Electric vehicle, drive system, and control device

Abstract

The embodiment of the present application provides an electric vehicle, a driving system and a control device, the rotation speed of the engine can be controlled according to the comparison result of the preset electric quantity value corresponding to the operation mode of the driving system and the residual electric quantity value of the power battery, so that the heat generated by the engine operation is used for heating the power battery of the electric vehicle or the cabin of the electric vehicle. The electric vehicle, the driving system and the control device provided by the embodiment of the present application can reduce the electric quantity consumption of the electric heater on the power battery or avoid setting the electric heater in the electric vehicle, so that the influence on the endurance of the electric vehicle is avoided, and the driving experience of the electric vehicle is improved.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, and more particularly to an electric vehicle, drive system and control device. Background Technology

[0002] Existing electric vehicles typically incorporate electric heaters, with heat transferred from the heaters to the battery or passenger compartment via a heat transfer system. However, these electric heaters require battery power and consume significant amounts of electricity. Consequently, heating the battery or passenger compartment with an electric heater reduces the vehicle's range and negatively impacts the driving experience.

[0003] Therefore, how to reduce the energy consumption required for heating the cabin or power battery in electric vehicles is a technical problem that needs to be solved in this field. Summary of the Invention

[0004] This application provides an electric vehicle, a drive system, and a control device. The system controls the engine speed based on a comparison between a preset battery charge value corresponding to the drive system's operating mode and the remaining battery charge value. This utilizes the heat generated by the engine to heat the electric vehicle's battery or the passenger compartment. The electric vehicle, drive system, and control device provided in this application can reduce the battery charge consumption by the electric heater or eliminate the need for an electric heater in the electric vehicle, thereby preventing a shortened driving range and improving the driving experience.

[0005] This application provides a drive system for an electric vehicle. The electric vehicle includes a drive system, a power battery, wheels, a heat transfer device, and a passenger compartment. The drive system includes at least one of an engine or a generator, a drive motor, and a control device. The engine drives the generator to generate electricity or drives the electric vehicle. The drive motor receives power from at least one of the generator or the power battery and drives the electric vehicle. The drive system includes at least one operating mode, each corresponding to a preset battery level. The control device controls the engine speed based on a comparison between the preset battery level corresponding to the operating mode of the drive system and the remaining battery level.

[0006] Specifically, the control device compares the preset charge value corresponding to the drive system's operating mode with the remaining charge of the power battery, and controls the engine speed to be greater than a first speed or less than a second speed. The first speed is greater than or equal to the second speed.

[0007] The drive system provided in this embodiment controls the engine speed to generate heat for heating the electric vehicle, which can eliminate the need for an electric heater installed in the electric vehicle or reduce the power consumption of the electric heater on the power battery, thereby improving the range and driving experience of the electric vehicle.

[0008] In one embodiment of the first aspect of this application, the control device controls the engine speed to be greater than a first speed in response to a preset charge value corresponding to the operating mode of the drive system being less than or equal to the remaining charge value of the power battery. The control device also controls the engine speed to be less than a second speed in response to a preset charge value corresponding to the operating mode of the drive system being greater than the remaining charge value of the power battery.

[0009] The control device of the drive system provided in this embodiment can control the engine speed to be higher than a first speed and drive the generator to charge the power battery when the remaining power battery charge is low, and control the engine speed to be lower than a second speed when the remaining power battery charge is high, so that the engine generates heat for heating the electric vehicle. Accordingly, the drive system provided in this embodiment can not only use the engine to charge the power battery, but also use the generator to generate heat for heating the electric vehicle, thereby eliminating the need for an electric heater installed in the electric vehicle or reducing the power consumption of the electric heater on the power battery, thus improving the range and driving experience of the electric vehicle.

[0010] In one embodiment of the first aspect of this application, the control device responds to a preset charge value corresponding to the operating mode of the drive system when the remaining charge value of the power battery is greater than that of the electric vehicle. The control device then controls the engine speed according to the heating command of the electric vehicle. The drive system provided in this embodiment can control the engine speed according to the heating command of the electric vehicle when the power battery charge is high, so that the engine generates heat for heating the electric vehicle. This eliminates the need for an electric heater installed in the electric vehicle or reduces the power consumption of the electric heater on the power battery, thereby improving the range and driving experience of the electric vehicle.

[0011] In one embodiment of the first aspect of this application, in response to the remaining charge value of the power battery being greater than the preset charge value corresponding to the operating mode of the drive system, and receiving a heating command from the electric vehicle, the control device controls the engine speed to be lower than a second speed. The drive system control device provided in this embodiment can control the engine to temporarily not drive the generator to generate electricity or drive the wheels to rotate when the power battery charge is high. However, when a heating command from the electric vehicle is received at this time, the control device can control the engine speed to be lower than the second speed according to the heating command, so that the engine generates heat for heating the electric vehicle. This eliminates the need for an electric heater installed in the electric vehicle or reduces the power consumption of the electric heater on the power battery, thereby improving the electric vehicle's range and driving experience.

[0012] In one embodiment of the first aspect of this application, in response to the remaining charge value of the power battery being greater than the preset charge value corresponding to the operating mode of the drive system, and without receiving a heating command from the electric vehicle, the control device controls the engine speed to zero. The drive system control device provided in this embodiment can control the engine speed to zero when the power battery charge is high, so that the engine temporarily does not drive the generator to generate electricity or drive the wheels to rotate. At this time, the electric vehicle's power battery can provide energy to ensure the normal operation of the electric vehicle, thereby improving the driving experience of the electric vehicle.

[0013] In one embodiment of the first aspect of this application, the control device responds to the fact that the remaining charge value of the power battery is greater than the preset charge value corresponding to the operating mode of the drive system, and receives a heating command from the electric vehicle. The control device controls the engine speed based on at least one of the power battery temperature or the cabin temperature of the electric vehicle, and the ambient temperature of the electric vehicle. The control device of the drive system provided in this embodiment can receive a heating command from the electric vehicle when the power battery charge is high. The control device can then control the engine speed to be lower than a second speed according to the heating command, so that the engine generates heat for heating the electric vehicle. Simultaneously, because the power battery charge is high, the engine may temporarily not drive the generator to generate electricity or drive the wheels to rotate. Therefore, the control device can control the engine speed based on at least one of the power battery temperature or the cabin temperature, and the ambient temperature. When the engine speed can meet the heating requirements of the power battery or the cabin, the power battery of the electric vehicle can provide energy to ensure the normal operation of the electric vehicle, improving the driving experience.

