Electric vehicle drive system and electric vehicle

Abstract

An electric vehicle drive system and an electric vehicle, the electric vehicle drive system comprising: a first powertrain (1), a second powertrain (2), a first transmission system (3), a second transmission system (4), and a battery system (5); the first powertrain (1) is connected to the first transmission system (3); the second powertrain (2) is connected to the second transmission system (4); the first powertrain (1) includes a generator (11, 21, 31, 41, 51, 61, 71, 81) and an engine (12, 22, 32, 42, 52, 62, 72, 82), the engine (12, 22, 32, 42, 52, 62, 72, 82) driving the generator (11, 21, 31, 42, 52, 62, 72, 82). The generator (11, 21, 31, 41, 51, 61, 71, 81) generates electrical energy, or drives the first side wheel through the first transmission system (3), or outputs the generated electrical energy to the battery system (5); the second power assembly (2) drives the second side wheel through the second transmission system (4); the battery system (5) is connected to the generator (11, 21, 31, 41, 51, 61, 71, 81) and the second power assembly (2) to receive the electrical energy output by the generator (11, 21, 31, 41, 51, 61, 71, 81) and output the stored electrical energy to the second power assembly (2) and / or the generator (11, 21, 31, 41, 51, 61, 71, 81).

Description

Technical Field

[0001] This application relates to the field of automotive technology, specifically to an electric vehicle drive system and an electric vehicle. Background Technology

[0002] Currently, electric vehicles are mainly classified into two types: battery-powered electric vehicles and electric vehicles that combine batteries and fuel. Range-extended hybrid electric vehicles, as a type of hybrid electric vehicle, are widely used because their fuel engine drives a generator to produce electricity and provide power to the battery. However, in the currently used range-extended hybrid solutions, the generator can only be used for generating electricity. Therefore, in order to achieve hybrid operation, the range-extended hybrid solution needs to be equipped with a separate generator on the original drive system. The added generator will occupy some of the vehicle space, reduce the space available to passengers, and increase the cost of the electric vehicle. Summary of the Invention

[0003] This application provides an electric vehicle drive system and an electric vehicle, which reduces the driving cost of the electric vehicle, increases the space of the electric vehicle, and enables a four-wheel drive mode to improve the performance of the electric vehicle.

[0004] In a first aspect, embodiments of this application provide an electric vehicle drive system, which includes: a first powertrain, a second powertrain, a first transmission system, a second transmission system, and a battery system.

[0005] The electric vehicle is equipped with a first powertrain connected to a first transmission system, which drives the first wheel on one side. A second powertrain is connected to a second transmission system, which drives the second wheel on the other side. The first powertrain includes a generator and an engine. The engine drives the generator to generate electrical energy, or drives the first wheel on the other side via the first transmission system. The generator drives the first wheel on the other side via the first transmission system, or outputs the generated electrical energy to a battery system. The second powertrain drives the connected second wheel on the other side via the second transmission system. The battery system is connected to the generator and the second powertrain, and receives electrical energy from the generator and outputs stored electrical energy to the second powertrain and / or the generator. It should be noted that one side (first wheel) and the other side (second wheel) are the front and rear sides, respectively. That is, the first transmission system drives the front wheel of the electric vehicle, and the second transmission system drives the rear wheel; or, the first transmission system drives the rear wheel, and the second transmission system drives the front wheel.

[0006] The electric vehicle drive system provided in this application includes two powertrains, each connected to a transmission system. When the electric vehicle battery system has sufficient remaining charge, it can simultaneously supply power to the generator in the first powertrain and the second powertrain. This allows the generator to act as an electric motor, driving the first wheel via the first transmission system. When the remaining charge in the electric vehicle battery system is insufficient to meet the vehicle's power requirements, the engine can directly drive the vehicle to provide power, or the engine can drive the generator to charge the battery system, ensuring the remaining charge in the battery system meets the vehicle's power needs. Therefore, in the electric vehicle drive system provided in this application, the generator in the first powertrain can act as a generator to provide power to the battery system, or as an electric motor to drive the wheel via the first transmission system. This reduces the number of components in the electric vehicle drive system, decreases its size, improves operating efficiency, and simplifies the structure.

[0007] In one possible implementation, the first powertrain also includes a connection component.

[0008] The engine and generator are connected by a connecting assembly; the engine and the first transmission system are connected by a connecting assembly; and the generator and the first transmission system are connected by a connecting assembly.

[0009] In one possible implementation, the connecting components include: a first transmission, a second transmission, a first clutch, and a second clutch.

[0010] The input shaft of the first transmission is connected to the engine via a first clutch, and the output shaft of the first transmission is connected to the generator; the input shaft of the second transmission is connected to the generator via a second clutch, and the output shaft of the second transmission is connected to the first transmission system.

[0011] Using the drive system of the electric vehicle described above, the separation or engagement of two devices can be achieved by controlling the clutch.

[0012] In one possible implementation, the connecting components include: a first transmission, a first clutch, and a second clutch.

[0013] The generator is connected to the engine via a first clutch; the input shaft of the first transmission is connected to the generator via a second clutch; and the output shaft of the first transmission is connected to the first transmission system.

[0014] Specifically, when the first clutch is engaged, the generator is connected to the electric motor, and the engine can drive the generator to generate electrical energy, which is then output to the battery system. When the second clutch is engaged, the generator is connected to the first transmission system, and the generator can drive the first wheel through the first transmission system. When the first clutch and the second clutch are engaged, the engine is connected to the first transmission system, and the engine can drive the first wheel through the first transmission system.

