Laminated busbar assembly, motor control, drive assembly and vehicle

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of new energy, and in particular to a laminated busbar assembly, 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 FR3044837A1 disclosed an electrical connector intended to be electrically connected to at least a first electronic unit and to a source of electrical energy, the electrical connector comprising: at least one first trace of power to be electrically connected to a pole of positive polarity of the electric power source, and at least a second power trace to be electrically connected to a pole of negative polarity of the electric power source, wherein the at least first and second power traces are overmolded at least in part of electrically insulating material, the electrical connector comprising a substantially flat portion, and comprising: at least one through hole for receiving at least one electrical connection member of the at least one first electronic unit with at least one second electronic unit.

[0007] Application with publication number of US2018 / 153032A1 disclosed a semiconductor device of the present invention includes: a substrate that is annular or partially annular; a first phase control circuit provided on the substrate, the first phase control circuit being configured to control a first phase of a plurality of phases of a motor; a second phase control circuit provided on the substrate so as to be adjacent to the first phase control circuit in a circumferential direction of the substrate, the second phase control circuit being configured to control a second phase of the plurality of phases of the motor, the second phase being different from the first phase; a power supply wiring disposed on one of an outer circumferential side and an inner circumferential side of the first phase control circuit and the second phase control circuit in a radial direction of the substrate, the power supply wiring being connected to the first phase control circuit and the second phase control circuit, and the power supply wiring extending in the circumferential direction of the substrate; and a ground winding disposed on an other one of the outer circumferential side and the inner circumferential side of the first phase control circuit and the second phase control circuit in the radial direction of the substrate, the ground winding being connected to the first phase control circuit and the second phase control circuit, and the ground winding extending in the circumferential direction of the substrate.SUMMARY Technical objectives

[0008] A first objective of the present disclosure is to provide a laminated busbar assembly featuring high assembly efficiency and a compact structure.

[0009] A second objective of the present disclosure is to provide a motor controller provided with the above laminated busbar assembly.

[0010] A third objective of the present disclosure is to provide a drive assembly provided with the above motor controller.

[0011] A fourth objective of the present disclosure is to provide a vehicle provided with the above drive assembly.Technical Solutions

[0012] In order to achieve the first objective of the present disclosure, the present disclosure provides a laminated busbar assembly. The laminated busbar assembly includes a main circuit board, a positive electrode connection plate, a negative electrode connection plate, and a three-phase connection plate assembly, wherein the main circuit board, the positive electrode connection plate, and the negative electrode connection plate each are circular; an outer edge of the positive electrode connection plate is circumferentially provided with multiple positive electrode pins, and an outer edge of the negative electrode connection plate is circumferentially provided with multiple negative electrode pins; the three-phase connection plate assembly includes three single-phase connection plates, which are fan-shaped or arcuate; an outer edge of each single-phase connection plate is provided with multiple single-phase pins in a circumferential direction of each single-phase connection plate; the main circuit board, the three-phase connection plate assembly, the negative electrode connection plate, and the positive electrode connection plate are laminated along an axial direction of the positive electrode connection plate; the three single-phase connection plates are coplanar; and the multiple positive electrode pins, the multiple negative electrode pins, and the multiple single-phase pins pass through the main circuit board and are electrically connected with the main circuit board.

[0013] Further, the multiple positive electrode pins, the multiple negative electrode pins, and the multiple single-phase pins may be arranged along a same circumferential direction.

[0014] Further, the outer edge of the negative electrode connection plate may be provided with first pin collision avoidance grooves, and the outer edge of each single-phase connection plate may be provided with second pin collision avoidance grooves; and the positive electrode pins may pass through the first pin collision avoidance grooves and the second pin collision avoidance grooves, and the negative electrode pins may pass through the second pin collision avoidance grooves.

[0015] Further, two adjacent single-phase pins may form a single-phase bridge arm pin group; and one single-phase bridge arm pin group, one positive electrode pin, and one negative electrode pin may be cyclically arranged in a circumferential direction of the laminated busbar assembly in sequence.

[0016] Further, a center of the positive electrode connection plate may be provided with a first collision avoidance hole and an inner edge of the positive electrode connection plate may be provided with positive electrode connection terminals; 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 three single-phase connection plates may be each arcuate, and an inner edge of each of the three single-phase connection plates is provided with a single-phase connection terminal; the first collision avoidance hole may communicate with the second collision avoidance hole; projection planes of the positive electrode connection terminals, the negative electrode connection terminals, and the three single-phase connection terminals, which are perpendicular to an axial direction of the laminated busbar assembly, may be located inside a projection plane of the second collision avoidance hole which is perpendicular to the axial direction.

