A multi-in-one electric drive system and electric vehicle

Abstract

The application discloses a multi-in-one electric drive system and an electric vehicle, which comprises a motor reducer integrated assembly and an electric drive controller integrated assembly located directly above the half shaft of the motor reducer integrated assembly. The electric drive controller integrated assembly comprises a shell, a motor controller module, a bus capacitor and a filter module located in a lower sealed cavity of the shell, a power supply module and a high-voltage power distribution module located in an upper sealed cavity of the shell, and a first cooling system. The motor controller module is arranged in parallel with the bus capacitor, and the filter module is installed on the top surface of the bus capacitor. The first cooling system comprises a first cooling part and a second cooling part. The first cooling part is installed in the power supply module, the second cooling part is installed above the motor controller module and below the power supply module, and the first cooling part and the second cooling part are in communication. The multi-in-one electric drive system has the advantages of compact structure, high integration degree and small overall volume, and can be adapted to the front drive scheme arrangement and the rear drive scheme arrangement of the vehicle.

Description

Technical Field

[0001] This application relates to the technical field of electric vehicles, and more specifically, to an all-in-one electric drive system and an electric vehicle. Background Technology

[0002] High-voltage drive and power components, such as motor controllers, motors, reducers, on-board chargers, DC-DC converters, and high-voltage junction boxes, are core components of pure electric vehicles, and their importance has become increasingly prominent with the development of new energy vehicles. However, these components are often scattered, occupying most of the vehicle's space, and fixing and connecting these high-voltage components requires many auxiliary parts, such as mounting brackets, high and low voltage wiring harnesses, and cooling water pipes. Integrating these high-voltage drive or power devices together can increase the number of shared components and reduce the number of connecting parts, thereby significantly reducing the overall vehicle layout space and lowering the cost of electric drive and the entire vehicle. However, integrated multi-drive systems often have large dimensions in all directions, and multi-drive systems are often not suitable for rear-wheel drive layouts, thus failing to adapt to existing mainstream high-performance rear-wheel drive platforms.

[0003] Chinese Patent CN110682800A discloses an integrated electric drive system assembly and an electric vehicle, achieving lightweighting and integration of the assembly. The assembly includes: a reducer, a drive motor, a high-voltage junction box, a motor controller, and a power supply module. The reducer is housed within a reducer housing; the drive motor is housed within a stator housing, and the stator housing and reducer housing share the same end cover; the transmission input shaft of the reducer and the rotor shaft of the drive motor are coaxially connected through the end cover; an electronic control housing is planar with the reducer housing and the stator housing; the power supply module and the high-voltage junction box are located on the upper side of the electronic control housing, and the motor controller is located on the lower side of the electronic control housing; the high-voltage junction box connects the motor controller and the power supply module and provides power to the vehicle's compressor and heater; the motor controller is connected to the drive motor; the electronic control housing is fixedly connected to the reducer housing and / or the stator housing. The entire assembly structure does not make full use of the space above the electronic control housing. Although the overall height is reduced, the length in the forward direction of the vehicle is relatively large, which increases the difficulty of layout. At the same time, the electronic control housing is located at the rear, which is not conducive to the installation and fixation of the rear swing bracket. Therefore, this patent is not suitable for rear-wheel drive layout. Summary of the Invention

[0004] To address at least one aspect of the aforementioned problems, the present invention provides an all-in-one electric drive system, comprising an integrated electric drive controller assembly and an integrated motor reducer assembly. The integrated electric drive controller assembly is detachably disposed directly above the half-shaft of the integrated motor reducer assembly. The integrated electric drive controller assembly includes a housing, a motor controller module, a bus capacitor, a filter module, a power supply module, a high-voltage power distribution module, and a first cooling system. The housing includes a casing, an upper cover plate, and a lower cover plate. The upper and lower cover plates are detachably connected to the top and bottom surfaces of the casing, respectively. A partition is fixedly disposed inside the casing, such that the upper cover plate, lower cover plate, and casing form an upper and lower sealed cavity distributed vertically. The controller module, bus capacitor, and filter module are all installed in the lower sealed cavity. The motor controller module is arranged parallel to the bus capacitor, and the filter module is installed on the top surface of the bus capacitor. The power supply module and the high-voltage distribution module are both installed in the upper sealed cavity, and the high-voltage distribution module is installed on the side of the power supply module. The first cooling system includes a water inlet, a first cooling section, a second cooling section, and a water outlet. The first cooling section is installed inside the power supply module, and the second cooling section is installed above the motor controller module and below the power supply module. The water inlet penetrates the side wall of the enclosure and communicates with the first cooling section. The first cooling section communicates with the second cooling section, and the water outlet penetrates the side wall of the enclosure and communicates with the second cooling section.

