Powertrain and electric vehicle

Abstract

This application provides a powertrain and an electric vehicle, relating to the field of electric vehicle technology. This application integrates the power supply unit and motor controller of the powertrain into the first receiving slot by increasing the receiving space of the first receiving slot. The bottom of the first receiving slot overlaps the peripheral wall of a second receiving slot, which is used to accommodate at least one of a drive motor or a planetary reducer. The bottom of the first receiving slot protrudes from both sides of the peripheral wall of the second receiving slot along a first direction, forming a first section and a second section respectively. This disperses the increased receiving space required by the first receiving slot to the inner sides of the first and second sections, which is beneficial for adapting to the coaxial arrangement of the input and output ends of the planetary reducer. Based on the positional relationship between the first section and the second receiving slot, this application arranges a third receiving slot outside the first section and outside the peripheral wall of the second receiving slot. This allows the space outside the first section to accommodate an oil pump or a fine filter, reducing the outer envelope size of the powertrain.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, and in particular to a powertrain and an electric vehicle. Background Technology

[0002] In electric vehicles, the integrated design of the powertrain is one of the important directions of current technological development. Integrating multiple modules of the powertrain usually involves modifying the powertrain's housing structure. How to coordinate the arrangement of other components based on these modifications to the housing structure while improving the powertrain's integration level is a problem that needs to be solved. Summary of the Invention

[0003] This application provides a powertrain and electric vehicle that can optimize component layout and reduce the outer envelope size of the powertrain while improving integration.

[0004] In a first aspect, embodiments of this application provide a powertrain, which includes a power supply unit, a motor controller, a drive motor, and a planetary reducer. The power supply unit outputs direct current to power the electric vehicle's battery or load. The motor controller outputs alternating current to control the drive motor. The drive motor is used to drive the input end of the planetary reducer, and the output end of the planetary reducer is used to drive the wheels of the electric vehicle. The input and output ends of the planetary reducer are arranged along the axial direction of the drive motor.

[0005] The powertrain housing includes a first receiving compartment, a second receiving compartment, and a third receiving compartment. The first receiving compartment is used to house the power supply unit and the motor controller. The second receiving compartment is used to house at least one of the drive motor and the planetary gearbox. The third receiving compartment is used to house at least one of the powertrain's oil pump and the fine filter.

[0006] The bottom of the first receiving groove is stacked radially on the periphery of the second receiving groove. A first segment and a second segment of the bottom of the first receiving groove protrude from opposite sides of the periphery of the second receiving groove along a first direction, perpendicular to the axial direction of the drive motor and the stacking direction of the first and second receiving grooves. The inner side of the first segment faces one of the power supply device and the motor controller, and the inner side of the second segment faces the other of the power supply device and the motor controller. A third receiving groove is distributed on the outer side of the first segment and the outer side of the periphery of the second receiving groove.

[0007] This application addresses the problem of adjusting the powertrain housing structure based on the type of reducer to improve powertrain integration and reduce the powertrain's outer envelope size. By forming a first segment and a second segment by having the bottom of the first receiving slot protrude from both sides of the peripheral wall of the second receiving slot along a first direction, the first receiving slot's space is expanded, and the power supply device and motor controller are integrated into the first receiving slot. This allows the structure of the first receiving slot to adapt to the characteristic that the input and output ends of the planetary reducer are not radially offset along the drive motor, and reduces the space occupied by the powertrain in the axial and radial directions of the drive motor. Based on the positional relationship between the first segment and the second receiving slot, by adjusting the layout of the third receiving slot, at least one of an oil pump or a fine filter can be co-arranged in the unused space outside the first segment and outside the peripheral wall of the second receiving slot, which is beneficial for reducing the powertrain's outer envelope size.

[0008] In this embodiment, to integrate the power supply device and motor controller into the first receiving slot, it is necessary to expand the receiving space of the first receiving slot. The first receiving slot is typically stacked around the drive motor and the reducer. The structural improvement of the first receiving slot is influenced by the type of reducer. Based on the arrangement direction of the reducer's input and output ends, reducers can be classified into parallel-axis reducers and planetary reducers. The input and output ends of a parallel-axis reducer are radially offset along the drive motor. To expand the first receiving slot, it can be extended towards the output end of the parallel-axis reducer, reusing the outer space of the parallel-axis reducer's output end.

[0009] The architecture of a planetary reducer differs from that of a parallel shaft reducer; the output and input ends of a planetary reducer are arranged coaxially. In the case of a powertrain employing a planetary reducer, this embodiment introduces a first segment and a second segment at the bottom of the first receiving slot. The increased accommodating space in the first receiving slot is rationally distributed on different sides of the peripheral wall of the second receiving slot along the first direction. This facilitates avoidance of space between the powertrain and other adjacent structures within the electric vehicle, reducing the complexity of the powertrain's overall vehicle layout. The inner sides of the first and second segments face one and the other of the power supply unit and motor controller, respectively. This helps the power supply unit and motor controller to be spaced apart along the first direction within the first receiving slot, improving the integration of the powertrain and reducing the space occupied by the power supply unit and motor controller in the axial direction of the drive motor and in the stacking direction of the first and second receiving slots.

[0010] Because the first section extends the dimension of the first receiving groove along the first direction, a third receiving groove is also integrated into the powertrain housing to improve space utilization. This third receiving groove is located in the unused space outside the outer side of the first section and the outer side of the peripheral wall of the second receiving groove. At least one of the oil pump or fine filter housed in the third receiving groove is compactly arranged with the first and second receiving grooves, reducing the overall envelope size of the powertrain and helping to meet the requirements of powertrain miniaturization design. Furthermore, the third receiving groove's location on the outer side of the peripheral wall of the second receiving groove avoids encroaching on the mounting space of at least one of the drive motor and planetary reducer on the inner periphery of the second receiving groove, and avoids additional axial dimensions of the powertrain.

[0011] In one embodiment, the depth to which the first segment is recessed toward the second receiving groove along the stacking direction of the first and second receiving grooves is a first dimension. The depth to which the second segment is recessed toward the second receiving groove along the stacking direction of the first and second receiving grooves is a second dimension. The first dimension is smaller than the second dimension.

[0012] This embodiment of the application reduces the recess depth of the first segment relative to the second receiving groove, thereby providing more space for the third receiving groove on the outer side of the first segment and reducing the layout difficulty of the third receiving groove. This embodiment of the application increases the recess depth of the second segment relative to the second receiving groove, thereby compensating for the receiving space of the first receiving groove on the inner side of the second segment.

[0013] In one embodiment, the first segment protrudes relative to the peripheral wall of the second receiving groove along a first direction, and the opening of the third receiving groove intersects with the first direction.

[0014] In this embodiment, the opening of the third receiving groove is oriented in a direction corresponding to the extension direction of the third receiving groove. By adjusting the opening orientation of the third receiving groove to intersect with the protruding direction of the first segment, the length of the third receiving groove protruding relative to the first segment along the first direction can be reduced, which is beneficial for controlling the outer envelope size of the powertrain.

[0015] In one embodiment, the powertrain housing includes an oil pump housing and a fine filter housing, the oil pump housing accommodating an oil pump and the fine filter housing accommodating a fine filter.

[0016] The oil pump receiving tank and the fine filter receiving tank are located on the outer side of the first section and on the outer side of the peripheral wall of the second receiving tank. The arrangement direction of the oil pump receiving tank and the fine filter receiving tank intersects with the first direction.

[0017] This application embodiment solves the problem of how to adjust the layout of the oil pump receiving tank and the fine filter receiving tank within the limited space outside the first section and outside the second receiving tank when the oil pump receiving tank and the fine filter receiving tank are respectively used to accommodate the oil pump and the fine filter.

[0018] In this embodiment, the oil pump powers the oil to flow to the fine filter. The fine filter filters the oil, preventing impurities in the oil from affecting the normal operation of the powertrain. This embodiment arranges the oil pump housing and the fine filter housing on the same side of the first section and the same side of the peripheral wall of the second housing, resulting in a compact arrangement of the oil pump and fine filter. This reduces the difficulty of delivering oil from the oil pump to the fine filter and shortens the oil transport distance. By adjusting the arrangement direction of the oil pump housing and the fine filter housing, direct stacking along the first direction is avoided, controlling the space occupied by the oil pump housing and the fine filter housing in the first direction and reducing the outer envelope size of the powertrain.

