MOTOR CONTROL WITH FLOW-FROM CAPACITORS, DRIVE ARRANGEMENT AND VEHICLE

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of new energy, and in particular to a motor controller, a drive assembly, and a vehicle. The present disclosure claims priorities to Chinese Patent Application Nos. CN201911247127.2, CN201911247126.8, CN201911246892.2, CN201911246844.3, CN201911247025.0, CN201922178663.3, CN201922178661.4, CN201922178480.1, CN201922178476.5, CN201922180773.3, and CN201922178390.2, filed on December 6, 2019.BACKGROUND

[0002] New energy vehicles are environmentally friendly and low-polluting because they do not use gasoline or diesel as fuel to produce power. With the vigorous promotion of new energy power generation technologies using water energy, wind energy, solar energy, and nuclear energy, new energy vehicles are gradually promoted. There are various types of new energy vehicles, including new energy electric cars, new energy electric buses, new energy electric trucks, new energy electric cleaning vehicles, new energy electric rail vehicles, new energy electric flying vehicles, and new energy electric shipping vehicles.

[0003] The new energy vehicle is generally equipped with batteries, a motor controller, a motor and power generation devices. Power transistors in the motor controller receive direct current (DC) output from the battery, and invert the DC into alternating current (AC) for outputting to the motor. The motor outputs a rotational driving force to drive the power generation devices, such as wheels and blades, thereby driving the vehicle to travel.

[0004] The drive assembly (i.e. the motor and the motor controller) in the vehicle can be integrated to reduce its footprint, so as to free up more space for passengers, batteries, etc. In the case where the motor and the motor controller are integrated, to achieve an efficient integration of the drive assembly, it is necessary to consider an optimization of connection structures and related layout between the motor and the motor controller, cooling of the motor and the motor controller, optimal layout of related electrical connection structures, and an easiness of assembly of related components.

[0005] Application with publication number of US2006 / 002054A1 disclosed an electric machine including multiple windings, a switch circuit connected to each of the windings, a positive bus bar, and a negative bus bar. The switch circuits are in communication with the windings to selectively energize each of the windings. The positive bus bar is a conductive plate connected to the switch circuits and the negative bus bar is a conductive plate positioned substantially parallel to the positive bus bar and connected electrically to the switch circuits.

[0006] Application with publication number of US2019 / 274219A1 disclosed a printed circuit board element having at least one electronic switching element integrated in the printed circuit board element, which switching element comprises two semiconductor switches introduced into a layer sequence of the printed circuit board element and at least two busbars formed to contact the semiconductor switches, wherein the busbars run substantially above one another in the layer sequence of the printed circuit board element and at least one intermediate circuit capacitor arranged between the two busbars is introduced into the layer sequence of the printed circuit board element.SUMMARY Technical objectives

[0007] A first objective of the present disclosure is to provide a motor controller provided with a laminated busbar assembly laminated stably with capacitors.

[0008] A second objective of the present disclosure is to provide a drive assembly provided with the above motor controller.

[0009] A third objective of the present disclosure is to provide a vehicle provided with the above drive assembly.Technical Solutions

[0010] In order to achieve the first objective of the present disclosure, the present disclosure provides a motor controller. The motor controller includes a laminated busbar assembly and multiple capacitors, wherein the laminated busbar assembly includes a main circuit board, a positive electrode connection plate, and a negative electrode connection plate; the positive electrode connection plate is a bottomed cylinder, which encloses a device accommodating space; an outer edge of the positive electrode connection plate is provided with multiple positive electrode pins in a circumferential direction of the positive electrode connection plate; the negative electrode connection plate is circular, and an outer edge thereof is provided with multiple negative electrode pins in a circumferential direction of the negative electrode connection plate; the negative electrode connection plate covers the device accommodating space; the main circuit board, the negative electrode connection plate, and the positive electrode connection plate are laminated in sequence along an axial direction of the motor controller; the multiple positive electrode pins and the multiple negative electrode pins pass through the main circuit board and are electrically connected with the main circuit board; and the multiple capacitors are provided in the device accommodating space, and are connected between the positive electrode connection plate and the negative electrode connection plate.