[0015] With the electric vehicle drive system described above, there is no speed increase or decrease between the generator and the engine, thereby reducing the number of power transmission devices between generators and improving power generation efficiency.

[0016] In one possible implementation, the connecting components include: a first transmission, a second transmission, and a first clutch.

[0017] The first transmission has its input shaft connected to the engine via a first clutch and its output shaft connected to a generator; the second transmission has its input shaft connected to the generator and its output shaft connected to the first transmission system; the second transmission includes a synchronizer.

[0018] Specifically, when the first clutch is engaged, the engine is connected to the generator, and the engine can drive the generator to generate electrical energy, which is then output to the battery system. When the synchronizer connects the generator to the first transmission system, the generator can drive the first wheel through the first transmission system. When the first clutch is engaged and the synchronizer connects the generator to the first transmission system, the engine can connect to the first transmission system and drive the first wheel through the first transmission system.

[0019] By adopting the above-mentioned electric vehicle drive system, the separation or engagement of the two devices can be achieved through the first clutch and the second transmission synchronizer, reducing one clutch, thereby reducing the number of devices in the electric vehicle drive system and improving the driving efficiency of the electric vehicle.

[0020] In one possible design, the connecting components include: a first transmission and a first clutch.

[0021] The generator is connected to the engine via a first clutch; the input shaft of the first transmission is connected to the generator, and the output shaft of the first transmission is connected to the first transmission system; the first transmission includes a synchronizer.

[0022] Specifically, when the first clutch is engaged, the engine is connected to the generator, and the engine can drive the generator to generate electrical energy, which is then output to the battery system. When the synchronizer connects the generator to the first transmission system, the generator can drive the first wheel on the first side through the first transmission system. When the first clutch is engaged and the synchronizer connects the generator to the first transmission system, the engine can connect to the first transmission system, and the engine can drive the first wheel on the first side through the first transmission system.

[0023] With the electric vehicle drive system described above, there is no speed increase or decrease between the generator and the engine, thereby reducing the number of power transmission devices between generators and improving the driving efficiency of the electric vehicle.

[0024] In one possible design, the connecting components include: a first transmission, a second transmission, and a dual clutch.

[0025] The input shaft of the first transmission is connected to the engine via a dual clutch, and the output shaft of the first transmission is connected to the generator; the input shaft of the second transmission is connected to both the first transmission and the engine via a dual clutch, and the output shaft of the second transmission is connected to the first transmission system.

[0026] Specifically, when the dual clutch connects the generator to the engine, the engine can drive the generator to generate electrical energy, and the generator can output the generated electrical energy to the battery system; when the dual clutch connects the generator to the first transmission system, the generator is connected to the first transmission system, and the generator can drive the first side wheel through the first transmission system; when the dual clutch connects the engine to the first transmission system, the engine can drive the first side wheel through the first transmission system.

[0027] With the electric vehicle drive system described above, the engine can be connected to the first power system through a transmission and a clutch. When the engine directly drives the electric vehicle, the number of components in the power transmission path can be reduced, thereby improving the driving efficiency of the electric vehicle.

[0028] In one possible implementation, the connecting components include a first transmission and a dual clutch.

[0029] The generator is connected to the engine via a dual-clutch transmission; the input shaft of the first transmission is connected to both the engine and the generator via a dual-clutch transmission; and the output shaft of the first transmission is connected to the first transmission system.

[0030] Specifically, when the dual clutch connects the generator to the engine, the engine can drive the generator to generate electrical energy, and the generator can output the generated electrical energy to the battery system; when the dual clutch connects the generator to the first transmission system, the generator can drive the first side wheel through the first transmission system; when the dual clutch connects the engine to the first transmission system, the engine can drive the first side wheel through the first transmission system.

[0031] With the electric vehicle drive system described above, there is no speed increase or decrease between the generator and the engine, thereby reducing the number of power transmission devices between generators and improving power generation efficiency.

[0032] In one possible implementation, the connecting components include: a first gearbox, a second gearbox, and a synchronizer.

[0033] The synchronizer's engagement teeth are connected to the output shaft of the first transmission and the input shaft of the second transmission, respectively. The synchronizer's hub is connected to the generator. The input shaft of the first transmission is connected to the engine. The input shaft of the second transmission is connected to the generator. The output shaft of the second transmission is connected to the first transmission system.

[0034] Specifically, when the synchronizer connects the engine to the generator, the engine can drive the generator to generate electrical energy, and the generator can output the generated electrical energy to the battery system; when the synchronizer connects the generator to the first transmission system, the generator can drive the first side wheel through the first transmission system.

[0035] By using the above-mentioned electric vehicle drive system, the connection between the generator and the engine, as well as the connection between the generator and the first transmission system, can be controlled by a synchronizer, thereby eliminating the need for a clutch and reducing the number of components and drive control costs of the electric vehicle drive system.

[0036] In one possible implementation, the connecting components include a first gearbox and a synchronizer.

[0037] The synchronizer's engagement teeth are connected to the input shaft of the first transmission and the generator, respectively, and the synchronizer's hub is connected to the generator; the input shaft of the first transmission is connected to the generator, and the output shaft of the first transmission is connected to the first transmission system.

[0038] Specifically, when the synchronizer connects the engine to the generator, the engine can drive the generator to generate electrical energy, and the generator can output the generated electrical energy to the battery system.

