Electric drive system and vehicle

Abstract

The present application relates to the technical field of electric drive, and provides an electric drive system and a vehicle. The electric drive system comprises a first housing, a second housing, a motor assembly, a reducer assembly and a controller assembly; the first housing is provided with a first accommodating cavity, and the motor assembly and the reducer assembly are both arranged in the first accommodating cavity; and the controller assembly is connected to the side of the second housing facing the first housing, and covers the first housing together with the second housing. The second housing is provided with a first cooling liquid path configured to dissipate heat from the controller assembly; the first housing is internally provided with a second cooling liquid path in communication with the first cooling liquid path, and configured to dissipate heat from the motor assembly. Therefore, space occupied by the electric drive system is reduced, and the weight of the electric drive system is reduced.

Description

Electric drive systems and vehicles

[0001] This application claims priority to Chinese Patent Application No. 202422610163.3, filed on October 28, 2024, entitled "Electric Drive System and Vehicle", the entire contents of which are incorporated herein by reference.

[0002] This application claims priority to Chinese Patent Application No. 202422608221.9, filed on October 28, 2024, entitled "Electric Drive System and Vehicle", the entire contents of which are incorporated herein by reference.

[0003] This application claims priority to Chinese Patent Application No. 202422610206.8, filed on October 28, 2024, entitled "Electric Drive System and Vehicle", the entire contents of which are incorporated herein by reference.

[0004] This application claims priority to Chinese Patent Application No. 202422610252.8, filed on October 28, 2024, entitled "Electric Drive System and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0005] This application relates to the field of electric drive technology, and in particular to an electric drive system and vehicle. Background Technology

[0006] With the rapid popularization of new energy vehicles, electric drive systems are developing rapidly towards higher power density, lower cost, higher integration, and higher efficiency. Under this trend, high power density requires motors with high power and compact size.

[0007] In related technologies, the electric drive system of new energy vehicles generally integrates a motor and a reducer. The output shaft of the motor cooperates with the reducer, so that the rotation of the motor output shaft is reduced by the reducer to output power. Both the motor and the reducer are installed in the housing of the electric drive system, while the controller of the electric drive system is installed separately in the controller housing. The controller housing needs to be sealed to ensure that the controller meets the protection level requirements. The controller housing and the electric drive system housing are then assembled and connected.

[0008] However, current electric drive systems occupy a large space and are relatively heavy. Summary of the Invention

[0009] This application provides an electric drive system and vehicle to solve the technical problems of current electric drive systems having a large overall structural footprint and heavy weight.

[0010] In a first aspect, this application provides an electric drive system, which includes a first housing, a second housing, a motor assembly, a reducer assembly, and a controller assembly. The first housing has a first receiving cavity, and the motor assembly and the reducer assembly are both disposed in the first receiving cavity. The controller assembly is connected to the side of the second housing facing the first housing and is disposed on top of the first housing together with the second housing.

[0011] The second housing has a first coolant passage configured to dissipate heat from the controller assembly; the first housing also has a second coolant passage connected to the first coolant passage, configured to dissipate heat from the motor assembly.

[0012] The electric drive system provided in this application integrates the controller assembly, motor assembly, and reducer assembly. The cooling of the controller assembly and the motor assembly share a water circuit, thereby reducing the space occupied by the electric drive system and lowering its weight.

[0013] In one possible implementation, the second housing and the outer wall of the first housing enclose a second receiving cavity, and the controller assembly is located in the second receiving cavity; the inlet of the first coolant circuit is located on the side of the second housing, the outlet of the first coolant circuit is connected to the second receiving cavity, and the outlet of the first coolant circuit is connected to the inlet of the second coolant circuit.

[0014] In one possible implementation, the first housing may include a housing body and a cooling water jacket, with the cooling water jacket disposed inside the first housing and sleeved on the outside of the motor assembly; the outer wall of the cooling water jacket is provided with a water guide groove, which, together with the inner wall of the housing body, forms a second coolant passage.

[0015] In one possible implementation, the cooling water jacket has annular sealing grooves at both ends along the axial direction, and a sealing ring is provided in the annular sealing groove, with the sealing ring abutting against the inner wall of the first housing.

[0016] In one possible implementation, a protrusion is provided on the top outer side of the first housing, and the circumferential edge of the second housing abuts against the protrusion; a sealing element is provided on the circumferential edge of the second housing; the sealing element abuts between the protrusion and the second housing.

[0017] In one possible implementation, the protrusion and the second housing can be integrally molded.

[0018] In one possible implementation, the reducer assembly may include a center gear, a first planetary gear, a second planetary gear, an internal gear ring, a planetary carrier, and a differential. The center gear meshes with the first planetary gear; the first planetary gear is rotatably connected to the planetary carrier; the first planetary gear and the second planetary gear are coaxially and fixedly connected, and the second planetary gear meshes with the internal gear ring; the internal gear ring is connected to the first housing.

[0019] The motor assembly may include a motor body and an output shaft. The motor body is configured to drive the output shaft to rotate, and the output shaft is coaxially and fixedly connected to the center wheel. The planetary carrier is connected to the input end of the differential. The output end of the differential is coaxially arranged with the output shaft.

[0020] In one possible implementation, the differential may include a differential housing, a first differential gear and a second differential gear, a planetary carrier connected to the differential housing, the first differential gear connected to the differential housing, the second differential gear meshing with the first differential gear, and the second differential gear coaxially connected to the output shaft.

[0021] In one possible implementation, the controller assembly may include a power module and an electrical connector connected to the power module; a first through hole is provided on the side of the first housing facing the second housing, the electrical connector passes through the first through hole and extends at least partially into the first receiving cavity, and the electrical connector is connected to the motor assembly.

[0022] Secondly, this application provides an automobile that includes the electric drive system described above.

[0023] This application provides an electric drive system and a vehicle. The electric drive system includes a first housing, a second housing, a motor assembly, a reducer assembly, and a controller assembly. The first housing has a first receiving cavity, within which the motor assembly and the reducer assembly are both disposed. The controller assembly is connected to the side of the second housing facing the first housing and is mounted on top of the first housing together with the second housing. The second housing has a first coolant passage configured to dissipate heat from the controller assembly. A second coolant passage is provided within the first housing, communicating with the first coolant passage, and is configured to dissipate heat from the motor assembly, thereby reducing the space occupied by the electric drive system and lowering its weight.

[0024] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that the electric drive system and vehicle provided by this application can solve, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 is a schematic diagram of the electric drive system provided in an embodiment of this application;

[0027] Figure 2 is a cross-sectional view of the electric drive system provided in an embodiment of this application;

[0028] Figure 3 is an exploded view of the electric drive system provided in an embodiment of this application;

[0029] Figure 4 is a schematic diagram of the structure of the second housing in the electric drive system provided in the embodiment of this application;

[0030] Figure 5 is a cross-sectional view of the assembly of the second housing and the controller assembly in the electric drive system provided in the embodiment of this application;

[0031] Figure 6 is a schematic diagram of the cooperation between the electrical connector and the first housing in the electric drive system provided in the embodiment of this application;

[0032] Figure 7 is a schematic diagram of the reducer assembly in the electric drive system provided in the embodiment of this application;

[0033] Figure 8 is a partial view of position B in Figure 3;

[0034] Figure 9 is a schematic diagram of the structure of the second housing in the electric drive system provided in the embodiment of this application;

[0035] Figure 10 is a schematic diagram of the assembly of the controller assembly on the second housing in the electric drive system provided in the embodiment of this application;

[0036] Figure 11 is a schematic diagram of the structure of the electrical connector in the electric drive system provided in the embodiment of this application;

[0037] Figure 12 is a front view of the electrical connectors in the electric drive system provided in the embodiment of this application;

[0038] Figure 13 is a cross-sectional view along the CC direction in Figure 6;

[0039] Figure 14 is a side view of the electric drive system provided in an embodiment of this application;

[0040] Figure 15 is a partial view of position A in Figure 2.

