Hybrid power driving system and hybrid power vehicle

Abstract

The invention provides a hybrid power driving system and a hybrid power vehicle, and relates to the technical field of hybrid power vehicles. The hybrid power driving system comprises an engine and a motor. The engine is provided with an input shaft. The electric motor includes a stator, a rotor selectively connected to the input shaft via a first clutch, and a drive shaft selectively connected to the rotor via a second clutch. According to the hybrid power driving system provided by the embodiment of the invention, one set of motor is matched with the engine to simultaneously realize power generation and driving functions of the motor, double motors are not required to respectively generate power and drive, an electric driving assembly is not required to be additionally mounted for electric driving, the equipment cost is reduced, and the working efficiency is improved. And the design requirements of light weight and space optimization are met. In addition, the function that the engine participates in driving is reserved, and the driving requirements of a user for the vehicle in different use scenes are met.

Description

Technical Field

[0001] The present application relates to the technical field of hybrid electric vehicles, and in particular to a hybrid electric drive system and a hybrid electric vehicle. Background Art

[0002] At present, there are two main types of extended-range four-wheel drive system models. The first is a single-motor system with an engine assembly, which is only used to achieve the extended-range power generation function; the second is a dual-motor system with an engine assembly, in which the first motor is connected to the engine via a transmission structure to generate electricity, and the second motor is connected to the drive shaft through an internal transmission structure to drive the wheels.

[0003] When developing an extended-range four-wheel drive model, if a single generator system is selected, an additional electric drive assembly must be installed in the front cabin. This solution has a low system integration and high requirements for cabin layout space. It will not only occupy the space inside the vehicle, but may also affect the collision safety of the vehicle. Although the dual-motor system can take into account both layout space and functional requirements, it also requires the addition of a motor system, so that the motor controller must control the dual motors, resulting in a significant increase in system costs. Moreover, in this case, the front drive motor is usually only used as an auxiliary drive, and the actual utilization rate is not high. Summary of the invention

[0004] The embodiments of the present application provide a hybrid power drive system and a hybrid power vehicle, which can reduce costs while taking into account layout space and functional requirements.

[0005] In some embodiments, a hybrid drive system is provided, including an engine and an electric motor, wherein the engine has an input shaft; the electric motor includes a stator, a rotor, and a drive shaft, the rotor is selectively connected to the input shaft via a first clutch, and the drive shaft is selectively connected to the rotor via a second clutch; the hybrid drive system includes a first operating mode, a second operating mode, and a third operating mode, wherein in the first operating mode, the first clutch is engaged and the second clutch is disengaged, and the electric motor can convert mechanical energy into electrical energy for power generation; in the second operating mode, the first clutch is disengaged and the second clutch is engaged, and the electric motor can convert electrical energy into mechanical energy for driving; in the third operating mode, the first clutch and the second clutch are disengaged, the electric motor does not work, and the engine can be driven.

[0006] In some embodiments, a planetary gear mechanism is further included, the planetary gear mechanism including a ring gear, a sun gear, a planet carrier and a planet gear, the ring gear is drivingly connected to the sun gear through the planet gear, the planet carrier is rotatably connected to the planet gear, the planet carrier is drivingly connected to the drive shaft, the sun gear is drivingly connected to the input shaft, the planet carrier is connected to a first brake, and the sun gear is connected to a second brake; wherein,

[0007] In the first working mode, locking or releasing the first brake, and releasing the second brake;

[0008] In the second working mode, releasing the first brake, and releasing or locking the second brake;

[0009] In the third working mode, the first brake is locked and the second brake is released.

[0010] In some embodiments, the first operating mode includes an electric motor generating mode and an engine driven and generating mode, wherein, in the electric motor generating mode, the first clutch is engaged, the second clutch is disengaged, and the first brake and the second brake are released; and in the engine driven and generating mode, the first clutch is engaged, the second clutch is disengaged, the first brake is locked, and the second brake is released.

[0011] In some embodiments, the second operating mode includes a single motor drive mode and an engine and motor synchronous drive mode, wherein, in the single motor drive mode, the first clutch is disengaged, the second clutch is engaged, the first brake is released and the second brake is locked; in the engine and motor synchronous drive mode, the first clutch is disengaged, the second clutch is engaged, and the first brake and the second brake are released.