[0014] In one embodiment of the first aspect of this application, the operating modes of the drive system include a first operating mode, a second operating mode, and a third operating mode. The preset battery level corresponding to the first operating mode is less than the preset battery level corresponding to the second operating mode, and the preset battery level corresponding to the second operating mode is less than the preset battery level corresponding to the third operating mode. The drive system provided by this application includes multiple operating modes, enabling the control device to control the engine speed based on a comparison between the preset battery level corresponding to different operating modes and the remaining battery power. This allows for control of the drive system in different operating modes, enriching the application scenarios of the drive system.

[0015] In one embodiment of the first aspect of this application, the electric vehicle is a range-extended electric vehicle. When the drive system of the range-extended electric vehicle operates in a first operating mode, the drive motor receives power from the power battery and drives the vehicle. When the drive system of the range-extended electric vehicle operates in a second operating mode, the engine drives the generator to generate electricity, and the drive motor receives power from the power battery and the generator to drive the wheels. When the drive system of the range-extended electric vehicle operates in a third operating mode, the engine drives the generator to supply power to the drive motor, and the drive motor receives power from the generator to drive the wheels. In the range-extended electric vehicle provided in this embodiment, the control device of the drive system controls the speed of the generator to make the engine run and generate heat for heating, which can eliminate the need for an electric heater installed in the range-extended electric vehicle or reduce the power consumption of the electric heater on the power battery, thereby improving the range and driving experience of the range-extended electric vehicle.

[0016] In one embodiment of the first aspect of this application, the electric vehicle is a hybrid electric vehicle. When the drive system of the hybrid electric vehicle operates in a first operating mode, the drive motor receives power from the power battery and drives the wheels. When the drive system of the hybrid electric vehicle operates in a second operating mode, the drive motor and the engine jointly drive the wheels. When the drive system of the hybrid electric vehicle operates in a third operating mode, the engine drives the wheels. In the hybrid electric vehicle provided in this embodiment, the control device of the drive system controls the speed of the generator to make the engine run and generate heat for heating, which can eliminate the need for an electric heater installed in the hybrid electric vehicle or reduce the power consumption of the electric heater on the power battery, thereby improving the range and driving experience of the hybrid electric vehicle.

[0017] In one embodiment of the first aspect of this application, the electric vehicle further includes a heat transfer device. The heat transfer device can be used to transfer heat generated by the engine to the power battery or the passenger compartment. In response to a heating command from the electric vehicle, the control device controls the heat transfer device to transfer the heat generated by the engine to the power battery or the passenger compartment. The control device of the drive system provided in this embodiment can control the heat transfer device to allow the heat generated by the engine to be used for heating the electric vehicle, thus eliminating the need for an electric heater installed in the electric vehicle or reducing the power consumption of the electric heater on the power battery, thereby improving the range of the hybrid electric vehicle and enhancing the driving experience.

[0018] In one embodiment of the first aspect of this application, the heat transfer device includes an engine thermal circuit, a power battery thermal circuit, a heat exchanger, a radiator, and a fan. The engine thermal circuit is used to transfer heat to the power battery thermal circuit through the heat exchanger or to dissipate heat through the radiator. The fan is used to transfer heat from the radiator to the cabin. A control device responds to a cabin heating command and controls the fan to operate. The heat transfer device transfers heat generated by the engine to the cabin. The control device responds to a power battery heating command and controls the heat exchanger to operate. The heat transfer device transfers heat generated by the engine to the power battery. The electric vehicle drive system provided in this embodiment can control the heat transfer device to transfer heat generated by the engine to the cabin or power battery according to a cabin heating command or a power battery heating command. This eliminates the need for an electric heater in the heat transfer device, thereby reducing the structural complexity of the heat transfer device and also reducing the complexity of the control device controlling the heat transfer device.

[0019] A second aspect of this application provides a control device for a drive system of an electric vehicle. The drive system includes at least one of an engine or a generator, a drive motor, and a control device. The engine drives the generator to generate electricity or drives the electric vehicle. The drive motor receives power from at least one of the generator or a power battery and drives the electric vehicle. The drive system includes at least one operating mode, each corresponding to a preset battery level. The control device controls the engine speed to be greater than a first speed or less than a second speed based on a comparison between the preset battery level corresponding to the operating mode of the drive system and the remaining battery level. The first speed is greater than or equal to the second speed. The control device for the drive system provided in this embodiment can control the engine speed so that the engine generates heat for heating the electric vehicle, thereby eliminating the need for an electric heater installed in the electric vehicle or reducing the power consumption of the electric heater on the power battery, thus improving the range and driving experience of the electric vehicle.

[0020] A third aspect of this application provides an electric vehicle, including a drive system as provided in the first aspect of this application, or a control device as provided in the second aspect of this application. The electric vehicle provided in this embodiment can omit the electric heater installed within the electric vehicle or reduce the power consumption of the electric heater on the power battery, thereby improving the range and driving experience of the electric vehicle. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an electric vehicle;

[0022] Figure 2 This application provides a structural schematic diagram of an electric vehicle;

[0023] Figure 3This application provides a structural schematic diagram of a range-extended electric vehicle.

[0024] Figure 4 A structural schematic diagram of a hybrid electric vehicle provided in this application;

[0025] Figure 5 A schematic diagram of the heat transfer device for the electric vehicle provided in this application;

[0026] Figure 6 Another structural schematic diagram of the heat transfer device for the electric vehicle provided in this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] The connection relationships described in this application refer to direct or indirect connections. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components. For instance, A could be directly connected to C, and C could be directly connected to B, thus achieving a connection between A and B through C. It is also understood that the "A connecting to B" described in this application can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0030] Figure 1 This is a structural schematic diagram of an electric vehicle. Figure 1 As shown, the electric vehicle 1 includes a drive system 10, a power battery 11, wheels 12, a heat transfer device 13, an electric heater 14, and a cabin 15.

