Dual-motor power assembly and electric vehicle

Abstract

The embodiment of the invention provides a dual-motor power assembly and an electric vehicle, a main shell of the dual-motor power assembly comprises a middle shell, two speed reducers are arranged on the two sides of the middle shell in the axial direction of the dual-motor power assembly, and the middle shell comprises two side faces and a peripheral face. The two side faces respectively comprise two speed reducer containing grooves, and groove openings of the two speed reducer containing grooves are opposite in the axial direction of the dual-motor power assembly. The peripheral surface comprises the accommodating groove, and the concave direction of the accommodating groove faces the gap between the two speed reducers, so that the intermediate shell can fully utilize the gap between the two speed reducers to form the accommodating groove, and the space in the accommodating groove is used for accommodating part of electrical components, so that the space for arranging the electrical components outside the total shell can be saved; the overall size of the dual-motor power assembly can be reduced, and therefore the layout of the dual-motor power assembly in a whole vehicle can be optimized.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a dual-motor powertrain and an electric vehicle. Background Art

[0002] The dual-motor drive technology can use two drive motors to independently control the left and right wheels to achieve high-precision torque vector output. Each drive motor has a corresponding motor controller and reducer. However, the space between the left and right wheels is limited, and the overall volume of the dual-motor powertrain is large, which makes it difficult to arrange the dual motors and their corresponding motor controllers and reducers in the vehicle. Summary of the invention

[0003] The present application provides a dual-motor powertrain and an electric vehicle, which solve the technical problem of fully utilizing the gap between the reducers in the dual-motor powertrain to achieve a reduction in the volume of the dual-motor powertrain.

[0004] In the first aspect, the present application provides a dual-motor powertrain, which includes two drive motors and two reducers, wherein the two reducers are arranged between the two drive motors along the axial direction of the dual-motor powertrain, and the overall housing of the dual-motor powertrain includes an intermediate housing, wherein the two reducers are arranged on both sides of an intermediate housing along the axial direction of the dual-motor powertrain, and an intermediate housing includes two side surfaces and an outer peripheral surface. The two side surfaces are oriented opposite to each other along the axial direction of the dual-motor powertrain, and the two side surfaces respectively include two reducer receiving grooves, wherein the notches of the two reducer receiving grooves are opposite to each other along the axial direction of the dual-motor powertrain, and each reducer receiving groove is used to fix and accommodate multiple bearings of a reducer. An outer peripheral surface includes a receiving groove, wherein the concave direction of the receiving groove faces the gap between the two reducers, and the receiving groove is used to accommodate an electrical component, wherein the electrical component is used to receive the direct current output by the power battery and to transmit the direct current to the motor controllers of the two drive motors respectively.

[0005] In the embodiment of the present application, the outer peripheral surface includes a receiving groove, and the recessed direction of the receiving groove faces the gap between the two reducers, so that the intermediate housing can make full use of the gap between the two reducers to form the receiving groove, and the receiving groove does not occupy too much space outside the overall housing of the dual-motor powertrain. The space in the receiving groove can be used to accommodate some electrical components, thereby saving space for arranging electrical components outside the overall housing, which is conducive to reducing the overall volume of the dual-motor powertrain, thereby facilitating the optimization of the layout of the dual-motor powertrain in the vehicle.

[0006] In the embodiment of the present application, the receiving slot is used to receive the DC power output by the power battery and to transmit the DC power to the motor controllers of the two drive motors respectively, and the DC power is converted into AC power by the motor controllers, and the AC power is transmitted to the two drive motors to drive the two drive motors to operate. Among them, the receiving slot accommodates the electrical components in the motor controller, and the electrical components shared by the two motor controllers can be accommodated in the receiving slot of the intermediate housing, which makes full use of the gap between the two reducers, reduces the layout space of the motor controller, and reduces the overall volume of the dual-motor powertrain, which is conducive to the layout of the dual-motor powertrain in the whole vehicle.

[0007] In one embodiment, each reducer includes an output wheel, the radius of an output wheel of each reducer is larger than the radius of any other gear of each reducer, an output wheel is used to transmit and connect wheels, and a portion of an accommodating groove is recessed toward the gap between an output wheel of two reducers.

[0008] In the embodiment of the present application, a portion of the accommodating groove is recessed toward the gap between the output wheels of the two reducers, so that the gap between the output wheels of the two reducers can be fully utilized by the accommodating groove, which is also beneficial for the accommodating groove to have a larger space to accommodate electrical components, so that more electrical components in the motor controller can be placed in the accommodating groove, which is beneficial for reducing the volume of the part of the motor controller arranged outside the intermediate shell, reducing the overall volume of the dual-motor powertrain, and facilitating the layout of the dual-motor powertrain in the whole vehicle.

[0009] In one embodiment, each reducer further includes an input wheel and an intermediate wheel, wherein the input wheel is used for transmission connection with a motor shaft of a driving motor, and the intermediate wheel is used for transmission connection with an input wheel and an output wheel. The other part of an accommodating groove is recessed along the radial direction of the dual-motor powertrain toward an input wheel and an intermediate wheel of the two reducers.

[0010] In the embodiment of the present application, the radius of the input wheel and the intermediate wheel of each reducer is small, so that there is a larger gap above the input wheel and the intermediate wheel in the radial direction of the dual-motor powertrain, and the other part of the accommodating groove is recessed in the radial direction of the dual-motor powertrain toward the input wheel and the intermediate wheel of the two reducers, so that the space of the input wheels and the intermediate wheels of the two reducers in the radial direction of the dual-motor powertrain is fully utilized by the accommodating groove, so that the accommodating groove has a larger space for accommodating electrical components, which is more conducive to reducing the volume of the motor controller, reducing the overall volume of the dual-motor powertrain, and facilitating the layout of the dual-motor powertrain in the whole vehicle.

[0011] In one embodiment, an intermediate shell also includes two circumferential plates, which are spaced apart along the circumference of the dual-motor powertrain, and each circumferential plate is fixedly connected to the outer sides of the groove walls of the two reducer accommodating grooves. The two circumferential plates are used to enclose the outer sides of the groove walls of the two reducer accommodating grooves to form a accommodating groove.

[0012] In the embodiment of the present application, two circumferential plates are spaced apart along the circumference of the dual-motor powertrain, and each circumferential plate is fixedly connected to the outer side of the groove wall of the two reducer receiving grooves, so that the groove wall of the two reducer receiving grooves can be reused to form the receiving groove, and the space of the two reducer receiving grooves along the radial direction of the dual-motor powertrain is fully utilized, so that the formation of the receiving groove does not increase the space of the dual-motor powertrain along the radial direction of the dual-motor powertrain, and the receiving groove can accommodate electrical components, reduce the overall volume of the dual-motor powertrain, and thus optimize the layout of the vehicle. The two circumferential plates are used to enclose the outer side of the groove wall of the two reducer receiving grooves to form the receiving groove, and can also improve the integration and strength of the intermediate shell, and improve the overall strength of the total shell of the dual-motor powertrain.

[0013] In one embodiment, the bottom of each reducer receiving groove includes a plurality of bearing grooves, each bearing groove is used to fix a bearing, wherein the groove depth of each reducer receiving groove along the axial direction of the dual-motor powertrain is greater than the groove depth of each bearing groove of each reducer receiving groove.

[0014] In an embodiment of the present application, the groove depth of each reducer accommodating groove along the axis of the dual-motor powertrain is greater than the groove depth of each bearing groove of each reducer accommodating groove, so that each reducer accommodating groove has a larger axial space in addition to accommodating the bearings, so that the accommodating groove formed on the outer side of the groove wall of two reducer accommodating grooves can be reused to have a larger axial space, which is beneficial for making the space of the accommodating groove larger, and is beneficial for placing more electrical components in the accommodating groove, reducing the volume of the motor controller, and thereby reducing the overall volume of the dual-motor powertrain.

[0015] In one embodiment, a circumferential plate includes two DC mounting holes, the two DC mounting holes are used to fix a DC connector, and a DC connector is used to electrically connect an electrical component and the positive and negative electrodes of the power battery.

[0016] In the embodiment of the present application, a circumferential plate includes two DC mounting holes, and the two DC mounting holes are used to fix the DC connector, and the DC connector is used to electrically connect the electrical component and the positive and negative electrodes of the power battery. The two DC mounting holes are opened on a circumferential plate close to the power battery, making full use of the space of a circumferential plate. In the embodiment of the present application, the high-voltage DC power output by the power battery is transmitted to the electrical component through the DC connector, and the electrical component outputs the DC power to the motor controllers of the two drive motors.

[0017] In one embodiment, the DC mounting hole passes through a circumferential plate, so that the DC connector can pass through the two DC mounting holes to electrically connect the positive and negative electrodes of the power battery to the electrical components.