[0012] In some embodiments, the ring gear includes an inner ring gear and an outer ring gear, the inner ring gear is meshed with the planetary gear, the outer ring gear is connected to the wheel, and the rotation of the ring gear can drive the wheel to rotate.

[0013] In some embodiments, a differential is connected between the ring gear and the wheels.

[0014] In some embodiments, the drive shaft is a hollow shaft, and the input shaft of the engine passes through the drive shaft and is connected to the sun gear in the planetary gear mechanism.

[0015] In some embodiments, the input shaft includes a first section and a second section, the second section is inserted into the drive shaft, the input shaft is selectively connected to the rotor in the first section, the first clutch is used to engage or disengage the first section and the rotor, and the diameter of the first section is greater than the diameter of the second section.

[0016] In some embodiments, the first brake is located on the side of the planetary gear mechanism facing the motor, and the first brake is connected to the drive shaft and / or the planetary carrier to directly or indirectly control the planetary carrier; the second brake is located on the side of the planetary gear mechanism away from the motor, and the second brake is connected to the sun gear and / or the input shaft to directly or indirectly control the sun gear.

[0017] In some embodiments, the hybrid drive system further includes a battery pack, and the electric motor is connected to the battery pack.

[0018] In some embodiments, a hybrid vehicle is provided, comprising a vehicle body and the above-mentioned hybrid drive system disposed on the vehicle body.

[0019] The hybrid drive system provided in the embodiment of the present application uses a set of electric motors to cooperate with the engine to realize the electric motor power generation and driving functions at the same time, without using dual motors to generate power and drive separately, and no additional electric drive assembly is required for electric drive, which reduces the equipment cost, realizes the design requirements of lightweight and space optimization, and can provide the whole vehicle with better endurance and more sufficient space. In addition, the function of the engine participating in the drive is retained to meet the user's driving needs for the vehicle in different usage scenarios, which can adapt to the needs of extended-range models and plug-in hybrid models, and can also meet the needs of extended-range four-wheel drive vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a schematic diagram of the structure of a hybrid power drive system in some embodiments of the present application;

[0022] Figure 2 is a structural schematic diagram of a hybrid power drive system in another embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of the structure of a hybrid vehicle in some embodiments of the present application.

[0024] In the above drawings:

[0025] 10. Engine; 11. Input shaft; 111. First section; 112. Second section;

[0026] 20. Electric motor; 21. Stator; 22. Rotor; 23. Drive shaft;

[0027] 30. Planetary gear mechanism; 31. Planet carrier; 32. Ring gear; 321. Inner ring gear; 322. Outer ring gear; 33. Planetary gear; 34. Sun gear;

[0028] 41. First clutch; 42. Second clutch; 43. First brake; 44. Second brake;

[0029] 50. Differential; 60. Wheels; 70. Battery pack; 80. Processor; 90. Vehicle body. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0031] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] See also Figure 1 , Figure 1 : is a structural schematic diagram of a hybrid power drive system in some embodiments of the present application. The embodiment of the present application provides a hybrid power drive system, including an engine 10, an electric motor 20 and a planetary gear mechanism 30. Among them, the engine 10 has an input shaft 11, and the electric motor 20 includes a stator 21, a rotor 22 and a drive shaft 23. It can be understood that the stator 21 of the electric motor 20 includes a winding, a stator core and an end cover, wherein the winding is wound on the core. When the current flows through the winding of the stator 21, under the action of the magnetic field, the magnetic flux in the stator core changes accordingly, thereby affecting the current and magnetic flux on the rotor 22. In order to reduce eddy current losses, the stator core is usually made of silicon steel sheets. The rotor 22 of the electric motor 20 mainly includes a rotor 22 core and a conductor. When working, the rotor 22 core is arranged relative to the stator core, and the two interact through a magnetic field. When the rotor 22 rotates, its conductor cuts the magnetic lines of force, and generates current and magnetic flux changes under the action of electromagnetic induction. Finally, relying on the action of electromagnetic force, the process of converting mechanical energy into electrical energy or electrical energy into mechanical energy is realized. The motor 20 in the present application is a multiplexed motor, and the motor 20 can realize power generation and driving functions.

