DRIVE ASSEMBLY WITH ENGINE CONTROL AND VEHICLE SO THAT

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of new energy, and in particular to 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 US20190277290A1 disclosed an electric compressor having an electrical connection unit. The electric compressor may include: a compression unit configured to compress working fluid; an electrically-driven unit configured to drive the compression unit, and including a stator fixed in an inner surface of a housing, and a rotor rotatably disposed inside the stator; the housing including a partition provided to define a space in which the electrically-driven unit is received; a plurality of electrical connection pins connected electrically to the electrically-driven unit, and disposed through the partition in a longitudinal direction of the housing; and a controller disposed on a rear surface of the partition.

[0006] Application with publication number of JP2016217291A disclosed a stator 5c which is inserted into a motor accommodation part 11a is shrink-fit thereto, and a terminal accommodation part 11h of a partitioning wall 11c is arranged inside the stator 5c of a rotating shaft 5a in a radial direction B, and also inside a coil end 5e in an axial direction A. A cluster block 19 is connected to a tip 21b of a hermetic terminal 21 by utilizing a space at the inside of the stator 5c, and a resin-made material is potted to the terminal accommodation part 11h. A compressor case 13 is attached to a motor case 11, a rotor 5b is arranged inside the stator 5c, a circuit board 9a of an inverter circuit 9 is attached to a circuit accommodation part 11b, a base end of the hermetic terminal 21 is connected to a terminal 9c, and the circuit accommodation part 11b is covered with a cap 11g.SUMMARY Technical objectives

[0007] A first objective of the present disclosure is to provide a drive assembly provided with a highly integrated controller at a rear end in an axial direction of the drive assembly.

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

[0009] In order to achieve the first objective of the present disclosure, the present disclosure provides a drive assembly provided with a motor controller at a rear end in an axial direction of the drive assembly. The drive assembly includes a housing, a motor controller, a bearing, a rotor, and a stator, wherein the housing is cylindrical, and is provided therein with a chamber along the axial direction; an inner wall of the housing is 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 is provided on the partition wall; the rotor is provided in the motor mounting chamber, and is connected with the bearing; the stator is provided in the motor mounting chamber, and is located outside the rotor; the motor controller is provided in the controller mounting chamber; the drive assembly further includes three single-phase terminals, which pass through the partition wall and are connected between the motor controller and the stator; projection planes of the three single-phase terminals perpendicular to the axial direction are located between a projection plane of the bearing perpendicular to the axial direction and a projection plane of the stator perpendicular to the axial direction; and the drive assembly includes a three-phase terminal block; the three-phase terminal block includes a terminal block body and three single-phase terminals; the terminal block body is cylindrical; the three single-phase terminals each are arranged along an axial direction of the terminal block body, and are arranged at an outer circumference of the terminal block body; the single-phase terminals each are provided with a first terminal portion and a second terminal portion, which are respectively located on two ends of the terminal block body along an axial direction thereof; and the first terminal portions are connected with the stator, and the second terminal portions are connected with the motor controller.

[0010] Further, the partition wall may be provided with a mounting hole and a mounting ring wall extending toward the motor mounting chamber at an outer circumference of the mounting hole; the bearing may be provided inside the mounting ring wall; and the three single-phase terminals may be located at an outer circumference of the mounting ring wall.

[0011] Further, the three single-phase terminals may be located at an outer circumferential wall of the mounting ring wall; and the outer circumferential wall of the mounting ring wall may be provided with a first collision avoidance groove at each of the three single-phase terminals.

[0012] Further, the partition wall may be provided with three run-through connecting holes and three run-through inserting holes; the three connecting holes and the three inserting holes may be distributed alternately and evenly at intervals along an outer circumference of the bearing; and one single-phase terminal may pass through one connecting hole.

[0013] Further, a first end wall of the partition wall facing the motor mounting chamber may be provided with second collision avoidance grooves, which extends from the respective connecting holes to the stator.

[0014] Further, the drive assembly further may include a chamber cover, which covers the mounting hole.

[0015] Further, a second end wall of the partition wall facing the controller mounting chamber may be provided with fixing holes, and the chamber cover may be located at the second end wall side, and may be connected with the fixing holes.

[0016] Further, an outer wall of the housing may be provided with a liquid cooling channel; the liquid cooling channel may include a motor cooling groove and a controller cooling groove that may communicate with each other; the motor cooling groove may be located on an outer wall of the motor mounting chamber, and the controller cooling groove may be located on an outer wall of the controller mounting chamber; the motor controller may include a circuit board assembly and multiple power transistors; the multiple power transistors may be provided at an outer circumference of the circuit board assembly, and may be electrically connected with the circuit board assembly; and packages of the multiple power transistors may be connected with an inner wall of the controller mounting chamber.

