Dual-motor power assembly and electric vehicle

Abstract

The invention provides a dual-motor power assembly and an electric vehicle, a main shell of the dual-motor power assembly comprises two integrated shells and a middle shell, and speed reducer shells of the two integrated shells are fixed to the two side faces of the middle shell respectively. A dual-motor controller of the dual-motor power assembly comprises an electrical assembly and two power modules, a middle shell comprises a containing groove, the containing groove is recessed towards a gap between two speed reducers, the containing groove is used for containing the electrical assembly, the gap between the shells of the two speed reducers is fully utilized, and the power modules are arranged in the containing groove. The connecting plate of each integrated shell is used for enclosing part of the peripheral wall of the motor shell and part of the outer wall of the speed reducer shell of the integrated shell to form an electric control groove, each electric control groove is used for containing one power module, part of the motor shell and part of the speed reducer shell are reused to form the electric control groove, the structure of the integrated shell is more compact and stable, and the service life of the integrated shell is prolonged. And the space between the speed reducer shell and the motor shell is fully utilized, so that the size of the dual-motor power assembly is favorably reduced.

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] Dual-motor drive technology uses two drive motors to independently control the left and right wheels to achieve high-precision torque vector output. The two drive motors require two motor controllers to control, which makes the dual-motor powertrain large in size, making it difficult to adapt to the different front and rear drive layout spaces of 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 large volume of dual-motor controllers in the dual-motor powertrain, so as to reduce 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, two reducers and a dual-motor controller. 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 two integrated housings and an intermediate housing. Each integrated housing includes a motor housing, a reducer housing and a connecting plate. Each motor housing is used to fix a stator of a drive motor and accommodate a rotor of a drive motor. Each reducer housing is used to accommodate a gear shaft assembly of a reducer. A reducer housing of the two integrated housings is respectively fixed to two sides of an intermediate housing. Among them, a dual-motor controller includes an electrical component and two power modules. An electrical component is used to receive direct current output by a power battery and to transmit direct current to two power modules respectively. Each power module is used to transmit alternating current to a drive motor. An intermediate housing includes a receiving groove, a receiving groove is recessed toward the gap between the two reducers, and a receiving groove is used to accommodate an electrical component. Each connecting plate is used to enclose a portion of the outer peripheral wall of a motor housing of an integrated housing and a portion of the outer wall of a reducer housing to form an electric control slot, and each electric control slot is used to accommodate a power module.

[0005] In the embodiment of the present application, the intermediate housing includes a receiving groove, which is recessed toward the gap between the two reducers, so that the gap between the two reducers can be fully utilized, and the electrical components of the dual-motor controller are received in the receiving groove, so that the electrical components of the dual-motor controller and the gear components of the reducer are arranged more compactly, thereby making the layout between the components of the dual-motor powertrain more compact, which is conducive to reducing the overall volume of the dual-motor powertrain. The electrical components are received in the receiving groove of the intermediate housing, which can reduce the number of electrical components of the dual-motor controller arranged in the electrical control groove, and reduce the space of the electrical control groove for accommodating other parts of the dual-motor controller except the electrical components, thereby reducing the volume of the electrical control groove, and further reducing the volume of the dual-motor powertrain.

[0006] In the embodiment of the present application, each connecting plate is used to enclose a portion of the outer peripheral wall of the motor housing and a portion of the outer wall of the reducer housing of an integrated housing to form an electric control slot, and the electric control slot reuses a portion of the outer peripheral wall of the motor housing and a portion of the outer wall of the reducer housing in the integrated housing, so that the motor housing, the reducer housing, and the electric control slot are more integrated, the integrated housing is more integrated, the structure is more compact and the strength is higher, the volume of the integrated housing can be reduced, and the overall strength of the dual-motor powertrain can be improved. Each connecting plate is used to enclose a portion of the outer peripheral wall of the motor housing and a portion of the outer wall of the reducer housing of an integrated housing to form an electric control slot, and the gap space between the motor housing and the reducer housing is fully utilized, so that the overall housing of the dual-motor powertrain is more integrated and compact, which is conducive to reducing the overall volume of the dual-motor powertrain and optimizing the overall layout of the dual-motor powertrain in the vehicle.

[0007] In the embodiment of the present application, the electrical component is used to receive the DC power output by the power battery and to deliver DC power to two power modules respectively, each power module is used to deliver AC power to a drive motor, and each electric control slot is used to accommodate a power module, so that the electrical component accommodated in the accommodating slot of the intermediate housing can be electrically connected to the power module in the electric control slot of each integrated housing with a shorter cable, making the layout of the dual-motor controller more regular. It also allows each power module to convert the DC power delivered by the electrical component into AC power with a shorter path and deliver it to the drive motor in the motor housing more quickly, reducing the power loss of the dual-motor powertrain.

[0008] In the embodiment of the present application, the intermediate housing can use the gap between the two reducers in the two reducer housings to form a receiving groove, and place the electrical components of the dual-motor controller in the receiving groove, thereby reducing the space requirements for arranging the electrical components of the dual-motor controller in the two electric control grooves. The electric control groove is composed of part of the outer peripheral wall of the motor housing of the reused integrated housing and part of the outer wall of the reducer housing and the connecting plate, which not only improves the integration and structural strength of the integrated housing, but also makes full use of the space between the reducer housing and the motor housing, so that the arrangement of the electric control groove does not occupy the axial space of the motor housing and the radial space of the reducer housing, thereby reducing the volume of the dual-motor powertrain.

[0009] In one embodiment, the orientation of the slot opening of each electric control slot is the same as the orientation of the slot opening of one receiving slot.

[0010] In the embodiment of the present application, the notch orientation of each electric control slot is the same as the notch orientation of the receiving slot, which is conducive to installing the electrical components and the two power modules in the receiving slot of the intermediate shell and the electric control slot of the integrated shell from the same direction, simplifying the assembly process and facilitating the maintenance and replacement of components in the dual-motor controller.

[0011] In one embodiment, the notch of each electric control slot is flush with the notch of the receiving slot, and the overall housing of the dual-motor powertrain further includes two electric control covers and an intermediate cover, and the two electric control covers and the intermediate cover are used to cover the notches of the two electric control slots and the notch of the receiving slot, respectively. In the embodiment of the present application, the notch of each electric control slot is flush with the notch of the receiving slot, so that the arrangement between the intermediate housing and the two integrated housings is more regular, and it is also convenient for the two electric control covers and the intermediate cover to cover the notches of the two electric control slots and the notch of the receiving slot, respectively, and it is also beneficial to prevent the electric control slot from occupying too much space in the height direction of the dual-motor powertrain, which is beneficial to reduce the volume of the overall housing of the dual-motor powertrain and optimize the layout of the dual-motor powertrain in the vehicle.

[0012] In one embodiment, an intermediate housing includes two first power holes, a portion of the outer wall of each reducer housing includes a second power hole, the two first power holes are connected to a receiving slot, and a second power hole of each reducer housing is connected to an electric control slot. Wherein, along the axial direction of the dual-motor powertrain, a first power hole is used to align with a second power hole, and the aligned first power hole and second power hole are used to pass through a power connector, and a power connector is used to electrically connect an electrical component and a power module.

[0013] In the embodiment of the present application, a portion of the outer wall of each reducer housing includes a second power hole, so that the power connector can be installed on a portion of the outer wall of the reducer housing. The two first power holes are connected to the receiving slot, and the second power hole of each reducer housing is connected to an electric control slot, so that the electrical components in the receiving slot can be electrically connected to the power module in each electric control slot through the power connector installed in the first power hole and the second power hole, and the DC power received by the electrical components from the power battery is transmitted to the power module through the power connector.

[0014] The two first power holes are connected to the accommodating slots, and the second power holes of each reducer housing are connected to an electric control slot. The cables connecting the power connectors to the electrical components and the power modules can be arranged in the intermediate housing and the integrated housing, without the need to arrange additional cables outside the overall housing of the dual-motor powertrain, which is conducive to simplifying the cable arrangement of the dual-motor powertrain.

[0015] In the embodiment of the present application, the first power hole along the axial direction of the dual-motor powertrain is used to align the second power hole, so as to facilitate the power connector to pass through the first power hole and the second power hole, and also to achieve the electrical connection between the electrical components in the receiving slot and the power module in the electric control slot with the shortest cable. The alignment of the first power hole and the second power hole along the axial direction of the dual-motor powertrain also makes the openings on the overall housing of the dual-motor powertrain more regular.

[0016] In one embodiment, a dual-motor controller further includes a control board and two circuit boards, a receiving slot is also used to receive a control board, each electric control slot is also used to receive a circuit board, an intermediate housing includes two first communication holes, a portion of the outer wall of each reducer housing includes a second communication hole, the two first communication holes are connected to a receiving slot, and a second communication hole of each reducer housing is connected to an electric control slot. In which, along the axial direction of the dual-motor powertrain, a first communication hole is used to align with a second communication hole, and the aligned first communication hole and second communication hole are used to pass through a communication connector, and a communication connector is used to electrically connect a control board and a circuit board.

[0017] In the embodiment of the present application, the first communication hole along the axial direction of the dual-motor powertrain is used to align the second communication hole, so that the communication connector can pass through the first communication hole and the second communication hole, and the electrical connection between the control board in the accommodating slot and the circuit board in the electric control slot can be realized with the shortest cable. The alignment of the first communication hole and the second communication hole along the axial direction of the dual-motor powertrain also makes the openings on the overall housing of the dual-motor powertrain more regular.

[0018] In one embodiment, each side of the intermediate housing further includes two first mounting surfaces, each first mounting surface surrounds the outer periphery of the opening of a reducer housing, two first power holes along the axial direction of the dual-motor powertrain respectively penetrate the two first mounting surfaces, and two first communication holes along the axial direction of the dual-motor powertrain respectively penetrate the two first mounting surfaces. The outer wall of each reducer housing further includes a second mounting surface, the second mounting surface surrounds the outer periphery of the reducer receiving slot, each second mounting surface is used to fix a first mounting surface, the second power hole along the axial direction of the dual-motor powertrain penetrates the second mounting surface, and the second communication hole along the axial direction of the dual-motor powertrain penetrates the second mounting surface. By forming the first power hole and the second power hole on the first mounting surface and the second mounting surface respectively, and the first communication hole and the second communication hole on the first mounting surface and the second mounting surface respectively, the power connectors accommodated by the first power hole and the second power hole and the communication connectors accommodated by the first communication hole and the second communication hole can avoid the gear shaft assembly of the reducer in the reducer receiving slot from rotating and being damaged, thereby improving the electrical safety of the dual-motor powertrain and making the line layout more regular.

[0019] In one embodiment, a dual-motor controller also includes two groups of output copper bars, each group of output copper bars includes three output copper bars, and the three output copper bars are used to electrically connect a power module and a stator winding of a drive motor. A portion of the outer wall of each reducer housing includes a group of three-connected through holes, and each group of three-connected through holes includes at least one three-connected through hole, and each group of three-connected through holes is used to pass through a group of output copper bars.

[0020] In an embodiment of the present application, a portion of the outer wall of each reducer housing includes a group of three-connected through holes, and each group of three-connected through holes is used to pass a group of output copper bars, so that the two power modules connected to a group of output copper bars in the two electric control slots can be symmetrically arranged along the axial direction of the dual-motor powertrain toward one side of the intermediate housing, so that the dual-motor controller is arranged more regularly, which is conducive to reducing the volume of the dual-motor controller, and then reducing the volume of the dual-motor powertrain, and optimizing the layout of the dual-motor powertrain in the whole vehicle.

[0021] In an embodiment of the present application, a portion of the outer wall of each reducer housing includes a group of three-connected through holes, and each group of three-connected through holes is used to pass through a group of output copper bars, so that the alternating current transmitted from the power module in each electric control slot to a group of output copper bars can be directly transmitted to the stator winding of the drive motor through a portion of the outer wall of each reducer housing, without the need to additionally arrange an outer shell for accommodating the three output copper bars outside the overall housing of the dual-motor powertrain, thereby making the arrangement of components in the dual-motor powertrain more compact and the space utilization more efficient, which is conducive to reducing the overall volume of the overall housing of the dual-motor powertrain.

