US-12623529-B2 - Vehicle driving device and vehicle

Abstract

A vehicle driving device includes an electric motor assembly. The electric motor assembly includes: a first electric motor, a second electric motor, and an electric motor controller. An electric motor shaft of the first electric motor and an electric motor shaft of the second electric motor extend in a length direction of a vehicle, and the first electric motor is disposed in front of the second electric motor. The electric motor controller is disposed at a top of the first electric motor and a top of the second electric motor, the first electric motor and the second electric motor are electrically connected to the electric motor controller.

Inventors

• Jiacheng Li
• Jun Luo
• Dong ZENG

Assignees

• BYD COMPANY LIMITED

Dates

Publication Date

20260512

Application Date

20250121

Priority Date

20220727

Claims (17)

1. 1 . A vehicle driving device, comprising an electric motor assembly, wherein the electric motor assembly comprises: a first electric motor; a second electric motor, an electric motor shaft of the first electric motor and an electric motor shaft of the second electric motor extending in a length direction of a vehicle, and the first electric motor disposed in front of the second electric motor; and an electric motor controller disposed at a top of the first electric motor and a top of the second electric motor, the first electric motor and the second electric motor electrically connected to the electric motor controller, wherein a housing of the second electric motor is connected to a rear surface of a housing of the first electric motor, the electric motor controller is strip-shaped and extends in the length direction of the vehicle, and a housing of the electric motor controller is disposed at a top of the housing of the first electric motor and a top of the housing of the second electric motor.
2. 2 . The vehicle driving device according to claim 1 , further comprising an oil pan connected to a bottom of the first electric motor.
3. 3 . The vehicle driving device according to claim 1 , further comprising an engine, a variable-speed transmission structure, and a differential, wherein: the variable-speed transmission structure is disposed on a right side of the first electric motor; and the variable-speed transmission structure comprises a first electric motor transmission gear set, a second electric motor transmission gear set, an engine input gear set, an output gear set, and a clutch, the engine input gear set is connected between a first end of the clutch and the engine, the output gear set is connected between a second end of the clutch and the differential, the first electric motor transmission gear set is connected between the first electric motor and the engine input gear set, the second electric motor transmission gear set is connected between the second electric motor and the output gear set, and the differential is connected to wheels of the vehicle.
4. 4 . The vehicle driving device according to claim 3 , wherein: the engine input gear set comprises an engine first-stage gear and a clutch input gear that mesh with each other, the engine first-stage gear is connected to the engine, and the clutch input gear is connected to the first end of the clutch; and the first electric motor transmission gear set comprises a first electric motor first-stage gear and an engine second-stage gear that mesh with each other, and the engine second-stage gear meshes with the engine first-stage gear.
5. 5 . The vehicle driving device according to claim 3 , wherein: the output gear set comprises a clutch output gear, a clutch driven gear, and a differential input shaft, the clutch output gear meshes with the clutch driven gear, the clutch driven gear is connected to the differential through the differential input shaft, and the clutch output gear is connected to the second end of the clutch; and the second electric motor transmission gear set comprises a second electric motor driving gear and a second electric motor driven gear that mesh with each other, and the second electric motor driven gear and the clutch output gear are connected to the differential input shaft.
6. 6 . The vehicle driving device according to claim 5 , wherein the differential is disposed on a front lower right side of the first electric motor, and the differential input shaft is disposed on a lower right side of the first electric motor.
7. 7 . The vehicle driving device according to claim 3 , further comprising a variable-speed transmission structure housing, wherein the variable-speed transmission structure housing is disposed to a front surface of a housing of the first electric motor, the first electric motor transmission gear set, the engine input gear set, the output gear set, and the clutch are mounted inside the variable-speed transmission structure housing, and the second electric motor transmission gear set is mounted inside the housing of the first electric motor.
8. 8 . The vehicle driving device according to claim 3 , further comprising a left half shaft, a middle shaft, a right half shaft, and a middle shaft tube that is connected to a left side of the differential, wherein: the differential comprises an input bevel gear, a left output bevel gear, and a right output bevel gear, the middle shaft is connected between the left output bevel gear and the left half shaft, the left half shaft is connected to a left wheel, and the right half shaft is connected between the right output bevel gear and a right wheel; and the middle shaft is disposed in the middle shaft tube.
9. 9 . The vehicle driving device according to claim 1 , wherein the electric motor shaft of the first electric motor and the electric motor shaft of the second electric motor are spaced away from each other in a width direction of the vehicle.
10. 10 . The vehicle driving device according to claim 1 , wherein the first electric motor and the second electric motor are electrically connected to the electric motor controller respectively through copper bars.
11. 11 . The vehicle driving device according to claim 1 , wherein a high-voltage direct-current bus interface of the electric motor controller is disposed on a right side of a housing of the electric motor controller, and is connected to a battery pack through a wire harness.
12. 12 . The vehicle driving device according to claim 1 , further comprising an oil-cooling plate heat exchanger disposed on a front left side of the first electric motor.
13. 13 . A vehicle, comprising a frame and a vehicle driving device mounted on the frame, wherein the vehicle driving device comprises an electric motor assembly, and the electric motor assembly comprises: a first electric motor; a second electric motor, an electric motor shaft of the first electric motor and an electric motor shaft of the second electric motor extending in a length direction of the vehicle, and the first electric motor disposed in front of the second electric motor; and an electric motor controller disposed at a top of the first electric motor and a top of the second electric motor, the first electric motor and the second electric motor electrically connected to the electric motor controller, wherein a housing of the second electric motor is connected to a rear surface of a housing of the first electric motor, the electric motor controller is strip-shaped and extends in the length direction of the vehicle, and a housing of the electric motor controller is disposed at a top of the housing of the first electric motor and a top of the housing of the second electric motor.