[0041] Explanation of reference numerals in the attached drawings: 10-Electric drive system; 100-Housing assembly; 101-First receiving cavity; 101a-First chamber; 101b-Second chamber; 102-Second receiving cavity; 103-Receiving groove; 1031-Mounting boss; 1032-First sealing surface; 104-Protrusion; 1041-Sealing groove; 1042-Second sealing surface; 1043-First connecting part; 105-First through hole; 106-Isolation wall; 107-Second through hole; 108 - Reinforcing rib; 109 - Third through hole; 1010 - Oil guide hole; 1011 - Oil guide groove; 110 - First housing; 111 - Housing body; 112 - Cooling water jacket; 113 - Annular sealing groove; 114 - First sealing ring; 115 - First end cap; 116 - Second end cap; 120 - Second housing; 121 - Sealing element; 122 - Second connecting part; 130 - First coolant passage; 140 - Second coolant passage; 200 - Motor assembly; 210 - Output shaft; 220 - First bearing; 230 - First oil seal; 300 - Reducer assembly; 310 - Center gear; 320 - First planetary gear; 330 - Second planetary gear; 340 - Internal gear ring; 350 - Planetary support; 360 - Differential; 361 - First differential gear; 362 - Second differential gear; 363 - Differential housing; 370 - Second bearing; 400 - Controller assembly; 410 - Power module; 420 - Electrical connector; 421 - Insulating sleeve; 422 - Metal busbar; 423 - First connection structure; 424 - Second connection structure; 430 - Second sealing ring; 440 - Signal line; 500 - Drive shaft. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0044] Secondly, it should be noted that in the description of this application, the terms "front", "rear", "left", "right", "up", "down", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0045] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Currently, the electric drive systems of new energy vehicles are rapidly developing towards higher power density, lower cost, higher integration, and higher efficiency. Under this trend, high power density requires motors with high power and compact size. The electric drive system of a new energy vehicle generally integrates a motor and a reducer. The motor's output shaft cooperates with the reducer, so that the rotation of the motor's output shaft is reduced in speed by the reducer to output power. Both the motor and the reducer are mounted in the housing of the electric drive system, while the controller of the electric drive system is installed separately in a controller housing. The controller housing needs to be sealed to meet the protection level requirements of the controller. The controller housing is then assembled and connected to the electric drive system housing.

[0048] However, since the controller is installed in a separate housing space, after the controller is assembled and tested, the controller housing is then installed on the motor housing. The existing structure and space on the motor housing cannot be utilized. As a result, the controller and motor need to be equipped with separate cooling systems, which leads to the overall structure of the electric drive system occupying a large space and being heavy.

[0049] To address the aforementioned issues, this application provides an electric drive system and an automobile that integrates a controller assembly, a motor assembly, and a reducer assembly. The cooling of the controller assembly and the motor assembly share a common water circuit, thereby reducing the space occupied by the electric drive system and lowering its weight.

[0050] The technical solution of this application will be described in detail below through specific embodiments.

[0051] Figure 1 is a structural schematic diagram of the electric drive system provided in an embodiment of this application; Figure 2 is a cross-sectional view of the electric drive system provided in an embodiment of this application; Figure 3 is an exploded view of the electric drive system provided in an embodiment of this application; Figure 4 is a structural schematic diagram of the second housing in the electric drive system provided in an embodiment of this application; Figure 5 is a cross-sectional view of the assembly of the second housing and the controller assembly in the electric drive system provided in an embodiment of this application; Figure 6 is a schematic diagram of the cooperation between the electrical connector and the first housing in the electric drive system provided in an embodiment of this application; Figure 7 is a structural schematic diagram of the reducer assembly in the electric drive system provided in an embodiment of this application.

[0052] As shown in Figures 1 to 7, this application provides an electric drive system 10, which includes a first housing 110, a second housing 120, a motor assembly 200, a reducer assembly 300, and a controller assembly 400. The first housing 110 has a first receiving cavity 101, and the motor assembly 200 and the reducer assembly 300 are both disposed in the first receiving cavity 101. The controller assembly 400 is connected to the side of the second housing 120 facing the first housing 110, and together with the second housing 120, covers the top of the first housing 110.

[0053] The second housing 120 has a first coolant passage 130, which is configured to dissipate heat from the controller assembly 400. The first housing 110 has a second coolant passage 140, which is connected to the first coolant passage 130 and is configured to dissipate heat from the motor assembly 200.

[0054] It is understood that the controller assembly 400 is connected to the side of the second housing 120 facing the first housing 110. When reassembling the controller assembly 400, the controller assembly 400 can be installed on the second housing 120 first, and then the second housing 120 with the controller assembly 400 installed can be placed on the first housing 110 to complete the assembly and sealing of the controller assembly 400.

[0055] The first housing 110 provides a mounting structure and housing space for the motor assembly 200, and a portion of the structure on the second housing 120 is integral with the second housing 120 to provide a housing space for the controller assembly 400. The housing of the controller assembly 400 can utilize a portion of the structure of the first housing 110, thereby enabling the integration of the controller assembly 400 and the motor assembly 200 during the assembly of the controller assembly 400.

[0056] It should be noted that in the electric drive system 10 provided in this application embodiment, by integrating the controller assembly 400, the motor assembly 200 and the reducer assembly 300, the cooling of the controller assembly 400 and the cooling of the motor assembly 200 share the same water circuit, thereby reducing the space occupied by the electric drive system 10 and reducing the weight of the electric drive system 10.

[0057] Please refer to Figures 1 through 7. In one possible implementation, the second housing 120 and the outer wall of the first housing 110 enclose a second receiving cavity 102, and the controller assembly 400 is located within the second receiving cavity 102. The inlet of the first coolant passage 130 is located on the side of the second housing 120, the outlet of the first coolant passage 130 is connected to the second receiving cavity 102, and the outlet of the first coolant passage 130 is connected to the inlet of the second coolant passage 140.

[0058] It is understood that the first coolant path 130 may include a cooling water tank on the side of the second housing 120 facing the first housing 110. The controller assembly 400 may contact the outer wall of the cooling water tank. The cooling water entering the cooling water tank can absorb the heat of the controller assembly 400 through heat conduction, thereby cooling the controller assembly 400.

[0059] In some embodiments, the first housing 110 may include a housing body 111 and a cooling water jacket 112. The cooling water jacket 112 is disposed inside the first housing 110 and sleeved on the outside of the motor assembly 200. The outer wall of the cooling water jacket 112 is provided with a water guiding groove, which, together with the inner wall of the housing body 111, forms a second coolant passage 140.

[0060] For example, the water guide groove can extend spirally around the outer wall of the cooling water jacket 112, so that the cooling water entering the second coolant passage 140 flows spirally around the outer circumference of the motor assembly 200 along the water guide groove, thereby increasing the contact area of ​​the cooling water, extending the cooling time, and improving the cooling efficiency.

[0061] In some embodiments, the cooling water jacket 112 is provided with annular sealing grooves 113 at both ends along the axial direction, and a first sealing ring 114 is provided in the annular sealing groove 113, the first sealing ring 114 abutting against the inner wall of the first housing 110.

[0062] Understandably, the first sealing ring 114 can prevent cooling water from leaking into the first housing 110.

[0063] For example, the first sealing ring 114 can be made of elastic materials such as rubber or silicone, and this application embodiment does not specifically limit this.

