Range extender assembly and vehicle

Abstract

The utility model provides a range extender assembly and a vehicle, and relates to the technical field of vehicle parts, the range extender assembly comprises an engine and an axial motor, the axial motor comprises a rotor assembly and a stator assembly, the rotor assembly and the stator assembly are arranged along the axial direction and are coaxially arranged, and a crankshaft of the engine is coaxially connected with the rotor assembly. Thus, the axial motor with the large rotational inertia is directly connected with the crankshaft of the engine to reduce the influence of the rotating speed fluctuation of the engine on the NVH performance of the whole vehicle, a dual-mass flywheel structure can be omitted, the axial size of the range extender assembly is shortened, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle parts technical field, specifically, relate to a kind of range extender assembly and vehicle. BACKGROUND

[0002] At present, hybrid vehicle is mainly divided into plug-in hybrid electric vehicle (English for short PHEV) and range-extended electric vehicle (English for short REEV), wherein, range-extended electric vehicle mainly uses engine and generator as range extender assembly, generator is arranged at the front end of engine, for assisting engine starting and power generation. Since the intermittent torque of engine is generated by each cylinder firing in turn and the inertia torque is generated by piston reciprocating motion, the torque and rotational speed of engine output have periodic fluctuation characteristics, which further makes the whole range extender assembly produce torsional vibration when running, thereby generating vibration noise, affecting the driving experience of people in the vehicle.

[0003] In related technology, double-mass flywheel is arranged between engine and generator to reduce the influence of rotational speed fluctuation on vehicle NVH (Noise, Vibration, Harshness, i.e. noise, vibration and sound roughness) performance. However, the arrangement of double-mass flywheel leads to larger axial size of range extender assembly, which is not convenient for the arrangement of range extender assembly, and the cost is higher. SUMMARY

[0004] The problem solved by the utility model is: how to reduce the influence of rotational speed fluctuation on vehicle NVH performance while shortening the axial size of range extender assembly.

[0005] To solve the above problems, the utility model provides a kind of range extender assembly and vehicle.

[0006] In the first aspect, the utility model provides a kind of range extender assembly, including engine and axial motor, the axial motor includes rotor assembly and stator assembly arranged coaxially along the axial direction, the crankshaft of the engine is coaxially connected with the rotor assembly.

[0007] Optionally, the rotor assembly is provided with two, the stator assembly is provided with one, each rotor assembly includes hub and rotor, which is sleeved on the hub and coaxially connected with the hub, the hubs of two rotor assemblies are coaxially connected, the stator assembly is located between the rotor of two rotor assemblies, and a part of the stator assembly is sleeved on the hub of one rotor assembly, and another part is sleeved on the hub of another rotor assembly, the crankshaft is coaxially connected with the hub of one of two rotor assemblies.

[0008] Optionally, the rotor assembly further includes a support bearing, which is sleeved outside the hub, and the stator assembly is sleeved outside the support bearing.

[0009] Optionally, the rotor includes a rotor disk, a rotor core, and magnets. The rotor disk is connected to one end of the hub, the rotor core is connected to the side of the rotor disk facing the stator assembly, and the magnets are evenly distributed along the circumference of the rotor core on the side of the rotor core away from the rotor disk.

[0010] Optionally, the rotor disk is provided with a mounting groove along its circumference, and the rotor core is bonded to the mounting groove.

[0011] Optionally, the rotor core is a wound silicon steel core.

[0012] Optionally, the stator assembly includes a stator, a stator hub, and a fixed end plate arranged coaxially. The stator is sleeved outside the stator hub, the stator hub is sleeved outside the rotating hub, and the axial end face of the stator and the axial end face of the stator are respectively connected to the fixed end plate.

[0013] Optionally, the stator includes a stator winding and a plurality of stator cores, the plurality of stator cores being uniformly bonded to the fixed end plate along the circumference of the stator hub, and the stator winding being wound sequentially around the plurality of stator cores.

[0014] Optionally, the range extender assembly further includes a speed sensor disposed on the crankshaft for detecting the rotational speed of the crankshaft.

[0015] Secondly, this utility model provides a vehicle including the range extender assembly described above.