[0019] In one embodiment, under the action of the oil pump, the oil in the second reservoir flows sequentially through the oil pump, the fine filter, and the heat exchanger of the powertrain. The heat exchanger is used to receive the coolant output from the outlet of the first reservoir to cool the oil flowing through the second reservoir.

[0020] The liquid outlet and the third receiving tank are located on the same side of the peripheral wall of the second receiving tank along the first direction.

[0021] This application embodiment solves the problem of how to coordinate the liquid outlet and the third receiving tank on the outer side of the first section and the outer side of the peripheral wall of the second receiving tank. The first receiving tank outputs coolant to the heat exchanger through the liquid outlet, and the second receiving tank outputs oil to the heat exchanger through the third receiving tank. The heat exchanger uses coolant to cool the oil, and the cooled oil is then transported to the second receiving tank to cool the drive motor or lubricate the planetary reducer. This application embodiment arranges the liquid outlet and the third receiving tank on the same side of the second receiving tank along the first direction, which can shorten the distance between the heat exchanger and the first and third receiving tanks, meet the heat exchanger's needs for receiving coolant and oil, and reuse the space on the outer side of the first section, the outer side of the second receiving tank, and the outer side of the third receiving tank.

[0022] In one embodiment, the arrangement direction of the liquid outlet and the third receiving tank intersects with the first direction.

[0023] In this embodiment, by adjusting the arrangement direction of the liquid outlet and the third receiving tank, the heat exchanger and the third receiving tank are prevented from being directly stacked along the first direction, thereby controlling the space occupied by the heat exchanger and the third receiving tank in the first direction and reducing the outer envelope size of the powertrain.

[0024] In one embodiment, the inlet of the first receiving tank is used to introduce coolant into the internal flow channel of the first receiving tank. The internal flow channel of the first receiving tank is used to transfer coolant to sequentially cool the power supply device and the motor controller. The outlet is used to receive the coolant from the internal flow channel of the first receiving tank.

[0025] The inner side of the first section faces the motor controller, and the inner side of the second section faces the power supply device. The liquid outlet is arranged adjacent to the first section along the stacking direction of the first and second receiving tanks, and the liquid inlet is arranged adjacent to the second section along the stacking direction of the first and second receiving tanks.

[0026] This application addresses the problem of how to meet the heat dissipation requirements of a power supply device and a motor controller by adjusting the positions of the inlet and outlet when integrating them in a first receiving tank. The heat generated by the power supply device is typically less than that of the motor controller, and the temperature rise of the coolant after heat exchange with the power supply device alone is less than that after heat exchange with the motor controller alone. By adjusting the inlet to be adjacent to the second section facing the power supply device and the outlet to be adjacent to the first section facing the motor controller, the coolant can flow sequentially through the power supply device and the motor controller. The arrangement of the inlet and outlet follows the arrangement direction of the power supply device and the motor controller, which simplifies the layout of the internal flow channel while avoiding excessively high coolant temperatures downstream and improving the heat dissipation efficiency of the coolant. By adjusting the arrangement direction of the inlet with the second section and the outlet with the first section, the inlet and outlet can respectively reuse the space occupied by the second and first sections along the first direction.

[0027] In one embodiment, the length by which the outlet protrudes relative to the peripheral wall of the second receiving tank is less than the length by which the first segment protrudes relative to the peripheral wall of the second receiving tank. The length by which the inlet protrudes relative to the peripheral wall of the second receiving tank is less than or equal to the length by which the second segment protrudes relative to the peripheral wall of the second receiving tank.

[0028] In this embodiment, by controlling the length of the protrusion of the liquid outlet and liquid inlet relative to the peripheral wall of the second receiving tank, the additional length of the liquid outlet and liquid inlet along the first receiving tank in the first direction can be avoided. Furthermore, by reducing the length of the protrusion of the liquid outlet relative to the second receiving tank, more installation space is provided for the heat exchanger on the outer side of the first section and the outer side of the second receiving tank.

[0029] In one embodiment, a protrusion in the first receiving groove protrudes from the second section toward the power supply device. The protrusion is used to integrate a first flow channel, which is used to receive coolant transmitted from the inlet to cool the power supply device.

[0030] The protrusions and liquid inlets along the stacking direction of the first and second receiving tanks are distributed on the same side of the second section, and the extension direction of the protrusions intersects with the first direction.

[0031] This application embodiment solves the problem of how to adjust the layout of the internal flow channels of the first receiving tank based on the relative position of the inlet and the second section. The second section protrudes relative to the tank wall of the second receiving tank, and the first flow channels are distributed inside the protrusion of the second section, which helps to reduce the processing difficulty of the first receiving tank. The inner side of the second section faces the power supply device, and the protrusion and the inlet are distributed on the inner side of the second section, which can shorten the distance between the coolant and the power supply device and improve the cooling efficiency of the coolant on the power supply device. By adjusting the extension direction of the protrusion to intersect with the first direction, the overlapping area of ​​the first flow channel and the power supply device can be expanded, and the heat exchange time between the coolant and the power supply device can be extended.

[0032] In one embodiment, the motor controller includes a heat sink, a power module, and a capacitor module. The heat sink receives coolant from the internal flow channels of a first receiving tank to cool the power module. The capacitor module is stacked between the heat sink and the first segment along the stacking direction of the first and second receiving tanks.

[0033] The interface of the first receiving tank is used to transfer coolant from the radiator to the outlet. The interface protrudes from the bottom of the first receiving tank toward the radiator and is arranged adjacent to the first section along the first direction. One end of the interface along the stacking direction of the first and second receiving tanks is located on one side of the first section along with the radiator, and the other end of the interface along the stacking direction of the first and second receiving tanks is located on the other side of the first section along with the outlet.

[0034] This application addresses the problem of adapting the interface of the first receiving tank to the positional relationship between the radiator, the outlet, and the first segment. The motor controller achieves AC / DC conversion by switching the power module's on / off state. Frequent on / off switching of the power module generates heat. Since the power module is located on the side of the capacitor module away from the first segment, receiving coolant through the radiator to cool the power module helps reduce the difficulty of heat exchange between the coolant and the power module, and simplifies the structure of the first receiving tank. The radiator is used to connect to the outlet through the interface of the first receiving tank. One end of the interface protrudes towards the radiator relative to the first segment, reducing the difficulty of receiving coolant from the radiator. The other end of the interface is located on the side of the first segment away from the radiator. This allows the outlet and the third receiving tank to be positioned on the same side of the first segment and the same side of the peripheral wall of the second receiving tank, facilitating the heat exchanger's reuse of the space outside the first and second receiving tanks and improving space utilization. The interface is arranged adjacent to the first segment along the first direction, which can avoid the interface occupying the space of the first segment used to accommodate the supporting capacitor module and reduce the difficulty of integrating the power supply device and motor controller in the first accommodating slot.

[0035] In one embodiment, the first AC transmission component of the motor controller is used to output three-phase AC power to the second AC transmission component of the drive motor, and one end of the terminal block of the powertrain is used to fixally connect to the first AC transmission component.

[0036] The first wall of the first receiving groove extends from the first section to the second section along the first direction, and the first mounting holes of the first receiving groove are distributed on the first groove wall. The first mounting holes are opposite to the gap between the motor controller and the power supply device along the first direction, and one end of the terminal block is used to extend through the first mounting holes into the gap between the motor controller and the power supply device.

[0037] This application addresses the problem of how to utilize the gap between the power supply device and the motor controller along a first direction to accommodate a first AC transmission component, thereby improving space utilization. The first and second sections expand the accommodating space of the first accommodating slot along the first direction, allowing the power supply device and motor controller to be arranged at intervals along the first direction, which helps reduce mutual interference between them. The first AC transmission component of the motor controller needs to be electrically connected to the second AC transmission component of the drive motor outside the first accommodating slot via a terminal block. To improve the space utilization of the first accommodating slot, one end of the terminal block can be accommodated using the gap between the power supply device and the motor controller along the first direction. Based on the relative positions of the power supply device and the motor controller, this application arranges the first mounting holes for mounting the terminal block on the first wall of the first accommodating slot. The first wall is arranged along the axial direction of the drive motor and the power supply device and motor controller, allowing the first mounting holes distributed on the first wall to directly face the gap between the power supply device and the motor controller along the axial direction of the drive motor. One end of the terminal block is distributed in the gap between the motor controller and the power supply device, avoiding interference between the first AC transmission component and other functional modules, reducing the detours and intersections of the first AC transmission component within the first accommodating slot, and helping to reduce the assembly complexity of the powertrain.

