Method and device for controlling range extender in driving state and vehicle

Abstract

The application relates to a range extender control method and device in a driving state and a vehicle. The range extender control method in the driving state comprises the following steps: when it is determined that the vehicle is in an uphill driving state, acquiring an uphill angle value of the vehicle, and the current states of a brake pedal and a gear pedal; determining target power and target speed of a range extender of the vehicle according to the uphill angle value of the vehicle, the current states of the brake pedal and the gear pedal, and a preset power-speed corresponding relation table; and controlling the range extender to drive a motor of the vehicle at the target speed and the target power. The range extender control method in the driving state can reduce battery power feeding caused by long uphill driving, reduce the number of charging and discharging conversion, increase the charging and discharging efficiency, and thus improve the fuel conversion efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, in particular to a range extender control method and device in a driving state and a vehicle. BACKGROUND

[0002] With the development of the automobile industry, due to the increasing depletion of non-renewable energy and the increasing environmental pollution, electric vehicles have received more and more attention. The endurance mileage of electric vehicles has also become the focus of attention. The range-extended electric vehicle can turn on the vehicle auxiliary power supply device to provide power for the power system when the vehicle-mounted rechargeable energy storage system cannot meet the endurance mileage requirement, thereby extending the endurance mileage.

[0003] However, in the working condition of large power consumption such as uphill, in order to maintain the current vehicle speed, the instantaneous power P2 of the motor of the vehicle increases, which will consume a large amount of battery pack power, causing the battery remaining power value to be quickly fed and the number of charging and discharging times to be increased, thereby reducing the charging and discharging efficiency and the fuel conversion efficiency. Therefore, how to solve the problem of energy loss of the battery pack during charging and discharging due to the increase of the battery remaining power value and the number of charging and discharging times, thereby reducing the fuel conversion efficiency, is a problem that needs to be solved by those skilled in the art. SUMMARY

[0004] Therefore, a range extender control method and device in a driving state and a vehicle are provided to solve the problem of energy loss of the battery pack during charging and discharging due to the increase of the battery remaining power value and the number of charging and discharging times, thereby reducing the fuel conversion efficiency.

[0005] In one aspect, a range extender control method in a driving state is provided, which includes: when it is determined that a vehicle is in a driving state, obtaining a vehicle uphill angle value, a current state of a brake pedal and a gear lever pedal; determining a target power and a target speed of a range extender of the vehicle according to the vehicle uphill angle value, the current state of the brake pedal and the gear lever pedal, and a preset power-speed corresponding relationship table; and controlling the range extender to drive a motor of the vehicle at the target speed and the target power.

[0006] In one embodiment, the determination of the target power and the target speed of the range extender of the vehicle according to the vehicle uphill angle value, the current state of the brake pedal and the gear lever pedal, and the preset power-speed corresponding relationship table includes: when the brake pedal is in an unpressed state and the gear lever pedal is in a pressed state, obtaining a current driving speed of the vehicle, and determining the target power of the range extender of the vehicle according to the vehicle uphill angle value and the driving speed; and determining the target speed of the range extender according to the target power and the power-speed corresponding relationship table.

[0007] In one of the embodiments, the target power and target speed of the range extender of the vehicle are determined according to the uphill angle value of the vehicle, the current states of the brake pedal and the gear pedal, and the preset power-speed corresponding table, including: when the brake pedal is in the depressed state and the gear pedal is in the non-depressed state, gradually reducing the target speed of the range extender, and allowing the target speed to be converted within a preset time.

[0008] In one of the embodiments, the target power of the range extender of the vehicle is determined according to the uphill angle value of the vehicle and the driving speed, including: calculating the reference power of the range extender by the formula P4=(mgv+mgvsinα) / k; determining the target power according to the reference power; wherein P4 is the reference power of the range extender, k is a calibration coefficient, m is the mass of the vehicle, g is the acceleration of gravity, v is the current driving speed of the vehicle, and α is the uphill angle value of the vehicle.

[0009] In one of the embodiments, the target power is determined according to the reference power, including: obtaining the current residual power value of the battery pack of the vehicle; when the residual power value is less than a preset power value, matching the reference power with the power-speed corresponding table, and selecting a power greater than the reference power from the power-speed corresponding table as the target power.

[0010] In one of the embodiments, the power greater than the reference power is selected from the power-speed corresponding table as the target power, including: selecting a power closest to the reference power from the powers greater than the reference power in the power-speed corresponding table as the target power.