[0034] The rotor 22 is selectively connected to the input shaft 11 through the first clutch 41, and the first clutch 41 can control the separation and engagement of the rotor 22 and the input shaft 11. The drive shaft 23 is selectively connected to the rotor 22 through the second clutch 42, and the second clutch 42 can control the separation and engagement of the rotor 22 and the drive shaft 23.

[0035] In the present application, by connecting the first clutch 41 and the second clutch 42 to the rotor 22 of the motor 20, the linkage between the rotor 22 and the input shaft 11 of the engine 10 and the drive shaft 23 of the motor 20 can be realized in different working modes. The hybrid drive system includes a first working mode, a second working mode and a third working mode, wherein in the first working mode, the first clutch 41 is engaged and the second clutch 42 is disengaged, and the motor 20 can convert mechanical energy into electrical energy for power generation; in the second working mode, the first clutch 41 is disengaged and the second clutch 42 is engaged, and the motor 20 can convert electrical energy into mechanical energy for driving; in the third working mode, the first clutch 41 and the second clutch 42 are disengaged, the motor 20 does not work, and the engine 10 can be driven.

[0036] By adopting the above scheme, a set of electric motors 20 is used to cooperate with the engine 10 to realize the power generation and driving functions of the electric motor 20 at the same time. There is no need to use dual motors for power generation and driving respectively, and there is no need to install an additional electric drive assembly for electric driving, which reduces the equipment cost, realizes the design requirements of lightweight and space optimization, and can provide the whole vehicle with better endurance and more sufficient space. In addition, the function of the engine 10 participating in the driving is retained to meet the user's driving needs for the vehicle in different usage scenarios, which can adapt to the needs of extended-range models and plug-in hybrid models, and can also meet the needs of extended-range four-wheel drive vehicles.

[0037] See also Figure 2 , Figure 2 : is a schematic diagram of the structure of a hybrid power drive system in another embodiment of the present application. In some embodiments, the hybrid power drive system further includes a battery pack 70, and the motor 20 is connected to the battery pack 70. An inverter is connected between the motor 20 and the battery pack 70, and the motor 20 can convert mechanical energy into electrical energy. The generated electrical energy can be converted into direct current by the inverter and then stored in the battery pack 70 for standby or the electrical energy can be converted into mechanical energy to rotate the drive shaft 23.

[0038] In some embodiments, the hybrid drive system further includes a planetary gear mechanism 30, which includes a ring gear 32, a sun gear 34, a planet carrier 31, and a planet gear 33. The ring gear 32 is connected to the sun gear 34 through the planet gear 33, and the ring gear 32 is connected to the wheel 60. The rotation of the ring gear 32 can drive the wheel 60 to move. The planet carrier 31 is connected to the planet gear 33 in rotation, and the planet carrier 31 is connected to the drive shaft 23 in transmission. The planet carrier 31 is connected to the first brake 43, and the first brake 43 can lock the planet carrier 31. The sun gear 34 is connected to the input shaft 11 in transmission, and the sun gear 34 is connected to the second brake 44, and the second brake 44 can lock the sun gear 34. Optionally, the sun gear 34 is splined to the input shaft 11, and the planet carrier 31 can be splined to the drive shaft 23. The spline matching method is simple and the connection is reliable. In other embodiments, the sun gear 34 and the input shaft 11 may be integrally formed, and the planet carrier 31 and the drive shaft 23 may also be integrally formed, thereby simplifying the overall structure and the assembly process.

[0039] In the first working mode, the first brake 43 is locked or released, and the second brake 44 is released; in the second working mode, the first brake 43 is released, and the second brake 44 is released or locked; in the third working mode, the first brake 43 is locked and the second brake 44 is released.

