Motor with motor winding inserted in circuit board, power assembly and electric vehicle

Abstract

The utility model provides a motor with a motor winding inserted into a circuit board, a power assembly and an electric vehicle. The motor comprises a stator and a rotor, the stator is arranged on the peripheral face of the rotor in a sleeving mode, and the stator comprises a stator iron core, a plurality of wires and a circuit board. The stator core includes a plurality of winding slots. Each wire comprises at least one linear section and two wire outlet sections, each linear section is accommodated in one winding groove, each wire outlet section is used for being connected with one linear section, and the two wire outlet sections are exposed out of the stator iron core in the axial direction of the stator iron core. One circuit board and the stator iron core are arranged along the axial direction of the stator iron core, and the wire outlet section which is arranged between one circuit board and the stator iron core along the axial direction of the stator iron core is inserted into one circuit board. According to the invention, one circuit board is used for realizing the connection among the plurality of outgoing line sections in a matching manner, thereby facilitating the reduction of long-distance same-layer bridging and cross-layer connection among the outgoing line sections, effectively reducing the height of the outgoing line sections in the axial direction of the stator iron core, and reducing the size of the motor in the axial direction.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor, a powertrain and an electric vehicle in which a motor winding is plugged into a circuit board. Background Art

[0002] In recent years, environmental pollution and energy shortages have accelerated the development and utilization of green renewable energy. Electric vehicles are becoming more and more popular with users due to their low pollution, low noise, and high energy efficiency. The market share of electric vehicles is also increasing year by year. In order to facilitate installation and layout, both the powertrain and the drive motor have been required to be miniaturized. Utility Model Content

[0003] The present application provides a motor, a powertrain and an electric vehicle in which a motor winding is plugged into a circuit board.

[0004] In a first aspect, a motor having a motor winding plugged into a circuit board, the motor comprising a stator and a rotor, the stator being sleeved on the outer circumference of the rotor, the stator comprising a stator core, a plurality of wires and a circuit board, the stator core comprising a plurality of winding slots. Each wire comprises at least one straight segment and two outgoing wire segments, each of the straight segments being accommodated in one of the winding slots. Each of the outgoing wire segments is used to connect one of the straight segments, and the two outgoing wire segments are exposed from the stator core along the axial direction of the stator core. The one circuit board and the stator core are arranged along the axial direction of the stator core, and the outgoing wire segment arranged between the one circuit board and the stator core along the axial direction of the stator core is plugged into the one circuit board.

[0005] In the embodiment of the present application, the outgoing line segments arranged between a circuit board and the stator core are electrically connected to a circuit board. A circuit board is used to cooperate in realizing the connection between multiple outgoing line segments, and the way to realize the conduction between multiple wires is more convenient, which is conducive to shortening the length of the outgoing line segments and reducing the long-distance same-layer bridging and cross-layer connection between the outgoing line segments, thereby effectively reducing the height of the outgoing line segments along the axial direction of the stator core. The height of the multiple outgoing line segments arranged between a circuit board and the stator core is relatively small, which reduces the overall size of the stator, thereby reducing the size of the motor along the axial direction.

[0006] In addition, the outgoing wire segment is directly connected to a circuit board, and multiple outgoing wire segments do not need to be twisted along the circumference of the stator core to achieve connection, which simplifies the structure of the outgoing wire segment. And the plug-in method is adopted, and the connection between the outgoing wire segment and a circuit board is convenient, which is helpful for the assembly of the stator and helps to reduce the overall size of a circuit board and multiple wires.

[0007] In one embodiment, along the radial direction of the stator core, the distance between the inner circumference of the one circuit board and the outer circumference of the one circuit board is greater than or equal to the depth of the winding slot. In the embodiment of the present application, the distance between the inner circumference and the outer circumference of a circuit board is greater than the depth of the winding slot, which increases the current carrying capacity of a circuit board, and a circuit board has a larger space along the radial direction of the stator core for plugging in a larger number of outgoing line segments. A larger number of outgoing line segments are connected through a circuit board, which is conducive to reducing the axial size of the stator.

[0008] In one embodiment, the inner diameter of the circuit board along the radial direction of the stator core is less than or equal to the inner diameter of the stator core. In the embodiment of the present application, the gap between the inner circumference of a circuit board and the outer circumference of the motor shaft is fully utilized to increase the board area of ​​a circuit board, thereby improving the flow capacity of a circuit board and facilitating the reduction of the axial size of the stator.

[0009] In one embodiment, the outer diameter of the one circuit board along the radial direction of the stator core is less than or equal to the outer diameter of the stator core. In the embodiment of the present application, the outer diameter of one circuit board is not greater than the outer diameter of one circuit board, and the radial dimension of one circuit board and the stator core as a whole is small, which is conducive to the miniaturization of the stator. In addition, the modification of the motor by setting a circuit board is reduced, and the adaptability of the stator is improved.

[0010] In one embodiment, the circuit board includes multiple rows of connection holes, each of which is used to accommodate one of the outgoing wire segments, and the multiple rows of connection holes are arranged at intervals along the circumference of the stator core, and each row of connection holes includes multiple connection holes arranged at intervals along the radial direction of the stator core. In the embodiment of the present application, the outgoing wire segment is accommodated in the connection hole, which is conducive to reducing the axial size of the stator. In addition, the regular arrangement of the connection holes is conducive to simplifying the preparation process of the circuit board.

[0011] In one embodiment, the two outgoing wire segments of each of the wires are arranged between the stator core and the one circuit board along the axial direction of the stator core. Each of the wires also includes at least one bending segment, each of which is used to connect two straight segments, and each of the bending segments is exposed from the stator core along the axial direction of the stator core. In the embodiment of the present application, all the outgoing wire segments are plugged into a circuit board, and multiple wires are connected through a circuit board, which is convenient for the assembly and preparation of the stator, and only one circuit board is provided to reduce costs.

[0012] In one embodiment, along the axial direction of the stator core, the distance between the one circuit board and the stator core is less than the height of the bent section exposed at one end of the stator core away from the one circuit board. In the embodiment of the present application, since the outgoing line segment is plugged into a circuit board, the long-distance same-layer bridging and cross-layer connection between the outgoing line segments are reduced, and the distance between the one circuit board and the stator core is reduced, so that the height of the outgoing line segment at one end of the stator toward the one circuit board is less than the height of the bent section at the other end, which is conducive to the miniaturization of the stator.

[0013] In one embodiment, the circuit board includes a plurality of sub-boards, and the plurality of sub-boards are stacked and arranged along the axial direction of the stator core. In the embodiment of the present application, the plurality of sub-boards increases the board area of ​​the circuit board. This allows a circuit board to have a larger space for plugging out wire segments. A circuit board has a greater current carrying capacity, so that a circuit board can adapt to a stator with a larger number of wires, improves the adaptability of a circuit board, and can optimize the internal routing of a circuit board.

[0014] In one embodiment, among any two of the sub-plates, the distance between one of the sub-plates and the stator core along the axial direction of the stator core is smaller than the distance between the other sub-plate and the stator core, and the outer diameter of the one sub-plate is smaller than the outer diameter of the other sub-plate. In the embodiment of the present application, along the axial direction of the stator core, the outer diameter of the sub-plate that is smaller from the stator core is smaller, so that the outgoing line segment can be smoothly plugged into the sub-plate that is farther from the stator core. And the sub-plate that is closer to the stator core can form an avoidance space for the sub-plate that is farther from the stator core, shortening the connection distance between the outgoing line segment and the sub-plate that is farther from the stator core, which is conducive to reducing the overall size of the stator.

[0015] In one embodiment, one of the straight line segments is connected to the one sub-plate via one of the outgoing line segments, and another of the straight line segments is connected to the other sub-plate via another of the outgoing line segments, and the distance between the one straight line segment and the inner circumference of the stator core along the radial direction of the stator core is less than or equal to the distance between the other straight line segment and the inner circumference of the stator core.

[0016] In the embodiment of the present application, since the outer diameter of one sub-plate is smaller than the outer diameter of another sub-plate, a straight line segment is arranged close to the inner circumference of the stator core, shortening the distance between one outgoing line segment and one sub-plate, which helps to shorten the length of one outgoing line segment, thereby reducing the axial height of one outgoing line segment. Another straight line segment is arranged close to the outer circumference of the stator core, shortening the distance between another outgoing line segment and another sub-plate, which helps to shorten the length of another outgoing line segment, thereby reducing the axial height of another outgoing line segment.

[0017] In one embodiment, the motor further comprises another circuit board, wherein the another circuit board, the stator core and the one circuit board are arranged axially along the stator core, and the outgoing line segment arranged axially along the stator core between the another circuit board and the stator core is plugged into the another circuit board.

[0018] In the embodiment of the present application, two circuit boards are used together to achieve conduction between multiple wires, and the way to achieve conduction between multiple wires is more convenient. The outgoing wire segments exposed at both ends of the stator core are respectively plugged into the two circuit boards, which is conducive to reducing the long-distance same-layer cross-connection and cross-layer connection between the outgoing wire segments exposed at one end of the stator core, and is conducive to reducing the long-distance same-layer cross-connection and cross-layer connection between the outgoing wire segments exposed at the other end of the stator core. Thereby effectively reducing the axial height of the outgoing wire segment exposed at one end of the stator core, and reducing the axial height of the outgoing wire segment exposed at the other end of the stator core, reducing the overall size of the stator.

