A hybrid power system and a car

Abstract

This application relates to the field of power transmission technology, and particularly to a hybrid power system and a vehicle. The hybrid power system includes a planetary gear mechanism, an engine, a first motor, a second motor, a braking unit, a clutch unit, and an output mechanism. The planetary gear mechanism includes a first sun gear, a second sun gear, a planetary gear set, and a planet carrier. The planetary gear set is mounted on the planet carrier and can rotate relative to it. The first sun gear and the second sun gear mesh with the planetary gear set. The engine and the first motor are driven by the first sun gear. The second motor is driven by the second sun gear. The braking unit is connected to the planet carrier. The clutch unit connects the second sun gear and the planet carrier. The output mechanism is driven by both the second sun gear and the second motor. The hybrid power system of this application can improve shift smoothness.

Description

Technical Field

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

[0002] A car is a means of transportation that can switch gears to suit different road conditions.

[0003] A car generally consists of a power source and a transmission mechanism. The power source generates power, and the transmission mechanism changes the transmission path of the power source, thereby changing the gear position.

[0004] In related technologies, the transmission between the power source and the transmission mechanism is temporarily disconnected during gear shifting, which leads to a decrease in shift smoothness. Summary of the Invention

[0005] In view of this, this application provides a hybrid power system and a vehicle to improve shift smoothness.

[0006] Specifically, the following technical solutions are included:

[0007] The first aspect of this application provides a hybrid power system, which includes a planetary gear mechanism, an engine, a first motor, a second motor, a braking unit, a clutch unit, and an output mechanism.

[0008] The planetary gear mechanism includes a first sun gear, a second sun gear, a planetary gear set, and a planet carrier. The planetary gear set is fitted onto the planet carrier and is rotatable relative to the planet carrier. The first sun gear and the second sun gear are respectively meshed with the planetary gear set.

[0009] The engine and the first motor are respectively connected to the first sun gear drive.

[0010] The second motor is connected to the second sun gear drive.

[0011] The braking unit is connected to the planetary carrier.

[0012] The clutch unit connects the second sun gear and the planet carrier.

[0013] The output mechanism is connected to both the second sun gear and the second motor.

[0014] Optionally, the hybrid power system includes an input shaft, a first sun gear is mounted on the input shaft and is drivenly connected to the input shaft, one end of the input shaft is drivenly connected to the engine, and the other end of the input shaft is drivenly connected to the first motor.

[0015] Optionally, the planetary gear mechanism includes a transmission cylinder that drivesly connects the second sun gear and the second motor, with the input shaft passing through the transmission cylinder.

[0016] Optionally, the clutch unit includes an inner hub and an outer hub, the inner hub being connected to the transmission cylinder, the outer hub being connected to the planetary carrier, and the outer hub being capable of engaging and disengaging from the inner hub.

[0017] Optionally, the hybrid power system includes a reduction gear mechanism that is drively connected to the transmission cylinder and the second motor.

[0018] Optionally, the reduction mechanism includes a drive shaft and a first reduction gear. The first reduction gear is sleeved on one end of the drive shaft and is drivenly connected to the drive shaft. The end of the drive cylinder opposite to the second sun gear has a second reduction gear, which meshes with the first reduction gear. The other end of the drive shaft is drivenly connected to the output mechanism, and the second motor is drivenly connected to the first reduction gear.

[0019] Optionally, the planetary gear set includes a first planetary gear, a second planetary gear, and a connecting cylinder. The first planetary gear and the second planetary gear are located at opposite ends of the connecting cylinder and are connected to the connecting cylinder in a driving manner. The first planetary gear meshes with the first sun gear, and the second planetary gear meshes with the second sun gear.

[0020] Optionally, the planetary carrier passes through the connecting cylinder, and the connecting cylinder and the planetary carrier are connected by a bearing.

[0021] Optionally, the braking unit includes a first connecting part and a second connecting part, the first connecting part being connected to the planetary carrier, and the second connecting part being able to connect to and separate from the first connecting part.

[0022] A second aspect of this application provides an automobile that includes a hybrid power system as described above.