[0038] In one embodiment, a second mounting hole in the first receiving slot is used to mount a first connector, and a third mounting hole in the first receiving slot is used to mount a second connector. Each of the first and second connectors is used for electrical connection between a power supply device and a motor controller.

[0039] The second wall of the first receiving groove is arranged on both sides of the first and second sections along the axial direction of the drive motor. Second mounting holes are located on the first groove wall, and third mounting holes are located on the second groove wall.

[0040] In this embodiment, integrating the power supply device and motor controller within the first receiving slot requires consideration of the connector layout for electrical connections to both devices. The second and third mounting holes in the first receiving slot are used to mount the first connector and the second connector, respectively. The arrangement of the second and third mounting holes is perpendicular to the arrangement direction of the power supply device and the motor controller, facilitating the sharing of the first and second connectors. The second and third mounting holes are distributed on different walls of the first receiving slot, reducing mutual interference between the first and second connectors.

[0041] In one embodiment, the second receiving slot is used to accommodate a drive motor, one end of the second AC transmission component extends out of the second receiving slot toward the first mounting hole, and the other end of the terminal block is used to fix one end of the second AC transmission component. Along the stacking direction of the first and second receiving slots, the distance between the first mounting hole and the second receiving slot is smaller than the distance between the second mounting hole and the second receiving slot.

[0042] In this embodiment, the two ends of the terminal block are used to connect the first AC transmission component of the motor controller and the second AC transmission component of the drive motor, respectively. Therefore, the position of the first mounting hole needs to take into account the connection difficulty between the two ends of the terminal block and the two AC transmission components. When the gap between the first mounting hole and the power supply device and the motor controller is opposite, the wiring operation of the second AC transmission component of the drive motor can be simplified by adjusting the distance between the first mounting hole and the second receiving slot.

[0043] In one embodiment, the second mounting hole and the third mounting hole are distributed on both sides of either the first segment and the second segment along the axial direction of the drive motor.

[0044] In this embodiment, the first mounting hole needs to be aligned with the gap between the motor controller and the power supply device. The first and second segments are located at the edge of the bottom of the first receiving groove. Arranging the second and third mounting holes on both sides of the first or second segment along the axial direction of the drive motor provides space for the layout of the first mounting hole and reduces interference between the first connector and the first AC transmission component.

[0045] Secondly, embodiments of this application provide an electric vehicle, which includes a power battery and a powertrain as described in any embodiment of the first aspect, wherein the powertrain is used to receive power from the power battery and to drive the wheels of the electric vehicle.

[0046] In the embodiments of this application, the increased integration and reduced outer size of the powertrain help to reduce the difficulty of powertrain layout in electric vehicles, increase the cabin space of electric vehicles, and improve the driving experience. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0048] Figure 1 This is a schematic diagram of an electric vehicle provided in an embodiment of this application; Figure 2 This is a schematic diagram of the powertrain and wheels provided in an embodiment of this application; Figure 3 This is a partial schematic diagram of the powertrain provided in an embodiment of this application; Figure 4 This is a schematic diagram of the powertrain provided in the embodiments of this application; Figure 5 This is a cross-sectional view of the powertrain provided in the embodiments of this application; Figure 6 This is a schematic diagram of the powertrain provided in the embodiments of this application; Figure 7 This is a cross-sectional view of the powertrain provided in the embodiments of this application; Figure 8 This is a partial structural schematic diagram of the powertrain provided in an embodiment of this application; Figure 9 This is a schematic diagram of the powertrain provided in the embodiments of this application.

[0049] Explanation of reference numerals in the attached figures: R, radial direction of the drive motor; O, axial direction of the drive motor; A, first direction; B, second direction; L1, first dimension; L2, second dimension; 1. Electric vehicle; 10. Powertrain; 20. Power battery; 30. Wheels; 40. Frame; 100. Power supply device; 110. Second circuit board; 200, Motor controller; 210, Heat sink; 220, Power module; 230, Capacitor module; 240, First AC transmission component; First circuit board; 250; 300. Drive motor; 310. Second AC transmission component; 400. Planetary reducer; 410. Planetary gear set; 411. Sun gear; 412. Planetary gears; 413. Planet carrier; 414. Ring gear; 500a, oil pump; 500b, fine filter; 500c, heat exchanger; 600. Casing; 610. First receiving tank; 611. First section; 612. Second section; 613. Liquid outlet; 614. Liquid inlet; 615. Protrusion; 6151. First flow channel; 616a. First interface; 616b. Second interface; 617a. First tank wall; 617b. Second tank wall; 617c. Third tank wall; 617d. Fourth tank wall; 618a. First mounting hole; 618b. Second mounting hole; 618c. Third mounting hole; 620. Second receiving tank; 630, Third receiving tank; 630a, Oil pump receiving tank; 630b, Fine filter receiving tank; 700. Terminal block; 800a, First connector; 800b, Second connector; 900a, differential; 900b, half shaft. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0051] For ease of understanding, the relevant technical terms involved in the embodiments of this application will be explained and described below.

[0052] Perpendicular: The perpendicularity defined in the embodiments of this application is not limited to an absolute perpendicular intersection relationship. It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness.

[0053] Parallelism: The parallelism defined in the embodiments of this application is not limited to absolute parallelism. It is permissible for non-absolute parallelism to exist due to factors such as assembly tolerance, design tolerance, and structural flatness.

[0054] With increasing global focus on energy conservation and emission reduction, electric vehicles have become a crucial development direction for the automotive industry due to their advantages such as zero emissions and low noise. As a vital component of electric vehicles, the powertrain directly impacts the overall vehicle's power performance, energy efficiency, and reliability. Currently, powertrains are evolving towards a highly modular design.

[0055] To improve the integration of the powertrain, this application increases the accommodating space of the first accommodating slot of the powertrain, thereby integrating the power supply device and motor controller of the powertrain into the first accommodating slot. The slot opening of the first accommodating slot intersects with the slot opening of the second accommodating slot of the powertrain, and the bottom of the first accommodating slot overlaps the peripheral wall of the second accommodating slot. The second accommodating slot is used to accommodate at least one of the drive motor or planetary reducer of the powertrain. The structural design of the first accommodating slot needs to consider the coaxial arrangement of the input and output ends of the planetary reducer. The bottom of the first accommodating slot protrudes from both sides of the peripheral wall of the second accommodating slot along the first direction to form a first section and a second section, respectively, which can distribute the increased accommodating space required by the first accommodating slot to the inner side of the first section and the inner side of the second section. The third accommodating slot of the powertrain is used to accommodate at least one of the oil pump or fine filter. By adjusting the positional relationship between the third accommodating slot and the first and second accommodating slots, this application can reuse the space on the outer side of the first section and the outer side of the peripheral wall of the second accommodating slot to accommodate at least one of the oil pump or fine filter, which is beneficial to improving space utilization and reducing the outer envelope size of the powertrain.

[0056] Figure 1 This is a schematic diagram of the electric vehicle 1 provided in the embodiments of this application.

[0057] like Figure 1 As shown, the electric vehicle 1 in this embodiment of the application includes a powertrain 10, a power battery 20, wheels 30 and a frame 40. The frame 40 is used to fix the powertrain 10 and the power battery 20, and the power battery 20 is used to supply power to the powertrain 10.

[0058] In this embodiment, electric vehicle 1 refers to a wheeled device driven or towed by a power unit. The frame 40 is the structural skeleton of electric vehicle 1, capable of bearing the loads from the internal and external environments. The powertrain 10 is the power source for electric vehicle 1, and is used to drive the wheels 30 of electric vehicle 1.

[0059] It should be noted that, Figure 1 The electric vehicle 1 is shown schematically only, including the powertrain 10, power battery 20, wheels 30 and frame 40, and does not represent the specific structure, size and positional relationship of the powertrain 10, power battery 20, wheels 30 and frame 40.