[0019] In one embodiment, the plurality of wires include at least one wire. The two lead segments of each of the at least one wire are respectively plugged into the one circuit board and the other circuit board. In the embodiment of the present application, the two circuit boards are connected through at least one wire, and a three-phase lead wire is provided on one of the circuit boards to receive the alternating current transmitted by the motor controller, which can be transmitted to the other circuit board through at least one wire, thereby reducing the number of three-phase lead wires and simplifying the connection line between the circuit board and the motor controller. In addition, the two circuit boards are electrically connected through at least one wire, and there is no need to additionally set up a cable connecting the two circuit boards, which is conducive to the miniaturization of the stator.

[0020] In one embodiment, each of the outlet segments includes a radial segment and an axial segment, the radial segment is used to connect the axial segment and one of the straight segments, and the axial segment arranged between the one circuit board and the stator core along the axial direction of the stator core is used to be plugged into the one circuit board. In the embodiment of the present application, the radial segment and the axial segment are arranged at an angle, and the radial segment can be used to adjust the position of the axial segment so that the axial segment can be smoothly plugged into the connection hole of the circuit board.

[0021] In one embodiment, the length of the radial segment is greater than or equal to the length of the axial segment. In the embodiment of the present application, the longer length of the radial segment can better adjust the plug-in position of the axial segment and the circuit board. The shorter length of the axial segment can allow the axial segment to be accommodated in the connection hole of the circuit board to reduce the axial size of the stator.

[0022] In one embodiment, the length of the axial section is greater than or equal to the height of the circuit board along the axial direction of the stator core. This is conducive to achieving electrical connection between the axial section and the circuit board, and is convenient for fixing the axial section to the circuit board. Exemplarily, after the axial section is plugged into the connection hole of the circuit board, the insertion depth of the axial section is deep, which is conducive to welding the axial section to the circuit board from the side of the circuit board away from the stator core.

[0023] In one embodiment, each of the winding slots is used to accommodate a plurality of the straight line segments stacked in sequence along the radial direction of the stator core. In the two outgoing line segments respectively connected to two adjacent straight line segments in one of the winding slots, the angle between the radial segment and the axial segment of one of the outgoing line segments is different from the angle between the radial segment and the axial segment of the other outgoing line segment. In the embodiment of the present application, the angles between the radial segment and the axial segment of two adjacent outgoing line segments are different, so that the axial segments of the two outgoing line segments can be respectively plugged into two radially adjacent and spaced connection holes.

[0024] In one embodiment, along the radial direction of the stator core, the spacing between the axial segment of one outgoing line segment and the axial segment of the other outgoing line segment is greater than the spacing between the two straight line segments. In the embodiment of the present application, by adjusting the bending angle of the radial segment, the spacing between the axial segments of the two outgoing line segments is larger, which increases the operating space for the two axial segments to be plugged into the circuit board, making the plug-in operation easier to perform. In addition, in order to facilitate wiring and opening holes, the circuit board needs to have a certain gap between two radially adjacent connection holes. The larger spacing between the two axial segments can better adapt to plugging into two spaced connection holes.

[0025] In one embodiment, of the two outgoing wire segments respectively connected to the two straight line segments in one winding slot, the radial segment of one outgoing wire segment along the radial direction of the stator core is bent from the one straight line segment connected thereto away from the axis of the stator core, and the radial segment of the other outgoing wire segment along the radial direction of the stator core is bent from the other straight line segment connected thereto toward the axis of the stator core. The distance between the one straight line segment and the axis of the stator core is greater than the distance between the other straight line segment and the axis of the stator core.

[0026] In the embodiment of the present application, a radial segment connected to a straight segment close to the outer circumferential surface of the stator core is bent toward the outer circumferential surface of the stator core, and a radial segment connected to another straight segment close to the inner circumferential surface of the stator core is bent toward the inner circumferential surface of the stator core, thereby reducing the intersection between the radial segments and shortening the length of the radial segments, which is beneficial to reducing the axial distance between the corresponding circuit board and the stator core, thereby facilitating the miniaturization of the stator.

[0027] In one embodiment, the plurality of straight line segments in each winding slot correspond to a plurality of layers. In the two outgoing line segments respectively connected to the two straight line segments of the same layer sequence in the two winding slots, the angle between the radial segment and the axial segment of one outgoing line segment is the same as the angle between the radial segment and the axial segment of the other outgoing line segment. In the embodiment of the present application, in the two outgoing line segments, the angle between the radial segment and the axial segment of one outgoing line segment is consistent with the angle between the radial segment and the axial segment of the other outgoing line segment, the outgoing line segments connected to the straight line segments of the same layer sequence have similar structures, and the outgoing line segments are arranged regularly, which simplifies the wire winding process of multiple wires and is conducive to reducing the size of the stator.

[0028] In one embodiment, the length of the radial segment of the one outgoing line segment is equal to the length of the radial segment of the other outgoing line segment. In the embodiment of the present application, the outgoing line segments connected to the same layer sequence straight line segments have similar structures, which is conducive to reducing the overall size of the multiple radial segments along the axial direction, thereby reducing the size of the stator.

[0029] In one embodiment, along the axial direction of the stator core, the projection of the radial segment of the one outgoing line segment is spaced from the projection of the radial segment of the other outgoing line segment. In the embodiment of the present application, the projection of the radial segment of one outgoing line segment along the axial direction does not overlap with the projection of the radial segment of the other outgoing line segment along the axial direction, thereby reducing the increase in axial height caused by the axial overlap of the two radial segments. In the present application, the circumferential interference between the outgoing line segments is small, which is conducive to reducing the axial size of the outgoing line segments, thereby reducing the size of the stator.

[0030] In a second aspect, the present application provides a powertrain, which includes a reducer and the motor as described above, wherein the motor includes the motor shaft, the motor rotor is sleeved and fixed on the motor shaft, and the reducer input shaft of the reducer is used for transmission connection with the motor shaft.

[0031] In a third aspect, an electric vehicle comprises wheels, a battery pack and the motor as described above or comprises the powertrain as described above, wherein the motor or the powertrain is used to receive power from the battery pack and drive the wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 A schematic diagram of an electric vehicle provided in accordance with an embodiment of the present application.

[0034] Figure 2 A schematic diagram of a powertrain provided in accordance with an embodiment of the present application.

[0035] Figure 3 A schematic diagram of a motor provided in accordance with an embodiment of the present application.

[0036] Figure 4 A schematic diagram of a stator provided in accordance with an embodiment of the present application.

[0037] Figure 5 A schematic diagram of a circuit board provided in accordance with an embodiment of the present application.

[0038] Figure 6 A schematic diagram of a stator provided in accordance with an embodiment of the present application.

[0039] Figure 7 A schematic diagram of a motor is provided for one embodiment of the present application.

[0040] Figure 8 A three-dimensional diagram of a stator is provided for one embodiment of the present application.

[0041] Fig. 9 A schematic diagram of a stator provided in accordance with an embodiment of the present application.

[0042] Fig.10 A schematic diagram of a stator provided in accordance with an embodiment of the present application.

[0043] Fig.11 A schematic diagram of a stator provided in accordance with an embodiment of the present application.

[0044] Fig.12 A schematic diagram of a stator provided in accordance with an embodiment of the present application.

[0045] Fig.13 A schematic diagram of a stator provided in accordance with an embodiment of the present application.

[0046] Fig.14 A three-dimensional diagram of a stator is provided for one embodiment of the present application.

[0047] Fig.15 A cross-sectional view of a stator is provided for one embodiment of the present application.

[0048] Fig.16 A schematic diagram of a stator provided in accordance with an embodiment of the present application.

[0049] Fig.17 A schematic diagram of the connection of two branches of a U-phase winding provided in one embodiment of the present application. DETAILED DESCRIPTION

[0050] 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.

[0051] In this document, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0052] In addition, in this article, directional terms such as "upper" and "lower" are defined relative to the orientation of the structure schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the change of the orientation of the structure.

[0053] For ease of understanding, the relevant technical terms involved in the embodiments of the present application are explained and described below.

[0054] Parallelism: The parallelism defined in the embodiments of the present application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for situations where the absolute parallelism is not achieved due to factors such as assembly tolerance, design tolerance, and the influence of structural flatness.

[0055] Vertical: The verticality defined in the embodiments of the present application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for a relationship that is not absolutely vertical due to factors such as assembly tolerance, design tolerance, and influence of structural flatness. It also allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0056] See also Figure 1 , Figure 1 Schematic diagram of an electric vehicle provided in one embodiment of the present application. The electric vehicle includes a battery pack 3, wheels 2 and a powertrain 1. The powertrain 1 and the battery pack 3 are installed on the frame of the electric vehicle, and the powertrain 1 is used to receive power from the battery pack 3 and drive the wheels 2 to rotate.

