Range extender control method, device, apparatus, storage medium and program product

Abstract

The application relates to a range extender control method, device, equipment, storage medium and program product, and relates to the technical field of new energy vehicles. The method is executed by a hybrid power control system of a range extender vehicle, and the method comprises the following steps: obtaining the state of charge and the required power of the range extender vehicle; starting the range extender when the required power is less than the discharge power of the battery of the range extender vehicle and the state of charge of the range extender vehicle meets a first state of charge; stopping the range extender when the required power is less than the discharge power of the battery of the range extender vehicle and the state of charge of the range extender vehicle meets a second state of charge; the second state of charge is greater than the first state of charge; obtaining an engine starting threshold when the required power is greater than the discharge power of the battery of the range extender vehicle; starting the range extender when the required power is greater than the engine starting threshold; and stopping the range extender when the required power is less than the engine starting threshold.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of new energy vehicles, in particular to a range extender control method, device, equipment, storage medium and program product. BACKGROUND

[0002] With the rapid development of the new energy vehicle industry, range-extended electric vehicles have attracted widespread attention. The range extender in the range-extended electric vehicle can start the electric vehicle when the state of charge of the high-voltage battery is insufficient or the available power cannot meet the demand power, and charge the battery or supply power to the vehicle. Therefore, the control method for the range extender is particularly important.

[0003] In related technologies, during the driving of the range-extended vehicle, the engine management system of the vehicle can monitor the state of charge of the vehicle battery and the demand power of the vehicle in real time. When the state of charge is detected to be lower than a preset minimum state of charge, or the current available power is insufficient to meet the demand power of the vehicle, the engine management system of the vehicle enables the range extender, generates power through the range extender, and charges the battery or directly supplies power to the electric motor. Conversely, if the state of charge of the vehicle battery rises to a higher state of charge threshold, and the demand power of the vehicle returns to normal, the engine management system of the vehicle closes the range extender.

[0004] However, the control method for the range extender of the range-extended electric vehicle in the above-mentioned related technology considers only a single factor, resulting in low control accuracy of the range extender and affecting the control effect of the range extender. SUMMARY

[0005] Embodiments of the present application provide a range extender control method, device, equipment, storage medium and program product, which can improve the accuracy of the hybrid power control system of the range-extended vehicle in controlling the range extender and improve the control effect of the range extender. The technical solution is as follows:

[0006] On the one hand, a range extender control method is provided, which is executed by a hybrid power control system of a range-extended vehicle, and the method comprises:

[0007] obtaining the state of charge and the demand power of the range-extended vehicle; the demand power is the driving power of the range-extended vehicle plus the accessory power of the range-extended vehicle;

[0008] starting the range extender when the demand power is less than the battery discharge power of the range-extended vehicle, and the state of charge of the range-extended vehicle meets a first state of charge;

[0009] stopping the range extender when the demand power is less than the battery discharge power of the range-extended vehicle, and the state of charge of the range-extended vehicle meets a second state of charge; the second state of charge is greater than the first state of charge.

[0010] obtain an engine start threshold value when the required power is greater than the discharge power of the battery of the extended-range vehicle;

[0011] start the range extender when the required power is greater than the engine start threshold value.

[0012] stop the range extender when the required power is less than the engine start threshold value.

[0013] In another aspect, a range extender control device is provided, which comprises:

[0014] an information obtaining module, configured to obtain a state of charge of the extended-range vehicle and a required power; the required power is a driving power of the extended-range vehicle plus an accessory power of the extended-range vehicle;

[0015] a first starting module, configured to start a range extender when the required power is less than a discharge power of a battery of the extended-range vehicle and the state of charge of the extended-range vehicle meets a first state of charge;

[0016] a first stopping module, configured to stop the range extender when the required power is less than the discharge power of the battery of the extended-range vehicle and the state of charge of the extended-range vehicle meets a second state of charge; the second state of charge is greater than the first state of charge;

[0017] an engine start threshold value obtaining module, configured to obtain an engine start threshold value when the required power is greater than the discharge power of the battery of the extended-range vehicle;

[0018] a second starting module, configured to start the range extender when the required power is greater than the engine start threshold value.

[0019] a second stopping module, configured to stop the range extender when the required power is less than the engine start threshold value.