[0011] Further, the positive electrode connection plate may be provided with a first collision avoidance hole at a center thereof, an inner ring wall at an outer circumference of the first collision avoidance hole, an outer ring wall surrounding an outer circumference of the inner ring wall, and a bottom ring wall located and connected between the inner ring wall and the outer ring wall of the positive electrode connection plate; and the inner ring wall, the outer ring wall, and the bottom ring wall may enclose an annular device accommodating space, in which the multiple capacitors may be distributed circumferentially.

[0012] Further, the bottom ring wall may be provided with multiple first electrical contacts, which may be circumferentially distributed, and may be connected with positive electrodes of the capacitors, respectively; the negative electrode connection plate may be provided with multiple second electrical contacts, which may be circumferentially distributed and may be connected with negative electrodes of the capacitors, respectively.

[0013] Further, a center of the negative electrode connection plate may be provided with a second collision avoidance hole and an inner edge of the negative electrode connection plate may be provided with negative electrode connection terminals; the second collision avoidance hole may communicate with the first collision avoidance hole; an end portion of the inner ring wall closer to the negative electrode connection plate may be provided with supporting platforms; an inner edge of the positive electrode connection plate may be provided with positive electrode connection terminals; the negative electrode connection plate may be adjacent to the supporting platforms; and projection planes of the positive electrode connection terminals and the negative electrode connection terminals, which are perpendicular to an axial direction of the motor controller, may be located inside a projection plane of the second collision avoidance hole perpendicular to the axial direction.

[0014] Further, the motor controller further may include a mounting shell; the mounting shell may be a bottomed cylinder, a bottom of which may be provided with a positioning post assembly extending along the axial direction; the mounting shell may enclose a mounting and accommodating space in which the positive electrode connection plate, the negative electrode connection plate, and the multiple capacitors are provided; the main circuit board covers the mounting and accommodating space; and the positioning post assembly may pass through the positive electrode connection plate and the negative electrode connection plate, and may fit with the main circuit board for position limiting.

[0015] Further, the mounting shell may be provided with a third collision avoidance hole at a center thereof, and connection and fixing platforms are provided in the third collision avoidance hole; and the connection and fixing platforms each may be provided with a positive electrode connection position and a negative electrode connection position.

[0016] Further, the positioning post assembly may include multiple first positioning posts and multiple second positioning posts; the multiple first positioning posts may be distributed in a circumferential direction; the multiple second positioning posts may be distributed in a circumferential direction, and may be located outside the multiple first positioning posts; and the multiple first positioning posts and the multiple second positioning posts may pass through the positive electrode connection plate and the negative electrode connection plate respectively; and two adjacent first positioning posts and two adjacent second positioning posts which are respectively adjacent to the two adjacent first positioning posts may enclose a capacitor positioning space in which one capacitor is located.

[0017] Further, a connecting line of one first positioning post and one second positioning post adjacent thereto may pass through an axis of the mounting shell.

[0018] In order to achieve the second objective of the present disclosure, the present disclosure provides a drive assembly provided with the above motor controller.

[0019] In order to achieve the third objective of the present disclosure, the present disclosure provides a vehicle provided with the above drive assembly.Solutions to the problem Beneficial effects of the present disclosure Beneficial effects

[0020] The collision avoidance holes are centrally provided. Thus, the projection planes of the positive electrode connection terminals and the negative electrode connection terminals, which are perpendicular to the axial direction, are located inside the projection plane of the second collision avoidance hole perpendicular to the axial direction. The positive electrode connection terminals and the negative electrode connection terminals are centrally arranged, which is convenient for connection, and the pins are arranged circumferentially, which effectively optimizes the circuit wiring layout.

[0021] The connection terminals are arranged centrally, and the pins are arranged circumferentially. Thus, the main circuit board has more central space for the driving circuit layout, thereby effectively optimizing the circuit wiring layout.