[0057] Among them, electric vehicles include two-wheeled, three-wheeled or four-wheeled vehicles. The electric vehicle can be one of a pure electric vehicle (Pure Electric Vehicle / Battery Electric Vehicle, PEV / BEV), a hybrid electric vehicle (Hybrid Electric Vehicle, HEV), a range extended electric vehicle (Range Extended Electric Vehicle, REEV), a plug-in hybrid electric vehicle (Plug-in Hybrid Electric Vehicle, PHEV), and a new energy vehicle (New Energy Vehicle). In one embodiment, the electric vehicle is a means of transportation. Exemplarily, the electric vehicle is one of a commercial vehicle, a passenger car, a motorcycle, a flying car, and a train. In one embodiment, the electric vehicle is an industrial vehicle or an engineering vehicle. Exemplarily, the electric vehicle is one of a forklift, a trailer, a tractor, an excavator, a bulldozer, and a crane. In one embodiment, the vehicle can be an electric car or a fuel car. In one embodiment, the electric vehicle can also be agricultural equipment (such as a lawn mower, a harvester, etc.), amusement equipment, a toy vehicle, etc.

[0058] In one embodiment, an electric vehicle may include one or more powertrains 1 .

[0059] See also Figure 2 , Figure 2 A schematic diagram of a powertrain 1 provided for an embodiment of the present application. The powertrain 1 includes a reducer 5 and a motor 4. The motor 4 includes a motor shaft 30, which is used for driving connection with the input shaft of the reducer 5. The rotation of the motor shaft 30 can drive the input shaft of the reducer 5 to rotate, so that the power output by the motor 4 is transmitted to the input shaft of the reducer 5. Among them, the axial direction of the input shaft of the reducer 5 is parallel to the axial direction of the motor shaft 30 of the motor 4. The gear set of the reducer 5 can change the transmission ratio between the motor 4 and the wheel 2.

[0060] In one embodiment, the reducer 5 further includes a differential 6 (such as Figure 2 ). The differential 6 is connected to the gear set of the reducer 5 by driving. The half shaft 7 of the differential 6 is fixedly connected to the wheel 2. The reducer 5 receives the power transmitted by the motor shaft 30 through the gear set of the reducer 5 and transmits the power to the half shaft 7 through the differential 6 to drive the wheel 2 to rotate. The differential 6 realizes the differential rotation of the two half shafts 7 of the differential 6 through the planetary gear set of the differential 6.

[0061] In one embodiment, the powertrain 1 may include one motor 4 or one reducer 5. In one embodiment, the powertrain 1 may include multiple motors 4 or multiple reducers 5. For example, the powertrain 1 may be a dual-drive assembly.

[0062] Combined with reference Figure 3 In one embodiment, the motor 4 includes a motor shaft 30, a rotor 20 and a stator 10. The rotor 20 is sleeved and fixed on the outer surface of the motor shaft 30. The magnetic steel of the rotor 20 is used to generate the magnetic field of the rotor 20. The stator 10 includes a stator core 100 and a motor winding (combined with reference to Figure 4 The stator core 100 and the rotor 20 are arranged at intervals along the axial direction of the motor 4. The motor winding includes a plurality of wires 200, which are installed and fixed to the stator core 100.

[0063] In one embodiment, the powertrain 1 further includes a motor controller (not shown in the figure). The motor controller connects the battery pack 3 and the plurality of wires 200. The motor controller is used to receive the direct current output by the battery pack 3 and convert the direct current output by the battery pack 3 into alternating current and transmit it to the plurality of wires 200. The rotating magnetic field generated by the plurality of wires 200 after receiving the alternating current interacts with the magnetic field generated by the magnetic steel of the rotor 20. The action of the electromagnetic field causes the rotor 20 to rotate, thereby driving the motor shaft 30 to rotate.

[0064] The structural dimensions of the powertrain 1 affect the installation of the powertrain 1 in the electric vehicle. In the embodiment of the present application, the height of the plurality of wires 200 along the axial direction of the motor 4 is relatively small, which reduces the axial dimension of the motor 4 and is conducive to the miniaturization of the volume of the powertrain 1. The compact integrated design of the powertrain 1 facilitates the arrangement and installation of the powertrain 1 in the vehicle, and the powertrain 1 can save space in the electric vehicle, making it convenient for the electric vehicle to arrange and install other functional components, so as to improve the overall performance of the electric vehicle.

[0065] The motor 4 in this application is described in detail below.

[0066] See also Figure 3 and Figure 4 , Figure 3 A schematic diagram of a motor 4 provided in accordance with an embodiment of the present application. Figure 4 A schematic diagram of a stator 10 provided in an embodiment of the present application. The present application provides a motor 4 in which a motor winding is plugged into a circuit board 300. The stator 10 of the motor 4 includes a stator core 100, a plurality of wires 200 and a circuit board 300. The stator core 100 includes a plurality of winding slots 110. Each wire 200 includes at least one straight segment 210 and two outgoing wire segments 220. Each straight segment 210 is accommodated in a winding slot 110. Each outgoing wire segment 220 is used to connect a straight segment 210, and two outgoing wire segments 220 are exposed from the stator core 100 along the axial direction of the stator core 100. A circuit board 300 and the stator core 100 are arranged along the axial direction of the stator core 100, and the outgoing wire segment 220 arranged between a circuit board 300 and the stator core 100 along the axial direction of the stator core 100 is plugged into a circuit board 300.

[0067] The axial direction of the stator core 100 is parallel to the axial direction of the motor shaft 30 and perpendicular to the circumference of the stator core 100. A plurality of winding slots 110 are sequentially arranged at intervals along the circumference of the stator core 100. Each winding slot 110 penetrates the stator core 100 along the axial direction of the stator core 100.

[0068] In each wire 200, the two outgoing wire segments 220 are the first and last segments of a wire 200. The two outgoing wire segments 220 are exposed outside the winding slots 110. In one embodiment, the two outgoing wire segments 220 are exposed at one end of the stator core 100 along the axial direction of the stator core 100. In one embodiment, the two outgoing wire segments 220 are exposed at both ends of the stator core 100 along the axial direction of the stator core 100.

[0069] Each conductor 200 includes one or more straight segments 210. For example, in one embodiment, a conductor 200 includes a straight segment 210, and two outgoing segments 220 of the conductor 200 are connected to two ends of the straight segment 210 along the axial direction of the stator core 100. In one embodiment, a conductor 200 includes two or more straight segments 210, and the two outgoing segments 220 of the conductor 200 are respectively used to connect two different straight segments 210.

[0070] See also Figure 4 In one embodiment, each wire 200 includes the same number of straight segments 210. Exemplarily, each wire 200 includes two straight segments 210. In the embodiment of the present application, the structure of each wire 200 in the stator 10 is similar, which helps to simplify the assembly and winding process of multiple wires 200 in the stator 10.

[0071] In one embodiment, the plurality of wires 200 include two wires 200, and the two wires 200 include different numbers of straight segments 210. For example, one wire 200 includes one straight segment 210, and the other wire 200 includes two straight segments 210. In the embodiment of the present application, the stator 10 includes a plurality of diversified wires 200, and the positions of the plurality of outgoing segments 220 can be adjusted according to specific circumstances to optimize the routing in the circuit board 300.

[0072] In one embodiment, each wire 200 is an integrated structure. The integrated structure has high strength, which increases the service life of the wire 200 and helps ensure the normal operation of the wire 200.

[0073] Along the axial direction of the stator core 100, at least part of the outgoing wire segments 220 are arranged between a circuit board 300 and the stator core 100. Each of the outgoing wire segments 220 arranged between a circuit board 300 and the stator core 100 is plugged into a circuit board 300, so that the outgoing wire segments 220 arranged between a circuit board 300 and the stator core 100 are electrically connected to a circuit board 300. In one embodiment, the outgoing wire segments 220 plugged into a circuit board 300 can be fixed to a circuit board 300 by welding, clamping, clamping, etc.

[0074] A circuit board 300 is used to connect the motor controller, receive the alternating current output by the motor controller, and transmit the alternating current to the plurality of wires 200 .

[0075] The wiring in a circuit board 300 is used to cooperate to realize the electrical connection between the multiple wires 200 of the stator 10. Exemplarily, the stator 10 includes a three-phase winding, each phase winding includes one or more branches, and each branch of each phase winding includes one or more wires 200. The electrical connection between the multiple wires 200 of each branch, the electrical connection between the multiple branches of each phase winding, and the electrical connection between the three-phase windings are all realized through a circuit board 300.

[0076] In the embodiment of the present application, the outgoing wire segments 220 arranged between a circuit board 300 and the stator core 100 are electrically connected to a circuit board 300. On the one hand, a circuit board 300 is used to cooperate in realizing the connection between multiple outgoing wire segments 220, and the way to realize the conduction between multiple wires 200 is more convenient, which is conducive to shortening the length of the outgoing wire segments 220 and reducing the long-distance same-layer bridging and cross-layer connection between the outgoing wire segments 220, thereby effectively reducing the height of the outgoing wire segments 220 along the axial direction of the stator core 100. The height of the multiple outgoing wire segments 220 arranged between a circuit board 300 and the stator core 100 is small, which reduces the overall size of the stator 10, thereby reducing the size of the motor 4 along the axial direction.

[0077] On the other hand, the outgoing line segments 220 are directly connected to a circuit board 300 , and the multiple outgoing line segments 220 do not need to be twisted along the circumferential direction of the stator core 100 to achieve connection, which simplifies the structure of the outgoing line segments 220 .

[0078] On the other hand, the outgoing wire section 220 is plugged into a circuit board 300, and the connection between the outgoing wire section 220 and the circuit board 300 is convenient, which is helpful for assembling the stator 10. In addition, the plug-in method is helpful to reduce the overall size of a circuit board 300 and multiple wires 200, thereby facilitating the miniaturization of the stator 10.

