 and the DC input component 115, the magnetic interference of the DC input component 115 on the first control component 111 and the second control component 112 is effectively improved, thereby effectively improving the reliability of the motor controller 11.

[0104] In some embodiments of the present application, please refer to Figures 3 to 6 together. The first control component 111, the second control component 112 and the cooling component 113 are arranged on one side of the capacitor 114 along the second direction, and the DC input component 115 is arranged on the other side of the capacitor 114 along the second direction. The second direction is a direction perpendicular to the first direction, the central axis of the first motor 12 and the central axis of the second motor 13. For example, the second direction is the Z direction shown in Figures 4 to 5.

[0105] In other words, the whole formed by the stacking of the first control component 111, the cooling component 113 and the second control component 112, the capacitor 114 and the DC input component 115 are arranged in sequence along the second direction, so that the motor controller 11 is roughly a rectangular structure, thereby making the structure of the motor controller 11 more compact, further reducing the volume of the motor controller 11. At the same time, since the first direction is perpendicular to the central axis of the first motor 12 and the central axis of the second motor 13, and the second direction is perpendicular to the first direction, the central axis of the first motor 12 and the central axis of the second motor 13, the width direction of the motor controller 11 (for example, the Y direction shown in Figures 3 to 5) corresponds to the width direction of the space between the first motor 12 and the second motor 13. In this way, the space between the first motor 12 and the second motor 13 can be more effectively utilized, thereby further reducing the volume of the electric drive device 10.

[0106] In some embodiments of the present application, please refer to Figures 4 and 5 together. The above-mentioned first AC output terminal is arranged on the side of the first control component 111 facing away from the capacitor 114, one end of the first electrical connector 116a is electrically connected to the first AC output terminal, and the other end of the first electrical connector 116a extends from the first AC output terminal to the side of the first control component 111 facing the first motor 12 and is electrically connected to the AC input terminal of the first motor 12.

[0107] By adopting the above technical solution, it is convenient to layout the DC-AC conversion circuit of the first control module 1111, and at the same time, the AC power transmission path between the first control component 111 and the first motor 12 can be effectively shortened, thereby further reducing the volume of the motor controller 11.

[0108] In some embodiments of the present application, please refer to Figures 4 and 5 together. The second AC output terminal is arranged on the side of the second control component 112 facing away from the capacitor 114, and one end of the second electrical connector 116b is electrically connected to the second AC output terminal. The other end of the second electrical connector 116b extends from the second AC output terminal to the side of the second control component 112 facing the second motor 13 and is electrically connected to the AC input terminal of the second motor 13.

[0109] By adopting the above technical solution, it is convenient to layout the DC-AC conversion circuit of the second control module 1121, and at the same time, the AC power transmission path between the second control component 112 and the second motor 13 can be effectively shortened, thereby further reducing the volume of the motor controller 11.

[0110] In some embodiments of the present application, please refer to Figures 4 and 5 together. The above-mentioned first AC output terminal is arranged on the side of the first control component 111 facing away from the capacitor 114, one end of the first electrical connector 116a is electrically connected to the first AC output terminal, and the other end of the first electrical connector 116a extends from the first AC output terminal to the side of the first control component 111 facing the first motor 12 and is electrically connected to the AC input terminal of the first motor 12. The second AC output terminal is arranged on the side of the second control component 112 facing away from the capacitor 114, one end of the second electrical connector 116b is electrically connected to the second AC output terminal, and the other end of the second electrical connector 116b extends from the second AC output terminal to the side of the second control component 112 facing the second motor 13 and is electrically connected to the AC input terminal of the second motor 13.

[0111] By adopting the above technical solution, it is convenient to layout and design the DC-AC conversion circuit of the first control module 1111 and the DC-AC conversion circuit of the second control module 1121. At the same time, it can effectively shorten the AC power transmission path between the first control component 111 and the first motor 12 and the AC power transmission path between the second control component 112 and the second motor 13, thereby further reducing the volume of the motor controller 11.

[0112] In some embodiments of the present application, referring to FIG. 4 , the first sampling terminal is disposed on a side of the first control component 111 facing the first motor 12 .

[0113] By adopting the above technical solution, the sampling path between the first control component 111 and the first motor 12 is effectively shortened, thereby further reducing the size of the motor controller 11.