[0022] In an embodiment of the present application, a portion of the outer wall of each reducer housing includes a group of three-connected through holes, and each group of three-connected through holes is used to pass a group of output copper bars. This also shortens the transmission path of the alternating current transmitted from the power module to the stator winding of the drive motor through a group of output copper bars, which is beneficial to reducing power loss and improving the efficiency of the dual-motor powertrain.

[0023] In one embodiment, a dual-motor controller also includes two groups of output copper bars, each group of output copper bars includes three output copper bars, the three output copper bars are used to electrically connect a power module and a stator winding of a drive motor, each connecting plate includes a group of three-connected through holes, each group of three-connected through holes includes at least one three-connected through hole, and each group of three-connected through holes is used to pass through a group of output copper bars.

[0024] In an embodiment of the present application, each connecting plate includes a group of three connected through holes, and each group of three connected through holes is used to pass a group of output copper bars, and the connecting plates constituting the electric control slots are arranged on both sides of the two reducer housings, so that the power modules connected to a group of output copper bars in the two electric control slots can be arranged symmetrically outward along the axial direction of the dual-motor powertrain away from the intermediate housing, so that the dual-motor controller is arranged more regularly, which is conducive to reducing the volume of the dual-motor controller, and then reducing the volume of the dual-motor powertrain, and optimizing the layout of the dual-motor powertrain in the whole vehicle.

[0025] In an embodiment of the present application, each connecting plate includes a group of three-connected through holes, and each group of three-connected through holes is used to pass a group of output copper bars, so that the alternating current transmitted from the power module in each electric control slot to a group of output copper bars can be directly transmitted to the stator winding of the drive motor through each connecting plate, so that the arrangement of a group of output copper bars can make full use of the gap space between the motor housing and the reducer housing under the bottom of each electric control slot, without excessively occupying the axial dimension of the motor housing and the radial dimension of the reducer housing in the overall housing of the dual-motor powertrain, which is conducive to reducing the volume of the dual-motor powertrain.

[0026] In one embodiment, a dual-motor controller also includes two groups of output copper bars, each group of output copper bars includes three output copper bars, and the three output copper bars are used to electrically connect a power module and a stator winding of a drive motor. A partial outer wall of a reducer housing of an integrated housing includes a group of three-connected through holes, and a connecting plate of another integrated housing includes another group of three-connected through holes, each group of three-connected through holes includes at least one three-connected through hole, and each group of three-connected through holes is used to pass a group of output copper bars.

[0027] In an embodiment of the present application, a portion of the outer wall of the reducer housing of an integrated housing includes a group of three-connected through holes, each group of three-connected through holes is used to pass through a group of output copper bars so that the alternating current transmitted from the power module in the electric control slot of an integrated housing to a group of output copper bars can be directly transmitted through the portion of the outer wall of the reducer housing to the stator winding of the drive motor, without the need to arrange an additional shell for accommodating a group of output copper bars outside the total housing of the dual-motor powertrain, so that the arrangement of the components in the dual-motor powertrain is more compact, the space utilization rate is higher, and it is beneficial to reduce the overall volume of the total housing of the dual-motor powertrain. The connecting plate of another integrated housing includes another group of three-connected through holes, each group of three-connected through holes is used to pass through a group of output copper bars, so that the alternating current transmitted from the power module in the electric control slot of another integrated housing to another group of output copper bars can be directly transmitted through the connecting plate to the stator winding of the drive motor, so that the arrangement of the other group of output copper bars can make full use of the gap space between the motor housing and the reducer housing below the bottom of the electric control slot, without occupying too much of the axial dimension and radial dimension of the dual-motor powertrain, which is beneficial to reduce the volume of the dual-motor powertrain.

[0028] In an embodiment of the present application, a portion of the outer wall of the reducer housing of an integrated housing includes a group of three connected through holes, and the connecting plate of another integrated housing includes another group of three connected through holes, so that the power module in the electric control slot of one integrated housing can be arranged axially toward the intermediate housing along the dual-motor powertrain, and the power module in the electric control slot of the other integrated housing can be arranged axially away from the intermediate housing along the dual-motor powertrain, so that the two power modules of the dual-motor controller are arranged axially translationally along the dual-motor powertrain, so that the dual-motor controller is arranged more regularly, which is conducive to reducing the volume of the dual-motor controller, and then reducing the volume of the dual-motor powertrain, and optimizing the layout of the dual-motor powertrain in the whole vehicle.

[0029] In one embodiment, each group of three-connected through holes includes three three-connected through holes, and the three three-connected through holes are respectively used to pass through the three output copper bars of each group of output copper bars, wherein the arrangement direction of the three three-connected through holes intersects with the axial direction of the dual-motor powertrain, or the three three-connected through holes are arranged at intervals along the axial direction of the dual-motor powertrain.

[0030] In an embodiment of the present application, three three-connected through holes are respectively used to pass through the three output copper bars of each group of output copper bars, and the arrangement direction of the three three-connected through holes intersects with the axial direction of the dual-motor powertrain, so that the width direction of the power module connected to the three output copper bars passing through the three three-connected through holes is arranged in the same axial direction as the dual-motor powertrain, and the length direction of the power module can better utilize the space on the outer wall of the reducer housing for arrangement, so that the axial dimension of the dual-motor controller is smaller.

[0031] In one embodiment, the arrangement direction of the three three-way connecting holes is the same as the arrangement direction of the connecting plate and the motor housing.

[0032] In an embodiment of the present application, three three-connected through holes are arranged at intervals along the axial direction of the dual-motor powertrain, so that the length direction of the power module connected to the three output copper bars passing through the three three-connected through holes can be arranged in the same axial direction as the dual-motor powertrain, which can make full use of the space along the axial direction of the dual-motor powertrain, so that the space occupied by the dual-motor controller perpendicular to the axial direction of the dual-motor powertrain is smaller.

[0033] In one embodiment, the first power hole and the second power hole are also used to accommodate a communication cable, the communication cable is used to pass through the two first power holes of the intermediate shell and the second power holes of the two integrated shells, the communication cable is used to connect the two circuit boards of the dual motor controller, and the communication cable is used to achieve communication between the two circuit boards. The electric control slot is also used to accommodate a shielding cover, the shielding cover is used to cover part of the power connector between the first power hole and the second power hole and the power module. Since the power connector is used to transmit high-voltage direct current, and the communication cable accommodated by the first power hole and the second power hole has the same arrangement path as the part of the power connector, a shielding cover is provided to cover the part of the power connector between the first power hole and the second power hole and the power module to achieve isolation between the power connector and the communication cable.

[0034] In one embodiment, a portion of the outer 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 respectively the other two slot walls of an electric control slot, a bottom plate and another portion of the outer wall of a reducer housing constitute the slot bottom of an electric control slot. A side plate and a portion of the outer wall of a reducer housing are arranged opposite to each other along the axial direction of the dual-motor powertrain, and the other side plate is opposite to a portion of the outer wall of a motor housing.

[0035] In the embodiment of the present application, part of the outer 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, and the two groove walls of the electric control groove reuse part of the outer wall of the motor housing and part of the outer wall of the reducer housing, so that the integration degree between the electric control groove, the motor housing, and the reducer housing of the integrated housing is higher, and the integration degree of the integrated housing is higher and the strength is stronger, which is conducive to improving the overall structural strength of the total housing of the dual-motor powertrain. The bottom plate and another part of the outer wall of the reducer housing constitute the groove bottom of the electric control groove, so that the groove bottom of the electric control groove reuses another part of the outer wall of the reducer housing, so that the integration degree of the integrated housing is further improved and the structural strength is also stronger.

[0036] In the embodiment of the present application, one side plate is arranged opposite to a part of the outer wall of the reducer housing along the axial direction of the dual-motor powertrain, and the other side plate is opposite to a part of the outer peripheral wall of the motor housing, so that the bottom of the electric control slot and the other two slot walls fully utilize the gap space between the motor housing and the reducer housing, which is conducive to a more compact layout and smaller volume of the dual-motor powertrain. It also makes the arrangement of one side plate not to occupy additional space of the reducer housing along the axial direction perpendicular to the dual-motor powertrain, and the arrangement of the other side plate does not occupy additional space of the motor housing along the axial direction of the dual-motor powertrain, so that the arrangement of the electric control slot does not occupy too much of the axial and radial dimensions of the dual-motor powertrain, which is conducive to reducing the volume of the dual-motor powertrain and facilitating the layout of the dual-motor powertrain in the vehicle.

[0037] In one embodiment, a portion of the outer wall of the motor housing includes a fixing protrusion, and a portion of the outer wall of the reducer housing includes another fixing protrusion. One fixing protrusion and the other fixing protrusion are used to form a notch of the electric control slot with two side plates of the connecting plate. One fixing protrusion and the other fixing protrusion are flush with the two side plates and the end faces facing away from the bottom plate, so that the notch of the electric control slot is flush, which is conducive to the covering of the notch of the electric control slot with the electric control cover plate.

[0038] In one embodiment, the length of the other side plate along the axis of the dual-motor powertrain is less than or equal to the sum of the lengths of a motor housing and a reducer housing connected thereto. The length of the side plate along the arrangement direction of the other side plate and a portion of the outer peripheral wall of a motor housing is less than the length of a reducer housing.

[0039] 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 or equal to the sum of the lengths of the motor housing and the reducer housing connected thereto, so that the arrangement of the other side plate will not occupy additional axial space outside the axial direction of the motor housing and the reducer housing along the axis of the dual-motor powertrain, thereby making it possible for the arrangement of the electric control slot to not occupy additional axial space outside the axial direction of the motor housing and the reducer housing along the axis of the dual-motor powertrain, which is beneficial to reducing the volume of the integrated housing and the overall housing of the dual-motor powertrain.

[0040] 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 arrangement of one side plate will not occupy additional space of the reducer housing 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 integrated housing and the overall housing of the dual-motor powertrain.

[0041] In one embodiment, the length of one side panel is smaller than the length of the other side panel, or the length of one side panel is larger than the length of the other side panel.

[0042] In the embodiment of the present application, the length of one side plate is less than the length of the other side plate, so that the length direction of the electric control slot is the same as the axial direction of the dual-motor powertrain, which is conducive to arranging the three three-way through holes in the electric control slot along the axial direction of the dual-motor powertrain, and the three three-way through holes are used to pass through the three output copper bars, so that the three output copper bars are arranged along the axial direction of the dual-motor powertrain, and the three output copper bars are electrically connected to the power module, so that the length direction of the power module in the electric control slot can be arranged along the axial direction of the dual-motor powertrain, so that the power module makes full use of the space in the electric control slot, so that the electric control slot has a smaller volume along the arrangement direction of the other side plate and the part of the outer peripheral wall of the motor housing, thereby reducing the volume of the dual-motor powertrain. In the embodiment of the present application, the length of one side plate is less than the length of the other side plate, so that the length direction of the electric control slot is the same as the axial direction of the dual-motor powertrain, providing a dual-motor powertrain with a variety of electric control slot layouts, and also conducive to increasing the installation compatibility of the dual-motor powertrain and the electric vehicle.

[0043] In the embodiment of the present application, the length of one side plate is greater than the length of the other side plate, so that the length direction of the electric control slot is the same as the arrangement direction of the other side plate and the part of the outer peripheral wall of the motor housing, which is conducive to arranging the three three-way through holes in the electric control slot along the arrangement direction of the other side plate and the part of the outer peripheral wall of the motor housing at intervals, and the three three-way through holes are used to pass through the three output copper bars, so that the three output copper bars are arranged along the arrangement direction of the other side plate and the part of the outer peripheral wall of the motor housing at intervals, and the three output copper bars are electrically connected to the power module, so that the length direction of the power module in the electric control slot can be arranged along the arrangement direction of the other side plate and the part of the outer peripheral wall of the motor housing, so that the power module makes full use of the space in the electric control slot, so that the electric control slot has a smaller volume along the axial direction of the dual-motor powertrain, thereby reducing the volume of the dual-motor powertrain. In the embodiment of the present application, the length of one side plate is less than the length of the other side plate, so that the width direction of the electric control slot is the same as the axial direction of the dual-motor powertrain, providing a dual-motor powertrain with a variety of electric control slot layouts, and also conducive to increasing the installation compatibility of the dual-motor powertrain and the electric vehicle.