[0039] When the synchronizer connects the generator to the first transmission system, the generator can drive the first wheel on the first side through the first transmission system.

[0040] With the electric vehicle drive system described above, there is no speed increase or decrease between the generator and the engine, thereby reducing the power transmission devices between generators and improving the driving efficiency of the electric motor.

[0041] In one possible implementation, the second powertrain includes an electric motor and a third transmission.

[0042] The electric motor is connected to the battery system; the input shaft of the third transmission is connected to the electric motor, and the output shaft of the third transmission is connected to the second transmission system.

[0043] In one possible implementation, the first transmission includes either a reducer or a speed increaser.

[0044] Secondly, embodiments of this application provide an electric vehicle, which includes a body, a first side wheel, a second side wheel, and a drive system for the electric vehicle as described in any of the above-mentioned technical solutions of this application. Since the generator in the electric vehicle drive system proposed in this application can also drive the electric vehicle, achieving generator reuse, the electric vehicle of this application possesses the advantages of improved driving efficiency and simplified structure. Attached Figure Description

[0045] Figure 1 A schematic diagram of the structure of an electric vehicle drive system provided in this application embodiment. Figure 1 ;

[0046] Figure 2 A schematic diagram of the structure of an electric vehicle drive system provided in this application embodiment. Figure 2 ;

[0047] Figure 3 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 1 ;

[0048] Figure 4 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 2 ;

[0049] Figure 5 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 3 ;

[0050] Figure 6 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 4 ;

[0051] Figure 7 A schematic diagram of a drive system for an electric vehicle provided in this application embodiment. Figure 3 ;

[0052] Figure 8 A schematic diagram of a drive system for an electric vehicle provided in this application embodiment. Figure 4 ;

[0053] Figure 9 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 5 ;

[0054] Figure 10 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 6 ;

[0055] Figure 11 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 7 ;

[0056] Figure 12 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 8 ;

[0057] Figure 13 A schematic diagram of a drive system for an electric vehicle provided in this application embodiment. Figure 5 ;

[0058] Figure 14 A schematic diagram of a drive system for an electric vehicle provided in this application embodiment. Figure 6 ;

[0059] Figure 15 A schematic diagram of a drive system for an electric vehicle provided in this application embodiment. Figure 7 ;

[0060] Figure 16 A schematic diagram of a drive system for an electric vehicle provided in this application embodiment. Figure 8 ;

[0061] Figure 17 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 9 ;

[0062] Figure 18 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 10 ;

[0063] Figure 19 A schematic diagram of power transmission for driving an electric vehicle drive system provided in this application embodiment. Figure 10 one;

[0064] Figure 20 A schematic diagram of a drive system for an electric vehicle provided in this application embodiment. Figure 9 . Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0066] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise.

[0067] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0068] With the development of electric vehicles, the required driving range is increasing. To meet this demand, range-extended hybrid electric vehicles (REEVs) are widely used because they can provide power to the electric vehicle even when the battery is low. Specifically, a REEV requires a generator and an engine. The engine drives the generator to produce electricity, which is then supplied to the battery, thus meeting the electric vehicle's power needs even when the battery is low. However, REEVs require a separate generator, which occupies internal space, increases power consumption, and raises the overall cost.

[0069] To address the aforementioned problems, this application provides an electric vehicle drive system and an electric vehicle. (Refer to...) Figure 1 The electric vehicle drive system may include a first powertrain 1, a second powertrain 2, a first transmission system 3, a second transmission system 4, and a battery system 5.

[0070] In this design, powertrain 1 is connected to a first transmission system 3, which drives the first wheel of the electric vehicle. The second powertrain 2 is connected to a second transmission system 4, which drives the second wheel of the electric vehicle. It should be noted that in this application, one of the first and second wheels is the front wheel, and the other is the rear wheel. That is, the first transmission system 3 drives the front wheel of the electric vehicle, and the second transmission system 4 drives the rear wheel; or, the first transmission system 3 drives the rear wheel, and the second transmission system 4 drives the front wheel.

[0071] The first powertrain 1 includes a generator and an engine (not shown). The engine is used to drive the generator to produce electrical energy, or to drive the first side wheel via the first transmission system 3. The generator is used to drive the first side wheel via the first transmission system 3, or to output the generated electrical energy to the battery system 4.

[0072] The second powertrain 2 is used to drive the second side wheel via the second transmission system 4.

[0073] The battery system 5 is connected to the generator and the second power assembly 2 to receive electrical energy output from the generator and to output the stored electrical energy to the second power assembly 2 and / or the generator.

[0074] Using the above-mentioned electric vehicle drive system, when driving the electric vehicle, the second powertrain 2 can drive the second side wheel through the second transmission system 4, and the generator or engine in the first powertrain 1 can drive the first side wheel through the first transmission system 3. At this time, the generator can be used not only as a generator, but also as a motor, realizing the reuse of the generator. Therefore, it is not necessary to configure a motor separately, nor is it necessary to reserve space for configuring a generator, thereby reducing the number of components in the electric vehicle, reducing the volume occupied by the electric vehicle drive system, and reducing the cost of the electric vehicle.

[0075] The electric vehicle drive system provided in this application can use a first powertrain 1 to power the electric vehicle, i.e., front-wheel drive mode; or it can use a second powertrain 2 to power the electric vehicle, i.e., rear-wheel drive mode. To increase the overall vehicle output power and improve acceleration performance, a four-wheel drive mode can also be used, where the first powertrain 1 and the second powertrain 2 jointly power the electric vehicle. In this case, the two powertrains can be asynchronous, electrically excited, synchronous, or other similar configurations. The electric vehicle drive system can switch between front-wheel drive mode, rear-wheel drive mode, and four-wheel drive mode.

