Hybrid power transmission device, operating method and vehicle

Abstract

This invention provides a hybrid power transmission device, a working method, and a vehicle, relating to the field of vehicle technology. The hybrid power transmission device, applied in a vehicle, includes a motor, an engine, a planetary gear set, a first clutch, a second clutch, and an output end. Both the first and second clutches are connected to the output end. The planetary gear set includes a planet carrier and a first external gear ring. The motor, the first clutch, and the first external gear ring are all connected to the planet carrier. The first external gear ring is connected to the second clutch. The engine is connected to both the planet carrier and the first clutch. This invention's hybrid power transmission device solves the problems of existing hybrid power devices having only one gear, relying solely on their own performance for power adjustment, requiring high motor performance, and having high costs.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a hybrid power transmission device, operating method, and vehicle. Background Technology

[0002] With the advancement of vehicle electrification and the rapid development of new energy vehicles, hybrid vehicles are increasingly dominating the market due to their lower carbon emissions and longer driving range.

[0003] Existing hybrid power transmission devices are limited by their own structure, have only one gear, and rely on their own performance for power adjustment. This places high demands on the performance of the motor, resulting in high costs for hybrid power transmission devices. Summary of the Invention

[0004] In view of this, this application provides a hybrid power transmission device to solve the problems of existing hybrid power devices having only one gear, relying on their own performance for power adjustment, requiring high motor performance, and having high cost.

[0005] According to a first aspect of this application, a hybrid power transmission device is provided, which is applied in a vehicle. The hybrid power transmission device includes an electric motor, an engine, a planetary gear set, a first clutch, a second clutch, and an output end. The first clutch and the second clutch are both connected to the output end. The planetary gear set includes a planet carrier and a first external gear ring. The electric motor, the first clutch, and the first external gear ring are all connected to the planet carrier. The first external gear ring is connected to the second clutch. The engine is connected to both the planet carrier and the first clutch.

[0006] Preferably, the planetary gear set includes a sun gear and a first planetary gear, the sun gear being connected to the motor, and the first planetary gear meshing with both the planet carrier and the sun gear.

[0007] Preferably, the planetary gear set further includes a second planetary gear, which meshes with the first external gear ring and the planet carrier respectively.

[0008] Preferably, the planetary gear set further includes a housing and a second external gear ring, the first planetary gear is disposed inside the housing, the second external gear ring is fixed to the inner sidewall of the housing, the second external gear ring meshes with the first planetary gear, and the first external gear ring meshes with the second planetary gear.

[0009] Preferably, the hybrid power transmission device further includes a one-way clutch, through which the engine is connected to the planetary carrier and the first clutch respectively.

[0010] According to a second aspect of this application, a method for operating a hybrid power transmission device is provided. The method of operating the hybrid power transmission device applies to the aforementioned hybrid power transmission device and includes engaging one of a first clutch and a second clutch to position the hybrid power transmission device in a first gear or a second gear.

[0011] Preferably, when the hybrid power transmission device is in the first gear, the motor is working, the engine is not working, the first clutch is engaged, and the second clutch is disengaged;

[0012] When the hybrid power transmission device is in the second gear, the electric motor is working, the engine is not working, the second clutch is engaged, and the first clutch is disengaged.

[0013] Preferably, when the hybrid power transmission device is in the first gear, the motor drives the sun gear to rotate, thereby rotating the planetary carrier, so that power is transmitted to the output end via the first clutch.

[0014] Preferably, when the hybrid power transmission device is in the second gear position, the motor drives the sun gear to rotate, causing the planet carrier to rotate. Under the action of the planet carrier and the first planetary gear, the second planetary gear rotates, thereby driving the first external gear ring to rotate, so that the power is transmitted to the output end through the second clutch.

[0015] Preferably, when the hybrid power transmission device is in the first gear or the second gear, the engine starts, and the hybrid power transmission device switches to parallel mode, so that the power of the engine is transmitted to the planetary carrier.

[0016] Preferably, the method of operating the hybrid power transmission device further includes:

[0017] When the engine is running and the electric motor is not running, and the first clutch is engaged, the hybrid power transmission device switches to engine direct drive mode, and the power output by the engine is transmitted to the output end via the first clutch.