[0064] For example, two or more first sealing rings 114 may be provided at both ends of the cooling water jacket 112, and each first sealing ring 114 is provided in the sealing groove on the outer wall of the cooling water jacket 112, thereby having better sealing performance.

[0065] Please refer to Figures 1 through 7. In one possible implementation, a protrusion 104 is provided on the top outer side of the first housing 110, and the circumferential edge of the second housing 120 abuts against the protrusion 104; a sealing member 121 is provided on the circumferential edge of the second housing 120. The sealing member 121 abuts between the protrusion 104 and the second housing 120.

[0066] Understandably, the protrusion 104 may be annular on the top of the first housing 110. The first housing 110 covers the protrusion 104 above the second housing 120. The circumferential edge of the second housing 120 abuts against the protrusion 104. When the second housing 120 is attached to the protrusion 104, the controller assembly 400 is at least partially located within the receiving groove 103 formed by the protrusion 104.

[0067] For example, the seal 121 can be bonded to the circumferential edge of the second housing 120 with sealant. The stepped structure of the top inner edge of the protrusion 104, when the second housing 120 is connected and assembled with the first housing 110, causes the second housing 120 to abut against the protrusion 104, compressing the seal 121 between the top of the second housing 120 and the protrusion 104 to achieve a good sealing effect.

[0068] It should be noted that the protrusion 104 and the second housing 120 can be integrally formed. The materials of the first housing 110 and the second housing 120 can be metals or alloys such as iron and aluminum. This application embodiment does not limit the specific materials of the first housing 110 and the second housing 120.

[0069] In one possible implementation, the reducer assembly 300 may include a center gear 310, a first planetary gear 320, a second planetary gear 330, an internal gear ring 340, a planetary carrier 350, and a differential 360. The center gear 310 meshes with the first planetary gear 320, the first planetary gear 320 is rotatably connected to the planetary carrier 350, the first planetary gear 320 and the second planetary gear 330 are coaxially fixedly connected, the second planetary gear 330 meshes with the internal gear ring 340, and the internal gear ring 340 is connected to the first housing 110.

[0070] The motor assembly 200 may include a motor body and an output shaft 210. The motor body is configured to drive the output shaft 210 to rotate, and the output shaft 210 is coaxially and fixedly connected to the center wheel 310. The planetary carrier 350 is connected to the input end of the differential 360. The output end of the differential 360 is coaxially arranged with the output shaft 210.

[0071] Understandably, when the motor is operating, the motor body drives the output shaft 210 to rotate, which in turn drives the central gear 310 to rotate. The central gear 310, through meshing with the first planetary gear 320, drives the first planetary gear 320 to rotate. Since the first planetary gear 320 and the second planetary gear 330 are coaxially connected, the first planetary gear 320 can drive the second planetary gear 330 to rotate synchronously on its own axis and revolve synchronously around the internal gear ring 340. The first planetary gear 320 and the second planetary gear 330 are rotatably connected to the planetary carrier 350. As the first planetary gear 320 and the second planetary gear 330 revolve, the planetary carrier 350 rotates axially around the central gear 310, transmitting power to the differential 360.

[0072] In some embodiments, the differential 360 may include a differential housing 363, a first differential gear 361 and a second differential gear 362, a planetary carrier 350 connected to the differential housing 363, the first differential gear 361 connected to the differential housing 363, the second differential gear 362 meshing with the first differential gear 361, and the second differential gear 362 coaxially connected to the output shaft 210.

[0073] It is understood that the output shaft 210, internal gear ring 340, planetary carrier 350, and differential housing 363 are all coaxially arranged. When the planetary carrier 350 rotates axially around the output shaft 210, it drives the differential housing 363 to rotate. The differential housing 363 drives the first differential gear 361 to revolve axially around the internal gear ring 340, so that the first differential gear 361 drives the second differential gear 362 to rotate. The second differential gear 362 rotates on its own axis and can output power to the outside of the electric drive system 10.

[0074] For example, the electric drive system 10 may further include a drive shaft 500, and an output shaft 210 having through holes at both ends, through which the drive shaft 500 passes. The drive shaft 500 is connected to a second differential gear 362 in the reducer assembly 300 so that the input and output ends of the reducer assembly 300 are coaxial, thereby improving space utilization within the electric drive system 10 and reducing the overall volume of the electric drive system 10.

[0075] It should be noted that, since the differential housing 363 is connected to the planetary support 350, the differential housing 363 can be located in the middle of the reducer assembly 300. The differential 360 can utilize the axial space of the reducer assembly 300 without having to be arranged on the side of the reducer gear, thereby reducing the space occupied by the reducer assembly 300 in the receiving cavity.

[0076] In some embodiments, the first receiving cavity 101 includes a first chamber 101a and a second chamber 101b, which are arranged along a first direction. The assembly direction of the second housing 120 relative to the first housing 110 is a second direction. The first direction is perpendicular to the second direction.

[0077] The first direction can be horizontal, and the second direction can be vertical.

[0078] A partition wall 106 is provided between the first chamber 101a and the second chamber 101b. The motor assembly 200 includes an output shaft 210, which extends from the first chamber 101a through a first through hole 105 to the second chamber 101b and connects to the reducer assembly 300. The output power of the motor assembly 200 is transmitted to the reducer assembly 300 through the output shaft 210. The second chamber 101b is filled with lubricating oil, which lubricates the reducer assembly 300 when the electric drive system 10 is working. The partition wall 106 prevents lubricating oil splashed up by the reducer assembly 300 from entering the first chamber 101a, thereby ensuring a clean working environment for the motor assembly 200.

[0079] In one possible implementation, the controller assembly 400 may include a power module 410 and an electrical connector 420, the electrical connector 420 being connected to the power module 410; the first housing 110 is provided with a first through hole 105 on the side facing the second housing 120, the electrical connector 420 passes through the first through hole 105 and extends at least partially into the first receiving cavity 101, and the electrical connector 420 is connected to the motor assembly 200.

[0080] It is understandable that when assembling the electric drive system 10, the controller assembly 400 can be installed on the housing assembly first, that is, the electrical connector 420 is installed on the housing assembly first. When the housing assembly is assembled and enclosed to form the second receiving cavity 102, the electrical connector 420 passes through the first through hole 105, and then the electrical connector 420 can be assembled with the motor assembly 200 without having to separately assemble the electrical connector 420 from outside the housing assembly after the controller assembly 400 is assembled.

[0081] It should be noted that in the electric drive system 10 provided in this application embodiment, the housings of the motor assembly 200 and the controller assembly 400 are integrated by structural design of the housing assembly, and a through hole is provided between the two housings for the electrical connector 420 to pass through, so that there is no need to open an installation port from the side of the housing, which simplifies the assembly process of the electrical connection and improves the sealing performance of the space where the electrical components are located.

[0082] As shown in Figures 1 to 9, this application embodiment provides an electric drive system 10, which includes a first housing 110, a second housing 120, a motor assembly 200, and a controller assembly 400. The first housing 110 has a first receiving cavity 101, and the motor assembly 200 is disposed within the first receiving cavity 101. The top of the first housing 110 has a receiving groove 103, and the second housing 120 covers the receiving groove 103 and together with the receiving groove 103 forms a second receiving cavity 102. The controller assembly 400 is located within the second receiving cavity 102.

[0083] The controller assembly 400 is connected to the side of the second housing 120 facing the receiving groove 103. When assembling the controller assembly 400, the controller assembly 400 can be installed on the second housing 120 first, and then the second housing 120 with the controller assembly 400 installed can be placed on the first housing 110 to complete the assembly and sealing of the controller assembly 400.