[0044] In one embodiment, two side surfaces of an intermediate housing 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 enclose a reducer cavity with a reducer housing of an integrated housing, and each reducer cavity is used to accommodate a gear shaft assembly of a reducer. Each reducer includes an output wheel, the radius of an output wheel of each reducer is greater than the radius of any other gear of each reducer, an output wheel is used to drive and connect wheels, each reducer receiving groove is used to accommodate at least part of an output wheel, and a part of a receiving groove is recessed toward the gap between an output wheel of two reducers.

[0045] In an embodiment of the present application, the notches of the two reducer accommodating grooves are opposite to each other along the axial direction of the dual-motor powertrain, and each reducer accommodating groove is used to enclose a reducer cavity with the reducer housing of the integrated housing, and each reducer cavity is used to accommodate the gear shaft assembly of the reducer, so that the gear shaft assemblies of the two reducers of the dual-motor powertrain can work independently without interfering with each other, which is conducive to the normal operation of the dual-motor powertrain.

[0046] In the embodiment of the present application, each reducer includes an output wheel, the radius of the output wheel of each reducer is larger than the radius of any other gear of each reducer, and a part of the receiving 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 receiving groove, making the arrangement of the parts of the dual-motor powertrain more compact and improving the integration of the dual-motor powertrain. It is also beneficial to make the receiving groove have a larger space to accommodate electrical components, so that the electrical components and control boards in the dual-motor controller can be placed in the receiving groove, which is beneficial to reducing the volume of the two electric control grooves of the dual-motor controller, reducing the overall volume of the dual-motor powertrain, and facilitating the layout of the dual-motor powertrain in the vehicle.

[0047] 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.

[0048] 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 more space for accommodating electrical components and control boards, which is more conducive to reducing the volume of the two electronic control slots of the dual-motor controller, reducing the overall volume of the dual-motor powertrain, and facilitating the layout of the dual-motor powertrain in the whole vehicle.

[0049] In one embodiment, an intermediate shell also includes two circumferential plates, which are distributed at intervals along the circumference of the dual-motor powertrain, and each circumferential plate is fixedly connected to the outer sides of the groove walls of 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.

[0050] In an 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 sides of the groove walls of the two reducer accommodating grooves, so that the groove walls of the two reducer accommodating grooves can be reused to form an accommodating groove, thereby making full use of the space of the two reducer accommodating grooves along the radial direction of the dual-motor powertrain, so that the accommodating grooves will not increase the space of the dual-motor powertrain along the radial direction of the dual-motor powertrain, and the accommodating grooves can accommodate electrical components and control boards, thereby saving the space of the two electric control grooves of the dual-motor controller originally occupied by the electrical components and control boards in the accommodating grooves, making the volume of the two electric control grooves smaller, thereby reducing the overall volume of the dual-motor powertrain and optimizing the overall vehicle layout.

[0051] 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.

[0052] 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 electronic control groove of the dual-motor controller, and thereby reducing the overall volume of the dual-motor powertrain.

[0053] In one embodiment, a circumferential plate 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.

[0054] 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 dual-motor controller of the two drive motors.

[0055] 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 with the electrical components in the receiving slot.

[0056] In one embodiment, another 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 control signals to the control board.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] In one embodiment, the intermediate housing further includes a partition plate, which is used to separate the receiving slot into two sub-slots, one sub-slot is used to receive the electrical component, and the other sub-slot is used to receive the control board. The first power hole and the first communication hole in the slot wall of each reducer receiving slot are arranged on both sides of the partition plate respectively.

[0062] 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 the electrical components in one sub-slot will not affect the signal transmission quality of the control board in another sub-slot.

[0063] 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 power module. 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 circuit board. The second power hole and the second 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, which is conducive to the normal operation of the dual-motor powertrain.

[0064] 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.

[0065] In the dual-motor powertrain in the embodiment of the present application, the reducer housing that accommodates the reducer is fixed to the two sides of the intermediate housing respectively, so that the intermediate housing can use the gap between the two reducers to form a receiving groove, and the electrical components of the dual-motor controller are accommodated in the receiving groove, thereby reducing the space for arranging the electrical components of the dual-motor controller in the two electric control grooves. The part of the outer peripheral wall of the motor housing of an integrated housing and the part of the outer wall of the reducer housing are reused with a connecting plate to form an electric control groove, and the space between the reducer housing and the motor housing is used to accommodate the power module of the dual-motor controller. In this application, the electrical components of the dual-motor controller are accommodated by the receiving groove of the intermediate housing, and the two power modules are respectively accommodated by the two electric control grooves, and the gap between the two reducers and the space between the motor housing and the reducer housing are fully utilized to accommodate the components of the dual-motor controller, which can not only improve the integration and structural strength of the total housing of the dual-motor powertrain, but also make the dual-motor powertrain more integrated and compact, thereby reducing the volume of the dual-motor powertrain and optimizing the layout of the dual-motor powertrain in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] 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.

[0067] Figure 1 is a schematic diagram of an electric vehicle provided in an embodiment of the present application;

[0068] Figure 2 is a schematic diagram of a dual-motor powertrain provided in an embodiment of the present application;

[0069] Figure 3 is another schematic diagram of a dual-motor powertrain provided in an embodiment of the present application;

[0070] Figure 4 is another schematic diagram of a dual-motor powertrain provided in an embodiment of the present application;

[0071] Figure 5 is a schematic diagram of an integrated housing provided in an embodiment of the present application;

[0072] Figure 6 is a schematic diagram of an intermediate housing provided in an embodiment of the present application;

[0073] Figure 7 is another schematic diagram of a dual-motor powertrain provided in an embodiment of the present application;

[0074] Figure 8 This is a schematic diagram of a bus capacitor, a power module and a circuit board provided in an embodiment of the present application;

[0075] Fig. 9 is another schematic diagram of an integrated housing provided in an embodiment of the present application;

[0076] Fig.10 is another schematic diagram of an integrated housing provided in an embodiment of the present application;

[0077] Fig.11 is a schematic diagram of the overall housing of the dual-motor powertrain provided in an embodiment of the present application;

[0078] Fig.12 is another schematic diagram of an integrated housing provided in an embodiment of the present application;

[0079] Fig.13 is another schematic diagram of the overall housing of the dual-motor powertrain provided in an embodiment of the present application;

[0080] Fig.14 is another schematic diagram of the overall housing of the dual-motor powertrain provided in an embodiment of the present application;

[0081] Fig.15 is another schematic diagram of the overall housing of the dual-motor powertrain provided in an embodiment of the present application;

[0082] Fig.16 is another schematic diagram of the overall housing of the dual-motor powertrain provided in an embodiment of the present application;

[0083] Fig.17 yes Figure 7 A partial enlarged view of the M1 part of the dual-motor powertrain;

[0084] Fig.18 is a schematic diagram of a shielding cover provided in an embodiment of the present application;

[0085] Fig.19is a partial cross-sectional view of the shielding cover and the power connector provided in the embodiment of the present application;

[0086] Fig. 20 is another schematic diagram of a dual-motor powertrain provided in an embodiment of the present application;

[0087] Fig.21 is another schematic diagram of an integrated housing provided in an embodiment of the present application;

[0088] Fig. 22 This is a schematic diagram of an intermediate housing and a gear shaft assembly of a reducer provided in an embodiment of the present application;

[0089] Fig.23 This is a cross-sectional view of the intermediate housing and the gear shaft assembly of the reducer provided in an embodiment of the present application;

[0090] Fig.24 is another cross-sectional view of the intermediate housing and the gear shaft assembly of the reducer provided in an embodiment of the present application;

[0091] Fig.25 is another schematic diagram of an integrated housing provided in an embodiment of the present application;

[0092] Fig.26 is a cross-sectional view of an integrated housing provided in an embodiment of the present application;

[0093] Fig. 27 yes Fig.26 A partial enlarged view of the M2 part of the integrated shell. DETAILED DESCRIPTION

[0094] 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 of the embodiments.

[0095] For ease of understanding, the English abbreviations involved in the embodiments of the present application are first explained and described below.

[0096] NVH: It is the abbreviation of Noise, Vibration and Harshness, which refers to noise, vibration and acoustic roughness.

[0097] A dual-motor powertrain includes two drive motors, two reducers and a dual-motor controller. 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 two integrated housings and an intermediate housing. Each integrated housing includes a motor housing, a reducer housing and a connecting plate. Each motor housing is used to fix a stator of a drive motor and accommodate a rotor of a drive motor. Each reducer housing is used to accommodate a gear shaft assembly of a reducer. The reducer housings of the two integrated housings are respectively fixed to the two sides of the intermediate housing. Among them, the dual-motor controller includes an electrical component and two power modules. The electrical component is used to receive the direct current output by the power battery and to transmit direct current to the two power modules respectively. Each power module is used to transmit alternating current to a drive motor. The intermediate housing includes a receiving groove, which is recessed toward the gap between the two reducers. The receiving groove is used to accommodate the electrical component. Each connecting plate is used to enclose a portion of the outer peripheral wall of a motor housing of an integrated housing and a portion of the outer wall of a reducer housing to form an electric control groove, and each electric control groove is used to accommodate a power module.

[0098] In the present application, the reducer housing that accommodates the reducer is respectively fixed to the two sides of the intermediate housing, so that the intermediate housing can use the gap between the two reducers to form a receiving groove, and the electrical components of the dual motor controller can be accommodated in the receiving groove, thereby reducing the space for arranging the electrical components of the dual motor controller in the two electric control grooves. A part of the outer peripheral wall of the motor housing of an integrated housing and a part of the outer wall of the reducer housing are reused with a connecting plate to form an electric control groove, and the space between the reducer housing and the motor housing is used to accommodate the power module of the dual motor controller. In the present application, the electrical components of the dual motor controller are accommodated by the receiving groove of the intermediate housing, and the two electric control grooves are used to accommodate two power modules respectively, and the gap between the two reducers and the space between the motor housing and the reducer housing are fully utilized to accommodate the components of the dual motor controller, which can not only improve the integration and structural strength of the overall housing of the dual motor powertrain, but also make the dual motor powertrain more integrated and compact, thereby reducing the volume of the dual motor powertrain.

[0099] The dual-motor powertrain provided in the embodiment of the present application is applied to electric vehicles to improve the overall performance of the electric vehicles.

[0100] Figure 1 It is a schematic diagram of the electric vehicle 1 provided in an embodiment of the present application.

[0101] In one embodiment, the electric vehicle 1 includes a dual-motor powertrain 10, a frame 20, a power battery 30, and wheels 40. Figure 1As shown, the dual-motor powertrain 10 is fixed to the vehicle frame 20. The dual-motor powertrain 10 is used to receive power from the power battery 30 and to drive the wheels 40. In the embodiment of the present application, the power battery 30 may also be referred to as a battery pack. In the embodiment of the present application, the electric vehicle 1 refers to a wheeled device driven or towed by a power device.

[0102] Figure 2 is a schematic diagram of a dual-motor powertrain 10 provided in an embodiment of the present application, Figure 3 It is another schematic diagram of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0103] In one embodiment, if Figure 2 and Figure 3 As shown, the dual-motor powertrain 10 includes two drive motors 11 , two reducers 12 and a dual-motor controller 13 .

[0104] In the embodiment of the present application, the dual motor controller 13 is used to receive the direct current transmitted by the power battery 30. The dual motor controller 13 converts the high voltage direct current into alternating current and transmits 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, and the output shafts of the two reducers 12 are respectively connected to the two wheels 40 to drive the wheels 40 to move. In the embodiment of the present application, the drive motor 11 also includes a rotor and a stator. After receiving the alternating current, the stator drives the rotor to rotate, thereby driving the motor shaft to rotate.

[0105] Figure 4 It is another schematic diagram of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0106] In one embodiment, if Figure 4 As shown, the dual motor controller 13 includes two power modules 1301, two bus capacitors 1306 (such as Figure 8 As shown), two circuit boards 1302 and a control board 1303 and other electrical components.