[0018] In one embodiment, a receiving slot is also used to receive a control board, and another circumferential plate includes a communication mounting hole, a communication mounting hole is used to fix a communication connector, and a communication connector is used to transmit a control signal to a control board.

[0019] In the embodiment of the present application, the receiving slot is also used to accommodate a control board, which can coordinate the speed of the wheels on both sides of the electric vehicle by controlling the two drive motors, improve the turning response of the vehicle and the stability on different road surfaces, and make driving control more flexible. The communication connector is used to transmit signals from the vehicle to the control board, so that the control board can coordinate and control the two drive motors to ensure the normal operation of the electric vehicle. In one embodiment, the control board can be a board of the vehicle controller.

[0020] In an embodiment of the present application, another circumferential plate includes a communication mounting hole, which is used to fix a communication connector, and the communication connector is used to transmit a control signal to the control board, thereby making full use of the space of the other circumferential plate.

[0021] In one embodiment, two DC mounting holes are formed in one circumferential plate, and the communication mounting holes are formed in another circumferential plate, so that the communication mounting holes and the two DC mounting holes are spaced apart along the circumference of the dual-motor powertrain, so that the communication connector and the DC connector are far apart, which is conducive to reducing the telecommunication interference of the high-voltage DC input from the power battery to the communication connector and the control board. It also makes the DC mounting holes and the communication mounting holes arranged regularly in the intermediate housing.

[0022] In one embodiment, the communication installation hole passes through another circumferential plate, so that the communication connector can transmit the control signal to the control board through the communication installation hole.

[0023] In one embodiment, the groove wall of each reducer receiving groove includes a first power hole and a first communication hole, and each reducer receiving groove is connected to a receiving groove through a first power hole and a first communication hole. Each first power hole is used to pass through a power connector, and a power connector is used to electrically connect an electrical component and a motor controller. Each first communication hole is used to pass through a communication connector, and a communication connector is used to transmit a control signal between a control board and a motor controller.

[0024] In the embodiment of the present application, the groove wall of each reducer receiving groove includes a first power hole and a first communication hole, and each reducer receiving groove is connected to the receiving groove through the first power hole and the first communication hole, so that the power connector and the communication connector can be respectively inserted into the first power hole and the first communication hole to realize the electrical connection between the electrical components and the control board in the receiving groove and the motor controller. Providing the first power hole and the first communication hole in the groove wall of the reducer receiving groove can avoid the DC mounting hole and the communication mounting hole of the two circumferential plates, which is conducive to making the circuit layout in the motor controller in the dual-motor powertrain more regular.

[0025] In the embodiment of the present application, each first power hole is used to pass through a power connector, and the power connector is used to electrically connect the electrical component and the motor controller, so that the high-voltage direct current input by the power battery to the electrical component through the DC connector can be transmitted to the motor controller through the power connector, which can shorten the transmission path and simplify the cable layout. Each first communication hole is used to pass through a communication connector, and the communication connector is used to transmit the control signal between the control board and the motor controller, so that the control signal of the control board can be transmitted to the motor controller through the communication connector provided in the first communication hole, which can shorten the transmission path and simplify the cable layout.

[0026] In one embodiment, along the axial direction of the dual-motor powertrain, the first power hole penetrates the slot wall of the reducer receiving slot, so that the power connector can be inserted into the first power hole, so that the connecting cable between the electrical components in the receiving slot and the motor controller does not need to be additionally arranged outside the intermediate housing and the housing of the motor controller, simplifying the cable arrangement.

[0027] In one embodiment, along the axial direction of the dual-motor powertrain, the first communication hole penetrates the groove wall of the reducer receiving groove, so that the communication connector can be inserted into the first communication hole, so that the control signal cable between the control board in the receiving groove and the motor controller does not need to be additionally arranged outside the intermediate housing and the housing of the motor controller, simplifying the cable arrangement.

[0028] In one embodiment, a distance between the first power hole and each DC mounting hole is smaller than a distance between the first power hole and the communication mounting hole.

[0029] In the embodiment of the present application, the first power hole is opened closer to the DC mounting hole, which is beneficial for the high-voltage DC power input by the power battery to be transmitted to the motor controller more quickly through the DC connector, electrical components, and power connectors passing through the DC mounting hole, which is beneficial for shortening the cable and reducing the power loss of the current.

[0030] In an embodiment of the present application, the power connector in the first power hole and the DC connector in the DC mounting hole are high-voltage devices, and the communication connector in the communication mounting hole is a low-voltage device. The spacing between the first power hole and each DC mounting hole is smaller than the spacing between the first power hole and the communication mounting hole, which can prevent the high voltage electricity transmitted by the power connector and the DC connector from affecting the signal quality transmitted by the communication connector.

[0031] In one embodiment, the distance between the first communication hole and the communication installation hole is smaller than the distance between the first communication hole and the DC installation hole.

[0032] In the embodiment of the present application, the distance between the first communication hole and the communication installation hole is small, which is conducive to the control signal received by the control board from the communication connector installed in the communication installation hole, which can be transmitted from the control board to the motor controller through the communication connector installed in the first communication hole more quickly, so that the control board can coordinate the work of the two drive motors more quickly and timely, and shorten the line. The first communication hole is far away from the DC installation hole, which is conducive to reducing the high-voltage interference of the high-voltage DC input by the DC connector installed in the DC installation hole to the high-voltage communication connector installed in the first communication hole, and ensuring the quality of the signal transmitted from the control board to the motor controller through the communication connector.

[0033] In one embodiment, an intermediate housing further includes a partition plate, which is used to divide a receiving slot into two sub-slots, one sub-slot is used to receive an electrical component, and the other sub-slot is used to receive a control board. A first power hole and a first communication hole in the slot wall of each reducer receiving slot are arranged on both sides of a partition plate.

[0034] In an embodiment of the present application, a partition plate is used to separate the accommodating slot to form two sub-slots, one sub-slot is used to accommodate electrical components, and the other sub-slot is used to accommodate a control board. The partition plate can shield the electrical signals between the electrical components and the control board, so that high-voltage DC transmission of the electrical components in one sub-slot will not affect the signal quality of the control board in the other sub-slot.

[0035] In an embodiment of the present application, the first power hole is used to pass through the power connector, which is used to electrically connect the electrical components and the motor controller. The first communication hole is used to pass through the communication connector, which is used to transmit the control signal between the control board and the motor controller. The first power hole and the first communication hole in the groove wall of each reducer accommodating groove are respectively arranged on both sides of the partition plate, that is, the power connector and the communication connector are respectively arranged on both sides of the partition plate, so that the electrical signals between the power connector and the communication connector will not interfere with each other.

[0036] In one embodiment, the overall housing of the dual-motor powertrain also includes two integrated housings, each of which includes a motor housing, a reducer housing, and a connecting plate. Each motor housing is used to accommodate the stator and rotor of a drive motor, and each reducer housing is used to enclose a reducer accommodating chamber with a reducer accommodating groove of an intermediate housing, and each reducer accommodating chamber is used to accommodate a parallel shaft assembly of a reducer. Among them, a connecting plate is fixed to the outer peripheral wall of a motor housing and the outer wall of a reducer housing, and a connecting plate is used to enclose an electric control slot with a motor housing and a reducer housing, and each electric control slot is used to accommodate a functional component of a motor controller.

[0037] In an embodiment of the present application, a connecting plate is fixed to the outer peripheral wall of the motor housing and the outer wall of the reducer housing, and the connecting plate is used to enclose an electric control slot with the motor housing and the reducer housing. The outer peripheral wall of the motor housing and a part of the outer wall of the reducer housing are reused together with the connecting plate to form the electric control slot. This can make the electric control slot more integrated with the reducer housing and the motor housing, and make the integrated housing more integrated, compact and stronger, which is beneficial to reducing the volume of the overall housing of the dual-motor powertrain and improving the overall structural strength of the overall housing of the dual-motor powertrain.

[0038] In an embodiment of the present application, each electrical control slot is used to accommodate a functional component of a motor controller, so that the high-voltage direct current transmitted from the electrical component in the accommodating slot and the control signal transmitted by the control board can be transmitted to the functional component of the motor controller.

[0039] In the embodiment of the present application, since the receiving groove of the intermediate shell is used to accommodate electrical components for transmitting direct current and filter magnetic rings for filtering direct current, the components of the motor controller outside the intermediate shell are reduced, and the electric control groove formed by the connecting plate and the outer peripheral wall of the motor shell and the outer wall of the reducer shell can accommodate the components of the motor controller outside the intermediate shell, and then the two motor controllers that control the two drive motors can be accommodated through the receiving groove of the intermediate shell and the electric control grooves of the two integrated shells, which is beneficial to reducing the volume of the total shell of the dual-motor powertrain.

[0040] In one embodiment, the length of an electric control slot along the axis of the dual-motor powertrain is less than the length of a motor housing, and the length of an electric control slot along the parallel axis arrangement direction of a reducer is less than the length of a reducer housing.