[0023] The beneficial effects of the technical solution provided in this application embodiment include at least the following: both the engine and the first motor are connected to the first sun gear transmission, and power can be output to the output mechanism through the planetary gear mechanism, while the second motor can directly output power to the output mechanism. The planetary gear mechanism, in cooperation with the clutch unit and braking unit, can change the power transmission path of the engine, thus cooperating with the second motor to maintain power output to the output mechanism during driving, thereby reducing the decrease in smoothness caused by gear shifting. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of a hybrid power system provided in an embodiment of this application;

[0026] Figure 2 A power transmission diagram of a first hybrid power system provided in this application embodiment;

[0027] Figure 3 A power transmission diagram of a second hybrid power system provided in an embodiment of this application;

[0028] Figure 4 A power transmission diagram of a third hybrid power system provided in this application embodiment;

[0029] Figure 5 A power transmission diagram of a fourth hybrid power system provided in this application embodiment;

[0030] Figure 6 The power transmission diagram of the fifth hybrid power system provided in the embodiments of this application.

[0031] The reference numerals in the figure are respectively:

[0032] 1. Planetary gear mechanism; 11. First sun gear; 12. Second sun gear; 13. Planetary gear set; 131. First planetary gear; 132. Second planetary gear; 133. Connecting cylinder; 14. Planet carrier; 15. Transmission cylinder; 151. Second reduction gear;

[0033] 2. Engine;

[0034] 3. First motor;

[0035] 4. Second motor;

[0036] 5. Braking unit; 51. First connecting part; 52. Second connecting part;

[0037] 6. Clutch unit; 61. Inner hub; 62. Outer hub;

[0038] 7. Output mechanism;

[0039] 8. Input axis;

[0040] 9. Reduction mechanism; 91. Drive shaft; 92. First reduction gear.

[0041] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on the given information, and these directional terms are used only to more clearly describe the relationships between structures, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged.

[0044] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0045] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0046] The first aspect of this application provides a hybrid power system, such as Figure 1 As shown, the hybrid power system includes a planetary gear mechanism 1, an engine 2, a first motor 3, a second motor 4, a braking unit 5, a clutch unit 6, and an output mechanism 7. Among these,

[0047] The planetary gear mechanism 1 includes a first sun gear 11, a second sun gear 12, a planetary gear set 13, and a planet carrier 14. The planetary gear set 13 is mounted on the planet carrier 14 and can rotate relative to the planet carrier 14. The first sun gear 11 and the second sun gear 12 are respectively meshed with the planetary gear set 13.

[0048] The engine 2 and the first motor 3 are respectively connected to the first sun gear 11 for transmission.

[0049] The second motor 4 is connected to the second sun gear 12 via a transmission.

[0050] Braking unit 5 is connected to planetary carrier 14.

[0051] The clutch unit 6 connects the second sun wheel 12 and the planet carrier 14.

[0052] The output mechanism 7 is connected to the second sun gear 12 and the second motor 4 for transmission.

[0053] Understandably, both engine 2 and the first motor 3 are connected to the first sun gear 11 and can output power to the output mechanism 7 through the planetary gear mechanism 1, while the second motor 4 can directly output power to the output mechanism 7. The planetary gear mechanism 1, in cooperation with the clutch unit 6 and the braking unit 5, can change the power transmission path of engine 2, thus cooperating with the second motor 4. This helps maintain power output to the output mechanism 7 during driving, reducing the decrease in smoothness caused by gear shifting.

[0054] In this embodiment, the engine 2 and the second motor 4 can be used as power sources to directly or indirectly output power to the output mechanism 7, and the first motor 3 can be used as a generator to receive power from the engine 2 and generate electricity through the planetary gear mechanism 1.

[0055] In this embodiment, the planetary gear mechanism 1 is connected to the engine 2 via a transmission. The opening and closing of the clutch unit 6 and the braking unit 5 can be used to select whether the engine 2 outputs power to the output mechanism 7. At the same time, the second motor 4 can directly output power to the output mechanism 7. Thus, when the power of the engine 2 is cut off, the output mechanism 7 can still obtain power to improve the smoothness of gear shifting.

[0056] The first sun gear 11 and the second sun gear 12 are respectively meshed with the planetary gear set 13, and can rotate around their own axes and around the axis of the first sun gear 11 by the driving action of the first sun gear 11 and the second sun gear 12. The planetary gear set 13 is mounted on the planet carrier 14, and can also drive the planet carrier 14 to rotate, thus realizing the transmission of power.

