Three-in-one powertrain system

Abstract

The present application relates to the technical field of vehicle control systems, and in particular to a three-in-one powertrain system. The three-in-one powertrain system includes a housing, a motor assembly, a reducer assembly, a controller, and a cooling system; the housing is a highly integrated housing, enabling the motor assembly, the reducer assembly, and the controller to be integrally installed within one housing, and connecting the output shaft of the reducer assembly to the motor assembly, and the controller is electrically connected to the motor assembly. The cooling system is located within the housing to cool down the heat-generating components of the motor assembly and the controller. Thus, through an integrated housing, not only can the motor assembly, the controller, and the reducer assembly be better matched and connected, but also effective thermal management can be carried out on all heat-generating components; at the same time, the weight of the whole machine is reduced, the manufacturing and processing procedures are reduced, the manufacturing and raw material costs are saved, and the whole machine has a smaller volume, which is more conducive to being mounted and matched on the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control systems, and more particularly to an integrated three-in-one powertrain system. Background Art

[0002] The vehicle powertrain system mainly includes a motor, a controller, and a reducer. Usually, the motor, the controller, and the reducer are all independently installed and have independent casings, that is, the three are non-integrated. When installing the three, not only will there be problems of poor matching and inability to fully utilize the performance of each component product, but also unnecessary material waste will be caused, increasing the weight of the whole machine. At the same time, the heat dissipation effect of the existing powertrain system is also poor. Summary of the Invention

[0003] The purpose of the present invention is to provide an integrated three-in-one powertrain system with good heat dissipation effect.

[0004] The present invention provides a three-in-one powertrain system, including a casing, a motor assembly, a reducer assembly, a controller, and a cooling system; the motor assembly, the reducer assembly, and the controller are integrally installed in the casing, and the reducer assembly is connected to the output end of the motor assembly, and the controller is electrically connected to the motor assembly; the cooling system is arranged in the casing, and the cooling system is used to cool down the motor assembly and the controller.

[0005] Further, the casing includes a motor housing, a reducer housing, and a controller housing; the reducer housing is connected to one end of the motor housing, the motor assembly is installed in the motor housing, and the output end of the motor assembly faces the reducer housing; the reducer assembly is installed in the reducer housing, and the reducer assembly is connected to the output end of the motor assembly; the controller housing is arranged on the side wall of the motor housing, and the controller is installed in the controller housing.

[0006] Further, the cooling system includes a spiral water channel; the motor assembly includes a motor stator, and the spiral water channel is arranged around the outer wall of the stator core of the motor stator; the casing is formed with a cooling water inlet and a cooling water outlet, one end of the spiral water channel is communicated with the cooling water inlet, and the other end of the spiral water channel is communicated with the cooling water outlet.

[0007] Further, the cooling system includes a heat dissipation plate; the controller housing is formed with a heat dissipation cavity, and the heat dissipation plate is located in the heat dissipation cavity; a heat dissipation water channel is formed in the heat dissipation plate, and the cooling water inlet, the heat dissipation water channel, the spiral water channel, and the cooling water outlet are sequentially communicated; the controller includes an IGBT module, and the IGBT module is installed on the heat dissipation plate.

[0008] Furthermore, the heat dissipation water channel is U-shaped, and heat dissipation ribs are formed on one side surface of the heat dissipation plate facing the inside of the heat dissipation cavity.

[0009] Furthermore, the cooling system includes a heat exchange oil sleeve, an oil pump, a first cooling oil sleeve, and a second cooling oil sleeve; the heat exchange oil sleeve is sleeved outside the spiral water channel, and a heat exchange oil channel is formed inside the heat exchange oil sleeve; a circulating oil layer is formed at one end of the machine shell close to the reducer assembly, and the inlet end of the heat exchange oil channel is connected to the circulating oil layer through the oil pump; the first cooling oil sleeve and the second cooling oil sleeve are respectively sleeved at both ends of the motor stator in the axial direction, so that the ends of the stator windings of the motor stator are located inside the cooling oil sleeves; the first cooling oil sleeve and the second cooling oil sleeve are respectively formed with an oil inlet and an oil outlet; the oil inlets of the first cooling oil sleeve and the second cooling oil sleeve are respectively connected to the outlet end of the heat exchange oil sleeve, and the oil outlets of the first cooling oil sleeve and the second cooling oil sleeve are both connected to the machine shell.