[0114] In some embodiments of the present application, referring to FIG. 4 , the second sampling terminal is disposed on a side of the second control component 112 facing the second motor 13 .

[0115] By adopting the above technical solution, the sampling path between the second control component 112 and the second motor 13 is effectively shortened, thereby further reducing the size of the motor controller 11.

[0116] In some embodiments of the present application, referring to FIG. 4 , the first sampling terminal is disposed on a side of the first control component 111 facing the first motor 12 , and the second sampling terminal is disposed on a side of the second control component 112 facing the second motor 13 .

[0117] By adopting the above technical solution, the sampling path between the first control component 111 and the first motor 12 and the sampling path between the second control component 112 and the second motor 13 are effectively shortened, thereby further reducing the size of the motor controller 11.

[0118] In some embodiments of the present application, referring to FIG. 4 , the motor controller 11 further includes a housing 118 , in which the first control component 111 , the second control component 112 , the cooling component 113 , the capacitor 114 and the DC input component 115 are housed.

[0119] The housing 118 is a component that provides an internal mounting environment for the motor controller 11. The housing 118 can be a one-piece component or an assembled component composed of multiple parts. The material of the housing 118 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited here.

[0120] In some embodiments, the motor controller 11 may further include a cover (not shown) that is positioned over the open side of the housing 118 to isolate the internal installation environment from the external environment. The cover may be integrally connected to the housing 118, for example, by welding the cover and the housing 118 together after the cover is positioned over the housing 118. The cover may also be detachably connected to the housing 118, for example, by fasteners such as bolts or rivets. The material of the cover may be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited herein.

[0121] By adopting the above technical solution, the first control component 111, the second control component 112, the cooling component 113, the capacitor 114 and the DC input component 115 are effectively protected.

[0122] In some embodiments of the present application, the first control component 111 , the second control component 112 , the cooling component 113 , the capacitor 114 and the DC input component 115 are connected and integrated into one.

[0123] The connection method of the first control component 111, the second control component 112, the cooling component 113, the capacitor 114 and the DC input component 115 can be, but is not limited to, a fastening connection method, a bonding method, a welding method, etc. For example, the first control component 111, the cooling component 113 and the second control component 112 are stacked in sequence and connected into a whole using fasteners, and then the whole, the capacitor 114 and the DC input component 115 are connected into a whole in sequence using fasteners.

[0124] By adopting the above technical solution, the first control component 111, the second control component 112, the cooling component 113, the capacitor 114 and the DC input component 115 can be connected into a whole and then assembled into the box 118, thereby effectively improving the assembly efficiency of the motor controller 11.

[0125] In some embodiments of the present application, referring to Figure 4, the first electrical connector 116a is detachably connected to the AC input terminal of the first motor 12, the second electrical connector 116b is detachably connected to the AC input terminal of the second motor 13, the inner wall of the box body 118 is provided with a liquid inlet connector 1181, a liquid outlet connector 1182 and a DC input terminal 1183, the cooling assembly 113 includes a liquid inlet pipe 1132 detachably connected to the liquid inlet connector 1181 and a liquid outlet pipe 1133 detachably connected to the liquid outlet connector 1182, and the third electrical connector 1151 is detachably connected to the DC input terminal 1183.

[0126] In this embodiment, the cooling component 113 is a liquid cooling component, and the cooling component 113 further includes a liquid cooling plate 1131. A cooling channel (not shown) is provided inside the liquid cooling plate 1131. One end of the liquid inlet pipe 1132 is connected to the inlet of the cooling channel, and the other end of the liquid inlet pipe 1132 is detachably connected to the liquid inlet joint 1181. One end of the liquid outlet pipe 1133 is connected to the outlet of the cooling channel, and the other end of the liquid outlet pipe 1133 is detachably connected to the liquid outlet joint 1182. It can be understood that the liquid inlet joint 1181 is connected to the cooling medium container, and the liquid outlet joint 1181 is connected to the cooling medium container. The head 1182 can be connected to the cooling medium container so that the cooling medium can flow back into the cooling medium container. The liquid outlet joint 1182 can also be connected to other external containers to collect the cooling medium. The cooling medium flows from the cooling medium container through the liquid inlet joint 1181, the liquid inlet pipe 1132, the cooling channel, the liquid outlet pipe 1133 and the liquid outlet joint 1182 in sequence to take away the heat generated by the first control component 111 and the heat generated by the second control component 112, thereby achieving the purpose of cooling the first control component 111 and the second control component 112.

