Electric drive system and vehicle

Abstract

The utility model provides an electric drive system and a vehicle, and relates to the technical field of electric drive. The electric drive system comprises a first shell, a second shell, a motor assembly, a speed reducer assembly and a controller assembly, the first shell is provided with a first containing cavity, and the motor assembly and the speed reducer assembly are both arranged in the first containing cavity; the controller assembly is connected to the side, facing the first shell, of the second shell, and the controller assembly and the second shell are arranged above the first shell in a covering mode. The second shell is provided with a first cooling liquid path, and the first cooling liquid path is configured to dissipate heat of the controller assembly; and a second cooling liquid path is arranged in the first shell, the second cooling liquid path communicates with the first cooling liquid path, and the second cooling liquid path is configured to dissipate heat of the motor assembly, so that the space occupation of the electric drive system is reduced, and the weight of the electric drive system is reduced.

Description

Technical Field

[0001] The present application relates to the field of electric drive technology, and in particular to an electric drive system and a vehicle. Background Art

[0002] With the rapid popularization of new energy vehicles, electric drive systems are rapidly developing towards high power density, low cost, high integration, and high efficiency. Under this trend, high power density requires high power and compact size of the motor.

[0003] In related technologies, the electric drive system of a new energy vehicle typically integrates a motor and a reducer. The motor's output shaft cooperates with the reducer, reducing the motor's rotational speed and outputting power. Both the motor and reducer are mounted within the electric drive system's housing, while the controller is separately housed within the controller housing. This housing must be sealed to ensure it meets the required protection level, and then the controller housing is assembled and connected to the electric drive system housing.

[0004] However, the overall structure of the current electric drive system takes up a large space and is heavy. Utility Model Content

[0005] The present application provides an electric drive system and a vehicle to solve the technical problem that the overall structure of the current electric drive system occupies a large space and is heavy.

[0006] In the first aspect, the present application provides an electric drive system, which includes a first shell, a second shell, a motor assembly, a reducer assembly and a controller assembly. The first shell has a first accommodating cavity, and the motor assembly and the reducer assembly are both arranged in the first accommodating cavity; the controller assembly is connected to the side of the second shell facing the first shell, and is covered together with the second shell on top of the first shell.

[0007] The second shell has a first cooling liquid path, which is configured to dissipate heat for the controller component; a second cooling liquid path is provided in the first shell, which is connected to the first cooling liquid path, and is configured to dissipate heat for the motor component.

[0008] The electric drive system provided in the embodiment of the present application integrates the controller component, the motor component and the reducer component, and the cooling of the controller component and the cooling of the motor component share a water path, thereby reducing the space occupied by the electric drive system and reducing the weight of the electric drive system.

[0009] In one possible implementation, the second shell and the outer wall of the first shell are arranged to form a second accommodating cavity, and the controller component is located in the second accommodating cavity; the water inlet of the first cooling liquid circuit is located on the side of the second shell, the water outlet of the first cooling liquid circuit is connected to the second accommodating cavity, and the water outlet of the first cooling liquid circuit is connected to the water inlet of the second cooling liquid circuit.

[0010] In one possible implementation, the first shell may include a shell body and a cooling water jacket, the cooling water jacket is arranged in the first shell, and the cooling water jacket is arranged on the outside of the motor assembly; the outer wall of the cooling water jacket is provided with a water guide groove, and the water guide groove and the inner wall of the shell body are surrounded to form a second cooling liquid path.

[0011] In a possible implementation, annular sealing grooves are provided at both ends of the cooling water jacket in the axial direction. A sealing ring is provided in the annular sealing groove, and the sealing ring abuts against the inner wall of the first shell.

[0012] In one possible implementation, a protrusion is provided on the outer side of the top of the first shell, and the circumferential edge of the second shell abuts the protrusion; a seal is provided on the circumferential edge of the second shell; and the seal abuts between the protrusion and the second shell.

[0013] In a possible implementation, the protrusion and the second shell may be an integrally formed part.

