A new energy vehicle and its electric drive axle system

Abstract

A new energy vehicle and an electric drive axle system thereof, the new energy vehicle comprising left and right drive wheels, a control device and an electric drive axle system, the electric drive axle system comprising: a drive axle bracket; left and right transmission mechanisms symmetrically arranged on the drive axle bracket and correspondingly connected to the left and right drive wheels; a hybrid motor mounted on the drive axle bracket and respectively connected to the left and right transmission mechanisms; left and right drive motors mounted on the drive axle bracket and respectively connected to the corresponding left and right transmission mechanisms, the hybrid motors being respectively connected to the corresponding left and right drive motors through the left and right transmission mechanisms; and left and right oil cooling radiators, the left oil cooling radiator being respectively connected to the left drive motor and the hybrid motor, the right oil cooling radiator being respectively connected to the right drive motor and the hybrid motor, the left and right drive motors being connected through cooling pipes.

Description

Technical Field

[0001] The invention relates to an electric vehicle driving device, in particular to a new energy vehicle and an electric drive axle system thereof. Background Art

[0002] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a single motor electric drive bridge in the prior art. Figure 2 The figure is a schematic diagram of the structure of the dual-motor electric drive bridge in the prior art. The mainstream electric drive bridge systems used in pure electric vehicles are classified according to the number of motors, and there are two types of electric drive bridges: single-motor and dual-motor. Figure 1 ), mainly based on the traditional axle to integrate the motor on the axle, that is, centralized drive, using traditional mechanical differential; while the dual-motor electric drive axle can achieve distributed drive (see Figure 2 ), two motors are arranged on the left and right sides of the axle, and the two motors are responsible for driving the two wheels respectively, using electronic differential. In terms of transmission efficiency, electronic differential is obviously much more efficient than mechanical differential. The above two electric drive axles, whether single motor or dual motor, have the following disadvantages:

[0003] 1. The two driving modes of single motor or dual motor distributed drive can only provide two states: driving and braking. The motor only plays the role of driving and braking (energy feedback). The power of the whole vehicle cannot be further improved. At the same time, the energy of the vehicle is not fully utilized during driving, and the cruising range is short;

[0004] 2. The cooling method used by the motor is mainly water cooling, which has low cooling efficiency and the entire cooling system is bulky. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a new energy vehicle and an electric drive axle system thereof in view of the above-mentioned defects of the prior art, which can improve the vehicle power and endurance.

[0006] In order to achieve the above object, the present invention provides an electric drive axle system for a new energy vehicle, which includes:

[0007] Drive axle bracket;

[0008] The left and right transmission mechanisms are symmetrically arranged on the drive axle bracket and are correspondingly connected to the left and right drive wheels of the new energy vehicle;

[0009] A hybrid motor is mounted on the drive axle bracket and is connected to the left and right transmission mechanisms respectively;

[0010] The left and right drive motors are respectively mounted on the drive axle bracket and are respectively connected to the corresponding left and right transmission mechanisms, and the hybrid motor is respectively connected to the corresponding left and right drive motors through the left and right transmission mechanisms; and

[0011] A left and a right oil cooling radiator, wherein the left oil cooling radiator is connected to the left drive motor and the hybrid motor respectively, and the right oil cooling radiator is connected to the right drive motor and the hybrid motor respectively, and the left and right drive motors are connected via a cooling pipeline.

[0012] The electric drive axle system of the above-mentioned new energy vehicle also includes an oil pump integrated with the left and right oil cooling radiators respectively. The cooling oil in the oil pump flows to the hybrid motor through the left oil cooling radiator, and then flows through the right oil cooling radiator, the right drive motor and the right transmission mechanism in sequence, flows back to the right drive motor and flows into the left drive motor and the left transmission mechanism in sequence through the cooling pipeline, and then flows through the left drive motor and finally flows back to the left oil cooling radiator.