[0016] The beneficial effects of this utility model's range extender assembly and vehicle are as follows: By directly connecting the engine crankshaft to the rotor assembly of the axial motor, energy can be stored and released using the axial motor, which has a large moment of inertia. This allows the engine to maintain a relatively stable speed during operation, thereby reducing the impact of engine speed fluctuations on the overall vehicle's NVH performance. Furthermore, compared to related technologies that use a dual-mass flywheel structure between the engine and motor, directly connecting the engine to the axial motor eliminates the need for the dual-mass flywheel structure, thus shortening the axial dimension of the range extender assembly and reducing production costs. Additionally, the axial motor is small in size and lightweight, requiring less space and facilitating its arrangement in space-constrained environments. Moreover, the number of rotor and stator assemblies can be flexibly configured to increase motor power density. Attached Figure Description

[0017] Figure 1This is a cross-sectional view of the axial motor of the range extender assembly connected to the engine crankshaft in an embodiment of this utility model.

[0018] Figure 2 This is a cross-sectional schematic diagram of the rotor assembly in an embodiment of the present utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the rotor assembly from another perspective in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the stator structure in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the range extender system in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Engine; 11. Crankshaft; 20. Axial motor; 21. Rotor assembly; 211. Rotor; 2111. Rotor disc; 2111a. Mounting slot; 2112. Rotor core; 2113. Magnet; 212. Hub; 213. Support bearing; 22. Stator assembly; 221. Stator; 2211. Stator winding; 2212. Stator core; 222. Stator hub; 223. Fixed end plate; 23. Housing; 30. Speed ​​sensor. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0025] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0026] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0027] In related technologies, range-extended electric vehicles primarily use an engine and a generator as the range extender assembly. The generator is located at the front of the engine to assist in engine starting and power generation. Because the engine's cylinders ignite alternately, generating intermittent torque, and the piston's reciprocating motion generates inertial torque, the engine's output torque and speed exhibit periodic fluctuations. This causes torsional vibration in the entire range extender assembly during operation, resulting in vibration noise that affects the driving and riding experience of the occupants. Currently, a dual-mass flywheel is used between the engine and the generator to reduce the impact of speed fluctuations on the vehicle's NVH performance. However, the dual-mass flywheel configuration results in a larger axial dimension of the range extender assembly, making its layout inconvenient and increasing costs.

[0028] In view of the problems existing in the above-mentioned related technologies, this utility model provides a range extender assembly and a vehicle.

[0029] Combination Figure 1 and Figure 5 As shown in the figure, an embodiment of the present invention provides a range extender assembly, including an engine 10 and an axial motor 20. The axial motor 20 includes a rotor assembly 21 and a stator assembly 22 arranged axially and coaxially. The crankshaft 11 of the engine 10 is coaxially connected to the rotor assembly 21.

[0030] It should be noted that axial motor 20 refers to a motor in which the magnetic flux flows along the axial direction of the motor, and correspondingly, radial motor refers to a motor in which the magnetic flux flows along the radial direction of the motor.

[0031] Specifically, in the range extender assembly of this embodiment, the crankshaft 11 of the engine 10 is directly coaxially connected to the rotor assembly 21 of the axial motor 20 using methods such as bolts. This means that the dual-mass flywheel structure between the engine 10 and the axial motor 20 is eliminated. Furthermore, the axial motor 20 typically has a disc-shaped structure and a large moment of inertia. The axial motor 20 stores and releases energy through its large moment of inertia, allowing the engine 10 to maintain a relatively stable speed during operation, thereby reducing the impact of engine speed fluctuations on the overall vehicle NVH performance. The rotor assembly 21 and stator assembly 22 of the axial motor 20 are also disc-shaped and parallel to each other; therefore, the axial motor 20 is often referred to as a disc motor or a flat motor. The number of rotor assemblies 21 and stator assemblies 22 in the axial motor 20 can be one or more. When there is one rotor assembly 21 and one stator assembly 22, the axial motor 20 has a single-stator single-rotor structure. When there are two rotor assemblies 21 and one stator assembly 22, the stator assembly 22 is usually located between the two rotor assemblies 21, and the axial motor 20 has a single-stator dual-rotor structure. When there is one rotor assembly 21 and two stator assemblies 22, the rotor assembly 21 is usually located between the two stator assemblies 22, and the axial motor 20 has a dual-stator single-rotor structure. When there are multiple rotor assemblies 21 and multiple stator assemblies 22, the rotor assemblies 21 and stator assemblies 22 are arranged alternately along the axial direction, and the axial motor 20 has a multi-disc composite structure. The specific number of rotor assemblies 21 and stator assemblies 22 is not limited here. In practical applications, the design can be selected according to needs. For example, multiple rotor assemblies 21 and multiple stator assemblies 22 can be flexibly configured to improve power density.