[0017] In order to achieve the second objective of the present disclosure, the present disclosure provides a motor controller provided with the above laminated busbar assembly.

[0018] Further, the motor controller may include multiple power transistors soldered at an outer circumference of the main circuit board; and the multiple power transistors may be distributed along a circumferential direction and may be located outside the three-phase connection plate assembly, the negative electrode connection plate, and the positive electrode connection plate along a radial direction thereof.

[0019] In order to achieve the third objective of the present disclosure, the present disclosure provides a motor controller provided with the above drive assembly.

[0020] Further, the drive assembly may include a housing, a bearing, a rotor, and a stator, wherein the housing may be cylindrical, and may be provided therein with a chamber along an axial direction of the housing; an inner wall of the housing may be provided with a partition wall along a radial direction of the housing, the partition wall divides the chamber into a motor mounting chamber and a controller mounting chamber; the bearing may be provided on the partition wall; the rotor may be provided in the motor mounting chamber, and may be connected with the bearing; the stator may be provided in the motor mounting chamber, and may be located outside the rotor; the motor controller may be provided in the controller mounting chamber; and the drive assembly further may include three single-phase terminals, which may pass through the partition wall and may be connected between the motor controller and the stator.

[0021] In order to achieve the fourth 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

[0022] The cylindrical housing enables full use of the space at the rear end in an axial direction of the motor, such that the rotor is rotatably provided in the motor mounting chamber, and the motor controller is provided in the controller mounting chamber. This design effectively reduces the occupied space, improves the space utilization, and realizes the high integration of the drive assembly.

[0023] 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. Three single-phase terminals pass through the partition wall and are connected between the motor controller and the stator. The projection planes of the three single-phase terminals perpendicular to the axial direction are located between the projection plane of the bearing perpendicular to the axial direction and the projection plane of the stator perpendicular to the axial direction. When the terminals of the stator and the single-phase terminals are connected, that is, when the rotor is not mounted, an operating space is reserved between the bearing and the stator. This facilitates the connection of the terminals of the stator and the single-phase terminals. 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.

[0024] The main circuit board, the positive electrode connection plate, and the negative electrode connection plate are each configured in a circle, and the three single-phase connection plates are each configured in a fan or arcuate shape. The three single-phase connection plates are coplanar and form a circle-like outline. The positive electrode connection plate, the negative electrode connection plate and the three single-phase connection plates are laminated, and are electrically connected with the main circuit board through pins at their respective outer edges, so as to realize the corresponding circuit connection. The laminated structure reduces the axial dimension and achieves a compact purpose, and the laminated structure is simple and is easy for assembly, improving assembly efficiency.

[0025] The arrangement of the pins in the same circumferential direction optimizes the wiring layout and a circuit layout of the main circuit board.

[0026] The collision avoidance grooves make it easy for the pins to be arranged in the same circumferential direction, and can achieve the corresponding limiting purpose.

[0027] One single-phase bridge arm pin group, one positive electrode pin, and one negative electrode pin constitute one single-phase bridge arm. The multiple bridge arms are arranged in an orderly manner in the circumferential direction of the main circuit board, and the power transistors operate in a time-sharing manner during inverter driving, so the power transistors can also be distributed at intervals by using UVW in the circumferential direction. Therefore, the distributed arrangement realizes time-sharing heat conduction at different positions, thereby further improving the heat conduction efficiency.

[0028] The collision avoidance holes are centrally provided, and the arcuate single-phase connection plates in a circle form a connecting space at a center. Thus, the projection planes of the positive electrode connection terminals, the negative electrode connection terminals, and the three single-phase 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, negative electrode connection terminals and single-phase connection terminals are centrally arranged, which is convenient for connection, and the pins are arranged circumferentially, which effectively optimizes the circuit wiring layout.

[0029] The connection terminals are arranged centrally, the pins are arranged circumferentially, and the power transistors are located at the outer circumference of the main circuit board. Thus, the pins of the power transistors are located at the circumference of the positive electrode and negative electrode pins and the single-phase pins, such that the main circuit board has more central space for the driving circuit layout, thereby effectively optimizing the circuit wiring layout.

[0030] 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.