[0084] It is understood that the first housing 110 provides a mounting structure and housing space for the motor assembly 200, and a portion of the structure on the second housing 120 is integral with the second housing 120 to provide a housing space for the controller assembly 400. The housing of the controller assembly 400 can utilize a portion of the structure of the first housing 110, thereby enabling the integration of the controller assembly 400 and the motor assembly 200 during the assembly of the controller assembly 400.

[0085] The first housing 110 and the second housing 120 are directly sealed relative to each other so that the controller assembly 400 meets the protection level requirements of the vehicle.

[0086] It should be noted that in the electric drive system 10 provided in this application embodiment, the housing of the motor assembly 200 is provided by the first housing 110, and the housing of the controller assembly 400 is jointly provided by the first housing 110 and the second housing 120. The first housing 110 and the second housing 120 are assembled and connected together, realizing the integration of the controller housing and the housing of the motor assembly 200. The assembly of the controller assembly 400 is completed by the docking of the first housing 110 and the second housing 120. The controller assembly 400 is installed on the second housing 120, and the setting of the controller assembly 400 utilizes the accommodating space on the first housing 110, thereby reducing the volume and weight of the electric drive system 10.

[0087] The following section will first provide a detailed description of the specific structure of the docking assembly of the first housing 110 and the second housing 120.

[0088] Referring to Figures 1 through 9, in one possible implementation, the top outer side of the first housing 110 has a protrusion 104, which surrounds and forms a receiving groove 103. The outline shape of the protrusion 104 matches the outline shape of the second housing 120.

[0089] Understandably, the protrusion 104 may be annular on the top of the first housing 110. The first housing 110 covers the protrusion 104 above the second housing 120. The circumferential edge of the second housing 120 abuts against the protrusion 104. When the second housing 120 is attached to the protrusion 104, the controller assembly 400 is at least partially located within the receiving groove 103.

[0090] In some embodiments, the electric drive system 10 may further include a seal surrounding the circumferential edge of one of the protrusion 104 and the second housing 120. A sealing groove 1041 is provided on the circumferential edge of the other of the protrusion 104 and the second housing 120, and the seal abuts against the sealing groove 1041. This improves the sealing of the space containing the controller assembly 400, ensuring that the controller assembly 400 meets protection level requirements.

[0091] For example, the sealing groove 1041 can be provided on the protrusion 104 or on the second housing 120, and this application embodiment does not specifically limit it.

[0092] Understandably, the seal can be bonded to the circumferential edge of the second housing 120 using sealant. The sealing groove 1041 can be a stepped structure on the inner edge of the top of the protrusion 104. When the second housing 120 is connected and assembled with the first housing 110, the second housing 120 abuts against the protrusion 104, and the seal is compressed between the top of the second housing 120 and the protrusion 104 to achieve a good sealing effect.

[0093] For example, the seal can be an annular sealing ring, and the material of the seal can be elastic materials such as rubber and silicone. The specific material of the seal is not limited in the embodiments of this application.

[0094] In some embodiments, the protrusion 104 has a second sealing surface 1042 disposed circumferentially therearound it, and the circumferential edge of the second housing 120 abuts against the second sealing surface 1042. The assembly direction of the second housing 120 relative to the first housing 110 is perpendicular to the second sealing surface 1042.

[0095] It is understood that the second sealing surface 1042 at the top of the protrusion 104 can be a horizontal plane, and the second housing 120 can be assembled relative to the first housing 110 from top to bottom. When the second housing 120 abuts against the first housing 110 and the assembly is completed, the seal can be located inside the second sealing surface 1042.

[0096] In some embodiments, the circumferential edge of the protrusion 104 is provided with a first connecting portion 1043, and the circumferential edge of the second housing 120 is provided with a second connecting portion 122, with the first connecting portion 1043 and the second connecting portion 122 facing each other. The first connecting portion 1043 is fixedly connected to the second connecting portion 122 by a fastener.

[0097] It is understood that the first connecting portion 1043 can be a protruding structure circumferentially outward of the protrusion 104. The first connecting portion 1043 and the second connecting portion 122 can be provided with mounting through holes, and the two can be fixed by screwing a bolt through the mounting through hole and a nut. Alternatively, one of the first connecting portion 1043 and the second connecting portion 122 can be provided with a mounting through hole, and the other with a bolt hole, and the first housing 110 and the second housing 120 can be fixed by screwing a bolt through the mounting through hole and a threaded hole.

[0098] For example, the second housing 120 is provided with a seal 121 on its circumferential edge.

[0099] In some embodiments, the outer wall of the first housing 110 has a reinforcing rib 108, which is connected to the side wall of the protrusion 104 facing the interior of the receiving groove 103. The reinforcing rib 108 can improve the structural strength of the first housing 110 and improve the structural reliability of the protrusion 104.

[0100] There can be multiple reinforcing ribs 108, which can extend in different directions within the receiving groove 103, thereby improving the structural strength of the protrusion 104.

[0101] For example, some of the reinforcing ribs 108 may extend longitudinally along the first housing 110, and some of the reinforcing ribs 108 may extend laterally along the first housing 110.

[0102] For example, the reinforcing rib 108 can be integrally formed with the first housing 110.

[0103] It should be noted that the protrusion 104 and the second housing 120 can be integrally formed. The materials of the first housing 110 and the second housing 120 can be metals or alloys such as iron and aluminum. This application embodiment does not limit the specific materials of the first housing 110 and the second housing 120.

[0104] Referring to Figures 1 through 9, in one possible implementation, the first receiving cavity 101 may include a first chamber 101a and a second chamber 101b, with the motor assembly 200 disposed within the first chamber 101a. The electric drive system 10 may also include a reducer assembly 300 disposed within the second chamber 101b.

[0105] Understandably, the inner wall of the first housing 110 serves to mount, fix, and support the motor assembly 200 and the reducer assembly 300. The motor assembly 200 can output rotational speed after being powered on, and the power from the motor assembly 200 can be transmitted to the reducer assembly 300, which is used to reduce the speed of the motor assembly 200.

[0106] In some embodiments, the first chamber 101a and the second chamber 101b are arranged along a first direction. The assembly direction of the second housing 120 relative to the first housing 110 is a second direction. The first direction is perpendicular to the second direction.

[0107] Here, the first direction is defined as the X direction, which can be horizontal. The second direction is defined as the Y direction, which can be vertical.

[0108] A partition wall 106 is provided between the first chamber 101a and the second chamber 101b. The motor assembly 200 includes an output shaft 210, which extends from the first chamber 101a through the partition wall 106 to the second chamber 101b and connects to the reducer assembly 300. The output power of the motor assembly 200 is transmitted to the reducer assembly 300 through the output shaft 210. The second chamber 101b is filled with lubricating oil, which lubricates the reducer assembly 300 when the electric drive system 10 is working. The partition wall 106 prevents lubricating oil splashed up by the reducer assembly 300 from entering the first chamber 101a, thereby ensuring a clean working environment for the motor assembly 200.

[0109] In some embodiments, the first housing 110 has a through-hole communicating with the receiving groove 103 and the first receiving cavity 101. The controller assembly 400 may include an electrical connector that is at least partially inserted into the through-hole and is electrically connected to the motor assembly 200.

[0110] It is understood that the motor assembly 200 may include a three-phase asynchronous motor, and the electrical connector includes a three-phase connector that is electrically connected to the three-phase asynchronous motor, so that when the electric drive system 10 is applied to a vehicle, it can supply power to the three-phase asynchronous motor. The electrical connector may also include signal lines, which can be used to transmit control signals or sensor detection signals. The specific functions of the electrical connector are not limited in the embodiments of this application.