[0013] The electric drive axle system of the above-mentioned new energy vehicle, wherein the hybrid motor includes a hybrid motor housing, an outer stator, a first hybrid rotor and a second hybrid rotor, the outer stator is arranged in the hybrid motor housing and close to the inner wall of the housing, the first hybrid rotor is located in the outer stator, the second hybrid rotor is located in the first hybrid rotor and connected to the first hybrid rotor, and the output shaft of the second hybrid rotor is located on the same axis as the output shaft of the first hybrid rotor.

[0014] The electric drive axle system of the above-mentioned new energy vehicle, wherein the first hybrid rotor includes a first rotor core, the first rotor core is a cylindrical structure with one end open, and permanent magnet layers are laid on the inner wall and outer wall of the cylinder of the first rotor core. One end of the output shaft of the first hybrid rotor is installed on the hybrid motor housing through a support bearing, and the other end of the output shaft of the first hybrid rotor is connected to the second hybrid rotor.

[0015] The above-mentioned electric drive axle system of the new energy vehicle, wherein the second hybrid rotor includes a second rotor core and a rotor winding wound on the second rotor core, the output shaft of the second hybrid rotor and the second rotor core are an integral structure, and the other end of the output shaft of the first hybrid rotor is installed on the second rotor core through a bearing.

[0016] The electric drive axle system of the above-mentioned new energy vehicle, wherein the left and right transmission mechanisms respectively include a transmission housing and a first gear, a second gear, a third gear, a fourth gear and a fifth gear installed in the transmission housing, the first gear is connected to the output shaft of the corresponding left or right drive motor, the second gear is respectively meshed with the first gear and the third gear, the third gear is respectively meshed with the fourth gear and the fifth gear, the fourth gear is connected to the hybrid motor, and the fifth gear is connected to the corresponding left or right drive wheel.

[0017] The electric drive axle system of the above-mentioned new energy vehicle, wherein the fourth gear of the left transmission mechanism is connected to the output shaft of the second hybrid rotor of the hybrid motor through the left transmission half shaft, and the fourth gear of the right transmission mechanism is connected to the output shaft of the first hybrid rotor of the hybrid motor through the right transmission half shaft.

[0018] In the electric drive axle system of the above-mentioned new energy vehicle, the left and right drive wheels use electronic differentials to achieve turning, the left and right drive motors achieve different speed differences according to turning needs, and the hybrid motor follows the left and right drive motors to achieve corresponding speed differences.

[0019] The electric drive axle system of the above-mentioned new energy vehicle, wherein the left and right drive motors and the hybrid motor include three drive modes. In normal mode, the left and right drive motors are driven, and at the same time, the left and right transmission mechanisms transfer part of the power to the hybrid motors, and the hybrid motors generate electricity and charge the on-board power battery; in extreme mode, the left and right drive motors and the hybrid motor are all driven; in high-speed cruising mode, the hybrid motor is driven, and the left and right drive motors generate electricity and charge the on-board power battery to increase the vehicle's cruising range.

[0020] In order to better achieve the above-mentioned purpose, the present invention also provides a new energy vehicle, including left and right drive wheels, a control device and an electric drive axle system, the left and right drive wheels are connected to the electric drive axle system, and the electric drive axle system is connected to the control device, wherein the electric drive axle system is the above-mentioned electric drive axle system, and the left and right drive wheels are respectively connected to the output shafts of the corresponding left and right transmission mechanisms of the electric drive axle system.

[0021] The technical effects of the present invention are:

[0022] The electric drive axle system of the present invention enhances the power requirements of the entire vehicle and increases the cruising range by controlling the working status (driving or generating status) of the three motors; it adopts an overall series oil cooling method, and compared with the water cooling system, there is no need to design a water jacket and other auxiliary components such as a cooling water tank system outside the shell, thereby improving the system integration.