[0018] Preferably, the method of operating the hybrid power transmission device further includes:

[0019] When the hybrid power transmission device is in the first gear, the second gear, or the parallel mode, the driver depresses the vehicle's brake pedal, causing the hybrid power transmission device to switch to energy recovery mode. The motor changes from drive mode to power generation mode, and kinetic energy is converted into electrical energy and flows to the power battery via the motor.

[0020] Preferably, the method of operating the hybrid power transmission device further includes:

[0021] When the vehicle is parked or stationary, both the first clutch and the second clutch are disengaged, putting the hybrid power transmission device into a parking power generation mode. The power output from the engine is transmitted to the planetary carrier, causing the first planetary gear and the sun gear to rotate, thereby transmitting power to the electric motor. The kinetic energy is converted into electrical energy by the electric motor and flows to the power battery.

[0022] According to a third aspect of this application, a vehicle is provided, the vehicle including the aforementioned hybrid power transmission device.

[0023] When the hybrid power transmission device of this application is used, multiple gears and modes can be switched through the cooperation of the electric motor, engine, planetary gear set, first clutch and second clutch.

[0024] When the hybrid power transmission device is in the first gear, the first clutch is engaged, the electric motor works, the engine does not work, the electric motor drives the planetary carrier to rotate, so that the power is transmitted to the output end through the first clutch, thereby driving the wheels.

[0025] When the hybrid power transmission device is in the second gear, the second clutch is engaged, the electric motor works, the engine does not work, the electric motor drives the planetary carrier to rotate, thereby driving the first external ring gear to rotate, so that the power is transmitted to the output end through the second clutch, thereby driving the wheels.

[0026] Before the hybrid power transmission device switches to parallel mode, the hybrid power transmission device is in the first or second gear mentioned above. When switching to parallel mode, the engine works, and the power from the engine is transmitted to the planetary carrier to provide assistance for the electric motor drive and participate in the drive.

[0027] When the hybrid power transmission device is in engine direct drive mode, the first clutch is engaged, and the electric motor and engine work. When they are not working, the power output by the engine is transmitted to the output end through the first clutch, thereby driving the wheels.

[0028] When the hybrid power transmission device is in power generation mode, both the first clutch and the second clutch are disengaged, and the power output from the engine is transmitted to the planetary carrier, which in turn transmits the power to the electric motor, thereby driving the electric motor to generate electricity.

[0029] When the hybrid power transmission device is in the first gear, second gear, or parallel mode, if the driver presses the brake pedal, the vehicle detects the driver's braking intention and activates the energy recovery mode. At this time, the motor changes from driving mode to power generation mode, and the energy is converted from kinetic energy into electrical energy, which flows to the power battery for energy recovery.

[0030] The hybrid power transmission device of this application realizes six power transmission modes through a motor, an engine, a planetary gear set, a first clutch, and a second clutch, which reduces the requirements for motor performance and lowers the cost of the hybrid power transmission device. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the structure of a hybrid power transmission device according to an embodiment of the present invention is shown;

[0033] Figure 2 A schematic diagram of the power transmission route of the hybrid power transmission device of the present invention in the first gear position is shown;

[0034] Figure 3 A schematic diagram of the power transmission route of the hybrid power transmission device in the second gear position according to an embodiment of the present invention is shown;

[0035] Figure 4 A schematic diagram showing the power transmission route of the hybrid power transmission device in the third gear position according to an embodiment of the present invention is shown.

[0036] Figure 5 A schematic diagram of the power transmission route of the hybrid power transmission device of the present invention in parallel mode in the first gear position is shown.

[0037] Figure 6 A schematic diagram showing the power transmission route of the hybrid power transmission device of the present invention in parallel mode in the second gear position is illustrated.

[0038] Figure 7 A schematic diagram of the power transmission route of the hybrid power transmission device of the present invention in the shutdown power generation mode is shown;

[0039] Figure 8 A gear diagram of the hybrid power transmission device of the present invention is shown.

