Drive system and vehicle

Abstract

This application belongs to the field of vehicle technology, specifically relating to drive systems and vehicles. The drive system includes an engine, a first drive unit, a second drive unit, and a power battery. The first drive unit is connected to the engine and includes a first motor controller and a first motor assembly, with the first motor controller connected to the first motor assembly. The second drive unit includes a step-up transformer, a second motor controller, and a second motor assembly, with the second motor controller connected to both the step-up transformer and the second motor assembly. The power battery is electrically connected to the first motor controller and the step-up transformer. Based on the operating mode of the drive system, the step-up transformer is controlled to switch between an off and on state. In pure electric mode, the vehicle can be driven without the step-up transformer, reducing component losses associated with it and increasing the pure electric driving range. Using a step-up transformer can reduce motor size, lower costs, and lighten vehicle weight, while improving motor efficiency and achieving overall fuel savings.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicles, and particularly relates to a driving system and a vehicle. BACKGROUND

[0002] With economic development and technological progress, the automobile not only plays a role of a tool for walking in a fast-paced and efficient life, but also is a second mobile home in people's minds. Therefore, the functions of the automobile are more and more, and the requirements of intelligence, comfort and power are higher and higher. At the same time, the growth of the vehicle population, the depletion of fossil energy and the deterioration of the atmospheric environment also bring a series of social problems. The state formulates emission regulations, issues incentive policies and formulates long-term plans to vigorously promote the development of clean and renewable energy, which is a great development opportunity for the new energy automobile industry. At the same time, the continuous deterioration of the living environment also awakens people's energy-saving and environmental protection consciousness, directly promoting the development of the new energy automobile market. In view of the imperfect supporting facilities and short driving range, the popularization of pure electric vehicles still needs time, so hybrid vehicles emerge as the times require and are widely respected, and major automobile companies are actively developing related systems.

[0003] Among them, the step-up transformer electric drive technology in the hybrid vehicle can reduce the size of the motor, improve the efficiency of the motor and achieve the effect of saving fuel of the whole vehicle. At present, it is more and more applied in hybrid vehicles.

[0004] But in a certain working mode, although the step-up transformer can optimize the motor efficiency by optimizing the working voltage, due to the increase of the step-up transformer in the whole circuit, it will bring certain loss and reduce the fuel saving effect of the whole vehicle. SUMMARY

[0005] The purpose of the application is to provide a driving system and a vehicle, which can reduce the size of the motor, improve the efficiency of the motor and achieve the effect of saving fuel of the whole vehicle.

[0006] The first aspect of the application provides a driving system for a vehicle, the driving system comprising:

[0007] an engine;

[0008] a first driving device connected with the engine, the first driving device comprising a first motor controller and a first motor set, the first motor controller being connected with the first motor set;

[0009] a second driving device comprising a step-up transformer, a second motor controller and a second motor set, the step-up transformer being connected with the second motor controller, and the second motor controller being connected with the second motor set;

[0010] a power battery, the power battery being electrically connected with the first motor controller and the step-up transformer;

[0011] According to the working mode of the driving system, the step-up transformer is controlled to switch between the closed state and the open state.

[0012] In an exemplary embodiment of the present application, when the driving system works in the pure electric driving mode, the power battery has an electric quantity greater than a preset electric quantity threshold, and the accelerator pedal opening degree is less than a preset accelerator pedal opening degree, the step-up transformer is controlled to be in the closed state, and the first driving device is driven in the pure electric driving mode.

[0013] In an exemplary embodiment of the present application, when the driving system works in the parallel driving mode, the power battery has an electric quantity greater than a preset electric quantity threshold, the accelerator pedal opening degree is greater than a preset accelerator pedal opening degree, and the vehicle speed is greater than a preset vehicle speed threshold, the step-up transformer is in the closed state, the first driving device is driven in the parallel mode, and the second driving device is driven in the pure electric driving mode.