[0032] In this embodiment, the range extender assembly can directly connect the crankshaft 11 of the engine 10 to the rotor assembly 21 of the axial motor 20. This allows the axial motor 20, with its large moment of inertia, to store and release energy, enabling the engine 10 to maintain a relatively stable speed during operation and reducing the impact of engine speed fluctuations on the overall vehicle NVH performance. Furthermore, compared to the dual-mass flywheel structure used in related technologies, directly connecting the engine 10 to the axial motor 20 eliminates the need for the dual-mass flywheel structure, thereby shortening the axial dimension of the range extender assembly and reducing production costs. Additionally, the axial motor 20 is small and lightweight, requiring less space and facilitating its arrangement in space-constrained environments. Moreover, the number of rotor assemblies 21 and stator assemblies 22 can be flexibly configured to increase motor power density.

[0033] Furthermore, combined Figure 1As shown, the axial motor 20 also includes a housing 23, within which the rotor assembly 21 and stator assembly 22 are disposed. The stator assembly 22 is typically detachably connected to the housing 23 using bolts. This allows the stator assembly 22 to be mounted and secured within the housing 23. Additionally, the cylinder block of the engine 10 is also detachably connected to the housing 23 using bolts.

[0034] Optionally, combined Figure 1 As shown, there are two rotor assemblies 21 and one stator assembly 22. Each rotor assembly 21 includes a hub 212 and a rotor 211 that is sleeved on the hub 212 and coaxially connected to the hub 212. The hubs 212 of the two rotor assemblies 21 are coaxially connected. The stator assembly 22 is located between the rotors 211 of the two rotor assemblies 21. A part of the stator assembly 22 is sleeved on the hub 212 of one rotor assembly 21, and another part is sleeved on the hub 212 of the other rotor assembly 21. The crankshaft 11 is coaxially connected to the hub 212 of one of the two rotor assemblies 21.

[0035] In this optional embodiment, the axial motor 20 adopts a dual-rotor, single-stator structure. Specifically, the axial motor 20 includes two rotor assemblies 21 and one stator assembly 22. Each rotor assembly 21 includes a disc-shaped rotor 211 and an annular hub 212. The rotor 211 is mounted on the hub 212 and fixedly connected to one end of the hub 212 using methods such as bolts. The crankshaft 11 of the engine 10 is typically coaxially connected to the end of the hub 212 away from the stator assembly 22 using fasteners such as bolts. Simultaneously, the hubs 212 of the two rotor assemblies 21 are typically coaxially connected using fasteners such as bolts. The stator assembly 22 is mounted on the hubs 212 of the two rotor assemblies 21, and the rotors 211 of the two rotor assemblies 21 are respectively located at both axial ends of the stator assembly 22. In this way, by designing the axial motor 20 as a dual-rotor single-stator structure, not only can the power density of the axial motor 20 be improved, but the rotational inertia of the axial motor 20 can also be increased, further suppressing the speed fluctuation of the engine 10. At the same time, the stator assembly 22 can be made into a coreless structure or a thin core structure, thereby reducing the air gap thickness between the rotor assembly 21 and the stator assembly 22 and improving the motor efficiency.

