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EP-4181362-B1 - MOTOR CONTROLLER WITH CAPACITORS SURROUNDED, DRIVE ASSEMBLY AND VEHICLE

EP4181362B1EP 4181362 B1EP4181362 B1EP 4181362B1EP-4181362-B1

Inventors

  • JIANG, GUIBIN
  • LIU, HONGXIN
  • LI, HONGYU
  • WEI, Biao
  • MO, Lixiong

Dates

Publication Date
20260506
Application Date
20201116

Claims (10)

  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.

Description

TECHNICAL FIELD 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 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. 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. 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. 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. 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 A first objective of the present disclosure is to provide a motor controller provided with a laminated busbar assembly laminated stably with capacitors. A second objective of the present disclosure is to provide a drive assembly provided with the above motor controller. A third objective of the present disclosure is to provide a vehicle provided with the above drive assembly. Technical Solutions 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 electri