[0022] The positive electrode connection plate is a bottomed cylinder, which accommodates the multiple capacitors and realizes effective positioning of the capacitors. In addition, the negative electrode connection plate plays the role of covering and positioning, which provides desired support for the stable connection of the capacitors. The main circuit board, the negative electrode connection plate, the multiple capacitors and the positive electrode connection plate are laminated in sequence. The laminated structure reduces the axial dimension and achieves the compact purpose, and the laminated structure is simple and is easy for assembly, improving assembly efficiency.

[0023] The first collision avoidance hole is used for mounting, positioning and placement of terminals. The annular device accommodating space is used to hold the multiple capacitors, such that the multiple capacitors are distributed circumferentially and well supported and positioned. The axially arranged electrical contacts are respectively electrically connected with the two ends of the capacitor to ensure the electrical connection stability.

[0024] The negative electrode connection plate is stably provided on the supporting platform, and the positive electrode connection terminals and the negative electrode connection terminals are located in the second collision avoidance hole. This design realizes the centralized arrangement of terminals, optimizes the layout, and improves the connection efficiency. The mounting shell and the positioning post assembly provide stable support and fixation for the main circuit board, the positive electrode connection plate, the negative electrode connection plate, and even the motor controller.

[0025] The third collision avoidance hole of the mounting shell is used for assembly and positioning of other equipment. The connection and fixing platforms provide stable support for the connection of the positive electrode and negative electrode. The positioning posts provide support and positioning for the main circuit board, the positive electrode connection plate and the negative electrode connection plate. A capacitor positioning space is formed by the four positioning posts, which provides stable support for the connection of the capacitors and ensures the stability of the motor controller.

[0026] The radial arrangement of the first positioning posts and the second positioning posts is adapted to the arrangement direction of the capacitors which are arranged circumferentially, thereby further positioning the capacitors and improving the stability of the capacitors.BRIEF DESCRIPTION OF THE DRAWINGS Description of drawings

[0027] FIG. 1 is a structural view of a drive assembly according to an embodiment of a drive assembly of the present disclosure; FIG. 2 is a structural view of the drive assembly viewed from another perspective according to the embodiment of the drive assembly of the present disclosure; FIG. 3 is an exploded view of the drive assembly according to the embodiment of the drive assembly of the present disclosure; FIG. 4 is a structural view of the three-phase terminal block and a motor controller according to the embodiment of the drive assembly of the present disclosure; FIG. 5 is an exploded view of the three-phase terminal block and the motor controller according to the embodiment of the drive assembly of the present disclosure; FIG. 6 is an exploded view of a laminated busbar assembly according to the embodiment of the drive assembly of the present disclosure; FIG. 7 is a structural view of the motor controller with a main circuit board removed according to the embodiment of the drive assembly of the present disclosure; FIG. 8 is a structural view of the drive assembly with a cover removed according to the embodiment of the drive assembly of the present disclosure; FIG. 9 is an exploded view of the motor controller and a connecting assembly according to the embodiment of the drive assembly of the present disclosure; and FIG. 10 is an axial sectional view of the drive assembly according to the embodiment of the drive assembly of the present disclosure.

[0028] The present disclosure is described in further detail below with reference to the drawings and embodiments.DETAILED DESCRIPTION Implementations of the present disclosure Embodiment of Drive Assembly:

[0029] Referring to FIGS. 1 to 3, the drive assembly includes a housing 1, a cover 18, a casing 14, a motor controller 3, a bearing 17, a rotor 16, and a stator 15. The housing 1 is cylindrical, and the housing 1 is provided therein with a chamber along an axial direction of the housing 1.

[0030] Referring to FIGS. 4 and 5, the motor controller 3 includes a circuit board assembly, multiple capacitors 45, multiple power transistors 34, a holding member 32, a positioning frame 33 and a mounting shell 31. The circuit board assembly may adopt a conventional laminated copper clad circuit, etc. In this embodiment, the circuit board assembly is a laminated busbar assembly 4. The laminated busbar assembly 4 includes the main circuit board 43, a positive electrode connection plate 41, a negative electrode connection plate 42, and a three-phase connection plate assembly 44. The main circuit board 43 is provided with a copper clad circuit, a circuit element and a pad to form a control circuit.