[0011] In one of the embodiments, the range extender is controlled to drive the motor of the vehicle at the target speed and the target power, further including: starting timing when it is determined that the vehicle meets a preset timing condition; the preset timing condition is that the vehicle is in a driving state on a bumpy road, and the target power and the target speed are different from the current power and the current speed of the range extender; after the target timing duration is reached, the range extender is controlled to drive the motor of the vehicle at the target speed and the target power.

[0012] In one of the embodiments, the target power is determined according to the reference power, further including: when receiving an instruction to start the power saving mode, matching the reference power with the power-speed corresponding table, and selecting a power closest to the reference power from the powers less than the reference power in the power-speed corresponding table as the target power.

[0013] In another aspect, a range extender control device in a driving state is provided, which comprises an acquisition module, a determination module and a control module. When it is determined that a vehicle is in a driving state, the acquisition module is configured to acquire a vehicle uphill angle value, current states of a brake pedal and a gear pedal. The determination module is configured to determine a target power and a target speed of a range extender of the vehicle according to the vehicle uphill angle value, the current states of the brake pedal and the gear pedal, and a preset power-speed corresponding relationship table. The control module is configured to control the range extender to drive a motor of the vehicle at the target speed and the target power.

[0014] In another aspect, a vehicle is provided, which comprises the range extender control device in a driving state described above.

[0015] The range extender control method, device and vehicle described above, when it is determined that a vehicle is in a driving state, acquire a vehicle uphill angle value, current states of a brake pedal and a gear pedal, determine a target power and a target speed of a range extender of the vehicle according to the vehicle uphill angle value, the current states of the brake pedal and the gear pedal, and a preset power-speed corresponding relationship table, and control the range extender to drive a motor of the vehicle at the target speed and the target power, thereby solving the problem that energy loss occurs when a battery pack charges and discharges due to the increase of the battery residual capacity value, power feeding and charge-discharge times, thereby reducing fuel conversion efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A working principle diagram of the range extender disclosed in the embodiments of the present application;

[0017] Figure 2 A flowchart of a range extender control method in a driving state disclosed in the embodiments of the present application;

[0018] Figure 3 A flowchart of step S20 in the range extender control method in a driving state shown in FIG. 2; Figure 2 A flowchart of step S22 in the range extender control method in a driving state shown in FIG. 2;

[0019] Figure 4 A flowchart of step S30 in the range extender control method in a driving state shown in FIG. 2; Figure 3 A flowchart of step S30 in the range extender control method in a driving state shown in FIG. 2;

[0020] Figure 5 A flowchart of step S30 in the range extender control method in a driving state shown in FIG. 2; Figure 2 A flowchart of step S30 in the range extender control method in a driving state shown in FIG. 2;

[0021] Figure 6A structure schematic diagram of a range extender control device in a driving state disclosed by an embodiment of the present application is shown in the figure.

[0022] Figure 7 A structure schematic diagram of a vehicle disclosed by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0024] It should be noted that the diagrams provided in the embodiments only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the diagrams, not the number, shape and size of the components when actually implemented. The shape, number and proportion of each component when actually implemented can be arbitrarily changed, and the component layout pattern can also be more complex. The structure, proportion, size, etc. shown in the diagrams attached to the present application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and not to limit the defined conditions under which the present application can be implemented, so it does not have substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, not to limit the scope in which the present application can be implemented, and the change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope in which the present application can be implemented.

[0025] With the development of the automobile industry, due to the increasing depletion of non-renewable energy and the increasing environmental pollution, electric vehicles have received more and more attention. The cruising range of electric vehicles has also become the focus of attention. The range-extended electric vehicle can open the on-board auxiliary power supply device to provide power for the power system when the on-board rechargeable energy storage system cannot meet the cruising range requirement, thereby extending the cruising range. However, in the working condition of uphill and the like where the power consumption is large, in order to maintain the current vehicle speed, the instantaneous power P2 output by the motor of the vehicle is increased, which will consume a large amount of battery pack power, resulting in that the battery residual power value is fed back too much, thereby reducing the fuel conversion efficiency. Therefore, how to solve the problem that energy loss occurs when the battery pack is charged and discharged due to the battery residual power value feedback and the increase of the charging and discharging times, thereby reducing the fuel conversion efficiency is a problem that those skilled in the art need to solve.