[0076] In a specific implementation, the electric vehicle drive system may also include a controller, which can be used to switch between front-wheel drive mode, rear-wheel drive mode and four-wheel drive mode, and to control the power output of the electric vehicle in each mode.

[0077] In one possible implementation, the first powertrain 1 also includes a connecting assembly. Specifically, the engine and the generator are connected via the connecting assembly; the engine and the first transmission system 3 are connected via the connecting assembly; and the generator and the first transmission system 3 are connected via the connecting assembly.

[0078] The electric vehicle drive system architecture provided in this application will be further illustrated by specific embodiments below. It should be noted that the embodiments in this application are for better explanation of the present invention, but do not limit the present invention.

[0079] Example 1

[0080] Figure 2 A schematic diagram of the structure of an electric vehicle drive system according to an embodiment of this application is shown as an example. See also Figure 2 In this embodiment, the first powertrain 1 may include a generator 11, an engine 12, a first transmission 13, a second transmission 14, a first clutch 15, and a second clutch 16; the second powertrain 2 includes an electric motor 17 and a third transmission 18. The first transmission 13, the second transmission 14, the first clutch 15, and the second clutch constitute a connecting assembly.

[0081] It should be understood that when the first clutch 15 is engaged, the generator 11 is connected to the engine 12. At this time, the engine 12 can drive the generator 11 to generate electrical energy, and the generator 11 can output the generated electrical energy to the battery system 5. When the second clutch 16 is engaged, the generator 11 can be connected to the first transmission system 3, and the generator 11 can drive the first side wheel through the first transmission system 3. When the first clutch 15 and the second clutch 16 are engaged, the engine 12 can be connected to the first transmission system 3, and the engine 12 can drive the first side wheel through the first transmission system 3.

[0082] In a specific implementation, the input shaft of the first transmission 13 is connected to the engine 12 via the first clutch 15, and the output shaft of the first transmission 13 is connected to the generator 11; the input shaft of the second transmission 14 is connected to the generator 11 via the second clutch 15, and the output shaft of the second transmission 14 is connected to the first transmission system 2; the input shaft of the third transmission 18 is connected to the electric motor 17, and the output shaft of the third transmission is connected to the second transmission system 3; both the first generator 11 and the electric motor 17 are connected to the battery system 4.

[0083] The first transmission 13 can be either a reducer or a speed increaser, while the second transmission 14 and the third transmission 18 are both reducers. It should be noted that the first transmission 13, the second transmission 14, and the third transmission can be single-speed or multi-speed transmissions. Furthermore, the first transmission 13, the second transmission 14, and the third transmission can be either a fixed-axis gear train or a planetary gear train.

[0084] In a specific implementation, the first clutch 15 can be a one-way clutch. The second clutch 16 can be located inside the second transmission 14, and similarly, the first clutch 15 can be located inside the first transmission 13. It should be understood that the first clutch 15 and the second clutch 16 in this application can also be replaced by other devices with power engagement and disengagement capabilities, such as synchronizers or gear sleeves.

[0085] Below, in conjunction with Figure 2 The drive method of the electric vehicle drive system is explained in detail below:

[0086] When the electric vehicle is driving normally, if the remaining capacity of the battery system 5 can meet the current power demand of the electric vehicle, and the electric vehicle's power demand is not high, the battery system 5 can output the stored electrical energy to the motor 17. The motor 17 rotates and is transmitted to the third transmission 18 through the input shaft of the third transmission 18. After passing through the gear transmission inside the third transmission 18, the power is output to the output shaft of the third transmission 18 and supplied to the electric vehicle for driving through the second transmission system 4. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 3 As shown.

[0087] When the electric vehicle is driving normally, if the remaining capacity of the battery system 5 can meet the current power demand of the electric vehicle, and the electric vehicle has a high power demand, the battery system 5 can output the stored electrical energy to the motor 17. The motor 17 rotates and is transmitted to the third transmission 18 through the input shaft of the third transmission 18. After gear transmission inside the third transmission 18, the power is output to the output shaft of the third transmission 18 and supplied to the electric vehicle for driving through the second transmission system 4. At the same time, the second clutch 16 controls the generator 11 to engage with the second transmission 14. The battery system 5 outputs the stored electrical energy to the generator 11. The generator 11 rotates as a motor and is transmitted to the second transmission 14 through the input shaft of the second transmission 14. After gear transmission inside the second transmission 14, the power is output to the output shaft of the second transmission 14 and supplied to the electric vehicle for driving through the first transmission system 3. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 4 As shown.

[0088] When the electric vehicle is driving normally, if the remaining capacity of the battery system 5 is insufficient to meet the current power demand of the electric vehicle, and the electric vehicle's power demand is not high, the first clutch 15 controls the engine 12 to engage with the first transmission 13. The engine 12 drives the generator 11 to rotate, the generator 11 generates electrical energy, and outputs the generated electrical energy to the connected battery system 5. At the same time, the battery system 5 outputs the stored electrical energy to the electric motor 17. The electric motor 17 rotates and is transmitted to the third transmission 18 through the input shaft of the third transmission 18. After passing through the gear transmission inside the third transmission 18, the power is output to the output shaft of the third transmission 18 and supplied to the electric vehicle for propulsion through the second transmission system 4. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 5 As shown.