[0127] The DC input terminal 1183 is used to electrically connect the motor controller 11 to the battery 20. The DC power output by the battery 20 is input into the motor controller 11 through the DC input terminal 1183, and is sequentially transmitted to the first control component 111 and the second control component 112 through the third electrical connector 1151 and the capacitor 114.

[0128] Removable connection means that after two components are connected, they can be re-detached without damaging the components. The aforementioned removable connection methods may include, but are not limited to, fastening connections, snap-fit ​​connections, plug-in connections, and the like, and are not specifically limited here. For example, the first electrical connector 116a is connected to the AC input terminal of the first motor 12 using fasteners such as bolts and screws. To detach the first electrical connector 116a from the AC input terminal of the first motor 12, the fasteners can be loosened and the first electrical connector 116a can be removed from the AC input terminal of the first motor 12.

[0129] By adopting the above technical solution, when the motor controller 11 needs to be repaired, the first electrical connector 116a can be disconnected from the AC input terminal of the first motor 12, the second electrical connector 116b can be disconnected from the AC input terminal of the second motor 13, the liquid inlet pipe 1132 can be disconnected from the liquid inlet joint 1181, the liquid outlet pipe 1133 can be disconnected from the liquid outlet joint 1182, and the third electrical connector 1151 can be disconnected from the DC input terminal 1183. Subsequently, the entirety formed by the first control component 111, the second control component 112, the cooling component 113, the capacitor 114 and the DC input component 115 can be removed from the box 118 so that one or more of the first control component 111, the second control component 112, the cooling component 113, the capacitor 114 and the DC input component 115 can be repaired.

[0130] In some embodiments of the present application, referring to FIG6 , the first control component 111 includes a first power module 1112 and a first control module 1111, the second control component 112 includes a second power module 1122 and a second control module 1121, and the first control module 1111, the first power module 1112, the cooling component 113, the second power module 1122 and the second control module 1121 are stacked in sequence.

[0131] The first control module 1111 is a core control component of the motor controller 11 , and is used to control the operation of the first motor 12 .

[0132] The first power module 1112 is a component for converting the direct current provided by the battery 20 into alternating current for driving the first motor 12. Optionally, the first power module 1112 may be, but is not limited to, a silicon carbide power module, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) power module, an IGBT (Insulated Gate Bipolar Transistor) power module, etc., and is not specifically limited herein.

[0133] The second control module 1121 is a core control component of the motor controller 11 , and is used to control the operation of the second motor 13 .

[0134] The second power module 1122 is a component for converting the direct current provided by the battery 20 into alternating current for driving the second motor 13. Optionally, the second power module 1122 can be, but is not limited to, a silicon carbide power module, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) power module, an IGBT (Insulated Gate Bipolar Transistor) power module, etc., and is not specifically limited here.

[0135] By adopting the above technical solution, the structure of the motor controller 11 can be made more compact, thereby effectively reducing the volume of the motor controller 11 and further effectively reducing the volume of the electric drive device 10 using the motor controller 11.

[0136] In some embodiments of the present application, please refer to Figures 6 and 7 together. The cooling assembly 113 includes a liquid cooling plate 1131, and a cooling channel is provided inside the liquid cooling plate 1131. The first power module 1112 includes a first power body 11121 and a first heat conductor 11122. The first heat conductor 11122 is arranged on the side of the first power body 11121 facing the liquid cooling plate 1131 and is inserted into the cooling channel.

[0137] The first power body 11121 is the main component of the first power module 1112 , and is used to convert the direct current provided by the battery 20 into alternating current for driving the first motor 12 to operate.

[0138] The first heat conductor 11122 is a heat dissipation component of the first power module 1112. The first heat conductor 11122 is disposed on the heat-generating portion of the first power body 11121 to transfer the heat generated by the heat-generating portion of the first power body 11121 to the liquid cooling plate 1131. It is understood that the first heat conductor 11122 is made of a heat-conducting material, which may be, but is not limited to, aluminum, aluminum alloy, copper, iron, steel, etc., and is not specifically limited here. The first heat conductor 11122 being inserted into the cooling channel means that at least a portion of the first heat conductor 11122 is placed in the cooling channel and in contact with the cooling medium in the cooling channel, so that the heat on the first heat conductor 11122 can be directly transferred to the cooling medium.