[0010] Furthermore, the heat exchange oil channel in the heat exchange oil sleeve is S-shaped, and heat exchange holes are provided on the heat exchange oil sleeve.

[0011] Furthermore, the first cooling oil sleeve is located at one end away from the reducer assembly, and a stator wiring embedded part is provided on the first cooling oil sleeve; the controller includes three-phase copper bars, and one end of the three-phase copper bars extends into the motor housing and is electrically connected to the stator wiring embedded part, so that the controller is electrically connected to the motor assembly through the three-phase copper bars.

[0012] Furthermore, the cooling system includes an oil guide pipe; the motor assembly includes a motor rotor; the motor rotor includes a hollow shaft, one end of the hollow shaft is rotatably connected to the motor housing, and the other end of the hollow shaft is connected to the reducer assembly; one end of the oil guide pipe is connected to the heat exchange oil channel, the other end of the oil guide pipe is inserted into the hollow shaft, and an oil injection port is provided at the end of the oil guide pipe located at one end of the hollow shaft; rotor oil outlets are formed at both ends of the hollow shaft corresponding to the rotor core of the motor rotor.

[0013] Furthermore, a filter screen pipe is provided at the inlet of the oil pump, and the outlet of the oil pump is connected to the inlet end of the heat exchange oil sleeve through an oil filter.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The three-in-one powertrain system provided by the present invention includes a housing, a motor assembly, a reducer assembly, a controller, and a cooling system. The motor assembly, the reducer assembly, and the controller are all integrally installed in the housing, and the output end of the motor assembly is connected to the reducer assembly; the controller is electrically connected to the motor assembly. The cooling system is integrally installed in the housing, and the cooling system can cool down the heat-generating components of the motor assembly and the controller. Thus, through an integrated housing, the motor assembly, the controller, the reducer assembly, and the cooling system are organically integrated and installed in one housing, which not only enables the motor assembly, the controller, and the reducer assembly to be better matched and connected, fully exerts the performance of each component product, and can effectively manage the heat of all heat-generating components; at the same time, it reduces the weight of the whole machine, reduces the manufacturing and processing procedures, saves the manufacturing and raw material costs, and makes the whole machine have a smaller volume, which is more conducive to being mounted and matched on the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the three-in-one powertrain system provided by the embodiment of the present invention;

[0018] Figure 2 It is an exploded structural diagram of the three-in-one powertrain system provided by the embodiment of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the heat exchange part of the controller of the three-in-one powertrain system provided by the embodiment of the present invention;

[0020] Figure 4 It is a schematic structural diagram of the heat exchange structure at the end of the motor stator of the three-in-one powertrain system provided by the embodiment of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the heat exchange structure of the motor rotor of the three-in-one powertrain system provided by the embodiment of the present invention.

[0022] Reference numerals:

[0023] 1 - Housing, 11 - Reducer housing, 12 - Motor housing, 13 - Controller housing, 14 - Motor rear cover, 2 - Motor stator, 21 - Spiral water channel; 22 - First cooling oil jacket, 23 - Second cooling oil jacket, 24 - End cover oil inlet, 25 - End cover oil outlet, 26 - Stator wiring embedded part, 27 - Cooling water inlet, 28 - Cooling water outlet, 29 - Heat exchange oil jacket, 3 - Motor rotor, 31 - Hollow shaft, 32 - Oil guide pipe, 33 - Oil injection port, 34 - Rotor oil outlet, 35 - End plate, 36 - Oil groove, 4 - Controller, 41 - IGBT module, 42 - Heat dissipation plate, 43 - Heat dissipation rib, 44 - Three-phase copper busbar, 45 - Heat dissipation cavity, 5 - Oil pump, 51 - Oil filter, 6 - Reducer assembly. Detailed implementation manners

[0024] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0025] Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention.

[0026] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] Refer to the following Figures 1 to 5 to describe a three-in-one powertrain system according to some embodiments of the present application.