[0031] The laminated structure of the circuit boards reduces the axial dimension and achieves the compact purpose, and the laminated structure is simple and is easy for assembly, improving assembly efficiency.BRIEF DESCRIPTION OF THE DRAWINGS Description of drawings

[0032] 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 a housing of the drive assembly showing a motor mounting chamber according to an embodiment of the drive assembly of the present disclosure; FIG. 5 is a structural view of a housing of the drive assembly showing a controller mounting chamber according to the embodiment of the drive assembly of the present disclosure; FIG. 6 is an exploded view of the three-phase terminal block according to the embodiment of the drive assembly of the present disclosure; FIG. 7 is an axial sectional view of the drive assembly at the three-phase terminal block according to the embodiment of the drive assembly of the present disclosure; FIG. 8 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. 9 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. 10 is an exploded view of power transistor related devices according to the embodiment of the drive assembly of the present disclosure; FIG. 11 is an axial sectional view of the drive assembly at a power transistor according to the embodiment of the drive assembly of the present disclosure; FIG. 12 is an exploded view of a laminated busbar assembly according to the embodiment of the drive assembly of the present disclosure; FIG. 13 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. 14 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. 15 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. 16 is an axial sectional view of the drive assembly according to the embodiment of the drive assembly of the present disclosure.

[0033] 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:

[0034] 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. Referring to FIGS. 4, 5 and 7, the housing 1 is cylindrical, and the housing 1 is provided therein with a chamber along an axial direction of the housing 1. An inner wall of the housing 1 is provided with a partition wall 11 along a radial direction of the housing, and the partition wall 11 divides the chamber into a motor mounting chamber 121 and a controller mounting chamber 122. The partition wall 11 is provided with a mounting hole 111 at a center thereof along the axial direction of the housing 1, and the partition wall 11 is provided with a mounting ring wall 112 extending toward the motor mounting chamber 121 at an outer circumference of the mounting hole 111. The mounting ring wall 112 and the partition wall 11 form a mounting step within the mounting ring wall 112. The bearing 17 (its structure not specifically shown) is provided inside the mounting ring wall 112. Three connecting holes 113 and three inserting holes 114 penetrate through the partition wall 11. The partition wall 11 is provided with three second collision avoidance grooves 115 on a first end wall facing the motor mounting chamber 121. The respective second collision avoidance grooves 115 extend from the respective connecting holes 113 toward an inner wall of the housing 1 and the stator 15.

[0035] Referring to FIG. 6 and FIG. 7, a three-phase terminal block 2 includes a terminal block body 21 and three single-phase terminals 22.

[0036] The single-phase terminals 22 each extend axially, and each of the single-phase terminals 22 includes a connecting portion 221, a first terminal portion 222 and a second terminal portion 223.

[0037] When the three-phase terminal block 2 is provided on the partition wall 11, the three first terminal portions 222 pass through the connecting holes 113 respectively.

[0038] The three single-phase terminals 22 are connected between the motor controller 3 and the stator 15. On a projection plane of the bearing 17 perpendicular to the axial direction, the projection plane of the three single-phase terminals 22, the three connecting holes 113, and the three inserting holes 114, which are perpendicular to the axial direction, are located between the projection plane of the bearing 17 perpendicular to the axial direction and a projection plane of the stator 15 perpendicular to the axial direction.

[0039] The stator 15 is provided with a winding, which is provided with leads and terminals. The terminals of the stator are located in the second collision avoidance grooves 115 and connected with the first terminal portions 222.

[0040] Referring to FIGS. 8 and 9, the three-phase terminal block 2 is provided in a center of the motor controller 3. 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.

[0041] Referring to FIGS. 10, 11, and 5, the motor controller 3 is provided in the controller mounting chamber 122.

[0042] Referring to FIGS. 12 and 13, 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. 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.

[0043] 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.

[0044] 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 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.

[0045] The three-phase connection plate assembly 44 includes three single-phase connection plates 441. The three single-phase connection plates 441 each are arcuate metal plates, and of course they may also be arranged in a fan shape. An outer edge of each of the single-phase connection plate 441 is provided with multiple single-phase pins 442 in a circumferential direction of the each of the single-phase connection plate. The multiple single-phase pins 442 extend axially. The outer edge of each of the single-phase connection plates 441 is further provided with second pin collision avoidance grooves. The second pin collision avoidance grooves include positive electrode collision avoidance grooves 443 and negative electrode collision avoidance grooves 444. Two single-phase pins 442, one positive electrode collision avoidance groove 443 and one negative electrode collision avoidance groove 444 are circumferentially arranged in sequence. An inner edge of each of the single-phase connection plates 441 is provided with a single-phase connection terminal 445. The single-phase connection terminal 445 is provided with a connection hole. The three single-phase connection plates 441 are coplanar, so their outer edges form a circle-like outline, and their inner edges enclose a connection space.