[0107] In the embodiment of the present application, each power module 1301 is used to convert the direct current transmitted by the power battery 30 into alternating current, and transmit the alternating current to the stator winding of a drive motor 11. The control board 1303 is used to receive signals from the vehicle and transmit the signals to the two circuit boards 1302, and then control the current transmitted by the two power modules 1301 through the two circuit boards 1302, thereby controlling the operation of the two drive motors 11 and coordinating the driving of the wheels 40 on both sides of the vehicle.

[0108] In one embodiment, if Figure 4As shown, the overall housing 10a of the dual-motor powertrain 10 includes two motor housings 110 and two reducer housings 120. In the embodiment of the present application, the motor housing 110 is used to accommodate the stator, rotor and motor shaft of the drive motor 11, and the reducer housing 120 is used to accommodate the gear shaft assembly 12a of the reducer 12.

[0109] The dual-motor controller 13 for controlling the two drive motors 11 in the dual-motor powertrain includes multiple electrical components such as two power modules 1301, two bus capacitors 1306, two circuit boards 1302 and a control board 1303, so that the dual-motor controller 13 occupies a large space in the dual-motor powertrain 10, making the dual-motor powertrain 10 larger in size, thereby making it difficult for the dual-motor powertrain 10 to adapt to the different layout spaces of the front and rear drive of the vehicle.

[0110] In the present application, a receiving groove is formed in the overall housing of the dual-motor powertrain 10 by utilizing the gap between the two reducers 12, and some electrical components of the dual-motor controller 13 are placed in the receiving groove 220. An electric control groove 150 is formed by reusing parts of the motor housing 110 and the reducer housing 120. The two electric control grooves 150 are respectively used to accommodate two power modules 1301 of the dual-motor controller 13. The gap between the two reducers 13 and the space between the motor housing 110 and the reducer housing 120 are fully utilized to accommodate the components of the dual-motor controller 13. This can not only improve the integration and structural strength of the overall housing 10a of the dual-motor powertrain 10, but also make the dual-motor powertrain 10 more integrated and compact, thereby reducing the volume of the dual-motor powertrain 10.

[0111] The dual-motor powertrain 10 provided in an embodiment of the present application will be described in detail below.

[0112] Figure 5 is a schematic diagram of an integrated housing 100 provided in an embodiment of the present application. Figure 6 It is a schematic diagram of the intermediate housing 200 provided in an embodiment of the present application.

[0113] In one embodiment, a dual-motor powertrain 10 includes two drive motors 11, two reducers 12, and a dual-motor controller 13. Figure 3 As shown, along the axial direction O of the dual-motor powertrain 10, two reducers 12 are arranged between the two drive motors 11. The overall housing 10a of the dual-motor powertrain 10 includes two integrated housings 100 and an intermediate housing 200. Figure 5As shown, each integrated housing 100 includes a motor housing 110, a reducer housing 120 and a connecting plate 140. Each motor housing 110 is used to fix a stator of a driving motor 11 and accommodate a rotor of the driving motor 11. Each reducer housing 120 is used to accommodate a gear shaft assembly 12a of a reducer 12. Figure 4 and Figure 6 As shown, the reducer housings 120 of the two integrated housings 100 are respectively fixed to the two side surfaces 210 of the intermediate housing 200. Figure 4 As shown, the dual motor controller 13 includes an electrical component 1304 and two power modules 1301. The electrical component 1304 is used to receive the DC power output by the power battery 30 and to deliver DC power to the two power modules 1301 respectively. Each power module 1301 is used to deliver AC power to a drive motor 11. Figure 4 and Figure 6 As shown, the intermediate housing 200 includes a receiving groove 220, which is recessed toward the gap between the two reducers 12, and the receiving groove 220 is used to receive the electrical component 1304. Figure 5 As shown, each connecting plate 140 is used to enclose a portion of the outer peripheral wall 111 of the motor housing 110 of an integrated housing 100 and a portion of the outer wall 121 of the reducer housing 120 to form an electric control slot 150, as shown in FIG. Figure 4 As shown, each electric control slot 150 is used to accommodate a power module 1301 .

[0114] In the embodiment of the present application, the intermediate housing 200 includes a receiving groove 220, which is recessed toward the gap between the two reducers 12, so that the gap between the two reducers 12 can be fully utilized, and the electrical component 1304 of the dual-motor controller 13 is received in the receiving groove 220, so that the electrical component 1304 of the dual-motor controller 13 and the gear component of the reducer 12 are arranged more compactly, thereby making the layout between the components of the dual-motor powertrain 10 more compact, which is conducive to reducing the overall volume of the dual-motor powertrain 10. The electrical component 1304 is received in the receiving groove 220 of the intermediate housing 200, which can reduce the number of electrical components of the dual-motor controller 13 arranged in the electric control groove 150, and reduce the space of the electric control groove 150 for accommodating other parts of the dual-motor controller 13 except the electrical component 1304, thereby reducing the volume of the electric control groove 150, and further reducing the volume of the dual-motor powertrain 10.

[0115] In an embodiment of the present application, each connecting plate 140 is used to enclose a portion of the outer peripheral wall 111 of the motor housing 110 and a portion of the outer wall 121 of the reducer housing 120 of an integrated housing 100 to form an electric control groove 150. The electric control groove 150 reuses a portion of the outer peripheral wall 111 of the motor housing 110 and a portion of the outer wall 121 of the reducer housing 120 in the integrated housing 100, so that the motor housing 110, the reducer housing 120 and the electric control groove 150 are more integrated, the integrated housing 100 is more compact and the strength is higher, which can reduce the volume of the integrated housing 100 and improve the overall strength of the dual-motor powertrain 10. Each connecting plate 140 is used to enclose a portion of the outer peripheral wall 111 of the motor housing 110 and a portion of the outer wall 121 of the reducer housing 120 of an integrated housing 100 to form an electric control slot 150, and also fully utilizes the gap space between the motor housing 110 and the reducer housing 120, so that the overall housing 10a of the dual-motor powertrain 10 is more integrated and compact, which is conducive to reducing the overall volume of the dual-motor powertrain 10 and optimizing the overall layout of the dual-motor powertrain 10 in the vehicle. It also allows the motor housing 110, the reducer housing 120, and the electric control slot 150 to be integrally cast, which can enhance the strength of the overall housing 10a of the dual-motor powertrain 10, which is conducive to improving the NVH performance of the overall housing 10a of the dual-motor powertrain 10.

[0116] In the embodiment of the present application, the electrical component 1304 is used to receive the direct current output by the power battery 30 and to deliver direct current to the two power modules 1301 respectively. Each power module 1301 is used to deliver alternating current to a drive motor 11. Each electric control slot 150 is used to accommodate a power module 1301, so that the electrical component 1304 accommodated in the accommodating slot 220 of the intermediate housing 200 can be electrically connected to the power module 1301 in the electric control slot 150 of each integrated housing 100 with a shorter cable, so that the layout of the dual-motor controller 13 is more regular. It also allows each power module 1301 to convert the direct current delivered by the electrical component 1304 into alternating current with a shorter path and deliver it to the drive motor 11 in the motor housing 110 more quickly, reducing the power loss of the dual-motor powertrain 10.

[0117] In the embodiment of the present application, the reducer housings 120 of the two integrated housings 100 are respectively fixed to the two side surfaces 210 of the intermediate housing 200, so that the intermediate housing 200 can use the gap between the two reducers 12 in the two reducer housings 120 to form a receiving groove 220, and place the electrical components 1304 of the dual motor controller 13 in the receiving groove 220, thereby reducing the space requirements of the two electric control grooves 150 for arranging the electrical components of the dual motor controller 13. The electric control groove 150 is formed by reusing part of the outer peripheral wall 111 of the motor housing 110 of the integrated housing 100 and part of the outer wall 121 of the reducer housing 120 and the connecting plate 140, which not only improves the integration and structural strength of the integrated housing 100, but also makes full use of the space between the reducer housing 120 and the motor housing 110, so that the arrangement of the electric control groove 150 does not additionally occupy the axial space of the motor housing 110 and the radial space of the reducer housing 120, thereby reducing the volume of the dual motor powertrain 10. Each electric control slot 150 is used to accommodate a power module 1301, so the two electric control slots 150 can be made of the same size, making the overall housing 10a of the dual-motor powertrain 10 more regular and the layout of the dual-motor powertrain 10 more regular.

[0118] in, Figure 5 The gear shaft assembly 12 a of the reducer 12 shown in FIG. 1 is only a schematic position of the gear shaft assembly 12 a and does not represent a specific structure.

[0119] In one embodiment, if Figure 4 As shown, the orientation of the notch 153 of each electric control slot 150 is the same as the orientation of the notch 221 of the receiving slot 220 .

[0120] In the embodiment of the present application, the direction of the slot 153 of the electric control slot 150 is the same as the direction of the slot 221 of the receiving slot 220, which is conducive to installing the electrical component 1304 and the two power modules 1301 in the receiving slot 220 of the intermediate shell 200 and the electric control slot 150 of the integrated shell 100 from the same direction, simplifying the assembly process and facilitating the maintenance and replacement of components in the dual-motor controller 13.

[0121] In one embodiment, if Figure 3 and Figure 4As shown, the notch 153 of each electric control slot 150 is flush with the notch 221 of the receiving slot 220. In one embodiment, the overall housing 10a of the dual-motor powertrain 10 further includes two electric control covers 130a and an intermediate cover 130b, and the notch 153 of each electric control slot 150 is flush with the notch 221 of the receiving slot 220, so that the arrangement between the intermediate housing 200 and the two integrated housings 100 is more regular, and it is also convenient for the two electric control covers 130a and the intermediate cover 130b to cover the notches 153 of the two electric control slots 150 and the notch 221 of the receiving slot 220 respectively, and it is also beneficial to prevent the electric control slot 150 from occupying too much space in the height direction of the dual-motor powertrain 10, which is beneficial to reducing the volume of the overall housing 10a of the dual-motor powertrain 10 and optimizing the layout of the dual-motor powertrain 10 in the vehicle.

[0122] Figure 7 It is another schematic diagram of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0123] In one embodiment, if Figure 5 and Figure 6 As shown, the intermediate housing 200 includes two first power holes 230, and a portion of the outer wall 121 of each reducer housing 120 includes a second power hole 1211. The two first power holes 230 are connected to the receiving slot 220, and the second power hole 1211 of each reducer housing 120 is connected to an electric control slot 150. The first power hole 230 along the axial direction O of the dual-motor powertrain 10 is used to align the second power hole 1211, as shown in FIG. Figure 5 and Figure 7 As shown, the aligned first power hole 230 and the second power hole 1211 are used to pass through a power connector 101 , and the power connector 101 is used to electrically connect the electrical component 1304 and the power module 1301 .

[0124] In the embodiment of the present application, the inner wall of each reducer housing 120 refers to the inner wall of the accommodating cavity accommodating the reducer 12, and the outer wall of each reducer housing 120 is opposite to its inner wall. Part of the outer wall 121 of each reducer housing 120 includes a second power hole 1211, so that the power connector 101 can be arranged on the part of the outer wall 121 of the reducer housing 120. The two first power holes 230 are connected to the accommodating slot 220, and the second power hole 1211 of each reducer housing 120 is connected to an electric control slot 150, so that the electrical component 1304 in the accommodating slot 220 can be electrically connected to the power module 1301 in each electric control slot 150 through the power connector 101 arranged on the first power hole 230 and the second power hole 1211, and the DC power received by the electrical component 1304 from the power battery 30 is transmitted to the power module 1301 through the power connector 101.

[0125] like Figure 4 As shown, the two first power holes 230 are connected to the accommodating slot 220, and the second power hole 1211 of each reducer housing 120 is connected to an electric control slot 150. The cables connecting the power connector 101 to the electrical component 1304 and the power module 1301 can be arranged in the intermediate housing 200 and the integrated housing 100, without the need to arrange additional cables outside the overall housing 10a of the dual-motor powertrain 10, which is conducive to simplifying the cable arrangement of the dual-motor powertrain 10.