[0005] Through the above technical solution, the upper and lower cover plates of the housing are designed to be detachably connected to the housing body, forming a housing with an upper and lower sealed cavity. The power module and high-voltage power distribution module are electrically integrated in the upper sealed cavity, while the motor controller module, bus capacitor module, and filter module are electrically integrated in the lower sealed cavity. This helps improve the assemblability and maintenance convenience of the electric drive controller integrated assembly. By designing a first cooling section located inside the power module and a second cooling section located above the power module to be connected, the first cooling system can simultaneously cool the electrical components in both the upper and lower sealed cavities, greatly reducing the size of the electric drive controller integrated assembly in all directions and reducing the use of auxiliary parts, thereby helping to save costs. By mounting the electric drive controller integrated assembly directly above the half-shaft, the space above the half-shaft is fully utilized, thereby helping to reduce the volume of the multi-in-one electric drive system of this application, which can be adapted to both front-wheel drive and rear-wheel drive layouts. Therefore, the multi-in-one electric drive system of this application has a compact structure, high integration, and small overall size, and can be adapted to both front-wheel drive and rear-wheel drive vehicles.

[0006] Preferably, the integrated motor-reducer assembly includes a first end cover, a motor body, a common housing, a second cooling system, a reducer body, and a second end cover. The motor body includes an oil-cooled stator and rotor. The motor body is electrically connected to the motor controller module and to the reducer body. The motor body, reducer body, and second cooling system are all installed within the common housing. The first and second end covers are detachably connected to opposite ends of the common housing. This technical solution integrates the motor and reducer together, sharing the first end cover, common housing, and second end cover, which helps reduce the overall volume of the motor and reducer. By using an oil-cooled stator and rotor, a smaller stator and rotor with a smaller diameter and length are used while maintaining power and performance, thus helping to reduce the integrated volume of the motor-reducer assembly.

[0007] Preferably, the common housing is a single-layer structure; the second cooling system includes an oil trough located on the inner wall of the common housing, and an oil pump is installed on the common housing. When the motor uses an oil-cooled stator and rotor, the above technical solution discloses the specific structure of the second cooling system. The oil trough on the inner wall of the common housing facilitates oil flow, achieving joint cooling of the motor and reducer. Furthermore, the common housing wall can be made of a single layer, which helps reduce the diameter and weight of the common housing, thereby reducing the volume and weight of the integrated motor-reducer assembly.

[0008] Preferably, the second cooling system further includes an oil-water heat exchanger, which is installed at the top of the outer wall of the common housing; an oil supply pipe is connected to the common housing, with one end of the oil supply pipe and the water outlet both connected to the oil-water heat exchanger. Through the above technical solution, the all-in-one electric drive system of this application also integrates an oil-water heat exchanger, achieving the effect of cooling the oil in the motor reducer assembly through water discharged from the electric drive controller integrated assembly, which helps to further improve the integration level of this application.

[0009] Preferably, the diameter of the oil-cooled stator and rotor is smaller than the inner diameter of the common housing, and the axial dimension of the common housing is larger than the axial dimension of the oil-cooled stator and rotor. By designing the oil-cooled stator and rotor and the common housing as an interference fit, the diameter of the common housing can be further reduced. The axial space reserved for the oil-cooled stator and rotor within the common housing allows for adjustment of the length of the oil-cooled stator and rotor, thereby enabling the expansion of the power and torque of the multi-functional electric drive system of this application.