[0060] Figure 2 This is a schematic diagram of the powertrain 10 and wheels 30 provided in the embodiments of this application.

[0061] like Figure 2As shown, the powertrain 10 of this embodiment includes a power supply unit 100, a motor controller 200, a drive motor 300, and a reducer. The power supply unit 100 outputs direct current to power the electric vehicle's battery or load. The motor controller 200 outputs alternating current to control the drive motor 300. The drive motor 300 converts electrical energy into mechanical energy to generate driving torque to drive the reducer. The reducer is used to drive the wheels 30.

[0062] In one embodiment, the power supply device 100 includes at least one of an on-board charger and a DC-DC converter. The on-board charger is used to convert AC power from the power grid into DC power, or to directly transmit DC power to charge the power battery or to supply power to the vehicle's load. The DC-DC converter is used to convert DC power of one voltage level to DC power of another voltage level to supply power to the vehicle's load.

[0063] In one embodiment, the drive motor 300 includes a motor shaft, a motor rotor, and a motor stator. The motor shaft is used to fixably connect to the inner circumferential surface of the motor rotor. The windings of the motor stator are used to receive alternating current transmitted by the motor controller 200. After receiving the alternating current provided by the motor controller 200, the motor stator drives the motor rotor to rotate, thereby driving the motor shaft to rotate.

[0064] Figure 3 This is a partial schematic diagram of the powertrain 10 provided in an embodiment of this application.

[0065] In one embodiment, such as Figure 2 and Figure 3 As shown, the reducer of the powertrain 10 is a planetary reducer 400. The input end of the planetary reducer 400 is used for drive connection to the drive motor 300, and the output end of the planetary reducer 400 is used for drive connection to the wheels of the electric vehicle. The input and output ends of the planetary reducer 400 are arranged along the axial direction of the drive motor 300.

[0066] In one embodiment, such as Figure 3 As shown, the planetary gear reducer 400 includes a sun gear 411, planet gears 412, a planet carrier 413, and a ring gear 414. The planet gears 412 are used to drive at least one of the sun gear 411 and the ring gear 414. The planet gears 412 are fitted onto a planetary shaft, and the planet carrier 413 is used to drive the planet gears 412 through the planetary shaft. In one embodiment, the planetary gear reducer 400 may include a single planetary gear set 410 or multiple planetary gear sets 410 arranged along the axial direction of the drive motor 300.

[0067] In one embodiment, the input end of the planetary reducer 400 is the sun gear 411 in the planetary set 410 surrounding the outer periphery of the motor shaft. In another embodiment, the planetary reducer 400 is used to drive and connect wheels via a differential 900a or a half-shaft 900b, and the output end of the planetary reducer 400 is the planet carrier 413 or the ring gear 414 in the planetary set 410 that drives and connects the differential 900a or the half-shaft 900b.

[0068] It should be noted that, Figure 2 The powertrain 10 is shown schematically only, including the power supply unit 100, motor controller 200, drive motor 300 and planetary reducer 400. It does not represent the specific structure, size and positional relationship of the on-board power supply unit 100, motor controller 200, drive motor 300, planetary reducer 400 and wheels 30. Figure 3 The planetary reducer 400 is only shown schematically, and the embodiments of this application do not specifically limit the type and structure of the planetary reducer 400.

[0069] The powertrain 10 provided in the embodiments of this application is described in detail below.

[0070] Figure 4 This is a schematic diagram of the powertrain 10 provided in the embodiments of this application. Figure 5 This is a cross-sectional view of the powertrain 10 provided in the embodiments of this application. Figure 5 The structure of the power supply device 100, motor controller 200 and drive motor 300 in the powertrain 10 has been simplified.

[0071] like Figure 4 As shown, the housing 600 of the powertrain 10 includes a first receiving groove 610, a second receiving groove 620, and a third receiving groove 630. The first receiving groove 610 is used to receive the power supply unit 100 and the motor controller 200. The second receiving groove 620 is used to receive at least one of the drive motor and the planetary gear reducer. Figure 4 and Figure 5 As shown, the third receiving tank 630 is used to receive at least one of the oil pump 500a and the fine filter 500b of the powertrain 10.

[0072] like Figure 5As shown, the bottom of the first receiving groove 610 is stacked on the peripheral wall of the second receiving groove 620 along the radial direction R of the drive motor 300. The first segment 611 and the second segment 612 of the bottom of the first receiving groove 610 protrude from both sides of the peripheral wall of the second receiving groove 620 along a first direction A, which is perpendicular to the axial direction O of the drive motor 300 and the stacking direction of the first receiving groove 610 and the second receiving groove 620. The inner side of the first segment 611 faces one of the power supply device 100 and the motor controller 200, and the inner side of the second segment 612 faces the other of the power supply device 100 and the motor controller 200. The third receiving groove 630 is distributed on the outer side of the first segment 611 and the outer side of the peripheral wall of the second receiving groove 620. For simplicity, the stacking direction of the first receiving groove 610 and the second receiving groove 620 is denoted as the second direction B.

[0073] In this embodiment, to integrate the power supply device 100 and the motor controller 200 into the first receiving slot 610, it is necessary to expand the receiving space of the first receiving slot 610. The first receiving slot 610 is typically stacked on top of the drive motor and the reducer. The structural improvement of the first receiving slot 610 is influenced by the type of reducer. Based on the arrangement direction of the reducer's input and output ends, reducers can be classified as parallel-axis reducers and planetary reducers 400. The input and output ends of the parallel-axis reducer are radially offset along the drive motor. To expand the first receiving slot, it can be extended towards the output end of the parallel-axis reducer, reusing the outer space of the parallel-axis reducer's output end.

[0074] The planetary reducer 400 has a different architecture from the parallel shaft reducer; its output and input ends are arranged coaxially. In the case of the powertrain 10 using the planetary reducer 400, this embodiment introduces a first segment 611 and a second segment 612 at the bottom of the first receiving slot 610. The increased accommodating space in the first receiving slot 610 is rationally arranged on different sides of the peripheral wall of the second receiving slot 620 along the first direction A, which facilitates the avoidance of space between the powertrain 10 and structures such as the electric vehicle's steering gear, reducing the layout difficulty of the powertrain 10 within the vehicle. The inner sides of the first segment 611 and the second segment 612 face one and the other of the power supply device 100 and the motor controller 200, respectively, which helps the power supply device 100 and the motor controller 200 to be arranged at intervals along the first direction A within the first receiving slot 610, improving the integration of the powertrain 10 and reducing the space occupied by the power supply device 100 and the motor controller 200 in the axial direction O and the second direction B of the drive motor 300, achieving a compact layout within a limited space.

[0075] Since the first segment 611 extends the dimension of the first receiving groove 610 along the first direction A, to improve space utilization, the housing 600 of the powertrain 10 also integrates a third receiving groove 630. The third receiving groove 630 is distributed in the unused space outside the first segment 611 and the outer side of the groove peripheral wall of the second receiving groove 620. At least one of the oil pump 500a or fine filter 500b accommodated in the third receiving groove 630 is arranged compactly with the first receiving groove 610 and the second receiving groove 620, which can reduce the outer envelope size of the powertrain 10 and help meet the miniaturization design requirements of the powertrain 10. In addition, the third receiving groove 630 is distributed on the outer side of the groove peripheral wall of the second receiving groove 620, which can avoid encroaching on the installation space of at least one of the drive motor 300 and planetary reducer 400 on the inner peripheral side of the second receiving groove 620, and avoids additionally increasing the axial dimension of the powertrain 10.

[0076] In one embodiment, such as Figure 4 As shown, the opening of the second receiving groove 620 is parallel to the axial direction O of the drive motor 300, and the opening of the first receiving groove 610 intersects with the opening of the second receiving groove 620.

[0077] In one embodiment, such as Figure 5 As shown, a portion of the bottom of the first receiving groove 610 reuses a portion of the peripheral wall of the second receiving groove 620. The first segment 611 and the second segment 612 are distributed on both sides of the portion of the bottom of the first receiving groove 610 along the first direction A. The peripheral wall of the second receiving groove 620 surrounds at least one of the drive motor or planetary reducer. In this embodiment, a portion of the bottom of the first receiving groove 610 surrounds the outer periphery of at least one of the drive motor or planetary reducer. Based on the positional relationship between the first segment 611, the second segment 612, and the portion of the bottom of the first receiving groove 610, the inner sides of the first segment 611 and the second segment 612 face one and the other of the power supply device 100 and the motor controller 200, allowing the power supply device 100 and the motor controller 200 to avoid the highest point of the portion of the bottom of the first receiving groove 610 along the second direction B, thus reducing the size of the powertrain 10 along the second direction B. In one embodiment, the second direction B is parallel to the direction of gravity.