[0026] Based on this, the present application hopes to provide a solution to the above technical problems, which can solve the problem of reduced fuel conversion efficiency due to energy loss during battery charging and discharging caused by battery remaining power value feeding and increasing charging and discharging times. The detailed content will be described in the subsequent embodiments.

[0027] The present application provides a range extender control method in a driving state, a range extender control device in a driving state, and a vehicle with the range extender control device.

[0028] Please refer to Figure 1 , which is the working principle diagram of the range extender disclosed in the embodiments of the present application. The range extender power generation driving motor has two paths, one of which S1 is through battery charging and discharging to the motor, and the other S2 is the range extender power generation directly driving the motor. During driving, the more the range extender power generation directly drives the motor, the higher the fuel conversion efficiency.

[0029] Please refer to Figure 2 , which is a flowchart of a range extender control method in a driving state disclosed in the embodiments of the present application. In the present application, the flow of the range extender control method in the driving state at least includes the following steps.

[0030] S10, when it is determined that the vehicle is in a driving state, obtaining the vehicle uphill angle value, the current state of the brake pedal and the gear lever pedal.

[0031] S20, determining the target power and target speed of the range extender of the vehicle according to the vehicle uphill angle value, the current state of the brake pedal and the gear lever pedal, and the preset power and speed corresponding relationship table.

[0032] S30, controlling the range extender to drive the motor of the vehicle at the target speed and the target power.

[0033] Please refer to Figure 3 , in the present application, the step S20 at least includes the following steps.

[0034] S21, when the brake pedal is in the depressed state and the gear lever pedal is in the non-depressed state, gradually reducing the target speed of the range extender, and allowing the target speed to be converted within a preset time.

[0035] In the embodiment of the present application, specifically, when the brake pedal is in the depressed state and the electric pedal is in the non-depressed state, since the total power P3 of the vehicle is greater than the difference between the output instantaneous power P2 of the range-extender vehicle motor and the instantaneous power F1 of the gravity component when the brake pedal is in the depressed state, more electric quantity is not needed, so the target speed of the range-extender is gradually reduced, and the target speed is allowed to be converted within a preset time, wherein the preset time can be 1s.

[0036] In the embodiment of the present application, when the brake pedal is in the depressed state and the electric pedal is in the non-depressed state, the total power P3 of the vehicle is close to (i.e. approximately equal to) the difference between the output instantaneous power P2 of the range-extender vehicle motor and the instantaneous power F1 of the gravity component; therefore, at this time, a reasonable range-extender output power and range-extender speed control mode is adopted, which can avoid energy loss caused by battery pack charging and discharging, so as to achieve the purpose of increasing fuel conversion efficiency.

[0037] S22, when the brake pedal is in the non-depressed state and the electric pedal is in the depressed state, determining the target power and target speed of the range-extender of the vehicle according to the vehicle uphill angle value, the current state of the brake pedal and the electric pedal, and the preset power and speed corresponding relationship table.

[0038] Please refer to Figure 4 In the embodiment of the present application, the step S22 can include the following sub-steps.

[0039] S221, when the brake pedal is in the non-depressed state and the electric pedal is in the depressed state, obtaining the current driving speed of the vehicle, and determining the target power of the range-extender of the vehicle according to the vehicle uphill angle value and the driving speed.

[0040] In the embodiment of the present application, specifically, the gravity traction force F1 of the vehicle when descending is calculated by formula (1):

[0041] F1=mgsinα formula (1)

[0042] Wherein, m is the mass of the vehicle, g is the acceleration of gravity, v is the current driving speed of the vehicle, and a is the vehicle uphill angle value, which can be greater than or equal to 0, and the instantaneous power of the gravity component of the vehicle is P1, which is calculated by formula (2):

[0043] P1=mgvsinα formula (2)

[0044] The output instantaneous power of the vehicle motor is P2, which can be directly read, the total power of the vehicle is P3, which is calculated by formula (3):

[0045] P3 = P2 - P1 Equation (3)

[0046] According to Equation (2) and Equation (3), the following is obtained:

[0047] P3 = P2 - mgv sin a Equation (4)

[0048] According to Equation (4), the following is obtained:

[0049] P2 = P3 + mgv sin a Equation (5)

[0050] The reference power of the range extender is P4, and since the output power of the range extender to the motor is lossy, P2 = kP4, where k is a calibration coefficient, and k can be calibrated according to the motor efficiency and the range extender power generation efficiency. According to P3 = mgv and Equation (5), the reference power of the range extender is calculated as follows:

[0051] P4 = (mgv + mgv sin a) / k Equation (6)

[0052] The target power is further determined according to the reference power. In the embodiment of the application, a current residual power value of a battery pack of the vehicle is obtained, and when the residual power value is less than a preset power value, the reference power is matched with the power-speed corresponding relationship table, and a power greater than the reference power is selected from the power-speed corresponding relationship table as the target power. Among the powers greater than the reference power in the power-speed corresponding relationship table, the power closest to the reference power is selected as the target power.