[0031] Referring to FIGS. 6 and 7, the mounting shell 31 is a bottomed cylinder. The mounting shell 31 is provided with an inner ring wall 312 at a center thereof, and the inner ring wall 312 encloses a run-through third collision avoidance hole 3121. The mounting shell 31 is provided with an outer ring wall 311 surrounding the inner ring wall 312, and an annular bottom 313 is provided between the outer ring wall 311 and the inner ring wall 312. The outer ring wall 311, the inner ring wall 312 and the bottom 313 enclose a mounting and accommodating space. The bottom 313 of the mounting shell 31 is provided with a positioning post assembly extending along an axial direction of the motor controller 3. The positioning post assembly includes multiple first positioning posts 314 and multiple second positioning posts 315. The multiple first positioning posts 314 are distributed circumferentially, and the multiple second positioning posts 315 are also circumferentially distributed. The multiple second positioning posts 315 are located outside the multiple first positioning posts 314 away from an axis of the mounting shell 31. Each of the first positioning posts 314 has a diameter smaller than that of each of the second positioning posts 315. The multiple first positioning posts 314 and the multiple second positioning posts 315 pass through the positive electrode connection plate 41, the negative electrode connection plate 42 and the three-phase connection plate assembly 44.

[0032] Two adjacent first positioning posts 314 and two adjacent second positioning posts 315 which are respectively adjacent to the two adjacent first positioning posts enclose a capacitor positioning space. A connecting line of one first positioning post 314 and one second positioning post 315 adjacent thereto passes through an axis of the mounting shell 31. The multiple first positioning posts 314 and the multiple second positioning posts 315 are radially arranged. One capacitor 45 is located in the capacitor positioning space formed by the two first positioning posts 314 and the adjacent two second positioning posts 315 which are respectively adjacent to the two adjacent first positioning posts.

[0033] The mounting shell 31 is provided with three connection and fixing platforms 317, which are located on a top of the inner ring wall 312 and located in the third collision avoidance hole 3121. The three connection and fixing platforms 317 are evenly arranged along a circumferential direction of the third collision avoidance hole 3121. A receiving step 316 is provided at an outer side of each connection and fixing platform 317 away from the axis of the mounting shell 31, for receiving the positive electrode connection plate 41 and fitting with a supporting platform 418. Each connection and fixing platform 317 is provided with a positive electrode connection position 319 and a negative electrode connection position 318. The positive electrode connection position 319 and the negative electrode connection position 318 are respectively provided with connection nuts, and the two connection nuts are arranged side by side. A fixing hole 3171 is provided beside the positive electrode connection position 319 or beside the negative electrode connection position 318 on each connection and fixing platform 317.

[0034] A top of the outer ring wall 311 of the mounting shell 31 is provided with an outer flange 3111 protruding outward in a radial direction of the outer ring wall 311. The outer flange 3111 is annular. A bearing step 3112 is provided between the outer flange 3111 and the outer ring wall 311. The bearing step 3112 is configured to receive the positive electrode connection plate 41, and multiple bumps 3113 are provided on an upper surface of the bearing step 3112.