[0040] Optionally, the first working mode includes a single motor 20 power generation mode and an engine 10 driven and power generation mode, wherein in the single power generation mode, the engine 10 can be started in the parking condition, and when the battery pack 70 is low in power, the engine 10 outputs mechanical energy to the motor 20, and the motor 20 converts the mechanical energy into electrical energy and stores it in the battery pack 70. Specifically, the first clutch 41 is engaged, the second clutch 42 is disengaged, and the first brake 43 and the second brake 44 are released. At this time, the input shaft 11 of the engine 10 will drive the sun gear 34, the planetary carrier 31 and the planetary gear 33 to idle, and will not transmit torque to the ring gear 32 assembly. The input shaft 11 of the engine 10 is coupled to the rotor 22 of the motor 20 through the first clutch 41, driving the rotor 22 to rotate and transmit mechanical energy to the rotor 22 of the motor 20. The rotor 22 of the motor 20 rotates relative to the stator 21, converts mechanical energy into electrical energy, and transmits it to the inverter. After conversion by the inverter, the electrical energy is stored in the battery pack 70 for subsequent use.

[0041] In the engine 10 driving and generating mode, charging can be performed during driving. When the engine 10 driving and generating mode is turned on, the engine 10 will always operate in its optimal fuel efficiency range. According to the power demand of the motor 20, the mechanical energy output by the engine 10 is reasonably distributed: a part is transmitted to the rotor 22 of the motor 20 through the input shaft 11, and the motor 20 converts this part of the mechanical energy into electrical energy; the other part is used to provide the power required for the vehicle to start and drive. Specifically, the first clutch 41 is engaged, the second clutch 42 is disengaged, the first brake 43 is locked, and the second brake 44 is released. Among them, in the electric energy conversion path, the input shaft 11 of the engine 10 drives the rotor 22 of the motor 20 to rotate through the first clutch 41, and the motor 20 receives the mechanical energy from the engine 10 and converts it into electrical energy, which is stored in the battery pack 70 in the form of direct current after rectification by the inverter for standby. In the power transmission path, since the second clutch 42 is disengaged, the power transmission between the drive shaft 23 and the rotor 22 of the motor 20 is cut off, so the drive shaft 23 will not rotate with the rotation of the rotor 22, and the planet carrier 31 is locked synchronously by locking the first brake 43. The engine 10 drives the sun gear 34 to rotate through the input shaft 11. Since the planet carrier 31 is locked, the sun gear 34 can drive the ring gear 32 to rotate through the planet gear 33 and then drive the vehicle through the ring gear 32.

[0042] Optionally, the second working mode includes a single motor driving mode and a synchronous driving mode of the engine 10 and the motor 20, wherein in the single motor driving mode, the engine 10 does not work, the battery pack 70 discharges, and the DC power is converted into three-phase AC power by the inverter to drive the rotor 22 of the motor 20 to rotate. Specifically, the motor 20 converts electrical energy into mechanical energy to rotate the rotor 22, the first clutch 41 is separated and cuts off the power transmission between the rotor 22 and the input shaft 11, and the second brake 44 is controlled to lock at the same time, and the sun gear 34 is locked synchronously. The second clutch 42 is engaged, and the rotor 22 transmits power to the drive shaft 23 through the second clutch 42. The first brake 43 is released so that the drive shaft 23 can drive the planetary carrier 31 to rotate, and the planetary carrier 31 drives the planetary gear 33 to rotate. Since the sun gear 34 is locked, the planetary gear 33 can drive the ring gear 32 to rotate, and the ring gear 32 drives the wheel 60 to rotate to complete the driving. The motor 20 can rotate both forward and reverse. When rotating forward, the vehicle moves forward, and when rotating reversely, the reversing function in the single motor driving mode is realized.

[0043] In the synchronous driving mode of the engine 10 and the motor 20, that is, the engine 10 and the motor 20 work together to jointly drive the vehicle to travel, which can output a large power and improve the power of the whole vehicle. Specifically, the first clutch 41 is separated to avoid interference between the rotor 22 of the motor 20 and the input shaft 11 of the engine 10 when the motor 20 is driven. The first brake 43 and the second brake 44 are released so that the planetary carrier 31 and the sun gear 34 can both rotate. The battery pack 70 is controlled to discharge, the motor 20 converts electrical energy into mechanical energy to rotate the rotor 22, and the second clutch 42 is engaged so that the rotor 22 can drive the drive shaft 23 to rotate, and then the drive shaft 23 drives the planetary carrier 31 to rotate; the engine 10 is controlled to work, and the sun gear 34 is driven to rotate through the input shaft 11. At this time, the sun gear 34 and the planetary carrier 31 are both rotating, driving the ring gear 32 to rotate, and the ring gear 32 then drives the wheel 60 to rotate, completing the simultaneous driving of the engine 10 and the motor 20. It is understandable that the motor 20 and the engine 10 can respectively control the rotation direction and rotation speed of the drive shaft 23 and the input shaft 11 , thereby controlling the rotation direction and rotation speed of the sun gear 34 and the planetary carrier 31 , and further controlling the rotation direction and speed of the sun gear 34 .