[0031] For example, such as Figure 1 As shown in the path corresponding to number ①, the power battery 11 supplies power to the drive system 10, and the drive system 10 drives the wheels 12 to rotate.

[0032] For example, such as Figure 1 As shown in the path corresponding to reference ②, the power battery 11 supplies power to the electric heater 14, which generates heat. The heat conduction device 13 conducts the heat generated by the electric heater 14 to at least one of the power battery 11 or the cabin 15.

[0033] It is understandable that the electric heater 14 of electric vehicle 1 requires power from power battery 11 to generate heat, which will inevitably reduce the power of power battery 11, thereby shortening the range of electric vehicle 1 and affecting the driving experience of electric vehicle 1.

[0034] To address the above technical problems, embodiments of this application provide an electric vehicle, a drive system, and a control device. This device controls the engine speed based on a comparison between a preset charge value corresponding to the drive system's operating mode and the remaining charge value of the power battery. This utilizes the heat generated by the electric vehicle's engine to heat at least one component of the electric vehicle's power battery or passenger compartment. The electric vehicle, drive system, and control device provided in this application can reduce the power consumption of the power battery by the electric heater or eliminate the need for an electric heater in the electric vehicle, thereby avoiding a reduction in the electric vehicle's range and improving the driving experience.

[0035] The technical solutions of this application will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0036] Figure 2 This is a structural schematic diagram of an electric vehicle provided in this application. Figure 2 As shown, the electric vehicle 1 includes a drive system 10, a power battery 11, wheels 12, a heat transfer device 13, and a cabin 15. The power battery 11 supplies power to the drive system 10. The drive system 10 drives the vehicle 12 to rotate. The heat transfer device 13 transfers heat generated by the operation of the engine 102 in the drive system 10 to at least one of the power battery 11 or the cabin 15.

[0037] For example, such as Figure 2 As shown in the path corresponding to number ①, the power battery 11 is used to supply power to the drive system 10, and the drive system 10 drives the wheels 12 to rotate.

[0038] For example, such as Figure 2As shown in the path corresponding to number ②, the heat transfer device 13 transfers the heat generated by the engine operation in the drive system 10 to at least one of the power battery 11 or the cabin 15.

[0039] The drive system 10 of the electric vehicle 1 provided in this application embodiment includes at least one of an engine 102 or a generator 103, a drive motor 101, and a control device 100. The engine 102 is used to drive the generator 103 to generate electricity or to drive the wheels 12 of the electric vehicle 1. The drive motor 101 is used to receive power from at least one of the generator 103 or the power battery 11 of the electric vehicle 1 and to drive the wheels 12 of the electric vehicle 1.

[0040] In this embodiment, the drive system 10 of the electric vehicle 1 includes at least one operating mode, each operating mode corresponding to a preset power value. Specifically, the drive system 10 of the electric vehicle 1 includes a first operating mode, a second operating mode, and a third operating mode.

[0041] In this system, the preset battery level corresponding to the first operating mode is less than the preset battery level corresponding to the second operating mode, and the preset battery level corresponding to the second operating mode is less than the preset battery level corresponding to the third operating mode. For example, the preset battery level corresponding to the first operating mode is A1, the preset battery level corresponding to the second operating mode is A2, and the preset battery level corresponding to the third operating mode is A3. Where A1 < A2 < A3.

[0042] The electric vehicle 1 provided in this application embodiment can be a range-extended electric vehicle or a hybrid electric vehicle.

[0043] In one embodiment, the electric vehicle 1 is a range-extended electric vehicle. The drive system 10 includes a control device 100, a drive motor 101, an engine 102, and a generator 103. The engine 102 drives the generator 103 to generate electricity. In one embodiment, the engine 102 can also drive the wheels 12 of the electric vehicle 1.

[0044] For example, when the drive system 10 operates in the first operating mode, the drive motor 101 receives power from the power battery 11 and drives the wheels 12. When the drive system 10 operates in the second operating mode, the engine 102 drives the generator to supply power to the drive motor 101, and the drive motor 101 receives power from the power battery 11 and the generator and drives the wheels 12. When the drive system 10 operates in the third operating mode, the engine 102 drives the generator to supply power to the drive motor 101, and the drive motor 101 receives power from the generator and drives the wheels 12.

[0045] In one embodiment, the electric vehicle 1 is a hybrid electric vehicle. The drive system 10 includes a control device 100, a drive motor 101, and an engine 102. The engine 102 drives the wheels 12 of the electric vehicle 1.

[0046] For example, when the drive system 10 operates in the first operating mode, the drive motor 101 receives power from the power battery 11 and drives the wheels 12. When the drive system 10 operates in the second operating mode, the drive motor 101 and the engine 102 operate together. The engine 102 and the drive motor 101 together drive the wheels 12. When the drive system 10 operates in the third operating mode, the engine 102 operates and drives the wheels 12.

[0047] In this embodiment, the control device 100 of the drive system 10 controls the rotational speed of the engine 102 based on a comparison between a preset charge value corresponding to the operating mode of the drive system 10 and the remaining charge value of the power battery 11. Specifically, the control device 100 controls the rotational speed of the engine 102 to be greater than a first rotational speed or less than a second rotational speed based on a comparison between the preset charge value corresponding to the operating mode of the drive system 10 and the remaining charge value of the power battery 11. The first rotational speed is greater than or equal to the second rotational speed.

[0048] In this embodiment, the oil-to-electric conversion rate of engine 102 is highest when the engine speed is greater than a first speed. The first speed of engine 102 can be preset, stored in the control device 100, or calculated in real time by the control device 100.

[0049] In one embodiment, in response to the remaining charge value of the power battery 11 being less than or equal to a preset charge value corresponding to the operating mode of the drive system 10, the control device 100 controls the speed of the engine 102 to be greater than a first speed.

[0050] In one embodiment, in response to the remaining charge value of the power battery 11 being greater than the preset charge value corresponding to the operating mode of the drive system 10, the control device 100 controls the speed of the engine 102 to be less than a second speed.