[0030] The present application provides a three-in-one powertrain system (hereinafter referred to as the powertrain system), as Figure 1 and Figure 2 shown, including a housing 1, a motor assembly, a reducer assembly 6, and a controller 4; the housing 1 includes a motor housing 12, a reducer housing 11, and a controller housing 13. One end of the motor housing 12 is provided with a motor rear cover 14, and the other end of the motor housing 12 is an open end. The motor assembly is installed inside the motor housing 12, and the output end of the motor assembly faces the open end of the motor housing 12. The reducer housing 11 is located on one side of the open end of the motor housing 12, and the reducer housing 11 can be hermetically and firmly connected to the motor housing 12; the reducer assembly 6 is installed inside the reducer housing 11, and the reducer assembly 6 is connected to the output end of the motor assembly.

[0031] The controller housing 13 is arranged on the outer wall of the motor housing 12. Preferably, the controller housing 13 and the motor housing 12 are integrated; the controller 4 is installed inside the controller housing 13, and the controller 4 is electrically connected to the motor assembly. Preferably, the controller 4 includes a three-phase copper busbar 44 and an IGBT module 41. One end of the three-phase copper busbar 44 is connected to the IGBT module 41, and the other end of the three-phase copper busbar 44 can extend into the motor housing 12 and be electrically connected to the motor assembly, so as to realize the electrical connection between the controller 4 and the motor assembly through the IGBT module 41 and the three-phase copper busbar 44 integratedly installed in the controller housing 13.

[0032] In summary, for the powertrain system of the present application, through an integrated housing 1, the motor assembly, the controller 4, and the reducer assembly 6 are integrally installed on one housing 1, which not only enables the motor assembly, the controller 4, and the reducer assembly 6 to be better matched and connected, giving full play to the performance of each component product; at the same time, it also reduces the weight of the whole machine, reduces the manufacturing and processing procedures, saves manufacturing and raw material costs, and makes the whole machine have a smaller volume, which is more conducive to being mounted and matched on the vehicle.

[0033] In this embodiment, preferably, as Figures 2 to 5 shown, the powertrain system further includes a cooling system. The cooling system is integrally installed inside the housing 1, and the cooling system can perform heat exchange with the heat-generating components of the motor assembly and the controller 4 to cool down the heat-generating components of the motor assembly and the controller 4, and extend the service life of the powertrain system.

[0034] In an embodiment of the present application, preferably, as Figure 2 and Figure 3As shown, the cooling system includes a water-cooled heat exchange part, and the water-cooled heat exchange part includes a spiral water channel 21; the motor assembly includes a motor stator 2, and the spiral water channel 21 is wound around and wrapped on the outer wall of the stator core of the motor stator 2; a cooling water inlet 27 and a cooling water outlet 28 are formed on the housing 1 of the power assembly system. One end of the spiral water channel 21 is communicated with the cooling water inlet 27, and the other end of the spiral water channel 21 is communicated with the cooling water outlet 28. The external cooling water enters the spiral water channel 21 through the cooling water inlet 27, exchanges heat with the stator core, and finally flows out of the power assembly system through the cooling water outlet 28, so as to cool down the outer wall of the motor stator 2 through the spiral water channel 21.

[0035] In an embodiment of the present application, preferably, as Figure 3 shown, the water-cooled heat exchange system further includes a heat dissipation plate 42; the controller 4 includes an IGBT module 41, and the heat dissipation plate 42 is used to dissipate heat from the IGBT module 41. A heat dissipation cavity 45 is formed on the bottom wall of the controller housing 13, and the heat dissipation plate 42 is installed in the heat dissipation cavity 45; a cooling water channel is formed in the heat dissipation plate 42. One end of the cooling water channel is communicated with the cooling water inlet 27, and the other end of the cooling water channel extends into the motor housing 12 through a communication pipe and is communicated with the inlet end of the spiral water channel 21, that is, the cooling water inlet 27, the cooling water channel in the heat dissipation plate 42, the spiral water channel 21 and the cooling water outlet 28 are sequentially communicated. The IGBT module 41 is installed in the controller housing 13 and is located above the heat dissipation plate 42, so that heat can be exchanged between the heat dissipation plate 42 and the IGBT module 41 to cool down the IGBT module 41.

[0036] In this embodiment, preferably, the cooling water channel in the heat dissipation plate 42 is U-shaped, and heat dissipation ribs 43 are formed on the plate surface of one side of the heat dissipation plate 42 located in the heat dissipation cavity 45, so as to improve the heat exchange efficiency of the heat dissipation plate 42 for the IGBT module 41 and quickly cool down the IGBT module 41.