[0053] In the embodiment of the application, when the instruction to start the power saving mode is received, the reference power is matched with the power-speed corresponding relationship table, and the power closest to the reference power is selected from the powers less than the reference power in the power-speed corresponding relationship table as the target power.

[0054] S222, determining the target speed of the range extender according to the target power and the power-speed corresponding relationship table.

[0055] In the embodiment of the present application, specifically, the range extender can match the power required by the motor according to the actual speed, but the output instantaneous power P2 of the motor of the vehicle is a variable value, and the internal combustion engine must be at a specific speed to achieve the best thermal efficiency, which can cause the efficiency of the range extender to decrease, so the range extender is calibrated with multiple working gears of the best thermal efficiency, and a power-speed correspondence table is established, wherein each working gear of the range extender corresponds to a speed interval. Taking the number of working gears of the best thermal efficiency as N for example, when the working gear of the range extender is 1, the speed of the range extender of the vehicle is 2000 revolutions, and the corresponding power is A; when the working gear of the range extender is 2, the speed of the range extender of the vehicle is 2300 revolutions, and the corresponding power is B; and when the working gear of the range extender is N, the speed of the range extender of the vehicle is 5000 revolutions, and the corresponding power is Z. Since the speed and power of the internal combustion engine are not in a linear relationship, the appropriate best gear number D can be obtained by table lookup, and the range of D can be 0-N, and each working gear of the range extender corresponds to a speed interval.

[0056] Please refer to Figure 5 In the embodiment of the present application, the step S30 can include the following sub-steps.

[0057] S31, start timing when it is determined that the vehicle meets the pre-designed time condition.

[0058] In the embodiment of the present application, specifically, the pre-designed time condition is that the vehicle is in a bumpy road driving state, and the target power and the target speed are different from the current power and the current speed of the range extender.

[0059] S32, after the target timing duration arrives, control the range extender to drive the motor of the vehicle at the target speed and the target power.

[0060] In summary, in the range extender control method of the present application, when it is determined that the vehicle is in a driving state, the target power and the target speed of the range extender of the vehicle are determined according to the uphill angle value of the vehicle, the current state of the brake pedal and the gear pedal, and the pre-set power-speed correspondence table, the motor of the vehicle is driven by the range extender at the target speed and the target power, thereby solving the problem that energy loss occurs when the battery pack charges and discharges due to the increase of the battery residual capacity value and the number of charge and discharge times, thereby reducing the fuel conversion efficiency.

[0061] It should be understood that, although Figures 2 to 5The steps in the flowchart are shown in sequence according to the arrows, but the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, the steps are not strictly limited in sequence, and the steps can be executed in other sequences. Moreover, Figures 2 to 5 At least one of the steps in the flowchart can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of the sub-steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least one part of other steps or sub-steps or stages of other steps.

[0062] Please refer to Figure 6 , which is a structural schematic diagram of a range extender control device in a driving state. The present application provides a range extender control device 100 in a driving state, which can at least include an acquisition module 110, a determination module 120 and a control module 130. Wherein, the acquisition module 110 is connected with the determination module 120, and the determination module 120 is connected with the control module 130.

[0063] When it is determined that the vehicle is in a driving state, the acquisition module 110 is configured to acquire the uphill angle value of the vehicle, the current state of the brake pedal and the gear pedal.

[0064] The determination module 120 is configured to determine the target power and target speed of the range extender of the vehicle according to the uphill angle value of the vehicle, the current state of the brake pedal and the gear pedal, and a preset power-speed corresponding relationship table. Wherein, when the brake pedal is in a depressed state and the gear pedal is in an undepressed state, since the total power P3 of the vehicle is greater than the difference between the instantaneous power P2 of the range extender and the instantaneous power P1 of the gravity component when the brake pedal is in a depressed state, more electric quantity is not needed, so the target speed of the range extender is gradually reduced, and the target speed is allowed to be converted within a preset time, wherein the preset time can be 1s.