[0051] In one embodiment, in response to the remaining charge value of the power battery 11 being greater than a preset charge value corresponding to the operating mode of the drive system 10, the control device 100 controls the rotational speed of the engine 102 according to the heating command of the electric vehicle 1. Specifically, in response to the remaining charge value of the power battery 11 being greater than the preset charge value corresponding to the operating mode of the drive system 10, the control device 100 controls the rotational speed of the engine 102 to be less than a second rotational speed according to the heating command of the electric vehicle 1.

[0052] In one embodiment, the control device 100 can control the heat conduction device 13 to conduct the heat generated by the engine 102 during operation to the location in the electric vehicle that needs to be heated, according to the heating command of the electric vehicle 1.

[0053] In this embodiment, the locations in the electric vehicle 1 requiring heating include at least one of the power battery 11 or the cabin 15. The heating command includes at least one of the power battery heating command or the cabin heating command.

[0054] Correspondingly, in response to the heating command of the electric vehicle 1, the control device 100 controls the heat conduction device 13 to conduct the heat generated by the operation of the engine 102 to the power battery 11 or the cabin 15.

[0055] In one embodiment, in response to the remaining charge value of the power battery 11 being greater than the preset charge value corresponding to the operating mode of the drive system 10 and receiving a heating command from the electric vehicle 1, the control device 100 controls the speed of the engine 102 to be less than a second speed and greater than zero.

[0056] In one embodiment, when the electric vehicle 1 is a range-extended electric vehicle, the control device 100 controls the engine 102 to rotate at zero when the remaining charge value of the power battery 11 is greater than the preset charge value corresponding to the operating mode of the drive system 10 and no heating command is received from the electric vehicle 1a.

[0057] In one embodiment, the control device 100 can control the rotational speed B of the engine 102 based on the heating demand information Q of the electric vehicle 1. This can be expressed by the formula B = f(Q). The heating demand information Q can be calculated based on one or more factors such as ambient temperature, required temperature, and vehicle speed.

[0058] In one embodiment, the control device 100 responds to the fact that the remaining charge value of the power battery 11 is greater than the preset charge value corresponding to the operating mode of the drive system 10 and receives the heating command from the electric vehicle 1. The control device 100 controls the speed of the engine 102 within a second speed range according to the heating demand information of the electric vehicle 1.

[0059] For example, if the ambient temperature is 10 degrees Celsius and the required temperature for the cabin 15 or the power battery 11 is 25 degrees Celsius, the control device 100 can calculate the heating demand information Q. The control device 100 can determine the rotational speed of the engine 102 based on the heating demand information Q. Accordingly, the engine 102 generates heat during operation, raising its temperature to 30 degrees Celsius. After the heat transfer device 13 transfers the heat generated by the engine 102 to the cabin 15, the temperature provided to the cabin 15 can be 25 degrees Celsius.

[0060] In this embodiment, the control device 100 can control the rotational speed B of the engine 102 according to the ambient temperature T1 of the electric vehicle 1 and the required temperature T2 of the cabin 15 or the power battery 11. This can be expressed by the formula B = f(T1, T2).

[0061] The control device 100 controls the engine 102 to rotate at a speed greater than or equal to a first speed according to the heating command of the electric vehicle 1a, and controls the heat transfer device 13 to transfer the heat generated by the engine 102 during operation to the power battery 11 or the cabin 15.

[0062] In one embodiment, the control device 100 responds to the fact that the remaining charge value of the power battery 11 is greater than the preset charge value corresponding to the operating mode of the drive system 10, and receives a heating command from the electric vehicle 1, and the control device 100 controls the speed of the engine 102 within a second speed range based on at least one of the power battery temperature or the cabin temperature of the electric vehicle 1 and the ambient temperature of the electric vehicle 1.

[0063] For example, if the ambient temperature is 10 degrees Celsius and the required temperature for the cabin 15 or the power battery 11 is 25 degrees Celsius, the control device 100 can calculate the rotational speed of the engine 102. Accordingly, the engine 102 generates heat during operation, raising its temperature to 30 degrees Celsius. After the heat transfer device 13 transfers the heat generated by the engine 102 to the cabin 15, the temperature provided to the cabin 15 can be 25 degrees Celsius.

[0064] It is understood that the electric vehicle 1, drive system 10 and control device 100 provided in the embodiments of this application can omit the electric heater 14 installed in the electric vehicle 1 or reduce the power consumption of the electric heater 14 on the power battery 11, thereby increasing the range of the electric vehicle 1 and improving the driving experience of the electric vehicle 1.

[0065] The electric vehicle 1 provided in this application embodiment can be a range-extended electric vehicle. Figure 3 This is a structural schematic diagram of a range-extended electric vehicle provided in this application. Figure 3 As shown, the range-extended electric vehicle 1a includes a drive system 10, a power battery 11, wheels 12, a heat transfer device 13, and a cabin 15.

[0066] The drive system 10 includes a control device 100, a drive motor 101, an engine 102, and a generator 103. The drive motor 101 receives power from the power battery 11 and drives the wheels 12. The engine 102 drives the generator 103 to generate electricity to supply power to the drive motor 101.

[0067] In one embodiment, the engine 102 can also be used to drive the wheels 12. In another embodiment, the engine 102 can also be used simultaneously to drive the generator 103 to supply power to the power battery 11 and to drive the wheels. In one embodiment, the drive motor 101 can also supply power to the power battery 11.

[0068] The following section, in conjunction with Table 1, discusses... Figure 3 The drive system 10 of the range-extended electric vehicle 1a shown will be described. The drive system 10 of the range-extended electric vehicle 1a has three operating modes: a first operating mode, a second operating mode, and a third operating mode. Specifically, the first operating mode is a pure electric operating mode, the second operating mode is a hybrid mode, and the third operating mode is a fuel-priority mode.

[0069] For example, in pure electric mode, the power battery 11 supplies power to the drive motor 101. The drive motor 101 receives power from the power battery 11 and drives the wheels 12. In hybrid mode, the engine 102 drives the generator 103 to supply power to the drive motor 101. The drive motor 101 receives power from both the generator 103 and the power battery 11 and drives the wheels 12. In fuel-priority mode, the engine 102 drives the generator 103 to supply power to the drive motor 101. The drive motor 101 receives power from the generator 103 and drives the wheels 12.