[0040] Icons: 1-Engine; 2-Motor; 3-First clutch; 4-Second clutch; 5-Output end; 6-One-way clutch; 71-Sun gear; 72-Planet carrier; 73-First planetary gear; 74-Second planetary gear; 75-First external gear ring; 76-Second external gear ring. Detailed Implementation

[0041] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0042] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0043] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0044] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0045] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0046] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0047] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0048] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0049] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0050] The following will combine Figures 1 to 8 The hybrid power transmission device and its power transmission route of this application are described below. Figures 2 to 7 In the diagram, solid lines indicate the power transmission route, while dashed lines indicate routes where power transmission does not occur.

[0051] like Figure 1 As shown, the hybrid power transmission device includes a motor 2, an engine 1, a planetary gear set, a first clutch 3, a second clutch 4, and an output end 5. The first clutch 3 and the second clutch 4 are both connected to the output end 5. The planetary gear set includes a planet carrier 72 and a first external gear ring 75. The motor 2, the first clutch 3, and the first external gear ring 75 are all connected to the planet carrier 72. The first external gear ring 75 is connected to the second clutch 4. The engine 1 is connected to both the planet carrier 72 and the first clutch 3.

[0052] When the hybrid power transmission device of this application is used, multiple gears and modes can be switched through the cooperation of the motor 2, engine 1, planetary gear set, first clutch 3 and second clutch 4.

[0053] When the hybrid power transmission device is in the first gear, such as Figure 2 As shown, when the first clutch 3 is engaged, the motor 2 is working and the engine 1 is not working. The motor 2 drives the planetary carrier 72 to rotate, so that the power is transmitted to the output end 5 through the first clutch 3, thereby driving the wheels to rotate.

[0054] When the hybrid power transmission device is in the second gear, such as Figure 3 As shown, when the second clutch 4 is engaged, the motor 2 is working and the engine 1 is not working. The motor 2 drives the planetary carrier 72 to rotate, thereby driving the first external gear ring 75 to rotate, so that the power is transmitted to the output end 5 through the second clutch 4, thereby driving the wheel to rotate.

[0055] Before the hybrid power transmission device switches to parallel mode, it is in the first or second gear position mentioned above. When switching to parallel mode, if... Figure 5 and Figure 6 As shown, when engine 1 is working, the power from engine 1 is transmitted to planetary carrier 72 to provide auxiliary power for the drive of motor 2 and participate in the drive.

[0056] When the hybrid power transmission device is in engine direct drive mode, such as Figure 4 As shown, when the first clutch 3 is engaged, the motor 2 and engine 1 work; when not working, the power output by engine 1 is transmitted to the output end 5 via the first clutch 3, thereby driving the wheels.

[0057] When the hybrid power transmission device is in power generation mode, such as Figure 7 As shown, both the first clutch 3 and the second clutch 4 are disengaged, and the power output from the engine 1 is transmitted to the planetary carrier 72, which in turn transmits the power to the motor 2, thereby driving the motor 2 to generate electricity.

[0058] When the hybrid power transmission device is in the first gear, second gear, or parallel mode, if the driver presses the brake pedal, the vehicle detects the driver's braking intention and activates the energy recovery mode. At this time, motor 2 changes from driving mode to power generation mode, and energy is converted from kinetic energy into electrical energy, which flows to the power battery for energy recovery.

[0059] The hybrid power transmission device of this application realizes six power transmission modes through motor 2, engine 1, planetary gear set, first clutch 3 and second clutch 4, which reduces the performance requirements of motor 2 and reduces the cost of hybrid power transmission device.

[0060] Optionally, output 5 is connected to the wheel, thereby driving the wheel to rotate. The planetary gear set can be a variant Ravina planetary gear set.