[0010] Preferably, the reducer body includes a first-stage gear, a second-stage gear, a third-stage gear, and a fourth-stage gear; all four gears are mounted within a common housing. The first-stage gear is coaxially and fixedly connected to the oil-cooled stator and rotor; the second-stage and third-stage gears are coaxially and fixedly connected, and rotatably connected to the common housing, with the second-stage gear meshing with the first-stage gear; the fourth-stage gear is rotatably connected to the common housing, meshing with the third-stage gear, and is used to connect to the half-shaft. This technical solution discloses the specific structure of the reducer, utilizing multi-stage gears to achieve motor-driven speed reduction of the half-shaft, which helps improve drive stability.

[0011] Preferably, the partition above the motor controller module has a double-layer structure. A first groove is formed on the bottom surface of the upper partition, and a second groove is formed on the top surface of the lower partition. The first groove and the second groove correspond to each other and are fixedly connected to form a second cooling section. The above technical solution discloses the specific structure of the second cooling section. Utilizing the gap between the motor controller module and the power module to form the second cooling section helps to reduce the volume of the integrated electric drive controller assembly.

[0012] Preferably, the first cooling section is a horizontally arranged U-shaped pipe, and it overlaps with the heat-generating power devices inside the power module. The above technical solution discloses the specific structure of the first cooling section. Designing the first cooling section as U-shaped and installing it inside the power module helps ensure the cooling effect of the power module and maintains a small size.

[0013] Preferably, the power drive board and control board of the motor controller module and the bus capacitor are of a common board structure. By designing the motor controller and bus capacitor as a common board structure, the height of the integrated motor controller and bus capacitor can be reduced.

[0014] This application also provides an electric vehicle, including any of the above-described multi-drive systems and a front drive axle or a rear drive axle; the multi-drive system is connected to the front drive axle or the rear drive axle.

[0015] The all-in-one electric drive system and electric vehicle of the present invention have the following beneficial effects:

[0016] (1) By electrically integrating the power supply module and the high voltage distribution module in the upper sealed cavity, and electrically integrating the motor controller module, the bus capacitor module and the filter module in the lower sealed cavity, the first cooling section is set in the gap between the partition plate between the motor controller module and the power supply module, and the second cooling section is designed as a U-shape and installed inside the power supply module. The first cooling section and the second cooling section are connected, so that the first cooling system cools the electrical components in the upper sealed cavity and the lower sealed cavity at the same time, realizing the high integration of the electric drive controller integrated assembly and ensuring that the electric drive controller integrated assembly has a small volume.

[0017] (2) By integrating the motor and reducer together and opening an oil groove on their common housing, the motor and reducer can be cooled together. By designing the common housing as a single-layer structure and using the common housing to press against the oil-cooled stator and rotor, the volume of the motor and reducer integration can be reduced.

[0018] (3) By mounting the electric drive controller assembly directly above the half-shaft where the motor reducer is integrated, the space above the half-shaft is fully utilized, thereby helping to reduce the size of the all-in-one electric drive system of this application, which can be adapted to both front-wheel drive and rear-wheel drive layouts. Therefore, the all-in-one electric drive system of this application has a compact structure, high integration, and small overall size, and can be adapted to both front-wheel drive and rear-wheel drive layouts of automobiles. Attached Figure Description

[0019] To better understand the above and other objects, features, advantages, and functions of the present invention, reference can be made to the embodiments shown in the accompanying drawings. The same reference numerals in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of the invention and do not limit the scope of the invention in any way; the parts in the drawings are not drawn to scale.

[0020] Figure 1 A schematic diagram of the structure of an all-in-one electric drive system according to an embodiment of the present invention is shown;

[0021] Figure 2 This diagram shows a structural schematic of an all-in-one electric drive system according to an embodiment of the present invention from another angle.