[0079] In one embodiment, one circuit board 300 further includes three-phase lead wires, which are used to receive the alternating current transmitted by the motor controller and transmit the alternating current to the wires 200 plugged into one circuit board 300 .

[0080] In one embodiment, a circuit board 300 further includes a temperature sensor, and the temperature sensor is used to monitor the temperature of the plurality of wires 200. Exemplarily, the temperature sensor may be an NTC thermistor. In the embodiment of the present application, the temperature sensor is integrated into a circuit board 300, and the temperature sensor can be connected to the motor controller through a circuit board 300. The lines of the stator 10 are relatively concentrated, which is conducive to reducing the overall size of the stator 10. And because the outgoing line segment 220 is plugged into a circuit board 300, the temperature sensor can directly monitor the temperature of the outgoing line segment 220, and the measured temperature is relatively accurate.

[0081] See also Figure 5 . Figure 5 Schematic diagram of a circuit board 300 provided in an embodiment of the present application. In one embodiment, along the radial direction of the stator core 100, the distance between the inner circumference of a circuit board 300 and the outer circumference of a circuit board 300 is greater than or equal to the depth of the winding slot 110 (combined with reference to Figure 3 and Figure 4 ). Among them, a circuit board 300 includes an axial hole 301. The axial hole 301 is used to accommodate the motor shaft 30 of the motor 4, and the axial hole 301 passes through a circuit board 300 along the axial direction of the stator core 100. A circuit board 300 is annular. The inner circumference of a circuit board 300 is the hole wall of the axial hole 301. The distance between the inner circumference and the outer circumference of a circuit board 300 is the difference between the outer diameter and the inner diameter of a circuit board 300.

[0082] Each winding slot 110 is used to accommodate a plurality of straight segments 210. One or more straight segments 210 in a winding slot 110 are used to connect the outgoing line segment 220. The depth of the winding slot 110 is the distance between the slot opening and the slot bottom of the winding slot 110 along the radial direction of the stator core 100.

[0083] In the embodiment of the present application, the distance between the inner circumference and the outer circumference of a circuit board 300 is greater than the depth of the winding slot 110, thereby increasing the current carrying capacity of a circuit board 300, and a circuit board 300 has a large space along the radial direction of the stator core 100 for plugging in a larger number of outgoing line segments 220. A larger number of outgoing line segments 220 are connected to each other through a circuit board 300, which is conducive to reducing the axial size of the stator 10.

[0084] In one embodiment, the distance between the inner circumference of a circuit board 300 and the outer circumference of a circuit board 300 is greater than or equal to the distance between the inner circumference of the stator core 100 and the outer circumference of the stator core 100. In the embodiment of the present application, the size of a circuit board 300 along the radial direction of the stator core 100 is relatively large, and a circuit board 300 has a large flow capacity and can be used to plug in a larger number of outgoing line segments 220. A larger number of outgoing line segments 220 are connected to each other through a circuit board 300, which is conducive to reducing the axial size of the stator 10.

[0085] In one embodiment, the inner diameter of a circuit board 300 along the radial direction of the stator core 100 is less than or equal to the inner diameter of the stator core 100. Since a circuit board 300 and the stator core 100 are arranged axially, and the inner circumference of the stator core 100 is spaced from the outer circumference of the motor shaft 30, in the embodiment of the present application, the distance between the inner circumference of the circuit board 300 and the outer circumference of the motor shaft 30 along the radial direction of the stator core 100 is less than or equal to the distance between the inner circumference of the stator core 100 and the outer circumference of the motor shaft 30, and the gap between the inner circumference of the circuit board 300 and the outer circumference of the motor shaft 30 is fully utilized to increase the board area of ​​the circuit board 300, thereby improving the flow capacity of the circuit board 300 and helping to reduce the axial size of the stator 10.

[0086] In one embodiment, the inner diameter of a circuit board 300 is larger than the outer diameter of the motor shaft 30. The inner diameter of a circuit board 300 is the aperture of the shaft hole 301. In the embodiment of the present application, the inner diameter of a circuit board 300 is larger, so that the shaft hole 301 can be used to avoid the motor shaft 30.

[0087] In one embodiment, the outer diameter of a circuit board 300 along the radial direction of the stator core 100 is less than or equal to the outer diameter of the stator core 100. Since a circuit board 300 and the stator core 100 are arranged along the axial direction, in the embodiment of the present application, the outer diameter of a circuit board 300 is not greater than the outer diameter of a circuit board 300, and the radial dimension of a circuit board 300 and the stator core 100 as a whole is small, which is conducive to the miniaturization of the stator 10. In addition, the modification of the motor 4 by setting a circuit board 300 is reduced, and the adaptability of the stator 10 is improved.

[0088] Combined with reference Figure 4 and Figure 5 In one embodiment, a circuit board 300 includes multiple rows of connection holes 310, each of which is used to accommodate an outgoing line segment 220. Multiple rows of connection holes 310 are arranged at intervals along the circumference of the stator core 100, and each row of connection holes 310 includes multiple connection holes 310 arranged at intervals along the radial direction of the stator core 100.

[0089] Among them, at least a portion of each outgoing wire segment 220 is received in a connection hole 310. In the embodiment of the present application, the projection of the outgoing wire segment 220 along the radial direction of the stator core 100 overlaps at least partially with the projection of the circuit board 300, thereby reducing the axial dimension of the stator 10. In addition, the regular arrangement of the connection holes 310 is conducive to simplifying the preparation process of the circuit board 300.

[0090] In one embodiment, each outgoing line segment 220 is completely accommodated in a connection hole 310. A circuit board 300 and the stator core 100 are stacked in the axial direction. In the embodiment of the present application, the axial distance between a circuit board 300 and the stator core 100 is small, which is conducive to the small size of the stator 10.

[0091] In one embodiment, a portion of each outgoing wire segment 220 is accommodated in a connection hole 310, and another portion of each outgoing wire segment 220 is arranged in a gap between a circuit board 300 and the stator core 100. In the embodiment of the present application, a circuit board 300 and the stator core 100 are arranged at intervals along the axial direction, and the gap between a circuit board 300 and the stator core 100 can be used to adjust the structure and position of the outgoing wire segment 220, so that the outgoing wire segment 220 can be smoothly and conveniently plugged into the connection hole 310.

[0092] In one embodiment, the number of columns of the connection holes 310 is equal to the number of the winding slots 110. The multiple columns of connection holes 310 are respectively arranged with the multiple winding slots 110 along the axial direction of the stator core 100. In the embodiment of the present application, a column of connection holes 310 is aligned with a winding slot 110 along the axial direction, and the distance between the connection holes 310 and the winding slot 110 is small, which reduces the connection distance between the outgoing wire segment 220 and a circuit board 300, thereby facilitating the reduction of the axial dimension of the outgoing wire segment 220 and facilitating the miniaturization of the stator 10.

[0093] In one embodiment, the connection hole 310 penetrates a circuit board 300 along the axial direction of the stator core 100. After the outgoing wire segment 220 is inserted into the connection hole 310 from the side of the circuit board 300 toward the stator core 100 along the axial direction, the outgoing wire segment 220 can be welded to the circuit board 300 from the side of the circuit board 300 away from the stator core 100. This is conducive to fixing the outgoing wire segment 220 to the circuit board 300.

[0094] In one embodiment, each column of connection holes 310 includes the same number of connection holes 310. Exemplarily, the number of connection holes 310 in each column is the same as the number of straight segments 210 accommodated in each winding slot 110. The number of connection holes 310 in each column of connection holes 310 is kept consistent, which simplifies the process of opening multiple columns of connection holes 310 in one circuit board 300. In addition, since the number of all straight segments 210 accommodated in multiple winding slots 110 is greater than or equal to the number of outgoing line segments 220 arranged between the stator core 100 and one circuit board 300, the number of connection holes 310 in each column of one circuit board 300 is the same as the number of straight segments 210 accommodated in each winding slot 110, and various assembly forms of various types of wires 200 can be adapted, thereby improving the adaptability of one circuit board 300.

[0095] In one embodiment, the plurality of columns of connection holes 310 include two columns of connection holes 310, and the number of connection holes 310 in the two columns of connection holes 310 is different. In the embodiment of the present application, each column of connection holes 310 is arranged according to the number and position distribution of the outgoing line segments 220, and each connection hole 310 accommodates one outgoing line segment 220, thereby improving the utilization rate of the connection holes 310 and reducing the number of openings of a circuit board 300.

[0096] See also Figure 4 In one embodiment, the two outgoing wire segments 220 of each wire 200 are arranged between the stator core 100 and a circuit board 300 along the axial direction of the stator core 100. Each wire 200 includes an even number of straight segments 210. The two outgoing wire segments 220 of each wire 200 are exposed at one end of the stator core 100 facing a circuit board 300. The two outgoing wire segments 220 of each wire 200 are respectively connected to two different straight segments 210.

[0097] In the embodiment of the present application, all the outgoing line segments 220 are plugged into a circuit board 300, and multiple wires 200 are connected through a circuit board 300, which facilitates the assembly and preparation of the stator 10, and only one circuit board 300 is provided to reduce costs.

[0098] See also Figure 4 In one embodiment, each conductor 200 further includes at least one bent segment 230, and each bent segment 230 is used to connect two straight segments 210. Each bent segment 230 is exposed from the stator core 100 along the axial direction of the stator core. In each conductor 200, the straight segments 210 and the bent segments 230 are alternately connected.