[0057] In this embodiment of the application, the engine 2 can directly drive the first sun gear 11 and the second sun gear 12 to rotate, thereby transmitting power. Alternatively, it can drive the first sun gear 11 and the second sun gear 12 to rotate through an intermediate component, thereby transmitting power.

[0058] In this embodiment, the first motor 3 can be electrically connected to the second motor 4. When the engine 2 is working or the output mechanism 7 is working, the first motor 3 can generate electrical energy and transmit the electrical energy to the second motor 4.

[0059] In this embodiment of the application, the first motor 3 can be a generator.

[0060] In this embodiment, the second motor 4 can be a drive motor.

[0061] In this embodiment of the application, the hybrid power system may include a power source, which may store the electrical energy generated when the first motor 3 generates electricity for other uses.

[0062] In this embodiment, the braking unit 5 is connected to the planetary carrier 14, enabling the locking and unlocking of the planetary carrier 14. The locked and unlocked states of the planetary carrier 14 facilitate changing the power transmission path of the planetary gear mechanism 1, thereby adjusting the power obtained by the output mechanism 7.

[0063] In this embodiment, the clutch unit 6 connects the planet carrier 14 and the second sun gear 12, which can change the connection state between the planet carrier 14 and the second sun gear 12. This is beneficial to change the power transmission route of the planetary gear mechanism 1, thereby adjusting the power obtained by the output mechanism 7.

[0064] In this embodiment, the engine 2 and the first motor 3 can be connected to different positions of the first sun gear 11 for transmission, or they can be connected to the same position of the first sun gear 11 for transmission. This is beneficial for the engine 2 to transmit power to the first motor 3.

[0065] In this embodiment, the output mechanism 7 is connected to both the second sun gear 12 and the second motor 4, and can obtain power from the engine 2 from the second sun gear 12 or directly from the second motor 4.

[0066] In this embodiment, the hybrid power system has five operating modes, specifically including:

[0067] 1. Pure electric mode (e.g.) Figure 2 As shown in the diagram, the arrows indicate the power transmission path.

[0068] In this mode, engine 2 is not working, first motor 3 is not working, second motor 4 is working, clutch unit 6 is disengaged, and braking unit 5 unlocks planetary carrier 14.

[0069] The power transmission path is as follows: the second motor 4 generates power, which is then transmitted to the output mechanism 7.

[0070] 2. Series mode (e.g.) Figure 3 As shown in the diagram, the arrows indicate the power transmission path.

[0071] In this mode, engine 2, first motor 3 and second motor 4 are working, clutch unit 6 is disengaged, and braking unit 5 unlocks planetary carrier 14.

[0072] There are two power transmission paths, specifically:

[0073] a. The second motor 4 generates power, which is then transmitted to the output mechanism 7.

[0074] b. Engine 2 generates power, which is transmitted to the first motor 3 to generate electricity.

[0075] 3. Parallel mode, first gear (e.g.) Figure 4 As shown in the diagram, the arrows indicate the power transmission path.

[0076] In this mode, engine 2, first motor 3 and second motor 4 are working, clutch unit 6 is disengaged, and braking unit 5 locks planetary carrier 14.

[0077] There are three power transmission paths, specifically:

[0078] a. The second motor 4 generates power, which is then transmitted to the output mechanism 7.

[0079] b. Engine 2 generates power, which is transmitted to the first motor 3 to generate electricity.

[0080] c. Engine 2 generates power, which is transmitted from the first sun gear 11 through the planetary gear set 13 to the second sun gear 12, and the second sun gear 12 transmits the power to the output mechanism 7.

[0081] The rotational speed output by the planetary gear mechanism 1 is mainly affected by the number of teeth on the second sun gear 12 and the planetary gear set 13. When the engine 2 outputs power at the same speed, the rotational speed can be changed by altering the number of teeth on both components.

[0082] 4. Parallel mode, second gear (e.g.) Figure 5 As shown in the diagram, the arrows indicate the power transmission path.