[0139] In some embodiments, the number of first power bodies 11121 can be multiple, and the multiple first power bodies 11121 are arranged in a direction parallel to the plate surface of the liquid cooling plate 1131. Correspondingly, the number of first heat conductors 11122 is also multiple, and the multiple first heat conductors 11122 are arranged in a one-to-one correspondence with the multiple first power bodies 11121.

[0140] In some embodiments, the first heat conductor 11122 includes multiple first heat conductors, which are arranged in an array structure on the heat-generating part of the first power body 11121 and inserted into the cooling channel to increase the heat conduction area of ​​the first heat conductor 11122, thereby effectively improving the cooling efficiency of the first control component 111.

[0141] In some embodiments, in order to reduce the risk of leakage of the cooling medium, a first sealing structure is provided between the first heat conducting member 11122 and the liquid cooling plate 1131 .

[0142] By adopting the above technical solution, the heat generated by the operation of the first power body 11121 can be transferred to the cooling medium in the cooling channel through the first heat conductor 11122, thereby effectively improving the efficiency of the cooling component 113 in cooling the first power module 1112. At the same time, by inserting the first heat conductor 11122 into the cooling channel, the overall thickness formed by the stacking of the first control component 111, the cooling component 113 and the second control component 112 can be effectively reduced, so that the structure of the motor controller 11 becomes more compact, and the volume of the motor controller 11 is further reduced.

[0143] In some embodiments of the present application, please refer to Figures 6 and 8. The second power module 1122 includes a second power body 11221 and a second heat conductor 11222. The second heat conductor 11222 is arranged on the side of the second power body 11221 facing the liquid cooling plate 1131 and is inserted into the cooling channel.

[0144] The second power body 11221 is the main component of the second power module 1122 , and is used to convert the direct current provided by the battery 20 into alternating current for driving the second motor 13 to operate.

[0145] The second heat conductor 11222 is a heat dissipation component of the second power module 1122. The second heat conductor 11222 is arranged on the heat-generating portion of the second power body 11221 to transfer the heat generated by the heat-generating portion of the second power body 11221 to the liquid cooling plate 1131. It is understandable that the second heat conductor 11222 is made of a heat-conducting material, which can be, but is not limited to, aluminum, aluminum alloy, copper, iron, steel, etc., and is not specifically limited here. The second heat conductor 11222 is inserted into the cooling channel, which means that at least a portion of the second heat conductor 11222 is placed in the cooling channel and contacts the cooling medium in the cooling channel, so that the heat on the second heat conductor 11222 can be directly transferred to the cooling medium.

[0146] In some embodiments, the number of second power bodies 11221 can be multiple, and the multiple second power bodies 11221 are arranged in a direction parallel to the plate surface of the liquid cooling plate 1131. Correspondingly, the number of second heat conductors 11222 is also multiple, and the multiple second heat conductors 11222 are arranged in a one-to-one correspondence with the multiple second power bodies 11221.

[0147] In some embodiments, the second heat-conducting member 11222 includes a plurality of second heat-conducting parts, which are arranged in an array structure on the heat-generating part of the second power body 11221 and inserted into the cooling channel to increase the heat-conducting area of ​​the second heat-conducting member 11222, thereby effectively improving the cooling efficiency of the second control component 112.

[0148] In some embodiments, in order to reduce the risk of leakage of the cooling medium, a second sealing structure is provided between the second heat conducting member 11222 and the liquid cooling plate 1131 .

[0149] By adopting the above-mentioned technical solution, the heat generated by the operation of the second power body 11221 can be transferred to the cooling medium in the cooling channel through the second heat conductor 11222, thereby effectively improving the efficiency of the cooling component 113 in cooling the second power module 1122. At the same time, by plugging the second heat conductor 11222 into the cooling channel, the overall thickness formed by the stacking of the first control component 111, the cooling component 113 and the second control component 112 can be effectively reduced, so that the structure of the motor controller 11 becomes more compact, and the volume of the motor controller 11 is further reduced.