[0014] In one possible implementation, the reducer assembly may include a center wheel, a first planetary wheel, a second planetary wheel, an inner ring gear, a planetary carrier and a differential, wherein the center wheel is engaged with the first planetary wheel; the first planetary wheel is rotatably connected to the planetary carrier; the first planetary wheel is coaxially fixedly connected with the second planetary wheel, the second planetary wheel is engaged with the inner ring gear; and the inner ring gear is connected to the first housing.

[0015] Among them, 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 fixedly connected to the center wheel; the planetary bracket is connected to the input end of the differential; the output end of the differential is coaxially arranged with the output shaft.

[0016] In one possible implementation, the differential may include a differential housing, a first differential gear and a second differential gear, the planet carrier is connected to the differential housing, the first differential gear is connected to the differential housing; the second differential gear is meshed with the first differential gear; and the second differential gear is coaxially connected to the output shaft.

[0017] In one possible implementation, the controller component may include a power module and an electrical connector, which is connected to the power module; a first through hole is provided on the side of the first shell facing the second shell, the electrical connector is passed through the first through hole and extends at least partially into the first accommodating cavity, and the electrical connector is connected to the motor component.

[0018] In a second aspect, the present application provides a car comprising the electric drive system in the above technical solution.

[0019] The present application provides an electric drive system and vehicle, wherein 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 accommodating cavity, and the motor assembly and the reducer assembly are both disposed within the first accommodating cavity. The controller assembly is connected to the side of the second housing facing the first housing, and together with the second housing, is disposed above the first housing. The second housing has a first cooling liquid path, which is configured to dissipate heat from the controller assembly. A second cooling liquid path is disposed within the first housing, which is connected to the first cooling liquid path and configured to dissipate heat from the motor assembly, thereby reducing the space occupied by the electric drive system and reducing the weight of the electric drive system.

[0020] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the electric drive system and vehicle provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A schematic diagram of the structure of the electric drive system provided in an embodiment of the present application;

[0023] Figure 2 A cross-sectional view of an electric drive system provided in an embodiment of the present application;

[0024] Figure 3 An exploded diagram of the electric drive system provided in an embodiment of the present application;

[0025] Figure 4 A schematic structural diagram of the second housing in the electric drive system provided in an embodiment of the present application;

[0026] Figure 5 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 the present application;

[0027] Figure 6A schematic diagram of the cooperation between the electrical connector and the first housing in the electric drive system provided in an embodiment of the present application;

[0028] Figure 7 A schematic structural diagram of the reducer assembly in the electric drive system provided in an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 10-Electric drive system;

[0031] 101 - first accommodating chamber; 101a - first chamber; 101b - second chamber; 102 - second accommodating chamber; 103 - accommodating groove; 104 - raised portion; 105 - first through hole; 106 - partition wall; 110 - first housing; 111 - housing body; 112 - cooling water jacket; 113 - annular sealing groove; 114 - sealing ring; 120 - second housing; 121 - sealing element; 130 - first cooling liquid path; 140 - second cooling liquid path;

[0032] 200-motor assembly; 210-output shaft;

[0033] 300 - reducer assembly; 310 - center gear; 320 - first planetary gear; 330 - second planetary gear; 340 - inner ring gear; 350 - planetary carrier; 360 - differential; 361 - first differential gear; 362 - second differential gear; 363 - differential housing;

[0034] 400-controller assembly; 410-power module; 420-electrical connector;

[0035] 500-Drive shaft. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art may adjust them as needed to suit specific applications.

[0038] Secondly, it should be noted that in the description of this application, terms such as "front", "back", "left", "right", "up", "down", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships 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, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0039] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present 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 any one or more embodiments or examples.

[0041] Currently, the electric drive systems of new energy vehicles are rapidly developing toward high power density, low cost, high integration, and high efficiency. This trend requires high power density and compact motors. The electric drive systems of new energy vehicles typically integrate a motor and a reducer. The motor's output shaft works with the reducer, reducing the motor's rotation and outputting power. The motor and reducer are both mounted in the electric drive system's housing, while the controller is separately installed in the controller housing. The controller housing must be sealed to ensure it meets the required protection level, and then the controller housing is assembled and connected to the electric drive system housing.