[0020] In some embodiments, the engine start threshold value obtaining module is configured to obtain a vehicle speed of the extended-range vehicle; and obtain the engine start threshold value corresponding to the state of charge of the extended-range vehicle and the vehicle speed by querying a correspondence among the state of charge of the extended-range vehicle, the vehicle speed and the engine start threshold value.

[0021] In some embodiments, when the vehicle speed is less than a specified threshold value, the device further comprises:

[0022] a third starting module, configured to start the range extender when the state of charge of the extended-range vehicle is less than the first state of charge.

[0023] A third stopping module is configured to stop the range extender when the state of charge of the range-extending vehicle rises to the second state of charge.

[0024] In some embodiments, the apparatus further comprises:

[0025] A first information obtaining module is configured to obtain an accelerator pedal opening degree of the range-extending vehicle, an ambient temperature at which the range-extending vehicle is located, an altitude at which the range-extending vehicle is located, and an atmospheric pressure;

[0026] A second information obtaining module is configured to obtain, based on the accelerator pedal opening degree of the range-extending vehicle, the ambient temperature at which the range-extending vehicle is located, the altitude at which the range-extending vehicle is located, and the atmospheric pressure, a basic power generation of the range extender, an ambient temperature correction coefficient, and an atmospheric pressure correction coefficient, respectively;

[0027] A target power generation obtaining module is configured to obtain a product of the basic power generation, the ambient temperature correction coefficient, and the atmospheric pressure correction coefficient as a target power generation of the range extender;

[0028] A target rotating speed obtaining module is configured to obtain, by querying a correspondence between the target power generation and the rotating speed of the motor through the target power generation, a target rotating speed corresponding to the target power generation;

[0029] A first running module is configured to control the range extender to run at the target rotating speed.

[0030] In some embodiments, the second information obtaining module is configured to obtain, by querying a correspondence among the accelerator pedal opening degree of the range-extending vehicle, the vehicle speed, and the basic power generation through the accelerator pedal opening degree of the range-extending vehicle and the vehicle speed, the basic power generation of the range extender; obtain, by querying a correspondence among the ambient temperature at which the range-extending vehicle is located, the state of charge of the range-extending vehicle, and the ambient temperature correction coefficient through the ambient temperature at which the range-extending vehicle is located and the state of charge of the range-extending vehicle, the ambient temperature correction coefficient of the range extender; and obtain, by querying a correspondence among the altitude at which the range-extending vehicle is located, the atmospheric pressure, and the atmospheric pressure correction coefficient through the altitude at which the range-extending vehicle is located and the atmospheric pressure, the atmospheric pressure correction coefficient of the range extender.

[0031] In some embodiments, the apparatus further comprises:

[0032] A target control torque obtaining module is configured to obtain, by querying a correspondence between the target rotating speed and a control torque of the generator through the target rotating speed within a specified time length before the range extender is completely stopped, a target control torque corresponding to the target rotating speed;

[0033] The second operation module is configured to control the range extender to operate at the target control torque.

[0034] In another aspect, a computer device is provided, which includes a processor and a memory having stored therein at least one instruction, at least one program, a code set or an instruction set, which is loaded and executed by the processor to implement the range extender control method as described above.

[0035] In another aspect, a computer readable storage medium is provided, which has stored therein at least one instruction, at least one program, a code set or an instruction set, which is loaded and executed by a processor to implement the range extender control method as described above.

[0036] In yet another aspect, a computer program product is provided, which includes a computer program stored in a computer readable storage medium. A processor of a computer device reads the computer program from the computer readable storage medium, and the processor executes the computer program to cause the computer device to perform the range extender control method provided in the various optional implementation manners described above.

[0037] The technical solutions provided in the present application can include the following beneficial effects:

[0038] The hybrid control system of the range extended vehicle can obtain the state of charge and the demand power of the range extended vehicle in real time. The first state of charge sets the minimum power limit for starting the range extender, and the second state of charge serves as a shutdown threshold to prevent overcharging and protect the battery health. Based on the first state of charge and the second state of charge, the range extender can be started in time to supplement the power when the power of the vehicle is insufficient, while overcharging is avoided. Furthermore, the start threshold is introduced when the demand power of the vehicle exceeds the discharge capacity of the battery, so that the hybrid control system of the range extended vehicle can more accurately determine whether the range extender needs to be started / stopped based on the current vehicle operating conditions. The above scheme accurately sets the start / stop conditions of the range extender and flexibly adjusts according to the actual demand of the vehicle, which realizes more accurate and stable control of the range extender, effectively improves the accuracy of the hybrid control system of the range extended vehicle in controlling the range extender, and improves the control effect of the range extender.