[0099] Exemplarily, each wire 200 includes a bent segment 230 and two straight segments 210 (eg, Figure 4As shown in FIG. 1 , an outgoing line segment 220, a straight line segment 210, a bent segment 230, another straight line segment 210 and another outgoing line segment 220 are connected in sequence.

[0100] In the embodiment of the present application, since the two outgoing wire segments 220 of each wire 200 are exposed at one end of the stator core 100 facing one circuit board 300, each wire 200 includes at least one bent segment 230 exposed at one end of the stator core 100 away from one circuit board 300. The setting of the bent segment 230 can, on the one hand, be used to realize that the two outgoing wire segments 220 of each wire 200 are exposed at the same end of the stator core 100. On the other hand, the bent segment 230 can be used to increase the length of the wire 200 to reduce the number of the wires 200, thereby reducing the number of the outgoing wire segments 220. The number of the outgoing wire segments 220 is small, which reduces the solder joints between the outgoing wire segments 220 and the circuit board 300, and facilitates the connection between the outgoing wire segments 220 and the circuit board 300.

[0101] In one embodiment, each bending segment 230 connects two straight segments 210 and is respectively accommodated in different winding slots 110. The distance between each bending segment 230 and two straight segments 210 is large, which reduces the bending angle of the bending segment 230, reduces the risk of bending and breaking of the bending segment 230, and can reduce the axial height of the bending segment 230.

[0102] In one embodiment, along the axial direction of the stator core 100, the distance between a circuit board 300 and the stator core 100 is less than the height of the bent section 230 exposed at one end of the stator core 100 away from the circuit board 300. Since the two outgoing wire sections 220 of each wire 200 are exposed at one end of the stator core 100 facing the circuit board 300, the number of bent sections 230 exposed at one end of the stator core 100 facing the circuit board 300 is less than the number of bent sections 230 exposed at one end of the stator core 100 facing the circuit board 300. In the embodiment of the present application, since the outgoing wire sections 220 are plugged into the circuit board 300, the long-distance same-layer cross-connection and cross-layer connection between the outgoing wire sections 220 are reduced, and the distance between the circuit board 300 and the stator core 100 is reduced, so that the height of the outgoing wire section 220 at one end of the stator 10 facing the circuit board 300 is less than the height of the bent section 230 at the other end, which is conducive to the small size of the stator 10.

[0103] In one embodiment, each conductor 200 includes a bending section 230 and two straight sections 210, and the bending sections 230 of the plurality of conductors 200 are arranged at one end of the stator core 100 away from a circuit board 300. No bending section 230 is arranged between a circuit board 300 and the stator core 100. Each straight section 210 is connected to an outlet segment 220. Since the bending section 230 needs to cross slots and cross layers to connect the straight section 210, the height of the bending section 230 along the axial direction of the stator core 100 is relatively large. In the embodiment of the present application, since the outlet segment 220 is plugged into a circuit board 300, the long-distance same-layer cross-connection and cross-layer connection between the outlet segments 220 are reduced, so that the overall height of the outlet segment 220 and a circuit board 300 is relatively small.

[0104] In one embodiment, the number of the bending segments 230 in each wire 200 is less than or equal to 5. If each wire 200 includes a smaller number of bending segments 230, the stator 10 includes a larger number of wires 200 and a larger number of outgoing wire segments 220. A larger number of outgoing wire segments 220 are connected through a circuit board 300, which is beneficial to reducing the axial size of the stator 10.

[0105] See also Figure 6 , Figure 6 A schematic diagram of a stator 10 provided in an embodiment of the present application. In one embodiment, a circuit board 300 includes a plurality of sub-boards 320, and the plurality of sub-boards 320 are stacked and arranged axially along the stator core 100. Among them, the plurality of sub-boards 320 are electrically connected to each other. Each sub-board 320 is plugged with a portion of the outgoing line segment 220. The outgoing line segment 220 arranged between a circuit board 300 and the stator core 100 is respectively divided into a plurality of parts, and the plurality of partial outgoing line segments 220 are respectively plugged into a plurality of sub-boards 320. In the embodiment of the present application, a circuit board 300 includes a plurality of sub-boards 320, which increases the board area of ​​a circuit board 300. This allows a circuit board 300 to have a larger space for plugging the outgoing line segment 220. A circuit board 300 has a greater flow capacity, so that a circuit board 300 can adapt to a stator 10 with a larger number of wires 200, improves the adaptability of a circuit board 300, and can optimize the internal routing of a circuit board 300.

[0106] In one embodiment, in any two sub-plates 320, the distance between one sub-plate 320 and the stator core 100 along the axial direction of the stator core 100 is smaller than the distance between the other sub-plate 320 and the stator core 100, and the outer diameter of one sub-plate 320 is smaller than the outer diameter of the other sub-plate 320. Among them, the outer diameters of each sub-plate 320 are different. In the embodiment of the present application, along the axial direction of the stator core 100, the outer diameter of the sub-plate 320 that is smaller from the stator core 100 is smaller, so that the outgoing line segment 220 can be smoothly plugged into the sub-plate 320 farther from the stator core 100. And the sub-plate 320 closer to the stator core 100 can form an avoidance space for the sub-plate 320 farther from the stator core 100, shortening the connection distance between the outgoing line segment 220 and the sub-plate 320 farther from the stator core 100, which is conducive to reducing the overall size of the stator 10.

[0107] In one embodiment, one straight line segment 210 is connected to one sub-board 320 through one outgoing line segment 220, and another straight line segment 210 is connected to another sub-board 320 through another outgoing line segment 220. Along the radial direction of the stator core 100, the distance between one straight line segment 210 and the inner circumference of the stator core 100 is less than or equal to the distance between another straight line segment 210 and the inner circumference of the stator core 100. Among them, one outgoing line segment 220 and another outgoing line segment 220 are both exposed at one end of the stator core 100 facing one circuit board 300.

[0108] In the embodiment of the present application, since the outer diameter of one sub-plate 320 is smaller than the outer diameter of the other sub-plate 320, one straight line segment 210 is arranged close to the inner circumference of the stator core 100, shortening the distance between one outgoing line segment 220 and one sub-plate 320, which helps shorten the length of one outgoing line segment 220, thereby reducing the axial height of one outgoing line segment 220. Another straight line segment 210 is arranged close to the outer circumference of the stator core 100, shortening the distance between another outgoing line segment 220 and another sub-plate 320, which helps shorten the length of another outgoing line segment 220, thereby reducing the axial height of another outgoing line segment 220.

[0109] In one embodiment, the plurality of outgoing line segments 220 arranged between the stator core 100 and a circuit board 300 are divided into multiple layers, and the multiple layers of outgoing line segments 220 are arranged radially along the stator core 100. The multiple layers of outgoing line segments 220 are plugged into the multiple sub-boards 320 respectively. Among any two layers of outgoing line segments 220, one layer of outgoing line segments 220 is used to plug into one sub-board 320, and the other layer of outgoing line segments 220 is used to plug into another sub-board 320. In particular, along the radial direction of the stator core 100, the distance between one layer of outgoing line segments 220 and the inner circumference of the stator core 100 is smaller than the distance between another layer of outgoing line segments 220 and the inner circumference of the stator core 100, and the outer diameter of one sub-board 320 is smaller than the outer diameter of another sub-board 320.

[0110] In the embodiment of the present application, the inner layer of the wire segment 220 is plugged into a sub-board 320 that is closer and has a smaller outer diameter, and the outer layer of the wire segment 220 is plugged into a sub-board 320 that is farther away and has a larger outer diameter. The wire segments 220 are plugged in layers, which helps to shorten the connection length between each wire segment 220 and each sub-board 320, thereby reducing the overall height of the multiple wire segments 220 and the multiple sub-boards 320 along the axial direction.

[0111] See also Figure 7 , Figure 8 and Fig. 9 . Figure 7 A schematic diagram of a motor 4 is provided for one embodiment of the present application. Figure 8 A three-dimensional diagram of a stator 10 is provided for one embodiment of the present application. Fig. 9 A schematic diagram of a stator 10 provided in one embodiment of the present application. In one embodiment, the motor 4 further includes another circuit board 300, and the another circuit board 300, the stator core 100 and the circuit board 300 are arranged axially along the stator core 100. Among the outgoing wire segments 220 of the plurality of wires 200, part of the outgoing wire segments 220 are exposed at one end of the stator core 100 facing one circuit board 300. Another part of the outgoing wire segments 220 are exposed at one end of the stator core 100 facing another circuit board 300. The outgoing wire segments 220 arranged axially between another circuit board 300 and the stator core 100 along the stator core 100 are plugged into another circuit board 300.

[0112] In the embodiment of the present application, two circuit boards 300 are used together to realize the conduction between multiple wires 200, and the way to realize the conduction between multiple wires 200 is more convenient. The outgoing wire segments 220 exposed at both ends of the stator core 100 are respectively plugged into the two circuit boards 300, which is conducive to reducing the long-distance same-layer cross-connection and cross-layer connection between the outgoing wire segments 220 exposed at one end of the stator core 100, and is conducive to reducing the long-distance same-layer cross-connection and cross-layer connection between the outgoing wire segments 220 exposed at the other end of the stator core 100. Thereby, the axial height of the outgoing wire segment 220 exposed at one end of the stator core 100 is effectively reduced, and the axial height of the outgoing wire segment 220 exposed at the other end of the stator core 100 is reduced, and the overall size of the stator 10 is reduced.

