Hybrid electric vehicle and power system thereof

Abstract

This application discloses a hybrid power automobile and a power system thereof. The power system includes: an engine, where the engine outputs power to wheels of the hybrid power automobile through a clutch; a power motor, where the power motor is configured to output a drive force to the wheels of the hybrid power automobile; a power battery, where the power battery is configured to supply power to the power motor; a DC-DC converter; and an auxiliary motor connected to the engine, where the auxiliary motor is connected to the power motor, the DC-DC converter, and the power battery, and when performing power generation under driving of the engine, the auxiliary motor implements at least one of charging the power battery, supplying power to the power motor, and supplying power to the DC-DC converter. Therefore, low-speed electric balance and low-speed smoothness of the entire vehicle can be maintained.

What is claimed is: 
     
         1 . A power system of a hybrid power automobile, comprising:
 an engine, wherein the engine outputs power to wheels of the hybrid power automobile through a clutch;   a power motor, wherein the power motor is configured to output a drive force to the wheels of the hybrid power automobile;   a power battery, wherein the power battery is configured to supply power to the power motor;   a DC-DC converter; and   an auxiliary motor connected to the engine, wherein the auxiliary motor is connected to the power motor, the DC-DC converter, and the power battery, and when performing power generation under driving of the engine, the auxiliary motor implements at least one of charging the power battery, supplying power to the power motor, and supplying power to the DC-DC converter.   
     
     
         2 . The power system of a hybrid power automobile according to  claim 1 , wherein the auxiliary motor comprises a first controller, the power motor comprises a second controller, and the auxiliary motor is connected to the power battery and the DC-DC converter through the first controller and connected to the power motor through the first controller and the second controller. 
     
     
         3 . The power system of a hybrid power automobile according to  claim 1 , wherein the DC-DC converter is further connected to the power battery. 
     
     
         4 . The power system of a hybrid power automobile according to  claim 2 , wherein the DC-DC converter is further connected to the power motor through the second controller. 
     
     
         5 . The power system of a hybrid power automobile according to  claim 1 , wherein the DC-DC converter is further connected to a first electric appliance device and a low-voltage storage battery of the hybrid power automobile to supply power to the first electric appliance device and the low-voltage storage battery, and the low-voltage storage battery is further connected to the first electric appliance device. 
     
     
         6 . The power system of a hybrid power automobile according to  claim 2 , wherein the first controller, the second controller, and the power battery are further respectively connected to a second electric appliance device of the hybrid power automobile. 
     
     
         7 . The power system of a hybrid power automobile according to  claim 1 , wherein the auxiliary motor is a BSG motor. 
     
     
         8 . The power system of a hybrid power automobile according to  claim 1 , wherein the engine and the power motor jointly drive a same wheel of the hybrid power automobile. 
     
     
         9 . The power system of a hybrid power automobile according to  claim 1 , wherein wheels of the hybrid power automobile comprise a first wheel and a second wheel;
 the engine outputs power to the first wheel of the hybrid power automobile through the clutch; and   the power motor is configured to output a drive force to the second wheel of the hybrid power automobile.   
     
     
         10 . A hybrid power automobile, comprising the power system of a hybrid power automobile according to  claim 1 . 
     
     
         11 . The power system of a hybrid power automobile according to  claim 2 , wherein the DC-DC converter is further connected to the power battery. 
     
     
         12 . The power system of a hybrid power automobile according to  claim 11 , wherein the DC-DC converter is further connected to the power motor through the second controller. 
     
     
         13 . The power system of a hybrid power automobile according to  claim 12  wherein the DC-DC converter is further connected to a first electric appliance device and a low-voltage storage battery of the hybrid power automobile to supply power to the first electric appliance device and the low-voltage storage battery, and the low-voltage storage battery is further connected to the first electric appliance device. 
     
     
         14 . The power system of a hybrid power automobile according to  claim 13 , wherein the first controller, the second controller, and the power battery are further respectively connected to a second electric appliance device of the hybrid power automobile. 
     
     
         15 . The power system of a hybrid power automobile according to  claim 14 , wherein the auxiliary motor is a BSG motor. 
     
     
         16 . The power system of a hybrid power automobile according to  claim 15 , wherein the engine and the power motor jointly drive a same wheel of the hybrid power automobile. 
     
     
         17 . The power system of a hybrid power automobile according to  claim 15 , wherein wheels of the hybrid power automobile comprise a first wheel and a second wheel;
 the engine outputs power to the first wheel of the hybrid power automobile through the clutch; and   the power motor is configured to output a drive force to the second wheel of the hybrid power automobile.   
     
     
         18 . The power system of a hybrid power automobile according to  claim 3 , wherein the DC-DC converter is further connected to the power motor through the second controller. 
     
     
         19 . The power system of a hybrid power automobile according to  claim 18 , wherein the DC-DC converter is further connected to a first electric appliance device and a low-voltage storage battery of the hybrid power automobile to supply power to the first electric appliance device and the low-voltage storage battery, and the low-voltage storage battery is further connected to the first electric appliance device. 
     
     
         20 . The power system of a hybrid power automobile according to  claim 19 , wherein the first controller, the second controller, and the power battery are further respectively connected to a second electric appliance device of the hybrid power automobile.