[0035] The positive electrode connection plate 41 is a bottomed cylinder. The positive electrode connection plate 41 is entirely made of a metal. The positive electrode connection plate 41 is provided with a first collision avoidance hole 410 at a center thereof. An inner ring wall 413 is provided at an outer circumference of the first collision avoidance hole 410 of the positive electrode connection plate 41. The positive electrode connection plate 41 is provided with an outer ring wall 412 surrounding the inner ring wall 413. A bottom ring wall 414 is provided between the inner ring wall 413 and the outer ring wall 412 of the positive electrode connection plate 41. The bottom ring wall 414 is connected between the inner ring wall 413 and the outer ring wall 412. The bottom ring wall 414, the outer ring wall 412 and the inner ring wall 413 enclose an annular device accommodating space. The device accommodating space is configured to accommodate the multiple capacitors 45 such that the multiple capacitors 45 are distributed circumferentially, and the positive electrode connection plate 41 is configured in the shape of an annular pot. An outer edge of the outer ring wall 412 of the positive electrode connection plate 41 is provided with a radially extending flange 4121. The flange 4121 is provided along a circumferential direction of the outer ring wall 412. Multiple positive electrode pins 411 are circumferentially arranged on the flange 4121. The positive electrode pins 411 extend along the axial direction of the housing 1. A limiting groove 4122 is provided between two adjacent positive electrode pins 411 on the flange 4121. Multiple limiting grooves 4122 are evenly distributed along the circumferential direction. The bottom ring wall 414 is provided with multiple first electrical contacts 415, and the multiple first electrical contacts 415 are distributed circumferentially. The first electrical contacts are formed by grooving in the bottom ring wall 414. The first electrical contacts 415 are connected with positive electrodes of the capacitors 45. The bottom ring wall 414 is further provided with multiple run-through first positioning holes 416 and multiple run-through second positioning holes 417. The multiple first positioning holes 416 are circumferentially evenly distributed, and the multiple second positioning holes 417 are also circumferentially evenly distributed. The multiple first positioning holes 416 are located at an inner side of the first electrical contacts 415, and the multiple second positioning holes 417 are located outside the first electrical contacts 415. The first positioning posts 314 pass through the first positioning holes 416, and the second positioning posts 315 pass through the second positioning holes 417.

[0036] An end portion of the inner ring wall 413 closer to the negative electrode connection plate 42 is provided with supporting platforms 418, and the supporting platforms 418 are configured to receive the negative electrode connection plate 42. An inner edge of the supporting platform 418 of the positive electrode connection plate 41 is provided with positive electrode connection terminals 419. The positive electrode connection terminals 419 are bent. The positive electrode connection terminals 419 extend axially and then radially. The positive electrode connection terminals 419 each are provided with a connection hole that is located in the first collision avoidance hole 410.

[0037] The negative electrode connection plate 42 is a circular metal plate. An outer edge of the negative electrode connection plate 42 is provided with multiple negative electrode pins 421 in a circumferential direction of the negative electrode connection plate. The multiple negative electrode pins 421 extend axially. The outer edge of the negative electrode connection plate 42 is further provided with multiple first pin collision avoidance grooves 422. The multiple first pin collision avoidance grooves 422 are circumferentially evenly arranged. One first pin collision avoidance groove 422 is provided between two adjacent negative electrode pins 421, such that the negative electrode pins 421 and the first pin collision avoidance grooves 422 are alternately distributed. The negative electrode connection plate 42 is provided with multiple second electrical contacts 425. The multiple second electrical contacts 425 are circumferentially distributed. The second electrical contacts 425 are formed by grooves in the negative electrode connection plate 42. The second electrical contacts 425 are connected with negative electrodes of the capacitors 45. The negative electrode connection plate 42 is further provided with multiple run-through first positioning holes 424 and multiple run-through second positioning holes 423. The multiple first positioning holes 424 are circumferentially evenly distributed, and the multiple second positioning holes 423 are also circumferentially evenly distributed. The multiple first positioning holes 424 are located at an inner side of the second electrical contacts 425, and the multiple second positioning holes 423 are located outside the second electrical contacts 425. The first positioning posts 314 pass through the first positioning holes 424, and the second positioning posts 315 pass through the second positioning holes 423. The negative electrode connection plate 42 is provided with a second collision avoidance hole 426 at a center thereof. The first collision avoidance hole 410 communicates with the second collision avoidance hole 426. An inner edge of the second collision avoidance hole 426 of the negative electrode connection plate 42 is provided with negative electrode connection terminals 427. The negative electrode connection terminals 427 are bent. The negative electrode connection terminals 427 extend axially and then radially. The negative electrode connection terminals 427 each are provided with a connection hole that is located in the second collision avoidance hole 426.

