动力总成及车辆
By arranging the drive motor, generator, and engine coaxially and integrating the controller with the drive motor, the problem of low integration of the powertrain in range-extended electric vehicles is solved, achieving a compact powertrain layout and improving space utilization and power output efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAOMI EV TECH CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-17
AI Technical Summary
The powertrain components of existing range-extended electric vehicles are scattered, occupying a large space and having low integration.
The drive motor, generator, and engine are arranged coaxially, and the controller is integrated with the drive motor and generator. The generator is nested outside the drive motor, and the reduction mechanism and differential are integrated with the drive motor. The space utilization is optimized through the housing structure.
It improves the integration of the powertrain, reduces the space occupied, optimizes the wiring layout, reduces the probability of failure, facilitates maintenance and repair, and improves power output efficiency.
Smart Images
Figure CN224510868U_ABST
Abstract
Claims
1. A powertrain, characterized by, include: Drive motor; A generator, which is arranged around the outer periphery of the drive motor; The controller is arranged radially alongside the drive motor, and axially alongside the generator. as well as An engine is connected to the generator for driving, and the drive motor, the generator, and the engine are arranged coaxially.
2. The powertrain of claim 1, wherein, The axial length of the generator is less than the axial length of the drive motor, so that space is reserved for the controller on one side of the generator's axial direction.
3. The powertrain of claim 1, wherein, The controller is located on the side of the generator that is axially opposite to the engine.
4. The powertrain of claim 1, wherein, The powertrain also includes a reduction gear mechanism, the drive motor is connected to the input end of the reduction gear mechanism, and the reduction gear mechanism is located on the side of the drive motor that is axially opposite to the engine.
5. The powertrain of claim 4, wherein, The powertrain also includes a differential connected to the reduction gear, the differential being arranged radially alongside the reduction gear.
6. The powertrain of claim 5, wherein, The controller is located on the side of the reduction gear and / or the drive motor away from the differential.
7. The powertrain of claim 1, wherein, The powertrain also includes a first housing, with the drive motor and the generator disposed inside the first housing and the controller disposed outside the first housing.
8. The powertrain of claim 7, wherein, The engine includes a cylinder block, and the first housing and the cylinder block form an installation space for mounting the drive motor and the generator.
9. The powertrain of claim 8, wherein, The first housing includes a first housing portion and a second housing portion connected axially. One end of the first housing portion opposite to the second housing portion is connected to the cylinder body. At least a portion of the outer peripheral wall of the second housing portion is recessed relative to the outer peripheral wall of the first housing portion to form a recess. The controller is disposed in the recess.
10. The powertrain of claim 9, wherein, The generator is located inside the first housing portion, and the drive motor is located inside both the first housing portion and the second housing portion.
11. The powertrain of claim 8, wherein, The engine includes a crankshaft, and the generator includes a first rotor, the crankshaft extending into the mounting space and connected to the first rotor.
12. The powertrain of claim 11, wherein, The drive motor includes a second rotor that is rotatably connected to the crankshaft.
13. The powertrain of claim 12, wherein, The generator includes a first stator disposed inside the first rotor, and the drive motor includes a second stator surrounding the outside of the second rotor. The first stator and the second stator share the same stator core.
14. The powertrain of claim 11, wherein, The first housing includes a partition located within the mounting space, the partition dividing the mounting space into a first mounting space and a second mounting space, the generator being located within the first mounting space, the drive motor being located within the second mounting space, and the drive motor including a second rotor rotatably connected to the partition.
15. The powertrain of claim 14, wherein, The first mounting space is located on the side of the second mounting space near the engine. The first mounting space and the second mounting space partially overlap in the axial direction. The outer diameter of the first mounting space is larger than the outer diameter of the second mounting space.
16. The powertrain of claim 14, wherein, The generator includes a first stator disposed inside the first rotor, the drive motor includes a second stator surrounding the outside of the second rotor, and the first housing includes an annular cylinder connected between the first stator and the second stator.
17. The powertrain according to claim 16, characterized in that, An end plate is provided on the side of the first housing away from the engine. The partition is located on the side of the end plate closer to the engine and is disposed inside the annular cylinder. The partition and the end plate together form the second mounting space. The two ends of the second rotor are rotatably connected to the partition and the end plate, respectively.
18. The powertrain of claim 8, wherein, The powertrain includes a second housing connected to the side of the first housing opposite to the engine. The second housing contains a reduction mechanism and a differential, with the reduction mechanism connected to the drive motor and the differential respectively.
19. A vehicle characterized by comprising: Includes the powertrain described in any one of claims 1-18.
20. A vehicle characterized by Includes a powertrain, half-shafts, and wheels, the powertrain comprising: engine; Drive motor; A generator, which is arranged around the outer periphery of the drive motor and is driven by the engine; The controller is arranged radially alongside the drive motor, and axially alongside the generator. The transmission mechanism is used to drive the drive motor to the half-shaft, and the half-shaft is connected to the wheel.
21. The vehicle of claim 20, wherein, The engine includes a crankshaft connected to the generator, the axis of which extends along the width direction of the vehicle, and / or, The drive motor, the generator, and the engine are arranged on the same axis.
22. The vehicle of claim 21, wherein, The engine, the drive motor, and the generator are located above the half-shaft, and the controller is located above the drive motor.
23. The vehicle of any one of claims 20-22, wherein, The transmission mechanism includes a reduction mechanism and a differential. The drive motor is connected to the differential through the reduction mechanism. The reduction mechanism is located on the side of the drive motor that is axially opposite to the engine. The differential is located below the reduction mechanism and connected to the half-shaft.