[0150] In some embodiments of the present application, please refer to Figures 6 and 8 together. The cooling assembly 113 includes a liquid cooling plate 1131, and a cooling channel is provided inside the liquid cooling plate 1131. The first power module 1112 includes a first power body 11121 and a first heat conductor 11122. The first heat conductor 11122 is arranged on the side of the first power body 11121 facing the liquid cooling plate 1131 and is inserted into the cooling channel. The second power module 1122 includes a second power body 11221 and a second heat conductor 11222. The second heat conductor 11222 is arranged on the side of the second power body 11221 facing the liquid cooling plate 1131 and is inserted into the cooling channel.

[0151] By inserting the first heat conductor 11122 and the second heat conductor 11222 into the cooling channel, the thickness of the whole formed by the stacking of the first control component 111, the cooling component 113 and the second control component 112 can be effectively reduced, so that the structure of the motor controller 11 becomes more compact and the volume of the motor controller 11 is further reduced.

[0152] In some embodiments of the present application, the first control module 1111 includes a first circuit board, which is provided with a first driving circuit (not shown in the figure) and a first control circuit (not shown in the figure).

[0153] The first circuit board is a carrier of various electronic components in the first control module 1111 and is used to provide electrical connection lines between various electronic components.

[0154] The first driving circuit is a component collection structure used to control, drive and protect the normal operation of the first power module 1112. For example, the first driving circuit may include an IGBT high-voltage device driving unit, a memory chip unit, a power supply unit, etc.

[0155] The first control circuit is a component collection structure used to control the operation of the first motor 12. For example, the first control circuit may include a main chip unit, a power chip unit, a communication unit, a decoder unit, a storage chip unit, a temperature acquisition unit, a signal amplification unit, a PWM output unit, etc.

[0156] By integrating the first drive circuit and the first control circuit on the first circuit board, the integration level of the motor controller 11 is effectively improved, thereby further reducing the size of the motor controller 11.

[0157] In some embodiments of the present application, the second control module 1121 includes a second circuit board, and the second circuit board is provided with a second driving circuit (not shown in the figure) and a second control circuit (not shown in the figure).

[0158] The second circuit board is a carrier of the various electronic components in the second control module 1121 and is used to provide electrical connection lines between the various electronic components.

[0159] The second driving circuit is a component collection structure used to control, drive and protect the normal operation of the second power module 1122. For example, the second driving circuit may include an IGBT high-voltage device driving unit, a memory chip unit, a power supply unit, etc.

[0160] The second control circuit is a component collection structure for controlling the operation of the second motor 13. For example, the second control circuit may include a main chip unit, a power chip unit, a communication unit, a decoder unit, a storage chip unit, a temperature acquisition unit, a signal amplification unit, a PWM output unit, etc.

[0161] By integrating the second drive circuit and the second control circuit on the second circuit board, the integration level of the motor controller 11 is effectively improved, thereby further reducing the size of the motor controller 11.

[0162] In some embodiments of the present application, the first control module 1111 includes a first circuit board, which is provided with a first drive circuit and a first control circuit, and the second control module 1121 includes a second circuit board, which is provided with a second drive circuit and a second control circuit.

[0163] By integrating the first drive circuit and the first control circuit on the first circuit board and integrating the second drive circuit and the second control circuit on the second circuit board, the integration level of the motor controller 11 is effectively improved, thereby further reducing the size of the motor controller 11.

[0164] On the second aspect, please refer to Figures 3 and 4 together. An embodiment of the present application provides an electric drive device 10, including a first motor 12, a second motor 13 and the motor controller 11 described in any of the above embodiments, the first control component 111 is electrically connected to the first motor 12, and the second control component 112 is electrically connected to the second motor 13.

[0165] The electric drive device 10 provided in the embodiment of the present application adopts the motor controller 11 described in any of the above embodiments, thereby effectively reducing the volume of the electric drive device 10.

[0166] In some embodiments of the present application, referring to FIG3 , the motor controller 11 and the speed change mechanism 14 are arranged along a third direction, which is a direction perpendicular to the central axis of the first motor 12 and the central axis of the second motor 13 , for example, the third direction is the X direction shown in FIG3 .