[0111] In one possible implementation, the first housing 110 may include a motor housing and a first end cap 115. The motor housing is configured to form a first chamber 101a, and a partition wall 106 is formed on the sidewall of the motor housing facing the first end cap 115. The first end cap 115 and the partition wall 106 enclose a second chamber 101b, thereby improving the ease of housing assembly and reducing production costs.

[0112] Understandably, the housing may also include a second end cover 116, which is connected to the end of the motor housing away from the first end cover 115. The second end cover 116 is used to limit, fix and protect the end of the motor assembly 200 away from the reducer assembly 300.

[0113] For example, the electric drive system 10 may also include a cooling water jacket 112, which is disposed inside the first housing 110 and surrounds the motor assembly 200. A water flow channel may be formed between the cooling water jacket 112 and the inner wall of the first housing 110 for introducing cooling water to dissipate heat from the motor when the motor assembly 200 is working and generating heat.

[0114] It should be noted that the motor assembly 200 may include a rotor and a stator, the stator being connected to the thermal management water channel and the rotor being connected to the output shaft 210.

[0115] In some embodiments, the input end of the reducer assembly 300 is connected to the output shaft 210, and the reducer assembly 300 can be a planetary reducer or a parallel gear reducer.

[0116] For example, the reducer assembly 300 can be a planetary reducer, and the electric drive system 10 can also include a drive shaft 500. The output shaft 210 has a through hole at both ends, and the drive shaft 500 passes through the through hole. The drive shaft 500 is connected to the reducer assembly 300 so that the input and output ends of the reducer assembly 300 are coaxial, thereby improving the space utilization within the electric drive system 10 and reducing the overall volume of the electric drive system 10.

[0117] Please refer to Figures 10 to 13, and in conjunction with Figures 1 to 6, this application embodiment provides an electric drive system 10, which includes a housing assembly 100, a motor assembly 200, and a controller assembly 400. The housing assembly 100 has a first receiving cavity 101 and a second receiving cavity 102. The motor assembly 200 is disposed in the first receiving cavity 101, and the controller assembly 400 is disposed in the second receiving cavity 102.

[0118] The controller assembly 400 includes a power module 410 and an electrical connector 420, with the electrical connector 420 connected to the power module 410. A first through hole 105 is provided in the cavity wall between the first receiving cavity 101 and the second receiving cavity 102. The power module 410 is connected to the side of the second receiving cavity 102 facing away from the first receiving cavity 101. The electrical connector 420 extends towards the first receiving cavity 101 and passes through the first through hole 105, connecting to the motor assembly 200.

[0119] It is understandable that when assembling the electric drive system 10, the controller assembly 400 can be installed on the housing assembly 100 first, that is, the electrical connector 420 is installed on the housing assembly 100 first. When the housing assembly 100 is assembled and enclosed to form the second receiving cavity 102, the electrical connector 420 passes through the first through hole 105, and then the electrical connector 420 can be assembled with the motor assembly 200 without having to separately assemble the electrical connector 420 from outside the housing assembly 100 after the controller assembly 400 is assembled.

[0120] It should be noted that in the electric drive system 10 provided in this application embodiment, the housing of the motor assembly 200 and the controller assembly 400 are integrated by the structural design of the housing assembly 100, and a through hole is provided between the two housings for the electrical connector 420 to pass through, so that there is no need to open an installation port from the side of the housing, which simplifies the assembly process of the electrical connection and improves the sealing performance of the space where the electrical components are located.

[0121] The specific structure of the electrical connector 420 will be described in detail below.

[0122] Referring to Figures 10 to 13, and in conjunction with Figures 1 to 6, in one possible implementation, the electrical connector 420 may include an insulating sleeve 421 and three metal bars 422, with the insulating sleeve 421 plastically covering the outside of the three metal bars 422. The first ends of the three metal bars 422 are respectively connected to the power module 410. The second ends of the three metal bars 422 all pass through the first through hole 105 and are connected to the motor assembly 200.

[0123] Understandably, the motor assembly 200 may include a motor body, which may be a three-phase asynchronous motor. The three metal busbars 422 correspond to the W, V, and U power lines of the three-phase motor, respectively. The insulating sleeve 421 can encapsulate the three metal busbars 422 together, ensuring that the three metal busbars 422 can be assembled synchronously and that there is good insulation performance between the three metal busbars 422.

[0124] For example, the insulating sleeve 421 and the three metal bars 422 can be formed by a plastic coating process. The material of the insulating sleeve 421 can be insulating plastic or insulating rubber, etc., and this application embodiment does not specifically limit it.

[0125] For example, all three metal busbars 422 can be copper busbars. In addition, other conductive metals or alloys can also be used. This application does not specifically limit this.

[0126] In some embodiments, the first ends of the three metal bars 422 are all connected to a first connection structure 423, and the first connection structure 423 is connected to the power module 410 by fasteners, thereby improving the convenience of connection and assembly between the metal bars 422 and the power module 410.

[0127] For example, the first connecting structure 423 may be a columnar structure, and the first connecting structure 423 may be provided with connecting holes. The first connecting structure 423 may be welded to the metal busbar 422, or the first connecting structure 423 may be integrally formed with the metal busbar 422. This application embodiment does not specifically limit this.

[0128] In some embodiments, the insulating sleeve 421 has a second connection structure 424, which is fixedly connected to the housing by fasteners.

[0129] It is understood that the second connecting structure 424 can be set on the side of the insulating sleeve 421, and the housing can be provided with threaded holes. The second connecting structure 424 can be fixedly connected to the housing by bolt fasteners.

[0130] For example, the second connecting structure 424 may protrude to the side of the insulating sleeve 421. The second connecting structure 424 may be integrally formed with the insulating sleeve 421.

[0131] In one possible implementation, the housing may include a first housing 110 and a second housing 120. The first housing 110 is configured to form a first receiving cavity 101, and its top has a receiving groove 103. The second housing 120 covers the receiving groove 103 and, together with the receiving groove 103, forms a second receiving cavity 102. The controller assembly 400 is connected to the second housing 120.

[0132] The controller assembly 400 is connected to the side of the second housing 120 facing the receiving groove 103. When assembling the controller assembly 400, the controller assembly 400 can be installed on the second housing 120 first, and then the second housing 120 with the controller assembly 400 installed can be placed on the first housing 110 to complete the assembly and sealing of the controller assembly 400.

[0133] It is understood that the first housing 110 provides a mounting structure and housing space for the motor assembly 200, and a portion of the structure on the second housing 120 is integral with the second housing 120 to provide a housing space for the controller assembly 400. The housing of the controller assembly 400 can utilize a portion of the structure of the first housing 110, thereby enabling the integration of the controller assembly 400 and the motor assembly 200 during the assembly of the controller assembly 400.

[0134] The first housing 110 and the second housing 120 are directly sealed relative to each other so that the controller assembly 400 meets the protection level requirements of the vehicle.

[0135] In some embodiments, a mounting boss 1031 is provided in the receiving groove 103, and a first through hole 105 is provided in the mounting boss 1031. The insulating sleeve 421 is sealed to the mounting boss 1031.

[0136] It is understandable that the mounting boss 1031 can protrude upward from the first housing 110. The mounting boss 1031 can be integrally formed with the first housing 110.

[0137] In some embodiments, the electrical connector 420 may further include a second sealing ring 430, which is circumferentially disposed around the insulating sleeve 421. The mounting boss 1031 has a first sealing surface 1032, and the second sealing ring 430 abuts against the first sealing surface 1032, thereby ensuring good sealing performance when the insulating sleeve 421 is assembled and abuts against the mounting boss 1031 on the first housing 110.