[0022] Figure 3 An exploded view of an all-in-one electric drive system and electric vehicle according to an embodiment of the present invention is shown;

[0023] Figure 4 A schematic diagram of the structure of an all-in-one electric drive system and a first cooling system of an electric vehicle according to an embodiment of the present invention is shown;

[0024] Figure 5 A topology diagram of an electric vehicle according to an embodiment of the present invention is shown;

[0025] Figure 6 A schematic diagram of the structure of an electric vehicle according to an embodiment of the present invention is shown.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Electric drive controller integrated assembly; 111. Top cover; 112. Housing; 1121. Fixing part; 113. Bottom cover; 12. Motor controller module; 13. Bus capacitor; 14. Filter module; 15. Power supply module; 16. High voltage power distribution module; 17. First cooling system; 171. Water inlet; 172. First cooling section; 173. Second cooling section; 174. Connection part; 175. Water outlet; 18. AC charging interface; 19. High voltage distribution interface; 110. High voltage input interface; 2. Motor reducer integrated assembly; 21. First end cover; 211. High-pressure cover plate; 212. Three-phase copper busbar; 213. Three-phase terminal block; 22. Oil-cooled stator and rotor; 23. Common housing; 241. First stage gear; 242. Second stage gear; 243. Third stage gear; 244. Fourth stage gear; 25. Second end cover; 251. Differential interface; 26. Oil-water heat exchanger; 261. Connecting pipe; 262. Water outlet interface; 27. Oil pump; 28. Motor resolver connector; 29. ​​Breath plug; 3. Half shaft; 4. Rear drive axle; 51. First connecting post; 52. Second connecting post. Detailed Implementation

[0028] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0029] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0030] To at least partially solve one or more of the above-mentioned problems and other potential problems, one embodiment of this disclosure proposes an all-in-one electric drive system, including an electric drive controller integrated assembly 1 and a motor reducer integrated assembly 2. The electric drive controller integrated assembly 1 is detachably disposed directly above the half-shaft 3 of the motor reducer integrated assembly 2. The electric drive controller integrated assembly 1 includes a housing, a motor controller module 12, a bus capacitor 13, a filter module 14, a power supply module 15, a high-voltage power distribution module 16, and a first cooling system 17. The housing includes a box body 112, an upper cover plate 111, and a lower cover plate 113. The upper cover plate 111 and the lower cover plate 113 are detachably connected to the top and bottom surfaces of the box body 112, respectively. A partition is fixedly disposed inside the box body 112, so that the upper cover plate 111, the lower cover plate 113, and the box body 112 form an upper sealed cavity and a lower sealed cavity distributed vertically. Motor controller module 12, bus capacitor 13, and filter module 14 are all installed in the lower sealed cavity. Motor controller module 12 is arranged parallel to bus capacitor 13, and filter module 14 is installed on the top surface of bus capacitor 13. Power supply module 15 and high-voltage power distribution module 16 are both installed in the upper sealed cavity. High-voltage power distribution module 16 is installed on the side of power supply module 15. The first cooling system 17 includes inlet 171, first cooling section 172, second cooling section 173, and outlet 175. First cooling section 172 is installed inside power supply module 15, and second cooling section 173 is installed above motor controller module 12 and below power supply module 15. Inlet 171 penetrates the side wall of housing 112 and communicates with first cooling section 172. First cooling section 172 communicates with second cooling section 173. Outlet 175 penetrates the side wall of housing 112 and communicates with second cooling section 173.