[0014] In an exemplary embodiment of the present application, when the driving system works in the series driving mode, the power battery has an electric quantity greater than a preset electric quantity threshold, the accelerator pedal opening degree is greater than a preset accelerator pedal opening degree, the step-up transformer is in the open state, the first driving device is driven in the series mode, and the second driving device is driven in the pure electric driving mode.

[0015] In an exemplary embodiment of the present application, when the driving system works in the series driving mode, the power battery has an electric quantity less than a preset electric quantity threshold, the step-up transformer is in the open state, and the first driving device is driven in the series mode.

[0016] In an exemplary embodiment of the present application, the power battery and the step-up transformer are electrically connected through a direct-current high-voltage line; and the power battery and the second motor controller are electrically connected through a direct-current high-voltage line.

[0017] In an exemplary embodiment of the present application, the step-up transformer and the second motor controller are electrically connected in parallel to the power battery, when the step-up transformer is in the closed state, the second motor group is driven in the pure electric driving mode alone, or the first motor group is driven in the pure electric driving mode alone, or the first motor group and the second motor group are driven in the pure electric driving mode together.

[0018] In an exemplary embodiment of the present application, the first motor group includes a first driving motor and a generator, the first motor controller is a double-motor controller, the first motor controller is electrically connected to the first driving motor and the generator, the generator is electrically connected to the power battery, or the generator and the first driving motor are both electrically connected to the power battery.

[0019] In an example embodiment of the present application, the first motor group comprises a first driving motor, the first motor controller is a single motor controller, the first motor controller is electrically connected with the first driving motor, and the first driving motor is electrically connected with the power battery.

[0020] In an example embodiment of the present application, the second motor group comprises a second driving motor, the second motor controller is a single motor controller, the second motor controller is electrically connected with the second driving motor.

[0021] In an example embodiment of the present application, the step-up transformer is connected in series between the power battery and the second motor controller, when the step-up transformer is in the closed state, the second motor group is not driven, and the first motor group is driven alone by pure electricity.

[0022] The second aspect of the present application provides a vehicle, which comprises the driving system of any one of the above.

[0023] The present application has the following beneficial effects:

[0024] The present application includes a driving system and a vehicle, the driving system comprising an engine, a first driving device, a power battery and a second driving device, the first driving device being connected with the engine, the first driving device comprising a first motor controller and a first motor group, the first motor controller being connected with the first motor group and capable of controlling the working state of the first motor group; the second driving device comprising a step-up transformer, a second motor controller and a second motor group, one end of the power battery being connected with the step-up transformer and the other end being connected with the first motor controller in the first driving device, the first motor controller being further connected with the first motor group, so that the first motor group can be driven by the power battery, and the step-up transformer is switched between the closed state and the open state according to the working mode of the driving system. The first motor group can drive the vehicle to move under the action of the power battery, so that the power battery does not need to pass through the step-up transformer to control the second motor group to drive the vehicle, thereby reducing the device loss caused by the step-up transformer and improving the pure electric cruising range D. In addition, the use of the step-up transformer in the present application can reduce the size of the motor, reduce the cost and the weight of the vehicle, improve the efficiency of the motor, and achieve the effect of saving fuel for the whole vehicle.

[0025] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0026] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application. It is to be understood that the drawings are only schematic, and that they do not necessarily represent a limiting case of the application. For a better understanding of the application, reference is made to the following descriptions of embodiments of the application in conjunction with the accompanying drawings, in which:

[0028] Figure 1 The structural block diagram of the power system provided by the embodiment one or the embodiment two of the application is shown.

[0029] Explanation of reference signs:

[0030] 100, engine; 200, first driving device; 201, first motor controller; 202, first driving motor; 203, generator; 300, power battery; 400, second driving device; 401, step-up transformer; 402, second motor controller; 403, second motor group. DETAILED DESCRIPTION

[0031] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0032] In the present application, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "assembly", "connection" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.

[0035] Embodiment one

[0036] Embodiment one of the present application provides a driving system applied to a vehicle. Referring to Figure 1 The driving system comprises:

[0037] an engine 100;

[0038] a first driving device 200, the first driving device 200 being connected with the engine 100, the first driving device 200 comprising a first motor controller 201 and a first motor group, one end of the first motor controller 201 being connected with a power battery 300 mentioned below, the other end of the first motor controller 201 being connected with the first motor group.