[0061] In the embodiments of this application, such as Figure 1 and Figure 2 As shown, the planetary array also includes a housing ( Figures 1 to 7 (Not shown in the diagram) consists of a sun gear 71, a first planetary gear 73, a planet carrier 72, and a first external gear ring 75. The sun gear 71 is connected to the motor 2, enabling the motor 2 to drive the sun gear 71 to rotate. The first planetary gear 73 meshes with both the planet carrier 72 and the sun gear 71, allowing the first planetary gear 73 to rotate under the drive of the sun gear 71. Simultaneously, the first planetary gear 73 drives the planet carrier 72 to rotate, thereby transmitting the power output from the motor 2 to the planet carrier 72 via the sun gear 71 and the first planetary gear 73. The planet carrier 72 is connected to a first clutch 3. When the first clutch 3 is engaged, power can be transmitted to the output end 5 via the first clutch 3, thus realizing the power transmission of the first gear.

[0062] Furthermore, such as Figure 1 and Figure 3 As shown, the planetary gear set also includes a second planetary gear 74, which is disposed inside the housing. The second planetary gear 74 meshes with both the planet carrier 72 and the first external gear ring 75. The planet carrier 72 can rotate under the drive of the sun gear 71, thereby driving the second planetary gear 74 to rotate, which in turn drives the first external gear ring 75 to rotate. The first external gear ring 75 is connected to a second clutch 4. When the second clutch 4 is engaged, power can be transmitted to the output end 5 via the second clutch 4, thus realizing the power transmission of the second gear.

[0063] In addition, the planetary gear set also includes a second external gear ring 76, which is fixed to the inner wall of the housing and meshes with the first planetary gear 73. The first planetary gear 73 meshes with both the second external gear ring 76 and the sun gear 71, enabling the sun gear 71 to drive the first planetary gear 73 to rotate, thereby realizing the transmission of power.

[0064] Optionally, the second external gear ring 76 can be fixed to the housing by spline connection, interference fit or welding.

[0065] In the embodiments of this application, such as Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the hybrid power transmission device also includes a one-way clutch 6. The engine 1 is connected to the planetary carrier 72 and the first clutch 3 via the one-way clutch 6. By setting the one-way clutch 6, the power of the electric motor 2 can be prevented from being transmitted to the engine 1, thus extending the life of the engine 1. The connection of the engine 1 to the planetary carrier 72 and the first clutch 3 via the one-way clutch 6 allows the power output of the engine 1 to be directly transmitted to the output end 5 via the first clutch 3, and the power output of the engine 1 can also be transmitted to the planetary carrier 72, thereby providing assistance for the drive of the electric motor 2, thus enabling the hybrid power transmission device to operate in either direct-drive mode or parallel mode.

[0066] Furthermore, when the hybrid power transmission device is in first gear, second gear, or parallel mode, if the driver presses the brake pedal, the vehicle detects the driver's braking intention and activates the energy recovery mode. At this time, motor 2 changes from driving mode to power generation mode, converting kinetic energy into electrical energy, which flows to the power battery for energy recovery. When the vehicle is parked, both the first clutch 3 and the second clutch 4 are disengaged. The power from engine 1 is transmitted to the planetary carrier 72 through the one-way clutch 6, which in turn drives the first planetary gear 73 to rotate, ultimately driving the first sun gear 71 to rotate, thus transmitting power to motor 2 for power generation, thereby putting the hybrid power transmission device in parking power generation mode.

[0067] The hybrid power transmission device of this application can switch between multiple modes, reducing the performance requirements of the motor 2 and lowering the cost of the hybrid power transmission device.

[0068] According to a second aspect of this application, a method for operating a hybrid power transmission device is provided, such as... Figure 8 As shown, the operation of the hybrid power transmission device includes engaging one of the first clutch 3 and the second clutch 4 to position the hybrid power transmission device in either the first or second gear. Thus, gear shifting can be achieved by controlling the switching between the first clutch 3 and the second clutch 4.

[0069] When the first clutch 3 is engaged, the power output by the first planetary gear 73 can be transmitted to the output end 5 via the first clutch 3, thereby realizing the power transmission of the first gear. When the second clutch 4 is engaged, the power output by the first external gear ring 75 can be transmitted to the output end 5 via the second clutch 4, thereby realizing the power transmission of the second gear.