[0031] Specifically, such as Figures 1 to 4As shown, the electric drive controller integrated assembly 1 includes a housing, a motor controller module 12, a bus capacitor 13, a filter module 14, a power supply module 15, a high-voltage power distribution module 16, and a first cooling system 17. The housing includes a box 112, an upper cover plate 111, and a lower cover plate 113. The upper cover plate 111 and the lower cover plate 113 are respectively matched with the top and bottom surfaces of the box 112. The edges of the upper cover plate 111, the top surface of the box 112, the bottom surface of the lower cover plate 113, and the bottom surface of the box 112 are detachably connected by several bolts. A partition is fixedly installed inside the box 112, so that the upper cover plate 111, the lower cover plate 113, and the box 112 form an upper sealed cavity and a lower sealed cavity distributed vertically. The motor controller module 12, the bus capacitor 13, and the filter module 14 are all installed in the lower sealed cavity. The motor controller module 12 is a silicon carbide motor controller module, and the bus capacitor 13 is preferably 30~ A 40mm thin-film bus capacitor 13 is used. The motor controller module 12 is arranged parallel to the bus capacitor 13. Preferably, the power drive board and control board of the motor controller module 12 and the bus capacitor 13 are of the same board structure. The filter module 14 is installed on the top surface of the bus capacitor 13, which helps to ensure that the lower sealing cavity has a small height. The power module 15 and the high-voltage distribution module 16 are both installed in the upper sealing cavity. The power module 15 adopts a DC power conversion and on-board charger combined module. The high-voltage distribution module 16 is installed on the side of the power module 15. An AC charging interface 18, a high-voltage distribution interface 19 and a high-voltage input interface 110 are respectively plugged into the side of the outer wall of the housing 112. The AC charging interface 18 is electrically connected to the power module 15, the high-voltage distribution interface 19 is electrically connected to the high-voltage distribution module 16, and the high-voltage input interface 110 is electrically connected to the power module 15, the motor controller module 12 and the high-voltage distribution module 16.

[0032] like Figure 4As shown, the first cooling system 17 includes an inlet 171, a first cooling section 172, a second cooling section 173, a connecting section 174, and an outlet 175. The first cooling section 172 is located on the top surface of the partition and installed inside the power module 15. Preferably, the first cooling section 172 is a horizontally arranged U-shaped pipe, and the first cooling section 172 overlaps with the heat-generating power devices inside the power module 15. The second cooling section 173 is flat and is installed above the motor controller module 12 and below the power module 15. Preferably, the partition above the motor controller module 12 has a double-layer structure, with a first groove on the bottom surface of the upper partition and a first groove on the top surface of the lower partition. A second groove is provided on the surface, and the first groove corresponds to and is fixedly connected to form a second cooling section 173; the water inlet 171 penetrates the side wall of the housing 112 and communicates with the first cooling section 172, and the first cooling section 172 is connected to the second cooling section 173 through the connecting part 174; the water outlet 175 penetrates the side wall of the housing 112 and communicates with the second cooling section 173. Preferably, the section of the water inlet 171 located inside the housing, the section of the connecting part 174 and the section of the water outlet 175 located inside the housing are also located in the gap of the partition. The first groove located on the bottom surface of the upper partition and the second groove located on the top surface of the lower partition are arranged along the direction of the water inlet 171, the connecting part 174 and the water outlet 175.

[0033] The integrated motor reducer assembly 2 includes a first end cover 21, a motor body, a common housing 23, a second cooling system, a reducer body, and a second end cover 25. The motor body, reducer body, and second cooling system are all installed inside the common housing 23. The first end cover 21 and the second end cover 25 are detachably connected to opposite ends of the common housing 23 by bolts. The motor body includes an oil-cooled stator and rotor 22, which are rotatably mounted inside the common housing 23. Preferably, the diameter of the oil-cooled stator and rotor 22 is smaller than the inner diameter of the common housing 23, and the axial dimension of the common housing 23 is larger than the axial dimension of the oil-cooled stator and rotor 22. The motor body and the motor controller module 12 are electrically connected. Specifically, a high-voltage cover plate 211 is detachably connected to the side of the first end cover 21 away from the common housing 23 by bolts, so that a cavity is formed inside the first end cover 21. A three-phase copper busbar 212 and a three-phase terminal block 213 are fixedly installed in the cavity. The three-phase copper busbar 212 is electrically connected to the motor controller module 12, and the three-phase copper busbar 212 is fixedly connected to the three-phase terminal block 213. The three-phase terminal block 213 is electrically connected to the motor body. A motor resolver connector 28 is connected to the outer wall of the common housing 23, and the motor resolver connector 28 is electrically connected to the motor body.

