Powertrain and vehicle

Abstract

The application provides a power system and a vehicle. The power system comprises an engine, a shell, a driving motor assembly and a generator assembly. The shell forms a first accommodating space and a second accommodating space. The second accommodating space at least partially surrounds the first accommodating space. The driving motor assembly is arranged in the first accommodating space. The generator assembly is arranged in the second accommodating space. The generator assembly surrounds the outer periphery of the driving motor assembly. The engine is in driving connection with the generator assembly. In the application, the generator assembly and the driving motor assembly are arranged in the same shell, so that the integrated design of the generator assembly and the driving motor assembly can be realized, thereby reducing the space occupied by the power system. In addition, the generator assembly surrounds the outer periphery of the driving motor assembly, so that the size of the power system in the axial direction of the driving motor assembly can be further reduced, thereby further reducing the space occupied by the power system. Thus, the arrangement of the whole vehicle can be facilitated.

Description

Technical Field

[0001] This application relates to the field of vehicle powertrain technology, and particularly to a powertrain system and a vehicle. Background Technology

[0002] Currently, pure electric vehicles are gaining popularity among consumers due to their environmental friendliness, low operating costs, and superior driving experience. However, range anxiety remains a major pain point for pure electric vehicles due to limitations in battery energy density. Therefore, range-extended electric vehicles (REEVs) have become a widely accepted solution. A REEV consists of a range extender and a drive motor. The drive motor propels the vehicle, while the range extender generates electricity by consuming fuel, which can then charge the battery or directly power the drive motor. REEVs can effectively alleviate range anxiety for consumers.

[0003] Range-extended vehicles in related technologies occupy a large space due to their power systems, which include engines, generators, and drive motors, causing inconvenience to the overall vehicle layout. Utility Model Content

[0004] This application provides a power unit and vehicle designed to reduce the space occupied by the power system, thereby facilitating the overall vehicle layout.

[0005] The specific technical solution is as follows: An embodiment of the first aspect of this application provides a power system including an engine, a housing, a drive motor assembly, and a generator assembly. The housing forms a first receiving space and a second receiving space, the second receiving space at least partially surrounding the first receiving space. The drive motor assembly is disposed in the first receiving space, and the generator assembly is disposed in the second receiving space, the generator assembly being disposed around the outer periphery of the drive motor assembly. The engine is drive-connected to the generator assembly.

[0006] In the power system of this embodiment, the housing forms a first receiving space and a second receiving space, with the second receiving space at least partially surrounding the first receiving space. A drive motor assembly is disposed in the first receiving space, and a generator assembly is disposed in the second receiving space. This arrangement allows the generator assembly and the drive motor assembly to be arranged within the same housing, enabling integrated design of the generator assembly and the drive motor assembly, thereby reducing the space occupied by the power system. Furthermore, with the generator assembly and the drive motor assembly arranged within the same housing, the generator assembly is arranged around the outer periphery of the drive motor assembly. This allows for a further reduction in the axial dimension of the power system in the drive motor assembly direction, further reducing the space occupied by the power system. This provides convenience for the overall vehicle layout.

[0007] In some embodiments, the drive motor assembly includes a drive motor stator and a drive motor rotor, the drive motor rotor being located inside the drive motor stator; the generator assembly includes a generator stator and a generator rotor, the generator rotor being disposed around the generator stator; the housing includes a first housing portion, a second housing portion, and a connecting plate, the first housing portion defining a first receiving space, the second housing portion being disposed around the outer periphery of the second housing portion, the first housing portion being connected to the second housing portion via the connecting plate, the first housing portion, the second housing portion, and the connecting plate jointly defining a second receiving space; wherein, both the drive motor stator and the generator stator are fixedly connected to the first housing portion.