[0167] By adopting the above technical solution, the structure of the electric drive device 10 can be made more compact, thereby effectively reducing the volume of the electric drive device 10.

[0168] In some embodiments of the present application, please refer to FIG. 3 and FIG. 6 , the first direction and the third direction are the same, for example, the first direction and the third direction are both the X direction shown in FIG. 3 and FIG. 6 .

[0169] By adopting the above technical solution, the stacking direction of the first control component 111, the cooling component 113 and the second control component 112 is made the same as the distribution direction of the motor controller 11 and the speed change mechanism 14, so that the thickness direction of the whole formed by the stacking of the first control component 111, the cooling component 113 and the second control component 112 is consistent with the length direction of the electric drive device 10 (for example, the X direction shown in Figure 3), thereby effectively reducing the length of the electric drive device 10 and further reducing the volume of the electric drive device 10.

[0170] In some embodiments of the present application, the speed shift mechanism 14 includes a first housing and a speed shift assembly accommodated in the first housing, and the first housing and the case 118 are integrally formed.

[0171] The first housing is a component that provides an internal mounting environment for the transmission mechanism 14. The material of the first housing can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc., and is not specifically limited here. In this embodiment, the first housing and the housing 118 are integrally formed. That is, the first housing is made of the same material as the housing 118, and the first housing and the housing 118 are manufactured as a single unit using an integral molding process. The integral molding process can be, but is not limited to, die-casting or casting, and is not specifically limited here.

[0172] In some embodiments, the first motor 12 includes a second shell, and the second motor 13 includes a third shell. The second shell and the third shell are respectively arranged on opposite sides of the first shell. For example, the second shell and the third shell are respectively arranged on opposite sides of the first shell along the Y direction shown in Figure 3.

[0173] By adopting the above technical solution, the volume of the electric drive device 10 is effectively reduced.

[0174] In a third aspect, referring to FIG. 1 , an embodiment of the present application provides an electric drive system 100 , including a battery 20 and the electric drive device 10 described in any one of the above embodiments, wherein the battery 20 is electrically connected to the electric drive device 10 .

[0175] The electric drive system 100 provided in the embodiment of the present application adopts the electric drive device 10 described in any of the above embodiments, thereby effectively reducing the volume of the electric drive system 100.

[0176] In the fourth aspect, please refer to FIG1 . An embodiment of the present application provides an electric device, including the above-mentioned electric drive system 100 .

[0177] The electric device provided in the embodiment of the present application adopts the electric drive system 100 described in any of the above embodiments, thereby effectively reducing the size of the electric device.

[0178] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A motor controller, characterized in that: The motor controller comprises: A first control component electrically connected to the first motor; A second control component is electrically connected to the second motor; A cooling component is used to cool the first control component and the second control component. The first control component, the cooling component and the second control component are stacked in sequence.

2. The motor controller according to claim 1, characterized in that: The motor controller is disposed between the first motor and the second motor.

3. The motor controller according to claim 2, characterized in that: The first control component, the cooling component and the second control component are stacked in sequence along a first direction, and the first direction is a direction perpendicular to the central axis of the first motor and the central axis of the second motor.

4. The motor controller according to claim 3, characterized in that: The motor controller also includes a capacitor electrically connected to the first control component and the second control component, and a DC input component electrically connected to the capacitor. The first control component, the second control component and the cooling component are arranged on one side of the capacitor, and the DC input component is arranged on a side of the capacitor that is away from the first control component, the second control component and the cooling component.

5. The motor controller according to claim 4, characterized in that: The first control component, the second control component and the cooling component are arranged on one side of the capacitor along a second direction, and the DC input component is arranged on the other side of the capacitor along the second direction, and the second direction is a direction perpendicular to the first direction, the central axis of the first motor and the central axis of the second motor.

6. The motor controller according to claim 5, characterized in that: The motor controller further comprises a first electrical connector, a first AC output terminal is provided on a side of the first control component facing away from the capacitor, one end of the first electrical connector is electrically connected to the first AC output terminal, and the other end of the first electrical connector extends from the first AC output terminal to a side of the first control component facing the first motor and is electrically connected to an AC input terminal of the first motor; and / or, The motor controller also includes a second electrical connector, a second AC output terminal is provided on the side of the second control component facing away from the capacitor, one end of the second electrical connector is electrically connected to the second AC output terminal, and the other end of the second electrical connector extends from the second AC output terminal to the side of the second control component facing the second motor and is electrically connected to the AC input terminal of the second motor.