[0042] However, since the controller is installed separately in an independent shell space, the controller shell is installed on the motor shell after the overall assembly and testing of the controller is completed. The existing structure and space on the motor shell cannot be utilized. The controller and motor need to be equipped with separate cooling systems respectively, resulting in the overall structure of the electric drive system occupying a large space and being heavy.

[0043] In response to the above-mentioned problems, an embodiment of the present application provides an electric drive system and a vehicle. By integrating a controller component, a motor component, and a reducer component, the cooling of the controller component and the cooling of the motor component share a water path, thereby reducing the space occupied by the electric drive system and reducing the weight of the electric drive system.

[0044] The technical solution of this application will be described in detail below through specific embodiments.

[0045] Figure 1 A schematic diagram of the structure of the electric drive system provided in an embodiment of the present application; Figure 2 A cross-sectional view of an electric drive system provided in an embodiment of the present application; Figure 3 An exploded diagram of the electric drive system provided in an embodiment of the present application;

[0046] Figure 4 A schematic structural diagram of the second housing in the electric drive system provided in an embodiment of the present application; Figure 5 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 the present application; Figure 6 A schematic diagram of the cooperation between the electrical connector and the first housing in the electric drive system provided in an embodiment of the present application; Figure 7 A schematic structural diagram of the reducer assembly in the electric drive system provided in an embodiment of the present application.

[0047] like Figures 1 to 7 As shown, an embodiment of the present application provides an electric drive system 10, which includes a first shell 110, a second shell 120, a motor assembly 200, a reducer assembly 300 and a controller assembly 400. The first shell 110 has a first accommodating cavity 101, and the motor assembly 200 and the reducer assembly 300 are both arranged in the first accommodating cavity 101. The controller assembly 400 is connected to the side of the second shell 120 facing the first shell 110, and is covered on the top of the first shell 110 together with the second shell 120.

[0048] The second housing 120 has a first cooling liquid path 130 configured to dissipate heat from the controller assembly 400. A second cooling liquid path 140 is provided within the first housing 110 and communicates with the first cooling liquid path 130. The second cooling liquid path 140 is configured to dissipate heat from the motor assembly 200.

[0049] 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 first installed on the second housing 120, and then the second housing 120 with the controller assembly 400 installed is placed on the first housing 110 to complete the assembly and sealing of the controller assembly 400.

[0050] The first housing 110 provides a mounting structure and accommodation space for the motor assembly 200, and a portion of the structure on the second housing 120 is integrated with the second housing 120 to provide an accommodation cavity space for the controller assembly 400. The housing for the controller assembly 400 can utilize a portion of the structure of the first housing 110, thereby allowing the controller assembly 400 to be integrated with the motor assembly 200 during assembly.

[0051] It should be noted that in the electric drive system 10 provided in the embodiment of the present application, by integrating the controller component 400, the motor component 200 and the reducer component 300, the cooling of the controller component 400 and the cooling of the motor component 200 share a water circuit, thereby reducing the space occupied by the electric drive system 10 and reducing the weight of the electric drive system 10.

[0052] Please continue to refer to Figures 1 to 7 In one possible implementation, the second housing 120 and the outer wall of the first housing 110 enclose a second accommodating cavity 102, and the controller assembly 400 is located in the second accommodating cavity 102. The water inlet of the first cooling liquid circuit 130 is located on the side of the second housing 120, and the water outlet of the first cooling liquid circuit 130 communicates with the second accommodating cavity 102. The water outlet of the first cooling liquid circuit 130 is connected to the water inlet of the second cooling liquid circuit 140.

[0053] It can be understood that the first cooling liquid circuit 130 may include a cooling water trough on the side of the second shell 120 facing the first shell 110, and the controller component 400 can be in contact with the outer wall of the cooling water trough. The cooling water entering the cooling water trough can absorb the heat of the controller component 400 through heat conduction, thereby cooling the controller component 400.

[0054] 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 within the first housing 110 and sleeved onto the outside of the motor assembly 200. The outer wall of the cooling water jacket 112 is provided with a water guide groove, which, together with the inner wall of the housing body 111, forms a second cooling liquid path 140.