[0038] When the laminated busbar assembly 4, the multiple capacitors 45 and the mounting shell 31 are assembled, the positive electrode connection plate 41 is mounted in the mounting shell 31, and the multiple capacitors 45 are mounted to the positive electrode connection plate 41. The negative electrode connection plate 42 is provided on the positive electrode connection plate 41, and then the device accommodating space and the capacitors 45 are covered. The negative electrode connection plate 42 is supported by the bearing step 3112, and the bumps 3113 fit with the limiting grooves 4122 for position limiting. The capacitors 45 are connected between the positive electrode connection plate 41 and the negative electrode connection plate 42. The main circuit board 43 is provided with connection holes corresponding to the positions of the first positioning posts 314 and the second positioning posts 315. The laminated connection is achieved by screws. That is, the main circuit board 43, the negative electrode connection plate 42, the capacitors 45 and the positive electrode connection plate 41 are sequentially laminated and connected. An insulating layer may be provided between the negative electrode connection plate 42 and the positive electrode connection plate 41. Of course, the lamination positions of the negative electrode connection plate and the positive electrode connection plate are adjustable. For example, the pot-shaped connection plate may also be the negative electrode connection plate, and the positive electrode connection plate is provided on the pot-shaped negative electrode connection plate. That is, in the above embodiment, the electric polarities of the positive electrode connection plate 41 and the negative electrode connection plate 42 are reversed.

[0039] In addition, the first collision avoidance hole 410, the second collision avoidance hole 426 and the third collision avoidance hole 3121 overlap and communicate with each other. Projection planes of the connection and fixing tables 317, the three positive electrode connection terminals 419, and the three negative electrode connection terminals 427, which are perpendicular to the axial direction, are located inside a projection plane of the second collision avoidance hole 426 or the third collision avoidance hole 3121 perpendicular to the axial direction. The positive electrode connection terminals 419 are located on the positive electrode connection positions 319 and may be connected with the positive electrode connection positions 319 by screws. The negative electrode connection terminals 427 are located on the negative electrode connection positions 318 and may be connected with the negative electrode connection positions318 by screws. The positive electrode connection terminals 419 and the negative electrode connection terminals 427 are distributed circumferentially in sequence. The bent positive electrode connection terminals 419 fit with the inner edge of the second collision avoidance hole 426 and the connection and fixing platforms 317, for position limiting. The negative electrode connection positions 318 fit with the connection and fixing platforms 317, for position limiting. The fixing holes 3171 at one side of the respective negative electrode connection positions 318 are fixedly connected with the main circuit board.

[0040] Referring to FIGS. 8 and 9 in combination with 7 and 10, the three positive electrode connection terminals 419 and the three negative electrode connection terminals 427 are located on a same radial plane.

[0041] In the prior art, the rear end in an axial direction of the motor is generally provided with a fixing structure or a heat dissipation structure, which is generally implemented by multiple cylindrical structures. The present disclosure utilizes the space at the rear end in the axial direction, and arranges components such as the motor controller, the capacitors and the power transistors in the controller mounting chamber at the rear end in the axial direction. The present disclosure optimizes the connection structure of the rear end in the axial direction through the circuit arrangement of the laminated busbar, etc. In this way, the present disclosure reduces the overall occupied space of the circuit devices and effectively utilizes the space at the rear end in the axial direction. In addition, compared to the existing motor assembly, the present disclosure maintains the axial dimension of the drive assembly, and also maintains the radial dimension of the drive assembly in the vertical direction by optimized connection through the connecting hole. Overall, the present disclosure enables a highly integrated drive assembly.Embodiment of Vehicle:

[0042] The vehicle includes the drive assembly as described above. The drive assembly may be integrated with or without a transmission. The vehicle may be a new energy electric car, a new energy electric bus, a new energy electric truck, a new energy electric cleaning vehicle, a new energy electric rail vehicle, a new energy electric flying vehicle, a new energy electric shipping vehicle, etc.