[0070] Among them, the preset energy value for the pure electric operation mode of the drive system 10 of the range-extended electric vehicle 1a is A1, the preset energy value for the hybrid mode is A2, and the preset energy value for the fuel priority mode is A3. Wherein, A1 < A2 < A3.

[0071] For example, A1 can be a percentage between 20% and 30%. A2 can be a percentage between 50% and 70%. A3 can be a percentage greater than 90%.

[0072] Table 1

[0073]

[0074] As shown in Table 1, the drive system 10 of the range-extended electric vehicle 1a operates in pure electric mode, which corresponds to a preset charge value of A1. When the remaining state of charge (SOC) of the power battery 11 is less than or equal to the preset charge value A1, the generator 103 needs to charge the power battery 11. Therefore, in response to the remaining state of charge of the power battery 11 being less than or equal to the preset charge value A1, the control device 100 controls the engine 102 to operate so that the generator 103 generates electricity. When the remaining state of charge of the power battery 11 is greater than the preset charge value A1, the power battery 11 has a high charge level, and the engine 102 does not need to drive the generator 103 to generate electricity. However, at this time, the range-extended electric vehicle 1a needs to consume the charge of the power battery 11 for heating. Therefore, in response to the remaining state of charge of the power battery 11 being greater than the preset charge value A1, the control device 100 controls the engine 102 to operate to generate heat for heating the range-extended electric vehicle 1a.

[0075] Correspondingly, in response to the remaining charge value of the power battery 11 being less than or equal to a preset charge value A1, the control device 100 controls the engine 102 to rotate at a speed greater than a first speed B1. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A1 and receiving a heating command, the control device 100 controls the engine 102 to rotate at a speed less than a second speed B2 according to the heating command. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A1 and not receiving a heating command, the control device 100 controls the engine 102 to rotate at zero.

[0076] As shown in Table 1, the drive system 10 of the range-extended electric vehicle 1a operates in hybrid mode, corresponding to a preset charge value of A2. When the remaining charge value of the power battery 11 is less than or equal to the preset charge value A2, the generator 103 and the power battery 11 simultaneously supply power to the drive motor 101. Therefore, in response to the remaining charge value of the power battery 11 being less than or equal to the preset charge value A2, the control device 100 controls the engine 102 to operate, causing the generator 103 to generate electricity. When the remaining charge value of the power battery 11 is greater than the preset charge value A2, the power battery 11 has a high charge level, and the engine 102 is not needed to drive the generator 103 to generate electricity. However, at this time, the range-extended electric vehicle 1a needs to consume the charge of the power battery 11 for heating. Therefore, in response to the remaining charge value of the power battery 11 being greater than the preset charge value A2, the control device 100 controls the engine 102 to operate, generating heat for heating the range-extended electric vehicle 1a.

[0077] Correspondingly, in response to the remaining charge value of the power battery 11 being less than or equal to a preset charge value A2, the control device 100 controls the engine 102 to rotate at a speed greater than a first speed B1. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A2 and receiving a heating command, the control device 100 controls the engine 102 to rotate at a speed less than a second speed B2. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A2 and not receiving a heating command, the control device 100 controls the engine 102 to rotate at zero.

[0078] As shown in Table 1, the drive system 10 of the range-extended electric vehicle 1a operates in fuel priority mode, which corresponds to a preset charge value of A3. When the remaining charge value of the power battery 11 is less than or equal to the preset charge value A3, the drive system 10 of the range-extended electric vehicle 1a needs to prioritize using the engine 102 to drive the generator 103 to supply power to the drive motor 101. Therefore, the control device 100 controls the engine 102 to operate in response to the remaining charge value of the power battery 11 being less than or equal to the preset charge value A3. When the remaining charge value of the power battery 11 is greater than the preset charge value A3, the power battery 11 has a high charge level, and the engine 102 is not needed to drive the generator 103 to generate electricity. However, at this time, the range-extended electric vehicle 1a needs to consume the charge of the power battery 11 for heating. Therefore, in response to the remaining charge value of the power battery 11 being greater than the preset charge value A3, the control device 100 can control the engine 102 to operate to generate heat for the heating of the range-extended electric vehicle 1a.

[0079] Correspondingly, in response to the remaining charge value of the power battery 11 being less than or equal to a preset charge value A3, the control device 100 controls the engine 102 to rotate at a speed greater than a first speed B1. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A3 and receiving a heating command, the control device 100 controls the engine 102 to rotate at a speed less than a second speed B2. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A3 and not receiving a heating command, the control device 100 controls the engine 102 to rotate at zero.

[0080] For ease of explanation, the engine 102 and the electric heater 14 generate the same amount of heat. The amount of fuel consumed by the engine 102 is denoted as R1, and the amount of electricity required by the electric heater 14 is denoted as D. The amount of electricity the engine 102 uses to charge the power battery 11 is denoted as D, and the amount of fuel consumed by the engine 102 is denoted as R2. It is understandable that, based on the combined energy efficiency of the engine 102 generating heat through fuel combustion and the electric heater 14 generating heat through electricity, the amount of fuel R1 will be less than the amount of fuel R2.

[0081] The control device 100 of the drive system 10 in the range-extended electric vehicle 1a provided in this embodiment controls the speed of the generator 102 to make the engine 102 run and generate heat for heating. This can eliminate the need for the electric heater 14 installed in the range-extended electric vehicle 1a or reduce the power consumption of the electric heater 14 on the power battery 11, thereby improving the range and driving experience of the range-extended electric vehicle 1a.

[0082] The electric vehicle 1 provided in this application embodiment can be a hybrid electric vehicle. Figure 4 This is a structural schematic diagram of a hybrid electric vehicle provided in this application. Figure 4 As shown, the hybrid electric vehicle 1b includes a drive system 10, a power battery 11, wheels 12, a heat transfer device 13, and a cabin 15.

[0083] The drive system 10 includes a control device 100, a drive motor 101, and an engine 102. The drive motor 101 receives power from the power battery 11 and drives the wheels 12. The engine 102 drives the wheels 12.

[0084] Referring to Table 2 below, for example... Figure 4 The control device 100 explains the control of the engine speed of the hybrid electric vehicle 1b when the drive system 10 is operating in different operating modes.