[0041] In an embodiment of the present application, the length of the electric control slot along the axial direction of the dual-motor powertrain is less than the length of the motor housing, so that the electric control slot will not occupy too much additional space of the dual-motor powertrain along the axial direction of the dual-motor powertrain, which is conducive to reducing the volume of the dual-motor powertrain.

[0042] In the embodiment of the present application, the length of the electric control slot along the parallel axis arrangement direction of the reducer is less than the length of the reducer housing, so that the setting of the electric control slot will not occupy too much extra space of the dual-motor powertrain along the parallel axis arrangement direction of the reducer, which is conducive to making the volume of the dual-motor powertrain smaller. The parallel axis of the reducer includes an input shaft, an intermediate shaft and an output shaft, the intermediate shaft is used for transmission connection between the input shaft and the output shaft, and the parallel axis arrangement direction of the reducer refers to the arrangement direction of the input shaft and the output shaft.

[0043] In one embodiment, a portion of the outer peripheral wall of a motor housing and a portion of the outer wall of a reducer housing respectively constitute two slot walls of an electric control slot, a connecting plate includes a bottom plate and two side plates, the two side plates are the other two slot walls of an electric control slot, and a bottom plate and another portion of the outer wall of a reducer housing constitute the slot bottom of an electric control slot.

[0044] In an embodiment of the present application, part of the outer peripheral wall of the motor housing and part of the outer wall of the reducer housing respectively constitute the two groove walls of the electric control groove. Reusing part of the outer peripheral wall of the motor housing and part of the outer wall of the reducer housing to constitute the two groove walls of the electric control groove can make the integration of the electric control groove with the reducer housing and the motor housing higher, so that the integrated housing has higher integration, compact structure and higher strength, which is conducive to reducing the volume of the overall housing of the dual-motor powertrain and improving the overall structural strength of the overall housing of the dual-motor powertrain.

[0045] In the embodiment of the present application, the bottom plate and another part of the outer wall of the reducer housing constitute the bottom of the electric control slot, and another part of the outer wall of the reused reducer housing constitutes the bottom of the electric control slot, so that the integrated housing has a higher degree of integration, a more compact structure and higher strength, which is beneficial to further reduce the volume of the total housing of the dual-motor powertrain and is beneficial to the layout of the dual-motor powertrain in the whole vehicle.

[0046] In one embodiment, one side plate is arranged opposite to a portion of an outer wall of a reducer housing along the axial direction of the dual-motor powertrain, and the other side plate is arranged opposite to a portion of an outer peripheral wall of a motor housing. The length of the other side plate along the axial direction of the dual-motor powertrain is less than the length of one motor housing. The length of one side plate along the arrangement direction of the other side plate and the portion of the outer peripheral wall of one motor housing is less than the length of one reducer housing.

[0047] In an embodiment of the present application, the length of the other side plate along the axis of the dual-motor powertrain is less than the length of the motor housing, so that the length of the other side plate along the axis of the dual-motor powertrain will not exceed the length of the motor housing, thereby making it possible for the electric control slot to not occupy too much additional space of the dual-motor powertrain along the axis of the dual-motor powertrain, which is beneficial to reducing the volume of the dual-motor powertrain.

[0048] In an embodiment of the present application, the length of one side plate along the arrangement direction of the other side plate and the partial outer peripheral wall of the motor housing is smaller than the length of the reducer housing, so that the length of one side plate along the arrangement direction of the other side plate and the partial outer peripheral wall of the motor housing will not exceed the length of the reducer housing, so that the electric control slot will not occupy too much additional space of the dual-motor powertrain along the arrangement direction of the other side plate and the partial outer peripheral wall of the motor housing, which is beneficial to reducing the volume of the dual-motor powertrain.

[0049] In one embodiment, each integrated housing includes a second power hole and a second communication hole, wherein the second power hole and the second communication hole are used to connect an electric control slot, the second power hole is used to accommodate a power connector between an electrical component and a bus capacitor in a motor controller, and the second communication hole is used to accommodate a communication connector between a control board accommodated in an accommodating slot and a circuit board in a motor controller. Wherein, along the axis of the dual-motor powertrain, the second power hole and the second communication hole of each integrated housing penetrate through a slot wall of an electric control slot of each integrated housing. Along the axis of the dual-motor powertrain, the openings of the second power hole and the second communication hole face an intermediate housing.

[0050] In the embodiment of the present application, the second power hole is used to accommodate the power connector between the electrical component and the bus capacitor in the motor controller, so that the high-voltage DC power transmitted from the power battery to the electrical component through the DC connector is transmitted to the motor controller through the power connector in the second power hole. The second communication hole is used to accommodate the communication connector between the control board and the circuit board in the motor controller, so that after the control signal transmitted by the communication connector is received by the control board, the control board can transmit the control signal to the circuit board in the motor controller through the communication connector in the second communication hole.

[0051] In an embodiment of the present application, the second power hole and the second communication hole of each integrated shell along the axis of the dual-motor powertrain penetrate a slot wall of the electric control slot of each integrated shell, and the slot wall of each reducer accommodating slot along the axis of the dual-motor powertrain includes a first power hole and a first communication hole, so that the first power hole can be arranged relative to the second power hole, the first communication hole can be arranged relative to the second communication hole, the power connector can be inserted into the first power hole and the second power hole, and the communication connector can be inserted into the first communication hole and the second communication hole.

[0052] In the embodiment of the present application, the openings of the second power hole and the second communication hole along the axis of the dual-motor powertrain are oriented toward the intermediate housing, so that the power connector in the first power hole can be smoothly inserted into the second power hole, so that the electrical components in the receiving slot can smoothly transmit the high-voltage direct current to the motor controller through the power connector. The communication connector in the first communication hole can be smoothly inserted into the second communication hole, so that the control board in the receiving slot can smoothly transmit the control signal to the motor controller through the communication connector.

[0053] In a second aspect, the present application provides an electric vehicle, comprising a frame, a power battery and a dual-motor powertrain as in the first aspect, wherein the frame is used to fix the power battery and the dual-motor powertrain, the power battery is used to electrically connect an electrical component of the dual-motor powertrain, and each drive motor is used to drive a wheel through a reducer.

[0054] In the dual-motor powertrain in the embodiment of the present application, the overall housing of the dual-motor powertrain includes an intermediate housing, and the recessed direction of the receiving groove of the intermediate housing is toward the gap between the two reducers, so that the intermediate housing can make full use of the gap between the two reducers to form the receiving groove, and the space in the receiving groove can be used to accommodate some electrical components, thereby saving the space occupied by the electrical components in the dual-motor powertrain, which is beneficial to reducing the overall volume of the dual-motor powertrain, thereby facilitating the optimization of the layout of the dual-motor powertrain in the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0056] Figure 1 is a schematic diagram of an electric vehicle provided in an embodiment of the present application;

[0057] Figure 2 is a schematic diagram of a dual-motor powertrain provided in an embodiment of the present application;

[0058] Figure 3 is another schematic diagram of a dual-motor powertrain provided in an embodiment of the present application;

[0059] Figure 4 A schematic diagram of an intermediate housing provided in an embodiment of the present application;

[0060] Figure 5 This is a schematic diagram of the intermediate housing and the output wheel of the reducer provided in an embodiment of the present application;

[0061] Figure 6 is a cross-sectional view of a dual-motor powertrain provided in an embodiment of the present application;

[0062] Figure 7 is another cross-sectional view of the dual-motor powertrain provided in an embodiment of the present application;

[0063] Figure 8 is another schematic diagram of a dual-motor powertrain provided in an embodiment of the present application;

[0064] Fig. 9 yes Figure 8 A partial enlarged view of the M1 part of the dual-motor powertrain;

[0065] Fig.10 is a schematic diagram of an integrated housing provided in an embodiment of the present application;

[0066] Fig.11 is another schematic diagram of an integrated housing provided in an embodiment of the present application;

[0067] Fig.12 This is another schematic diagram of the integrated housing provided in an embodiment of the present application. DETAILED DESCRIPTION

[0068] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0069] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of the present application are explained and described below.

[0070] EMC: The abbreviation of Electro Magnetic Compatibility, which refers to electromagnetic compatibility. Electromagnetic compatibility refers to the ability of a device or system to operate in accordance with requirements in its electromagnetic environment and not cause intolerable electromagnetic interference to any device in its environment.