[0126] In the embodiment of the present application, the first power hole 230 is used to align the second power hole 1211 along the axial direction O of the dual-motor powertrain 10, so as to facilitate the power connector 101 to pass through the first power hole 230 and the second power hole 1211, and also to achieve electrical connection between the electrical component 1304 in the receiving slot 220 and the power module 1301 in the electric control slot 150 with the shortest cable. The alignment of the first power hole 230 and the second power hole 1211 along the axial direction O of the dual-motor powertrain also makes the openings on the overall housing 10a of the dual-motor powertrain 10 more regular.

[0127] In one embodiment, if Figure 4 As shown, the dual motor controller 13 also includes a control board 1303 and two circuit boards 1302. The receiving slot 220 is also used to receive the control board 1303, and each electric control slot 150 is also used to receive a circuit board 1302. Figure 6 As shown, the intermediate housing 200 includes two first communication holes 240. Figure 5 As shown, the outer wall 121 of each reducer housing 120 includes a second communication hole 1212, the two first communication holes 240 are connected to the receiving slot 220, and the second communication hole 1212 of each reducer housing 120 is connected to the electric control slot 150. The first communication hole 240 along the axial direction O of the dual-motor powertrain 10 is used to align the second communication hole 1212, as shown in FIG. Figure 7 As shown, the aligned first communication hole 240 and the second communication hole 1212 are used to pass through a communication connector 102 , and the communication connector 102 is used to electrically connect the control board 1303 and the circuit board 1302 .

[0128] In the embodiment of the present application, the intermediate housing 200 includes two first communication holes 240, so that the communication connector 102 can be installed in the intermediate housing 200, and the part of the outer wall 121 of each reducer housing 120 includes a second communication hole 1212, so that the communication connector 102 can be installed in the part of the outer wall 121 of the reducer housing 120. The two first communication holes 240 are connected to the receiving slot 220, and the second communication hole 1212 of each reducer housing 120 is connected to the electric control slot 150, so that the control single board 1303 in the receiving slot 220 can be electrically connected with the circuit board 1302 in each electric control slot 150 through the communication connector 102 installed in the first communication hole 240 and the second communication hole 1212, and the received signal from the whole vehicle is transmitted to the circuit board 1302 in each electric control slot 150 through the communication connector 102, and then the electric signal transmitted to the drive motor 11 is controlled, and the two drive motors 11 are coordinated and controlled to ensure the normal driving of the electric vehicle 1. It also allows the cables connecting the communication connector 102 to the control board 1303 and the circuit board 1302 to be arranged inside the intermediate shell 200 and the integrated shell 100, without the need to arrange additional cables outside the main shell 10a of the dual-motor powertrain 10, which is conducive to simplifying the cable arrangement of the dual-motor powertrain 10.

[0129] In the embodiment of the present application, the first communication hole 240 is used to align the second communication hole 1212 along the axial direction O of the dual-motor powertrain 10, so that the communication connector 102 can be easily passed through the first communication hole 240 and the second communication hole 1212, and the electrical connection between the control board 1303 in the accommodating slot 220 and the circuit board 1302 in the electric control slot 150 can be realized with the shortest cable. The alignment of the first communication hole 240 and the second communication hole 1212 along the axial direction O of the dual-motor powertrain also makes the openings on the overall housing 10a of the dual-motor powertrain 10 more regular.

[0130] like Figure 6 As shown, in one embodiment, each side surface 210 of the intermediate housing 200 further includes two first mounting surfaces 211, each first mounting surface 211 surrounds the opening periphery of a reducer housing 120, and along the axial direction O of the dual-motor powertrain 10, two first power holes 230 respectively penetrate the two first mounting surfaces 211, and along the axial direction O of the dual-motor powertrain 10, two first communication holes 240 respectively penetrate the two first mounting surfaces 211. Figure 5As shown, the outer wall of each reducer housing 120 also includes a second mounting surface 125, which surrounds the outer periphery of the reducer accommodating groove 250, and each second mounting surface 125 is used to fix a first mounting surface 211. The second power hole 1211 along the axial direction O of the dual-motor powertrain 10 penetrates the second mounting surface 125, and the second communication hole 1212 along the axial direction O of the dual-motor powertrain 10 penetrates the second mounting surface 125. By forming the first power hole 230 and the second power hole 1211 on the first mounting surface 211 and the second mounting surface 125 respectively, and forming the first communication hole 240 and the second communication hole 1212 on the first mounting surface 211 and the second mounting surface 125 respectively, the power connector 101 accommodated in the first power hole 230 and the second power hole 1211 and the communication connector 102 accommodated in the first communication hole 240 and the second communication hole 1212 can avoid the gear shaft assembly 12a of the reducer 12 in the reducer receiving groove 250 from rotating and being damaged, thereby improving the electrical safety of the dual-motor powertrain 10 and making the line layout more regular.

[0131] Figure 8 1 is a schematic diagram of a bus capacitor 1306, a power module 1301 and a circuit board 1302 provided in an embodiment of the present application. Fig. 9 is another schematic diagram of the integrated housing 100 provided in an embodiment of the present application. Fig.10 is another schematic diagram of the integrated housing 100 provided in an embodiment of the present application. Fig.11 It is a schematic diagram of the overall housing 10a of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0132] In one embodiment, see Figures 7 to 10 ,like Figure 8 As shown, the dual motor controller 13 also includes two groups of output copper bars 1305, each group of output copper bars 1305 includes three output copper bars 1305, and the three output copper bars 1305 are used to electrically connect a power module 1301 and a stator winding of a drive motor 11, such as Figures 9 to 11 As shown, a portion of the outer wall 121 of each reducer housing 120 includes a group of three-connected through holes 1213, each group of three-connected through holes 1213 includes at least one three-connected through hole 1213, and each group of three-connected through holes 1213 is used to pass a group of output copper bars 1305.

[0133] In an embodiment of the present application, each group of output copper bars 1305 includes three output copper bars 1305, and the three output copper bars 1305 are used to electrically connect a power module 1301 and a stator winding of a drive motor 11, so that the power module 1301 can convert the direct current received from the power connector 101 into alternating current and transmit it to the stator winding of the drive motor 11 through the three output copper bars 1305, thereby driving the drive motor 11 to operate.

[0134] In the implementation of the present application, the dual-motor controller 13 also includes two bus capacitors 1306, and each electric control slot 150 is also used to accommodate a bus capacitor 1306. In each electric control slot 150, the circuit board 1302, the power module 1301 and the bus capacitor 1306 are stacked in sequence, so that the space occupied by the circuit board 1302, the power module 1301 and the bus capacitor 1306 is smaller.

[0135] In the embodiment of the present application, a portion of the outer wall 121 of each reducer housing 120 includes a group of three connected through holes 1213, and each group of three connected through holes 1213 is used to pass a group of output copper bars 1305, such as Fig.11 As shown, the two power modules 1301 connected to a group of output copper bars 1305 in the two electric control slots 150 can be symmetrically arranged along the axial direction O of the dual-motor powertrain toward one side of the intermediate shell 200, so that the dual-motor controller 13 is arranged more regularly, which is conducive to reducing the volume of the dual-motor controller 13, and then reducing the volume of the dual-motor powertrain 10, and optimizing the layout of the dual-motor powertrain 10 in the whole vehicle.

[0136] In the embodiment of the present application, a portion of the outer wall 121 of each reducer housing 120 includes a group of three connected through holes 1213, and each group of three connected through holes 1213 is used to pass through a group of output copper bars 1305, so that the alternating current transmitted from the power module 1301 in each electric control slot 150 to a group of output copper bars 1305 can be directly transmitted to the stator winding of the drive motor 11 through the portion of the outer wall 121 of each reducer housing 120, without the need to additionally arrange a shell accommodating the three output copper bars 1305 outside the main housing 10a of the dual-motor powertrain 10, so that the arrangement of components in the dual-motor powertrain 10 is more compact and the space utilization rate is higher, which is conducive to reducing the overall volume of the main housing 10a of the dual-motor powertrain 10.

[0137] In the embodiment of the present application, a portion of the outer wall 121 of each reducer housing 120 includes a group of three connected through holes 1213, and each group of three connected through holes 1213 is used to pass a group of output copper bars 1305. It also makes the transmission path of the alternating current transmitted from the power module 1301 to the stator winding of the drive motor 11 through a group of output copper bars 1305 shorter, which is beneficial to reduce power loss and improve the efficiency of the dual-motor powertrain 10.

[0138] Fig.12 is another schematic diagram of the integrated housing 100 provided in an embodiment of the present application. Fig.13 It is another schematic diagram of the overall housing 10a of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0139] In one embodiment, if Figure 8 , Fig.12 and Fig.13 As shown, each connection plate 140 includes a group of three connected through holes 1411 , each group of three connected through holes 1411 includes at least one three connected through hole 1411 , and each group of three connected through holes 1411 is used to pass a group of output copper bars 1305 .

[0140] In the embodiment of the present application, each connecting plate 140 includes a group of three connected through holes 1411, and each group of three connected through holes 1411 is used to pass a group of output copper bars 1305, such as Fig.13 As shown, the connecting plates 140 constituting the electric control slots 150 are arranged on both sides of the two reducer housings 120, so that the power modules 1301 connected to a group of output copper bars 1305 in the two electric control slots 150 can be symmetrically arranged outwardly away from the middle housing 200 along the axial direction O of the dual-motor powertrain, making the dual-motor controller 13 more regularly arranged, which is conducive to reducing the volume of the dual-motor controller 13, and then reducing the volume of the dual-motor powertrain 10, and optimizing the layout of the dual-motor powertrain 10 in the whole vehicle.

[0141] In the embodiment of the present application, each connecting plate 140 includes a group of three connected through holes 1411, and each group of three connected through holes 1411 is used to pass a group of output copper bars 1305, so that the alternating current transmitted from the power module 1301 in each electric control slot 150 to a group of output copper bars 1305 can be directly transmitted to the stator winding of the drive motor 11 through each connecting plate 140, so that the arrangement of a group of output copper bars 1305 can make full use of the gap space between the motor housing 110 and the reducer housing 120 below the slot bottom 154 of each electric control slot 150, without excessively occupying the axial dimension of the motor housing 110 and the radial dimension of the reducer housing 120 in the overall housing 10a of the dual-motor powertrain 10, which is beneficial to reducing the volume of the dual-motor powertrain 10.

[0142] Fig.14 It is another schematic diagram of the overall housing 10a of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0143] In one embodiment, if Figure 8 and Fig.14 As shown, a partial outer wall 121 of the reducer housing 120 of an integrated housing 100a includes a group of three-connected through holes 1213, and a connecting plate 140 of another integrated housing 100b includes another group of three-connected through holes 1411, each group of three-connected through holes 1213 includes at least one three-connected through hole 1213, and each group of three-connected through holes 1213 is used to pass a group of output copper busbars 1305, and each group of three-connected through holes 1411 includes at least one three-connected through hole 1411, and each group of three-connected through holes 1411 is used to pass a group of output copper busbars 1305.

[0144] In an embodiment of the present application, a partial outer wall 121 of a reducer housing 120 of an integrated housing 100a includes a group of three-connected through holes 1213, and each group of three-connected through holes 1213 is used to pass through a group of output copper bars 1305 so that the alternating current transmitted from the power module 1301 in the electric control slot 150 of the integrated housing 100a to a group of output copper bars 1305 can be directly transmitted to the stator winding of the drive motor 11 through the partial outer wall 121 of the reducer housing 120, without the need to additionally arrange a shell accommodating a group of output copper bars 1305 outside the total housing 10a of the dual-motor powertrain 10, thereby making the arrangement of components in the dual-motor powertrain 10 more compact and the space utilization rate higher, which is conducive to reducing the overall volume of the total housing 10a of the dual-motor powertrain 10. The connecting plate 140 of the integrated housing 100b includes another group of three connected through holes 1411, and each group of three connected through holes 1411 is used to pass through a group of output copper bars 1305, so that the alternating current transmitted from the power module 1301 in the electric control slot 150 of another integrated housing 100b to the other group of output copper bars 1305 can be directly transmitted to the stator winding of the drive motor 11 through the connecting plate 140, so that the arrangement of the other group of output copper bars 1305 can make full use of the gap space between the motor housing 110 and the reducer housing 120 below the bottom of the electric control slot 150 without occupying too much of the axial and radial dimensions of the dual-motor powertrain 10, which is beneficial to reducing the volume of the dual-motor powertrain 10.