[0008] This configuration creates a first accommodating space within the housing to house the drive motor assembly and a second accommodating space to house the generator assembly. The drive motor assembly includes a stator and a rotor, with the rotor located inside the stator, resulting in an inner rotor arrangement. The generator assembly includes a stator and a rotor, with the rotor surrounding the stator, resulting in an outer rotor arrangement. This inner rotor arrangement of the drive motor assembly and the outer rotor arrangement of the generator assembly facilitates the fixed connection of both the drive motor stator and the generator stator to the first housing section. Since the first housing section needs to provide mounting positions for the drive motor stator and generator stator and ensure their operational stability, its wall thickness needs to be relatively thick to achieve better structural strength. The second housing section, not bearing the stator structure, can be relatively thinner. In other words, only one of the first and second housing sections needs a thicker wall, which helps control the overall radial dimensions of the housing, resulting in a more compact structure.

[0009] In some embodiments, the engine includes a crankshaft connected to the generator rotor. The direct connection of the generator rotor to the engine crankshaft eliminates intermediate structures such as flywheels and shock absorbers found in related technologies, thereby reducing the weight of the transmission system and production costs.

[0010] In some embodiments, the generator rotor includes a rotor body and a connecting member. The connecting member includes a first end plate and a first side plate. The first side plate is annular. The first end plate is located at one end of the first side plate and connected to the first side plate. The rotor body is fixed to the inner side of the first side plate. The first end plate is connected to the crankshaft.

[0011] The generator rotor includes a rotor body and connecting components. The connecting components include a first end plate and a first side plate. The rotor body is fixed to the inner side of the first side plate. The first end plate is connected to the crankshaft, thereby realizing the transmission connection between the crankshaft and the rotor body. This allows the engine to drive the rotor body of the generator rotor to rotate through the crankshaft to generate electrical energy when the engine is working.

[0012] In some embodiments, the crankshaft has an end face with a positioning protrusion, the first end plate has a positioning opening and a plurality of through holes, the first end plate abuts against the end face, the positioning protrusion cooperates with the positioning opening, and the first end plate and the crankshaft are also fastened together by a plurality of bolts passing through the through holes.

[0013] The crankshaft has a locating protrusion on its end face, and the first end plate has a locating opening. When installing the first end plate to the crankshaft, the locating opening can be engaged with the locating protrusion first, thereby positioning the first end plate using the locating protrusion and the locating opening. Then, the bolts for connecting the first end plate and the crankshaft are installed. Therefore, the locating protrusion and locating opening facilitate the installation process of the first end plate and the crankshaft, thus improving installation efficiency.

[0014] In some embodiments, the housing is fixedly connected to the engine. That is, the housing is fixedly connected to the engine, which improves the positional stability of the housing relative to the engine, thereby enhancing the operational stability of the range extender. Additionally, it also improves the power system's ability to withstand external impacts, preventing malfunctions caused by relative structural displacement under impact.

[0015] In some embodiments, the housing includes a first housing portion, a second housing portion, and a connecting plate. The first housing portion defines a first receiving space, and the second housing portion is disposed around the outer periphery of the second housing portion. The first housing portion is connected to the second housing portion via the connecting plate. The first housing portion, the second housing portion, and the connecting plate together define the second receiving space. The second housing portion is fixedly connected to the engine.

[0016] This configuration creates a first accommodating space within the housing to house the drive motor assembly and a second accommodating space to house the generator assembly. The second housing portion is then fixedly connected to the engine, thus achieving a fixed connection between the housing and the engine.

[0017] In some embodiments, the first housing portion includes a second side plate and a second end plate. The second side plate is annular and is connected to the second housing portion via the connecting plate. The second end plate is located at one end of the second side plate and is connected to the second side plate. The drive motor assembly includes a drive motor stator and a drive motor rotor. The drive motor rotor is also connected to the second end plate via a bearing.

[0018] The first housing includes a second side plate and a second end plate. The second side plate is annular, and the second end plate is located at one end of the second side plate and connected to it. This allows the first housing to be integrally formed into a cylindrical structure, the internal space of which constitutes a first accommodating space for housing the drive motor assembly. Furthermore, the drive motor rotor is connected to the second end plate via bearings. This improves the stability of the drive motor rotor during rotation, preventing positional deviations during rotation. This benefits both the lifespan of the drive motor assembly and reduces noise during operation.