[0036] In other embodiments, when the axial motor 20 is a double-stator single-rotor structure including a rotor assembly 21 and two stator assemblies 22, the rotor 211 is sleeved on the middle part of the hub 212 and bolted to the hub 212. The two stator assemblies 22 are respectively sleeved on both ends of the hub 212 and rotatably connected to the hub 212. The crankshaft 11 of the engine 10 is coaxially arranged with the hub 212 and bolted to it. When the axial motor 20 is a single-stator single-rotor structure including a rotor assembly 21 and a stator assembly 22, the rotor 211 is sleeved on one end of the hub 212 and bolted to the hub 212. The stator assembly 22 is sleeved on the other end of the hub 212 and rotatably connected to the hub 212. The crankshaft 11 of the engine 10 is bolted to the rotor 211 or the hub 212. When the axial motor 20 is a multi-disc composite structure including multiple rotor assemblies 21 and multiple stator assemblies 22 arranged alternately, if both ends or one end of the axial direction is a rotor assembly 21, the crankshaft 11 of the engine 10 can be bolted to the rotor 211 or hub 212 at the end. If both ends of the axial direction are stator assemblies 22, the crankshaft 11 of the engine 10 can be bolted to the hub 212 at the end.

[0037] Optionally, combined Figure 2 and Figure 3 As shown, the rotor assembly 21 also includes a support bearing 213 sleeved outside the hub 212, and the stator assembly 22 is sleeved outside the support bearing 213.

[0038] In this optional embodiment, the support bearing 213 is typically an angular contact bearing, located between the rotors 211 of the two rotor assemblies 21. The inner ring of the support bearing 213 is interference-fitted with the hub 212, while the outer ring is clearance-fitted with the stator assembly 22, enabling relative rotation between the rotor assembly 21 and the stator assembly 22. Thus, by using a support bearing 213, such as an angular contact bearing, for radial support between the rotor assembly 21 and the stator assembly 22, the risk of bearing knocking due to radial forces is reduced. Furthermore, when the axial motor 20 adopts a dual-rotor, single-stator structure, the support bearing 213 can also eliminate the problem of axial movement of the rotor 211 caused by uneven air gaps between the two rotors, thereby reducing the noise during operation of the axial motor 20 and improving the overall NVH performance of the vehicle.

[0039] Optionally, combined Figure 1 and Figure 2 As shown, the rotor 211 includes a rotor disk 2111, a rotor core 2112, and magnets 2113. The rotor disk 2111 is connected to one end of the hub 212, the rotor core 2112 is connected to the side of the rotor disk 2111 facing the stator assembly 22, and the magnets 2113 are evenly distributed along the circumference of the rotor core 2112 on the side of the rotor core 2112 away from the rotor disk 2111.

[0040] In this optional embodiment, the rotor disk 2111 and the hub 212 are typically connected by fasteners such as bolts. The rotor core 2112 is typically fixed to the side of the rotor disk 2111 facing the stator assembly 22 by means of adhesive bonding, for example. A plurality of magnets 2113 are typically fixed to the side of the rotor core 2112 away from the rotor disk 2111 by means of adhesive bonding, for example, in order to assemble the rotor 211. For ease of description, the two rotor assemblies 21 are referred to as the first rotor assembly and the second rotor assembly, respectively. Correspondingly, the rotor disk 2111 and the hub 212 in the first rotor assembly are referred to as the first rotor disk and the first hub, respectively, and the rotor disk 2111 and the hub 212 in the second rotor assembly are referred to as the second rotor disk and the second hub, respectively. The first rotor disk can be designed as a disk-shaped structure with a through hole in the middle, and the second rotor disk can be designed as a complete disk-shaped structure. In this case, the first rotor disk is fitted onto the first hub and is bolted to the first hub. The second rotor disk is bolted to the axial end face of the second hub. The first hub passes through the first rotor disk and is connected to the crankshaft 11 of the engine 10. Alternatively, both the first rotor disk and the second rotor disk can be designed as disk-shaped structures with a through hole in the middle. In this case, the first rotor disk is bolted to the axial end face of the first hub, and the second rotor disk is bolted to the axial end face of the second hub. The crankshaft 11 of the engine 10 is coaxially connected to one of the first hub and the second hub. In addition, multiple magnets 2113 are evenly distributed around the rotor core 2112, ensuring a uniform magnetic field distribution and improving motor operating efficiency. Furthermore, bonding the magnets 2113 to the rotor core 2112 not only facilitates assembly but also helps reduce iron loss and improve motor efficiency.

[0041] In other embodiments, the crankshaft 11 of the engine 10 can also be coaxially connected to the rotor disk 2111 of the rotor 211 using fasteners such as bolts. In this case, the rotor disk 2111 can be a complete disk-shaped structure or a disk-shaped structure with a through hole in the middle.