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a single-motor electric drive bridge in the prior art;

[0025] Figure 2 It is a schematic diagram of the structure of a dual-motor electric drive bridge in the prior art;

[0026] Figure 3 A schematic diagram of the structure of a new energy vehicle and its electric drive axle system according to an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the structure of a hybrid motor according to an embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the vehicle turning principle of the present invention.

[0029] Among them, the reference numerals

[0030] 1 Drive axle bracket

[0031] 2 Left drive wheel

[0032] 3 Right drive wheel

[0033] 4 Left transmission mechanism

[0034] 41 Transmission housing

[0035] 42 First Gear

[0036] 43 Second Gear

[0037] 44 Third gear

[0038] 45 Fourth Gear

[0039] 46 Fifth Gear

[0040] 5 Right transmission mechanism

[0041] 6 Left drive motor

[0042] 7 Right drive motor

[0043] 8 Hybrid Motor

[0044] 81 Hybrid motor housing

[0045] 82 External stator

[0046] 83 First mixing rotor

[0047] 831 Output shaft

[0048] 832 First rotor core

[0049] 833 Permanent magnet layer

[0050] 834 Support bearing

[0051] 835 Bearings

[0052] 836 Bearings

[0053] 84 Second mixing rotor

[0054] 841 Output shaft

[0055] 842 Second rotor core

[0056] 843 Rotor Winding

[0057] 844 Bearings

[0058] 9 Left drive axle shaft

[0059] 10 Right drive axle shaft

[0060] 11 Left oil radiator

[0061] 12 Right oil radiator

[0062] 13 Cooling pipe DETAILED DESCRIPTION

[0063] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0064] See also Figure 3 , Figure 3 The schematic diagram of the structure of a new energy vehicle and its electric drive axle system of an embodiment of the present invention. The new energy vehicle of the present invention comprises left and right drive wheels 2, 3, a control device and an electric drive axle system, wherein the left and right drive wheels 2, 3 are connected to the electric drive axle system, and the electric drive axle system is connected to the control device (not shown), and the left and right drive wheels 2, 3 comprise wheel hub mounting bolts, brakes, wheel hubs and tires, and the left and right drive wheels 2, 3 are respectively connected to the output shafts of the corresponding left and right transmission mechanisms 4, 5 of the electric drive axle system, and the composition, structure, mutual position relationship, connection relationship and function of other parts of the new energy vehicle are all relatively mature prior art, so they are not described here in detail, and only the electric drive axle system of the present invention is described in detail below.