[0071] A dual-motor powertrain includes two drive motors and two reducers. The two reducers are arranged between the two drive motors along the axial direction of the dual-motor powertrain. The overall housing of the dual-motor powertrain includes an intermediate housing. The two reducers are arranged on both sides of the intermediate housing along the axial direction of the dual-motor powertrain. The intermediate housing includes two side surfaces and an outer peripheral surface. The two side surfaces are oriented opposite to each other along the axial direction of the dual-motor powertrain. The two side surfaces respectively include two reducer receiving grooves. The notches of the two reducer receiving grooves are opposite to each other along the axial direction of the dual-motor powertrain. Each reducer receiving groove is used to fix and accommodate multiple bearings of a reducer. The outer peripheral surface includes a receiving groove. The concave direction of the receiving groove faces the gap between the two reducers. The receiving groove is used to accommodate an electrical component. The electrical component is used to receive the direct current output by the power battery and to transmit the direct current to the motor controllers of the two drive motors respectively.

[0072] In the embodiment of the present application, the recessed direction of the accommodating groove is toward the gap between the two reducers, so that the intermediate housing can make full use of the gap between the two reducers to form the accommodating groove, and the space in the accommodating groove can be used to accommodate some electrical components, thereby saving the space occupied by the electrical components in the dual-motor powertrain, which is beneficial to reducing the overall volume of the dual-motor powertrain, thereby facilitating optimizing the layout of the dual-motor powertrain in the vehicle.

[0073] The dual-motor powertrain provided in the embodiment of the present application is used in electric vehicles to improve the overall performance of the electric vehicles.

[0074] Figure 1 It is a schematic diagram of the electric vehicle 1 provided in an embodiment of the present application.

[0075] In one embodiment, the electric vehicle 1 includes a dual-motor powertrain 10, a frame 20, a power battery 30, and wheels 40. Figure 1 As shown, the vehicle frame 20 is used to fix the dual-motor powertrain 10 , wheels 40 and the power battery 30 . The dual-motor powertrain 10 is transmission-connected to the wheels 40 , and the power battery 30 provides electrical energy for the dual-motor powertrain 10 .

[0076] In the embodiment of the present application, the electric vehicle 1 is a car, and the dual-motor powertrain 10 can drive the wheels 40 to rotate.

[0077] Figure 2 It is a schematic diagram of a dual-motor powertrain 10 provided in an embodiment of the present application.

[0078] In one embodiment, the dual-motor powertrain 10 includes two drive motors 11 , two reducers 12 , and two motor controllers 13 .

[0079] In the embodiments of the present application, Figure 2 As shown, the power battery 30 is used to supply high-voltage direct current to the two motor controllers 13. The two motor controllers 13 convert the high-voltage direct current into alternating current and transmit it to the two drive motors 11. The motor shafts of the two drive motors 11 are respectively connected to the input shafts of the two reducers 12. The output shafts of the two reducers 12 are respectively connected to the wheels 40 to transmit power to the wheels 40 and drive the wheels 40 to move.

[0080] Each driving motor in the dual-motor powertrain has a corresponding motor controller and a reducer structure, and the overall volume is relatively large. In the embodiment of the present application, by utilizing the space between the parallel gear sets of the two reducers in the dual-motor powertrain, the housing of the dual-motor powertrain is recessed toward the gap between the two reducers to form a receiving groove, and the receiving groove is used to accommodate some electrical components, so that the space between the two reducers can be fully utilized, which is conducive to reducing the overall volume of the dual-motor powertrain.

[0081] The dual-motor powertrain 10 provided in an embodiment of the present application will be described in detail below.

[0082] Figure 3 is another schematic diagram of a dual-motor powertrain 10 provided in an embodiment of the present application, Figure 4 A schematic diagram of the intermediate housing 100 provided in an embodiment of the present application, Figure 5 1 is a schematic diagram of the intermediate housing 100 and the output wheel 1201 of the reducer 12 provided in an embodiment of the present application. Figure 6 It is a cross-sectional view of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0083] In one embodiment, if Figures 3 to 6 As shown, a dual-motor powertrain 10 includes two drive motors 11 and two reducers 12. The two reducers 12 are arranged between the two drive motors 11 along the axial direction O of the dual-motor powertrain 10. The overall housing 10a of the dual-motor powertrain 10 includes an intermediate housing 100. The two reducers 12 are arranged on both sides of the intermediate housing 100 along the axial direction O of the dual-motor powertrain 10. Figure 4 As shown, the intermediate housing 100 includes two side surfaces 110 and an outer peripheral surface 120. The two side surfaces 110 are oriented opposite to each other along the axial direction O of the dual-motor powertrain 10, and the two side surfaces 110 respectively include two reducer receiving grooves 111, and the notches 111a of the two reducer receiving grooves 111 are oriented opposite to each other along the axial direction O of the dual-motor powertrain 10, as shown in FIG. Figure 5 As shown, each reducer receiving groove 111 is used to fix and receive a plurality of bearings 112a of a reducer 12. Figure 5 and Figure 6 As shown, the outer peripheral surface 120 includes a receiving groove 121, the recessed direction of the receiving groove 121 is toward the gap between the two reducers 12, and the receiving groove 121 is used to accommodate an electrical component 122, and the electrical component 122 is used to receive the direct current output by the power battery 30 and to respectively transmit direct current to the motor controllers 13 of the two drive motors 11.

[0084] In the embodiment of the present application, the two side surfaces 110 are oriented opposite to each other along the axial direction O of the dual-motor powertrain 10, and the two side surfaces 110 respectively include two reducer accommodating grooves 111, and the notches 111a of the two reducer accommodating grooves 111 are oriented opposite to each other along the axial direction O of the dual-motor powertrain 10, so that the multiple bearings 112a of the two reducers 12 in the dual-motor powertrain 10 can work independently without interfering with each other, which is beneficial for the dual-motor powertrain 10 to independently control the two wheels 40 of the electric vehicle 1.

[0085] In the embodiment of the present application, the outer peripheral surface 120 includes a receiving groove 121, and the recessed direction of the receiving groove 121 faces the gap between the two reducers 12, so that the intermediate housing 100 can make full use of the gap between the two reducers 12 to form the receiving groove 121, and the receiving groove 121 does not occupy too much space outside the main housing 10a of the dual-motor powertrain 10. The space in the receiving groove 121 can be used to accommodate some electrical components, thereby saving space for arranging electrical components outside the main housing 10a, which is conducive to reducing the overall volume of the dual-motor powertrain 10, thereby facilitating the optimization of the layout of the dual-motor powertrain 10 in the vehicle.

[0086] In the embodiment of the present application, the receiving groove 121 is used to receive an electrical component 122, and the electrical component 122 is used to receive the DC power output by the power battery 30 and to transmit the DC power to the motor controllers 13 of the two drive motors 11 respectively, and the DC power is converted into AC power by the motor controller 13, and the AC power is transmitted to the two drive motors 11 to drive the two drive motors 11 to operate. Among them, the receiving groove 121 accommodates the electrical component 122 in the motor controller 13, and the electrical component 122 shared by the two motor controllers 13 can be accommodated in the receiving groove 121 of the intermediate housing 100, which fully utilizes the gap between the two reducers 12, reduces the layout space of the motor controller 13, and reduces the overall volume of the dual-motor powertrain 10, which is beneficial to the layout of the dual-motor powertrain 10 in the whole vehicle.

[0087] Among them, the bearing 112a is Figure 4 The figure only shows the schematic position of the bearing 112a, not the specific structure. The electrical component 122 is Figure 4 and Figure 5 The figure only represents the schematic position of the electrical component 122 and does not represent the specific structure.

[0088] In the embodiment of the present application, the two side surfaces 110 of the intermediate housing 100 respectively include two reducer receiving grooves 111, and the notches 111a of the two reducer receiving grooves 111 are opposite to each other along the axial direction O of the dual-motor powertrain 10, so that the multiple bearings 112a of the two reducers 12 on both sides of the intermediate housing 100 can be received in the two reducer receiving grooves 111, thereby reducing the axial size of the dual-motor powertrain 10. The receiving groove 121 of the outer peripheral surface 120 of the intermediate housing 100 is recessed toward the gap between the two reducers 12, and the receiving groove 121 is formed by using the gap between the two reducers 12. The receiving groove 121 is used to receive the electrical components 122 of the motor controller 13, thereby reducing the volume of the part of the motor controller 13 arranged outside the intermediate housing 100, so that the overall volume of the dual-motor powertrain 10 is further reduced, and the layout of the dual-motor powertrain 10 in the vehicle is optimized.

[0089] In one embodiment, each reducer 12 includes an output wheel 1201, such as Figure 5 and Figure 6 As shown, the radius of the output wheel 1201 of each reducer 12 is greater than the radius of any other gear of each reducer 12, the output wheel 1201 is used to transmit and connect the wheel 40, and a portion 121a of the accommodating groove 121 is recessed toward the gap between the output wheels 1201 of the two reducers 12.