[0042] Optionally, combined Figure 2 and Figure 3 As shown, the rotor disk 2111 has a mounting groove 2111a along its circumference, and the rotor core 2112 is bonded to the mounting groove 2111a. In this way, by embedding the rotor core 2112 at least partially in the mounting groove 2111a, the space occupied by the rotor core 2112 can be reduced, further shortening the axial dimension of the axial motor 20 and even the entire range extender assembly; moreover, the rotor disk 2111 and the rotor core 2112 are fixedly connected by bonding, which not only facilitates assembly, but also helps to reduce iron loss and improve motor efficiency.

[0043] Optionally, the rotor core 2112 is a wound silicon steel core. By winding silicon steel sheets into a silicon steel core to form the rotor core 2112, the rotor core 2112 has continuous magnetic channels and a compact magnetic circuit, resulting in no air gaps and thus high permeability and low noise, making it suitable for high-speed, high-efficiency axial motors 20.

[0044] Optionally, combined Figure 1 As shown, the stator assembly 22 includes a stator 221, a stator hub 222 and a fixed end plate 223 arranged coaxially. The stator 221 is sleeved on the stator hub 222, and the stator hub 222 is sleeved on the hub 212. The axial end face of the stator 221 and the axial end face of the stator hub 222 are respectively connected to the fixed end plate 223.

[0045] In this optional embodiment, a support bearing 213 is typically provided between the stator hub 222 and the rotating hub 212. The stator hub 222 is sleeved on the support bearing 213, and the outer ring of the support bearing 213 is clearance-fitted with the stator hub 222. Each of the axial ends of the stator 221 is typically provided with a fixed end plate 223. The axial end face of the stator 221 is typically connected to the corresponding fixed end plate 223 by adhesive bonding, and the axial end face of the stator hub 222 is typically connected to the corresponding fixed end plate 223 by bolts. Furthermore, the fixed end plate 223 is also bolted to the housing 23. This allows for the assembly of the stator assembly 22.

[0046] Optionally, combined Figure 1 and Figure 4 As shown, the stator 221 includes a stator winding 2211 and multiple stator cores 2212. The multiple stator cores 2212 are evenly bonded to the fixed end plate 223 along the circumference of the stator hub 222, and the stator winding 2211 is wound around the multiple stator cores 2212 in sequence.

[0047] In this optional embodiment, the stator core 2212 has a petal-shaped structure, with multiple stator cores 2212 arranged circumferentially around the stator hub 222 and bonded to the fixed end plate 223. This ensures convenient assembly and uniform magnetic field distribution. Furthermore, two fixed end plates 223 can be sequentially assembled onto the multiple stator cores 2212, and the stator winding 2211 can be wound onto the multiple stator cores 2212 before the second fixed end plate 223 is assembled, thus facilitating the installation of the stator winding 2211. The stator winding 2211 is wound multiple turns around the stator cores 2212, and sequentially wound onto multiple stator cores 2212. This integrated winding method allows the stator winding 2211 to be sequentially wound onto multiple stator cores 2212, reducing the number of welding operations and improving welding efficiency and yield.

[0048] Optionally, combined Figure 5 As shown, the range extender assembly also includes a speed sensor 30, which is mounted on the crankshaft 11 and is used to detect the speed of the crankshaft 11.