[0046] When the laminated busbar assembly 4 is assembled, the negative electrode connection plate 42 is provided on the positive electrode connection plate 41, and then the three single-phase connection plates 441 are placed on the negative electrode connection plate 42. Referring to FIGS. 14 and 15, the main circuit board 43 is mounted on the three single-phase connection plates 441. That is, the main circuit board 43, the three-phase connection plate assembly 44, the negative electrode connection plate 42, the capacitors 45 and the positive electrode connection plate 41 are sequentially laminated and connected. Three insulating layers are provided between the three-phase connection plate assembly 44 and the negative electrode connection plate 42, and the shapes of the three insulating layers are matched with the single-phase connection plates. An insulating layer may also be provided between the negative electrode connection plate 42 and the positive electrode connection plate 41, and an insulating layer may also be provided between the main circuit board 43 and the three-phase connection plate assembly 44. The positive electrode pins 411 pass through the first pin collision avoidance grooves 422 and the positive electrode collision avoidance grooves 443 and are connected to a pad of the main circuit board 43. The negative electrode pins 421 pass through the negative electrode collision avoidance grooves 444 and are connected to the pad of the main circuit board 43. The single-phase pins 442 pass through the main circuit board 43 and are connected to the pad of the main circuit board 43. The multiple positive electrode pins 411, the multiple negative electrode pins 421 and the multiple single-phase pins 442 are arranged along a same circumferential direction. Of course, a positive electrode collision avoidance groove 443 and a negative electrode collision avoidance groove 444 may also form an integrated second pin collision avoidance groove, such that the positive electrode pins pass through the first pin collision avoidance grooves and the second pin collision avoidance grooves, and the negative electrode pins pass through the second pin collision avoidance grooves. Of course, the lamination positions of the three-phase connection plate assembly, 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.

[0047] In addition, the first collision avoidance hole 410 and the second collision avoidance hole 426 overlap and communicate with each other. Projection planes of the three positive electrode connection terminals 419, the three negative electrode connection terminals 427, and the three single-phase connection terminals 445, which are perpendicular to the axial direction, are located inside a projection plane of the second collision avoidance hole 426 perpendicular to the axial direction.

[0048] Referring to FIGS. 14 and 15 in combination with 13 and 16, The multiple power transistors 34 are provided at an outer circumference of the main circuit board 43 and are electrically connected with the main circuit board 43 at the second soldering position 434. The multiple power transistors 34 are evenly distributed along the same circumferential direction of the main circuit board 43. The multiple power transistors 34 are circumferentially arranged and located outside the three-phase connection plate assembly 44, the negative electrode connection plate 42, and the positive electrode connection plate 41 along a radial direction thereof.

[0049] The multiple positive electrode pins 411, the multiple negative electrode pins 421 and the multiple single-phase pins 442 are arranged along the circumferential direction of the main circuit board 43. Two adjacent single-phase pins 442 form a single-phase bridge arm pin group. One single-phase bridge arm pin group, one positive electrode pin 411, and one negative electrode pin 421 are cyclically arranged in a circumferential direction of the laminated busbar assembly in sequence.

[0050] 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, the terminal block and the annular arrangement of the power transistors, 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:

[0051] 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.

[0052] 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. Three single-phase terminals pass through the partition wall and are connected between the motor controller and the stator. The projection planes of the three single-phase terminals perpendicular to the axial direction are located between the projection plane of the bearing perpendicular to the axial direction and the projection plane of the stator perpendicular to the axial direction. When the terminals of the stator and the single-phase terminals are connected, that is, when the rotor is not mounted, an operating space is reserved between the bearing and the stator. This facilitates the connection of the terminals of the stator and the single-phase terminals. 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.

[0053] In addition, considering that the stator has a three-phase winding, the three single-phase terminals are arranged at the outer circumference of the terminal block body to connect the terminals of the stator correspondingly, thereby optimizing the wiring layout. In addition, the space formed by the three single-phase terminals can accommodate components such as the bearing, thereby improving the compactness of the structure layout.

[0054] The three single-phase connection plates are coplanar and form a circle-like outline. The positive electrode connection plate, the negative electrode connection plate and the three single-phase connection plates are laminated, and are electrically connected with the main circuit board through the pins at their respective outer edges, so as to realize the corresponding circuit connection. The laminated structure reduces the axial dimension and achieves a compact purpose, and the laminated structure is simple and is easy for assembly, thereby improving assembly efficiency. The arrangement of the pins in the same circumferential direction optimizes the wiring layout and the circuit layout of the main circuit board. The collision avoidance grooves make it easy for the pins to be arranged in the same circumferential direction, and can achieve the corresponding limiting purpose. The collision avoidance holes are centrally provided, and the arcuate single-phase connection plates in a circle form a connecting space at a center. Thus, the projection planes of the positive electrode connection terminals, the negative electrode connection terminals, and the three single-phase 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, negative electrode connection terminals and single-phase connection terminals are centrally arranged, which is convenient for connection, and the pins are arranged circumferentially, which effectively optimizes the circuit wiring layout.