[0078] In one embodiment, such as Figure 5 As shown, the depth of the recess in the first segment 611 along the second direction B toward the second receiving groove 620 is the first dimension L1. The depth of the recess in the second segment 612 along the second direction B toward the second receiving groove 620 is the second dimension L2. The first dimension L1 is smaller than the second dimension L2.

[0079] This embodiment of the application reduces the recess depth of the first segment 611 relative to the second receiving groove 620, thereby providing more space for the third receiving groove 630 on the outer side of the first segment 611 and reducing the layout difficulty of the third receiving groove 630. This embodiment of the application increases the recess depth of the second segment 612 relative to the second receiving groove 620, thereby compensating for the receiving space of the first receiving groove 610 on the inner side of the second segment 612.

[0080] In one embodiment, such as Figure 5 As shown, the first segment 611 protrudes relative to the peripheral wall of the second receiving groove 620 along the first direction A, and the opening of the third receiving groove 630 intersects with the first direction A.

[0081] In this embodiment, the opening of the third receiving groove 630 is oriented in the direction of extension of the third receiving groove 630. By adjusting the opening of the third receiving groove 630 to intersect with the protruding direction of the first segment 611, the length of the third receiving groove 630 protruding relative to the first segment 611 along the first direction A can be reduced, which is beneficial for controlling the outer envelope size of the powertrain 10.

[0082] In one embodiment, such as Figure 4 As shown, the opening of the third receiving groove 630 is oriented parallel to the opening of the second receiving groove 620. This design facilitates the reuse of the axial space occupied by the second receiving groove 620 by the third receiving groove 630.

[0083] In one embodiment, when the third receiving tank 630 is used only to receive the oil pump 500a, the third receiving tank 630 can be the oil pump receiving tank 630a. When the third receiving tank 630 is used only to receive the fine filter 500b, the third receiving tank 630 can be the fine filter receiving tank 630b. In one embodiment, as... Figure 4 and Figure 5 As shown, the housing 600 of the powertrain 10 includes two third receiving slots 630, which are respectively an oil pump receiving slot 630a and a fine filter receiving slot 630b, and are used to receive the oil pump 500a and the fine filter 500b, respectively.

[0084] When the oil pump 500a and the fine filter 500b are distributed in different third receiving tanks 630, it is necessary to consider how the oil pump 500a and the fine filter 500b are arranged outside the first receiving tank 610 and the second receiving tank 620.

[0085] In one embodiment, such as Figure 4 and Figure 5 As shown, the housing 600 of the powertrain 10 includes an oil pump receiving groove 630a and a fine filter receiving groove 630b. The oil pump receiving groove 630a is used to receive an oil pump 500a, and the fine filter receiving groove 630b is used to receive a fine filter 500b. Figure 5As shown, the oil pump receiving tank 630a and the fine filter receiving tank 630b are distributed on the outer side of the first section 611 and the outer side of the tank periphery of the second receiving tank 620. The arrangement direction of the oil pump receiving tank 630a and the fine filter receiving tank 630b intersects with the first direction A.

[0086] In this embodiment, the oil pump 500a provides power to the oil, causing it to flow to the fine filter 500b. The fine filter 500b filters the oil, preventing impurities in the oil from affecting the normal operation of the powertrain 10. This embodiment arranges the oil pump receiving tank 630a and the fine filter receiving tank 630b on the same side of the first section 611 and the same side of the peripheral wall of the second receiving tank 620, making the oil pump 500a and the fine filter 500b compact. This reduces the difficulty of pumping oil from the oil pump 500a to the fine filter 500b and shortens the oil transmission distance. By adjusting the arrangement direction of the oil pump receiving tank 630a and the fine filter receiving tank 630b, directly stacking them along the first direction A is avoided, controlling the space occupied by the oil pump receiving tank 630a and the fine filter receiving tank 630b in the first direction A, thus reducing the outer envelope size of the powertrain 10.

[0087] In one embodiment, such as Figure 4 As shown, under the action of oil pump 500a, the oil in the second receiving tank 620 flows sequentially through oil pump 500a, fine filter 500b, and heat exchanger 500c of power assembly 10. Figure 5 As shown, heat exchanger 500c is used to receive the coolant output from the outlet 613 of the first receiving tank 610 to cool the oil flowing through the second receiving tank 620. Figure 5 As shown, the liquid outlet 613 and the third receiving tank 630 are distributed on the same side of the peripheral wall of the second receiving tank 620 along the first direction A.

[0088] In this embodiment, the first receiving tank 610 outputs coolant to the heat exchanger 500c through the outlet 613, and the second receiving tank 620 outputs oil to the heat exchanger 500c through the third receiving tank 630. The heat exchanger 500c uses the coolant to cool the oil, and the cooled oil is then transported to the second receiving tank 620 to cool the drive motor 300 or lubricate the planetary reducer 400. In this embodiment, the outlet 613 and the third receiving tank 630 are arranged on the same side of the second receiving tank 620 along the first direction A. This shortens the distance between the heat exchanger 500c and the first receiving tank 610 and the third receiving tank 630, meeting the needs of the heat exchanger 500c to receive coolant and oil, and also allows for the reuse of the space outside the first section 611, the second receiving tank 620, and the third receiving tank 630.

[0089] In one embodiment, such as Figure 5As shown, the outlet 613 and the oil pump receiving tank 630a and the fine filter receiving tank 630b are distributed on the same side of the peripheral wall of the second receiving tank 620 along the first direction A. When the housing 600 of the powertrain 10 uses the oil pump receiving tank 630a and the fine filter receiving tank 630b to accommodate the oil pump 500a and the fine filter 500b respectively, by adjusting the relative position of the outlet 613 and the oil pump receiving tank 630a and the fine filter receiving tank 630b, it is helpful to achieve the coordinated arrangement of the heat exchanger 500c with the oil pump 500a and the fine filter 500b outside the first receiving tank 610 and the second receiving tank 620 when the first receiving tank 610 is expanded by using the first section 611 and the second section 612, thereby controlling the outer envelope size of the powertrain 10.

[0090] In one embodiment, such as Figure 5 As shown, the arrangement direction of the liquid outlet 613 and the third receiving tank 630 intersects with the first direction A.

[0091] In this embodiment, by adjusting the arrangement direction of the liquid outlet 613 and the third receiving tank 630, the heat exchanger 500c and the third receiving tank 630 are prevented from being directly stacked along the first direction A, thereby controlling the space occupied by the heat exchanger 500c and the third receiving tank 630 in the first direction A and reducing the outer envelope size of the powertrain 10.

[0092] In one embodiment, the arrangement direction of any two of the liquid outlet 613, the oil pump receiving tank 630a, and the fine filter receiving tank 630b intersects with the first direction A.

[0093] In this embodiment, the liquid outlet 613, the oil pump receiving tank 630a, and the fine filter receiving tank 630b are distributed on the same side of the second receiving tank 620 along the first direction A. By adjusting the arrangement direction of the liquid outlet 613, the oil pump receiving tank 630a, and the fine filter receiving tank 630b to intersect with the first direction A, the heat exchanger 500c, the oil pump receiving tank 630a, and the fine filter receiving tank 630b can be avoided from being directly stacked along the first direction A, which helps to reduce the length of the heat exchanger 500c, the oil pump receiving tank 630a, and the fine filter receiving tank 630b protruding relative to the first segment 611.

[0094] In one embodiment, the arrangement direction of any two of the liquid outlet 613, the oil pump receiving tank 630a, and the fine filter receiving tank 630b intersects the axial direction O of the drive motor 300.

[0095] In this embodiment, the outlet 613, the oil pump receiving tank 630a, and the fine filter receiving tank 630b are distributed on the same side of the second receiving tank 620 along the first direction A. By adjusting the arrangement direction of the outlet 613, the oil pump receiving tank 630a, and the fine filter receiving tank 630b, one of them can be prevented from protruding relative to the second receiving tank 620 along the axial direction O of the drive motor 300, which helps to reduce the axial space occupied by the outlet 613, the oil pump receiving tank 630a, and the fine filter receiving tank 630b.