[0055] 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 cooling liquid path 140 flows in a spiral direction around the outer circumference of the motor assembly 200 along the water guide groove, increasing the contact area of ​​the cooling water, extending the cooling time, and improving the cooling efficiency.

[0056] In some embodiments, annular sealing grooves 113 are provided at both ends of the cooling water jacket 112 along the axial direction. A sealing ring 114 is provided in the annular sealing groove 113 , and the sealing ring 114 abuts against the inner wall of the first shell 110 .

[0057] It can be understood that the sealing ring 114 can prevent the cooling water from leaking into the first shell 110 .

[0058] For example, the sealing ring 114 may be made of elastic materials such as rubber and silicone, which is not specifically limited in the embodiment of the present application.

[0059] For example, two or more sealing rings 114 may be respectively provided at both ends of the cooling water jacket 112 , and each sealing ring 114 is disposed in a sealing groove on the outer wall of the cooling water jacket 112 , thereby achieving better sealing performance.

[0060] Please continue to refer to Figures 1 to 7 In one possible implementation, a raised portion 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 raised portion 104 ; a seal 121 is provided on the circumferential edge of the second housing 120 . The seal 121 abuts between the raised portion 104 and the second housing 120 .

[0061] It is understood that the raised portion 104 can be annular in shape at the top of the first housing 110. The first housing 110 is placed on the raised portion 104 above the first housing 110 from above the second housing 120. The circumferential edge of the second housing 120 is in contact with the raised portion 104. When the second housing 120 is connected to the raised portion 104, the controller assembly 400 is at least partially located within the receiving groove 103 formed by the raised portion 104.

[0062] For example, the seal 121 can be bonded to the circumferential edge of the second housing 120 by a sealant. The stepped structure of the top inner edge of the raised portion 104 allows the second housing 120 to abut against the raised portion 104 when the second housing 120 is connected and assembled with the first housing 110, and the seal 121 is compressed between the second housing 120 and the top of the raised portion 104, thereby achieving a good sealing effect.

[0063] It should be noted that the protrusion 104 and the second housing 120 can be integrally formed. The first housing 110 and the second housing 120 can be made of metal or alloy such as iron or aluminum. The specific material of the first housing 110 and the second housing 120 is not limited in this embodiment.

[0064] In one possible implementation, the reducer assembly 300 may include a center wheel 310, a first planetary wheel 320, a second planetary wheel 330, an inner ring gear 340, a planetary carrier 350 and a differential 360, the center wheel 310 is engaged with the first planetary wheel 320, the first planetary wheel 320 is rotatably connected to the planetary carrier 350, the first planetary wheel 320 is coaxially fixedly connected with the second planetary wheel 330, the second planetary wheel 330 is engaged with the inner ring gear 340, and the inner ring gear 340 is connected to the first housing 110.

[0065] 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. The output shaft 210 is coaxially fixedly connected to the center gear 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.

[0066] It will be appreciated that when the motor is operating, the motor body drives the output shaft 210 to rotate, which in turn drives the center gear 310 to rotate. The center gear 310, in turn, meshes with the first planetary gears 320, driving the first planetary gears 320 to rotate. Because the first and second planetary gears 320 and 330 are coaxially connected, the first planetary gears 320 can drive the second planetary gears 330 to rotate synchronously and revolve around the inner ring gear 340. The first and second planetary gears 320 and 330 are rotatably connected to the planet carrier 350. As the first and second planetary gears 320 and 330 revolve, the planet carrier 350 rotates axially around the center gear 310 and transmits power to the differential 360.

[0067] In some embodiments, the differential 360 may include a differential housing 363, a first differential gear 361 and a second differential gear 362, the planetary carrier 350 is connected to the differential housing 363, the first differential gear 361 is connected to the differential housing 363; the second differential gear 362 is meshed with the first differential gear 361; and the second differential gear 362 is coaxially connected to the output shaft 210.