[0090] In the embodiment of the present application, a portion 121a of the accommodating groove 121 is recessed toward the gap between the output wheels 1201 of the two reducers 12, so that the gap between the output wheels 1201 of the two reducers 12 can be fully utilized by the accommodating groove 121, which is also beneficial for the accommodating groove 121 to have a larger space to accommodate electrical components, so that more electrical components in the motor controller 13 can be placed in the accommodating groove 121, which is beneficial for reducing the volume of the part of the motor controller 13 arranged outside the intermediate shell 100, reducing the overall volume of the dual-motor powertrain 10, and facilitating the layout of the dual-motor powertrain 10 in the whole vehicle.

[0091] Figure 7 It is another cross-sectional view of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0092] In one embodiment, each reducer 12 further includes an input wheel 1202 and an intermediate wheel 1203. Figure 5 As shown, the input wheel 1202 is used to drive and connect the motor shaft of a driving motor 11, and the intermediate wheel 1203 is used to drive and connect the input wheel 1202 and the output wheel 1201. Figure 7 As shown, another portion 121 b of the accommodating groove 121 is recessed along the radial direction R of the dual-motor powertrain toward the input wheels 1202 and the intermediate wheels 1203 of the two reducers 12 .

[0093] In the embodiment of the present application, the radius of the input wheel 1202 and the intermediate wheel 1203 of each reducer 12 is relatively small, so that the input wheel 1202 and the intermediate wheel 1203 have a larger gap above the radial direction R of the dual-motor powertrain, and the other part 121b of the accommodating groove 121 is recessed along the radial direction R of the dual-motor powertrain toward the input wheels 1202 and the intermediate wheels 1203 of the two reducers 12, so that the space of the input wheels 1202 and the intermediate wheels 1203 of the two reducers 12 along the radial direction R of the dual-motor powertrain is fully utilized by the accommodating groove 121, so that the accommodating groove 121 has a larger space for accommodating the electrical component 122, which is more conducive to reducing the volume of the motor controller 13, reducing the overall volume of the dual-motor powertrain 10, and facilitating the layout of the dual-motor powertrain 10 in the whole vehicle.

[0094] In one embodiment, the intermediate housing 100 further includes two circumferential plates 130a, 130b. Figure 4 As shown, the two circumferential plates 130a and 130b are spaced apart along the circumference C of the dual-motor powertrain, and each circumferential plate 130 is fixedly connected to the outer sides of the groove walls 111b of the two reducer receiving grooves 111. The two circumferential plates 130a and 130b are used to enclose the outer sides of the groove walls 111b of the two reducer receiving grooves 111 to form a receiving groove 121.

[0095] In the embodiment of the present application, two circumferential plates 130a and 130b are spaced apart along the circumferential direction C of the dual-motor powertrain, and each circumferential plate 130 is fixedly connected to the outer side of the groove wall 111b of the two reducer receiving grooves 111, so that the groove wall 111b of the two reducer receiving grooves 111 can be reused to form the receiving groove 121, and the space of the two reducer receiving grooves 111 along the radial direction R of the dual-motor powertrain is fully utilized, so that the formation of the receiving groove 121 does not increase the space of the dual-motor powertrain 10 along the radial direction R of the dual-motor powertrain, and the receiving groove 121 can accommodate the electrical component 122, reduce the overall volume of the dual-motor powertrain 10, and thus optimize the layout of the whole vehicle. The two circumferential plates 130a and 130b are used to enclose the outer side of the groove wall 111b of the two reducer receiving grooves 111 to form the receiving groove 121, and can also improve the integration and strength of the intermediate housing 100, and improve the overall strength of the overall housing 10a of the dual-motor powertrain 10.

[0096] In one embodiment, if Figure 4 As shown, the groove bottom 111c of each reducer receiving groove 111 includes a plurality of bearing grooves 112, and each bearing groove 112 is used to fix a bearing 112a. In which, along the axial direction O of the dual-motor powertrain, the groove depth of each reducer receiving groove 111 is greater than the groove depth of each bearing groove 112 of each reducer receiving groove 111.

[0097] In the embodiment of the present application, the groove depth of each reducer accommodating groove 111 along the axial direction O of the dual-motor powertrain is greater than the groove depth of each bearing groove 112 of each reducer accommodating groove 111, so that each reducer accommodating groove 111 has a larger axial space in addition to accommodating the bearing 112a, so that the accommodating groove 121 formed on the outer side of the groove wall 111b of the two reducer accommodating grooves 111 can be reused to have a larger axial space, which is beneficial to make the space of the accommodating groove 121 larger, and it is beneficial to place more electrical components in the accommodating groove 121, reduce the volume of the motor controller 13, and then reduce the overall volume of the dual-motor powertrain 10.

[0098] Figure 8 It is another schematic diagram of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0099] In one embodiment, if Figure 3 and Figure 4 As shown, a circumferential plate 130a includes two DC mounting holes 128a, and the two DC mounting holes 128a are used to fix a DC connector 101, such as Figure 3 and Figure 8 As shown, the DC connector 101 is used to electrically connect the electrical component 122 and the positive and negative electrodes of the power battery 30 .

[0100] In the embodiment of the present application, the circumferential plate 130a includes two DC mounting holes 128a, which are used to fix the DC connector 101. The DC connector 101 is used to electrically connect the electrical component 122 and the positive and negative electrodes of the power battery 30. The two DC mounting holes 128a are opened on the circumferential plate 130a close to the power battery 30, making full use of the space of the circumferential plate 130a. In the embodiment of the present application, the high-voltage DC power output by the power battery 30 is transmitted to the electrical component 122 through the DC connector 101, and the electrical component 122 outputs the DC power to the motor controller 13 of the two drive motors 11.

[0101] In one embodiment, if Figure 3 and Figure 8 As shown, the DC installation hole 128a penetrates the circumferential plate 130a, so that the DC connector 101 can pass through the two DC installation holes 128a to electrically connect the positive and negative electrodes of the power battery 30 with the electrical component 122.

[0102] In one embodiment, the receiving groove 121 is used to receive a filter magnetic ring 122a, and the filter magnetic ring 122a is sleeved on the copper bar connected to the DC connector 101, and is used to filter the high-voltage DC power input by the power battery 30, thereby reducing the EMC interference of the high-voltage DC power on the electrical component 122, thereby ensuring that the electrical signal transmitted to the motor controller 13 is more accurate and the normal operation of the motor controller 13 is ensured. The filter magnetic ring 122a is received in the receiving groove 121, so that the arrangement of the filter magnetic ring 122a does not occupy the space outside the intermediate housing 100, thereby reducing the overall volume of the dual-motor powertrain 10.

[0103] In one embodiment, if Figure 4 and Figure 8 As shown, the accommodating groove 121 is also used to accommodate a control board 123 , and another circumferential plate 130 b includes a communication mounting hole 128 b , and the communication mounting hole 128 b is used to fix a communication connector 102 , and the communication connector 102 is used to transmit control signals to the control board 123 .

[0104] In the embodiment of the present application, the receiving slot 121 is also used to receive the control board 123. The control board 123 can coordinate the speed of the wheels 40 on both sides of the electric vehicle 1 by controlling the two drive motors 11, thereby improving the turning response of the vehicle and the stability on different road surfaces, and making driving control more flexible. The communication connector 102 is used to transmit signals from the vehicle to the control board 123, so that the control board 123 can coordinate and control the two drive motors 11 to ensure the normal operation of the electric vehicle 1. In one embodiment, the control board 123 can be a board of the vehicle controller.

[0105] In the embodiment of the present application, the circumferential plate 130b includes a communication mounting hole 128b, which is used to fix the communication connector 102, and the communication connector 102 is used to transmit control signals to the control board 123, thereby making full use of the space of the circumferential plate 130b.

[0106] In one embodiment, two DC mounting holes 128a are formed on the circumferential plate 130a, and the communication mounting hole 128b is formed on the circumferential plate 130b, so that the communication mounting hole 128b and the two DC mounting holes 128a are spaced apart along the circumferential direction C of the dual-motor powertrain, so that the communication connector 102 and the DC connector 101 are far apart, which is conducive to reducing the telecommunication interference of the high-voltage DC input from the power battery 30 on the communication connector 102 and the control board 123. The DC mounting holes 128a and the communication mounting holes 128b are also arranged neatly in the intermediate housing 100.

[0107] In one embodiment, if Figure 4 and Figure 8 As shown, the communication installation hole 128b passes through the circumferential plate 130b, so that the communication connector 102 can transmit the control signal to the control board 123 through the communication installation hole 128b.

[0108] In one embodiment, the groove wall 111b of each reducer receiving groove 111 includes a first power hole 128c and a first communication hole 128d. Figure 4 As shown, each reducer receiving groove 111 is connected to the receiving groove 121 through the first power hole 128c and the first communication hole 128d. Figure 8 As shown, each first power hole 128c is used to pass through a power connector 103, and the power connector 103 is used to electrically connect the electrical component 122 and the motor controller 13. Each first communication hole 128d is used to pass through a communication connector 104, and the communication connector 104 is used to transmit control signals between the control board 123 and the motor controller 13.