[0017] In order to achieve the second 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

[0018] 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. The multiple power transistors are circumferentially arranged and connected with the inner wall of the controller mounting chamber. The waste heat of the power transistors can be efficiently conducted to the interconnected controller cooling groove and motor cooling groove, realizing integrated liquid cooling and improving heat dissipation efficiency.

[0019] The even distribution facilitates space utilization. The power transistors are turned on by time sharing in actual operation. Therefore, the distributed arrangement realizes time-sharing heat conduction at different positions, thereby further improving the heat conduction efficiency.

[0020] 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.

[0021] The bearing is stably provided in the mounting ring wall, which improves the operational stability of the motor, and the three single-phase terminals are located on the outer circumferential wall of the mounting ring wall, which makes it convenient for the mounting and positioning of the terminals of the stator.

[0022] The first collision avoidance grooves can position the terminals of the stator, and optimize the layout space, thereby improving the connecting easiness and reliability.

[0023] The fixing holes are configured to attach and fix the motor controller. The connecting holes and the fixing holes are located between the bearing and the stator, so that it is easy to disassemble and assemble.

[0024] The second collision avoidance grooves can accommodate the wires and terminals of the stator, thereby optimizing the layout space.

[0025] The chamber cover isolates the two chambers, thereby improving the operational stability.

[0026] The fixing holes located on the second end wall of the partition wall can be used to mount and position the terminal block, such that different devices can be disassembled and assembled from both sides of the partition wall.

[0027] 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.

[0028] The multiple power transistors are circumferentially arranged and connected with the inner wall of the controller mounting chamber. The waste heat of the power transistors can be efficiently conducted to the interconnected controller cooling groove and motor cooling groove, realizing integrated liquid cooling and improving heat dissipation efficiency. Besides, using the inner circumferential wall as a heat conductor can effectively optimize the device layout of the motor controller, avoid the need for a heat conduction structure, and facilitate the highly integrated design of the device.

[0029] The first terminal portions and the second terminal portions are respectively located outside or inside the wiring groove. The first terminal portions are circumferentially scattered to avoid the bearing, and the second terminal portions are circumferentially concentrated to achieve centralized connection of the motor controller and improve the circuit layout utilization of the motor controller.

[0030] 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. The operating space reserved between the bearing and the stator facilitates the connection of the terminals of the stator and the single-phase terminals. The bearing is stably provided in the mounting ring wall, which improves the operational stability of the motor, and the three single-phase terminals are located on the outer circumferential wall of the mounting ring wall, which makes it convenient for the mounting and positioning of the terminals of the stator.

[0031] The first collision avoidance groove can position the terminals of the stator, and optimize the layout space, thereby improving the connecting easiness and reliability. The inserting holes are used for the wire of some sensors such as temperature sensors to pass through, and the connecting holes are used for the single-phase terminals to pass through, so as to improve the isolation between the motor mounting chamber and the controller mounting chamber and avoid mutual interference.

[0032] The second collision avoidance grooves can accommodate the leads and terminals of the stator, thereby optimizing the layout space.

[0033] The liquid cooling channel of the housing communicates with the partition cooling grooves of the partition wall. Therefore, the waste heat of the bearing and the resolver can be quickly transferred from the partition wall to the housing, thereby improving the heat conduction efficiency and the operating performance of the drive assembly.

[0034] The present disclosure utilizes 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 liquid cooling channel of the housing communicates with the partition cooling grooves of the partition wall. Therefore, the waste heat of the bearing and some other components can be quickly transferred from the partition wall to the housing, thereby improving the heat conduction efficiency and the operating performance of the drive assembly.

[0035] The motor cooling groove is mainly used to dissipate the waste heat generated by the motor, and the controller cooling groove is mainly used to dissipate the waste heat generated by the motor controller.

[0036] The chamber cover isolates the two chambers, thereby improving the operation stability.

[0037] The three-phase terminal block is provided at the mounting hole, making it easy to connect with the motor controller and the stator.

[0038] The first terminal portions are provided at the outer circumference of the bearing, which does not affect the mounting and positioning of the rotor, thereby realizing the compact axial space arrangement of the drive assembly.