[0065] When the brake pedal is in an undepressed state and the gear pedal is in a depressed state, the current driving speed of the vehicle is acquired, and the target power of the range extender of the vehicle is determined according to the uphill angle value of the vehicle and the driving speed. Specifically, the gravity traction force F1 of the vehicle when descending is calculated by formula (1):

[0066] F1=mgsinα formula (1)

[0067] Wherein, m is the mass of the vehicle, g is the acceleration of gravity, v is the current driving speed of the vehicle, and a is the uphill angle value of the vehicle, which can be greater than or equal to 0, the instantaneous power of the gravity component of the vehicle is P1, which is calculated by formula (2):

[0068] P1 = mgv sin a formula (2)

[0069] The output instantaneous power of the vehicle motor is P2, which can be directly read, the total power of the vehicle is P3, which is calculated by formula (3):

[0070] P3 = P2 - P1 formula (3)

[0071] According to formula (2) and formula (3), the following is obtained:

[0072] P3 = P2 - mgv sin a formula (4)

[0073] According to formula (4), P2 is calculated as:

[0074] P2 = P3 + mgv sin a formula (5)

[0075] The reference power of the range extender is P4, since the output power of the range extender to the motor is lossy, P2 = kP4, wherein k is a calibration coefficient, which can be calibrated according to the motor efficiency and the range extender power generation efficiency. According to P3 = mgv and formula (5), the reference power of the range extender is calculated as:

[0076] P4 = (mgv + mgv sin a) / k formula (6)

[0077] The target power is further determined according to the reference power. In the embodiment of the application, the current residual capacity value of the battery pack of the vehicle is obtained, when the residual capacity value is less than a preset capacity value, the reference power is matched with the power-speed corresponding relationship table, and a power greater than the reference power is selected from the power-speed corresponding relationship table as the target power. Among the powers greater than the reference power in the power-speed corresponding relationship table, the power closest to the reference power is selected as the target power.

[0078] In the embodiment of the application, when the instruction to start the power saving mode is received, the reference power is matched with the power-speed corresponding relationship table, and the power closest to the reference power is selected from the power less than the reference power in the power-speed corresponding relationship table as the target power.

[0079] According to the target power and the power-speed correspondence table, a target speed of the range extender is determined. In the embodiment of the application, the range extender can match the power required by the motor according to the actual speed, but the output instantaneous power P2 of the vehicle motor is a variable value, and the internal combustion engine must be at a specific speed to achieve the best thermal efficiency, which can cause the efficiency of the range extender to decrease. Therefore, the range extender is calibrated with multiple working gears of the best thermal efficiency, and a power-speed correspondence table is established, wherein each working gear of the range extender corresponds to a speed interval. Taking the number of working gears of the best thermal efficiency as N as an example, when the working gear of the range extender is 1, the speed of the range extender of the vehicle is 2000 revolutions, and the corresponding power is A; when the working gear of the range extender is 2, the speed of the range extender of the vehicle is 2300 revolutions, and the corresponding power is B; and when the working gear of the range extender is N, the speed of the range extender of the vehicle is 5000 revolutions, and the corresponding power is Z. Since the speed and power of the internal combustion engine are not in a linear relationship, a table lookup method can be used to obtain a proper number D of the best gear, and the range of D can be 0-N, and each working gear of the range extender corresponds to a speed interval.

[0080] The control module 130 is configured to control the range extender to drive the motor of the vehicle at the target speed and the target power. In the embodiment of the application, when it is determined that the vehicle meets a preset time condition, timing starts, the preset time condition is that the vehicle is in a rough road driving state, and the target power and the target speed are different from the current power and the current speed of the range extender. After the target timing duration is reached, the range extender is controlled to drive the motor of the vehicle at the target speed and the target power.

[0081] In summary, in the range extender control device in the driving state of the application, when it is determined that the vehicle is in the driving state, the vehicle uphill angle value, the current state of the brake pedal and the gear lever pedal are obtained by the acquisition module 110, the target power and the target speed of the range extender of the vehicle are determined by the determination module 120 according to the vehicle uphill angle value, the current state of the brake pedal and the gear lever pedal and the preset power-speed correspondence table, and the control module 130 controls the range extender to drive the motor of the vehicle at the target speed and the target power, thereby solving the problem that energy loss occurs when the battery pack charges and discharges, thereby reducing fuel conversion efficiency due to the increase of the battery residual capacity value and the number of charge and discharge times.