[0089] When the electric vehicle is driving normally, if the electric vehicle has a high power demand or needs to achieve high driving efficiency, the first clutch 15 controls the engagement of the engine 12 with the first transmission 13, and the second clutch 16 controls the engagement of the first transmission 13 with the second transmission 14. The power output from the engine 12 is sequentially input to the first transmission 13 and the second transmission 14. After passing through the gear transmissions inside the first transmission 13 and the second transmission 14, the power is output to the output shaft of the second transmission 14 and then supplied to the electric vehicle for propulsion through the first transmission system 3. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 6 As shown.

[0090] In actual use, in order to eliminate vibrations during the electric vehicle driving process and improve the driver's driving experience, a damping device, such as a torque damper or a dual-mass flywheel, can also be connected between the generator 11 and the first clutch 15.

[0091] Combined with reference Figure 2 and Figure 6 In the above embodiments, the engine and generator can operate at the same speed. See also... Figure 7 As shown, the first powertrain 1 may include: a generator 21, an engine 22, a first transmission 23, a first clutch 24, and a second clutch 25; the second powertrain 2 may include an electric motor 26 and a third transmission 27. The first transmission 23, the first clutch 24, and the second clutch 25 constitute a connecting assembly.

[0092] In a specific implementation, engine 22 is connected to generator 21 via first clutch 24; the input shaft of first transmission 23 is connected to generator 21 via second clutch 25, and the output shaft of first transmission 23 is connected to first transmission system 3; the input shaft of third transmission 27 is connected to electric motor 26, and the output shaft of third transmission is connected to second transmission system 4; both first generator 21 and electric motor 26 are connected to battery system 5.

[0093] It should be understood that when the first clutch 24 is engaged, the engine 22 can be connected to the generator 21. At this time, the engine 22 drives the generator 21 to generate electrical energy, and the generator 21 can output the generated electrical energy to the battery system 5. When the second clutch 25 is engaged, the generator 21 can be connected to the first transmission system 3, and the generator 21 can drive the first side wheel through the first transmission system 3. When the first clutch 24 and the second clutch 25 are engaged, the engine 22 can be connected to the first transmission system 3. At this time, the engine 22 drives the first side wheel through the first transmission system 3.

[0094] Example 2

[0095] Figure 8 A schematic diagram of the structure of an electric vehicle drive system according to an embodiment of this application is shown as an example. See also Figure 8 In this embodiment, the first powertrain 1 may include a generator 31, an engine 32, a first transmission 33, a second transmission 34, and a first clutch 35; the second powertrain 2 includes an electric motor 36 and a third transmission 37.

[0096] In a specific implementation, the input shaft of the first transmission 33 is connected to the engine 32 via the first clutch 35, and the output shaft of the first transmission 33 is connected to the engine 31; the input shaft of the second transmission 34 is connected to the generator 31, and the output shaft of the second transmission 34 is connected to the first transmission system 3; the input shaft of the third transmission 37 is connected to the electric motor 36, and the output shaft of the third transmission 37 is connected to the second transmission system 4; both the first generator 31 and the electric motor 36 are connected to the battery system 5.

[0097] It should be understood that when the first clutch 35 is engaged, the engine 32 can be connected to the generator 31. At this time, the engine 32 can drive the generator 31 to generate electrical energy, and the generator 31 can output the generated electrical energy to the battery system. When the synchronizer connects the generator 31 to the first transmission system 3, the generator 31 can drive the first wheel through the first transmission system 3. When the first clutch 35 is engaged and the synchronizer connects the generator 31 to the first transmission system 3, the engine 32 can be connected to the first transmission system. At this time, the engine 32 can drive the first wheel through the first transmission system.

[0098] The first transmission 33 can be either a reducer or a speed increaser. The third transmission 37 is always a reducer. It should be noted that the first transmission 33 and the third transmission 37 can be single-speed or multi-speed transmissions. The first transmission 33, the second transmission 34, and the third transmission can be either fixed-axis gear trains or planetary gear trains.

[0099] It should be noted that the second transmission 34 is equipped with a synchronizer. The engagement teeth of the synchronizer can be set on the two-stage transmission gears of the second transmission 34 to enable the second transmission 34 to be in neutral. When the second transmission 34 is in non-neutral, the generator 31 engages with the first transmission system 3 through the second transmission 34. When the second transmission 34 is in neutral, the engagement between the generator and the first transmission system 3 is disconnected.

[0100] In a specific implementation, the first clutch 35 can be a one-way clutch. Alternatively, the first clutch 35 can be located within the first transmission 33. It should be understood that the first clutch 15 in this application can also be replaced by other devices capable of power engagement and disengagement, such as a synchronizer or a gear sleeve.

[0101] Below, in conjunction with Figure 8 The drive method of the electric vehicle drive system is explained in detail below:

[0102] When the electric vehicle is driving normally, if the remaining capacity of the battery system 5 can meet the current power demand of the electric vehicle, and the electric vehicle's power demand is not high, the battery system 5 can output the stored electrical energy to the motor 36. The motor 36 rotates and is transmitted to the third transmission 37 through the input shaft of the third transmission 37. After gear transmission inside the third transmission 37, the power is output to the output shaft of the third transmission 37 and supplied to the electric vehicle for propulsion through the second transmission system 4. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 9 As shown.