[0138] For example, the second sealing ring 430 can be made of elastic sealing materials such as rubber or silicone.

[0139] In some embodiments, the controller component 400 may further include a signal line 440.

[0140] It is understood that the signal line 440 can be used to transmit control signals or sensor detection signals, and the specific functions included in the electrical connector 420 are not limited in this application embodiment.

[0141] For example, the signal line 440 and the electrical connector 420 are both passed through the first through hole 105. This improves the ease of manufacturing the housing assembly 100 and the convenience of passing the signal line 440 through it.

[0142] For example, the mounting boss 1031 is provided with a second through hole 107, through which the signal line 440 passes. In this way, during the insertion process, the signal line 440 and the electrical connector 420 can be sealed respectively, improving the sealing reliability.

[0143] For example, the insulating sheath 421 is plastic-coated on the outside of the signal line 440. The assembly and connection of the signal line 440 can be performed simultaneously when assembling the insulating sheath 421, simplifying the assembly process and improving assembly efficiency.

[0144] For example, the controller assembly 400 may further include a seal that wraps around the outside of the signal line 440 and is sealingly connected to the mounting boss 1031. In this way, the signal line 440 can be individually sealed to the mounting boss 1031 via the seal, improving the sealing performance at the location of the second through hole 107.

[0145] Referring to Figures 10 to 13, and in conjunction with Figures 1 to 6, in one possible implementation, the top outer side of the first housing 110 has a protrusion 104, which surrounds and forms a receiving groove 103. The outline shape of the protrusion 104 matches the outline shape of the second housing 120. The protrusion 104 is sealingly connected to the second housing 120.

[0146] Understandably, the protrusion 104 may be annular on the top of the first housing 110. The first housing 110 covers the protrusion 104 above the second housing 120. The circumferential edge of the second housing 120 abuts against the protrusion 104. When the second housing 120 is attached to the protrusion 104, the controller assembly 400 is at least partially located within the receiving groove 103.

[0147] In some embodiments, the first chamber 101a and the second chamber 101b are arranged along a first direction. The assembly direction of the second housing 120 relative to the first housing 110 is a second direction. The first direction is perpendicular to the second direction.

[0148] The first direction can be horizontal, and the second direction can be vertical.

[0149] A partition wall 106 is provided between the first chamber 101a and the second chamber 101b. The motor assembly 200 includes an output shaft 210, which extends from the first chamber 101a through a first through hole 105 to the second chamber 101b and connects to the reducer assembly 300. The output power of the motor assembly 200 is transmitted to the reducer assembly 300 through the output shaft 210. The second chamber 101b is filled with lubricating oil, which lubricates the reducer assembly 300 when the electric drive system 10 is working. The partition wall 106 prevents lubricating oil splashed up by the reducer assembly 300 from entering the first chamber 101a, thereby ensuring a clean working environment for the motor assembly 200.

[0150] In one possible implementation, the first housing 110 may include a motor housing and a first end cap 115. The motor housing is configured to form a first chamber 101a, and a partition wall 106 is formed on the sidewall of the motor housing facing the first end cap 115. The first end cap 115 and the partition wall 106 enclose a second chamber 101b, thereby improving the ease of housing assembly and reducing production costs.

[0151] Understandably, the housing may also include a second end cover 116, which is connected to the end of the motor housing away from the first end cover 115. The second end cover 116 is used to limit, fix and protect the end of the motor assembly 200 away from the reducer assembly 300.

[0152] For example, the electric drive system 10 may also include a cooling water jacket 112, which is disposed inside the first housing 110 and surrounds the motor assembly 200. A water flow channel may be formed between the cooling water jacket 112 and the inner wall of the first housing 110 for introducing cooling water to dissipate heat from the motor when the motor assembly 200 is working and generating heat.

[0153] It should be noted that the motor assembly 200 may include a rotor and a stator, the stator being connected to the thermal management water channel and the rotor being connected to the output shaft 210.

[0154] In some embodiments, the input end of the reducer assembly 300 is connected to the output shaft 210, and the reducer assembly 300 can be a planetary reducer or a parallel gear reducer.

[0155] For example, the reducer assembly 300 can be a planetary reducer, and the electric drive system 10 can also include a drive shaft 500. The output shaft 210 has a through hole at both ends, and the drive shaft 500 passes through the through hole. The drive shaft 500 is connected to the reducer assembly 300 so that the input and output ends of the reducer assembly 300 are coaxial, thereby improving the space utilization within the electric drive system 10 and reducing the overall volume of the electric drive system 10.

[0156] Referring to Figures 14 and 15, and in conjunction with Figures 1 to 3, this application provides an electric drive system 10, which includes a housing assembly 100, a motor assembly 200, and a reducer assembly 300. The housing assembly 100 has a first chamber 101a and a second chamber 101b. The motor assembly 200 is disposed in the first chamber 101a, and the reducer assembly 300 is disposed in the second chamber 101b. The inner wall of the housing assembly 100 serves to mount, fix, and support the motor assembly 200 and the reducer assembly 300. When energized, the motor assembly 200 can output a rotational speed, and the power from the motor assembly 200 can be transmitted to the reducer assembly 300, which reduces the speed of the motor assembly 200.

[0157] A partition wall 106 is provided between the first chamber 101a and the second chamber 101b. The partition wall 106 has a third through hole 109. The motor assembly 200 includes an output shaft 210, which extends from the first chamber 101a through the third through hole 109 to the second chamber 101b and connects to the reducer assembly 300. The output power of the motor assembly 200 is transmitted to the reducer assembly 300 via the output shaft 210. Lubricating oil is injected into the second chamber 101b, which lubricates the reducer assembly 300 during operation of the electric drive system 10. The partition wall 106 prevents lubricating oil splashed up by the reducer assembly 300 from entering the first chamber 101a, thus ensuring a clean working environment for the motor assembly 200.

[0158] Understandably, the electric drive system 10 also includes a first bearing 220, which is located between the output shaft 210 and the inner wall of the third through hole 109. The first bearing 220 provides support for the output shaft 210. An oil guide hole 1010 is provided on the isolation wall 106. The first end of the oil guide hole 1010 communicates with the first chamber 101a, and the second end of the oil guide hole 1010 is opposite to the first bearing 220.

[0159] When the electric drive system 10 is working, the gears of the reducer assembly 300 can throw the lubricant in the second chamber 101b onto the cavity wall of the second chamber 101b. The cavity wall of the isolation wall 106 facing the second chamber 101b is also covered with lubricating oil. The lubricating oil on the isolation wall 106 flows under the action of gravity, and at least part of it can flow into the oil guide hole 1010. The lubricating oil in the oil guide hole 1010 can then flow to the first bearing 220 and lubricate it.

[0160] It should be noted that in the electric drive system 10 provided in this application embodiment, by providing an oil guide hole 1010 on the isolation wall 106 of the housing assembly 100, the lubricating oil in the second chamber 101b is guided to the first bearing 220 on the output shaft 210 of the motor, thereby providing good lubrication to the bearing of the output shaft 210 of the motor, reducing the wear of the first bearing 220, improving the service life of the first bearing 220, and thus improving the reliability of the electric drive system 10.

[0161] Referring to Figures 14 and 15, and in conjunction with Figures 1 to 3, in one possible implementation, the second end of the oil guide hole 1010 is connected to the side of the first bearing 220 facing the second chamber 101b, thereby allowing lubricant to be introduced into the first bearing 220 and preventing the lubricant from flowing directly back into the second chamber 101b.