[0019] In some embodiments, the power system further includes a lubrication assembly, which includes an oil pump, a lubrication oil passage, and an oil injection structure. The lubrication oil passage includes a main oil passage and multiple branch oil passages. Each branch oil passage is provided with an oil injection structure. The multiple branch oil passages include a first branch oil passage. The first branch oil passage and the oil injection structure located thereon are used to spray lubrication oil onto the generator assembly. The first branch oil passage is provided with a solenoid valve.

[0020] In pure electric drive mode, the drive motor assembly operates while the engine and generator assembly remain inactive; in this mode, the solenoid valve is closed. In range-extending mode, the engine drives the generator assembly; in this mode, the solenoid valve opens, and lubricating oil is sprayed onto the generator assembly to dissipate heat.

[0021] An embodiment of the second aspect of this application provides a vehicle that includes the power system of any of the above embodiments.

[0022] The vehicle in this embodiment is based on the same inventive concept as the power system in the above embodiments. Therefore, the vehicle in this embodiment can obtain the beneficial effects of the power system in the corresponding embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the power system provided in one embodiment of the present application; Figure 2 This is a three-dimensional structural diagram of a power system provided in an embodiment of this application; Figure 3A schematic diagram of the power system provided in one embodiment of this application from another perspective (the engine is hidden in the figure, and only the crankshaft is shown). Figure 4 A cross-sectional schematic diagram of a power system provided in an embodiment of this application; Figure 5 An exploded view of a power system provided in an embodiment of this application; Figure 6 A schematic diagram of the structure of the housing provided in one embodiment of this application; Figure 7 A cross-sectional schematic diagram of the housing provided in one embodiment of this application; Figure 8 This is a schematic diagram illustrating the connection relationship between the generator rotor and the crankshaft according to an embodiment of this application; Figure 9 This is a schematic diagram of the structure of a lubrication assembly provided in an embodiment of this application.

[0024] The annotations in the attached figures are explained as follows: 10. Power system; 100. Engine; 110. Crankshaft; 111. Positioning protrusion; 200, shell; 201, first receiving space; 202, second receiving space; 210, first shell portion; 211, second end plate; 212, second side plate; 220. Second shell section; 230. Connecting plate; 300. Drive motor assembly; 310. Drive motor stator; 320. Drive motor rotor; 330. Output shaft; 350. Bearing; 400. Generator assembly; 410. Generator stator; 420. Generator rotor; 421. Rotor body; 422. Connecting component; 4221. First end plate; 4222. First side plate; 4223. Positioning port; 4224. Through hole; 500. Lubrication components; 510. Oil pump; 520. Lubrication oil circuit; 521. Main oil circuit; 522. First branch oil circuit; 523. Second branch oil circuit; 530. Injection structure; 540. Solenoid valve; 550. Oil reservoir; 600, reducer; 700, differential; 800, half shaft; 901, left wheel; 902, right wheel. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] Currently, pure electric vehicles are gaining popularity among consumers due to their environmental friendliness, low operating costs, and superior driving experience. However, range anxiety remains a major pain point for pure electric vehicles due to limitations in battery energy density. Therefore, range-extended electric vehicles (REEVs) have become a widely accepted solution. A REEV consists of a range extender and a drive motor. The drive motor propels the vehicle, while the range extender generates electricity by consuming fuel, which can then charge the battery or directly power the drive motor. REEVs can effectively alleviate range anxiety for consumers.

[0030] Range-extended vehicles in related technologies occupy a large space due to their power systems, which include engines, generators, and drive motors, causing inconvenience to the overall vehicle layout.