[0070] Furthermore, such as Figure 2As shown, when the hybrid power transmission device is in the first gear, the motor 2 is working, the engine 1 is not working, the first clutch 3 is engaged, and the second clutch 4 is disengaged; the power output by the motor 2 drives the sun gear 71 to rotate. Since the second external gear ring 76 is fixedly connected to the housing for braking, the first sun gear 71 can drive the first planetary gear 73 to rotate, thereby driving the planet carrier 72 to rotate. The planet carrier 72 is connected to the first clutch 3, so that the power is transmitted to the output end 5 through the first clutch 3, thereby driving the wheel to rotate.

[0071] When the hybrid power transmission device is in the second gear, motor 2 operates, engine 1 does not operate, the second clutch 4 engages, and the first clutch 3 disengages. The power output from motor 2 drives the first sun gear 71 to rotate. The second external gear ring 76 is fixedly connected to the housing and braked, allowing the first sun gear 71 to drive the first planetary gear 73 to rotate, thereby driving the planet carrier 72 to rotate. Under the combined action of the planet carrier 72 and the first planetary gear 73, the second planetary gear 74 rotates, thereby driving the first external gear ring 75 to rotate. The first external gear ring 75 is connected to the second clutch 4, allowing power to be transmitted to the output end 5 through the second clutch 4, thereby driving the wheels to rotate.

[0072] Furthermore, when the hybrid power transmission device is in the first or second gear, engine 1 starts, and the hybrid power transmission device switches to parallel mode, allowing the power of engine 1 to be transmitted to the planetary carrier 72. At this time, both engine 1 and electric motor 2 can provide power. Thus, the vehicle can engage engine 1 for auxiliary drive according to the required power demand. When engine 1 is operating and in the first gear, such as... Figure 4 As shown, the power output by engine 1 can be transmitted to the first clutch 3 for auxiliary drive; when engine 1 is running and in second gear, as... Figure 5 As shown, the power output by engine 1 can be transmitted to planetary carrier 72 for auxiliary drive.

[0073] Furthermore, the operation of the hybrid power transmission device also includes: when engine 1 is running, motor 2 is not running, and the first clutch 3 is engaged, the hybrid power transmission device switches to engine direct drive mode, such as... Figure 4 As shown, the power output by engine 1 is transmitted to output end 5 via first clutch 3, thereby driving the wheels to rotate.

[0074] In the embodiments of this application, the operation method of the hybrid power transmission device further includes: when the hybrid power transmission device is in the first gear, the second gear, or the parallel mode, the driver depresses the vehicle's brake pedal, causing the hybrid power transmission device to switch to the energy recovery mode, the motor 2 changes from the driving mode to the power generation mode, and the kinetic energy is converted into electrical energy through the motor 2 and flows to the power battery, thereby realizing energy recovery during the braking process and avoiding energy waste.

[0075] It should be noted that when in energy recovery mode, the components of the hybrid power transmission device maintain the state of the previous mode or gear. That is, after the hybrid power transmission device switches from the first gear to energy recovery mode, the state of each component in the hybrid power transmission device remains the same as that of the components in the first gear; after the hybrid power transmission device switches from the second gear to energy recovery mode, the state of each component in the hybrid power transmission device remains the same as that of the components in the second gear; and after the hybrid power transmission device switches from parallel mode to energy recovery mode, the state of each component in the hybrid power transmission device remains the same as that of the components in parallel mode.

[0076] Furthermore, the operation of the hybrid power transmission device also includes: when the vehicle is parked or stationary, both the first clutch 3 and the second clutch 4 are disengaged, causing the hybrid power transmission device to enter a parking power generation mode, such as... Figure 7 As shown, the power output by the engine 1 is transmitted to the planetary carrier 72, causing the first planetary gear 73 and the sun gear 71 to rotate, thereby transmitting the power to the motor 2. The kinetic energy is converted into electrical energy by the motor 2 and flows to the power battery, thus realizing power generation in the parking state.

[0077] Through the above-described operation method of the hybrid power transmission device, the hybrid power transmission device can realize power transmission in first gear, second gear, parallel mode in first gear and second gear, engine direct drive mode, energy recovery mode and parking power generation mode, so as to meet the power output requirements under different operating conditions.