[0065] The electric drive axle system of the present embodiment includes: a drive axle bracket 1; left and right transmission mechanisms 4, 5, which are symmetrically arranged on the drive axle bracket 1 and correspondingly connected to the left and right drive wheels 2, 3 of the new energy vehicle; a hybrid motor 8, which is installed on the drive axle bracket 1 and respectively connected to the left and right transmission mechanisms 4, 5, the symmetry center of the hybrid motor 8 coincides with the symmetry center of the drive axle bracket 1, that is, the electric drive axle system is a left-right symmetrical structure; left and right drive motors 6, 7, which are respectively installed on the drive axle bracket 1 and respectively connected to the corresponding left and right transmission mechanisms 4, 5, the hybrid motor 8 is respectively connected to the corresponding left and right drive motors 6, 7 through the left and right transmission mechanisms 4, 5; and left and right oil cooling radiators 11, 12, the left oil cooling radiator 11 is respectively connected to the left drive motor 6 and the hybrid motor 8, the right oil cooling radiator 12 is respectively connected to the right drive motor 7 and the hybrid motor 8, and the left and right drive motors 6, 7 are connected through a cooling pipeline 13. It also includes an oil pump integrated with the left and right oil cooling radiators 11 and 12 respectively. The cooling oil in the oil pump flows to the hybrid motor 8 through the left oil cooling radiator 11, and then flows through the right oil cooling radiator 12, the right drive motor 7 and the right transmission mechanism 5 in sequence, and then flows back to the right drive motor 7 and flows into the left drive motor 6 and the left transmission mechanism 4 in sequence through the cooling pipeline 13, and then flows through the left drive motor 6 and finally flows back to the left oil cooling radiator 11. The left and right transmission mechanisms 4, 5 respectively include a transmission housing 41 and a first gear 42, a second gear 43, a third gear 44, a fourth gear 45 and a fifth gear 46 installed in the transmission housing 41, the first gear 42 is connected to the output shaft of the corresponding left or right drive motor 6 / 7, the second gear 43 is respectively meshed with the first gear 42 and the third gear 44, the third gear 44 is respectively meshed with the fourth gear 45 and the fifth gear 46, the fourth gear 45 is connected to the hybrid motor 8, and the fifth gear 46 is connected to the corresponding left or right drive wheel 2 / 3. The fourth gear 45 of the left and right transmission mechanisms 4 and 5 are connected to the output shaft 841 of the second mixing rotor 84 and the output shaft 831 of the first mixing rotor 83 of the hybrid motor 8 through the corresponding left and right transmission half shafts 9 and 10, respectively, that is, the fourth gear 45 of the left transmission mechanism 4 is connected to the output shaft 841 of the second mixing rotor 84 of the hybrid motor 8 through the left transmission half shaft 9, and the fourth gear 45 of the right transmission mechanism 5 is connected to the output shaft 831 of the first mixing rotor 83 of the hybrid motor 8 through the right transmission half shaft 10. The drive axle bracket 1 plays a supporting and connecting role, the left and right driving wheels 2 and 3 are connected to the output shafts of the left and right transmission mechanisms 4 and 5, and the output shafts of the left and right transmission mechanisms 4 and 5 are spline-connected to the rotor output shaft of the hybrid motor 8 through the left and right ball joint connection and the left and right transmission half shafts 9 and 10, and the left and right transmission mechanisms 4 and 5 form a drive chain loop.Its cooling circuit adopts oil cooling. Figure 3 The middle arrow indicates the flow direction of the cooling oil. The cooling oil first passes through the left oil cooling radiator 11, flows to the hybrid motor 8, and then passes through the right oil cooling radiator 12, the right drive motor 7, and the right transmission mechanism 5, and flows into the left drive motor 6 and the left transmission mechanism 4 through the cooling pipe 13, and finally flows into the left oil cooling radiator 11 through the cooling oil outlet of the left drive motor 6.

[0066] See also Figure 4 , Figure 4 Schematic diagram of the structure of a hybrid motor 8 according to an embodiment of the present invention. The hybrid motor 8 according to this embodiment comprises a hybrid motor housing 81, an outer stator 82, a first hybrid rotor 83 and a second hybrid rotor 84, wherein the outer stator 82 is disposed in the hybrid motor housing 81 and close to the inner wall of the housing, the first hybrid rotor 83 is located in the outer stator 82, the second hybrid rotor 84 is located in the first hybrid rotor 83 and connected to the first hybrid rotor 83, and the output shaft 841 of the second hybrid rotor 84 and the output shaft 831 of the first hybrid rotor 83 are located on the same axis. The first hybrid rotor 83 includes a first rotor core 832, which is a cylindrical structure with one end open. Permanent magnet layers 833 are provided on the inner and outer walls of the cylinder of the first rotor core 832. One end of the output shaft 831 of the first hybrid rotor 83 is mounted on the hybrid motor housing 81 through a support bearing 834, and the other end of the output shaft 831 is connected to the second hybrid rotor 84, that is, the other end of the output shaft 831 of the first hybrid rotor 83 is mounted on the second rotor core 842 through a bearing 835. The second hybrid rotor 84 includes a second rotor core 842 and a rotor winding 843 wound on the second rotor core 842. The output shaft 841 of the second hybrid rotor 84 and the second rotor core 842 are preferably an integral structure. The output shaft 841 of the second hybrid rotor 84 is mounted on the hybrid motor housing 81 through a bearing 844, and the other end of the second hybrid rotor 84 is supported and mounted on the cylindrical end surface of the first rotor core 832 through a bearing 836.