[0034] The motor body is connected to the reducer body. Preferably, the reducer body includes a first-stage gear 241, a second-stage gear 242, a third-stage gear 243, and a fourth-stage gear 244; the first-stage gear 241, second-stage gear 242, third-stage gear 243, and fourth-stage gear 244 are all installed between the common housing 23 and the second end cover 25. Figure 3 As shown, the first-stage gear 241 is coaxially and fixedly connected to the oil-cooled stator and rotor 22 via a connecting shaft. The connecting shaft of the first-stage gear 241 is rotatably connected to the common housing 23 and the second end cover 25 via bearings. The second-stage gear 242 and the third-stage gear 243 are coaxially and fixedly connected, and the connecting shaft passing through the second-stage gear 242 and the third-stage gear 243 is rotatably connected to the common housing 23 and the second end cover 25 via bearings. The second-stage gear 242 meshes with the first-stage gear 241. The connecting shaft of the fourth-stage gear 244 is rotatably connected to the common housing 23 and the second end cover 25 via bearings. The fourth-stage gear 244 meshes with the third-stage gear 243 and is used to connect to the half-shaft 3, as shown. Figure 2 As shown; a differential interface 251 is provided on the second end cover 25, and the differential interface 251 corresponds to the connecting shaft of the fourth gear 244; a first connecting post 51 and a second connecting post 52 are fixedly connected to the corresponding positions of the first end cover 21 and the second end cover 25, and the axes of the first connecting post 51 and the second connecting post 52 are parallel to the axis of the cylindrical section of the common housing 23.

[0035] In some embodiments, the common housing 23 is a single-layer structure; the second cooling system includes an oil tank and an oil-water heat exchanger 26. The oil tank is formed on the inner wall of the common housing 23 for oil flow; the oil-water heat exchanger 26 is installed at the top of the outer wall of the common housing 23, and a connecting pipe 261 is fixed and connected to the outlet 175. One end of the connecting pipe 261 is fixed and connected to the oil-water heat exchanger 26. The oil-water heat exchanger 26 is provided with an outlet 262 and an oil inlet. An oil supply pipe is connected to the common housing 23, and one end of the oil supply pipe is connected to the oil-water heat exchanger 26, so that the water discharged from the electric drive controller integrated assembly 1 is cooled by the oil-water heat exchanger 26 and input into the common housing 23; an oil pump 27 is installed on the common housing 23.

[0036] Fixing parts 1121 are respectively provided at the four top corners of the outer wall of the housing 112, such as Figure 1 and Figure 2 As shown, the four fixing parts 1121 are detachably connected to the two ends along the axial direction of the top of the outer wall of the cylindrical section of the common housing 23, the end of the top of the first end cover 21 away from the cylindrical section of the common housing 23, and the end of the top of the second end cover 25 away from the cylindrical section of the common housing 23 by bolts, so that the electric drive controller integrated assembly 1 can be detachably positioned directly above the half shaft 3 of the motor reducer integrated assembly 2, as shown. Figure 2As shown, the space above the half-shaft 3 is fully utilized, which helps to reduce the size of the all-in-one electric drive system of this application.

[0037] This application also provides an electric vehicle, such as Figure 5 and Figure 6 As shown, it includes any of the above-described multi-drive electric systems and a front drive axle or a rear drive axle 4; the multi-drive electric system is connected to the front drive axle or the rear drive axle 4; in this embodiment, as... Figure 5 As shown, the all-in-one electric drive system is connected to the rear drive axle 4 via the first connecting post 51 and the second connecting post 52.

[0038] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand this document.