[0103] When the electric vehicle is driving normally, if the remaining capacity of the battery system 5 can meet the current power demand of the electric vehicle, and the electric vehicle has a high power demand, the battery system 5 can output the stored electrical energy to the motor 36. The motor 36 rotates and is transmitted to the third transmission 37 via the input shaft of the third transmission 37. After gear transmission inside the third transmission 37, the power is output to the output shaft of the third transmission 37 and supplies power to the electric vehicle through the second transmission system 4. At the same time, the battery system 5 outputs the stored electrical energy to the generator 31. The generator 31 rotates as a motor and is transmitted to the second transmission 34 via the input shaft of the second transmission 34. After gear transmission inside the second transmission 34, the power is output to the output shaft of the second transmission 34 and supplies power to the electric vehicle through the first transmission system 3. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 10 As shown.

[0104] When the electric vehicle is driving normally, if the remaining capacity of the battery system 5 cannot meet the current power demand of the electric vehicle, and the electric vehicle's power demand is not high, the first clutch 35 controls the engine 32 to engage with the first transmission 33. The engine 32 drives the generator 31 to rotate, the generator 31 generates electrical energy, and outputs the generated electrical energy to the connected battery system 5. At the same time, the battery system 5 outputs the stored electrical energy to the electric motor 36. The electric motor 36 rotates and is transmitted to the third transmission 37 through the input shaft of the third transmission 37. After gear transmission inside the third transmission 37, the power is output to the output shaft of the third transmission 37 and supplied to the electric vehicle for driving through the second transmission system 4. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 11 As shown.

[0105] When the electric vehicle is driving normally, if the electric vehicle has a high power demand or needs to achieve high driving efficiency, the first clutch 35 controls the engine 32 to engage with the first transmission 33. The power output from the engine 32 is sequentially input to the first transmission 33 and the second transmission 34. After gear transmission within the first transmission 33 and the second transmission 34, the power is output to the output shaft of the second transmission 34 and then supplied to the electric vehicle for propulsion through the first transmission system 3. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 12 As shown.

[0106] In actual use, in order to eliminate vibrations during the electric vehicle driving process and improve the driver's driving experience, a damping device, such as a torque damper or a dual-mass flywheel, can also be connected between the generator 31 and the first clutch 35.

[0107] Combined with reference Figure 8 and Figure 12 In the above embodiments, the engine and generator can operate at the same speed. See also... Figure 13 As shown, the first powertrain 1 includes a generator 41, an engine 42, a first transmission 43, and a first clutch 44; the second powertrain 2 may include an electric motor 45 and a third transmission 46. The first transmission 43 and the first clutch 44 constitute a connecting assembly.

[0108] For specific implementation details, please refer to [link / reference]. Figure 13 As shown, generator 41 is connected to engine 42 via first clutch 45; the input shaft of first transmission 43 is connected to generator 41, and the output shaft of first transmission 43 is connected to first transmission system 3; the input shaft of third transmission 46 is connected to motor 45, and the output shaft of third transmission 46 is connected to second transmission system 4; both first generator 41 and motor 45 are connected to battery system 5.

[0109] It should be understood that when the first clutch 44 is engaged, the engine 42 can be connected to the generator 41. At this time, the engine 42 can drive the generator 41 to generate electrical energy, and the generator 41 can output the generated electrical energy to the battery system 5. When the synchronizer connects the generator 41 to the first transmission system 3, the generator 41 drives the first side wheel through the first transmission system 3. When the first clutch 44 is engaged and the synchronizer connects the generator 41 to the first transmission system 3, the engine 42 can be connected to the first transmission system 3. At this time, the engine 42 can drive the first side wheel through the first transmission system 3.

[0110] Example 3

[0111] Figure 14 A schematic diagram of the structure of an electric vehicle drive system according to an embodiment of this application is shown as an example. See also Figure 14 In this embodiment, the first powertrain 1 may include a generator 51, an engine 52, a first transmission 53, a second transmission 54, and a dual-clutch 55; the second powertrain 2 may include an electric motor 56 and a third transmission 57. The first transmission 53, the second transmission 54, and the dual-clutch 55 constitute a connecting assembly. The dual-clutch 55 includes three ports: port 551, port 552, and port 553.

[0112] In specific implementation, the input shaft of the first transmission 53 is connected to the engine 52, and the output shaft of the first transmission 53 is connected to the first output shaft 552 of the dual clutch 55; the input shaft of the second transmission 54 is connected to the second output shaft 553 of the dual clutch 55, and the output shaft of the second transmission 54 is connected to the first transmission system 2; the input end 551 of the dual clutch 55 is connected to the generator 51; the input shaft of the third transmission 57 is connected to the electric motor 56, and the output shaft of the third transmission 57 is connected to the second transmission system 3; both the first generator 51 and the electric motor 56 are connected to the battery system 4.

[0113] It should be understood that when port 552 and port 551 of the dual clutch 55 are engaged, the generator 51 is connected to the engine 52 through the first transmission 53. At this time, the engine 52 can drive the generator 51 to generate electrical energy, and the generator 51 can output the generated electrical energy to the battery system 5. When port 552 and port 553 of the dual clutch 55 are engaged, the generator 51 can be connected to the first transmission system 3 through the first transmission 53 and the second transmission 54. The generator 51 can drive the first wheel through the first transmission system 3. When ports 551 and 553 of the dual clutch 55 are engaged, the engine 52 can be connected to the first transmission system 3 through the second transmission 54. The engine 52 can drive the first wheel through the first transmission system 3.