[0067] The stator wire of the outer stator 82 of the hybrid motor 8 of this embodiment and the outer surface permanent magnet layer 833 of the first hybrid rotor 83 form a set of motor mechanisms, and the rotor wire of the second hybrid rotor 84 and the inner surface permanent magnet layer 833 of the first hybrid rotor 83 form another set of motor mechanisms, that is, the rotor wires of the first hybrid rotor 83 and the second hybrid rotor 84 are combined into a motor stator and a rotor, and both are rotatable structures. The first hybrid rotor 83 and the second hybrid rotor 84 are embeddedly installed through bearings 835 and 836, and finally support the first hybrid rotor 83 and the second hybrid rotor 84. The operation of the hybrid motor 8 can be controlled by an electronic control device in the prior art and a high-hybridity software algorithm.

[0068] See also Figure 5 , Figure 5 The figure is a schematic diagram of the vehicle turning principle of the present invention. The present invention uses the left and right drive wheels 2 and 3 to achieve turning by electronic differential. The left and right drive motors 6 and 7 achieve different speed differences according to the turning needs, and the hybrid motor 8 follows the left and right drive motors 6 and 7 to achieve the corresponding speed difference. When the vehicle is turning on a curve, the electronic differential is used to control the rotation speed difference between the left and right drive wheels 2 and 3, that is, the electronic control device controls the left and right drive motors 6 and 7 to achieve different rotation speed differences. At the same time, the first hybrid rotor 83 also follows the left and right drive motors 6 and 7 through the electronic control device to achieve different rotation speed differences, so as to achieve the purpose of the electronic differential. Figure 5 As shown, when turning, the rotation speed of the left driving wheel 2 on the inner side of the curve is less than the rotation speed of the right driving wheel 3 on the outer side of the curve, so that the vehicle can turn. At this time, the rotation speeds of the three motors, the left and right driving motors 6, 7 and the hybrid motor 8, need to be controlled by the electronic control device to achieve the speed difference between the left and right driving wheels 2 and 3. The rotation speed of the left driving wheel 2 on the inner side of the curve is less than the rotation speed of the right driving wheel 3 on the outer side of the curve, that is, the rotation speed of the left driving motor 6 is less than the right driving motor 7. At this time, the electronic control device determines the vehicle state according to the vehicle sensor, controls the rotation speed of the left driving motor 6 to be less than the right driving motor 7, and at the same time, controls the rotation speed of the first hybrid rotor 83 to be greater than the second hybrid rotor 84, so that the vehicle can turn.

[0069] The left and right drive motors 6, 7 and the hybrid motor 8 of the present invention are three power output sources, and the three power sources are coupled and output to the left and right drive wheels 2, 3 through the left and right transmission mechanisms 4, 5 to drive the vehicle to travel. The left and right drive motors 6, 7 include left and right drive motor housings, left and right drive motor stators and left and right drive motor rotors, and the power transmission is completed through the left and right transmission mechanisms 4, 5. The hybrid motor 8 is a shaft output at both ends, and the output shaft 831 of the first hybrid rotor 83 and the output shaft 841 of the second hybrid rotor 84 are respectively connected to the left and right transmission half shafts 9, 10 through splines, and the left and right transmission half shafts 9, 10 are then connected to the left and right transmission mechanisms 4, 5 through the left and right ball joints, so as to realize the power transmission between the hybrid motor 8 and the left and right transmission mechanisms 4, 5.