[0039] In the structural arrangement of the terminal block body, the second terminal portions are located in the wiring groove, thereby improving the space utilization and realizing a compact device layout.BRIEF DESCRIPTION OF THE DRAWINGS Description of drawings

[0040] 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 a structural view of a three-phase terminal block according to the embodiment of the drive assembly of the present disclosure; FIG. 7 is a structural view of the three-phase terminal block viewed from another perspective according to the embodiment of the drive assembly of the present disclosure; FIG. 8 is an exploded view of the three-phase terminal block according to the embodiment of the drive assembly of the present disclosure; FIG. 9 is a structural view of an outer circumferential wall of the housing according to the embodiment of the drive assembly of the present disclosure; FIG. 10 is a radial sectional view of the drive assembly at the partition wall according to the embodiment of the drive assembly of the present disclosure; FIG. 11 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. 12 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. 13 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. 14 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. 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.

[0041] 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:

[0042] 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 11, 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. Each connecting hole 113 has a diameter larger than that of each inserting hole 114. The three connecting holes 113 and the three inserting holes 114 are distributed alternately and evenly at intervals outside the bearing 17. The mounting ring wall 112 is provided with a first collision avoidance groove 116 at each connecting hole 113. The first collision avoidance groove 116 is arc-shaped and concaved toward the bearing 17. The partition wall 11 is provided with three second collision avoidance grooves 115 on a first end wall facing the motor mounting chamber 121. Each of the second collision avoidance grooves 115 extends in a direction inclined to a radial direction. The extending directions of two adjacent second collision avoidance grooves 115 form an acute angle (preferably 60°). 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. The respective second collision avoidance grooves 115 have a width that is the same as the diameter of the respective connecting holes 113. The cover 18 covers the controller mounting chamber 122 and is fixedly connected with the housing 1.

[0043] In the controller mounting chamber 122 opposite to the motor mounting chamber 121, the partition wall 11 is provided with a positioning ring wall 117 extending toward the controller mounting chamber 122 at the outer circumference of the mounting hole 111. The positioning ring wall 117 is located on a second end wall of the partition wall 11 facing the controller mounting chamber 122. The partition wall 11 is provided with three mounting platforms 118 at an outer side of the positioning ring wall 117. The mounting platforms 118 each have a B-shaped cross-section, and the mounting platforms 118 are each hollow inside. Each mounting platform 118 is located between two adjacent connecting holes 113. A fixing hole 119 is provided on an edge of a mounting platform 118 closer to the positioning ring wall 117, and three fixing holes 119 are evenly distributed along a circumferential direction of the positioning ring wall 117.

[0044] Referring to FIGS. 6 to 8 and FIG. 11, a three-phase terminal block 2 includes a terminal block body 21 and three single-phase terminals 22. The terminal block body 21 extends substantially in a cylindrical shape, and the terminal block body 21 is made of an insulating material such as plastic by injection molding. The terminal block body 21 includes a central ring portion 211, three outer connecting portions 212 and three inner connecting portions 213.

[0045] 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. The first terminal portion 222 and the second terminal portion 223 each are cylindrical and provided with a connection hole. The first terminal portion 222 and the second terminal portion 223 are respectively located on two ends along an axial direction of the terminal block body 21.

[0046] Referring to FIGS. 9 and 10, an outer wall of the housing 1 is provided with a liquid cooling channel. The liquid cooling channel includes a motor cooling groove 139 and a controller cooling groove 132. The motor cooling groove 139 is located on an outer wall of the motor mounting chamber 121, and the controller cooling groove 132 is located on an outer wall of the controller mounting chamber 122. The motor cooling groove 139 and the controller cooling groove 132 are respectively provided therein with heat-conducting posts to increase the heat conduction area. Multiple partition cooling grooves 133 are provided in the partition wall 11. The multiple partition cooling grooves 133 are distributed in a circumferential direction of the partition wall 11. Each partition cooling groove 133 is provided with an opening at an outer end, and is closed inside the partition wall 11. The partition cooling grooves 133 are located between the motor cooling groove 139 and the controller cooling groove 132. Outer ends of the partition cooling grooves 133, an outer end of the motor cooling groove 139 and an outer end of the controller cooling grooves 132 communicate with each other.

[0047] The multiple partition cooling grooves 133 each extend toward the bearing 17. Since the first terminal portions 222 and the inserting holes 114 need to be avoided, the partition cooling grooves 133 have different depths. The outer ends of the partition cooling grooves 133 and an outer end of the liquid cooling channel are open. The casing 14 covers the outer wall of the housing 1, and the casing 14 is located outside the partition cooling grooves 133 and the liquid cooling channel, so that the outer ends of the partition cooling grooves 133, the outer end of the motor cooling groove 139 and the outer end of the controller cooling groove 132 communicate with each other.