[0082] Referring to Figure 7 which is a structural schematic diagram of a vehicle according to an embodiment of the application. The application also provides a vehicle 10, which comprises Figure 6 the range extender control device 100 in the driving state in the illustrated embodiment.

[0083] Any combination of the technical features in the above embodiments can be made. For the sake of brevity, the foregoing description has not described all possible combinations of the technical features in the above embodiments, however, as long as the combination of the technical features does not contradict, it should be considered within the scope of the present disclosure.

[0084] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A method of controlling a range extender in a running state, characterized by, The method comprises the steps of: When it is determined that the vehicle is in a driving state, obtaining the uphill angle value of the vehicle, the current state of the brake pedal and the gear pedal; According to the uphill angle value of the vehicle, the current state of the brake pedal and the gear pedal, and a preset power-speed corresponding table, determining the target power and target speed of the range extender of the vehicle; Controlling the range extender to drive the motor of the vehicle at the target speed and the target power; According to the uphill angle value of the vehicle, the current state of the brake pedal and the gear pedal, and a preset power-speed corresponding table, determining the target power and target speed of the range extender of the vehicle, comprising: when the brake pedal is in an unpressed state and the gear pedal is in a pressed state, obtaining the current driving speed of the vehicle, and determining the reference power of the range extender of the vehicle according to the uphill angle value of the vehicle and the driving speed, and determining the target power according to the reference power; determining the target speed of the range extender according to the target power and the power-speed corresponding table; According to the reference power to determine the target power, comprising: obtaining the current residual capacity value of the battery pack of the vehicle; when the residual capacity value is less than a preset capacity value, matching the reference power with the power-speed corresponding table, and selecting the power closest to the reference power from the power greater than the reference power in the power-speed corresponding table as the target power.

2. The range extender control method in a traveling state according to claim 1, characterized by, According to the uphill angle value of the vehicle, the current state of the brake pedal and the gear pedal, and a preset power-speed corresponding table, determining the target power and target speed of the range extender of the vehicle, comprising: When the brake pedal is in a pressed state and the gear pedal is in an unpressed state, gradually reducing the target speed of the range extender, and allowing the target speed to be converted within a preset time.

3. The method of claim 1, wherein The calculation formula of the reference power is P4=(mgv+mgvsinα) / k; Wherein, P4 is the reference power of the range extender, k is the calibration coefficient, m is the mass of the vehicle, g is the acceleration of gravity, v is the current driving speed of the vehicle, and α is the uphill angle value of the vehicle.

4. The method of claim 1, wherein The control of the range extender to drive the motor of the vehicle at the target speed and the target power further comprises: When it is determined that the vehicle meets a preset timing condition, start timing; the preset timing condition is that the vehicle is in a driving state on a bumpy road, and the target power and the target speed are different from the current power and the current speed of the range extender; After the target timing duration is reached, controlling the range extender to drive the motor of the vehicle at the target speed and the target power.

5. The method of claim 1, wherein According to the reference power to determine the target power, further comprising: When receiving an instruction to start the power saving mode, matching the reference power with the power-speed corresponding table, and selecting the power closest to the reference power from the power less than the reference power in the power-speed corresponding table as the target power.

6. An extended range device control device in a running state, characterized by, The range extender control device in the driving state comprises an acquisition module, a determination module and a control module, wherein the acquisition module is configured to acquire a vehicle uphill angle value, a current state of a brake pedal and a gear pedal when it is determined that the vehicle is in a driving state; The determination module is configured to determine a target power and a target speed of a range extender of the vehicle according to the vehicle uphill angle value, the current state of the brake pedal and the gear pedal and a preset power-speed corresponding relation table; The control module is configured to control the range extender to drive a motor of the vehicle at the target speed and the target power; The determination module is specifically configured to acquire a current driving speed of the vehicle when the brake pedal is in an unpressed state and the gear pedal is in a pressed state, determine a reference power of the range extender of the vehicle according to the vehicle uphill angle value and the driving speed, determine a target power according to the reference power, determine a target speed of the range extender according to the target power and the power-speed corresponding relation table; The determination of the target power according to the reference power comprises: acquiring a current residual power value of a battery pack of the vehicle; when the residual power value is less than a preset power value, matching the reference power with the power-speed corresponding relation table, and selecting a power closest to the reference power from powers greater than the reference power in the power-speed corresponding relation table as the target power.

7. A vehicle characterized by comprising: The vehicle comprises the range extender control device in the driving state according to claim 6.

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