[0109] In the embodiment of the present application, the groove wall 111b of each reducer receiving groove 111 includes a first power hole 128c and a first communication hole 128d, and each reducer receiving groove 111 is connected to the receiving groove 121 through the first power hole 128c and the first communication hole 128d, respectively, so that the power connector 103 and the communication connector 104 can be respectively inserted into the first power hole 128c and the first communication hole 128d, so as to realize the electrical connection between the electrical component 122 and the control board 123 in the receiving groove 121 and the motor controller 13. The first power hole 128c and the first communication hole 128d are provided in the groove wall 111b of the reducer receiving groove 111, so as to avoid the DC mounting hole 128a and the communication mounting hole 128b of the two circumferential plates 130a and 130b, which is conducive to making the circuit layout in the motor controller 13 in the dual-motor powertrain 10 more regular.

[0110] In the embodiment of the present application, each first power hole 128c is used to pass through the power connector 103, and the power connector 103 is used to electrically connect the electrical component 122 and the motor controller 13, so that the high-voltage direct current input to the electrical component 122 by the power battery 30 through the DC connector 101 can be transmitted to the motor controller 13 through the power connector 103, which can shorten the transmission path and simplify the cable arrangement. Each first communication hole 128d is used to pass through a communication connector 104, and the communication connector 104 is used to transmit the control signal between the control board 123 and the motor controller 13, so that the control signal of the control board 123 can be transmitted to the motor controller 13 through the communication connector 104 provided in the first communication hole 128d, which can shorten the transmission path and simplify the cable arrangement.

[0111] In one embodiment, the power connector 103 is used to electrically connect the electrical component 122 and the bus capacitor of the motor controller 13. The direct current transmitted by the power connector 103 is transmitted to the power module of the motor controller 13 through the bus capacitor. The power module is used to convert the direct current into alternating current and provide it to the drive motor 11.

[0112] like Figure 4 and Figure 8 As shown, in one embodiment, along the axial direction O of the dual-motor powertrain, the first power hole 128c penetrates the slot wall 111b of the reducer receiving slot 111. The power connector 103 can be inserted into the first power hole 128c, so that the connecting cable between the electrical component 122 in the receiving slot 121 and the motor controller 13 does not need to be additionally arranged outside the intermediate housing 100 and the housing of the motor controller 13, simplifying the cable arrangement.

[0113] like Figure 4 and Figure 8As shown, in one embodiment, along the axial direction O of the dual-motor powertrain, the first communication hole 128d penetrates the slot wall 111b of the reducer receiving slot 111. The communication connector 104 can be inserted into the first communication hole 128d, so that the cable of the control signal between the control board 123 in the receiving slot 121 and the motor controller 13 does not need to be additionally arranged outside the intermediate housing 100 and the housing of the motor controller 13, simplifying the cable arrangement.

[0114] In one embodiment, if Figure 4 and Figure 8 As shown, the distance between the first power hole 128c and each DC mounting hole 128a is smaller than the distance between the first power hole 128c and the communication mounting hole 128b.

[0115] In the embodiment of the present application, the first power hole 128c is opened closer to the DC mounting hole 128a, which is beneficial for the high-voltage DC power input by the power battery 30 to be transmitted to the motor controller 13 more quickly through the DC connector 101, the electrical component 122, and the power connector 103 passing through the first power hole 128c that pass through the DC mounting hole 128a, which is beneficial for shortening the cable and reducing the power loss of the current.

[0116] In the embodiment of the present application, the power connector 103 in the first power hole 128c and the DC connector 101 in the DC mounting hole 128a are high-voltage devices, and the communication connector 102 in the communication mounting hole 128b is a low-voltage device. The distance between the first power hole 128c and each DC mounting hole 128a is smaller than the distance between the first power hole 128c and the communication mounting hole 128b, which can prevent the high voltage electricity transmitted by the power connector 103 and the DC connector 101 from affecting the signal quality transmitted by the communication connector 102.

[0117] In one embodiment, if Figure 4 and Figure 8 As shown, the distance between the first communication hole 128d and the communication installation hole 128b is smaller than the distance between the first communication hole 128d and the DC installation hole 128a.

[0118] In the embodiment of the present application, the distance between the first communication hole 128d and the communication installation hole 128b is small, which is conducive to the control signal received by the control board 123 from the communication connector 102 installed in the communication installation hole 128b, which can be transmitted from the control board 123 to the motor controller 13 through the communication connector 104 installed in the first communication hole 128d more quickly, so that the control board 123 can coordinate the work of the two drive motors 11 more quickly and timely, and can also shorten the line. The first communication hole 128d is farther away from the DC installation hole 128a, which is conducive to reducing the high-voltage interference of the high-voltage DC input by the DC connector 101 installed in the DC installation hole 128a to the high-voltage communication connector 104 installed in the first communication hole 128d, and ensuring the signal quality transmitted from the control board 123 to the motor controller 13 through the communication connector 104.

[0119] In one embodiment, if Figure 4 As shown, each side surface 110 of the intermediate housing 100 includes a mounting surface 113, and the mounting surface 113 of each side surface 110 surrounds the reducer receiving groove 111, and the mounting surface 113 of each side surface 110 is used to fix the integrated housing 200, wherein the first power hole 128c and the first communication hole 128d of each side surface 110 penetrate the mounting surface 113 of each side surface 110 along the axial direction O of the dual-motor powertrain. The first power hole 128c and the first communication hole 128d are formed on the mounting surface 113, so that the power connector 103 in the first power hole 128c and the communication connector 104 in the first communication hole 128d avoid the gear shaft assembly in the reducer receiving groove 111, and prevent the power connector 103 and the communication connector 104 from being damaged by the rotating gear.

[0120] In one embodiment, the intermediate housing 100 further includes a partition plate 124. Figure 5 and Figure 8 As shown, the partition plate 124 is used to separate the receiving slot 121 to form two sub-slots 125a and 125b, one sub-slot 125a is used to receive the electrical component 122, and the other sub-slot 125b is used to receive the control board 123. The first power hole 128c and the first communication hole 128d in the slot wall 111b of each reducer receiving slot 111 are arranged on both sides of a partition plate 124, respectively.

[0121] In an embodiment of the present application, the partition plate 124 is used to separate the accommodating slot 121 to form two sub-slots 125a and 125b. The sub-slot 125a is used to accommodate the electrical component 122, and the sub-slot 125b is used to accommodate the control board 123. The partition plate 124 can shield the electrical signal between the electrical component 122 and the control board 123, so that the high-voltage DC transmission of the electrical component 122 in the sub-slot 125a will not affect the signal quality of the control board 123 in the sub-slot 125b.

[0122] In the embodiment of the present application, the first power hole 128c is used to pass through the power connector 103, the power connector 103 is used to electrically connect the electrical component 122 and the motor controller 13, the first communication hole 128d is used to pass through the communication connector 104, the communication connector 104 is used to transmit the control signal between the control board 123 and the motor controller 13, and the first power hole 128c and the first communication hole 128d in the groove wall 111b of each reducer accommodating groove 111 are respectively arranged on both sides of the partition plate 124, that is, the power connector 103 and the communication connector 104 are respectively arranged on both sides of the partition plate 124, so that the electrical signals between the power connector 103 and the communication connector 104 will not interfere with each other.

[0123] In one embodiment, if Figure 5 and Figure 8 As shown, the intermediate shell 100 also includes another partition plate 126, which is used to separate the sub-slot 125b to form two first slots 126a and 126b. One first slot 126a is used to accommodate the control board 123, and the other first slot 126b is used to accommodate a part of the communication connector 102 or to accommodate electrical components connected to the communication connector 102. The partition plate 126 can isolate the control board 123 and the communication connector 102 for telecommunication, which is beneficial to improving the signal quality transmitted by the communication connector 102.

[0124] Fig. 9 yes Figure 8 A partial enlarged view of the M1 portion of the dual-motor powertrain 10.

[0125] In one embodiment, if Figure 8 and Fig. 9 As shown, the sub-slot 125b is also used to accommodate a conductive rubber plug 127. The communication connector 104 in the first communication hole 128d of the slot wall 111b of the two reducer accommodating slots 111 between the control board 123 and the two reducer accommodating slots 111 passes through the conductive rubber plug 127. The conductive rubber plug 127 can reduce the EMC interference of the electrical component 122 in the sub-slot 125a to the control board 123 and the communication connector 104. In the embodiment of the present application, the communication connector 104 can be a cable.

[0126] Fig.10 is a schematic diagram of an integrated housing 200 provided in an embodiment of the present application. Fig.11 It is another schematic diagram of the integrated housing 200 provided in an embodiment of the present application.