[0096] A first segment 611 and a second segment 612 are introduced into the bottom of the first receiving tank 610. Based on the positional relationship between the first segment 611, the second segment 612 and the second receiving tank 620, in addition to optimizing the layout of the components distributed on the outside of the first receiving tank 610, the delivery of coolant inside the first receiving tank 610 and the specific arrangement of the power supply device 100 and the motor controller 200 can also be adjusted so that the first receiving tank 610 can integrate the power supply device 100 and the motor controller 200 more efficiently.

[0097] Figure 6 This is a schematic diagram of the powertrain 10 provided in the embodiments of this application. Figure 7 This is a cross-sectional view of the powertrain 10 provided in the embodiments of this application. Figure 5 and Figure 7 Section lines were omitted. Figure 7 The structure of the drive motor 300 has been simplified.

[0098] In one embodiment, such as Figure 6 and Figure 7 As shown, the inlet 614 of the first receiving tank 610 is used to input coolant into the internal flow channel of the first receiving tank 610. The internal flow channel of the first receiving tank 610 is used to transfer coolant to sequentially cool the power supply device 100 and the motor controller 200. Figure 5 As shown, the outlet 613 is used to receive coolant from the internal flow channel of the first receiving tank 610. The inner side of the first section 611 faces the motor controller 200, and the inner side of the second section 612 faces the power supply device 100. Figure 5 As shown, the outlet 613 and the first segment 611 are arranged adjacent to each other along the second direction B. Figure 7 As shown, the liquid inlet 614 and the second section 612 are arranged adjacent to each other along the second direction B.

[0099] In this embodiment, the heat generated by the power supply device 100 is generally less than that of the motor controller 200, and the temperature rise of the coolant after heat exchange with the power supply device 100 alone is less than that of the coolant after heat exchange with the motor controller 200 alone. By adjusting the inlet 614 to be adjacent to the second section 612 facing the power supply device 100, and the outlet 613 to be adjacent to the first section 611 facing the motor controller 200, the coolant can flow sequentially through the power supply device 100 and the motor controller 200. The arrangement direction of the inlet 614 and the outlet 613 follows the arrangement direction of the power supply device 100 and the motor controller 200, which simplifies the layout of the internal flow channel while avoiding excessively high coolant temperature downstream of the internal flow channel and improving the heat dissipation efficiency of the coolant. By adjusting the arrangement direction of the inlet 614 and the second segment 612, and the arrangement direction of the outlet 613 and the first segment 611, the inlet 614 and the outlet 613 can respectively reuse the space occupied by the second segment 612 and the first segment 611 along the first direction A.

[0100] In one embodiment, the first receiving groove 610 further includes a plurality of mounting holes, each for mounting an electrical connector. The inlet 614 and each mounting hole are distributed on different sides of the second segment 612, and the outlet 613 and each mounting hole are distributed on different sides of the first segment 611. The inlet 614 and outlet 613 are adjacent to the edge region of the bottom of the first receiving groove 610, which helps to avoid the inlet 614 and outlet 613 from being positioned relative to the mounting holes, thus preventing the coolant transfer from negatively impacting the electrical connection.

[0101] In one embodiment, such as Figure 5 As shown, the length of the outlet 613 protruding relative to the peripheral wall of the second receiving tank 620 is less than the length of the first segment 611 protruding relative to the peripheral wall of the second receiving tank 620. Figure 7 As shown, the length of the liquid inlet 614 protruding from the peripheral wall of the second receiving tank 620 is less than or equal to the length of the second segment 612 protruding from the peripheral wall of the second receiving tank 620.

[0102] In this embodiment, by controlling the length of the protrusion of the outlet 613 and inlet 614 relative to the peripheral wall of the second receiving tank 620, the dimensions of the first receiving tank 610 along the first direction A can be avoided. Furthermore, by reducing the length of the protrusion of the outlet 613 relative to the second receiving tank 620, more installation space is provided for the heat exchanger 500c on the outer side of the first section 611 and the outer side of the second receiving tank 620.

[0103] In one embodiment, such as Figure 5 As shown, the protrusion 615 of the first receiving groove 610 protrudes from the second section 612 toward the power supply device 100. Figure 7As shown, protrusion 615 is used to integrate the first flow channel 6151, which is used to receive the coolant cooling power supply device 100 transmitted from the inlet 614. Figure 7 As shown, the protrusion 615 and the liquid inlet 614 along the second direction B are distributed on the same side of the second section 612, and the extension direction of the protrusion 615 intersects with the first direction A.

[0104] In this embodiment, the second segment 612 protrudes from the wall of the second receiving groove 620, and the first flow channel 6151 is distributed inside the protrusion 615 of the second segment 612, which helps to reduce the processing difficulty of the first receiving groove 610. The inner side of the second segment 612 faces the power supply device 100, and the protrusion 615 and the liquid inlet 614 are distributed on the inner side of the second segment 612, which can shorten the distance between the coolant and the power supply device 100 and improve the cooling efficiency of the coolant on the power supply device 100. By adjusting the extension direction of the protrusion 615 to intersect with the first direction A, the area of ​​overlap between the first flow channel 6151 and the power supply device 100 can be expanded, and the heat exchange time between the coolant and the power supply device 100 can be extended.

[0105] In one embodiment, such as Figure 5 As shown, the motor controller 200 includes a heat sink 210, a power module 220, and a capacitor module 230. The heat sink 210 is used to receive coolant from the internal flow channels of the first receiving tank 610 to cool the power module 220. The capacitor module 230 is stacked between the heat sink 210 and the first segment 611 along the second direction B.

[0106] like Figure 5 As shown, the first interface 616a of the first receiving tank 610 is used to transfer coolant from the radiator 210 to the outlet 613. The first interface 616a protrudes from the bottom of the first receiving tank 610 toward the radiator 210, and is arranged adjacent to the first segment 611 along the first direction A. Along the second direction B, one end of the first interface 616a and the radiator 210 are located on one side of the first segment 611, and the other end of the first interface 616a and the outlet 613 are located on the other side of the first segment 611.

[0107] In this embodiment, the motor controller 200 achieves AC / DC conversion by switching the power module 220 between its on and off states. Frequent switching of the power module 220 on and off generates heat. Since the power module 220 is located on the side of the capacitor module 230 away from the first segment 611, the radiator 210 receives coolant to cool the power module 220, which helps reduce the difficulty of heat exchange between the coolant and the power module 220 and simplifies the structure of the first receiving tank 610. The radiator 210 is used to connect to the outlet 613 through the first interface 616a of the first receiving tank 610. One end of the first interface 616a protrudes towards the radiator 210 relative to the first segment 611, reducing the difficulty for the first interface 616a to receive coolant from the radiator 210. The other end of the first interface 616a is located on the side of the first segment 611 away from the radiator 210. This allows the first interface 616a to be connected to the liquid outlet 613, while the liquid outlet 613 and the third receiving tank 630 are positioned on the same side of the first segment 611 and the same side of the peripheral wall of the second receiving tank 620. This facilitates the heat exchanger 500c reusing the space outside the first receiving tank 610 and the second receiving tank 620, improving space utilization. The first interface 616a and the first segment 611 are arranged adjacent to each other along the first direction A, preventing the first interface 616a from encroaching on the space in the first segment 611 used to accommodate and support the capacitor module 230, and reducing the difficulty of integrating the power supply device 100 and the motor controller 200 into the first receiving tank 610.

[0108] In one embodiment, capacitor module 230 is used to receive and adjust the DC power transmitted from the power battery, and the output terminal of capacitor module 230 is connected to the input terminal of power module 220. The functions of capacitor module 230 include, but are not limited to, smoothing voltage, reducing inductance parameters, weakening voltage spikes, absorbing high pulse currents, and preventing overcharging and transient voltage from affecting motor controller 200. In one embodiment, power module 220 is used to convert DC power to AC power and output three-phase AC power to the windings of the drive motor through the first AC transmission component of the motor controller and the second AC transmission component of the drive motor.