[0083] In this mode, engine 2, first motor 3 and second motor 4 are working, clutch unit 6 is engaged, and braking unit 5 is unlocked planetary carrier 14.

[0084] There are three power transmission paths, specifically:

[0085] a. The second motor 4 generates power, which is then transmitted to the output mechanism 7.

[0086] b. Engine 2 generates power, which is transmitted to the first motor 3 to generate electricity.

[0087] c. Engine 2 generates power, which is transmitted from planetary gear mechanism 1 to output mechanism 7.

[0088] The planetary gear mechanism 1 can be considered as rotating synchronously as a whole. This working state allows the power of the engine 2 to be directly output, thus completing the power transmission. The vehicle is directly driven by the engine 2, while the first motor 3 and the second motor 4 are responsible for adjusting the engine 2 to a high-efficiency operating point and assisting in driving the vehicle.

[0089] 5. Energy recovery mode (e.g.) Figure 6 As shown in the diagram, the arrows indicate the power transmission path.

[0090] In this mode, engine 2, first motor 3 and second motor 4 are working, clutch unit 6 is disengaged, and braking unit 5 unlocks planetary carrier 14.

[0091] The power transmission path is as follows: the output mechanism 7 drives the second motor 4 to generate electricity.

[0092] In this embodiment, the output mechanism 7 may include a differential, which is driven by the planetary gear mechanism 1 and the second motor 4 to rotate, thereby realizing the transmission of power.

[0093] In some embodiments of this application, such as Figure 1 As shown, the hybrid power system includes an input shaft 8, a first sun gear 11 mounted on the input shaft 8 and connected to the input shaft 8 in a driving manner, one end of the input shaft 8 being connected to the engine 2 in a driving manner, and the other end of the input shaft 8 being connected to the first motor 3 in a driving manner.

[0094] Understandably, engine 2 can drive input shaft 8 to rotate, and input shaft 8 in turn drives first sun gear 11 to rotate, thus achieving power transmission. Engine 2 and first motor 3 are respectively connected to both ends of input shaft 8, which can reduce interference between them, thus facilitating the layout of the hybrid power system.

[0095] In this embodiment, the first sun gear 11 and the input shaft 8 can be connected by means of key connection, welding or other methods to achieve transmission.

[0096] In this embodiment, the end of the input shaft 8 that is connected to the first motor 3 has a gear, and the gear on the input shaft 8 meshes with the gear on the first motor 3 to achieve a transmission connection. The number of teeth on the gear on the input shaft 8 is greater than the number of teeth on the gear on the first motor 3.

[0097] In some embodiments of this application, such as Figure 1 As shown, the planetary gear mechanism 1 includes a transmission cylinder 15, which is connected to the second sun gear 12 and the second motor 4. The input shaft 8 passes through the transmission cylinder 15.

[0098] Understandably, the transmission cylinder 15 enables the transmission of power between the second sun gear 12 and the second motor 4. Simultaneously, the transmission cylinder 15 helps to avoid the input shaft 8, which, passing through the transmission cylinder 15, can then drive the first motor 3.

[0099] In some embodiments of this application, such as Figure 1As shown, the clutch unit 6 includes an inner hub 61 and an outer hub 62. The inner hub 61 is connected to the transmission cylinder 15, and the outer hub 62 is connected to the planetary carrier 14. The outer hub 62 can engage and disengage with the inner hub 61.

[0100] It is understandable that when the inner hub 61 and the outer hub 62 are connected, the planet carrier 14 and the second sun gear 12 can rotate synchronously, and when the inner hub 61 and the outer hub 62 are separated, the planet carrier 14 and the second sun gear 12 can rotate relative to each other.

[0101] In this embodiment, the outer hub 62 can be driven to move, thereby engaging and disengaging with the inner hub 61. The outer hub 62 can be driven using pneumatic or hydraulic pressure.

[0102] In some embodiments of this application, such as Figure 1 As shown, the hybrid power system includes a reduction gear 9, which is connected to a transmission cylinder 15 and a second motor 4.

[0103] Understandably, the power generated by engine 2 and second motor 4 generally has the characteristics of high speed and low torque. This power is not conducive to vehicle movement when driving output mechanism 7. The reduction mechanism 9 can reduce the speed and increase the torque of the received power, which is beneficial for output mechanism 7 to drive the vehicle. In addition, the reduction mechanism 9 can also extend the power transmission path and avoid interference between planetary gear mechanism 1 and second motor 4.