[0031] Based on the aforementioned problems, the applicant of this application proposes the technical solution described in this application. Specifically, the generator assembly and the drive motor assembly are arranged within the same housing. This allows for an integrated design of the generator assembly and the drive motor assembly, thereby reducing the space occupied by the powertrain. Furthermore, by arranging the generator assembly and the drive motor assembly within the same housing and surrounding the drive motor assembly, the dimensions of the powertrain along the axis of the drive motor assembly can be further reduced, thereby further minimizing the space occupied by the powertrain. This provides convenience for the overall vehicle layout.

[0032] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, an embodiment of the first aspect of this application provides a power system 10, which includes an engine 100, a housing 200, a drive motor assembly 300, and a generator assembly 400. The housing 200 forms a first receiving space 201 and a second receiving space 202, with the second receiving space 202 at least partially surrounding the first receiving space 201. The drive motor assembly 300 is disposed in the first receiving space 201, and the generator assembly 400 is disposed in the second receiving space 202, with the generator assembly 400 surrounding the outer periphery of the drive motor assembly 300. The engine 100 is drive-connected to the generator assembly 400.

[0034] Specifically, the drive motor assembly 300 is used to drive the vehicle. The drive motor assembly 300 also includes an output shaft 330. The output shaft 330 of the drive motor assembly 300 can be connected to the differential 700 of the vehicle through a reducer 600. The differential 700 is connected to the left wheel 901 and the right wheel 902 of the vehicle through two half-shafts 800 respectively. In this way, the drive motor assembly 300 can provide power for the rotation of the left wheel 901 and the right wheel 902.

[0035] The engine 100 and the generator assembly 400 constitute the range extender of the vehicle. When the engine 100 is working, it can drive the generator assembly 400 to operate, thereby generating electrical energy, which can charge the battery or directly power the drive motor.

[0036] In the power system 10 of this embodiment, the housing 200 forms a first receiving space 201 and a second receiving space 202. The second receiving space 202 at least partially surrounds the first receiving space 201. A drive motor assembly 300 is disposed in the first receiving space 201, and a generator assembly 400 is disposed in the second receiving space 202. This arrangement allows the generator assembly 400 and the drive motor assembly 300 to be arranged within the same housing 200, thus enabling an integrated design of the generator assembly 400 and the drive motor assembly 300, thereby reducing the space occupied by the power system 10. Furthermore, with the generator assembly 400 and the drive motor assembly 300 arranged within the same housing 200, the generator assembly 400 is arranged around the outer periphery of the drive motor assembly 300. This allows for a further reduction in the axial dimension of the power system 10 in the drive motor assembly 300 direction, thereby further reducing the space occupied by the power system 10. This provides convenience for the overall vehicle layout.

[0037] like Figure 1 , Figure 4 , Figure 6 as well as Figure 7 As shown, in some embodiments, the drive motor assembly 300 includes a drive motor stator 310 and a drive motor rotor 320, with the drive motor rotor 320 located inside the drive motor stator 310. The generator assembly 400 includes a generator stator 410 and a generator rotor 420, with the generator rotor 420 surrounding the generator stator 410. The housing 200 includes a first housing portion 210, a second housing portion 220, and a connecting plate 230. The first housing portion 210 defines a first receiving space 201, and the second housing portion 220 is disposed around the outer periphery of the second housing portion 220. The first housing portion 210 is connected to the second housing portion 220 via the connecting plate 230. The first housing portion 210, the second housing portion 220, and the connecting plate 230 together define a second receiving space 202. Both the drive motor stator 310 and the generator stator 410 are fixedly connected to the first housing portion 210.

[0038] The housing 200 includes a first housing portion 210, a second housing portion 220, and a connecting plate 230. The first housing portion 210 defines a first receiving space 201, meaning the first receiving space 201 is located inside the first housing portion 210. The second housing portion 220 is disposed around the outer periphery of the second housing portion 220 and connected to the first housing portion 210 via the connecting plate 230. The first housing portion 210, the second housing portion 220, and the connecting plate 230 together define a second receiving space 202. This arrangement creates a first receiving space 201 for accommodating the drive motor assembly 300 and a second receiving space 202 for accommodating the generator assembly 400 within the housing 200.