[0037] In an embodiment of the present application, preferably, as Figure 2 、 Figure 4 and Figure 5 shown, the cooling system further includes an oil-cooled heat exchange part, and the oil-cooled heat exchange part includes a circulating oil layer, an oil pump 5, a heat exchange oil sleeve 29, a first cooling oil sleeve 22 and a second cooling oil sleeve 23.

[0038] A certain amount of circulating oil is injected into the housing 1. When the power assembly system is installed in a vehicle, the axis direction of the output shaft of the power assembly system has a predetermined inclination angle with the horizontal direction, and one end provided with a speed reducer assembly 6 is located below; thus, when a certain amount of circulating oil is injected into the housing 1, the circulating oil will accumulate at the lowest part of the housing 1, that is, the lowest part of the speed reducer housing 11, under the action of gravity, and form a circulating oil layer with a certain liquid level height.

[0039] The heat exchange oil jacket 29 is formed with a heat exchange oil passage, an oil inlet and an oil outlet communicating with the heat exchange oil passage; as Figure 2 shown, the oil pump 5 is installed in the machine housing 1, and the inlet of the oil pump 5 extends into the circulating oil layer through a pipeline, and the outlet of the oil pump 5 communicates with the oil inlet of the heat exchange oil jacket 29, so that the circulating oil located below the machine housing 1 is pumped into the heat exchange oil jacket 29 through the oil pump 5. The heat exchange oil jacket 29 is sleeved outside the spiral water channel 21, so that the circulating oil in the heat exchange oil jacket 29 can exchange heat with the cooling water in the spiral water channel 21, and the circulating oil is cooled by the cooling water.

[0040] Preferably, the heat exchange oil passage is in an S shape, and heat exchange holes are formed in the heat exchange oil jacket 29, so as to improve the heat exchange efficiency between the circulating oil in the heat exchange oil jacket 29 and the cooling water in the spiral water channel 21.

[0041] As Figure 4 shown, the first cooling oil jacket 22 and the second cooling oil jacket 23 respectively cover both ends in the axial direction of the motor stator 2, and the stator windings at both ends of the motor stator 2 are covered in the first cooling oil jacket 22 and the second cooling oil jacket 23. The first cooling oil jacket 22 and the second cooling oil jacket 23 are respectively formed with an end cover oil inlet 24 located below and an end cover oil outlet 25 located above; the end cover oil inlets 24 of the first cooling oil jacket 22 and the second cooling oil jacket 23 respectively communicate with the oil outlet of the heat exchange oil jacket 29, and the circulating oil in the heat exchange oil jacket 29 can enter the two cooling oil jackets from the end cover oil inlets 24 below the first cooling oil jacket 22 and the second cooling oil jacket 23, and then flow out of the end cover oil outlets 25 above the two cooling oil jackets into the machine housing 1, and finally re-converge to the circulating oil layer located at the bottom of the machine housing 1 under the action of gravity; thus forming a circulation loop of the oil cooling and heat exchange part of the cooling system.

[0042] During the specific use process, the circulating oil located at the bottom of the machine housing 1 is pumped into the heat exchange oil jacket 29 by the oil pump 5. The heat exchange oil jacket 29 is sleeved outside the spiral water channel 21, and the circulating oil in the heat exchange oil jacket 29 exchanges heat with the cooling water in the spiral water channel 21 to cool the circulating oil; then the cooled circulating oil respectively enters the first cooling oil jacket 22 and the second cooling oil jacket 23 from below the first cooling oil jacket 22 and the second cooling oil jacket 23, and exchanges heat with the stator windings located in the two oil jackets to cool the stator windings at the ends of the motor stator 2, and finally flows out from above the two cooling oil jackets and returns to the machine housing 1 and converges under the action of gravity to the circulating oil layer located at the bottom of the machine housing 1; thus realizing the cooling of the ends of the motor stator 2.

[0043] In this embodiment, preferably, as Figure 2As shown, a filter pipe is provided at the inlet of the oil pump 5 to filter the circulating oil entering the oil pump 5; an oil filter 51 is provided at the outlet of the oil pump 5, and the outlet of the oil pump 5 is connected to the inlet end of the heat exchange oil jacket 29 through the oil filter 51 to filter the circulating oil through the oil filter 51, thereby extending the service life of the circulating oil. At the same time, it also reduces the wear of the power assembly system caused by impurities in the circulating oil and extends the service life of the power assembly system.