[0104] In some embodiments of this application, such as Figure 1 As shown, the reduction mechanism 9 includes a drive shaft 91 and a first reduction gear 92. The first reduction gear 92 is sleeved on one end of the drive shaft 91 and is connected to the drive shaft 91 in a driving manner. The end of the drive cylinder 15 opposite to the second sun gear 12 has a second reduction gear 151, which meshes with the first reduction gear 92. The other end of the drive shaft 91 is connected to the output mechanism 7 in a driving manner. The second motor 4 is connected to the first reduction gear 92 in a driving manner.

[0105] Understandably, the drive shaft 91 can change the power transmission route. The first reduction gear 92 at one end can be driven to rotate by the second reduction gear 151 or by the second motor 4, and in turn, drive the output mechanism 7 at the other end, thus enabling the output mechanism 7 to operate. Under the action of the drive shaft 91, the direction of power transmission changes along the axial direction of the drive shaft 91. This facilitates arranging the output mechanism 7 and the second motor 4 on the same side of the output mechanism 7, thereby improving the compactness of the hybrid power system of this application.

[0106] In this embodiment, the second motor 4 can be connected to the first reduction gear 92 by meshing with a gear to achieve transmission.

[0107] In some embodiments of this application, such as Figure 1 As shown, the planetary gear set 13 includes a first planetary gear 131, a second planetary gear 132, and a connecting cylinder 133. The first planetary gear 131 and the second planetary gear 132 are located at the two ends of the connecting cylinder 133 and are connected to the connecting cylinder 133 in a driving manner. The first planetary gear 131 meshes with the first sun gear 11, and the second planetary gear 132 meshes with the second sun gear 12.

[0108] Understandably, the first planetary gear 131 can be driven to rotate by the first sun gear 11. The second planetary gear 132 can be driven to rotate by the second sun gear 12. The rotating first planetary gear 131 and second planetary gear 132 can drive the planet carrier 14 to rotate, thus realizing the transmission of power. The connecting cylinder 133 connects the first planetary gear 131 and the second planetary gear 132, which is beneficial for the planetary gear set 13 to transmit the power of the first sun gear 11 and the second sun gear 12, thereby realizing the transmission of power.

[0109] In this embodiment, the number of teeth of the first sun gear 11 is less than the number of teeth of the first planet gear 131, the number of teeth of the second sun gear 12 is greater than the number of teeth of the second planet gear 132, and the number of teeth of the first sun gear 11 is less than the number of teeth of the second sun gear 12.

[0110] In this embodiment, the first sun gear 11 is located within the cavity enclosed by the planet carrier 14 and meshes with the first planet gear 131.

[0111] In this embodiment, the second sun gear 12 is located within the cavity enclosed by the planet carrier 14 and meshes with the second planet gear 132.

[0112] In this embodiment, the first planetary gear 131 and the connecting cylinder 133 can be connected by welding, keying or other means to achieve transmission.

[0113] In this embodiment, the second planetary gear 132 and the connecting cylinder 133 can be connected by welding, keying or other means to achieve transmission.

[0114] In some embodiments of this application, such as Figure 1 As shown, the planetary carrier 14 passes through the connecting cylinder 133, and the connecting cylinder 133 and the planetary carrier 14 are connected by a bearing.

[0115] Understandably, the bearing facilitates the rotation of the connecting cylinder 133 relative to the planetary carrier 14 under the drive of the first planetary gear 131 and the second planetary gear 132. This facilitates the transmission of power from the engine 2 when the planetary carrier 14 is unlocked by the braking unit 5 and the clutch unit 6.

[0116] In some embodiments of this application, such as Figure 1As shown, the braking unit 5 includes a first connecting part 51 and a second connecting part 52. The first connecting part 51 is connected to the planetary carrier 14, and the second connecting part 52 can be connected to and separated from the first connecting part 51.