14. 14 . The vehicle according to claim 13 , wherein a lower left side of a housing of the second electric motor is connected to the frame through a first mount, and a lower right side of the housing of the second electric motor is connected to the frame through a second mount.
15. 15 . The vehicle according to claim 13 , wherein the vehicle driving device further comprises an oil pan connected to a bottom of the first electric motor.
16. 16 . The vehicle according to claim 13 , wherein the vehicle driving device further comprises an engine, a variable-speed transmission structure, and a differential, and wherein: the variable-speed transmission structure is disposed on a right side of the first electric motor; and the variable-speed transmission structure comprises a first electric motor transmission gear set, a second electric motor transmission gear set, an engine input gear set, an output gear set, and a clutch, the engine input gear set is connected between a first end of the clutch and the engine, the output gear set is connected between a second end of the clutch and the differential, the first electric motor transmission gear set is connected between the first electric motor and the engine input gear set, the second electric motor transmission gear set is connected between the second electric motor and the output gear set, and the differential is connected to wheels of the vehicle.
17. 17 . The vehicle according to claim 16 , wherein: the engine input gear set comprises an engine first-stage gear and a clutch input gear that mesh with each other, the engine first-stage gear is connected to the engine, and the clutch input gear is connected to the first end of the clutch; and the first electric motor transmission gear set comprises a first electric motor first-stage gear and an engine second-stage gear that mesh with each other, and the engine second-stage gear meshes with the engine first-stage gear.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation application of International Patent Application No. PCT/CN2023/090736, filed on Apr. 26, 2023, which is based on and claims priority to and benefits of Chinese Patent Application No. 202221963231.9, filed on Jul. 27, 2022. The entire content of all of the above-referenced applications is incorporated herein by reference. FIELD The present disclosure relates to a vehicle driving device and a vehicle. BACKGROUND In the related art, a driving device of a hybrid vehicle includes an engine, a motor for electricity generation, and a motor for driving. The motor for electricity generation is connected to the engine, and the motor for driving is connected to a front wheel through a differential mechanism. The driving device is longitudinally mounted on a vehicle body, a gear train is arranged between the engine and the motor for electricity generation, a rotation shaft of the motor for electricity generation is configured above a crankshaft of the engine, a front wheel output shaft is configured below the motor for electricity generation, and the front wheel output shaft transfers power from the motor for driving to the differential mechanism. However, the driving device of the hybrid vehicle has a technical problem of low integration. SUMMARY According to an aspect of the present disclosure, a vehicle driving device is provided, which includes an electric motor assembly. The electric motor assembly includes: a first electric motor, a second electric motor, and an electric motor controller. An electric motor shaft of the first electric motor and an electric motor shaft of the second electric motor extend in a length direction of a vehicle, and the first electric motor is disposed in front of the second electric motor. The electric motor controller is disposed at a top of the first electric motor and a top of the second electric motor, the first electric motor and the second electric motor are electrically connected to the electric motor controller. In an embodiment, the vehicle driving device further includes an oil pan connected to a bottom of the first electric motor. In an embodiment, a housing of the second electric motor is connected to a rear surface of a housing of the first electric motor. The electric motor controller is strip-shaped and extends in the length direction of the vehicle, and a housing of the electric motor controller is disposed at a top of the housing of the first electric motor and a top of the housing of the second electric motor. In an embodiment, the vehicle driving device further includes an engine, a variable-speed transmission structure, and a differential. The variable-speed transmission structure is disposed on a right side of the first electric motor. The variable-speed transmission structure includes a first electric motor transmission gear set, a second electric motor transmission gear set, an engine input gear set, an output gear set, and a clutch. The engine input gear set is connected between a first end of the clutch and the engine. The output gear set is connected between a second end of the clutch and the differential. The first electric motor transmission gear set is connected between the first electric motor and the engine input gear set. The second electric motor transmission gear set is connected between the second electric motor and the output gear set. The differential is connected to wheels of the vehicle. In an embodiment, the engine input gear set includes an engine first-stage gear and a clutch input gear that mesh with each other. The engine first-stage gear is connected to the engine, and the clutch input gear is connected to the first end of the clutch. The first electric motor transmission gear set includes a first electric motor first-stage gear and an engine second-stage gear that mesh with each other. The engine second-stage gear meshes with the engine first-stage gear. In an embodiment, the output gear set includes a clutch output gear, a clutch driven gear, and a differential input shaft. The clutch output gear meshes with the clutch driven gear. The clutch driven gear is connected to the differential through the differential input shaft. The clutch output gear is connected to the second end of the clutch. The second electric motor transmission gear set includes a second electric motor driving gear and a second electric motor driven gear that mesh with each other. The second electric motor driven gear and the clutch output gear are connected to the differential input shaft. In an embodiment, the differential is disposed on a front lower right side of the first electric motor, and the differential input shaft is arranged on a lower right side of the first electric motor. In an embodiment, the vehicle driving device further includes a variable-speed transmission structure housing. The variable-speed transmission structure housing is disposed to a front surface of the housing of the f