Claims

1. An all-in-one electric drive system, characterized in that: It includes an electric drive controller integrated assembly (1) and a motor reducer integrated assembly (2), with the electric drive controller integrated assembly (1) being detachably mounted directly above the half shaft (3) of the motor reducer integrated assembly (2); The electric drive controller integrated assembly (1) includes a housing, a motor controller module (12), a bus capacitor (13), a filter module (14), a power supply module (15), a high-voltage power distribution module (16), and a first cooling system (17); The housing includes a box (112), an upper cover plate (111), and a lower cover plate (113); the upper cover plate (111) and the lower cover plate (113) are detachably connected to the top and bottom surfaces of the box (112), respectively; a partition is fixedly installed inside the box (112), so that the upper cover plate (111), the lower cover plate (113), and the box (112) form an upper sealing cavity and a lower sealing cavity distributed vertically. The motor controller module (12), bus capacitor (13) and filter module (14) are all installed in the lower sealed cavity. The motor controller module (12) is arranged in parallel with the bus capacitor (13), and the filter module (14) is installed on the top surface of the bus capacitor (13). The power module (15) and the high voltage distribution module (16) are both installed in the upper sealed cavity, and the high voltage distribution module (16) is installed on the side of the power module (15); The first cooling system (17) includes an inlet (171), a first cooling section (172), a second cooling section (173), and an outlet (175). The first cooling section (172) is installed inside the power module (15) and is a horizontally arranged U-shaped pipe. The first cooling section (172) is connected to the heat-generating power devices inside the power module (15). The second cooling section (173) is installed above the motor controller module (12) and below the power module (15). The partition above the controller module (12) has a double-layer structure. A first groove is provided on the bottom surface of the upper partition and a second groove is provided on the top surface of the lower partition. The first groove and the second groove correspond to each other and are fixedly connected to form a second cooling section (173). The water inlet (171) penetrates the side wall of the box body (112) and communicates with the first cooling section (172). The first cooling section (172) communicates with the second cooling section (173). The water outlet (175) penetrates the side wall of the box body (112) and communicates with the second cooling section (173).

2. The all-in-one electric drive system according to claim 1, characterized in that: The motor reducer integrated assembly (2) includes a first end cover (21), a motor body, a common housing (23), a second cooling system, a reducer body, and a second end cover (25). The motor body includes an oil-cooled stator and rotor (22). The motor body is electrically connected to the motor controller module (12) and connected to the reducer body. The motor body, the reducer body, and the second cooling system are all installed in the common housing (23). The first end cover (21) and the second end cover (25) are detachably connected to opposite ends of the common housing (23).

3. The all-in-one electric drive system according to claim 2, characterized in that: The common housing (23) is a single-layer structure; the second cooling system includes an oil tank, which is opened on the inner wall of the common housing (23), and an oil pump (27) is installed on the common housing (23).

4. The all-in-one electric drive system according to claim 3, characterized in that: The second cooling system also includes an oil-water heat exchanger (26), which is installed at the top of the outer wall of the common shell (23); an oil pipe is connected to the common shell (23), and one end of the oil pipe and the outlet (175) are connected to the oil-water heat exchanger (26).

5. The all-in-one electric drive system according to claim 2, characterized in that: The diameter of the oil-cooled stator and rotor (22) is smaller than the inner diameter of the common housing (23), and the axial dimension of the common housing (23) is larger than the axial dimension of the oil-cooled stator and rotor (22).

6. The all-in-one electric drive system according to claim 2, characterized in that: The reducer body includes a first-stage gear (241), a second-stage gear (242), a third-stage gear (243), and a fourth-stage gear (244). The first-stage gear (241), second-stage gear (242), third-stage gear (243), and fourth-stage gear (244) are all installed in a common housing (23). The first-stage gear (241) is coaxially and fixedly connected to the oil-cooled stator and rotor (22). The second-stage gear (242) and third-stage gear (243) are coaxially and fixedly connected, and rotatably connected to the common housing (23). The second-stage gear (242) meshes with the first-stage gear (241). The fourth-stage gear (244) is rotatably connected to the common housing (23). The fourth-stage gear (244) meshes with the third-stage gear (243) and is used to connect to the half-shaft (3).

7. The all-in-one electric drive system according to claim 1, characterized in that: The power drive board and control board of the motor controller module (12) and the bus capacitor (13) are of the same board structure.

8. An electric vehicle, characterized in that: Includes an all-in-one electric drive system as described in any one of claims 1 to 7, and a front drive axle or a rear drive axle (4); the all-in-one electric drive system is connected to the front drive axle or the rear drive axle (4).

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