[0085] The driving system 10 of the hybrid electric vehicle 1b has three operating modes: a first operating mode, a second operating mode, and a third operating mode. Specifically, the first operating mode is a pure electric operating mode, the second operating mode is a hybrid mode, and the third operating mode is a fuel-priority mode.

[0086] For example, in pure electric mode, the power battery 11 supplies power to the drive motor 101, which drives the wheels 12. In hybrid mode, the drive system 10 operates with both the engine 102 and the drive motor 101 driving the wheels 12. In fuel-priority mode, the drive system 10 operates with the engine 102 driving the wheels 12.

[0087] Among them, the preset energy value corresponding to the pure electric operation mode of the drive system 10 of the hybrid electric vehicle 1b is A1, the preset energy value corresponding to the hybrid mode is A2, and the preset energy value corresponding to the fuel priority mode is A3. Wherein, A1 < A2 < A3.

[0088] For example, A1 can be a percentage between 20% and 30%. A2 can be a percentage between 50% and 70%. A3 can be a percentage greater than 90%.

[0089] Table 2

[0090]

[0091] As shown in Table 2, the drive system 10 of the hybrid electric vehicle 1b operates in pure electric mode, corresponding to a preset charge value of A1. When the remaining charge value of the power battery 11 is less than or equal to the preset charge value A1, the power battery 11 has a low charge level, affecting the driving experience of the hybrid electric vehicle 1b. Therefore, in response to the remaining charge value of the power battery 11 being less than or equal to the preset charge value A1, the control device 100 controls the engine 102 to operate and drive the wheels 12. When the remaining charge value of the power battery 11 is greater than the preset charge value A1, the power battery 11 has enough charge to support the operation of the drive motor 101, and the engine 102 is not needed to drive the wheels 12. However, at this time, the hybrid electric vehicle 1b needs to consume the power battery 11 for heating. Therefore, in response to the remaining charge value of the power battery 11 being greater than the preset charge value A1, the control device 100 controls the engine 102 to operate to generate heat for heating the hybrid electric vehicle 1b.

[0092] Correspondingly, in response to the remaining charge value of the power battery 11 being less than or equal to a preset charge value A1, the control device 100 controls the engine 102 to rotate at a speed greater than a first speed B1. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A1 and receiving a heating command, the control device 100 controls the engine 102 to rotate at a speed less than a second speed B2 according to the heating command. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A1 and not receiving a heating command, the control device 100 controls the engine 102 to rotate at zero.

[0093] As shown in Table 2, the drive system 10 of the hybrid electric vehicle 1b operates in hybrid mode, corresponding to a preset charge value of A2. When the remaining charge value of the power battery 11 is less than or equal to the preset charge value A2, the drive system 10 of the hybrid electric vehicle 1b needs to balance the driving experience of the hybrid electric vehicle 1b with the remaining charge value of the power battery 11. Therefore, in response to the remaining charge value of the power battery 11 being less than or equal to the preset charge value A2, the control device 100 controls the engine 102 to run and drive the wheels 12 to rotate, thereby reducing the charge loss of the power battery 11. When the remaining charge value of the power battery 11 is greater than the preset charge value A2, the power battery 11 has a high charge, and the engine 102 is not needed to drive the wheels 12. However, at this time, the hybrid electric vehicle 1b needs to consume the charge of the power battery 11 for heating. Therefore, in order to avoid the power battery 11 depleting rapidly, the control device 100 controls the engine 102 to run and generate heat for heating the hybrid electric vehicle 1b in response to the remaining charge value of the power battery 11 being greater than the preset charge value A2.

[0094] Correspondingly, in response to the remaining charge value of the power battery 11 being less than or equal to a preset charge value A2, the control device 100 controls the engine 102 to rotate at a speed greater than a first speed B1. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A2 and receiving a heating command, the control device 100 controls the engine 102 to rotate at a speed less than a second speed B2. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A2 and not receiving a heating command, the control device 100 controls the engine 102 to rotate at zero.

[0095] As shown in Table 2, the drive system 10 of the hybrid electric vehicle 1b operates in fuel priority mode, which corresponds to a preset charge value of A3. When the remaining charge value of the power battery 11 is less than or equal to the preset charge value A3, the drive system 10 of the hybrid electric vehicle 1b needs to prioritize the use of the engine 102 to ensure that the power battery 11 has a large remaining charge. Therefore, in response to the remaining charge value of the power battery 11 being less than or equal to the preset charge value A3, the control device 100 controls the engine 102 to run and drive the wheels 12, thereby reducing the charge loss of the power battery 11. When the remaining charge value of the power battery 11 is greater than the preset charge value A2, the power battery 11 has a high charge, and the engine 102 is not needed to drive the wheels 12. However, at this time, the hybrid electric vehicle 1b needs to consume the charge of the power battery 11 for heating. Therefore, in order to avoid the power battery 11 depleting rapidly, in response to the remaining charge value of the power battery 11 being greater than the preset charge value A3, the control device 100 controls the engine 102 to run to generate heat for the hybrid electric vehicle 1b.

[0096] Correspondingly, in response to the remaining charge value of the power battery 11 being less than or equal to a preset charge value A3, the control device 100 controls the engine 102 to rotate at a speed greater than a first speed B1. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A3 and receiving a heating command, the control device 100 controls the engine 102 to rotate at a speed less than a second speed B2. In response to the remaining charge value of the power battery 11 being greater than the preset charge value A3 and not receiving a heating command, the control device 100 controls the engine 102 to rotate at zero.

[0097] For ease of explanation, when the engine 102 and the electric heater 14 generate the same amount of heat, the amount of fuel consumed by the engine 102 is denoted as R1, and the amount of electricity required by the electric heater 14 is denoted as D. Simultaneously, when the power battery 11 has a charge of D, the amount of fuel consumed is R2. Therefore, based on the principle that the engine 102 generates heat through fuel combustion and the electric heater 14 generates heat through electrical energy, and common knowledge, R1 < R2.