[0078] According to a third aspect of this application, a vehicle is provided, the vehicle including the aforementioned hybrid power transmission device, the vehicle being capable of power transmission in a first gear, a second gear, a parallel mode in the first and second gears, an engine direct drive mode, an energy recovery mode, and a parking power generation mode, thereby meeting the power output requirements under different operating conditions.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hybrid power transmission device, wherein the hybrid power transmission device is used in a vehicle, characterized in that, The hybrid power transmission device includes a motor, an engine, a planetary gear set, a first clutch, a second clutch, and an output end. The first ends of the first clutch and the second clutch are both connected to the output end. The planetary gear set includes a housing, a sun gear, a first planetary gear, a second planetary gear, a planet carrier, a first external gear ring, and a second external gear ring. The motor is connected to the sun gear. The first planetary gear is disposed inside the housing and meshes with both the sun gear and the planet carrier. The second external gear ring is fixed to the inner wall of the housing and meshes with both the first and second planetary gears. The second planetary gear also meshes with both the planet carrier and the first planetary gear. The first external gear ring is connected to the second end of the second clutch. The planet carrier is connected to the second end of the first clutch. The engine is connected to the second end of the first clutch and the planet carrier.

2. The hybrid power transmission device according to claim 1, characterized in that, The hybrid power transmission device also includes a one-way clutch, through which the engine is connected to the second end of the first clutch and the planetary carrier.

3. A method for operating a hybrid power transmission device, characterized in that, The operation method of the hybrid power transmission device applies to the hybrid power transmission device according to claim 1 or 2, and the operation method of the hybrid power transmission device includes: engaging one of the first clutch and the second clutch to put the hybrid power transmission device in a first gear or a second gear.

4. The method of operating the hybrid power transmission device according to claim 3, characterized in that, When the hybrid power transmission device is in the first gear, the electric motor is working, the engine is not working, the first clutch is engaged, and the second clutch is disengaged; When the hybrid power transmission device is in the second gear, the electric motor is working, the engine is not working, the second clutch is engaged, and the first clutch is disengaged.

5. The method of operating the hybrid power transmission device according to claim 4, characterized in that, When the hybrid power transmission device is in the first gear, the motor drives the sun gear to rotate, thereby rotating the planetary carrier, so that power is transmitted to the output end via the first clutch.

6. The method of operating the hybrid power transmission device according to claim 4, characterized in that, When the hybrid power transmission device is in the second gear, the motor drives the sun gear to rotate, causing the planet carrier to rotate. Under the action of the planet carrier and the first planetary gear, the second planetary gear rotates, thereby driving the first external gear ring to rotate, so that the power is transmitted to the output end through the second clutch.

7. The method of operating the hybrid power transmission device according to any one of claims 4-6, characterized in that, When the hybrid power transmission device is in the first gear or the second gear, the engine starts, and the hybrid power transmission device switches to parallel mode, so that the power of the engine is transmitted to the planetary carrier.

8. The method of operating the hybrid power transmission device according to claim 7, characterized in that, The operation method of the hybrid power transmission device further includes: When the engine is running and the electric motor is not running, and the first clutch is engaged, the hybrid power transmission device switches to engine direct drive mode, and the power output by the engine is transmitted to the output end via the first clutch.

9. The method of operating the hybrid power transmission device according to claim 7, characterized in that, The operation method of the hybrid power transmission device further includes: When the hybrid power transmission device is in the first gear, the second gear, or the parallel mode, the driver depresses the vehicle's brake pedal, causing the hybrid power transmission device to switch to energy recovery mode. The motor changes from drive mode to power generation mode, and kinetic energy is converted into electrical energy and flows to the power battery via the motor.

10. The method of operating the hybrid power transmission device according to claim 7, characterized in that, The operation method of the hybrid power transmission device further includes: When the vehicle is parked or stationary, both the first clutch and the second clutch are disengaged, putting the hybrid power transmission device into a parking power generation mode. The power output from the engine is transmitted to the planetary carrier, causing the first planetary gear and the sun gear to rotate, thereby transmitting power to the electric motor. The kinetic energy is converted into electrical energy by the electric motor and flows to the power battery.

11. A vehicle, characterized in that, The vehicle includes the hybrid power transmission device as described in claim 1 or 2.

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