[0043] It can be seen from the above that, by utilizing the space at the rear end in the axial direction of the motor, through the arrangement of the partition wall and the bearing, the rotor is rotatably provided in the motor mounting chamber, and the motor controller is provided in the controller mounting chamber. The motor controller is provided at the rear end in an axial direction of the motor, which effectively reduces the occupied space, improves the space utilization, and realizes the high integration of the drive assembly. The bearing is stably provided in the mounting ring wall, which improves the operational stability of the motor.

[0044] The positive electrode connection plate is a bottomed cylinder, which accommodates the multiple capacitors and realizes effective positioning of the capacitors. In addition, the negative electrode connection plate plays the role of covering and positioning, which provides desired support for the stable connection of the capacitors. The main circuit board, the negative electrode connection plate, the multiple capacitors and the positive electrode connection plate are laminated in sequence. The laminated structure reduces the axial dimension and achieves the compact purpose, and the laminated structure is simple and is easy for assembly, improving assembly efficiency. The first collision avoidance hole is used for mounting, positioning and placement of terminals. The annular device accommodating space is used to hold the multiple capacitors, such that the multiple capacitors are distributed circumferentially and well supported and positioned. The axially arranged electrical contacts are respectively electrically connected with the two ends of the capacitor to ensure the electrical connection stability. The negative electrode connection plate is stably provided on the supporting platform, and the positive electrode connection terminals and the negative electrode connection terminals are located in the second collision avoidance hole. This design realizes the centralized arrangement of terminals, optimizes the layout, and improves the connection efficiency. The mounting shell and the positioning post assembly provide stable support and fixation for the main circuit board, the positive electrode connection plate, the negative electrode connection plate, and even the motor controller. The third collision avoidance hole of the mounting shell is used for assembly and positioning of other equipment. The connection and fixing platforms provide stable support for the connection of the positive electrode and negative electrode. The positioning posts provide support and positioning for the main circuit board, the positive electrode connection plate and the negative electrode connection plate. A capacitor positioning space is formed by four positioning posts, which provides stable support for the connection of the capacitors and ensures the stability of the motor controller. The radial arrangement of the first positioning posts and the second positioning posts is adapted to the arrangement direction of the capacitors which are arranged circumferentially, thereby further positioning the capacitors and improving the stability of the capacitors.

[0045] The laminated arrangement improves the compactness of the structural arrangement. In order to solve the interference problem caused by the laminated arrangement, collision avoidance recesses are provided. Through the reasonable structural arrangement, the positive electrode connecting plate and the negative electrode connecting plate are laminated without interfering with each other. The insulation design of the connecting sleeve improves the protection and safety of the connecting plate. The outlet direction of the positive electrode connecting plate and the negative electrode connecting plate is designed based on the mounting orientation of the drive assembly. In order to shorten the vertical dimension such that the vehicle has more vertical space at the drive assembly, the connecting holes are located between the top portion and the bottom portion of the housing, and the positive electrode connecting plate and the negative electrode connecting plate are inclined to the vertical direction.Industrial Applicability

[0046] The laminated busbar assembly, the motor controller, the drive assembly and the vehicle of the present disclosure are suitable for the field of new energy. The present disclosure utilizes the space at the rear end in the axial direction of the motor, and through the arrangement of the partition wall and the bearing, the rotor is rotatably provided in the motor mounting chamber, while the motor controller is provided in the controller mounting chamber. By laminating the busbar and the devices, the present disclosure effectively reduces the occupied space, improves the space utilization, and realizes high integration.

Claims

1. A motor controller (3), wherein the motor controller (3) comprises a laminated busbar assembly (4) and multiple capacitors (45), wherein the laminated busbar assembly (4) comprises a main circuit board (43), a positive electrode connection plate (41), and a negative electrode connection plate (42); the positive electrode connection plate (41) is a bottomed cylinder, which encloses a device accommodating space; an outer edge of the positive electrode connection plate (41) is circumferentially provided with multiple positive electrode pins (411); the negative electrode connection plate (42) is circular, and an outer edge thereof is circumferentially provided with multiple negative electrode pins (421); and the negative electrode connection plate (42) covers the device accommodating space; the main circuit board (43), the negative electrode connection plate (42), and the positive electrode connection plate (41) are laminated in sequence along an axial direction of the motor controller (3); and the multiple positive electrode pins (411) and the multiple negative electrode pins (421) pass through the main circuit board (43) and are electrically connected with the main circuit board (43); and the multiple capacitors (45) are provided in the device accommodating space, and are connected between the positive electrode connection plate (41) and the negative electrode connection plate (42).