[0109] In one embodiment, the second interface 616b of the first receiving tank 610 is used to transfer coolant from the internal flow channels of the first receiving tank 610 to the radiator 210. (Combined) Figure 6 and Figure 7As shown, the arrangement direction of the first interface 616a and the second interface 616b intersects with the first direction A. In this embodiment, the placement direction of the power module 220 and the heat sink 210 in the first receiving slot 610 matches the arrangement direction of the first interface 616a and the second interface 616b. By adjusting the arrangement direction of the first interface 616a and the second interface 616b to intersect with the first direction A, the space occupied by the heat sink 210 and the power module 220 in the first direction A can be shortened, making it easier to arrange the motor controller 200 and the power supply device 100 along the first direction A.

[0110] Figure 8 This is a partial structural schematic diagram of the powertrain 10 provided in an embodiment of this application. Figure 9 This is a schematic diagram of the powertrain 10 provided in the embodiments of this application.

[0111] In one embodiment, combined with Figure 8 and Figure 9 As shown, the first AC transmission component 240 of the motor controller 200 is used to output three-phase AC power to the second AC transmission component 310 of the drive motor 300. For example... Figure 8 As shown, one end of the terminal block 700 of the powertrain 10 is used for fixed connection to the first AC transmission component 240 of the motor controller 200. (As indicated...) Figure 9 As shown, the first wall 617a of the first receiving groove 610 extends along the first direction A from the first segment 611 to the second segment 612, as... Figure 6 As shown, the first mounting holes 618a of the first receiving groove 610 are distributed on the first groove wall 617a. (Combined with...) Figure 6 and Figure 8 As shown, the first mounting hole 618a is opposite to the gap between the motor controller 200 and the power supply device 100 along the first direction A, and one end of the terminal block 700 is used to extend through the first mounting hole 618a into the gap between the motor controller 200 and the power supply device 100.

[0112] In this embodiment, the first segment 611 and the second segment 612 expand the accommodating space of the first receiving groove 610 along the first direction A, allowing the power supply device 100 and the motor controller 200 to be arranged at intervals along the first direction A, which helps to reduce mutual interference between the power supply device 100 and the motor controller 200. The first AC transmission component 240 of the motor controller 200 needs to be electrically connected to the second AC transmission component 310 of the drive motor 300 outside the first receiving groove 610 via the terminal block 700. To improve the space utilization of the first receiving groove 610, one end of the terminal block 700 can be accommodated using the gap between the power supply device 100 and the motor controller 200 along the first direction A. Based on the relative position of the power supply device 100 and the motor controller 200, the first mounting hole 618a for mounting the terminal block 700 is arranged in the first groove wall 617a of the first receiving groove 610. The first groove wall 617a is arranged along the axial direction O of the drive motor 300 with the power supply device 100 and the motor controller 200, so that the first mounting holes 618a distributed in the first groove wall 617a can be directly aligned with the gap between the power supply device 100 and the motor controller 200 along the axial direction O of the drive motor 300. One end of the terminal block 700 is distributed in the gap between the motor controller 200 and the power supply device 100, which can avoid interference between the first AC transmission component 240 and other functional modules, reduce the detour and crossing of the first AC transmission component 240 in the first receiving groove 610, and help reduce the assembly complexity of the powertrain 10.

[0113] In one embodiment, both the first AC transmission element 240 and the second AC transmission element 310 are three-phase copper busbars.

[0114] In one embodiment, combined with Figure 4 and Figure 6 As shown, the second mounting hole 618b of the first receiving groove 610 is used to mount the first connector 800a, and the third mounting hole 618c of the first receiving groove 610 is used to mount the second connector 800b. Each of the first connector 800a and the second connector 800b is used for electrical connection between the power supply device 100 and the motor controller 200. Figure 6 As shown, the second groove wall 617b of the first receiving groove 610 is arranged on both sides of the first section 611 and the second section 612 along the axial direction O of the drive motor 300, along with the first groove wall 617a. The second mounting hole 618b is distributed on the first groove wall 617a, and the third mounting hole 618c is distributed on the second groove wall 617b.

[0115] In this embodiment, integrating the power supply device 100 and the motor controller 200 within the first receiving slot 610 requires consideration of the connector layout for electrical connections to the power supply device 100 and the motor controller 200. The second mounting hole 618b and the third mounting hole 618c of the first receiving slot 610 are used to mount the first connector 800a and the second connector 800b, respectively. The arrangement direction of the second mounting hole 618b and the third mounting hole 618c is perpendicular to the arrangement direction of the power supply device 100 and the motor controller 200, facilitating the sharing of the first connector 800a and the second connector 800b between the power supply device 100 and the motor controller 200. The second mounting hole 618b and the third mounting hole 618c are distributed on different walls of the first receiving slot 610, reducing mutual interference between the first connector 800a and the second connector 800b.

[0116] In one embodiment, the first connector 800a can be used to transmit high-voltage DC power to the power supply device 100 and the motor controller 200, and the second connector 800b can be used to transmit control signals to the power supply device 100 and the motor controller 200. The first mounting hole 618a and the third mounting hole 618c are distributed on different walls of the first receiving groove 610, which helps to reduce electromagnetic interference to signal transmission and achieve high and low voltage decoupling.

[0117] In one embodiment, such as Figure 5 and Figure 7 As shown, the first receiving groove 610 includes a third groove wall 617c and a fourth groove wall 617d, each of the third groove wall 617c and the fourth groove wall 617d being used to connect the first groove wall 617a and the second groove wall 617b, the third groove wall 617c and the fourth groove wall 617d being opposite each other along a first direction A. Figure 5 As shown, the liquid outlet 613 is adjacent to the third tank wall 617c, as... Figure 7 As shown, the inlet 614 is adjacent to the fourth tank wall 617d. Based on the positions of the outlet 613 and the inlet 614, the embodiments of this application adjust the first mounting hole 618a, the second mounting hole 618b, and the third mounting hole 618c to avoid being positioned relative to the outlet 613 and the inlet 614, which is beneficial to improving the safety performance of the power supply device 100 and the motor controller 200.

[0118] In one embodiment, combined with Figure 6 and Figure 9 As shown, the second receiving groove 620 is used to receive the drive motor 300. One end of the second AC transmission component 310 of the drive motor 300 extends out of the second receiving groove 620 toward the first mounting hole 618a. The other end of the terminal block 700 is used to fix one end of the second AC transmission component 310 of the drive motor 300. Figure 6As shown, the distance between the first mounting hole 618a and the second receiving groove 620 along the second direction B is less than the distance between the second mounting hole 618b and the second receiving groove 620.

[0119] In this embodiment, the two ends of the terminal block 700 are respectively used to connect the first AC transmission component 240 of the motor controller 200 and the second AC transmission component 310 of the drive motor 300. Therefore, the position of the first mounting hole 618a needs to take into account the connection difficulty between the two ends of the terminal block 700 and the two AC transmission components. When the gap between the first mounting hole 618a and the power supply device 100 and the motor controller 200 is opposite, the wiring operation of the second AC transmission component 310 of the drive motor 300 can be simplified by adjusting the distance between the first mounting hole 618a and the second receiving groove 620.

[0120] In one embodiment, combined with Figure 6 and Figure 9 As shown, the second mounting hole 618b and the third mounting hole 618c are distributed on both sides of either the first segment 611 or the second segment 612 along the axial direction O of the drive motor 300.

[0121] In this embodiment, the first mounting hole 618a needs to be aligned with the gap between the motor controller 200 and the power supply device 100. The first segment 611 and the second segment 612 are located at the edge of the bottom of the first receiving groove 610. Arranging the second mounting hole 618b and the third mounting hole 618c on both sides of the first segment 611 or the second segment 612 along the axial direction O of the drive motor 300 can provide space for the layout of the first mounting hole 618a and reduce interference between the first connector 800a and the first AC transmission component.

[0122] In one embodiment, such as Figure 5 As shown, the first receiving slot 610 is used to receive the first circuit board 250 and the second circuit board 110. The first circuit board 250 is used to fix the electrical components of the motor controller 200, and the second circuit board 110 is used to fix the electrical components of the power supply device 100. Along the second direction B, the first circuit board 250 is distributed on the side of the electrical components of the motor controller 200 opposite to the first segment 611, and along the second direction B, the second circuit board 110 is distributed on the side of the electrical components of the power supply device 100 opposite to the second segment 612. Along the second direction B, the distance between the first circuit board 250 and the opening of the first receiving slot 610 is greater than or less than the distance between the second circuit board 110 and the opening of the first receiving slot 610.