[0048] Referring to FIGS. 11 and 16, the drive assembly further includes a chamber cover 25 and a resolver 27. The chamber cover 25 covers the mounting hole 111 and is connected with the partition wall 11. The chamber cover 25 is provided with a removable baffle at a center thereof. The chamber cover 25 covers the resolver 27 at a side of the controller mounting chamber 122.

[0049] 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. The central ring portion 211 of the three-phase terminal block 2 is sleeved outside the positioning ring wall 117, the chamber cover 25 and the resolver 27.

[0050] In this way, the three-phase terminal block 2 is mounted to one end of the mounting hole 111 closer to the controller mounting chamber 122. Screws pass through mounting portions 26 and positioning holes 251 of the chamber cover 25 to be connected with the fixing holes 119. The three first terminal portions 222 are relatively scattered along an outer circumference of the bearing 17, and the three second terminal portions 223 are relatively concentrated. 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.

[0051] 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. Potting glue 19 is filled in a space formed by the mounting ring wall 112, the partition wall and the inner wall of the housing. Thus, the potting glue 19 covers the three first terminal portions 222, the three connecting holes, the three fixing holes, the terminals of the stator, and one end of the winding closer to the partition wall. This design improves protection and waterproofness, and achieves certain waste heat conduction and device fixation.

[0052] Referring to FIGS. 12 and 13, 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.

[0053] Referring to FIGS. 14 and 5, the motor controller 3 is provided in the motor mounting chamber 121.

[0054] The multiple power transistors 34 are arranged along a circumferential direction of the controller mounting chamber 122.

[0055] Referring to FIGS. 15 and 16, the motor controller 3 is mounted in the controller mounting chamber 122. Monitoring sensors such as temperature sensors may be mounted in the motor mounting chamber. Wirings of the sensors are passed through the respective inserting holes 114 to be electrically connected with the motor controller. The power transistors 34 surround a main circuit board 43. In addition, the controller cooling groove 132 surrounds the power transistors 34, so as to achieve rapid heat conduction.

[0056] 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 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:

[0057] 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.

[0058] 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. The bearing is stably provided in the mounting ring wall, which improves the operational stability of the motor, and the three single-phase terminals are located at the outer circumferential wall of the mounting ring wall, which makes it convenient for the mounting and positioning of the terminals of the stator. The first collision avoidance grooves can position the terminals of the stator, and optimize the layout space, thereby improving the connecting easiness and reliability. The fixing holes are configured to attach and fix the motor controller. The connecting holes and the fixing holes are located between the bearing and the stator, which is convenient for disassembly and assembly. The second collision avoidance grooves can accommodate the leads and terminals of the stator, thereby optimizing the layout space.

[0059] 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. The first terminal portions and the second terminal portions are respectively located outside or inside the wiring groove. The first terminal portions are circumferentially scattered to avoid the bearing, and the second terminal portions are circumferentially concentrated to achieve centralized connection of the motor controller and improve the circuit layout utilization of the motor controller.

[0060] The potting glue is filled on the end surface of the partition wall facing the motor mounting chamber, such that the potting glue covers the first terminal portions that are connected with the terminals of the stator. This realizes potting and sealing of the first terminal portions and the terminals of the stator, thereby effectively improving the protection and efficiently conducting the waste heat to the partition wall. The bearing is stably provided in the mounting ring wall, which improves the operational stability of the motor, and the three single-phase terminals are located on the outer circumferential wall of the mounting ring wall, which makes it convenient for the mounting and positioning of the terminals of the stator. In addition, the potting glue is accurately filled between the mounting ring wall, the partition wall and the inner wall of the housing, such that the waste heat generated by the bearing can also be conducted through the potting glue. The fixing holes are used to connect and fix the motor controller, and the connecting holes are used for the single-phase terminals to pass through, so as to improve the isolation between the motor mounting chamber and the controller mounting chamber and avoid mutual interference. The second collision avoidance grooves can accommodate the leads and terminals of the stator, thereby optimizing the layout space. In addition, the terminals and the leads of the stator, and an end of the winding are positioned by the potting glue.

[0061] The chamber cover isolates the two chambers. The connection groove is easy for wiring, thereby improving the operation stability.