2. The motor controller (3) according to claim 1, wherein the positive electrode connection plate (41) is provided with a first collision avoidance hole (410) at a center thereof, an inner ring wall (413) at an outer circumference of the first collision avoidance hole (410), an outer ring wall (412) surrounding an outer circumference of the inner ring wall (413), and a bottom ring wall (414) located and connected between the inner ring wall (413) and the outer ring wall (412) of the positive electrode connection plate (41); and the inner ring wall (413), the outer ring wall (412) and the bottom ring wall (414) enclose the device accommodating space, in which the multiple capacitors (45) are distributed circumferentially.

3. The motor controller (3) according to claim 2, wherein the bottom ring wall (414) is provided with multiple first electrical contacts (415), which are circumferentially distributed, and are connected with positive electrodes of the capacitors (45), respectively; and the negative electrode connection plate (42) is provided with multiple second electrical contacts (425), which are circumferentially distributed, and are connected with negative electrodes of the capacitors (45), respectively.

4. The motor controller (3) according to claim 2, wherein a center of the negative electrode connection plate (42) is provided with a second collision avoidance hole (426) and an inner edge of the negative electrode connection plate (42) is provided with negative electrode connection terminals (427); and the second collision avoidance hole (426) communicates with the first collision avoidance hole (410); and an end portion of the inner ring wall (413) closer to the negative electrode connection plate (42) is provided with supporting platforms (418); an inner edge of the positive electrode connection plate (41) is provided with positive electrode connection terminals (419); the negative electrode connection plate (42) is adjacent to the supporting platforms (418); and projection planes of the positive electrode connection terminals (419) and the negative electrode connection terminals (427) perpendicular to the axial direction are located inside a projection plane of the second collision avoidance hole (426) perpendicular to the axial direction.

5. The motor controller (3) according to any one of claims 1 to 4, wherein the motor controller (3) further comprises a mounting shell (31); the mounting shell (31) is a bottomed cylinder, a bottom (313) of which is provided with a positioning post assembly extending along the axial direction; the mounting shell (31) encloses a mounting and accommodating space in which the positive electrode connection plate (41), the negative electrode connection plate (42), and the multiple capacitors (45) are provided; the main circuit board (43) covers the mounting and accommodating space; and the positioning post assembly passes through the positive electrode connection plate (41) and the negative electrode connection plate (42), and fits with the main circuit board (43) for position limiting.

6. The motor controller (3) according to claim 5, wherein the mounting shell (31) is provided with a third collision avoidance hole (3121) at a center thereof and connection and fixing platforms (317) in the third collision avoidance hole (3121); and the connection and fixing platforms (317) each are provided with a positive electrode connection position (319) and a negative electrode connection position (318).

7. The motor controller (3) according to claim 5, wherein the positioning post assembly comprises multiple first positioning posts (314) and multiple second positioning posts (315); the multiple first positioning posts (314) are distributed circumferentially; the multiple second positioning posts (315) are distributed circumferentially, and are located outside the multiple first positioning posts (314); and the multiple first positioning posts (314) and the multiple second positioning posts (315) pass through the positive electrode connection plate (41) and the negative electrode connection plate (42); and two adjacent first positioning posts (314) and two adjacent second positioning posts (315) which are respectively adjacent to the two adjacent first positioning posts (314) enclose a capacitor positioning space in which one capacitor (45) is located.

8. The motor controller (3) according to claim 7, wherein a connecting line of one first positioning post (314) and one second positioning post (315) adjacent thereto passes through an axis of the mounting shell (31).

9. A drive assembly, comprising the motor controller (3) according to any one of claims 1 to 8.

10. A vehicle, comprising the drive assembly according to claim 9.