[0068] It is understood that the output shaft 210, the ring gear 340, the planetary carrier 350, and the differential housing 363 are all coaxially arranged. When the planetary carrier 350 rotates about the axial direction of the output shaft 210, it drives the differential housing 363 to rotate. The differential housing 363 drives the first differential gear 361 to revolve about the axial direction of the ring gear 340. The first differential gear 361 drives the second differential gear 362 to rotate, and the second differential gear 362 rotates. The second differential gear 362 can output power to the outside of the electric drive system 10.

[0069] For example, the electric drive system 10 may further include a transmission shaft 500. The output shaft 210 has communication holes extending through both ends, and the transmission shaft 500 is disposed through the communication holes. The transmission shaft 500 is connected to the 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 size of the electric drive system 10.

[0070] It should be noted that since the differential housing 363 is connected to the planetary bracket 350, the differential housing 363 can be located in the middle position of the reducer assembly 300, and the differential 360 can utilize the axial space of the reducer assembly 300 without being arranged on the side of the reducer gear, thereby reducing the space occupied by the reducer assembly 300 in the accommodating cavity.

[0071] In some embodiments, the first accommodating chamber 101 includes a first chamber 101a and a second chamber 101b, which are arranged along a first direction. The second housing 120 is assembled in a second direction relative to the first housing 110. The first direction is perpendicular to the second direction.

[0072] The first direction may be a horizontal direction, and the second direction may be a vertical direction.

[0073] 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. The output shaft 210 extends from the first chamber 101a through the first through hole 105 to the second chamber 101b and docks with the reducer assembly 300. The output power of the motor assembly 200 is transmitted to the reducer assembly 300 through the output shaft 210. Lubricating oil is injected into the second chamber 101b. When the electric drive system 10 is working, the lubricating oil can lubricate the reducer assembly 300. The partition wall 106 can prevent the lubricating oil thrown up by the reducer assembly 300 from entering the first chamber 101a, thereby ensuring the cleanliness of the working environment of the motor assembly 200.

[0074] In one possible implementation, the controller component 400 may include a power module 410 and an electrical connector 420, and the electrical connector 420 is connected to the power module 410; a first through hole 105 is provided on the side of the first shell 110 facing the second shell 120, and the electrical connector 420 is passed through the first through hole 105 and extends at least partially into the first accommodating cavity 101, and the electrical connector 420 is connected to the motor assembly 200.

[0075] It can be understood that when assembling the electric drive system 10, the controller assembly 400 can be installed on the shell assembly first, that is, the electrical connector 420 is first installed on the shell assembly. When the shell assembly is assembled and enclosed to form the second accommodating 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 the need to separately assemble the electrical connector 420 from the outside of the shell assembly after the controller assembly 400 is assembled.

[0076] It should be noted that in the electric drive system 10 provided in the embodiment of the present application, the housings of the motor assembly 200 and the controller assembly 400 are integrated through the structural design of the housing assembly, and a through hole is provided between the housings of the two for passing the electrical connector 420, thereby eliminating the need to open an installation port on the side of the housing, thereby simplifying the assembly process of the electrical connection and improving the sealing performance of the space where the electrical components are located.

[0077] The present invention also provides a vehicle that can include the electric drive system 10 of the above technical solution. The vehicle provided in the present invention can be a new energy vehicle, including but not limited to a pure electric vehicle, a hybrid electric vehicle, a hydrogen-powered vehicle, etc., which is not specifically limited in the present invention.

[0078] The vehicle provided in the embodiment of the present application has all the technical solutions and all the technical effects of the aforementioned electric drive system 10, which will not be repeated here.

[0079] The present application provides an electric drive system 10 and a vehicle, wherein the electric drive system 10 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 accommodating chamber 101, in which the motor assembly 200 and the reducer assembly 300 are both disposed. 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, is disposed above the first housing 110. The second housing 120 has a first cooling liquid path 130, which is configured to dissipate heat from the controller assembly 400. A second cooling liquid path 140 is disposed within the first housing 110 and communicates with the first cooling liquid path 130. The second cooling liquid path 140 is configured to dissipate heat from the motor assembly 200, thereby reducing the space occupied by the electric drive system 10 and reducing the weight of the electric drive system 10.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric drive system (10), characterized in that: The electric drive system (10) comprises 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 accommodating cavity (101), the motor assembly (200) and the reducer assembly (300) are both arranged in the first accommodating cavity (101); the controller assembly (400) is connected to a side of the second housing (120) facing the first housing (110), and is covered together with the second housing (120) on the top of the first housing (110); The second housing (120) has a first cooling liquid circuit (130), and the first cooling liquid circuit (130) is configured to dissipate heat for the controller component (400); a second cooling liquid circuit (140) is provided in the first housing (110), and the second cooling liquid circuit (140) is connected to the first cooling liquid circuit (130), and the second cooling liquid circuit (140) is configured to dissipate heat for the motor component (200).