[0162] Understandably, the first bearing 220 includes an inner ring, an outer ring, and rollers disposed between the inner and outer rings. The inner ring of the first bearing 220 is fitted onto and connected to the output shaft 210, and the outer ring is connected to the inner wall of the third through hole 109. The oil guide hole 1010 guides lubricating oil to the side of the first bearing 220 facing the first chamber 101a, allowing more lubricating oil to enter between the inner and outer rings of the first bearing 220 to lubricate the rollers of the first bearing 220.

[0163] In some embodiments, the electric drive system 10 may further include a first oil seal 230, which is located on the side of the first bearing 220 facing the second chamber 101b and abuts against the output shaft 210 and the isolation wall 106. A gap exists between the first oil seal 230 and the first bearing 220, and the second end of the oil guide hole 1010 communicates with the gap. The first oil seal 230 provides a good seal for the first chamber 101a, preventing lubricating oil introduced into the first bearing 220 from entering the first chamber 101a and affecting the motor.

[0164] The first oil seal 230 is a flexible component, and it has an interference fit with the output shaft 210 and the isolation wall 106. When the output shaft 210 rotates, there is sliding friction between the first oil seal 230 and the output shaft 210. The first oil seal 230 can seal the space between the output shaft 210 and the isolation wall 106, ensuring the smooth rotation of the output shaft 210 while preventing lubricant from entering the first chamber 101a.

[0165] In some embodiments, the isolation wall 106 is provided with an oil guide groove 1011 on the side facing the second chamber 101b, and the first end of the oil guide hole 1010 is connected to the oil guide groove 1011, so that the lubricating oil thrown onto the isolation wall 106 by the reducer assembly 300 in the second chamber 101b can be guided to the oil guide hole 1010, ensuring that the first bearing 220 has enough lubricating oil for lubrication.

[0166] For example, the oil guide groove 1011 is positioned higher than the output shaft 210. When lubricating oil adhering to the isolation wall 106 enters the oil guide groove 1011, the lubricating oil in the oil guide groove 1011 can flow along the oil guide groove 1011 under the action of gravity and enter the oil guide hole 1010. The oil guide hole 1010 can be connected to the lower end of the oil guide groove 1011 in the vertical direction.

[0167] For example, the oil guide groove 1011 can extend in a straight line. The cross-sectional shape of the oil guide groove 1011 can be U-shaped, thereby collecting more lubricating oil with higher efficiency. The cross-sectional shape of the oil guide groove 1011 can also be trapezoidal, square, triangular, semi-circular, etc., and this application embodiment does not specifically limit it in this way.

[0168] In some embodiments, there may be multiple oil guide holes 1010, which may be arranged at intervals around the third through hole 109; there may be multiple oil guide grooves 1011, which may be arranged one-to-one with the multiple oil guide holes 1010, so that lubricating oil can be introduced into the first bearing 220 from multiple directions at the same time to improve the lubrication effect of the first bearing 220.

[0169] Understandably, multiple oil guide grooves 1011 can be spaced apart on the isolation wall 106 to guide lubricating oil adhering to different positions on the isolation wall 106 to the first bearing 220. The multiple oil guide grooves 1011 can be arranged in parallel, or the multiple oil guide grooves 1011 can be arranged at relative angles.

[0170] For example, the extension direction of the oil guide groove 1011 can point towards the output shaft 210. For instance, the extension line of the oil guide groove 1011 along its extension direction can intersect the rotation axis of the output shaft 210. In this way, the path for the oil guide groove 1011 to guide the flow of lubricating oil can be shortened, thereby improving the lubrication efficiency of the first bearing 220.

[0171] Please refer to Figures 14 and 15, and in conjunction with Figures 1 to 3. In some embodiments, the oil guide hole 1010 is axially inclined relative to the output shaft 210, which can improve the smoothness of lubricating oil flow.

[0172] It is understood that the isolation wall 106 has a certain thickness, and the end of the oil guide hole 1010 that communicates with the oil guide groove 1011 is located on the side of the isolation wall 106 facing the second chamber 101b. The oil guide hole 1010 has a certain depth on the isolation wall 106, and the end of the oil guide hole 1010 that leads out the lubricating oil is located in the third through hole 109.

[0173] For example, the position of the end of the oil guide hole 1010 that communicates with the oil guide groove 1011 is higher than the position of the end of the oil guide hole 1010 facing the first bearing 220, so as to avoid the accumulation or blockage of lubricating oil in the oil guide hole 1010.

[0174] It should be noted that the oil guide hole 1010 can extend in a straight line. The output shaft 210 can extend in a horizontal direction. The included angle between the oil guide hole 1010 and the output shaft 210 can be 10°, 20°, 30°, 45°, 60°, 90°, etc., and this application embodiment does not specifically limit this.

[0175] Referring to Figures 14 and 15, and in conjunction with Figures 1 to 3, in one possible implementation, the housing assembly 100 may include a first housing 110 and a first end cap 115. The first housing 110 is configured to form a first chamber 101a, and a partition wall 106 is formed on the sidewall of the first housing 110 facing the first end cap 115. The first end cap 115 and the partition wall 106 enclose a second chamber 101b, thereby improving the ease of assembly of the housing assembly 100 and reducing production costs.

[0176] It is understood that the housing assembly 100 may also include a second end cap 116, which is connected to the end of the first housing 110 away from the first end cap 115. The second end cap 116 is used to limit, fix and protect the end of the motor assembly 200 away from the reducer assembly 300.

[0177] For example, the housing assembly 100 may further include a thermal management water jacket, which is disposed inside the first housing 110 and surrounds the motor assembly 200. A water flow channel can be formed between the thermal management water jacket and the inner wall of the first housing 110 for introducing cooling water to dissipate heat from the motor assembly 200 when it generates heat during operation. A second oil seal is provided at the end of the motor assembly 200 away from the reducer assembly 300. The second oil seal cooperates with the thermal management water jacket to allow lubricating oil from one end of the second end cap 116 to enter the first chamber 101a.

[0178] It should be noted that the motor assembly 200 may include a rotor and a stator, the stator being connected to the thermal management water channel and the rotor being connected to the output shaft 210.

[0179] Referring to Figures 14 and 15, and in conjunction with Figures 1 to 3, in some embodiments, the electric drive system 10 may further include a second bearing 370, which is located on the side of the first bearing 220 facing the second chamber 101b; the inner ring of the second bearing 370 is connected to the reducer assembly 300, and the outer ring of the second bearing 370 is connected to the isolation wall 106.

[0180] Understandably, the input end of the reducer assembly 300 is connected to the output shaft 210, and the reducer assembly 300 can be a planetary reducer or a parallel gear reducer. The second bearing 370 can improve the support stability of the reducer assembly 300, while ensuring good coaxiality between the motor output shaft 210 and the input end of the reducer assembly 300.

[0181] For example, the reducer assembly 300 can be a planetary reducer, and the electric drive system 10 can also include a drive shaft 500. The output shaft 210 has a through hole at both ends, and the drive shaft 500 passes through the through hole. The drive shaft 500 is connected to the reducer assembly 300 so that the input end and the output end of the reducer assembly 300 are coaxial, thereby improving the space utilization within the electric drive system 10 and reducing the overall volume of the electric drive system 10.

[0182] This application also provides a vehicle that may include the electric drive system 10 described above. The vehicle provided in this application can be a new energy vehicle, including but not limited to pure electric vehicles, hybrid electric vehicles, and hydrogen fuel cell vehicles; this application does not specifically limit its application in this regard.

[0183] The vehicle provided in this application embodiment has all the technical solutions and effects of the aforementioned electric drive system 10, which will not be repeated here.