[0113] See also Fig. 9 In one embodiment, the two outgoing wire segments 220 of each wire 200 are respectively exposed at the two ends of the stator core 100. The two outgoing wire segments 220 of each wire 200 are respectively plugged into the two circuit boards 300. In the embodiment of the present application, the structures of the multiple wires 200 are similar and all have the same two ends, which is conducive to simplifying the process of installing the multiple wires 200 to the stator core 100 and optimizing the routing of the two circuit boards 300.

[0114] See also Fig. 9 In one embodiment, each wire 200 includes a straight segment 210 and two outgoing segments 220. The two outgoing segments 220 connected by a straight segment 210 are respectively exposed at both ends of the stator core 100 and are respectively plugged into two circuit boards 300. In the embodiment of the present application, the structure of each wire 200 is simple, and the process of installing multiple wires 200 to the winding slots 110 is relatively simple, which reduces the difficulty of assembling and preparing the stator 10. Each wire 200 does not include a bending segment 230, and both ends of the stator core 100 along the axial direction are exposed as outgoing segments 220, and all the outgoing segments 220 are plugged into two circuit boards 300, which can effectively reduce the end height of the stator 10 along the axial direction, thereby effectively reducing the axial size of the stator 10.

[0115] See also Fig.10 , Fig.10 Schematic diagram of a stator 10 provided in one embodiment of the present application. In one embodiment, two outgoing wire segments 220 of each wire 200 are exposed at the same end of the stator core 100. Among them, two outgoing wire segments 220 of some wires 200 are exposed at one end of the stator core 100, and two outgoing wire segments 220 of another part of the wires 200 are exposed at the other end of the stator core 100. In the embodiment of the present application, the structures of multiple wires 200 are similar and the wires are connected at the same end, which is conducive to simplifying the process of installing multiple wires 200 to the stator core 100.

[0116] See also Fig.11 , Fig.11 A schematic diagram of a stator 10 provided in an embodiment of the present application. In one embodiment, among the multiple wires 200, two outgoing wire segments 220 of some of the wires 200 are exposed at the same end of the stator core 100, and two outgoing wire segments 220 of another part of the wires 200 are respectively exposed at two ends of the stator core 100. In the embodiment of the present application, the multiple wires 200 have diversified outgoing wire modes, which is conducive to adjusting the positions of the multiple outgoing wire segments 220 according to specific circumstances, so as to optimize the routing in the two circuit boards 300.

[0117] See also Fig. 9 and Fig.11In one embodiment, the plurality of wires 200 include at least one wire 200. The two outgoing wire segments 220 of each of the at least one wire 200 are respectively plugged into a circuit board 300 and another circuit board 300. Among them, in the at least one wire 200, the two outgoing wire segments 220 of each wire 200 are respectively exposed at both ends of the stator core 100. In the embodiment of the present application, the two circuit boards 300 are connected through at least one wire 200, and a three-phase lead wire is provided on one of the circuit boards 300 to receive the alternating current transmitted by the motor controller, which can be transmitted to the other circuit board 300 through at least one wire 200, thereby reducing the number of three-phase lead wires and simplifying the connection line between the circuit board 300 and the motor controller. In addition, the two circuit boards 300 are electrically connected through at least one wire 200, and there is no need to additionally set up a cable connecting the two circuit boards 300, which is conducive to the miniaturization of the stator 10.

[0118] In one implementation, one circuit board 300 and another circuit board 300 may also be connected via a cable.

[0119] See also Fig.12 In one embodiment, the other circuit board 300 includes a plurality of sub-boards 320, and the plurality of sub-boards 320 are stacked and arranged along the axial direction of the stator core 100. In one embodiment, the plurality of wires 200 include one wire 200, and the two outgoing wire segments 220 of the one wire 200 are respectively exposed at both ends of the stator core 100, and are respectively plugged into one sub-board 320 of one circuit board 300 and another sub-board 320 of another circuit board 300. Along the axial direction of the stator core 100, the spacing between one sub-board 320 of one circuit board 300 and the stator core 100 is equal to the spacing between another sub-board 320 of another circuit board 300 and the stator core 100. Along the radial direction of the stator core 100, the outer diameter of one sub-board 320 of one circuit board 300 is equal to the outer diameter of another sub-board 320 of another circuit board 300.

[0120] In the embodiment of the present application, two circuit boards 300 are provided with multiple sub-boards 320, so that the two circuit boards 300 have a larger space for plugging out the wire segments 220. The multiple sub-boards 320 of the two circuit boards 300 are arranged in a regular manner, which is conducive to the assembly of the stator 10 and reduces the size of the stator 10.

[0121] See also Fig.13 , Fig.13A schematic diagram of a stator 10 provided in one embodiment of the present application. In one embodiment, each outgoing line segment 220 includes a radial segment 221 and an axial segment 222. The radial segment 221 is used to connect the axial segment 222 and a straight segment 210. Among them, the axial segment 222 arranged between a circuit board 300 and the stator core 100 along the axial direction of the stator core 100 is used to be plugged into a circuit board 300. The axial segment 222 arranged between another circuit board 300 and the stator core 100 along the axial direction of the stator core 100 is used to be plugged into another circuit board 300.

[0122] In the embodiment of the present application, the radial segment 221 and the axial segment 222 are arranged at an angle, and the radial segment 221 can be used to adjust the position of the axial segment 222 so that the axial segment 222 can be smoothly plugged into the connecting hole 310 of the circuit board 300.

[0123] In one embodiment, the angle between the radial segment 221 and the axial segment 222 is greater than 0° and less than 180°. This facilitates the connection of the axial segment 222 to the connection hole 310 that is offset from the straight segment 210. For example, the projection of the connection hole 310 along the axial direction of the stator core 100 does not overlap with the projection of the straight segment 210, and the radial segment 221 is bent toward the connection hole 310 so that the projection of the axial segment 222 along the axial direction of the stator core 100 overlaps with the connection hole 310, so that the axial segment 222 can be plugged into the connection hole 310.

[0124] In one embodiment, the angle between the radial segment 221 and the axial segment 222 is 0° or 180°. In this case, the radial segment 221 and the axial segment 222 are the same straight line. The outgoing line segment 220 has a simple structure, which simplifies the preparation process of the stator 10. The outgoing line segment 220 is short, which is conducive to reducing the axial size of the stator 10.

[0125] In one embodiment, the axial section 222 is perpendicular to the circuit board 300. When the axial section 222 is used to be plugged into one circuit board 300, the axial section 222 is perpendicular to the one circuit board 300. When the axial section 222 is used to be plugged into another circuit board 300, the axial section 222 is perpendicular to the other circuit board 300. In one embodiment, the circuit board 300 is perpendicular to the axial direction of the stator core 100, and the axial section 222 is parallel to the axial direction of the stator core 100. In the embodiment of the present application, by providing the radial section 221, it is ensured that the axial section 222 can be plugged into the circuit board 300 in a direction perpendicular to the circuit board 300, and the plugging method is relatively simple.

[0126] In one embodiment, the radial segment 221 is bent from a straight segment 210 connected thereto along the radial direction of the stator core 100. The projection of the radial segment 221 along the axial direction of the stator core 100 is parallel to the radial direction of the stator core 100. In the embodiment of the present application, the radial segment 221 is bent along the radial direction, and the radial segment 221 can make full use of the radial space between the stator core 100 and the circuit board 300, reducing the mutual interference between the adjacent radial segments 221 in the circumferential direction, and facilitating the axial segment 222 to be plugged into the circuit board 300. In addition, the axial stacking between the adjacent radial segments 221 in the circumferential direction is reduced, which is conducive to reducing the axial size of the stator 10.

[0127] In one embodiment, the length of the radial segment 221 is greater than or equal to the length of the axial segment 222. The length of the radial segment 221 refers to its own length, that is, the length of the radial segment 221 along its extension direction. Similarly, the length of the axial segment 222 is also its own length. In one embodiment, the axial segment 222 is parallel to the axial direction of the stator core 100, and the length of the axial segment 222 is the length of the axial segment 222 along the axial direction of the stator core 100.

[0128] In the embodiment of the present application, the radial section 221 is longer in length so as to better adjust the plugging position of the axial section 222 and the circuit board 300. The axial section 222 is shorter in length so as to be accommodated in the connecting hole 310 of the circuit board 300, thereby reducing the axial dimension of the stator 10.

[0129] It is worth noting that when the included angle between the radial segment 221 and the axial segment 222 is greater than 0° and less than 180°, the length of the radial segment 221 may be equal to the length of the axial segment 222 .

[0130] In one embodiment, the length of the axial section 222 is greater than or equal to the height of a circuit board 300 along the axial direction of the stator core 100. This is conducive to achieving electrical connection between the axial section 222 and a circuit board 300, and facilitates fixing the axial section 222 to a circuit board 300. Exemplarily, after the axial section 222 is plugged into the connection hole 310 of a circuit board 300, the insertion depth of the axial section 222 is deep, which is conducive to welding the axial section 222 to a circuit board 300 from the side of the circuit board 300 away from the stator core 100.