[0039] the power battery 300, one end of the power battery 300 being connected with the first motor controller 201 in the first driving device 200, the other end of the power battery 300 being connected with a step-up transformer 401 in a second driving device 400 described below.

[0040] the second driving device 400, the second driving device 400 comprising the step-up transformer 401, a second motor controller 402 and a second motor group 403, one end of the step-up transformer 401 being connected with the power battery 300, the other end of the step-up transformer 401 being connected with the second motor controller 402, the second motor controller 402 being connected with the second motor group 403 away from the other end of the step-up transformer 401; that is, the second motor controller 402 can control the working state of the second motor group 403 according to the electric quantity of the power battery 300 after passing through the step-up transformer 401.

[0041] Wherein, according to the working mode of the driving system, the step-up transformer 401 is switched between the closed state and the open state. The first driving device 200 can drive the vehicle in the pure electric mode under the action of the power battery 300, that is, the electric energy output by the power battery 300 can drive the vehicle without passing through the step-up transformer 401 and the second motor controller 402, but through the first motor group in the first driving device 200.

[0042] That is, the driving system can realize the pure electric mode by the power battery 300 and the first driving device 200 when in the pure electric working mode, control the step-up transformer 401 to be in the closed state, and realize the pure electric driving without using the power battery 300, the step-up transformer 401, the second motor controller 402 and the second motor set 403, so as to reduce the working of the step-up transformer 401, avoid the device loss caused by the step-up transformer 401, and achieve the fuel saving effect of the whole vehicle.

[0043] It can be understood that the step-up transformer 401 can reduce the size of the motor in the second motor set 403 under the same power demand, reduce the cost and reduce the weight of the vehicle, that is, the weight of the rear end of the vehicle can be reduced, the size of the rear end of the vehicle can be expanded, and the comfort can be improved. Moreover, the step-up transformer 401 can also improve the motor efficiency, and achieve the fuel saving effect of the whole vehicle. The power of the step-up transformer 401 can be matched with the size of the power battery 300, for example, can be 70kw to 180kw.

[0044] It should be noted that the first motor controller 201 is a double motor controller, the first motor set includes the first driving motor 202 and the generator 203, and the first driving motor 202 and the generator 203 are connected with the double motor controller (that is, the first motor controller 201). The generator 203 is electrically connected with the power battery 300, or the generator 203 and the first driving motor 202 are both electrically connected with the power battery 300, so as to be capable of charging the power battery 300, and when the power battery 300 is connected with the first driving motor 202, the first driving motor 202 can also drive the vehicle to run.

[0045] In some embodiments, the first motor controller 201 can also be a single motor controller, the first motor set only includes the first driving motor 202, the first motor controller 201 is electrically connected with the first driving motor 202, and the first driving motor 202 is electrically connected with the power battery 300.

[0046] In addition, since the step-up transformer 401 and the second motor controller 402 are connected in parallel to the power battery 300, when the step-up transformer 401 is in the closed state, the first motor set can be driven by pure electricity alone, or the second motor set 403 can be driven by pure electricity alone, or the first motor set and the second motor set 403 can be driven by pure electricity together, so that the vehicle is in the pure electric mode.

[0047] In the embodiment of the application, the second motor set 403 includes a second driving motor, the second motor controller 402 is a single motor controller, and the second motor controller 402 is electrically connected with the second driving motor.

[0048] It is worth mentioning that the power battery 300 can be connected with the step-up transformer 401 and the first motor controller 201 through direct current high-voltage lines to transmit the power of the power battery 300 to the step-up transformer 401 and the first motor controller 201.

[0049] The first driving device 200 can be connected with the engine 100 through spline mechanical connection or other connection modes, as long as the first driving device 200 can be connected with the engine 100, and the specific connection mode can be implemented according to different embodiments.