[0098] Therefore, in the hybrid electric vehicle 1b provided in this embodiment, the control device 100 of the drive system 10 controls the speed of the generator 102 to make the engine 102 run and generate heat for heating. This can eliminate the need for the electric heater 14 installed in the hybrid electric vehicle 1b or reduce the power consumption of the electric heater 14 on the power battery 11, thereby improving the range and driving experience of the hybrid electric vehicle 1b.

[0099] Figure 5 This is a structural schematic diagram of the heat transfer device for the electric vehicle provided in this application. Figure 5 As shown, the heat transfer device 13 includes an engine heat circuit 1301, a power battery heat circuit 1305, a heat exchanger 1303, a radiator 1302, and a fan 1304.

[0100] The engine thermal circuit 1301 is used to conduct heat to the power battery thermal circuit 1305 through the heat exchanger 1303. The engine thermal circuit 1301 is used to dissipate heat through the radiator 1302, and the fan 1304 is used to conduct heat from the radiator 1302 to the cabin 15.

[0101] In this embodiment, the heating command of the electric vehicle 1 includes at least one of a cabin heating command or a power battery heating command. In one embodiment, in response to the cabin heating command, the control device 100 controls the heat exchanger 1303 to operate, and the heat conduction device 13 conducts the heat generated by the engine 102 to the power battery 11. In another embodiment, in response to the power battery heating command, the control device 100 controls the fan 1304 to operate, and the heat conduction device 13 conducts the heat generated by the engine 102 to the cabin 15.

[0102] Figure 6 Another structural schematic diagram of the heat transfer device for the electric vehicle provided in this application. Figure 6 As shown, the heat transfer device 13 includes an engine heat circuit 1301, a power battery heat circuit 1305, a heat exchanger 1303, a radiator 1302, and a fan 1304.

[0103] For example, the engine thermal circuit 1301 includes a first pipe 13011 and a first pressure pump 13012. The first pressure pump 13012 is used to drive the coolant in the first pipe 13011 to absorb the heat generated by the operation of the engine 102. The first pipe 13011 is used to connect the radiator 1302 and the heat exchanger 1303.

[0104] The first pipe 1301 can be sequentially connected to the first pressure pump 13012, the engine 102, and the radiator 1302. The coolant in the first pipe 13011 can conduct heat from the engine 102 to the radiator 1302. When the fan 1304 rotates, it can conduct heat generated by the radiator 1302 to the cabin 15.

[0105] For example, the engine thermal circuit 1301 also includes a high-temperature radiator 201, a high-temperature cooling fan 202, a turbocharger 203, a cooler 204, and a thermostat 205. The coolant in the first pipe 13011 can conduct heat from the engine 102 to the high-temperature radiator 201.

[0106] The first pipeline 13011 can be sequentially connected to the first pressure pump 13012, the engine 102, and the high-temperature radiator 201. When the high-temperature cooling fan 202 rotates, it can conduct the heat generated by the high-temperature radiator 201 to the outside of the electric vehicle 1, thereby reducing the temperature of the engine 102. This application embodiment does not limit the configuration of the turbocharger 203, cooler 204, and thermostat 205; the implementation and principle of the turbocharger 203, cooler 204, and thermostat 205 can refer to existing technologies.

[0107] For example, the power battery thermal circuit 1305 includes a second pipe 13051 and a second pressure pump 13052. The second pressure pump 13052 is used to drive the coolant in the second pipe 13051 to exchange heat with the power battery 11. The second pipe 13051 is used to connect to a heat exchanger 1303.

[0108] The second pipe 13051 can be connected in sequence to the power battery 11, the second pressure pump 13052, the cryogenic exchanger 301, and the heat exchanger 1303. The coolant in the second pipe 13051 can conduct heat from the heat exchanger 1303 to the power battery 11.

[0109] For example, the heat transfer device 13 also includes a cabin cryogenic circuit. The cabin cryogenic circuit includes a third pipe 300, a compressor 302, a condenser 303, a cryogenic radiator 304, and a cryogenic heat exchanger 301. The coolant in the third pipe 300 can transfer heat from the cryogenic radiator 304 to the compressor 302 for compression, and then dissipate heat through the condenser 303, thereby reducing the temperature of the cryogenic radiator 304. When the fan 1304 rotates, it can reduce the temperature of the cabin 15. The coolant in the second pipe 13051 can transfer heat from the power battery 11 to the cryogenic radiator 304, and the coolant in the third pipe 300 can also transfer heat from the cryogenic radiator 304 to the condenser 303, thereby reducing the temperature of the power battery 11.

[0110] For example, the heat transfer device 13 further includes a fourth conduit 400, a fourth pressure pump 405, and a fifth pressure pump 409. The fourth conduit 400 can be sequentially connected to a front motor 401, a generator 402, a cryogenic radiator 403, a cryogenic water tank 404, a power distribution unit 406, and a rear motor 408. The fourth pressure pump 405 and the fifth pressure pump 409 are used to drive the coolant in the fourth conduit 400 to absorb the heat generated by the front motor 401, the generator 402, the cryogenic water tank 404, the power distribution unit 406, and the rear motor 408. The coolant in the fourth conduit 400 dissipates heat through the cryogenic radiator 403, thereby reducing the temperature of the front motor 401, the generator 402, the cryogenic water tank 404, the power distribution unit 406, and the rear motor 408.

[0111] In one embodiment, the coolant in the first pipe 13011, the second pipe 13051, and the fourth pipe 400 may be antifreeze. The coolant in the third pipe 300 may be refrigerant.

[0112] In summary, the electric vehicle 1, drive system 10 and control device 100 provided in this application embodiment control the speed of engine 102 so that engine 102 generates heat for heating electric vehicle 1, which can reduce the power loss of power battery 11, thereby improving the range and driving experience of electric vehicle 1.