[0131] See also Fig.14 , Fig.15 and Fig.16 , Fig.14 A three-dimensional diagram of a stator 10 is provided for one embodiment of the present application. Fig.15 A cross-sectional view of a stator 10 is provided for one embodiment of the present application. Fig.16A schematic diagram of a stator 10 provided in an embodiment of the present application. In one embodiment, each winding slot 110 is used to accommodate a plurality of straight line segments 210 stacked in sequence along the radial direction of the stator core 100. In two outgoing line segments 220 respectively connected to two adjacent straight line segments 210 in one winding slot 110, the distance between the axial segment 222 of one outgoing line segment 220 and the axial segment 222 of another outgoing line segment 220 along the radial direction of the stator core 100 is greater than the distance between the two straight line segments 210.

[0132] The two straight segments 210 are accommodated in the same winding slot 110, and the two straight segments 210 are arranged adjacent to each other along the radial direction of the stator core 100. The two outgoing line segments 220 are used to connect the two straight segments 210 respectively.

[0133] Generally, in order to maintain a high slot fill rate, the distance between two adjacent straight segments 210 in the winding slot 110 is zero or relatively small. In the embodiment of the present application, by adjusting the bending angle of the radial segment 221, the spacing between the axial segments 222 of the two outlet segments 220 is relatively large, which increases the operating space for the two axial segments 222 to be plugged into the circuit board 300, making the plugging operation easier to perform. In addition, in order to facilitate wiring and opening holes, the circuit board 300 needs to have a certain gap between two radially adjacent connection holes 310. The larger spacing between the two axial segments 222 can better adapt to being plugged into two spaced connection holes 310.

[0134] See also Fig.16 In one embodiment, the angle between the radial section 221 and the axial section 222 of one outgoing wire section 220 is different from the angle between the radial section 221 and the axial section 222 of another outgoing wire section 220. Since the multiple connection holes 310 in each column of connection holes 310 are arranged at intervals in the radial direction, and the multiple straight sections 210 in each winding slot 110 are arranged in layers, the length of each column of connection holes 310 is greater than the length of the multiple straight sections 210.

[0135] In the embodiment of the present application, the angles between the radial section 221 and the axial section 222 of two adjacent outgoing line sections 220 are different, so that the axial sections 222 of the two outgoing line sections 220 can be respectively plugged into two radially adjacent and spaced connection holes 310 .

[0136] See also Fig.15 and Fig.16In one embodiment, of the two outgoing wire segments 220 respectively connected to the two straight line segments 210 in one winding slot 110, a radial segment 221 of one outgoing wire segment 220 along the radial direction of the stator core 100 is bent from the one straight line segment 210 connected thereto away from the axis of the stator core 100, and a radial segment 221 of the other outgoing wire segment 220 along the radial direction of the stator core 100 is bent from the other straight line segment 210 connected thereto toward the axis of the stator core 100. The distance between one straight line segment 210 and the axis of the stator core 100 is greater than the distance between the other straight line segment 210 and the axis of the stator core 100.

[0137] The two straight segments 210 are any two straight segments 210 in one winding slot 110. The bending directions of the two radial segments 221 connected to the two straight segments 210 are opposite. The opening of the angle formed by the radial segment 221 of one outgoing segment 220 and the straight segment 210 connected to it is away from the axis of the stator core 100, and the opening of the angle formed by the radial segment 221 of another outgoing segment 220 and the straight segment 210 connected to it is toward the axis of the stator core 100.

[0138] In the embodiment of the present application, the radial segment 221 connected to a straight segment 210 close to the outer circumference of the stator core 100 is bent toward the outer circumference of the stator core 100, and the radial segment 221 connected to another straight segment 210 close to the inner circumference of the stator core 100 is bent toward the inner circumference of the stator core 100, thereby reducing the intersection between the radial segments 221 and shortening the length of the radial segments 221, which is beneficial to reducing the axial distance between the corresponding circuit board 300 and the stator core 100, thereby facilitating the miniaturization of the stator 10.

[0139] In one embodiment, the plurality of straight segments 210 in each winding slot 110 correspond to a plurality of layer sequences. In two outgoing wire segments 220 respectively connected to two straight segments 210 of the same layer sequence in two winding slots 110, the included angle between the radial segment 221 and the axial segment 222 of one outgoing wire segment 220 is the same as the included angle between the radial segment 221 and the axial segment 222 of the other outgoing wire segment 220.

[0140] For the convenience of description, along the radial direction of the stator core 100 from the outer circumference of the stator core 100 toward the inner circumference of the stator core 100, the n layers in each winding slot 110 are sequentially referred to as the first layer, the second layer, the third layer, ..., the nth layer, where n is a positive integer and is greater than or equal to 2. n is equal to the number of straight line segments 210 accommodated in one winding slot 110. One straight line segment 210 occupies one layer of one winding slot 110. Exemplarily, along the radial direction from the outer circumference of the stator core 100 toward the inner circumference of the stator core 100, the first layer in each winding slot 110 is the position occupied by the first straight line segment 210 in the winding slot 110, and the second layer is the position occupied by the second straight line segment 210 in the winding slot 110.

[0141] Along the radial direction of the stator core 100, the distances between the same layer in different winding slots 110 and the inner circumference of the stator core 100 are the same or substantially the same. Exemplarily, the distance between the first layer in one winding slot 110 and the inner circumference of the stator core 100 is equal to or substantially equal to the distance between the first layer in another winding slot 110 and the inner circumference of the stator core 100.

[0142] The layer sequence indicates the sequence number of the layer, that is, the number of the layer. The two straight segments 210 are respectively accommodated in the two winding slots 110, and the layer sequence of one straight segment 210 in one winding slot 110 is the same as the layer sequence of the other straight segment 210 in the other winding slot 110. The two outgoing line segments 220 are respectively connected to the two straight segments 210. The two outgoing line segments 220 are exposed at the same end of the stator core 100 or the two outgoing line segments 220 are respectively exposed at both ends of the stator core 100.

[0143] In the embodiment of the present application, among the two outgoing line segments 220, the angle between the radial segment 221 and the axial segment 222 of one outgoing line segment 220 is consistent with the angle between the radial segment 221 and the axial segment 222 of the other outgoing line segment 220, the outgoing line segments 220 connected to the same layer sequence straight line segments 210 have similar structures, and the outgoing line segments 220 are arranged regularly, which simplifies the wire winding process of multiple wires 200 and is conducive to reducing the size of the stator 10.

[0144] In one embodiment, the length of the radial segment 221 of one outgoing line segment 220 is equal to the length of the radial segment 221 of another outgoing line segment 220. In the embodiment of the present application, the outgoing line segments 220 connected to the same layer sequence straight line segments 210 have similar structures, which is conducive to reducing the overall size of the multiple radial segments 221 along the axial direction, thereby reducing the size of the stator 10.

[0145] In one embodiment, along the axial direction of the stator core 100, the projection of the radial segment 221 of one outgoing line segment 220 is spaced from the projection of the radial segment 221 of another outgoing line segment 220. In the embodiment of the present application, the projection of the radial segment 221 of one outgoing line segment 220 along the axial direction does not overlap with the projection of the radial segment 221 of another outgoing line segment 220 along the axial direction, thereby reducing the increase in axial height caused by the axial overlap of the two radial segments 221. In the present application, the circumferential interference between the outgoing line segments 220 is small, which is conducive to reducing the axial size of the outgoing line segments 220, thereby reducing the size of the stator 10.

[0146] In one embodiment, of the two outgoing line segments 220 connected to a straight line segment 210, the angle between the radial segment 221 and the axial segment 222 of one outgoing line segment 220 is the same as the angle between the radial segment 221 and the axial segment 222 of the other outgoing line segment 220. The length of the radial segment 221 of one outgoing line segment 220 is equal to the length of the radial segment 221 of the other outgoing line segment 220. The two outgoing line segments 220 are respectively exposed at both ends of the stator core 100. In the embodiment of the present application, the outgoing line segments 220 connected to the same straight line segment 210 have similar structures, which is conducive to regularizing the arrangement between the outgoing line segments 220, reducing the overall size of the multiple outgoing line segments 220 along the axial direction, and thus reducing the size of the stator 10.

[0147] In one embodiment, the wire 200 is a flat wire. The motor 4 is a flat wire motor. In the embodiment of the present application, the plurality of wires 200 are in the form of flat wires, which is beneficial to improving the slot filling rate of the stator 10, thereby facilitating improving the output power of the motor 4.

[0148] In one embodiment, the plurality of wires 200 of each branch of each phase winding are electrically connected via one or two circuit boards 300. For example, Fig.17 As shown, Fig.17 A schematic diagram of the connection of two branches of a U-phase winding provided in an embodiment of the present application. A plurality of winding slots 110 are sequentially arranged along the circumference of the stator core 100. For the convenience of description, the plurality of winding slots 110 are sequentially named as the first slot, the second slot, the third slot, ... the nth slot, where n is a positive integer greater than or equal to 2.