[0070] The left and right drive motors 6, 7 and the hybrid motor 8 may include three drive modes. In normal mode, the left and right drive motors 6, 7 are driven, and at the same time, the left and right transmission mechanisms 4, 5 transfer part of the power to the hybrid motor 8, and the hybrid motor 8 generates electricity and charges the vehicle-mounted power battery; in extreme mode, the left and right drive motors 6, 7 and the hybrid motor 8 are all driven; in high-speed cruising mode, the hybrid motor 8 is driven, the left and right drive motors 6, 7 are generators, and the vehicle-mounted power battery is charged to increase the vehicle's cruising range.

[0071] Among them, when the left and right drive motors 6 and 7 drive and the hybrid motor 8 generates electricity, the power source is the left and right drive motors 6 and 7, which are driven by the left and right transmission mechanisms 4 and 5. At the same time, the output shafts of the left and right transmission mechanisms 4 and 5 will transfer part of the power to the hybrid motor 8 with the input of the power source. At this time, the hybrid motor 8 is responsible for generating electricity through the electronic control device, charging the vehicle power battery, and improving the vehicle's cruising range. At this time, the electronic control device sets the left and right drive motors 6 and 7 as the driving state instructions, and the power is transmitted to the left and right drive wheels 2 and 3 through the left and right transmission mechanisms 4 and 5. At the same time, the left and right transmission mechanisms 4 and 5 also transmit part of the power to the hybrid motor 8, and the hybrid motor 8 sets the power generation instruction through the electronic control device. At this time, the hybrid motor 8 is in the power generation state and transmits electricity to the vehicle power battery.

[0072] In some extreme conditions, the left and right drive motors 6, 7 and the hybrid motor 8 are all used as drivers, that is, the left drive motor, the right drive motor and the hybrid motor 8 are all in the driving state. The vehicle is in a state where three power sources are superimposed and driven, which can meet stronger power requirements. At this time, the electronic control device sets the left and right drive motors 6, 7 and the hybrid motor 8 as the driving state instructions, and the power is coupled through the left and right transmission mechanisms 4, 5 and then transmitted to the wheels, so that the three motors work simultaneously and achieve the strongest power output.

[0073] When the vehicle is cruising at high speed, the vehicle's power demand is relatively stable, and it can be switched to the hybrid motor 8 drive, and the left and right drive motors 6 and 7 are used as generators to charge the on-board power battery to increase the vehicle's cruising range. At this time, the electronic control device sets the hybrid motor 8 as a driving state instruction, and the power is transmitted to the left and right drive wheels 2 and 3 respectively through the left and right transmission mechanisms 4 and 5. At the same time, the left and right transmission mechanisms 4 and 5 also transmit part of the power to the left and right drive motors 6 and 7 respectively, and the left and right drive motors 6 and 7 are given power generation instructions through the electronic control device. At this time, the left and right drive motors 6 and 7 are in a power generation state and transmit electricity to the on-board power battery.

[0074] The electric drive axle system of the present invention enhances the power requirements of the entire vehicle and increases the cruising range by controlling the working status (driving or generating status) of the three motors; it adopts an overall series oil cooling method, and compared with the water cooling system, there is no need to design a water jacket and other auxiliary components such as a cooling water tank system outside the shell, thereby improving the system integration.