[0145] like Fig.14 As shown, in the embodiment of the present application, a portion of the outer wall 121 of the reducer housing 120 of the integrated housing 100a includes a group of three connected through holes 1213, and the connecting plate 140 of the integrated housing 100b includes another group of three connected through holes 1411, which can make the power module 1301 in the electric control slot 150 of the integrated housing 100a arranged along the axial direction O of the dual-motor powertrain toward the intermediate housing 200, and make the power module 1301 in the electric control slot 150 of the integrated housing 100b arranged away from the intermediate housing 200 along the axial direction O of the dual-motor powertrain, so that the two power modules 1301 of the dual-motor controller 13 are arranged in translation along the axial direction O of the dual-motor powertrain, so that the dual-motor controller 13 is arranged more regularly, which is conducive to reducing the volume of the dual-motor controller 13, and then reducing the volume of the dual-motor powertrain 10, and optimizing the layout of the dual-motor powertrain 10 in the whole vehicle.

[0146] Fig.15 It is another schematic diagram of the overall housing 10a of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0147] In one embodiment, if Figure 8 , Fig.14 and Fig.15As shown, each group of three-connected through holes 1501 includes three three-connected through holes 1501, and the three three-connected through holes 1501 are respectively used to pass through the three output copper bars 1305 of each group of output copper bars 1305, wherein, as shown in FIG. Fig.14 As shown, the arrangement direction of the three three-connected through holes 1501 intersects with the axial direction O of the dual-motor power assembly 10, as shown in FIG. Fig.15 As shown, three three-connected through holes 1501 are arranged at intervals along the axial direction O of the dual-motor powertrain 10.

[0148] In the embodiments of the present application, Fig.14 As shown, the three three-connected through holes 1501 are respectively used to pass through the three output copper bars 1305 of each group of output copper bars 1305, and the arrangement direction of the three three-connected through holes 1501 intersects with the axial direction O of the dual-motor powertrain 10, so that the width direction of the power module 1301 connected to the three output copper bars 1305 passing through the three three-connected through holes 1501 is arranged in the same direction as the axial direction O of the dual-motor powertrain, and the length direction of the power module 1301 can better utilize the space on the outer wall of the reducer housing 120 for arrangement, so that the axial dimension of the dual-motor controller 13 is smaller.

[0149] In one embodiment, in order to make the layout of the three three-connected through holes 1501 adapt to the arrangement of the components of the electric control slot 150, the arrangement direction of the three three-connected through holes 1501 can be the approximate arrangement direction of the three three-connected through holes 1501. In one embodiment, when one of the three three-connected through holes 1501 deviates from the arrangement direction of the other two three-connected through holes 1501, it should also be understood that the arrangement direction of the three three-connected through holes 1501 is the arrangement direction of the other two three-connected through holes 1501, such as Fig.14 As shown, Fig.14 Among the three three-connected through holes 1501 of the middle right electric control slot 150, the top three-connected through hole 1501 deviates to the right from the arrangement direction of the other two three-connected through holes 1501 below. It should be understood that the arrangement direction of the other two three-connected through holes 1501 is the arrangement direction of the three three-connected through holes 1501.

[0150] In one embodiment, the arrangement direction of the three three-connected through holes 1501 is the same as the arrangement direction of the connecting plate 140 and the motor housing 110 .

[0151] In the embodiments of the present application, Fig.15As shown, the three three-connected through holes 1501 are arranged at intervals along the axial direction O of the dual-motor powertrain 10, so that the length direction of the power module 1301 connected to the three output copper bars 1305 passing through the three three-connected through holes 1501 can be arranged in the same direction as the axial direction O of the dual-motor powertrain, and the space along the axial direction O of the dual-motor powertrain can be fully utilized, so that the space occupied by the dual-motor controller 13 perpendicular to the axial direction O of the dual-motor powertrain is smaller.

[0152] In one embodiment, different arrangements of the three three-way connecting holes 1501 can be selected according to different spaces in the vehicle, and thus different arrangements of the two power modules 1301 can be selected.

[0153] Fig.16 It is another schematic diagram of the overall housing 10a of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0154] In some embodiments, a group of output copper bars 1305 of the power module 1301 does not correspond to a group of three-way through holes 1501, and a group of output copper bars 1305 can be electrically connected to the stator winding of the drive motor 11 by using a transfer copper bar 1307. Fig.16 As shown, the width direction of the power module 1301 is parallel to the axial direction O of the dual-motor power assembly 10, and the three output copper bars 1305 of the power module 1301 in the two electric control slots 150 extend toward the same side of the axial direction O of the dual-motor power assembly 10, as shown in FIG. Fig.16 As shown, the axial direction O of the dual-motor power assembly 10 of the three output copper bars 1305 of the power module 1301 in the two electric control slots 150 faces to the left, and the three output copper bars 1305 of the power module 1301 in the left electric control slot 150 are connected to the stator winding through a transfer copper bar 1307.

[0155] Fig.17 yes Figure 7 A partial enlarged view of the M1 portion of the dual-motor powertrain 10.

[0156] See also Figure 4 , Figure 7 and Fig.17In one embodiment, the first power hole 230 and the second power hole 1211 are also used to accommodate a communication cable 103. The communication cable 103 is used to pass through the two first power holes 230 of the intermediate housing 200 and the second power holes 1211 of the two integrated housings 100. The communication cable 103 is used to connect the two circuit boards 1302 of the dual-motor controller 13. The communication cable 103 is used to achieve communication between the two circuit boards 1302. The electric control slot 150 is also used to accommodate a shielding cover 104. The shielding cover 104 is used to cover part of the power connector 101 between the first power hole 230, the second power hole 1211 and the power module 1301. Since the power connector 101 is used to transmit high-voltage direct current, and the communication cable 103 accommodated by the first power hole 230 and the second power hole 1211 has the same arrangement path as part of the power connector 101, a shielding cover 104 is provided on part of the power connector 101 between the first power hole 230 and the second power hole 1211 and the power module 1301 to isolate the power connector 101 from the communication cable 103.

[0157] Fig.18 is a schematic diagram of the shielding cover 104 provided in an embodiment of the present application, Fig.19 It is a partial cross-sectional view of the shielding cover 104 and the power connector 101 provided in the embodiment of the present application.

[0158] In one embodiment, if Fig.18 and Fig.19 As shown, the two sides of the shielding cover 104 include buckles 1041 and spring sheets 1042, and the top of the shielding cover 104 includes a fixing hole 1043. The shielding cover 104 is directly fixed in the electric control slot 150 through the buckles 1041 and the spring sheets 1042, without the need for screws, and has a reliable structure and convenient installation. The wire buckle passes through the fixing hole 1043 to fix the wire harness in the electric control slot 150. In one embodiment, the material of the shielding cover 104 is stainless steel.

[0159] In one embodiment, if Figure 7 , Fig.17 , Fig.18 and Fig.19As shown, both sides of the shielding cover 104 further include windows 1044, and the power connector 101 includes a plastic part 101a and a copper busbar 101b fixed in the plastic part 101a, and the copper busbar 101b is used to electrically connect the electrical component 1304 and the power module 1301. Among them, the plastic part 101a includes an undercut structure 101c corresponding to the window 1044, and the shielding cover 104 forms a window 1044 at a position corresponding to the undercut structure 101c. When the shielding cover 104 is downwardly loaded into the electric control slot 150, the positions of both sides of the shielding cover 104 are limited under the elastic force of the spring sheets 1042 on both sides of the shielding cover 104, and the undercut structure 101c on the plastic part 101a prevents the shielding cover 104 from falling out, thereby stably fixing the shielding cover 104 in the electric control slot 150.

[0160] Fig. 20 It is another schematic diagram of the dual-motor powertrain 10 provided in an embodiment of the present application.

[0161] In one embodiment, if Figure 7 , Fig.17 and Fig. 20 As shown, the dual-motor controller 13 also includes two bus capacitors 1306 , each electric control slot 150 is used to accommodate a bus capacitor 1306 , and each power connector 101 is used to electrically connect the electrical component 1304 and the input end of a bus capacitor 1306 . When the functional components of the dual-motor controller 13 in the two electric control slots 150 are arranged in a translational manner, that is, when the three-phase input copper bus 1308 of the power module 1301 of the electric control slot 150 faces the same side along the axial direction O of the dual-motor powertrain 10, the input ends of the two bus capacitors 1306 also face the same side along the axial direction O of the dual-motor powertrain 10, so that the input end of one of the bus capacitors 1306 is at a different distance from the first power hole 230, and the length of the power connector 101 between the input end of the bus capacitor 1306 that is farther from the first power hole 230 and the electrical component 1304 is longer. The shielding cover 104 is provided on the power connector 101 with a longer length, which helps to reduce the interference of the power connector 101 with the communication cable 103.

[0162] Fig.21 It is another schematic diagram of the integrated housing 100 provided in an embodiment of the present application.

[0163] In one embodiment, if Figure 5 and Fig.21As shown, a portion of the outer wall 111 of the motor housing 110 and a portion of the outer wall 122 of the reducer housing 120 respectively constitute two slot walls 151 of the electric control slot 150, the connecting plate 140 includes a bottom plate 141 and two side plates 142, 143, the two side plates 142, 143 are respectively the other two slot walls 152 of the electric control slot 150, and the bottom plate 141 and another portion of the outer wall 123 of the reducer housing 120 constitute the slot bottom 154 of the electric control slot 150. One side plate 142 is arranged opposite to a portion of the outer wall 122 of the reducer housing 120 along the axial direction O of the dual-motor powertrain, and the other side plate 143 is opposite to a portion of the outer wall 111 of the motor housing 110.

[0164] In the embodiment of the present application, part of the outer wall 111 of the motor housing 110 and part of the outer wall 122 of the reducer housing 120 respectively constitute two groove walls 151 of the electric control groove 150, and the two groove walls 151 of the electric control groove 150 reuse part of the outer wall 111 of the motor housing 110 and part of the outer wall 122 of the reducer housing 120, so that the integration degree between the electric control groove 150, the motor housing 110, and the reducer housing 120 of the integrated housing 100 is higher, so that the integration degree of the integrated housing 100 is higher and the strength is stronger, which is conducive to improving the overall structural strength of the total housing 10a of the dual-motor powertrain 10. The bottom plate 141 and another part of the outer wall 123 of the reducer housing 120 constitute the groove bottom 154 of the electric control groove 150, so that the formation of the groove bottom 154 of the electric control groove 150 reuses another part of the outer wall 123 of the reducer housing 120, so that the integration degree of the integrated housing 100 is further improved and the structural strength is also stronger.

[0165] In the embodiment of the present application, one side plate 142 is arranged opposite to a portion of the outer wall 122 of the reducer housing 120 along the axial direction O of the dual-motor powertrain, and the other side plate 143 is arranged opposite to a portion of the outer peripheral wall 111 of the motor housing 110, so that the groove bottom 154 of the electric control groove 150 and the other two groove walls 152 fully utilize the gap space between the motor housing 110 and the reducer housing 120, which is conducive to a more compact layout and smaller volume of the dual-motor powertrain 10. In addition, the arrangement of the side plate 142 does not occupy additional space of the reducer housing 120 along the direction perpendicular to the axial direction O of the dual-motor powertrain, and the arrangement of the side plate 143 does not occupy additional space of the motor housing 110 along the axial direction O of the dual-motor powertrain, so that the arrangement of the electric control groove 150 does not occupy too much of the axial and radial dimensions of the dual-motor powertrain 10, which is conducive to reducing the volume of the dual-motor powertrain 10 and facilitating the layout of the dual-motor powertrain 10 in the vehicle.