[0044] In the third working mode, the engine 10 is working, while the motor 20 is not working, and the engine 10 alone provides power to drive the vehicle to start and travel. Specifically, the first clutch 41 and the second clutch 42 are separated, and the power transmission between the motor 20 and the planetary gear mechanism 30 is cut off. The first brake 43 is controlled to be locked, and the planetary carrier 31 is locked synchronously, and the planetary carrier 31 will not rotate. Release the second brake 44, and the sun gear 34 can rotate. Control the engine 10 to rotate, and the input of the engine 10 drives the sun gear 34 to rotate. Since the planetary carrier 31 is locked, the sun gear 34 can drive the ring gear 32 to rotate through the planetary gear 33, and the ring gear 32 then drives the wheel 60 to rotate, completing the drive of the engine 10. The engine 10 can rotate both forward and reverse. When rotating forward, the vehicle moves forward, and when reversing, the reversing function in the third working mode is realized.

[0045] It should be noted that the planet carrier 31 is transmission-connected with the drive shaft 23, the planetary gear 33 is rotationally connected with the planet carrier 31, and the planetary gear 33 can not only rotate on its own, but also revolve around the sun gear 34 driven by the planet carrier 31. Specifically, the planet carrier 31 includes a first end and a second end, the first end is parallel and collinear with the axis of the drive shaft 23, the second end is parallel and non-coincident with the axis of the drive shaft 23, a force arm is formed between the first end and the second end, and the planetary gear 33 is rotationally connected with the second end of the planet carrier 31. The first end can rotate driven by the drive shaft 23, thereby driving the second end to rotate around the drive shaft 23, that is, the planetary gear 33 revolves around the sun gear 34. The planetary gear 33 can also rotate around the second end, that is, the planetary gear 33 can rotate on its own.

[0046] Optionally, there are multiple planetary gears 33, for example, there can be three, four, etc., multiple planetary gears 33 are arranged in a circular array with the axis of the sun gear 34 as the center, and each planetary gear 33 is respectively meshed with the outer edge of the sun gear 34 and the inner edge of the ring gear 32.

[0047] See also Figure 1 In some embodiments, the ring gear 32 structure includes an inner ring gear 321 and an outer ring gear 322. The inner ring gear 321 is meshed with the planetary gear 33, while the outer ring gear 322 is connected to the wheel 60, so that the rotation of the ring gear 32 can drive the wheel 60 to operate. In order to further improve the stability of the internal gear transmission of the planetary gear mechanism 30 (i.e., improve NVH performance: noise, vibration and harshness), reduce transmission errors and extend service life, the sun gear 34, the planetary gear 33 and the inner ring gear 321 are all in the form of helical gears. Such design optimization not only helps to ensure that the operation of the entire system is smoother and quieter, but also effectively improves its reliability and durability.

[0048] Optionally, a differential 50 is connected between the ring gear 32 and the wheel 60. The differential 50 is a device that can make the left and right (or front and rear) wheels 60 rotate at different speeds under the drive of the outer ring gear 322. When the vehicle turns or drives on an uneven road, the wheels 60 on both sides are ensured to perform pure rolling motion, thereby ensuring the stability and flexibility of the vehicle. The differential 50 is a structure familiar to those skilled in the art and will not be described in detail here.

[0049] In some embodiments, the drive shaft 23 is a hollow shaft, and the input shaft 11 of the engine 10 passes through the drive shaft 23 and is connected to the sun gear 34 in the planetary gear mechanism 30 .

[0050] Specifically, the input shaft 11 includes a first section 111 and a second section 112 . The second section 112 passes through the drive shaft 23 . The input shaft 11 is selectively connected to the rotor 22 at the first section 111 . The first clutch 41 is used to engage or disengage the first section 111 and the rotor 22 .