[0113] In the foregoing embodiments, the control device in the embodiments of this application may include hardware structures and / or software modules to implement the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is executed in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution. It should be noted that the division of the various modules in the above device is merely a logical functional division; in actual implementation, they can be fully or partially integrated into a single physical entity, or physically separated. Furthermore, these modules can all be implemented by software through processing elements; they can all be implemented in hardware; or some modules can be implemented by processing elements calling software, and some modules can be implemented in hardware. A processing element can be a separately established element, or it can be integrated into a chip in the above device. Alternatively, it can be stored as program code in the memory of the above device, and called and executed by a processing element of the above device. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together, or they can be implemented independently. The processing element mentioned here can be an integrated circuit with signal processing capabilities. In implementation, each step or module of the above method can be completed through integrated logic circuits in the hardware of a processor element or through software instructions. For example, these modules can be one or more integrated circuits configured to implement the above method, such as one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs). Furthermore, when a module is implemented by a processing element calling program code, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor capable of calling program code. Additionally, these modules can be integrated together as a system-on-a-chip (SOC).

[0114] In the above embodiments, the steps performed by the control device can be implemented entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)). .

[0115] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, magnetic disk, or optical disk.

[0116] Those skilled in the art will understand that, for the purpose of illustrating the technical solution of this application, the embodiments of this application are described separately by functional modules, and the circuit devices in each module may partially or completely overlap, which is not intended to limit the scope of protection of this application.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A drive system of an electric vehicle, characterized by, The drive system comprises at least one of an engine for driving a generator or wheels of the electric vehicle, a drive motor for receiving power supply from the generator or a power battery of the electric vehicle and driving the wheels of the electric vehicle, and a control device, the drive system comprising multiple operation modes each corresponding to a preset power value, the control device being configured to: control the engine speed to be greater than a first speed in response to the remaining power value of the power battery being less than or equal to the preset power value corresponding to the operation mode of the drive system; control the engine speed to be less than a second speed in response to the remaining power value of the power battery being greater than the preset power value corresponding to the operation mode of the drive system; wherein the first speed is greater than or equal to the second speed.

2. The drive system of claim 1, wherein, The control device is configured to: control the engine speed according to a heating instruction of the electric vehicle in response to the remaining power value of the power battery being greater than the preset power value corresponding to the operation mode of the drive system.

3. The drive system according to claim 1 or 2, characterized in that, The control device is configured to: control the engine speed to be less than the second speed and greater than zero in response to the remaining power value of the power battery being greater than the preset power value corresponding to the operation mode of the drive system and receiving the heating instruction of the electric vehicle.

4. The drive system of claim 3, wherein, The control device is configured to: control the engine speed according to at least one of a power battery temperature or a cabin temperature of the electric vehicle and an ambient temperature of the electric vehicle in response to the remaining power value of the power battery being greater than the preset power value corresponding to the operation mode of the drive system and receiving the heating instruction of the electric vehicle.

5. The drive system according to claim 1 or 2, characterized by The control device is configured to: control the engine speed to be zero in response to the remaining power value of the power battery being greater than the preset power value corresponding to the operation mode of the drive system and not receiving the heating instruction of the electric vehicle.

6. The drive system of claim 1, 2, or 4, wherein, The operation modes of the drive system comprise a first operation mode, a second operation mode and a third operation mode, the preset power value corresponding to the first operation mode being less than the preset power value corresponding to the second operation mode, and the preset power value corresponding to the second operation mode being less than the preset power value corresponding to the third operation mode.

7. The drive system of claim 1, 2 or 4, the electric vehicle being a range-extended electric vehicle, wherein: when the drive system operates in the first operation mode, the drive motor receives power supply from the power battery and drives the wheels; when the drive system operates in the second operation mode, the engine drives the generator to generate power, and the drive motor receives power supply from the power battery and the generator and drives the wheels; when the drive system operates in the third operation mode, the engine drives the generator to supply power to the drive motor, and the drive motor receives power supply from the generator and drives the wheels.

8. The drive system of claim 1, 2 or 4, the electric vehicle being a hybrid electric vehicle, wherein: when the drive system operates in the first operation mode, the drive motor receives power supply from the power battery and drives the wheels; when the drive system operates in the second operation mode, the engine drives the generator to generate power, and the drive motor receives power supply from the power battery and the generator and drives the wheels; when the drive system operates in the third operation mode, the engine drives the generator to supply power to the drive motor, and the drive motor receives power supply from the generator and drives the wheels. The driving motor drives the wheels when the driving system operates in the first operation mode; The driving motor and the engine jointly drive the wheels when the driving system operates in the second operation mode; The engine drives the wheels when the driving system operates in the third operation mode.

9. The drive system of claim 1, 2, or 4, wherein, The electric vehicle comprises a heat conduction device for conducting heat generated by the engine operation to the power battery or a cabin of the electric vehicle, and the control device is configured to: In response to a heating instruction of the electric vehicle, control the heat conduction device to conduct heat generated by the engine operation to the power battery or the cabin.

10. The drive system of claim 9, wherein, The heat conduction device comprises an engine heat circuit, a power battery heat circuit, a heat exchanger, a radiator and a fan, the engine heat circuit is configured to conduct heat to the power battery heat circuit through the heat exchanger or dissipate heat through the radiator, the fan is configured to conduct heat of the radiator to the cabin, the heating instruction of the electric vehicle comprises a cabin heating instruction and a power battery heating instruction, and the control device is configured to: In response to the cabin heating instruction, control the fan to operate, and the heat conduction device conducts heat generated by the engine operation to the cabin; In response to the power battery heating instruction, control the heat exchanger to operate, and the heat conduction device conducts heat generated by the engine operation to the power battery.

11. A control device for a drive system of an electric vehicle, characterized by, The driving system comprises at least one of an engine or a generator, a driving motor and a control device, the engine is configured to drive the generator to generate electricity or drive wheels of the electric vehicle, the driving motor is configured to receive power supply of at least one of the generator or a power battery of the electric vehicle and drive the wheels of the electric vehicle, the driving system comprises multiple operation modes, each operation mode corresponds to a preset power value, and the control device is configured to: In response to a remaining power value of the power battery being less than or equal to a preset power value corresponding to an operation mode of the driving system, control a rotating speed of the engine to be greater than a first rotating speed; In response to the remaining power value of the power battery being greater than the preset power value corresponding to the operation mode of the driving system, control the rotating speed of the engine to be less than a second rotating speed; The first rotating speed is greater than or equal to the second rotating speed.

12. An electric vehicle characterized by comprising: The driving system of any one of claims 1-10, or the control device of claim 11. The driving system of any one of claims 1-10, or the control device of claim 11.

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