7. The motor controller according to claim 5 or 6, characterized in that: The motor controller further includes a first sampling harness, a first sampling terminal is provided on a side of the first control component facing the first motor, one end of the first sampling harness is electrically connected to the first sampling terminal, and the other end of the first sampling harness is electrically connected to the sampling terminal of the first motor; and / or, The motor controller also includes a second sampling harness, a second sampling terminal is provided on the side of the second control component facing the second motor, one end of the second sampling harness is electrically connected to the second sampling terminal, and the other end of the second sampling harness is electrically connected to the sampling terminal of the second motor.

8. The motor controller according to claim 1, characterized in that: The motor controller also includes a housing, a capacitor electrically connected to the first control component and the second control component, and a DC input component electrically connected to the capacitor, and the first control component, the second control component, the cooling component, the capacitor and the DC input component are accommodated in the housing.

9. The motor controller according to claim 8, characterized in that: The first control component, the second control component, the cooling component, the capacitor and the DC input component are connected and integrated into one.

10. The motor controller according to claim 9, characterized in that: The motor controller also includes a first electrical connector and a second electrical connector, one end of the first electrical connector is electrically connected to the first control component, and the other end of the first electrical connector is detachably connected to the AC input terminal of the first motor, one end of the second electrical connector is electrically connected to the second control component, and the other end of the second electrical connector is detachably connected to the AC input terminal of the second motor, the inner wall of the box is provided with a liquid inlet connector, a liquid outlet connector and a DC input terminal, the cooling component includes a liquid inlet pipe detachably connected to the liquid inlet connector and a liquid outlet pipe detachably connected to the liquid outlet connector, and the DC input component includes a third electrical connector detachably connected to the DC input terminal.

11. The motor controller according to any one of claims 1 to 10, characterized in that: The first control component includes a first power module and a first control module, the second control component includes a second power module and a second control module, and the first control module, the first power module, the cooling component, the second power module and the second control module are stacked in sequence.

12. The motor controller according to claim 11, characterized in that: The cooling assembly comprises a liquid cooling plate, wherein a cooling channel is provided inside the liquid cooling plate; The first power module comprises a first power body and a first heat conducting member, wherein the first heat conducting member is arranged on a side of the first power body facing the liquid cooling plate and is plugged into the cooling channel; and / or, The second power module includes a second power body and a second heat conducting member. The second heat conducting member is disposed on a side of the second power body facing the liquid cooling plate and is plugged into the cooling channel.

13. The motor controller according to claim 11 or 12, characterized in that: The first control module includes a first circuit board, the first circuit board is provided with a first drive circuit and a first control circuit; and / or, The second control module includes a second circuit board, and the second circuit board is provided with a second driving circuit and a second control circuit.

14. An electric drive device, characterized in that: The electric drive device includes a first motor, a second motor and a motor controller as described in any one of claims 1 to 13, the first control component is electrically connected to the first motor, and the second control component is electrically connected to the second motor.

15. An electric drive device, characterized in that: The electric drive device includes a first motor, a second motor, a speed change mechanism and a motor controller as described in any one of claims 3 to 7, the first control component is electrically connected to the first motor, the second control component is electrically connected to the second motor, the motor controller and the speed change mechanism are arranged along a third direction, and the third direction is a direction perpendicular to the central axis of the first motor and the central axis of the second motor.

16. The electric drive device according to claim 15, characterized in that: The first direction and the third direction are the same.

17. An electric drive device, characterized in that: The electric drive device includes a first motor, a second motor, a speed shifting mechanism and a motor controller as described in any one of claims 8 to 10, the first control component is electrically connected to the first motor, the second control component is electrically connected to the second motor, the speed shifting mechanism includes a first shell and a speed shifting component accommodated in the first shell, and the first shell and the housing are integrally formed.

18. An electric drive system, characterized in that: The electric drive system comprises a battery and an electric drive device as claimed in any one of claims 14 to 17, and the battery is electrically connected to the electric drive device.

19. An electric device, characterized in that: The electric device comprises the electric drive system according to claim 18.

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