[0044] In this embodiment, preferably, as Figure 4 shown, a stator wiring embedded part 26 for electrically connecting with the controller 4 is provided on the first cooling oil jacket 22; specifically, the second cooling oil jacket 23 is located at one end close to the reducer assembly 6, that is, when the power assembly system is installed in a vehicle, the position of the first cooling oil jacket 22 is higher than that of the second cooling oil jacket 23; a stator wiring embedded part 26 is provided on the upper side of the end face of the first cooling oil jacket 22. One end of the three-phase copper row 44 of the controller 4 is connected to the IGBT module 41, and the other end of the three-phase copper row 44 extends into the motor housing 12 and is electrically connected to the stator wiring embedded part 26, thereby realizing the electrical connection between the controller 4 and the motor assembly.

[0045] In an embodiment of the present application, preferably, as Figure 5 shown, the oil-cooled heat exchange part of the cooling system further includes a guide oil pipe 32 for cooling the motor rotor 3 of the motor assembly. Preferably, one end of the output shaft of the motor rotor 3 is rotatably connected to the motor rear cover 14, and the other end of the output shaft is the output end and is connected to the reducer assembly 6 through the output end. The output shaft of the motor rotor 3 is a hollow shaft 31, and the end of the output shaft facing the motor rear cover 14 is an open end. One end of the hollow shaft 31 is fixedly connected to the motor rear cover 14, and the other end of the hollow shaft 31 extends into the hollow shaft 31. The end of the guide oil pipe 32 located outside the hollow shaft 31 is connected to the oil outlet of the heat exchange oil jacket 29, and an oil injection port 33 is provided on the outer wall of the end of the guide oil pipe 32 located inside the hollow shaft 31, and the oil injection port 33 is approximately located in the middle of the internal cavity of the hollow shaft 31; thus, the circulating oil in the heat exchange oil jacket 29 can enter the hollow shaft 31 through the guide oil pipe 32.

[0046] A rotor core is sleeved outside the hollow shaft 31, and an end plate 35 is provided at the end of the rotor core. An oil groove 36 is formed on the joint surface of the end plate 35 and the rotor core; corresponding to the joints between the two ends of the rotor core and the end plate 35, a rotor oil outlet 34 is provided on the side wall of the hollow shaft 31; when the motor rotor 3 rotates, under the action of high-speed centrifugal force, the circulating oil in the hollow shaft 31 will be thrown out through the rotor oil outlet 34. The circulating oil first enters the oil groove 36 through the gap between the end plate 35 and the end face of the rotor core, and then is thrown out of the motor rotor 3 through the oil groove 36 and finally returns to the circulating oil layer at the bottom of the machine shell 1; thus, the cooling and temperature reduction of the motor rotor 3 are realized.

[0047] In summary, the cooling system includes a water-cooled heat exchange part and an oil-cooled heat exchange part. The water-cooled heat exchange part is externally connected to cooling water, and the outer wall of the motor stator 2 and the heat-generating components of the controller 4 can be cooled down through the water-cooled heat exchange part; the oil-cooled heat exchange part is an internal circulation process. The circulating oil for circulation is located at the bottom of the machine shell 1. The circulating oil is pumped to the heat exchange oil sleeve 29 through the built-in oil pump 5, and the circulating oil in the heat exchange oil sleeve 29 is cooled down by the cooling water, and then the cooled-down circulating oil is respectively sent into the first cooling oil sleeve 22 and the second cooling oil sleeve 23 located at the end of the motor stator 2, and the hollow shaft 31 of the motor rotor 3 to cool down the end of the motor stator 2 and the motor rotor 3; thus, through the combined action of the water-cooled heat exchange part and the internally circulated oil-cooled heat exchange part, the heat-generating components of the powertrain system, mainly the motor rotor 3, the outer wall of the motor stator 2, the end of the motor stator 2, and the IGBT module 41 in the controller 4, are cooled down to ensure the normal operation of the powertrain system and extend the service life of the powertrain system.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and 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 invention.