[0039] Based on this, the drive motor assembly 300 includes a drive motor stator 310 and a drive motor rotor 320, with the rotor 320 located inside the stator 310, allowing the drive motor assembly 300 to adopt an inner rotor arrangement. The generator assembly 400 includes a generator stator 410 and a generator rotor 420, with the rotor 420 surrounding the stator 410, allowing the generator assembly 400 to adopt an outer rotor arrangement. The inner rotor arrangement of the drive motor assembly 300 and the outer rotor arrangement of the generator assembly 400 facilitate the fixed connection of both the drive motor stator 310 and the generator stator 410 to the first housing 210. Since the first housing 210 needs to provide mounting positions for the drive motor stator 310 and the generator stator 410 and ensure their operational stability, the wall thickness of the first housing 210 needs to be relatively thick to achieve better structural strength. Since the second shell portion 220 does not support the stator structure, it can be made relatively thinner. In other words, only one of the first shell portion 210 and the second shell portion 220 needs to have a thicker wall. This makes it easier to control the overall size of the shell 200 in the radial direction, resulting in a more compact structure.

[0040] like Figure 4 , Figure 8 As shown, in some embodiments, engine 100 includes crankshaft 110, which is connected to generator rotor 420.

[0041] In related technologies, the engine crankshaft and generator rotor are connected by structures such as flywheels and shock absorbers, which increases costs and the weight of the transmission system.

[0042] In this embodiment, the generator rotor 420 is directly connected to the crankshaft 110 of the engine 100, eliminating intermediate structures such as flywheels and shock absorbers in related technologies, thereby reducing the weight of the transmission system and production costs.

[0043] like Figure 8 As shown, in one embodiment, the generator rotor 420 includes a rotor body 421 and a connecting member 422. The connecting member 422 includes a first end plate 4221 and a first side plate 4222. The first side plate 4222 is annular. The first end plate 4221 is located at one end of the first side plate 4222 and connected to the first side plate 4222. The rotor body 421 is fixed to the inner side of the first side plate 4222. The first end plate 4221 is connected to the crankshaft 110.

[0044] The generator rotor 420 includes a rotor body 421 and a connecting member 422. The connecting member 422 includes a first end plate 4221 and a first side plate 4222. The rotor body 421 is fixed to the inner side of the first side plate 4222. The first end plate 4221 is connected to the crankshaft 110, thereby realizing the transmission connection between the crankshaft 110 and the rotor body 421. This allows the engine 100 to drive the rotor body 421 of the generator rotor 420 to rotate through the crankshaft 110 to generate electrical energy when the engine 100 is working.

[0045] In one embodiment, the first end plate 4221 and the first side plate 4222 are integrally formed. This gives the connecting member 422 good overall structural strength and rigidity, while also reducing installation steps and lowering costs.

[0046] like Figure 8 As shown, in one embodiment, the crankshaft 110 has an end face with a positioning protrusion 111 formed thereon. The first end plate 4221 is provided with a positioning port 4223 and a plurality of through holes 4224. The first end plate 4221 abuts against the end face, and the positioning protrusion 111 cooperates with the positioning port 4223. The first end plate 4221 and the crankshaft 110 are also fastened together by a plurality of bolts passing through the through holes 4224.

[0047] The crankshaft 110 has a positioning protrusion 111 on its end face, and the first end plate 4221 has a positioning opening 4223. When installing the first end plate 4221 and the crankshaft 110, the positioning opening 4223 can first mate with the positioning protrusion 111, thereby positioning the first end plate 4221 using the positioning protrusion 111 and the positioning opening 4223, and then installing the bolts for connecting the first end plate 4221 and the crankshaft 110. Therefore, the positioning protrusion 111 and the positioning opening 4223 facilitate the installation process of the first end plate 4221 and the crankshaft 110, thus improving installation efficiency.