[0114] In this system, the first transmission 53 can be either a reducer or a speed increaser, while the second transmission 54 and the third transmission 57 are both reducers. It should be noted that the first transmission 53, the second transmission 54, and the third transmission 57 can be single-speed or multi-speed transmissions. Furthermore, the first transmission 53, the second transmission 54, and the third transmission 57 can be either a fixed-axis gear train or a planetary gear train.

[0115] In a specific implementation, the dual-clutch 55 can be located within the first transmission 53. It should be understood that the dual-clutch 55 in this application can also be replaced by other devices with power engagement and disengagement capabilities, such as synchronizers or gear sleeves.

[0116] It should be noted that, Figure 14 The driving method of the electric vehicle drive system shown is the same as... Figure 2 The driving methods shown are the same, and will not be described again in this application.

[0117] In actual use, in order to eliminate vibrations during the electric vehicle driving process and improve the driver's driving experience, a damping device, such as a torque damper or a dual-mass flywheel, can be connected between the generator 51 and the dual clutch 55.

[0118] Combined with reference Figure 8 and Figure 12 In the above embodiments, the engine and generator can operate at the same speed. In this case, as... Figure 15 As shown, the first powertrain 1 may include a generator 61, an engine 62, a first transmission 63, and a dual-clutch 64; the second powertrain 2 may include an electric motor 65 and a third transmission 66. The first transmission 63 and the dual-clutch 64 constitute a connecting assembly. The dual-clutch 64 includes three ports: port 641, port 642, and port 643.

[0119] In a specific implementation, generator 61 is connected to engine 62 via dual clutch 64; the input shaft of first transmission 63 is connected to engine 62 and generator 61 via dual clutch 64, and the output shaft of first transmission 63 is connected to first transmission system 2; the input shaft of third transmission 66 is connected to electric motor 65, and the output shaft of third transmission 66 is connected to second transmission system 4; both generator 61 and electric motor 65 are connected to battery system 5.

[0120] It should be understood that when ports 641 and 642 of the dual clutch 64 are engaged, the generator 61 is connected to the engine 62. At this time, the engine 62 can drive the generator 61 to generate electrical energy, and the generator 61 can output the generated electrical energy to the battery system 5. When ports 643 and 642 of the dual clutch 64 are engaged, the generator 61 can be connected to the first transmission system 3 through the first gearbox 63, and the generator 61 can drive the first wheel on the first side through the first transmission system 3. When ports 641 and 643 of the dual clutch 64 are engaged, the engine 62 can be connected to the first transmission system 3 through the first gearbox 63, and the engine 62 can drive the first wheel on the first side through the first transmission system 3.

[0121] Example 4

[0122] Figure 16 A schematic diagram of the structure of an electric vehicle drive system according to an embodiment of this application is shown as an example. See also Figure 16 In this embodiment, the first powertrain 1 may include a generator 71, an engine 72, a first transmission 73, a second transmission 74, and a synchronizer 75; the second powertrain 2 may include an electric motor 76 and a third transmission 77. The first transmission 73, the second transmission 74, and the synchronizer 75 constitute a connecting assembly.

[0123] In a specific implementation, the engagement teeth of synchronizer 75 are connected to the output shaft of first transmission 73 and the input shaft of second transmission 74, respectively, and the hub of synchronizer is connected to generator 11; the input shaft of first transmission 73 is connected to engine 72; the input shaft of second transmission 74 is connected to generator 71, and the output shaft of second transmission 74 is connected to first transmission system 3; the input shaft of third transmission 77 is connected to electric motor 76, and the output shaft of third transmission is connected to second transmission system 4; both first generator 71 and electric motor 76 are connected to battery system 5.

[0124] It should be understood that when the synchronizer 75 connects the engine 72 to the generator 71, the engine 72 can drive the generator 71 to generate electrical energy, and the generator 71 can output the generated electrical energy to the battery system 5; when the synchronizer 75 connects the generator 71 to the first transmission system 3, the generator 71 drives the first side wheel through the first transmission system 3.

[0125] In this system, the first transmission 73 can be either a reducer or a speed increaser, while the second transmission 74 and the third transmission 77 are both reducers. It should be noted that the first transmission 73, the second transmission 74, and the third transmission 77 can be single-speed or multi-speed transmissions. Furthermore, the first transmission 73, the second transmission 74, and the third transmission 77 can be either a fixed-axis gear train or a planetary gear train.

[0126] Below, in conjunction with Figure 16 The drive method of the electric vehicle drive system is explained in detail below:

[0127] When the electric vehicle is driving normally, if the remaining capacity of the battery system 5 can meet the current power demand of the electric vehicle, and the electric vehicle's power demand is not high, the battery system 5 can output the stored electrical energy to the motor 76. The motor 76 rotates and is transmitted to the third transmission 77 through the input shaft of the third transmission 77. After passing through the gear transmission inside the third transmission 77, the power is output to the output shaft of the third transmission 77 and supplied to the electric vehicle for propulsion through the second transmission system 4. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 17 As shown.