2. The electric drive system (10) according to claim 1, characterized in that The second shell (120) and the outer wall of the first shell (110) are arranged to form a second accommodating cavity (102), and the controller component (400) is located in the second accommodating cavity (102); the water inlet of the first cooling liquid circuit (130) is located on the side of the second shell (120), the water outlet of the first cooling liquid circuit (130) is connected to the second accommodating cavity (102), and the water outlet of the first cooling liquid circuit (130) is connected to the water inlet of the second cooling liquid circuit (140).

3. The electric drive system (10) according to claim 2, characterized in that The first shell (110) includes a shell body (111) and a cooling water jacket (112), wherein the cooling water jacket (112) is arranged in the first shell (110) and is sleeved on the outside of the motor assembly (200); a water guide groove is provided on the outer wall of the cooling water jacket (112), and the water guide groove and the inner wall of the shell body (111) are surrounded to form the second cooling liquid path (140).

4. The electric drive system (10) according to claim 3, characterized in that The cooling water jacket (112) is provided with annular sealing grooves (113) at both ends along the axial direction. A sealing ring (114) is provided in the annular sealing groove (113). The sealing ring (114) abuts against the inner wall of the first shell (110).

5. The electric drive system (10) according to any one of claims 1 to 4, characterized in that: A protrusion (104) is provided on the outer side of the top of the first shell (110), and the circumferential edge of the second shell (120) abuts against the protrusion (104); a sealing member (121) is provided on the circumferential edge of the second shell (120); and the sealing member (121) abuts between the protrusion (104) and the second shell (120).

6. The electric drive system (10) according to claim 5, characterized in that The protrusion (104) and the second shell (120) are integrally formed.

7. The electric drive system (10) according to any one of claims 1 to 4, characterized in that: The reducer assembly (300) includes a center wheel (310), a first planet wheel (320), a second planet wheel (330), an inner gear (340), a planet carrier (350), and a differential (360). The center wheel (310) is meshed with the first planet wheel (320); the first planet wheel (320) is rotatably connected to the planet carrier (350); the first planet wheel (320) is coaxially fixedly connected to the second planet wheel (330); the second planet wheel (330) is meshed with the inner gear (340); and the inner gear (340) is connected to the first housing (110). The motor assembly (200) comprises a motor body and an output shaft (210), wherein the motor body is configured to drive the output shaft (210) to rotate, and the output shaft (210) is coaxially fixedly connected to the center wheel (310); the planetary carrier (350) is connected to the input end of the differential (360); and the output end of the differential (360) is coaxially connected to the output shaft (210).

8. The electric drive system (10) according to claim 7, characterized in that The differential (360) includes a differential housing (363), a first differential gear (361) and a second differential gear (362); the planetary carrier (350) is connected to the differential housing (363); the first differential gear (361) is connected to the differential housing (363); the second differential gear (362) is meshed with the first differential gear (361); and the second differential gear (362) is coaxially arranged with the output shaft (210).

9. The electric drive system (10) according to any one of claims 1 to 4, characterized in that: The controller component (400) includes a power module (410) and an electrical connector (420), wherein the electrical connector (420) is connected to the power module (410); a first through hole (105) is provided on a side of the first shell (110) facing the second shell (120), and the electrical connector (420) is passed through the first through hole (105) and at least partially extends into the first accommodating cavity (101); and the electrical connector (420) is connected to the motor component (200).

10. A vehicle, characterized in that: The electric drive system (10) comprises the electric drive system (10) according to any one of claims 1 to 9.

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