[0166] like Figure 3 and Figure 5As shown, in one embodiment, a portion of the outer wall 111 of the motor housing 110 includes a fixing protrusion 111a, and a portion of the outer wall 122 of the reducer housing 120 includes another fixing protrusion 122a. The fixing protrusion 111a and the fixing protrusion 122a are used to form a notch 153 of the electric control slot 150 with the two side plates 142 and 143 of the connecting plate 140, wherein the fixing protrusion 111a and the fixing protrusion 122a are flush with the end surfaces of the two side plates 142 and 143 facing away from the bottom plate 141, so that the notch 153 of the electric control slot 150 is flush, which is conducive to the notch 153 of the electric control slot 150 covering with the electric control cover plate 130a.

[0167] In one embodiment, if Figure 5 As shown, the length of the side plate 143 along the axial direction O of the dual-motor powertrain is less than or equal to the sum of the lengths of the motor housing 110 and the reducer housing 120 connected thereto. The length of the side plate 142 along the arrangement direction X of the side plate 143 and the partial peripheral wall 111 of the motor housing 110 is less than the length of the reducer housing 120.

[0168] In the embodiment of the present application, along the axial direction O of the dual-motor powertrain, the length of the side plate 143 is denoted as L1, and the sum of the lengths of the motor housing 110 and the reducer housing 120 connected thereto is denoted as L2, L1≤L2, so that the arrangement of the side plate 143 will not occupy additional space outside the axial direction O of the motor housing 110 and the reducer housing 120 of the dual-motor powertrain, thereby making it possible for the arrangement of the electric control slot 150 to not occupy additional axial space outside the axial direction O of the motor housing 110 and the reducer housing 120 of the dual-motor powertrain, which is beneficial to reducing the volume of the integrated housing 100 and the overall housing 10a of the dual-motor powertrain 10.

[0169] In the embodiment of the present application, the length of the side plate 142 along the arrangement direction X of the side plate 143 and the partial outer peripheral wall 111 of the motor housing 110 is recorded as L3, and the length of the reducer housing 120 is recorded as L4, L3<L4, so that the arrangement of the side plate 142 will not occupy additional space of the reducer housing 120 along the arrangement direction X of the side plate 143 and the partial outer peripheral wall 111 of the motor housing 110, which is beneficial to reducing the volume of the integrated housing 100 and the overall housing 10a of the dual-motor powertrain 10.

[0170] In one embodiment, if Fig.15 As shown, the length of the side plate 142 is shorter than the length of the side plate 143 .

[0171] In the embodiments of the present application, Figure 8 and Fig.15As shown, the length of the side plate 142 is less than that of the side plate 143, so that the length direction of the electric control slot 150 is the same as the axial direction O of the dual-motor powertrain 10, which is conducive to arranging the three three-connected through holes 1501 in the electric control slot 150 along the axial direction O of the dual-motor powertrain 10 at intervals. The three three-connected through holes 1501 are used to pass through the three output copper bars 1305, so that the three output copper bars 1305 are arranged along the axial direction O of the dual-motor powertrain 10 at intervals. The three output copper bars 1305 are electrically connected to the power module 1301, so that the length direction of the power module 1301 in the electric control slot 150 can be arranged along the axial direction O of the dual-motor powertrain, so that the power module 1301 makes full use of the space in the electric control slot 150, so that the electric control slot 150 has a smaller volume along the arrangement direction X of the side plate 143 and the partial outer peripheral wall 111 of the motor housing 110, thereby reducing the volume of the dual-motor powertrain 10. In the embodiment of the present application, the length of the side panel 142 is smaller than the length of the side panel 143, so that the length direction of the electric control slot 150 is the same as the axial direction O of the dual-motor powertrain 10, and the dual-motor powertrain 10 with a variety of electric control slot 150 layouts is provided, which is also beneficial to increase the installation compatibility of the dual-motor powertrain 10 with the electric vehicle.

[0172] In one embodiment, if Fig.14 As shown, the length of the side plate 142 is greater than the length of the side plate 143 .

[0173] In the embodiments of the present application, Figure 8 and Fig.14 As shown in the figure, the length of the side plate 142 is greater than the length of the side plate 143, so that the length direction of the electric control slot 150 is the same as the arrangement direction X of the side plate 143 and the partial outer peripheral wall 111 of the motor housing 110, which is conducive to arranging the three three-connected through holes 1501 in the electric control slot 150 at intervals along the arrangement direction X of the side plate 143 and the partial outer peripheral wall 111 of the motor housing 110. The three three-connected through holes 1501 are used to pass through the three output copper bars 1305, so that the three output copper bars 1305 are arranged along the side plate 143 and the motor housing 110. 0, the three output copper bars 1305 are electrically connected to the power module 1301, so that the length direction of the power module 1301 in the electric control slot 150 can be arranged along the arrangement direction X of the side plate 143 and the part of the outer peripheral wall 111 of the motor housing 110, so that the power module 1301 makes full use of the space in the electric control slot 150, so that the electric control slot 150 has a smaller volume along the axial direction O of the dual-motor powertrain 10, thereby reducing the volume of the dual-motor powertrain 10. In the embodiment of the present application, the length of the side plate 142 is less than the length of the side plate 143, so that the width direction of the electric control slot 150 is the same as the axial direction O of the dual-motor powertrain 10, and a dual-motor powertrain 10 with a variety of electric control slot 150 layouts is provided, which is also conducive to increasing the installation compatibility of the dual-motor powertrain 10 and the electric vehicle 1.

[0174] Fig. 22 1 is a schematic diagram of the intermediate housing 200 and the gear shaft assembly 12a of the reducer 12 provided in an embodiment of the present application. Fig.23 It is a cross-sectional view of the intermediate housing 200 and the gear shaft assembly 12a of the reducer 12 provided in an embodiment of the present application.

[0175] In one embodiment, if Fig. 22 As shown, the two side surfaces 210 of the intermediate housing 200 respectively include two reducer receiving grooves 250, and the notches 251 of the two reducer receiving grooves 250 are opposite to each other along the axial direction O of the dual-motor power assembly 10, as shown in FIG. Fig.21 and Fig. 22 As shown, each reducer receiving groove 250 is used to enclose a reducer cavity 124 with the reducer housing 120 of the integrated housing 100, and each reducer cavity 124 is used to accommodate the gear shaft assembly 12a of the reducer 12. Each reducer 12 includes an output wheel 1201, and 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 for transmission connection with the wheel 40, as shown in FIG. Fig. 22 and Fig.23 As shown, each reducer receiving groove 250 is used to receive at least a portion of the output wheel 1201 , and a portion 220 a of the receiving groove 220 is recessed toward the gap between the output wheels 1201 of the two reducers 12 .

[0176] In the embodiment of the present application, the notches 251 of the two reducer accommodating grooves 250 are opposite to each other along the axial direction O of the dual-motor powertrain 10, and each reducer accommodating groove 250 is used to enclose a reducer cavity 124 with the reducer housing 120 of the integrated housing 100, and each reducer cavity 124 is used to accommodate the gear shaft assembly 12a of the reducer 12, so that the gear shaft assemblies 12a of the two reducers 12 of the dual-motor powertrain 10 can work independently without interfering with each other, which is conducive to the normal operation of the dual-motor powertrain 10.

[0177] In the embodiment of the present application, each reducer 12 includes an output wheel 1201, the radius of the output wheel 1201 of each reducer 12 is greater than the radius of any other gear of each reducer 12, and a portion 220a of the receiving groove 220 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 receiving groove 220, so that the arrangement of the components of the dual-motor powertrain 10 is more compact, and the integration of the dual-motor powertrain 10 is improved. It is also beneficial to make the receiving groove 220 have a larger space to accommodate electrical components, so that the electrical components 1304 and the control board 1303 in the dual-motor controller 13 can be placed in the receiving groove 220, which is beneficial to reducing the volume of the two electric control grooves 150 of the dual-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.

[0178] Fig.24 It is another cross-sectional view of the intermediate housing 200 and the gear shaft assembly 12a of the reducer 12 provided in an embodiment of the present application.

[0179] In one embodiment, if Fig. 22 and Fig.24 As shown, each reducer 12 further includes an input wheel 1202 and an intermediate wheel 1203, wherein the input wheel 1202 is used for transmission connection with the motor shaft of the drive motor 11, and the intermediate wheel 1203 is used for transmission connection with the input wheel 1202 and the output wheel 1201. The other part 220b of the accommodating groove 220 is recessed toward the input wheels 1202 and the intermediate wheels 1203 of the two reducers 12 along the radial direction R of the dual-motor powertrain.

[0180] 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 220b of the accommodating groove 220 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 220, so that the accommodating groove 220 has a larger space for accommodating the electrical components 1304 and the control board 1303, which is more conducive to reducing the volume of the two electric control slots 150 of the dual-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.

[0181] In one embodiment, the intermediate housing 200 further includes two circumferential plates 222, such as Fig. 22As shown, two circumferential plates 222 are spaced apart along the circumference C of the dual-motor powertrain 10, and each circumferential plate 222 is fixedly connected to the outer side of the groove wall of the two reducer receiving grooves 250, and the two circumferential plates 222 are used to enclose the outer side of the groove wall of the two reducer receiving grooves 250 to form the receiving groove 220.

[0182] In the embodiments of the present application, Figure 7 and Fig. 22 As shown, two circumferential plates 222 are spaced apart along the circumferential direction C of the dual-motor powertrain 10, and each circumferential plate 222 is fixedly connected to the outer side of the groove wall of the two reducer accommodating grooves 250, so that the groove walls of the two reducer accommodating grooves 250 can be reused to form the accommodating groove 220, and the space of the two reducer accommodating grooves 250 along the radial direction R of the dual-motor powertrain is fully utilized, so that the formation of the accommodating groove 220 will not increase the space of the dual-motor powertrain 10 along the radial direction R of the dual-motor powertrain, and the accommodating groove 220 can accommodate the electrical component 1304 and the control board 1303, thereby saving the space of the two electric control grooves 150 of the dual-motor controller 13 originally occupied by the electrical component 1304 and the control board 1303 in the accommodating groove 220, making the volume of the two electric control grooves 150 smaller, thereby reducing the overall volume of the dual-motor powertrain 10 and optimizing the layout of the entire vehicle.

[0183] In one embodiment, if Figure 6 As shown, the bottom of each reducer receiving groove 250 includes a plurality of bearing grooves 252, and each bearing groove 252 is used to fix a bearing. The groove depth of each reducer receiving groove 250 along the axial direction O of the dual-motor powertrain is greater than the groove depth of each bearing groove 252 of each reducer receiving groove 250.

[0184] In the embodiment of the present application, the groove depth of each reducer accommodating groove 250 along the axial direction O of the dual-motor powertrain is greater than the groove depth of each bearing groove 252 of each reducer accommodating groove 250, so that each reducer accommodating groove 250 has a larger axial space in addition to accommodating the bearings, so that the accommodating groove 220 formed on the outer side of the groove wall of two reducer accommodating grooves 250 can be reused to have a larger axial space, which is beneficial for making the space of the accommodating groove 220 larger, and is beneficial for placing more electrical components in the accommodating groove 220, reducing the volume of the electronic control groove 150 of the dual-motor controller 13, and then reducing the overall volume of the dual-motor powertrain 10.

[0185] In one embodiment, if Figure 3 and Fig. 22 As shown, a circumferential plate 222 a includes two DC mounting holes 2221 , and the two DC mounting holes 2221 are used to fix a DC connector 105 , and the DC connector 105 is used to electrically connect the electrical component 1304 and the positive and negative electrodes of the power battery 30 .

[0186] In the embodiment of the present application, the circumferential plate 222a includes two DC mounting holes 2221, and the two DC mounting holes 2221 are used to fix the DC connector 105, and the DC connector 105 is used to electrically connect the electrical component 1304 and the positive and negative electrodes of the power battery 30. The two DC mounting holes 2221 are opened on the circumferential plate 222a close to the power battery 30, and the space of the circumferential plate 222a is fully utilized. In the embodiment of the present application, the high-voltage DC power output by the power battery 30 is transmitted to the electrical component 1304 through the DC connector 105, and the electrical component 1304 outputs the DC power to the dual-motor controller 13 of the two drive motors 11.

[0187] In one embodiment, the DC installation holes 2221 penetrate the circumferential plate 222 a, so that the DC connector 105 can pass through the two DC installation holes 2221 to electrically connect the positive and negative electrodes of the power battery 30 with the electrical components 1304 in the receiving slot 220 .