[0184] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electric drive system, characterized in that, The electric drive system includes a first housing, a second housing, a motor assembly, a reducer assembly, and a controller assembly. The first housing has a first receiving cavity, and the motor assembly and the reducer assembly are both disposed within the first receiving cavity. The controller assembly is connected to the side of the second housing facing the first housing and is disposed together with the second housing on top of the first housing. The second housing has a first coolant passage configured to dissipate heat from the controller assembly; the first housing has a second coolant passage connected to the first coolant passage, configured to dissipate heat from the motor assembly.

2. The electric drive system according to claim 1, characterized in that, The second housing and the outer wall of the first housing form a second receiving cavity, and the controller assembly is located in the second receiving cavity; the inlet of the first coolant circuit is located on the side of the second housing, the outlet of the first coolant circuit is connected to the second receiving cavity, and the outlet of the first coolant circuit is connected to the inlet of the second coolant circuit.

3. The electric drive system according to claim 2, characterized in that, The first housing includes a housing body and a cooling water jacket. The cooling water jacket is disposed inside the first housing and is sleeved on the outside of the motor assembly. The outer wall of the cooling water jacket is provided with a water guide groove, which, together with the inner wall of the housing body, forms the second coolant passage.

4. The electric drive system according to claim 3, characterized in that, The cooling water jacket has annular sealing grooves at both ends along the axial direction, and a sealing ring is provided in the annular sealing groove. The sealing ring abuts against the inner wall of the first housing.

5. The electric drive system according to any one of claims 2-4, characterized in that, The first housing has a protrusion on its top outer side, and the circumferential edge of the second housing abuts against the protrusion; the outline shape of the protrusion matches the outline shape of the second housing; the protrusion forms a receiving groove around the outside of the first housing, and the second housing covers the receiving groove. The second housing has a sealing element on its circumferential edge; the sealing element abuts between the protrusion and the second housing; the other of the protrusion and the second housing has a sealing groove on its circumferential edge, and the sealing element is located in the sealing groove.

6. The electric drive system according to claim 5, characterized in that, The protrusion has a sealing surface arranged circumferentially around it, and the circumferential edge of the second housing abuts against the sealing surface; the assembly direction of the second housing relative to the first housing is perpendicular to the sealing surface.

7. The electric drive system according to claim 5, characterized in that, The protrusion has a first connecting portion on its circumferential edge, and the second housing has a second connecting portion on its circumferential edge. The first connecting portion and the second connecting portion are opposite to each other. The first connecting portion is fixedly connected to the second connecting portion by a fastener.

8. The electric drive system according to claim 5, characterized in that, The outer wall of the first housing has reinforcing ribs, which are connected to the side wall of the protrusion facing the interior of the receiving groove.

9. The electric drive system according to claim 5, characterized in that, The protrusion and the second housing are integrally formed.

10. The electric drive system according to any one of claims 2-4, characterized in that, The first receiving cavity includes a first chamber and a second chamber, with the motor assembly disposed in the first chamber and the reducer assembly disposed in the second chamber. The first chamber and the second chamber are arranged along a first direction; the assembly direction of the second housing relative to the first housing is a second direction; the first direction is perpendicular to the second direction.

11. The electric drive system according to claim 10, characterized in that, The reducer assembly includes a center gear, a first planetary gear, a second planetary gear, an internal gear ring, a planetary carrier, and a differential. The center gear meshes with the first planetary gear. The first planetary gear is rotatably connected to the planetary carrier. The first planetary gear and the second planetary gear are coaxially and fixedly connected. The second planetary gear meshes with the internal gear ring. The internal gear ring is connected to the first housing. The motor assembly includes a motor body and an output shaft. The motor body is configured to drive the output shaft to rotate. The output shaft is coaxially and fixedly connected to the center wheel. The planetary carrier is connected to the input end of the differential. The output end of the differential is coaxially connected to the output shaft.

12. The electric drive system according to claim 11, characterized in that, The differential includes a differential housing, a first differential gear, and a second differential gear. The planetary carrier is connected to the differential housing, and the first differential gear is also connected to the differential housing. The second differential gear meshes with the first differential gear. The second differential gear is coaxially arranged with the output shaft.

13. The electric drive system according to any one of claims 1-4, characterized in that, The controller assembly includes a power module and an electrical connector, the electrical connector being connected to the power module; the first housing has a first through hole on the side facing the second housing, the electrical connector passing through the first through hole and extending at least partially into the first receiving cavity, the electrical connector being connected to the motor assembly.

14. The electric drive system according to claim 13, characterized in that, The electrical connector includes an insulating sheath and three metal busbars. The insulating sheath is plastically wrapped around the outside of the three metal busbars. The first ends of the three metal busbars are respectively connected to the power module. The second ends of the three metal busbars are all inserted through the first through hole and connected to the motor assembly.

15. The electric drive system according to claim 14, characterized in that, Each of the three metal bars has a first connection structure at its first end, and the first connection structure is connected to the power module by fasteners; and / or, the insulating sheath has a second connection structure, and the second connection structure is fixedly connected to the housing by fasteners.

16. The electric drive system according to claim 14, characterized in that, The first housing has a mounting boss on the side facing the second housing, and the first through hole is provided in the mounting boss; the insulating sleeve is sealed to the mounting boss.

17. The electric drive system according to claim 16, characterized in that, The electrical connector further includes a sealing ring, which is circumferentially arranged around the insulating sheath; the mounting boss has a sealing surface, and the sealing ring abuts against the sealing surface.

18. The electric drive system according to claim 16, characterized in that, The controller assembly further includes a signal line; the signal line and the electrical connector are both passed through the first through hole; or, the mounting boss is provided with a second through hole, and the signal line passes through the second through hole.

19. The electric drive system according to claim 18, characterized in that, The insulating sheath is plastically wrapped around the outside of the signal line; or, the controller assembly further includes a seal that wraps around the outside of the signal line and is sealed to the mounting boss.

20. The electric drive system according to claim 11, characterized in that, An isolation wall is provided between the first chamber and the second chamber; a third through hole is provided on the isolation wall; the output shaft extends from the first chamber through the third through hole to the second chamber; The electric drive system also includes a first bearing, which is located between the output shaft and the inner wall of the third through hole; the isolation wall is provided with an oil guide hole, the first end of which communicates with the first chamber, and the second end of which is opposite to the first bearing.

21. The electric drive system according to claim 20, characterized in that, The second end of the oil guide hole is connected to the side of the first bearing facing the second chamber.

22. The electric drive system according to claim 21, characterized in that, The electric drive system further includes a first oil seal, which is located on the side of the first bearing facing the second chamber and abuts against the output shaft and the isolation wall; there is a gap between the first oil seal and the first bearing, and the second end of the oil guide hole communicates with the gap.

23. The electric drive system according to claim 20, characterized in that, An oil guide groove is provided on the side of the isolation wall facing the second chamber, and the first end of the oil guide hole is connected to the oil guide groove.

24. The electric drive system according to claim 23, characterized in that, There are multiple oil guide holes, which are arranged at intervals around the third through hole; there are multiple oil guide grooves, which are arranged one-to-one with the multiple oil guide holes.

25. The electric drive system according to claim 20, characterized in that, The oil guide hole is inclined relative to the axial direction of the output shaft.

26. The electric drive system according to claim 20, characterized in that, The electric drive system also includes a second bearing located on the side of the first bearing facing the second chamber; the inner ring of the second bearing is connected to the reducer assembly, and the outer ring of the second bearing is connected to the isolation wall.

27. The electric drive system according to claim 20, characterized in that, The electric drive system also includes a drive shaft, the output shaft has a through hole at both ends, and the drive shaft passes through the through hole; the drive shaft is connected to the reducer assembly.

28. A vehicle, characterized in that, Includes the electric drive system according to any one of claims 1-27.

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