[0149] The winding process of one branch in the plurality of winding slots 110 is as follows: the winding starts from one end of the stator core 100, the branch passes through the stator core 100 from the first layer of the third slot to the other end, and passes through the stator core 100 from the first layer of the first slot to one end of the stator core 100, and then passes through the first layer of the 44th slot, the second layer of the second slot, the third layer of the eighth slot, the fourth layer of the 14th slot, the fifth layer of the 20th slot, the fifth layer of the 2nd slot, the fifth layer of the 3rd slot, the fifth layer of the 4th slot, the fifth layer of the 5th slot, the fifth layer of the 6th slot, the fifth layer of the 7th slot, the fifth layer of the 8th slot, the fifth layer of the 9th slot, the fifth layer of the 10th slot, the fifth layer of the 11th slot, the fifth layer of the 12th slot, the fifth layer of the 13th slot, the fifth layer of the 14th slot, the fifth layer of the 15th slot, the fifth layer of the 16th slot, the fifth layer of the 17th slot, the fifth layer of the 18th slot, the fifth layer of the 19th slot, the fifth layer of the 21st slot, the fifth layer of the 19th slot, the fifth layer of the 23rd slot, the fifth layer of the 24th slot, the fifth layer of the 25th slot, the fifth layer of the 26th slot, the fifth layer of the 27th slot, the fifth layer of the 28th slot, the fifth layer of the 29th slot, the fifth layer of the 30th slot, the fifth layer of the 29th slot, the fifth layer of the 29th slot, the fifth layer of the 28th slot, the fifth layer of the 29th slot, the fifth layer of the 29th slot, the fifth layer of the 29th 6th slot, 6th floor, 32nd slot, 7th floor, 26th slot, 7th floor, 20th slot, 6th floor, 14th slot, 5th floor, 8th slot, 4th floor, 2nd slot, 3rd floor, 44th slot, 2nd floor, 38th slot, 1st floor, 31st slot, 1st floor, 37th slot, 2nd floor, 43rd slot, 1st slot, 4th floor, 7th slot, 5th floor, 13th slot, 6th floor, 19th slot, 7th slot, 7th slot, 6th floor, 1 5th layer of slot 43, 4th layer of slot 37, 3rd layer of slot 31, 2nd layer of slot 25, 1st layer of slot 20, 1st layer of slot 26, 3rd layer of slot 32, 4th layer of slot 38, 5th layer of slot 44, 6th layer of slot 2, 7th layer of slot 8, 7th layer of slot 2, 6th layer of slot 44, 5th layer of slot 38, 4th layer of slot 32, 3rd layer of slot 36, 2nd layer of slot 20, The 14th slot, the 1st layer, the 7th slot, the 1st layer, the 13th slot, the 2nd layer, the 19th slot, the 3rd layer, the 25th slot, the 4th layer, the 31st slot, the 5th layer, the 37th slot, the 43rd slot, the 7th layer, the 37th slot, the 6th layer, the 31st slot, the 5th layer, the 19th slot, the 4th layer, the 13th slot, the 3rd layer, the 7th slot, the 2nd layer, and passes through the stator core 100 from the 4th slot, the 1st layer to one end of the stator core 100.

[0150] It is worth noting that the above winding method is only for illustration, and each branch of each phase in the embodiment of the present application may also adopt other types of connection methods. Through the circuit board 300, the multiple wires 200 in the present application can be adapted to a stator 10 with a variety of winding slots 110 numbers, a variety of winding slots 110 layers, and multiple branches.

[0151] The above is a detailed introduction to the motor, powertrain and electric vehicle in which the motor winding is plugged into the circuit board provided in the embodiments of the present application. Specific examples are used in this article 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 general technical personnel in this field, according to the ideas 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 motor whose motor winding is plugged into a circuit board, characterized in that: The motor comprises a stator and a rotor, wherein the stator is sleeved on the outer circumference of the rotor, and the stator comprises: A stator core, the stator core comprising a plurality of winding slots; A plurality of conductors, each conductor comprising at least one straight line segment and two outgoing line segments, each of the straight line segments being received in one of the winding slots, each of the outgoing line segments being used to connect one of the straight line segments, and the two outgoing line segments being exposed from the stator core along the axial direction of the stator core; A circuit board is provided, wherein the circuit board and the stator core are arranged axially along the stator core, and the outgoing line segment arranged axially between the circuit board and the stator core along the stator core is plugged into the circuit board.

2. The motor according to claim 1, characterized in that Along the radial direction of the stator core, a distance between an inner circumferential surface of the circuit board and an outer circumferential surface of the circuit board is greater than or equal to a depth of the winding slot.

3. The motor according to claim 1, characterized in that The inner diameter of the circuit board along the radial direction of the stator core is smaller than or equal to the inner diameter of the stator core, and the outer diameter of the circuit board along the radial direction of the stator core is smaller than or equal to the outer diameter of the stator core.

4. The motor according to claim 2, characterized in that The inner diameter of the circuit board along the radial direction of the stator core is smaller than or equal to the inner diameter of the stator core, and the outer diameter of the circuit board along the radial direction of the stator core is smaller than or equal to the outer diameter of the stator core.

5. The motor according to claim 1, characterized in that The circuit board comprises a plurality of rows of connection holes, each of which is used to accommodate one of the outgoing wire segments, the plurality of rows of connection holes are arranged at intervals along the circumference of the stator core, and each row of connection holes comprises a plurality of connection holes arranged at intervals along the radial direction of the stator core.

6. The motor according to any one of claims 1 to 5, characterized in that: The two outgoing wire segments of each of the conductors are arranged between the stator core and the one circuit board along the axial direction of the stator core, wherein: Each of the conductive wires further comprises at least one bent segment, each of the bent segments is used to connect two of the straight segments, and each of the bent segments is exposed from the stator core along the axial direction of the stator core.

7. The motor according to claim 6, characterized in that Along the axial direction of the stator core, the distance between the one circuit board and the stator core is smaller than the height of the bent section exposed at one end of the stator core away from the one circuit board.

8. The motor according to any one of claims 1 to 5 and 7, characterized in that: The circuit board comprises a plurality of sub-boards, and the plurality of sub-boards are stacked and arranged along the axial direction of the stator core, wherein: Among any two of the sub-plates, the distance between one of the sub-plates and the stator core along the axial direction of the stator core is smaller than the distance between the other sub-plate and the stator core, and the outer diameter of the one sub-plate is smaller than the outer diameter of the other sub-plate.

9. The motor according to claim 8, characterized in that One of the straight line segments is connected to the one sub-plate via one of the outgoing line segments, and the other straight line segment is connected to the other sub-plate via another of the outgoing line segments. The distance between the one straight line segment and the inner circumference of the stator core along the radial direction of the stator core is less than or equal to the distance between the other straight line segment and the inner circumference of the stator core.

10. The motor according to any one of claims 1 to 5, 7 and 9, characterized in that: The motor further comprises another circuit board, wherein the another circuit board, the stator core and the one circuit board are arranged axially along the stator core, and the plurality of wires comprises at least one wire, wherein: The two outgoing wire sections of each of the at least one conducting wire are respectively plugged into the one circuit board and the other circuit board.

11. The motor according to any one of claims 1 to 5, 7 and 9, characterized in that: Each of the outgoing line segments includes a radial segment and an axial segment, the radial segment is used to connect the axial segment and one of the straight line segments, and the axial segment arranged between the one circuit board and the stator core along the axial direction of the stator core is used to be plugged into the one circuit board, wherein: The length of the radial segment is greater than or equal to the length of the axial segment; The length of the axial section is greater than or equal to the height of the circuit board along the axial direction of the stator core.

12. The motor according to claim 11, characterized in that Each of the winding slots is used to accommodate a plurality of straight line segments stacked in sequence along the radial direction of the stator core, wherein: In two outgoing line segments respectively connected to two adjacent straight line segments in one winding slot, an included angle between the radial segment and the axial segment of one outgoing line segment is different from an included angle between the radial segment and the axial segment of the other outgoing line segment; Along the radial direction of the stator core, a distance between the axial section of the one outgoing line segment and the axial section of the other outgoing line segment is greater than a distance between the two straight line segments.

13. The motor according to claim 11, characterized in that In the two outgoing wire segments respectively connected to the two straight line segments in one winding slot, the radial segment of one outgoing wire segment along the radial direction of the stator core is bent from the one straight line segment connected thereto away from the axis of the stator core, and the radial segment of the other outgoing wire segment along the radial direction of the stator core is bent from the other straight line segment connected thereto toward the axis of the stator core, wherein: The distance between the one straight line segment and the axis of the stator core is greater than the distance between the other straight line segment and the axis of the stator core.

14. The motor according to claim 11, characterized in that The plurality of straight line segments in each winding slot respectively correspond to a plurality of layer sequences, wherein: In two outgoing line segments respectively connected to two straight line segments of the same layer sequence in two winding slots, the included angle between the radial segment and the axial segment of one of the outgoing line segments is the same as the included angle between the radial segment and the axial segment of the other outgoing line segment; The length of the radial section of the one outgoing line segment is equal to the length of the radial section of the other outgoing line segment; Along the axial direction of the stator core, a projection of the radial section of the one outgoing wire segment is spaced apart from a projection of the radial section of the other outgoing wire segment.

15. A powertrain, characterized in that: The power assembly includes a reducer and a motor as described in any one of claims 1 to 14, the motor includes a motor shaft, the motor rotor is sleeved and fixed on the motor shaft, and the reducer input shaft of the reducer is used for transmission connection with the motor shaft.

16. An electric vehicle, characterized in that: The electric vehicle includes wheels, a battery pack and a motor as described in any one of claims 1 to 14 or a powertrain as described in claim 15, wherein the motor or the powertrain is used to receive power from the battery pack and drive the wheels.

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