[0050] For example, for a plug-in hybrid electric vehicle (PHEV) model with a 100km pure electric cruising range, the vehicle can be driven in a front-drive pure electric mode according to the above driving system, which can reduce the device loss caused by the operation of the step-up transformer 401, achieve the effect of saving oil and electricity, and increase the pure electric cruising range to 101-110km.

[0051] In a possible embodiment of the application, when the battery power is greater than the preset power threshold, the driving system drives the vehicle to move in a front-drive pure electric mode, which can reduce the device loss caused by the step-up transformer 401 and achieve the effect of saving oil.

[0052] It is worth mentioning that in addition to driving the vehicle to move in a pure electric mode, the driving system can also drive the vehicle in series and parallel modes.

[0053] The modes will be described in detail below.

[0054] When the driving system works in a pure electric driving mode, the power of the power battery 300 is greater than the preset power threshold, and the accelerator pedal opening is less than the preset pedal opening, that is, the battery power is high, the accelerator opening is small, and the vehicle speed is low. When the control step-up transformer 401 is in the closed state, the first driving device 200 is driven in a pure electric mode.

[0055] That is, when the power battery 300 has high power, the accelerator opening is small, and the vehicle speed is low, the driving system adopts a front-drive pure electric mode. That is, the battery power of the power battery 300 is transmitted to the first motor controller 201, and then transmitted to the first motor set, which drives the front wheels to rotate and drives the vehicle to move.

[0056] In addition, when the power battery 300 has high power, the accelerator opening degree is small, and the vehicle speed is high, the driving system can also adopt the front drive pure electric mode, that is, the battery power of the power battery 300 can meet the high-speed driving condition, the power battery 300 can directly deliver the battery power to the first motor controller 201, the first motor controller 201 is delivered to the first motor set, the front wheels are driven to rotate through the first motor set, and the vehicle is driven to move.

[0057] When the driving system works in the parallel driving mode, the power of the power battery 300 is greater than the preset power threshold, the accelerator pedal opening degree is greater than the preset pedal opening degree, and the vehicle speed is greater than the preset vehicle speed threshold, the step-up transformer 401 is in the closed state, and the first driving device 200 drives in the parallel mode, and the second driving device 400 drives in the pure electric mode.

[0058] That is, when the power battery 300 has high power, the accelerator opening degree is large, and the vehicle speed is high, the driving system adopts the mode of combining the front drive parallel and the rear drive pure electric to drive the vehicle to move. It should be noted that the front drive parallel means that the first driving device 200 drives the front wheels in the parallel mode, and then drives the vehicle. In addition, the parallel mode means that the engine 100 and the power battery 300 are output to the wheel end together, and then drive the vehicle. That is, when the accelerator opening degree is large, the vehicle is driven by the two ways of driving the front wheels in the parallel mode and driving the rear wheels in the pure electric mode.

[0059] In addition, the power battery 300 will preferentially allocate the required power to the first driving device 200, and then allocate the power to the second driving device 400. That is, the power of the power battery 300 is preferentially allocated to the first driving device 200, and when the first driving device 200 can complete the parallel mode driving, the remaining power is allocated to the second driving device 400, and the second driving device 400 drives the rear wheels to rotate in the pure electric mode.

[0060] That is, the power of the power battery 300 is mainly used to drive the rear wheels in the pure electric mode of the first driving device 200, and the parallel mode of the first driving device 200 assists to drive the front wheels. In this way, by preferentially allocating the power battery power in the power battery 300 to the second driving device 400, the driving of the vehicle is mainly determined by the driving of the parallel mode in the first driving device 200, and the power input to the step-up transformer 401 is reduced, thereby reducing the device loss of the step-up transformer 401, and achieving the effect of saving fuel of the whole vehicle.

[0061] When the driving system works in the series driving mode, the power of the power battery 300 is greater than the preset power threshold, the step-up transformer 401 is in the open state, the first driving device 200 drives in the series mode, and the second driving device 400 drives in the pure electric mode.