[0127] In one embodiment, the overall housing 10a of the dual-motor powertrain 10 further includes two integrated housings 200, such as Fig.10As shown, each integrated housing 200 includes a motor housing 210, a reducer housing 220 and a connecting plate 230. Each motor housing 210 is used to accommodate a stator and a rotor of a driving motor 11. Figure 8 and Fig.10 As shown, each reducer housing 220 is used to enclose a reducer receiving groove 111 of the intermediate housing 100 to form a reducer receiving chamber 221, and each reducer receiving chamber 221 is used to accommodate a parallel shaft assembly of a reducer 12. Fig.10 and Fig.11 As shown, the connecting plate 230 is fixed to the outer wall 211 of the motor housing 210 and the outer wall 222 of the reducer housing 220. The connecting plate 230 is used to enclose an electric control slot 240 with the motor housing 210 and the reducer housing 220. Each electric control slot 240 is used to accommodate a functional component 241 of a motor controller 13.

[0128] In the embodiment of the present application, the connecting plate 230 is fixed to the outer wall 211 of the motor housing 210 and the outer wall 222 of the reducer housing 220. The connecting plate 230 is used to enclose an electric control groove 240 with the motor housing 210 and the reducer housing 220. The outer wall 211 of the motor housing 210 and a part of the outer wall 222 of the reducer housing 220 are reused together with the connecting plate 230 to enclose the electric control groove 240. The integration of the electric control groove 240 with the reducer housing 220 and the motor housing 210 can be higher, and the integrated housing 200 can be more integrated, compact and stronger, which is beneficial to reducing the volume of the overall housing 10a of the dual-motor powertrain 10 and improving the overall structural strength of the overall housing 10a of the dual-motor powertrain 10.

[0129] In an embodiment of the present application, each electrical control slot 240 is used to accommodate a functional component 241 of a motor controller 13, so that the high-voltage direct current transmitted from the electrical component 122 in the accommodating slot 121 and the control signal transmitted by the control board 123 can be transmitted to the functional component 241 of the motor controller 13.

[0130] In the embodiment of the present application, since the receiving groove 121 of the intermediate shell 100 is used to accommodate the electrical component 122 for transmitting direct current and the filter magnetic ring 122a for filtering direct current, the components of the motor controller 13 outside the intermediate shell 100 are reduced, and the electric control groove 240 formed by the connecting plate 230 and the outer peripheral wall 211 of the motor shell 210 and the outer wall 222 of the reducer shell 220 can accommodate the components of the motor controller 13 outside the intermediate shell 100, and then the receiving groove 121 of the intermediate shell 100 and the electric control grooves 240 of the two integrated shells 200 can accommodate two motor controllers 13 that control two drive motors 11, which is beneficial to reducing the volume of the overall shell 10a of the dual-motor powertrain 10.

[0131] In one embodiment, if Figure 8 As shown, the functional components 241 in the motor controller 13 include bus capacitors, power modules, and three-phase copper busbars.

[0132] Fig.12 It is another schematic diagram of the integrated housing 200 provided in an embodiment of the present application.

[0133] In one embodiment, if Fig.12 As shown, the length of the electric control slot 240 along the axial direction O of the dual-motor powertrain is less than the length of the motor housing 210 , and the length of the electric control slot 240 along the parallel axis arrangement direction X of the reducer 12 is less than the length of the reducer housing 220 .

[0134] In the embodiment of the present application, the length of the electric control slot 240 along the axial direction O of the dual-motor powertrain is recorded as L1, and the length of the motor housing 210 is recorded as L2, L1<L2, so that the electric control slot 240 will not occupy too much additional space of the dual-motor powertrain 10 along the axial direction O of the dual-motor powertrain, which is beneficial to reducing the volume of the dual-motor powertrain 10.

[0135] In the embodiment of the present application, the length of the electric control slot 240 along the parallel axis arrangement direction X of the reducer 12 is recorded as L3, and the length of the reducer housing 220 is recorded as L4, L3<L4, so that the setting of the electric control slot 240 will not occupy too much extra space of the dual-motor powertrain 10 along the parallel axis arrangement direction X of the reducer 12, which is conducive to making the volume of the dual-motor powertrain 10 smaller. The parallel axis of the reducer 12 includes an input shaft, an intermediate shaft and an output shaft, and the intermediate shaft is used for transmission connection between the input shaft and the output shaft. The parallel axis arrangement direction X of the reducer 12 refers to the arrangement direction of the input shaft and the output shaft. Fig.12 L3 and L4 are used to illustrate the length measurement range, which is specifically measured in the parallel axis arrangement direction X of the reducer 12 in the actual product.

[0136] In one embodiment, if Fig.10 As shown, a portion of the outer peripheral wall 211 of the motor housing 210 and a portion of the outer wall 223a of the reducer housing 220 respectively constitute two slot walls 242 of the electric control slot 240, and the connecting plate 230 includes a bottom plate 231 and two side plates 232a, 232b, and the two side plates 232a, 232b are respectively the other two slot walls 243 of the electric control slot 240. Fig.11 As shown, the bottom plate 231 and another portion of the outer wall 223 b of the reducer housing 220 form the bottom of the electric control slot 240 .

[0137] In the embodiment of the present application, part of the outer peripheral wall 211 of the motor housing 210 and part of the outer wall 223a of the reducer housing 220 respectively constitute the two groove walls 242 of the electric control groove 240. Reusing part of the outer peripheral wall 211 of the motor housing 210 and part of the outer wall 223a of the reducer housing 220 to constitute the two groove walls 242 of the electric control groove 240 can make the integration of the electric control groove 240 with the reducer housing 220 and the motor housing 210 higher, so that the integrated housing 200 has a higher integration degree, a compact structure and higher strength, which is beneficial to reducing the volume of the overall housing 10a of the dual-motor powertrain 10 and improving the overall structural strength of the overall housing 10a of the dual-motor powertrain 10.

[0138] In the embodiment of the present application, the bottom plate 231 and another part of the outer wall 223b of the reducer housing 220 constitute the bottom of the electric control slot 240. The other part of the outer wall 223b of the reused reducer housing 220 constitutes the bottom of the electric control slot 240, so that the integrated housing 200 has a higher degree of integration, a more compact structure and higher strength, which is beneficial to further reduce the volume of the overall housing 10a of the dual-motor powertrain 10, and is beneficial to the layout of the dual-motor powertrain 10 in the whole vehicle.

[0139] In one embodiment, if Fig.10 As shown, one side plate 232a is arranged opposite to a portion of the outer wall 223a of the reducer housing 220 along the axial direction O of the dual-motor powertrain, and the other side plate 232b is arranged opposite to a portion of the outer peripheral wall 211 of the motor housing 210. Fig.12 As shown, the length of the side plate 232b along the axial direction O of the dual-motor powertrain is less than the length of the motor housing 210. The length of the side plate 232a along the arrangement direction of the side plate 232b and the partial peripheral wall 211 of the motor housing 210 is less than the length of the reducer housing 220.

[0140] In the embodiments of the present application, Fig.12 As shown, the length of the side plate 232b along the axial direction O of the dual-motor powertrain is recorded as L5, and the length of the motor housing 210 is L2, L5<L2, so that the length of the side plate 232b along the axial direction O of the dual-motor powertrain will not exceed the length of the motor housing 210, so that the electric control slot 240 will not occupy too much additional space of the dual-motor powertrain 10 along the axial direction O of the dual-motor powertrain, which is beneficial to reducing the volume of the dual-motor powertrain 10.

[0141] In the embodiments of the present application, Fig.12As shown, along the arrangement direction of the side plate 232b and the partial outer peripheral wall 211 of the motor housing 210, the length of the side plate 232a is recorded as L6, and the length of the reducer housing 220 is L4, L6<L4, so that the length of the side plate 232a along the arrangement direction of the side plate 232b and the partial outer peripheral wall 211 of the motor housing 210 will not exceed the length of the reducer housing 220, so that the electric control slot 240 will not occupy too much additional space of the dual-motor powertrain 10 along the arrangement direction of the side plate 232b and the partial outer peripheral wall 211 of the motor housing 210, which is beneficial to reducing the volume of the dual-motor powertrain 10.

[0142] In one embodiment, if Figure 8 and Fig.10 As shown, each integrated housing 200 includes a second power hole 224a and a second communication hole 224b, the second power hole 224a and the second communication hole 224b are used to connect the electric control slot 240, the second power hole 224a is used to accommodate the power connector 103 between the electrical component 122 and the bus capacitor in the motor controller 13, and the second communication hole 224b is used to accommodate the communication connector 104 between the control board 123 accommodated in the accommodating slot 121 and the circuit board 13a in the motor controller 13. The second power hole 224a and the second communication hole 224b of each integrated housing 200 along the axial direction O of the dual-motor powertrain penetrate a slot wall 242 of the electric control slot 240 of each integrated housing 200. The openings of the second power hole 224a and the second communication hole 224b along the axial direction O of the dual-motor powertrain face the intermediate housing 100.