[0055] 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.Industrial Applicability

[0056] 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 laminated busbar assembly (4), comprising: a circular main circuit board (43); a circular positive electrode connection plate (41), an outer edge thereof being circumferentially provided with multiple positive electrode pins (411); a circular negative electrode connection plate (42), an outer edge thereof being circumferentially provided with multiple negative electrode pins (421); and a three-phase connection plate assembly (44), comprising three single-phase connection plates (441), which are fan-shaped or arcuate, and an outer edge of each of the three single-phase connection plates (441) is provided with multiple single-phase pins (442) in a circumferential direction of the each of the three single-phase connection plates (441); and wherein, the main circuit board (43), the three-phase connection plate assembly (44), the negative electrode connection plate (42), and the positive electrode connection plate (41) are laminated along a direction perpendicular to a plane of the positive electrode connection plate (41); the three single-phase connection plates (441) are coplanar; and the multiple positive electrode pins (411), the multiple negative electrode pins (421), and the multiple single-phase pins (442) pass through the main circuit board (43) and are electrically connected with the main circuit board (43).

2. The laminated busbar assembly (4) according to claim 1, wherein the multiple positive electrode pins (411), the multiple negative electrode pins (421) and the multiple single-phase pins (442) are arranged along a same circumferential direction.

3. The laminated busbar assembly (4) according to claim 2, wherein the outer edge of the negative electrode connection plate (42) is provided with first pin collision avoidance grooves (422), and the outer edge of each of the single-phase connection plates (441) is provided with second pin collision avoidance grooves; and the positive electrode pins (411) pass through the first pin collision avoidance grooves (422) and the second pin collision avoidance grooves, and the negative electrode pins (421) pass through the second pin collision avoidance grooves.

4. The laminated busbar assembly (4) according to claim 2, wherein two adjacent single-phase pins (442) form a single-phase bridge arm pin group; and one single-phase bridge arm pin group, one positive electrode pin (411), and one negative electrode pin (421) are cyclically arranged in a circumferential direction of the laminated busbar assembly (4) in sequence.

5. The laminated busbar assembly (4) according to any one of claims 1 to 4, wherein a center of the positive electrode connection plate (41) is provided with a first collision avoidance hole (410) and an inner edge of the positive electrode connection plate (41) is provided with positive electrode connection terminals (419); 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); the three single-phase connection plates (441) each are arcuate, and an inner edge of each of the three single-phase connection plates (441) is provided with a single-phase connection terminal (445); the first collision avoidance hole (410) communicates with the second collision avoidance hole (426); projection planes of the positive electrode connection terminals (419), the negative electrode connection terminals (427), and the three single-phase connection terminals (445), which are perpendicular to an axial direction of the laminated busbar assembly (4), are located inside a projection plane of the second collision avoidance hole (426) perpendicular to the axial direction; and the projection plane of the second collision avoidance hole (426) is parallel to a plane of the negative electrode connection plate (42).

6. A motor controller (3), comprising the laminated busbar assembly (4) according to any one of claims 1 to 5.

7. The motor controller (3) according to claim 6, wherein the motor controller (3) comprises multiple power transistors (34) soldered at an outer circumference of the main circuit board (43); and the multiple power transistors (34) are distributed circumferentially and are located outside the three-phase connection plate assembly (44), the negative electrode connection plate (42), and the positive electrode connection plate (41) along a radial direction thereof.

8. A drive assembly, comprising the motor controller (3) according to claim 6 or 7.

9. The drive assembly according to claim 8, wherein the drive assembly further comprises a housing (1), a bearing (17), a rotor (16), and a stator (15); the housing (1) is cylindrical, and is provided therein with a chamber along an axial direction of the housing (1); an inner wall of the housing (1) is provided with a partition wall (11) along a radial direction of the housing (1), the partition wall (11) divides the chamber into a motor mounting chamber (121) and a controller mounting chamber (122); the bearing (17) is provided on the partition wall (11); the rotor (16) is provided in the motor mounting chamber (121), and is connected with the bearing (17); the stator (15) is provided in the motor mounting chamber (121), and is located outside the rotor (16); and the motor controller (3) is provided in the controller mounting chamber (122); and the drive assembly further comprises three single-phase terminals (22), which pass through the partition wall (11) and are connected between the motor controller (3) and the stator (15).

10. A vehicle, comprising the drive assembly according to claim 8 or 9.