[0062] That is, when the power battery 300 has high power, the accelerator opening degree is large, and the vehicle speed is low, the driving system drives the vehicle in a mode combining front-wheel driving in series and rear-wheel driving by pure electricity. It should be noted that the front-wheel driving in series refers to the first driving device 200 driving the front wheels in series, thereby driving the vehicle. It should be understood that the series mode refers to the engine 100 driving one of the first motor sets to generate electricity, and the generated electricity is transmitted to the power battery 300, and the power battery 300 transmits to the other motor of the first motor set to drive the front wheels. That is, when the accelerator opening degree is large, the vehicle is driven by the combination of the series mode driving the front wheels and the pure electricity mode driving the rear wheels. In addition, the power battery 300 will preferentially allocate the required power to the first driving device 200, and then allocate the power to the second driving device 400. That is, the power of the power battery 300 is preferentially allocated to the first driving device 200, and when the first driving device 200 can complete the series mode driving the front wheels, the remaining power is allocated to the second driving device 400, and the pure electricity mode is used to drive the rear wheels in the second driving device 400.

[0063] That is, the power of the power battery 300 is mainly used to drive the front wheels in series in the first driving device 200, and the pure electricity mode is used to assist driving the rear wheels in the second driving device 400. In this way, by preferentially allocating the power battery power in the power battery 300 to the first driving device 200, the driving of the vehicle is mainly determined by the first driving motor 202 and / or the generator 203 in the first driving device 200, and the power output to the transformer 401 in the second driving device 400 is reduced, thereby reducing the device loss caused by the transformer 401, and achieving the effect of saving fuel for the whole vehicle.

[0064] When the driving system works in the series driving mode, the power of the power battery 300 is less than the preset power threshold, the transformer 401 is in the open state, and the first driving device 200 drives in series.

[0065] That is, when the battery power of the power battery 300 is low and the vehicle is in a low-speed state, regardless of the accelerator opening degree of the vehicle, the working mode of the driving system is the front-wheel driving in series, that is, the first driving device 200 drives the front wheels in series, thereby driving the vehicle. As known from the above, the series mode refers to the engine 100 driving one of the first motor sets to generate electricity, and the generated electricity is transmitted to the first motor controller 201 through the wire harness, and then transmitted to the power battery 300 for charging the power battery 300. After the power battery 300 is charged, the power is provided to the other motor of the first motor set to drive the wheels, thereby driving the vehicle.

[0066] But when the battery power of the power battery 300 is less than the preset power threshold and the vehicle speed is greater than the preset speed threshold, the working mode of the driving system is determined according to the opening degree of the accelerator pedal.

[0067] That is, when the battery power of the power battery 300 is low and the vehicle is in a high speed state, the working mode of the driving system is determined according to the size of the accelerator opening.

[0068] When the accelerator pedal opening is less than the preset pedal opening (i.e., the accelerator opening is small), the driving system adopts a front drive series mode, that is, the first driving device 200 drives the front wheels in series mode, thereby driving the vehicle. The series mode is described above and will not be repeated here.

[0069] When the accelerator pedal opening is greater than the preset pedal opening (i.e., the accelerator opening is large), the driving system adopts an engine 100 direct drive mode to drive the vehicle. It should be noted that the engine 100 direct drive mode means that the engine 100 directly outputs power to the front wheel drive vehicle, and the engine 100 power is not used for power generation.

[0070] The following Table 1 shows the various working modes of the driving system:

[0071]

[0072] Table 1

[0073] It is worth mentioning that the step-up transformer 401 provided in the second driving device 400 can reduce the space occupied by the second motor set 403, so that the rear drive has a larger space environment and can be more reasonably arranged.

[0074] It can be understood that the preset speed threshold, the preset pedal opening and the preset power threshold can be designed differently according to different vehicles, and are not specifically limited in the embodiments of the present application.

[0075] In some embodiments of the present application, the step-up transformer 401 is connected in series between the power battery 300 and the second motor controller 402. When the step-up transformer 401 is in the off state, the second motor set 403 is not driven, and the first motor set is driven independently.