[0143] In the embodiment of the present application, the second power hole 224a is used to accommodate the power connector 103 between the electrical component 122 and the bus capacitor in the motor controller 13, so that the high-voltage direct current transmitted from the power battery 30 to the electrical component 122 through the DC connector 101 is transmitted to the motor controller 13 through the power connector 103 in the second power hole 224a. The second communication hole 224b is used to accommodate the communication connector 104 between the control board 123 and the circuit board 13a in the motor controller 13, so that after the control signal transmitted by the communication connector 102 is received by the control board 123, the control board 123 can transmit the control signal to the circuit board 13a in the motor controller 13 through the communication connector 104 in the second communication hole 224b.

[0144] In the embodiment of the present application, the second power hole 224a and the second communication hole 224b of each integrated housing 200 along the axial direction O of the dual-motor powertrain penetrate a slot wall 242 of the electric control slot 240 of each integrated housing 200, and the slot wall 111b of each reducer accommodating slot 111 along the axial direction O of the dual-motor powertrain includes a first power hole 128c and a first communication hole 128d, so that the first power hole 128c can be arranged relative to the second power hole 224a, and the first communication hole 128d can be arranged relative to the second communication hole 224b, so that the power connector 103 can be inserted into the first power hole 128c and the second power hole 224a, and the communication connector 104 can be inserted into the first communication hole 128d and the second communication hole 224b.

[0145] In the embodiment of the present application, the openings of the second power hole 224a and the second communication hole 224b along the axial direction O of the dual-motor powertrain face the intermediate housing 100, so that the power connector 103 in the first power hole 128c can be smoothly inserted into the second power hole 224a, so that the electrical component 122 in the receiving slot 121 can smoothly transmit the high-voltage direct current to the motor controller 13 through the power connector 103. The communication connector 104 in the first communication hole 128d can be smoothly inserted into the second communication hole 224b, so that the control board 123 in the receiving slot 121 can smoothly transmit the control signal to the motor controller 13 through the communication connector 104.

[0146] The dual-motor powertrain and electric vehicle provided in the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and embodiments of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A dual-motor powertrain, characterized in that: The dual-motor powertrain includes two drive motors and two reducers, the two reducers are arranged between the two drive motors along the axial direction of the dual-motor powertrain, the overall housing of the dual-motor powertrain includes an intermediate housing, the two reducers are arranged on both sides of the intermediate housing along the axial direction of the dual-motor powertrain, and the intermediate housing includes two side surfaces and an outer peripheral surface, wherein: The two side surfaces are oriented opposite to each other along the axial direction of the dual-motor powertrain, and the two side surfaces respectively include two reducer receiving grooves, the notches of the two reducer receiving grooves are opposite to each other along the axial direction of the dual-motor powertrain, and each reducer receiving groove is used to fix and receive a plurality of bearings of a reducer; The outer peripheral surface includes a receiving groove, the recessed direction of the receiving groove is toward the gap between the two reducers, and the receiving groove is used to accommodate an electrical component, and the electrical component is used to receive direct current output by the power battery and to respectively transmit direct current to the motor controllers of the two drive motors.

2. The dual-motor powertrain according to claim 1, characterized in that: Each of the reducers includes an output wheel, the radius of the output wheel of each of the reducers is larger than the radius of any other gear of each of the reducers, the output wheel is used to transmit and connect the wheels, and a portion of the accommodating groove is recessed toward the gap between the output wheels of the two reducers.

3. The dual-motor powertrain according to claim 2, characterized in that: Each of the reducers further comprises an input wheel and an intermediate wheel, wherein the input wheel is used for transmission connection with a motor shaft of the driving motor, and the intermediate wheel is used for transmission connection with the input wheel and the output wheel, wherein: Another portion of the one accommodating groove is recessed in a radial direction of the dual-motor powertrain toward the one input wheel and the one intermediate wheel of the two reducers.

4. The dual-motor powertrain according to claim 1, characterized in that: The intermediate housing also includes two circumferential plates, which are spaced apart circumferentially along the dual-motor powertrain. Each of the circumferential plates is fixedly connected to the outer sides of the groove walls of the two reducer accommodating grooves. The two circumferential plates are used to enclose the outer sides of the groove walls of the two reducer accommodating grooves to form the one accommodating groove.

5. The dual-motor powertrain according to claim 4, characterized in that: The groove bottom of each of the reducer receiving grooves includes a plurality of bearing grooves, each of which is used to fix one of the bearings, wherein: The groove depth of each of the reducer accommodating grooves along the axial direction of the dual-motor powertrain is greater than the groove depth of each of the bearing grooves of each of the reducer accommodating grooves.

6. The dual-motor powertrain according to claim 4, characterized in that: One of the circumferential plates includes two DC mounting holes, and the two DC mounting holes are used to fix a DC connector, and the DC connector is used to electrically connect the electrical component and the positive and negative electrodes of the power battery.

7. The dual-motor powertrain according to claim 4, characterized in that: The one accommodating groove is also used to accommodate a control single board, and the other circumferential plate includes a communication mounting hole, and the communication mounting hole is used to fix a communication connector, and the communication connector is used to transmit a control signal to the one control single board.

8. The dual-motor powertrain according to claim 4, characterized in that: The groove wall of each reducer receiving groove includes a first power hole and a first communication hole, and each reducer receiving groove is connected to the receiving groove through the first power hole and the first communication hole, wherein: Each of the first power holes is used to pass through a power connector, and the power connector is used to electrically connect the one electrical component and the one motor controller; Each of the first communication holes is used to pass through a communication connector, and the communication connector is used to transmit a control signal between the control board and the motor controller.

9. The dual-motor powertrain according to claim 8, characterized in that: The intermediate housing further comprises a partition plate, the partition plate being used to separate the accommodating slot into two sub-slots, one of the sub-slots being used to accommodate the electrical component, and the other sub-slot being used to accommodate a control board, wherein: One first power hole and one first communication hole in the groove wall of each reducer accommodating groove are respectively arranged on both sides of one partition plate.

10. The dual-motor powertrain according to any one of claims 1 to 9, characterized in that: The overall housing of the dual-motor powertrain further comprises two integrated housings, each of which comprises a motor housing, a reducer housing and a connecting plate, each of which is used to accommodate a stator and a rotor of a driving motor, each of which is used to enclose a reducer accommodating cavity with a reducer accommodating groove of an intermediate housing, and each of which is used to accommodate a parallel shaft assembly of a reducer, wherein: The connecting plate is fixed to the outer peripheral wall of the motor housing and the outer wall of the reducer housing. The connecting plate is used to enclose the motor housing and the reducer housing to form an electric control slot, and each electric control slot is used to accommodate a functional component of the motor controller.

11. The dual-motor powertrain according to claim 10, characterized in that: The length of the electric control slot along the axis of the dual-motor powertrain is less than the length of the motor housing, and the length of the electric control slot along the parallel axis arrangement direction of the reducer is less than the length of the reducer housing.

12. The dual-motor powertrain according to claim 10, characterized in that: Part of the outer peripheral wall of the motor housing and part of the outer wall of the reducer housing respectively constitute the two slot walls of the electric control slot, the connecting plate includes a bottom plate and two side plates, the two side plates are the other two slot walls of the electric control slot, and the bottom plate and another part of the outer wall of the reducer housing constitute the slot bottom of the electric control slot.

13. The dual-motor powertrain according to claim 12, characterized in that: One of the side plates is arranged opposite to the portion of the outer wall of the one reducer housing along the axial direction of the dual-motor powertrain, and the other side plate is opposite to the portion of the outer peripheral wall of the one motor housing, wherein: The length of the other side plate along the axis of the dual-motor powertrain is shorter than the length of the one motor housing; The length of the one side plate along the arrangement direction of the other side plate and the partial outer peripheral wall of the one motor housing is smaller than the length of the one reducer housing.

14. The dual-motor powertrain according to claim 10, characterized in that: Each of the integrated housings comprises a second power hole and a second communication hole, wherein the second power hole and the second communication hole are used to connect the electric control slot, the second power hole is used to accommodate a power connector between the electric component and a bus capacitor in the motor controller, and the second communication hole is used to accommodate a communication connector between a control board accommodated in the accommodating slot and a circuit board in the motor controller, wherein: The one second power hole and the one second communication hole of each integrated housing penetrate through a slot wall of the one electric control slot of each integrated housing along the axis of the dual-motor powertrain; The openings of the second power hole and the second communication hole along the axis of the dual-motor powertrain are oriented toward the intermediate housing.

15. An electric vehicle, characterized in that: The electric vehicle includes a frame, a power battery and a dual-motor powertrain as described in any one of claims 1-14, the frame is used to fix the power battery and the dual-motor powertrain, the power battery is used to electrically connect one electrical component of the dual-motor powertrain, and each of the drive motors is used to drive a wheel through one of the reducers.

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