[0048] like Figure 2 As shown, in some embodiments, the housing 200 is fixedly connected to the engine 100. That is, the housing 200 is fixedly connected to the engine 100, which improves the positional stability of the housing 200 relative to the engine 100, thereby enhancing the operational stability of the range extender. Additionally, it also improves the ability of the power system 10 to withstand external impacts, preventing malfunctions caused by relative positional shifts in certain structures under impact.

[0049] like Figure 2 , Figure 4 , Figure 6 as well as Figure 7As shown, in one embodiment, the housing 200 includes a first housing portion 210, a second housing portion 220, and a connecting plate 230. The first housing portion 210 defines a first receiving space 201, and the second housing portion 220 is disposed around the outer periphery of the second housing portion 220. The first housing portion 210 is connected to the second housing portion 220 via the connecting plate 230. The first housing portion 210, the second housing portion 220, and the connecting plate 230 together define a second receiving space 202. The second housing portion 220 is fixedly connected to the engine 100.

[0050] The housing 200 includes a first housing portion 210, a second housing portion 220, and a connecting plate 230. The first housing portion 210 defines a first receiving space 201, meaning the first receiving space 201 is located inside the first housing portion 210. The second housing portion 220 is disposed around the outer periphery of the second housing portion 220 and connected to the first housing portion 210 via the connecting plate 230. The first housing portion 210, the second housing portion 220, and the connecting plate 230 together define a second receiving space 202. This configuration creates a first receiving space 201 for accommodating the drive motor assembly 300 and a second receiving space 202 for accommodating the generator assembly 400 within the housing 200. Furthermore, the second housing portion 220 is fixedly connected to the engine 100, thereby achieving a fixed connection between the housing 200 and the engine 100.

[0051] like Figure 4 , Figure 5 as well as Figure 7 As shown, in one embodiment, the first housing portion 210 includes a second side plate 212 and a second end plate 211. The second side plate 212 is annular and is connected to the second housing portion 220 via a connecting plate 230. The second end plate 211 is located at one end of the second side plate 212 and is connected to the second side plate 212. The drive motor assembly 300 includes a drive motor stator 310 and a drive motor rotor 320. The drive motor rotor 320 is also connected to the second end plate 211 via a bearing 350.

[0052] The first housing portion 210 includes a second side plate 212 and a second end plate 211. The second side plate 212 is annular, and the second end plate 211 is located at one end of the second side plate 212 and connected to it. This allows the first housing portion 210 to be integrally formed into a cylindrical structure, and the internal space of the cylindrical structure constitutes a first receiving space 201 for accommodating the drive motor assembly 300. Furthermore, the drive motor rotor 320 is connected to the second end plate 211 via a bearing 350. This improves the stability of the drive motor rotor 320 during rotation, preventing positional deviations during rotation. This not only extends the service life of the drive motor assembly 300 but also reduces noise during operation.

[0053] like Figure 9 As shown, in some embodiments, the power system 10 further includes a lubrication assembly 500, which includes an oil pump 510, a lubrication oil passage 520, and an oil injection structure 530. The lubrication oil passage 520 includes a main oil passage 521 and multiple branch oil passages. Each branch oil passage is provided with an oil injection structure 530. The multiple branch oil passages include a first branch oil passage 522. The first branch oil passage 522 and the oil injection structure 530 thereon are used to spray lubricating oil onto the generator assembly 400. The first branch oil passage 522 is provided with a solenoid valve 540.

[0054] In pure electric drive mode, the drive motor assembly 300 operates, while the engine 100 and generator assembly 400 do not operate. At this time, the solenoid valve 540 is closed. In range-extending mode, the engine 100 drives the generator assembly 400. At this time, the solenoid valve 540 opens, and lubricating oil is sprayed onto the generator assembly 400, thereby cooling the generator assembly 400.

[0055] In one embodiment, the lubrication assembly 500 further includes an oil reservoir 550 for storing lubricating oil, and the main oil passage 521 is connected to the oil reservoir 550.