[0128] When the electric vehicle is driving normally, if the remaining capacity of the battery system 5 can meet the current power demand of the electric vehicle, and the electric vehicle has a high power demand, the battery system 5 can output the stored electrical energy to the motor 76. The motor 76 rotates and is transmitted to the third transmission 77 through the input shaft of the third transmission 77. After gear transmission inside the third transmission 77, the power is output to the output shaft of the third transmission 77 and supplied to the electric vehicle for driving through the second transmission system 4. At the same time, the battery system 5 outputs the stored electrical energy to the generator 71. The synchronizer 75 is transmitted to the second transmission 74 through gear transmission inside the second transmission 74. The generator 71 rotates as a motor and is transmitted to the second transmission 74 through the input shaft of the second transmission 74. After gear transmission inside the second transmission 74, the power is output to the output shaft of the second transmission 74 and supplied to the electric vehicle for driving through the first transmission system 3. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 18 As shown.

[0129] When the electric vehicle is driving normally, if the remaining capacity of the battery system 5 is insufficient to meet the current power demand of the electric vehicle, and the electric vehicle's power demand is not high, the synchronizer 75 controls the engine 72 to engage with the generator 71. The engine 72 drives the generator 71 to rotate, and the generator 71 generates electrical energy, which is then output to the connected battery system 5. Simultaneously, the battery system 5 outputs its stored electrical energy to the electric motor 76. The electric motor 76 rotates and transmits power through the input shaft of the third transmission 77 to the third transmission 77. After passing through the gears inside the third transmission 77, power is output to the output shaft of the third transmission 77 and supplied to the electric vehicle for propulsion via the second transmission system 4. Specifically, the power transmission path of the electric vehicle can be found in [reference needed]. Figure 19 As shown.

[0130] In actual use, in order to eliminate vibrations during the electric vehicle driving process and improve the driver's driving experience, a damping device, such as a torque damper or a dual-mass flywheel, can also be connected between the generator 71 and the synchronizer 75.

[0131] Combined with reference Figures 16 to 19 In the above embodiments, the engine and generator can operate at the same speed. See also... Figure 20 As shown, the first powertrain 1 may include a generator 81, an engine 82, a first transmission 83, and a synchronizer 84; the second powertrain 2 includes an electric motor 85 and a third transmission 86. The first transmission 86 and the synchronizer 84 constitute a connecting assembly.

[0132] In a specific implementation, the engagement teeth of synchronizer 84 are connected to the input shaft of the first transmission 83 and the engine 82 respectively, and the hub of synchronizer 84 is connected to generator 81; the input shaft of the first transmission 83 is connected to generator 81, and the output shaft of the first transmission 83 is connected to the first transmission system 3; the input shaft of the third transmission 86 is connected to motor 85, and the output shaft of the third transmission 86 is connected to the second transmission system 3; both the first generator 81 and the motor 85 are connected to battery system 5.

[0133] It should be understood that when the synchronizer 84 connects the engine 82 to the generator 81, the engine 82 can drive the generator 81 to generate electrical energy, and the generator 81 can output the generated electrical energy to the battery system 5; when the synchronizer 84 connects the generator 81 to the first transmission system 3, the generator 81 can drive the first side wheel through the first transmission system 3.

[0134] It should be noted that, Figure 20 The driving method of the electric vehicle drive system shown is the same as... Figure 16 The driving methods shown are the same, and will not be described again in this application.

[0135] This application also provides an electric vehicle having wheels, a first side wheel, a second side wheel, and an electric vehicle drive system as described above. In the electric vehicle's powertrain, when driving the vehicle, the generator can act as an electric motor, achieving generator reuse and eliminating the need for a separate electric motor. This reduces the number of components in the electric vehicle drive system, lowers the driving cost of the electric vehicle, and increases the usable space for passengers.

[0136] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electric vehicle drive system, characterized in that, include: A first powertrain, a second powertrain, a first transmission system, and a second transmission system; wherein: The first powertrain is connected to the first transmission system, which is used to drive the first side wheel of the electric vehicle; The second powertrain is connected to the second transmission system, which is used to drive the second side wheel of the electric vehicle; The first powertrain includes a generator and an engine, the engine being used to drive the generator to generate electrical energy, or to drive the first side wheel via the first transmission system; the generator being used to drive the first side wheel via the first transmission system, or to output the generated electrical energy to a battery system; The second powertrain is used to drive the second side wheel via the second transmission system; The first powertrain also includes: a connection component; The engine and the generator are connected via the connecting assembly; The engine and the first transmission system are connected via the connecting assembly. The generator and the first transmission system are connected via the connecting assembly. The connecting assembly includes: a first transmission, a second transmission, a first clutch, and a second clutch; The input shaft of the first transmission is connected to the engine via the first clutch, and the output shaft of the first transmission is connected to the generator; The input shaft of the second transmission is connected to the generator via the second clutch, and the output shaft of the second transmission is connected to the first transmission system; When the first clutch is engaged, the engine drives the generator to generate electrical energy, and the generator outputs the generated electrical energy to the battery system; When the second clutch is engaged, the generator drives the first side wheel through the first transmission system; When the first clutch and the second clutch are engaged, the engine drives the first side wheel through the first transmission system.

2. The electric vehicle drive system as described in claim 1, characterized in that, The second powertrain includes: an electric motor and a third transmission; The electric motor is connected to the battery system; the input shaft of the third transmission is connected to the electric motor, and the output shaft of the third transmission is connected to the second transmission system.

3. The electric vehicle drive system as described in claim 1 or 2, characterized in that, The first transmission includes either a reducer or a speed increaser.

4. An electric vehicle, characterized in that, It includes a vehicle body, a first side wheel, a second side wheel, and an electric vehicle drive system as described in any one of claims 1-3.

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