[0117] Understandably, the second connecting portion 52 can be fixed to other locations in the hybrid power system, such as the housing used to enclose the planetary gear mechanism 1. When the first connecting portion 51 is engaged with the second connecting portion 52, static friction can be generated when the planet carrier 14 rotates, thereby limiting the rotation of the planet carrier 14. Specifically, when the first connecting portion 51 is separated from the second connecting portion 52, the braking unit 5 unlocks the planet carrier 14; when the first connecting portion 51 is engaged with the second connecting portion 52, the braking unit 5 locks the planet carrier 14.

[0118] In the embodiments of this application, one of the first connecting part 51 and the second connecting part 52 can be driven by pneumatic pressure, hydraulic pressure, magnetic force, etc., to achieve connection and separation.

[0119] A second aspect of this application provides an automobile that includes a hybrid power system as described in the above embodiments.

[0120] It is understood that, due to the use of the hybrid power system of the above embodiments, the vehicle of this application has the same technical effects as the above embodiments, and will not be described again here.

[0121] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0122] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0123] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A hybrid power system, characterized in that, The hybrid power system includes a planetary gear mechanism (1), an engine (2), a first motor (3), a second motor (4), a braking unit (5), a clutch unit (6), and an output mechanism (7), wherein, The planetary gear mechanism (1) includes a first sun gear (11), a second sun gear (12), a planetary gear set (13), and a planet carrier (14). The planetary gear set (13) is sleeved on the planet carrier (14) and can rotate relative to the planet carrier (14). The first sun gear (11) and the second sun gear (12) respectively mesh with the planetary gear set (13). The engine (2) and the first motor (3) are respectively connected to the first sun gear (11) for transmission; The second motor (4) is connected to the second sun gear (12) via a transmission. The braking unit (5) is connected to the planetary carrier (14); The clutch unit (6) connects the second sun gear (12) and the planet carrier (14); The output mechanism (7) is connected to both the second sun gear (12) and the second motor (4) in a transmission manner; The hybrid power system includes an input shaft (8), a first sun gear (11) is sleeved on the input shaft (8) and is connected to the input shaft (8) in a driving manner, one end of the input shaft (8) is connected to the engine (2) in a driving manner, and the other end of the input shaft (8) is connected to the first motor (3) in a driving manner; The planetary gear mechanism (1) includes a transmission cylinder (15), which is connected to the second sun gear (12) and the second motor (4), and the input shaft (8) passes through the transmission cylinder (15). The clutch unit (6) includes an inner hub (61) and an outer hub (62). The inner hub (61) is connected to the transmission cylinder (15), and the outer hub (62) is connected to the planetary carrier (14). The outer hub (62) can engage and disengage with the inner hub (61). The planetary gear set (13) includes a first planetary gear (131), a second planetary gear (132), and a connecting cylinder (133). The first planetary gear (131) and the second planetary gear (132) are located at the two ends of the connecting cylinder (133) and are connected to the connecting cylinder (133) in a driving manner. The first planetary gear (131) meshes with the first sun gear (11), and the second planetary gear (132) meshes with the second sun gear (12). The braking unit (5) includes a first connecting part (51) and a second connecting part (52). The first connecting part (51) is connected to the planetary carrier (14), and the second connecting part (52) can be connected to and separated from the first connecting part (51).

2. The hybrid power system according to claim 1, characterized in that, The hybrid power system includes a reduction mechanism (9) that is drive-connected to the transmission cylinder (15) and the second motor (4).

3. The hybrid power system according to claim 2, characterized in that, The reduction mechanism (9) includes a drive shaft (91) and a first reduction gear (92). The first reduction gear (92) is sleeved on one end of the drive shaft (91) and is connected to the drive shaft (91) in a driving manner. The end of the drive cylinder (15) opposite to the second sun gear (12) has a second reduction gear (151). The second reduction gear (151) meshes with the first reduction gear (92). The other end of the drive shaft (91) is connected to the output mechanism (7) in a driving manner. The second motor (4) is connected to the first reduction gear (92) in a driving manner.

4. The hybrid power system according to claim 1, characterized in that, The planetary carrier (14) passes through the connecting cylinder (133), and the connecting cylinder (133) and the planetary carrier (14) are connected by a bearing.

5. A car, characterized in that, The vehicle includes a hybrid power system as described in any one of claims 1 to 4.

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