[0056] In one embodiment, the plurality of branch oil passages further include a second branch oil passage 523, and the second branch oil passage 523 and the oil spraying structure 530 thereon are used to spray lubricating oil onto the drive motor assembly 300. In this way, the lubricating oil sprayed onto the drive motor assembly 300 can dissipate heat from the drive motor assembly 300.

[0057] In one embodiment, the multiple branch oil circuits may also include other branch oil circuits for lubricating and cooling the reduction gear set in the reducer 600, thereby ensuring the operational stability of the reducer 600.

[0058] An embodiment of the second aspect of this application provides a vehicle that includes the power system 10 of any of the above embodiments.

[0059] The vehicle in this embodiment is based on the same inventive concept as the power system 10 in the above embodiments. Therefore, the vehicle in this embodiment can obtain the beneficial effects of the power system 10 in the corresponding embodiments.

[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power system, characterized in that, include: engine; A housing having a first receiving space and a second receiving space, the second receiving space at least partially surrounding the first receiving space; A drive motor assembly, wherein the drive motor assembly is disposed in the first accommodating space; A generator assembly is disposed in the second receiving space and is arranged around the outer periphery of the drive motor assembly. The engine is connected to the generator assembly in a transmission manner.

2. The power system according to claim 1, characterized in that, The drive motor assembly includes a drive motor stator and a drive motor rotor, the drive motor rotor being located inside the drive motor stator; the generator assembly includes a generator stator and a generator rotor, the generator rotor being arranged around the generator stator. The housing includes a first shell portion, a second shell portion, and a connecting plate. The first shell portion defines a first accommodating space. The second shell portion is disposed around the outer periphery of the second shell portion. The first shell portion is connected to the second shell portion through the connecting plate. The first shell portion, the second shell portion, and the connecting plate together define the second accommodating space. The drive motor stator and the generator stator are both fixedly connected to the first housing.

3. The power system according to claim 2, characterized in that, The engine includes a crankshaft connected to the generator rotor.

4. The power system according to claim 3, characterized in that, The generator rotor includes a rotor body and a connecting component. The connecting component includes a first end plate and a first side plate. The first side plate is annular. The first end plate is located at one end of the first side plate and connected to the first side plate. The rotor body is fixed to the inner side of the first side plate. The first end plate is connected to the crankshaft.

5. The power system according to claim 4, characterized in that, The crankshaft has an end face with a positioning protrusion. The first end plate has a positioning opening and multiple through holes. The first end plate abuts against the end face, and the positioning protrusion cooperates with the positioning opening. The first end plate and the crankshaft are also fastened together by multiple bolts passing through the through holes.

6. The power system according to claim 1, characterized in that, The housing is fixedly connected to the engine.

7. The power system according to claim 6, characterized in that, The housing includes a first shell portion, a second shell portion, and a connecting plate. The first shell portion defines a first accommodating space. The second shell portion is disposed around the outer periphery of the second shell portion. The first shell portion is connected to the second shell portion through the connecting plate. The first shell portion, the second shell portion, and the connecting plate together define the second accommodating space. The second housing is fixedly connected to the engine.

8. The power system according to claim 7, characterized in that, The first shell portion includes a second side plate and a second end plate. The second side plate is annular and is connected to the second shell portion via the connecting plate. The second end plate is located at one end of the second side plate and is connected to the second side plate. The drive motor assembly includes a drive motor stator and a drive motor rotor, and the drive motor rotor is also connected to the second end plate via bearings.

9. The power system according to any one of claims 1 to 8, characterized in that, The power system also includes a lubrication assembly, which includes an oil pump, a lubrication oil circuit, and an oil injection structure. The lubrication oil circuit includes a main oil circuit and multiple branch oil circuits. Each branch oil circuit is provided with an oil injection structure. The multiple branch oil circuits include a first branch oil circuit. The first branch oil circuit and the oil injection structure located thereon are used to spray lubricating oil onto the generator assembly. The first branch oil circuit is provided with a solenoid valve.

10. A vehicle, characterized in that, The power system included in any one of claims 1 to 9.

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