Claims

1. A three-in-one powertrain system, characterized in that, It includes a housing, a motor assembly, a reducer assembly, a controller and a cooling system; The motor assembly, the reducer assembly and the controller are integrally installed in the housing, the reducer assembly is connected to the output end of the motor assembly, and the controller is electrically connected to the motor assembly; The cooling system is arranged in the housing and is used to cool down the motor assembly and the controller; The housing includes a motor housing, a reducer housing and a controller housing; One end of the motor housing is provided with a motor rear cover, the other end of the motor housing is an open end, the reducer housing is connected to the open end of the motor housing, the motor assembly is installed in the motor housing, and the output end of the motor assembly faces the reducer housing; The reducer assembly is installed in the reducer housing and is connected to the output end of the motor assembly; The controller housing is arranged on the side wall of the motor housing, and the controller is installed in the controller housing; The cooling system includes a spiral water channel; The motor assembly includes a motor stator, and the spiral water channel is arranged around the outer wall of the stator core of the motor stator; The housing is formed with a cooling water inlet and a cooling water outlet, one end of the spiral water channel is communicated with the cooling water inlet, and the other end of the spiral water channel is communicated with the cooling water outlet; The cooling system includes a heat exchange oil sleeve, an oil pump, a first cooling oil sleeve and a second cooling oil sleeve; The heat exchange oil sleeve is sleeved outside the spiral water channel, and a heat exchange oil channel is formed in the heat exchange oil sleeve; a circulating oil layer is formed at one end of the housing close to the reducer assembly, and the inlet end of the heat exchange oil channel is communicated with the circulating oil layer through the oil pump; The first cooling oil sleeve and the second cooling oil sleeve are respectively sleeved at both ends of the motor stator in the axial direction, so that the ends of the stator windings of the motor stator are located in the cooling oil sleeves; The first cooling oil sleeve and the second cooling oil sleeve are respectively formed with an oil inlet and an oil outlet; the oil inlets of the first cooling oil sleeve and the second cooling oil sleeve are respectively communicated with the outlet end of the heat exchange oil sleeve, and the oil outlets of the first cooling oil sleeve and the second cooling oil sleeve are both communicated with the housing; 2. The three-in-one powertrain system according to claim 1, characterized in that The cooling system includes a heat dissipation plate; The controller housing is formed with a heat dissipation cavity, and the heat dissipation plate is located in the heat dissipation cavity; A cooling water channel is formed in the heat dissipation plate, and the cooling water inlet, the cooling water channel, the spiral water channel and the cooling water outlet are sequentially communicated; The controller includes an IGBT module, and the IGBT module is installed on the heat dissipation plate; 3. The three-in-one powertrain system according to claim 2, characterized in that The cooling water channel is U-shaped, and heat dissipation ribs are formed on the side plate surface of the heat dissipation plate facing the inside of the heat dissipation cavity; 4. The three-in-one powertrain system according to claim 1, wherein The heat exchange oil channel in the heat exchange oil sleeve is S-shaped, and heat exchange holes are formed in the heat exchange oil sleeve; 5. The three-in-one powertrain system according to claim 1, characterized in that, The first cooling oil sleeve is located at the end far from the reducer assembly, and a stator wiring embedded part is arranged on the first cooling oil sleeve; The controller comprises a three-phase copper bar, one end of which extends into the motor housing and is electrically connected to the stator wiring embedded part, so that the controller is electrically connected to the motor assembly through the three-phase copper bar.

6. The three-in-one powertrain system according to claim 1, characterized in that, The cooling system includes an oil guide pipe; The motor assembly includes a motor rotor; the motor rotor includes a hollow shaft, one end of the hollow shaft is rotatably connected to the motor housing, and the other end of the hollow shaft is connected to the reducer assembly; One end of the oil guide pipe is connected to the heat exchange oil passage, the other end of the oil guide pipe is inserted into the hollow shaft, and an oil injection port is provided at the end of the oil guide pipe located at one end of the hollow shaft; Rotor oil outlets are formed at two ends of the hollow shaft corresponding to the rotor core of the motor rotor.

7. The three-in-one powertrain system according to claim 1, characterized in that The inlet of the oil pump is provided with a filter pipe, and the outlet of the oil pump is connected with the inlet end of the heat exchange oil jacket through an oil filter.

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