[0062] The liquid cooling channel of the housing communicates with the partition cooling grooves of the partition wall. Therefore, the waste heat of the bearing and some other components can be quickly transferred from the partition wall to the housing, thereby improving the heat conduction efficiency and the operating performance of the drive assembly. Since the partition wall needs to support the bearing and other devices, the partition wall needs a certain structural space. Thus, the partition cooling grooves are distributed circumferentially to improve the heat conduction efficiency of the partition wall without affecting the strength. The motor cooling groove is mainly used to dissipate the waste heat generated by the motor, and the controller cooling groove is mainly used to dissipate the waste heat generated by the motor controller. The partition cooling grooves communicate with the motor cooling groove and the controller cooling groove. Therefore, the liquid cooling scheme of the integrated heat dissipation channel improves the heat dissipation efficiency and the performance of the drive assembly.

[0063] The multiple power transistors are circumferentially arranged and connected with the inner wall of the controller mounting chamber. The waste heat of the power transistors can be efficiently conducted to the interconnected controller cooling groove and motor cooling groove, realizing integrated liquid cooling and improving heat dissipation efficiency. Besides, using the inner circumferential wall as a heat conductor can effectively optimize the device layout of the motor controller, avoid the need for a heat conduction structure, and facilitate the highly integrated design of the device. The power transistors are turned on by time sharing in actual operation. Therefore, the distributed arrangement realizes time-sharing heat conduction at different positions, thereby further improving the heat conduction efficiency.Industrial Applicability

[0064] 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 drive assembly with a motor controller (3) at a rear end in an axial direction of the drive assembly, wherein the drive assembly comprises a housing (1), the motor controller (3), a bearing (17), a rotor (16), and a stator (15), wherein the housing (1) is cylindrical, and is provided therein with a chamber along the axial direction; 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); 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); projection planes of the three single-phase terminals (22) perpendicular to the axial direction are located between a projection plane of the bearing (17) perpendicular to the axial direction and a projection plane of the stator (15) perpendicular to the axial direction; and the drive assembly comprises a three-phase terminal block (2); the three-phase terminal block (2) comprises a terminal block body (21) and the three single-phase terminals (22); the three single-phase terminals (22) each are arranged along an axial direction of the terminal block body (21); the single-phase terminals (22) each are provided with a first terminal portion (222) and a second terminal portion (223), which are respectively located on two ends of the terminal block body (21) along an axial direction thereof; and the first terminal portions (222) are connected with the stator (15), and the second terminal portions (223) are connected with the motor controller (3); characterized in that the terminal block body (21) is cylindrical; and the three single-phase terminals (22) are arranged at an outer circumference of the terminal block body (21).

2. The drive assembly according to claim 1, wherein the partition wall (11) is provided with a mounting hole (111) and a mounting ring wall (112) extending toward the motor mounting chamber (121) at an outer circumference of the mounting hole (111); the bearing (17) is provided inside the mounting ring wall (112); and the three single-phase terminals (22) are located at an outer circumference of the mounting ring wall (112).

3. The drive assembly according to claim 2, wherein the three single-phase terminals (22) are located at an outer circumferential wall of the mounting ring wall (112); and the outer circumferential wall of the mounting ring wall (112) is provided with a first collision avoidance groove (116) at each of the three single-phase terminals (22).

4. The drive assembly according to claim 1, wherein the partition wall (11) is provided with three run-through connecting holes (113) and three run-through inserting holes (114); the three connecting holes (113) and the three inserting holes (114) are distributed alternately and evenly at intervals along an outer circumference of the bearing (17); and one single-phase terminal (22) passes through one connecting hole (113).

5. The drive assembly according to claim 4, wherein a first end wall of the partition wall (11) facing the motor mounting chamber (121) is provided with second collision avoidance grooves (115), which extends from the respective connecting hole (113) to the stator (15).

6. The drive assembly according to claim 2, wherein the drive assembly further comprises a chamber cover (25), which covers the mounting hole (111).

7. The drive assembly according to claim 6, wherein fixing holes (119) are provided on a second end wall of the partition wall (11) facing the controller mounting chamber (122), and the chamber cover (25) is located at a second end wall side, and is connected with the fixing holes (119).

8. The drive assembly according to claim 1, wherein an outer wall of the housing (1) is provided with a liquid cooling channel; the liquid cooling channel comprises a motor cooling groove (139) and a controller cooling groove (132) that communicate with each other; and the motor cooling groove (139) is located on an outer wall of the motor mounting chamber (121), and the controller cooling groove (132) is located on an outer wall of the controller mounting chamber (122); and the motor controller (3) comprises a circuit board assembly and multiple power transistors (34); the multiple power transistors (34) are provided at an outer circumference of the circuit board assembly, and are electrically connected with the circuit board assembly; and packages of the multiple power transistors (34) are connected with an inner wall of the controller mounting chamber (122).

9. A vehicle, comprising the drive assembly according to any one of claims 1 to 8.