[0051] In the related art, high-speed motors need to be equipped with high-speed bearings. The performance of high-speed bearings is limited by their linear speed, which results in that the bearing size cannot be made larger, and thus requires that the shaft of the high-speed motor must be thinner, usually with a diameter not exceeding 35 mm. On the other hand, considering that the motor shaft needs to withstand the direct impact of the clutch, and in order to meet the requirements of the clutch standard spline, the shaft diameter of the high-speed motor often needs to reach more than 50 mm. Therefore, there is a problem of conflicting requirements for the thickness of the shaft diameter between the high-speed motor and the clutch. Specifically, in this embodiment, if the diameter of the input shaft 11 of the engine 10 is increased to enhance its strength, the drive shaft 23 of the motor 20 will also become thicker accordingly, which will hinder the high-speed operation of the motor 20 and is not conducive to reducing weight and cost; on the contrary, if the diameter of the input shaft 11 is reduced, although it can meet the requirements of high speed, it makes it difficult for the input shaft 11 to withstand the direct impact from the first clutch 41, which is easy to cause the input shaft 11 to deform, and may even scratch the hollow drive shaft 23, thereby affecting the reliability and durability of the entire structure.

[0052] In view of the above defects, the present embodiment divides the input shaft 11 into a first section 111 and a second section 112, and enables the first section 111 and the second section 112 to be detachably connected. In this way, the radial dimensions of the first section 111 and the second section 112 can be set independently, and when one section is deformed or damaged, only the corresponding component can be replaced, without replacing the input shaft 11 as a whole. The first section 111 and the second section 112 can be connected by a spline. The diameter of the first section 111 is larger than the diameter of the second section 112. By increasing the radial dimension of the first section 111, its structural strength is improved to ensure that it can withstand the direct impact from the first clutch 41 without deformation; at the same time, the radial dimension of the second section 112 is reduced to meet the requirements of the high-speed bearing for the linear speed. This design not only achieves effective control of cost and weight, but also ensures the reliability and durability of the structure, and is also easy to assemble.

[0053] In some embodiments, the first brake 43 is located on the side of the planetary gear mechanism 30 facing the motor 20, and the first brake 43 is connected to the drive shaft 23 and / or the planet carrier 31 to directly or indirectly control the planet carrier 31; the second brake 44 is located on the side of the planetary gear mechanism 30 away from the motor 20, and the second brake 44 is connected to the sun gear 34 and / or the input shaft 11 to directly or indirectly control the sun gear 34. It can be understood that since the drive shaft 23 is connected to the planet carrier 31 in a transmission manner, the first brake 43 can directly lock or release the planet carrier 31, and the first brake 43 can also indirectly control the planet carrier 31 by controlling the drive shaft 23. Similarly, since the sun gear 34 is connected to the input shaft 11 in a transmission manner, the second brake 44 can directly lock or release the sun gear 34, and can also indirectly control the sun gear 34 by controlling the input shaft 11. The first brake 43 and the second brake 44 may be friction brakes. The first brake 43 and the second brake 44 are respectively located on opposite sides of the planetary gear mechanism 30 to optimize the layout space and facilitate assembly.

[0054] See also Figure 3 , Figure 3 is a schematic diagram of the structure of a hybrid vehicle in some embodiments of the present application. In some embodiments, based on the same inventive concept, a hybrid vehicle is provided, including a vehicle body 90 and a hybrid driving system in any of the above embodiments arranged on the vehicle body 90. Figure 3 As shown, the motor 20 and the engine 10 of the hybrid drive system are located at the front end of the vehicle body 90, and the battery pack 70 is provided at the rear end of the vehicle body 90. The battery pack 70 can discharge and convert the electrical energy into mechanical energy through the motor 20 to drive the wheels 60 to roll; the motor 20 and the engine 10 can also cooperate to charge the battery pack 70 for subsequent use; at the same time, the engine 10 can also drive the wheels 60 to roll.