[0049] In the range extender system of hybrid vehicles, such as Figure 5 As shown, the crankshaft 11 of the engine 10 is directly connected to the axial motor 20. The engine controller is electrically connected to the engine 10, and the motor controller is electrically connected to both the axial motor 20 and the battery. The speed sensor 30 is mounted on the crankshaft 11 of the engine 10. Furthermore, the axial motor 20 can both generate electricity and output torque to start the engine 10. When starting the engine 10 using the axial motor 20, the axial motor 20 generates an alternating magnetic field through the stator winding 2211, driving the rotor 211 and hub 212 to rotate. This causes the hub 212 to drive the crankshaft 11 of the engine 10 to rotate, thereby starting the engine 10. When the engine 10 starts normally, the crankshaft 11 of the engine 10 drives the hub 212 of the axial motor 20 to rotate. The hub 212 drives the rotor 211 to rotate, causing the stator winding 2211 to cut the magnetic field, generating and outputting current to achieve power generation. When the axial motor 20 is in generator mode, it functions as a generator. At this time, since the actual torque of the generator originates from the crankshaft 11 of the engine 10, and the actual output torque of the engine 10 is affected by discontinuous combustion in the cylinders and dynamic imbalance forces, the torque will fluctuate periodically, causing fluctuations in the generator torque. This results in a difference between the actual torque of the generator and the target torque (i.e., the set control target value). Therefore, this embodiment uses a speed sensor 30 to detect the rotational speed of the crankshaft 11 of the engine 10. This allows the engine controller to evaluate the rotational speed fluctuations of the engine 10 (i.e., the difference between the peak and trough of the rotational speed) based on the speed signal detected by the speed sensor 30. If the rotational speed fluctuation is greater than the preset speed value, the angular acceleration of the crankshaft 11 is calculated using an acceleration calculation model, and the required torque for loading / unloading corresponding to this angular acceleration is calculated using a torque calculation model. This required torque is then added to the torque request of the axial motor 20, ensuring that the torque output by the axial motor 20 reaches the target torque, thereby controlling the rotational speed fluctuations of the engine 10.

[0050] This utility model provides a vehicle including the range extender assembly described above.

[0051] The beneficial effects of the vehicle in this embodiment are the same as those of the range extender described above, and will not be repeated here.

[0052] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A range extender assembly, characterized in that, The device includes an engine (10) and an axial motor (20), the axial motor (20) including a rotor assembly (21) and a stator assembly (22) arranged axially and coaxially, the crankshaft (11) of the engine (10) being coaxially connected to the rotor assembly (21).

2. The range extender assembly according to claim 1, characterized in that, Two rotor assemblies (21) are provided, and one stator assembly (22) is provided. Each rotor assembly (21) includes a hub (212) and a rotor (211) sleeved on the hub (212) and coaxially connected to the hub (212). The hubs (212) of the two rotor assemblies (21) are coaxially connected. The stator assembly (22) is located between the rotors (211) of the two rotor assemblies (21). A part of the stator assembly (22) is sleeved on the hub (212) of one rotor assembly (21), and another part is sleeved on the hub (212) of the other rotor assembly (21). The crankshaft (11) is coaxially connected to the hub (212) of one of the two rotor assemblies (21).

3. The range extender assembly according to claim 2, characterized in that, The rotor assembly (21) further includes a support bearing (213), which is sleeved outside the hub (212), and the stator assembly (22) is sleeved outside the support bearing (213).

4. The range extender assembly according to claim 2, characterized in that, The rotor (211) includes a rotor disk (2111), a rotor core (2112), and magnets (2113). The rotor disk (2111) is connected to one end of the hub (212), and the rotor core (2112) is connected to the side of the rotor disk (2111) facing the stator assembly (22). The magnets (2113) are evenly distributed along the circumference of the rotor core (2112) on the side of the rotor core (2112) away from the rotor disk (2111).

5. The range extender assembly according to claim 4, characterized in that, The rotor disk (2111) has a mounting groove (2111a) along its circumference, and the rotor core (2112) is bonded to the mounting groove (2111a).

6. The range extender assembly according to claim 4, characterized in that, The rotor core (2112) is a wound silicon steel core.

7. The range extender assembly according to claim 2, characterized in that, The stator assembly (22) includes a stator (221), a stator hub (222), and a fixed end plate (223) arranged coaxially. The stator (221) is sleeved on the stator hub (222), the stator hub (222) is sleeved on the rotating hub (212), and the axial end face of the stator (221) and the axial end face of the stator hub (222) are respectively connected to the fixed end plate (223).

8. The range extender assembly according to claim 7, characterized in that, The stator (221) includes a stator winding (2211) and a plurality of stator cores (2212). The plurality of stator cores (2212) are uniformly bonded to the fixed end plate (223) along the circumference of the stator hub (222). The stator winding (2211) is wound around the plurality of stator cores (2212) in sequence.

9. The range extender assembly according to claim 1, characterized in that, It also includes a speed sensor (30), which is disposed on the crankshaft (11) for detecting the speed of the crankshaft (11).

10. A vehicle, characterized in that, Includes the range extender assembly as described in any one of claims 1-9.

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