[0075] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An electric drive axle system for a new energy vehicle, characterized in that: include: Drive axle bracket; The left and right transmission mechanisms are symmetrically arranged on the drive axle bracket and are correspondingly connected to the left and right drive wheels of the new energy vehicle; A hybrid motor is mounted on the drive axle bracket and is connected to the left and right transmission mechanisms respectively; The left and right drive motors are respectively mounted on the drive axle bracket and are respectively connected to the corresponding left and right transmission mechanisms, and the hybrid motor is respectively connected to the corresponding left and right drive motors through the left and right transmission mechanisms; as well as Left and right oil cooling radiators, the left oil cooling radiator is connected to the left drive motor and the hybrid motor respectively, the right oil cooling radiator is connected to the right drive motor and the hybrid motor respectively, and the left and right drive motors are connected via a cooling pipeline; Wherein, it also includes an oil pump integrated with the left and right oil cooling radiators respectively, adopting an overall series oil cooling method, the cooling oil in the oil pump flows to the hybrid motor through the left oil cooling radiator, and then flows through the right oil cooling radiator, the right drive motor and the right transmission mechanism in sequence, flows back to the right drive motor and flows into the left drive motor and the left transmission mechanism in sequence through the cooling pipeline, and then flows through the left drive motor and finally flows back to the left oil cooling radiator; The hybrid motor comprises a hybrid motor housing, an outer stator, a first hybrid rotor and a second hybrid rotor, wherein the outer stator is arranged in the hybrid motor housing and close to the inner wall of the housing, the first hybrid rotor is located in the outer stator, the second hybrid rotor is located in the first hybrid rotor and connected to the first hybrid rotor, and the output shaft of the second hybrid rotor is located on the same axis as the output shaft of the first hybrid rotor; the rotor wires of the first hybrid rotor and the second hybrid rotor are combined into a motor stator and a rotor and are both rotatable structures; Three driving modes are realized by controlling the working states of the left and right driving motors and the hybrid motor. In normal mode, the left and right driving motors are driven, and at the same time, the left and right transmission mechanisms transmit part of the power to the hybrid motor, and the hybrid motor generates electricity and charges the on-board power battery; in extreme mode, the left and right driving motors and the hybrid motor are all driven; in high-speed cruising mode, the hybrid motor is driven, and the left and right driving motors generate electricity and charge the on-board power battery to increase the vehicle's cruising range.

2. The electric drive axle system for a new energy vehicle as claimed in claim 1, characterized in that: The first hybrid rotor includes a first rotor core, which is a cylindrical structure with one end open. Permanent magnet layers are provided on the inner and outer walls of the cylinder of the first rotor core. One end of the output shaft of the first hybrid rotor is installed on the hybrid motor housing through a support bearing, and the other end of the output shaft of the first hybrid rotor is connected to the second hybrid rotor.

3. The electric drive axle system for a new energy vehicle as claimed in claim 2, characterized in that: The second hybrid rotor includes a second rotor core and a rotor winding wound on the second rotor core. The output shaft of the second hybrid rotor and the second rotor core are an integral structure. The other end of the output shaft of the first hybrid rotor is mounted on the second rotor core through a bearing.

4. The electric drive axle system for a new energy vehicle as claimed in claim 1, characterized in that: The left and right transmission mechanisms respectively include a transmission housing and a first gear, a second gear, a third gear, a fourth gear and a fifth gear installed in the transmission housing, the first gear is connected to the output shaft of the corresponding left or right drive motor, the second gear is respectively meshed with the first gear and the third gear, the third gear is respectively meshed with the fourth gear and the fifth gear, the fourth gear is connected to the hybrid motor, and the fifth gear is connected to the corresponding left or right drive wheel.

5. The electric drive axle system for a new energy vehicle as claimed in claim 4, characterized in that: The fourth gear of the left transmission mechanism is connected to the output shaft of the second mixing rotor of the hybrid motor through the left transmission half shaft, and the fourth gear of the right transmission mechanism is connected to the output shaft of the first mixing rotor of the hybrid motor through the right transmission half shaft.

6. The electric drive axle system for a new energy vehicle as claimed in claim 5, characterized in that: The left and right driving wheels use electronic differential to achieve turning, the left and right driving motors achieve different speed differences according to turning needs, and the hybrid motor follows the left and right driving motors to achieve corresponding speed differences.

7. A new energy vehicle, comprising left and right drive wheels, a control device and an electric drive axle system, wherein the left and right drive wheels are connected to the electric drive axle system, and the electric drive axle system is connected to the control device, characterized in that: The electric drive axle system is the electric drive axle system according to any one of claims 1 to 6, and the left and right drive wheels are respectively connected to the output shafts of the corresponding left and right transmission mechanisms of the electric drive axle system.

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