[0055] The hybrid vehicle also includes a processor 80, which can automatically control the working mode of the hybrid drive system. The processor 80 is configured to switch the hybrid drive system to the second working mode when the power of the battery pack 70 is greater than or equal to the preset power. At this time, the power of the battery pack 70 is sufficient, and the electric energy of the battery pack 70 can be consumed to provide the required power for the vehicle body 90. In addition, the engine 10 can be involved in the driving according to user needs. When the power of the battery pack 70 is less than the preset power, the hybrid drive system is switched to the first working mode. At this time, the power of the battery pack 70 is insufficient, the battery pack 70 can be charged, and the vehicle body 90 can be driven by the engine 10 according to user needs.

[0056] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A hybrid power drive system, characterized in that: include: an engine having an input shaft; an electric motor, the electric motor comprising a stator, a rotor, and a drive shaft, the rotor being selectively connectable to the input shaft via a first clutch, and the drive shaft being selectively connectable to the rotor via a second clutch; The hybrid drive system includes a first working mode, a second working mode and a third working mode, wherein: In the first working mode, the first clutch is engaged and the second clutch is disengaged, and the motor can convert mechanical energy into electrical energy to generate electricity; In the second working mode, the first clutch is disengaged and the second clutch is engaged, and the motor can convert electrical energy into mechanical energy for driving; In the third working mode, the first clutch and the second clutch are separated, the electric motor does not work, and the engine can be driven.

2. The hybrid drive system according to claim 1, characterized in that: It also includes a planetary gear mechanism, which includes a ring gear, a sun gear, a planet carrier and a planet gear, wherein the ring gear is drivingly connected to the sun gear through the planet gear, the planet carrier is rotatably connected to the planet gear, the planet carrier is drivingly connected to the drive shaft, the sun gear is drivingly connected to the input shaft, the planet carrier is connected to a first brake, and the sun gear is connected to a second brake; wherein, In the first working mode, locking or releasing the first brake, and releasing the second brake; In the second working mode, releasing the first brake, and releasing or locking the second brake; In the third working mode, the first brake is locked and the second brake is released.

3. The hybrid drive system according to claim 2, characterized in that: The first working mode includes a motor power generation mode and an engine drive and power generation mode, wherein: In the motor generating mode, engaging the first clutch, disengaging the second clutch, and releasing the first brake and the second brake; In the engine driving and power generation mode, the first clutch is engaged, the second clutch is disengaged, the first brake is locked, and the second brake is released.

4. The hybrid drive system according to claim 3, characterized in that: The second working mode includes a single motor driving mode and an engine and motor synchronous driving mode, wherein: In the single-motor driving mode, the first clutch is disengaged, the second clutch is engaged, the first brake is released, and the second brake is locked; In the engine and motor synchronous driving mode, the first clutch is disengaged, the second clutch is engaged, and the first brake and the second brake are released.

5. The hybrid power drive system according to any one of claims 2 to 4, characterized in that: The gear ring includes an inner ring gear and an outer ring gear, the inner ring gear is meshed with the planetary gear, the outer ring gear is connected to the wheel, and the rotation of the gear ring can drive the wheel to rotate.

6. The hybrid drive system according to claim 5, characterized in that: A differential is connected between the ring gear and the wheels.

7. The hybrid power drive system according to any one of claims 2 to 4, characterized in that: The driving shaft is a hollow shaft, and the input shaft of the engine passes through the driving shaft and is connected with the sun gear in the planetary gear mechanism.

8. The hybrid power drive system according to claim 7, characterized in that: The input shaft includes a first section and a second section, the second section is inserted into the drive shaft, the input shaft is selectively connected to the rotor at the first section, the first clutch is used to engage or disengage the first section and the rotor, and the diameter of the first section is greater than the diameter of the second section.

9. The hybrid power drive system according to any one of claims 2 to 4, characterized in that: The first brake is located on the side of the planetary gear mechanism facing the motor, and the first brake is connected to the drive shaft and / or the planetary carrier to directly or indirectly control the planetary carrier; the second brake is located on the side of the planetary gear mechanism away from the motor, and the second brake is connected to the sun gear and / or the input shaft to directly or indirectly control the sun gear.

10. The hybrid drive system according to any one of claims 1 to 4, characterized in that: A battery pack is also included, and the electric motor is connected to the battery pack.

11. A hybrid vehicle, characterized in that: The invention comprises a vehicle body and a hybrid power drive system as claimed in any one of claims 1 to 10 arranged on the vehicle body.

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