[0123] In this embodiment, the motor controller 200 and the power supply device 100 are arranged at intervals along the first direction A. The electrical components of the motor controller 200 and the power supply device 100 are connected to the first circuit board 250 and the second circuit board 110, respectively. Compared to the power supply device 100 and the motor controller 200 sharing a single circuit board, this embodiment helps to reduce the space occupied by the first circuit board 250 and the second circuit board 110 within the first receiving groove 610. The heights of the motor controller 200 and the power supply device 100 along the second direction B are generally inconsistent, and the depths of the recesses of the first segment 611 and the second segment 612 toward the second receiving groove 620 are also unequal. By introducing the first circuit board 250 and the second circuit board 110, the distance between the first circuit board 250 and the second circuit board 110 and the slot opening of the first receiving groove 610 can be adjusted according to factors such as the height of the motor controller 200 and the power supply device 100, and the recess depth of the first segment 611 and the second segment 612. This is beneficial to improve the utilization rate of the internal space of the first receiving groove 610 and reduce the difficulty of integrating the motor controller 200 and the power supply device 100 into the first receiving groove 610.

[0124] The powertrain and electric vehicle provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and embodiments of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in specific embodiments and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A powertrain, characterized in that, The powertrain includes a power supply unit, a motor controller, a drive motor, and a planetary reducer. The power supply unit outputs direct current to power the electric vehicle's battery or load. The motor controller outputs alternating current to control the drive motor. The drive motor is connected to the input end of the planetary reducer, and the output end of the planetary reducer is connected to the wheels of the electric vehicle. The input and output ends of the planetary reducer are arranged along the axial direction of the drive motor. The powertrain housing includes a first receiving slot, a second receiving slot, and a third receiving slot. The first receiving slot is used to receive the power supply device and the motor controller. The second receiving slot is used to receive at least one of the drive motor and the planetary reducer. The third receiving slot is used to receive at least one of the oil pump and the fine filter of the powertrain. The bottom of the first receiving groove is stacked on the peripheral wall of the second receiving groove along the radial direction of the drive motor. The first segment and the second segment of the bottom of the first receiving groove protrude from both sides of the peripheral wall of the second receiving groove along a first direction, which is perpendicular to the axial direction of the drive motor and the stacking direction of the first receiving groove and the second receiving groove. The inner side of the first segment faces one of the power supply device and the motor controller, and the inner side of the second segment faces the other of the power supply device and the motor controller. The third receiving groove is distributed on the outer side of the first segment and the outer side of the peripheral wall of the second receiving groove.

2. The powertrain according to claim 1, characterized in that, The depth of the first segment recessed toward the second receiving groove along the stacking direction of the first receiving groove and the second receiving groove is a first dimension, and the depth of the second segment recessed toward the second receiving groove along the stacking direction of the first receiving groove and the second receiving groove is a second dimension, wherein the first dimension is smaller than the second dimension.

3. The powertrain according to claim 1 or 2, characterized in that, The first segment protrudes from the peripheral wall of the second receiving groove along the first direction, and the opening of the third receiving groove intersects with the first direction.

4. The powertrain according to any one of claims 1-3, characterized in that, The powertrain housing includes an oil pump housing and a fine filter housing. The oil pump housing houses the oil pump, and the fine filter housing houses the fine filter. The oil pump receiving tank and the fine filter receiving tank are distributed on the outer side of the first section and on the outer side of the peripheral wall of the second receiving tank, and the arrangement direction of the oil pump receiving tank and the fine filter receiving tank intersects with the first direction.

5. The powertrain according to any one of claims 1-4, characterized in that, Under the action of the oil pump, the oil in the second container flows sequentially through the oil pump, the fine filter, and the heat exchanger of the powertrain. The heat exchanger is used to receive the coolant output from the outlet of the first container to cool the oil flowing through the second container, wherein: The liquid outlet and the third receiving tank are located on the same side of the peripheral wall of the second receiving tank along the first direction.

6. The powertrain according to claim 5, characterized in that, The arrangement direction of the liquid outlet and the third receiving tank intersects with the first direction.

7. The powertrain according to claim 5 or 6, characterized in that, The inlet of the first receiving tank is used to input coolant into the internal flow channel of the first receiving tank. The internal flow channel of the first receiving tank is used to transfer coolant to sequentially cool the power supply device and the motor controller. The outlet is used to receive coolant from the internal flow channel of the first receiving tank, wherein: The inner side of the first segment faces the motor controller, the inner side of the second segment faces the power supply device, the liquid outlet is arranged adjacent to the first segment along the stacking direction of the first and second receiving tanks, and the liquid inlet is arranged adjacent to the second segment along the stacking direction of the first and second receiving tanks.

8. The powertrain according to claim 7, characterized in that, The length of the outlet protruding from the circumferential wall of the second receiving tank is less than the length of the first segment protruding from the circumferential wall of the second receiving tank, and the length of the inlet protruding from the circumferential wall of the second receiving tank is less than or equal to the length of the second segment protruding from the circumferential wall of the second receiving tank.

9. The powertrain according to claim 7 or 8, characterized in that, The protrusion of the first receiving groove protrudes from the second section toward the power supply device. The protrusion is used to integrate a first flow channel, which is used to receive coolant from the inlet to cool the power supply device, wherein: The protrusion and the liquid inlet are distributed on the same side of the second segment along the stacking direction of the first and second receiving tanks, and the extension direction of the protrusion intersects the first direction.

10. The powertrain according to any one of claims 7-9, characterized in that, The motor controller includes a heat sink, a power module, and a capacitor module. The heat sink receives coolant from the internal flow channels of the first receiving tank to cool the power module. The capacitor module is stacked between the heat sink and the first segment along the stacking direction of the first and second receiving tanks, wherein: The interface of the first receiving tank is used to transfer the coolant of the radiator to the outlet. The interface protrudes from the bottom of the first receiving tank toward the radiator. Along the first direction, the interface is arranged adjacent to the first segment. Along the stacking direction of the first receiving tank and the second receiving tank, one end of the interface and the radiator are distributed on one side of the first segment. Along the stacking direction of the first receiving tank and the second receiving tank, the other end of the interface and the outlet are distributed on the other side of the first segment.

11. The powertrain according to any one of claims 1-10, characterized in that, The first AC transmission component of the motor controller is used to output three-phase AC power to the second AC transmission component of the drive motor, and one end of the terminal block of the powertrain is used to fixally connect to the first AC transmission component, wherein: The first wall of the first receiving groove extends from the first segment to the second segment along the first direction. The first mounting holes of the first receiving groove are distributed on the first wall. The first mounting holes are opposite to the gap between the motor controller and the power supply device along the first direction. One end of the terminal block is used to extend through the first mounting hole into the gap between the motor controller and the power supply device.

12. The powertrain according to claim 11, characterized in that, The second mounting hole of the first receiving slot is used to install the first connector, and the third mounting hole of the first receiving slot is used to install the second connector. Each of the first connector and the second connector is used to electrically connect the power supply device and the motor controller, wherein: The second wall of the first receiving groove is arranged on both sides of the first segment and the second segment along the axial direction of the drive motor, the second mounting hole is distributed on the first groove wall, and the third mounting hole is distributed on the second groove wall.

13. The powertrain according to claim 12, characterized in that, The second receiving slot is used to accommodate the drive motor. One end of the second AC transmission component extends out of the second receiving slot toward the first mounting hole. The other end of the terminal block is used to fix one end of the second AC transmission component. Along the stacking direction of the first receiving slot and the second receiving slot, the distance between the first mounting hole and the second receiving slot is smaller than the distance between the second mounting hole and the second receiving slot.

14. The powertrain according to claim 12 or 13, characterized in that, The second mounting hole and the third mounting hole are distributed on both sides of either the first segment or the second segment along the axial direction of the drive motor.

15. An electric vehicle, characterized in that, The electric vehicle includes a power battery and a powertrain as described in any one of claims 1-14, the powertrain being used to receive power from the power battery and to drive the wheels of the electric vehicle.

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