[0188] In one embodiment, if Figure 7 and Fig. 22 As shown, another circumferential plate 222 b includes a communication mounting hole 2222 , and the communication mounting hole 2222 is used to fix a communication connector 106 , and the communication connector 106 is used to transmit control signals to the control board 1303 .

[0189] In the embodiment of the present application, the receiving slot 220 is also used to receive the control board 1303. The control board 1303 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, making driving control more flexible. The communication connector 106 is used to transmit signals from the vehicle to the control board 1303, so that the control board 1303 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 1303 can be a board of the vehicle controller.

[0190] In the embodiment of the present application, the circumferential plate 222b includes a communication mounting hole 2222, which is used to fix the communication connector 106, and the communication connector 106 is used to transmit control signals to the control board 1303, thereby making full use of the space of the circumferential plate 222b.

[0191] In one embodiment, two DC mounting holes 2221 are formed in the circumferential plate 222a, and the communication mounting holes 2222 are formed in the circumferential plate 222b, so that the communication mounting holes 2222 and the two DC mounting holes 2221 are spaced apart along the circumferential direction C of the dual-motor powertrain, so that the communication connector 106 and the DC connector 105 are far apart, which is conducive to reducing the telecommunication interference of the high-voltage DC input from the power battery 30 to the communication connector 106 and the control board 1303. The DC mounting holes 2221 and the communication mounting holes 2222 are also arranged neatly in the intermediate housing 200.

[0192] In one embodiment, if Figure 7 and Fig. 22 As shown, the communication installation hole 2222 passes through the circumferential plate 222 b, so that the communication connector 106 can transmit the control signal to the control board 1303 through the communication installation hole 2222 .

[0193] In one embodiment, if Figure 6 and Figure 7 As shown, the intermediate housing 200 further includes a partition plate 223, which is used to separate the receiving slot 220 to form two sub-slots 224 and 225, one sub-slot 224 is used to receive the electrical component 1304, and the other sub-slot 225 is used to receive the control board 1303. The first power hole 230 and the first communication hole 240 in the slot wall of each reducer receiving slot 250 are arranged on both sides of the partition plate 223, respectively.

[0194] In an embodiment of the present application, the partition plate 223 is used to separate the accommodating slot 220 to form two sub-slots 224 and 225. The sub-slot 224 is used to accommodate the electrical component 1304, and the sub-slot 225 is used to accommodate the control board 1303. The partition plate 223 can shield the electrical signal between the electrical component 1304 and the control board 1303, so that the electrical component 1304 in the sub-slot 224 will not affect the signal transmission quality of the control board 1303 in the sub-slot 225.

[0195] In an embodiment of the present application, the first power hole 230 is used to pass through the power connector 101, and the power connector 101 is used to electrically connect the electrical component 1304 and the power module 1301. The first communication hole 240 is used to pass through the communication connector 102, and the communication connector 102 is used to transmit the control signal between the control board 1303 and the circuit board 1302. The second power hole 1211 and the second communication hole 1212 in the groove wall of each reducer accommodating groove 250 are respectively arranged on both sides of the partition plate 223, that is, the power connector 101 and the communication connector 102 are respectively arranged on both sides of the partition plate 223, so that the electrical signals between the power connector 101 and the communication connector 102 will not interfere with each other, which is conducive to the normal operation of the dual-motor powertrain 10.

[0196] Fig.25 is another schematic diagram of the integrated housing 100 provided in an embodiment of the present application. Fig.26 It is a cross-sectional view of the integrated housing 100 provided in an embodiment of the present application.

[0197] In one embodiment, each integrated housing 100 further includes an isolation cavity 260, which is formed in a portion of the motor housing 110 that constitutes a slot wall of the electric control slot 150, and the opening of the isolation cavity 260 is away from the bottom plate 141 of the connecting plate 140. Fig.25 and Fig.26 As shown, the isolation cavity 260 is formed by die draft, which reduces the accumulation of materials between the electric control slot 150 and the motor housing 110, avoids the interpenetration of coolant between the electric control slot 150 and the motor housing 110, and can also prevent the heat in the motor housing 110 from being transferred to the electric control slot 150 through the side wall of the integrated housing 100, affecting the heat dissipation of the dual motor controller 13. Die draft to form the isolation cavity 260 can also reduce the weight of the integrated housing 100 and save the die-casting material of the integrated housing 100. The isolation cavity 260 is formed by die draft, has a rougher side wall, and is easy to form a denser surface, so that the motor housing 110 and the electric control slot 150 of the integrated housing 100 maintain structural strength and density.

[0198] In one embodiment, if Fig.25 As shown, each integrated housing 100 further includes a plurality of openings 261 and an axial cavity 270, the axial cavity 270 extending along the axial direction O of the dual-motor powertrain 10, each opening 261 is used to connect the isolation cavity 260 and the axial cavity 270, and the plurality of openings 261 are used to prevent water from being deposited in the isolation cavity 260, and the plurality of openings 261 are obtained by tool processing. The axial cavity 270 can reduce the wall thickness between the motor housing 110 and the electric control slot 150 to achieve weight reduction, and can also achieve isolation of the coolant in the motor housing 110 from the coolant in the electric control slot 150.

[0199] Fig. 27 yes Fig.26 A partially enlarged view of the M2 portion of the integrated shell 100.

[0200] In one embodiment, if Fig.26 and Fig. 27As shown, the bottom 154 of the electric control tank 150 includes an internal channel 154a, and the internal channel 154a of the bottom 154 is used to transport coolant, and the coolant is used to cool the power module 1301 and the bus capacitor 1306 of the dual motor controller 13. The isolation cavity 260 is formed between the internal channel 154a of the bottom 154 and the inner wall of the motor housing 110, so that the isolation cavity 260 isolates the coolant in the internal channel 154a of the bottom 154 from the coolant in the motor housing 110. The coolant in the motor housing 110 is oil, and the coolant in the internal channel 154a of the bottom 154 is cooling water. The isolation cavity 260 is used to prevent the oil and water from interpenetrating between the electric control tank 150 and the motor housing 110.

[0201] 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, two reducers and a dual-motor controller. 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 two integrated housings and an intermediate housing. Each of the integrated housings includes a motor housing, a reducer housing and a connecting plate. Each of the motor housings is used to fix a stator of the drive motor and accommodate a rotor of the drive motor. Each of the reducer housings is used to accommodate a gear shaft assembly of the reducer. The reducer housings of the two integrated housings are respectively fixed to the two side surfaces of the intermediate housing, wherein: The dual-motor controller includes an electrical component and two power modules, wherein the electrical component is used to receive direct current output by the power battery and to deliver direct current to the two power modules respectively, and each power module is used to deliver alternating current to one of the drive motors; The intermediate housing comprises a receiving groove, the receiving groove is recessed toward the gap between the two reducers, and the receiving groove is used to receive the electrical component; Each of the connecting plates is used to enclose a portion of the outer peripheral wall of a motor housing and a portion of the outer wall of a reducer housing of the integrated housing to form an electric control slot, and each of the electric control slots is used to accommodate one of the power modules.

2. The dual-motor powertrain according to claim 1, characterized in that: The orientation of the slot opening of each of the electric control slots is the same as the orientation of the slot opening of the one containing slot.

3. The dual-motor powertrain according to claim 1, characterized in that: The one intermediate housing includes two first power holes, the part of the outer wall of each reducer housing includes a second power hole, the two first power holes are connected to the one accommodating groove, and the one second power hole of each reducer housing is connected to one electric control groove, wherein: Along the axial direction of the dual-motor powertrain, one of the first power holes is used to align with one of the second power holes, and the aligned first power holes and one of the second power holes are used to pass through a power connector, and the power connector is used to electrically connect one of the electrical components and one of the power modules.

4. The dual-motor powertrain according to claim 1, characterized in that: The dual-motor controller further comprises a control single board and two circuit boards, the accommodating slot is further used to accommodate the control single board, each of the electric control slots is further used to accommodate one of the circuit boards, the intermediate housing comprises two first communication holes, the partial outer wall of each of the reducer housings comprises a second communication hole, the two first communication holes are connected to the accommodating slot, and the second communication hole of each of the reducer housings is connected to one of the electric control slots, wherein: Along the axial direction of the dual-motor powertrain, one of the first communication holes is used to align with one of the second communication holes, and the aligned first communication holes and one of the second communication holes are used to pass through a communication connector, and the communication connector is used to electrically connect one of the control boards and one of the circuit boards.

5. The dual-motor powertrain according to any one of claims 1 to 4, characterized in that: The dual-motor controller also includes two groups of output copper bars, each group of the output copper bars includes three output copper bars, and the three output copper bars are used to electrically connect a power module and a stator winding of a drive motor. The partial outer wall of each reducer housing includes a group of three-connected through holes, and each group of the three-connected through holes includes at least one three-connected through hole, and each group of the three-connected through holes is used to pass through a group of the output copper bars.

6. The dual-motor powertrain according to any one of claims 1 to 4, characterized in that: The dual-motor controller also includes two groups of output copper bars, each group of the output copper bars includes three output copper bars, and the three output copper bars are used to electrically connect a power module and a stator winding of a drive motor. Each of the connecting plates includes a group of three-connected through holes, and each group of the three-connected through holes includes at least one three-connected through hole, and each group of the three-connected through holes is used to pass through a group of the output copper bars.

7. The dual-motor powertrain according to any one of claims 1 to 4, characterized in that: The dual-motor controller also includes two groups of output copper bars, each group of the output copper bars includes three output copper bars, and the three output copper bars are used to electrically connect a power module and a stator winding of a drive motor. The partial outer wall of a reducer housing of one of the integrated housings includes a group of three-connected through holes, and the connecting plate of another integrated housing includes another group of three-connected through holes, each group of the three-connected through holes includes at least one three-connected through hole, and each group of the three-connected through holes is used to pass through a group of the output copper bars.

8. The dual-motor powertrain according to any one of claims 5 to 7, characterized in that: Each group of the three-connected through holes includes three three-connected through holes, and the three three-connected through holes are respectively used to pass through the three output copper bars of each group of the output copper bars, wherein the arrangement direction of the three three-connected through holes intersects with the axial direction of the dual-motor powertrain, or the three three-connected through holes are arranged at intervals along the axial direction of the dual-motor powertrain.

9. The dual-motor powertrain according to any one of claims 1 to 8, characterized in that: The part of the outer peripheral wall of the motor housing and the part of the outer wall of the reducer housing respectively constitute two slot walls of the electric control slot, the connecting plate includes a bottom plate and two side plates, the two side plates are respectively the other two slot walls of the electric control slot, and the bottom plate and the other part of the outer wall of the reducer housing constitute the slot bottom of the electric control slot; One of the side plates is arranged opposite to the portion of the outer wall of the 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 motor housing.

10. The dual-motor powertrain according to claim 9, characterized in that: The length of the other side plate along the axis of the dual-motor powertrain is less than or equal to the sum of the lengths of the motor housing and the reducer housing connected thereto; 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.

11. The dual-motor powertrain according to claim 9, characterized in that: The length of the one side plate is smaller than the length of the other side plate, or the length of the one side plate is larger than the length of the other side plate.

12. The dual-motor powertrain according to any one of claims 1 to 11, characterized in that: The two side surfaces of the one intermediate housing respectively include two reducer accommodating grooves, the notches of the two reducer accommodating grooves are opposite to each other along the axial direction of the dual-motor powertrain, each reducer accommodating groove is used to enclose a reducer housing of one of the integrated housings to form a reducer cavity, and each reducer cavity is used to accommodate a gear shaft assembly of the reducer, wherein: 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 each of the reducer receiving grooves is used to accommodate at least a portion of the output wheel, and a portion of the receiving groove is recessed toward the gap between the output wheels of the two reducers.

13. The dual-motor powertrain according to claim 12, 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.

14. The dual-motor powertrain according to any one of claims 1 to 13, characterized in that: The intermediate housing also includes two circumferential plates, which are distributed at intervals along the circumference of the dual-motor powertrain, and 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.

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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