[0076] In the pure electric mode, the present application adopts non-step-up transformer electric drive for driving, that is, adopts front drive pure electric drive, avoids the device loss caused by the step-up transformer 401, achieves the effect of saving electricity and oil for the whole vehicle, and improves the pure electric cruising range. In addition, the step-up transformer 401 improves the motor efficiency, and the electric power passing through the step-up transformer 401 is small and the loss is small, achieving the effect of saving oil for the whole vehicle; and the size of the second motor set 403 can also be reduced.

[0077] Embodiment two

[0078] Embodiment 2 of this application provides a vehicle that includes any of the drive systems described in Embodiment 1. This drive system has any of the technical effects described in Embodiment 1. Through the drive system described in Embodiment 1, costs can be reduced, weight can be reduced, motor efficiency can be improved, motor size can be reduced, and the overall vehicle can achieve energy and fuel saving effects.

[0079] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A drive system characterized by, The application relates to a drive system, comprising: an engine; a first driving device connected with the engine, the first driving device comprising a first motor controller and a first motor set, the first motor controller being connected with the first motor set; a second driving device comprising a step-up transformer, a second motor controller and a second motor set, the step-up transformer being connected with the second motor controller, and the second motor controller being connected with the second motor set; a power battery, the power battery being electrically connected with the first motor controller and the step-up transformer; controlling the step-up transformer to switch between a closed state and an open state according to the working mode of the drive system; when the drive system works in a pure electric driving mode, the power battery has an electric quantity greater than a preset electric quantity threshold, and an accelerator pedal opening degree is less than a preset pedal opening degree, the step-up transformer is controlled to be in the closed state, and the first driving device is driven in the pure electric driving mode.

2. The drive system of claim 1, wherein, when the drive system works in a parallel driving mode, the power battery has an electric quantity greater than a preset electric quantity threshold, an accelerator pedal opening degree is greater than a preset pedal opening degree, and a vehicle speed is greater than a preset vehicle speed threshold, the step-up transformer is in the closed state, the first driving device is driven in the parallel mode, and the second driving device is driven in the pure electric driving mode.

3. The drive system of claim 1, wherein, when the drive system works in a series driving mode, the power battery has an electric quantity greater than a preset electric quantity threshold, an accelerator pedal opening degree is greater than a preset pedal opening degree, and the step-up transformer is in the open state, the first driving device is driven in the series mode, and the second driving device is driven in the pure electric driving mode.

4. The drive system of claim 1, wherein, when the drive system works in the series driving mode, the power battery has an electric quantity less than a preset electric quantity threshold, and the step-up transformer is in the open state, the first driving device is driven in the series mode.

5. The drive system of claim 4, wherein, the power battery is electrically connected with the step-up transformer through a direct-current high-voltage line, and the power battery is electrically connected with the second motor controller through the direct-current high-voltage line.

6. The drive system of claim 1, wherein, the step-up transformer and the second motor controller are electrically connected in parallel to the power battery, when the step-up transformer is in the closed state, the second motor set is driven in the pure electric driving mode alone, or the first motor set is driven in the pure electric driving mode alone, or the first motor set and the second motor set are driven in the pure electric driving mode together.

7. The drive system of claim 1, wherein, the first motor set comprises a first driving motor and a generator, the first motor controller is a double-motor controller, the first motor controller is electrically connected with the first driving motor and the generator, and the generator is electrically connected with the power battery or the generator and the first driving motor are both electrically connected with the power battery.

8. The drive system of claim 1, wherein, the first motor set comprises a first driving motor, the first motor controller is a single-motor controller, the first motor controller is electrically connected with the first driving motor, and the first driving motor is electrically connected with the power battery.

9. The drive system of claim 6 or 7, wherein, the second motor set comprises a second driving motor, the second motor controller is a single-motor controller, and the second motor controller is electrically connected with the second driving motor.

10. The drive system of claim 1, wherein, The step-up transformer is connected in series electrically between the power battery and the second motor controller, and when the step-up transformer is in an off state, the second motor set is not driven, and the first motor set is driven by electricity alone.

11. A vehicle characterized by comprising: The vehicle comprises the drive system according to any one of claims 1 to 10.

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