[0039] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the present application. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the application and, together with the description, further serve to explain the principles of the application.

[0041] Figure 1 is a system configuration diagram of a range extender control method according to an embodiment of the present application;

[0042] Figure 2 is a flow chart of a range extender control method according to an embodiment of the present application;

[0043] Figure 3 is a flow chart of a range extender control method according to an embodiment of the present application;

[0044] Figure 4 is a flow chart of a start-stop strategy optimization and calibration method according to an embodiment of the present application;

[0045] Figure 5 is a schematic diagram of a start-stop strategy according to an embodiment of the present application;

[0046] Figure 6 is a block diagram of a range extender control device according to an example embodiment of the present application;

[0047] Figure 7 is a structural schematic diagram of a computer device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0048] The example embodiments will be described in detail herein with reference to the drawings. When the description below refers to accompanying drawings, unless otherwise noted, the same numbers in different drawings refer to the same or similar elements. The following description of example embodiments is not representative of all embodiments consistent with the present application.

[0049] Rather, they are examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.

[0050] The present application proposes a range extender control scheme, which can achieve more accurate and smooth control of the range extender, effectively improve the accuracy of the hybrid power control system of the range extender vehicle in controlling the range extender, and improve the control effect of the range extender. In order to facilitate understanding, some concepts related to the present application are explained as follows.

[0051] 1) Extended-range vehicle, a hybrid electric vehicle that combines the technology of pure electric vehicles and traditional internal combustion engine vehicles. Extended-range vehicles rely primarily on electric motors to drive the vehicle, while equipped with a small internal combustion engine (usually gasoline or diesel engine), which does not directly participate in driving the wheels, but as part of the generator, starts when the on-board battery is low, to generate electricity to extend the vehicle's driving range.

[0052] 2) Range extender, an auxiliary power device in extended-range vehicles, mainly composed of a small internal combustion engine and a generator, which starts when the on-board battery of the extended-range vehicle is low, generates electricity by burning fuel to extend the driving range of the extended-range vehicle.

[0053] 3) Hybrid control system in extended-range vehicles, an electronic control unit specially designed to manage and optimize the energy flow between the range extender (internal combustion engine combined with generator) and the electric drive system. The hybrid control system is responsible for monitoring battery charge, vehicle speed, driving demand and other parameters, and decides to start / stop the range extender to charge the battery, ensuring optimal performance and efficiency of the electric motor under any driving conditions.

[0054] 4) NVH (Noise, Vibration, and Harshness) performance, refers to the level of control over noise, vibration and harshness during vehicle operation. Good NVH performance ensures a quiet and smooth interior, reducing uncomfortable noise and vibration, providing a more pleasant driving and riding environment.

[0055] 5) SOC (State of Charge), represents the ratio between the current remaining capacity of the battery and its total capacity, usually expressed in percentage (0% to 100%). SOC is a key indicator of battery energy level, used to determine whether the battery needs to be charged, assess its endurance, and play an important role in optimizing energy management and ensuring system stability in electric vehicles and portable electronic devices.

[0056] 6) HCU (Hybrid Control Unit) is the core electronic control system in hybrid vehicles or plug-in hybrid vehicles, responsible for coordinating and optimizing energy distribution and working modes between internal combustion engines and electric motors. HCU precisely controls the interaction between the engine, motor and battery system through complex algorithms and real-time data processing to achieve optimal fuel efficiency, emission levels and driving performance.

[0057] Figure 1 is a system configuration diagram of the range extender control method of an embodiment of the present application. As shown in the figure, the system includes a range extender 1, a hybrid control unit 2, a battery management system 3, a power distribution unit 4, a power conversion unit 5, a motor control unit 6, a vehicle control unit 7, a communication interface 8, and a sensor network 9. Figure 1As shown, the system includes a range-extended electric vehicle 100, which includes a hybrid power control system 101.

[0058] The hybrid power control system 101 can acquire the state of charge (SOC) and power demand of the range-extended electric vehicle (REEV) 100. The power demand is the sum of the drive power of the REEV 100 and the accessory power of the REEV 100. When the power demand is less than the battery discharge power of the REEV 100 and the SOC of the REEV 100 meets the first SOC, the hybrid power control system 101 starts the range extender 100b. When the power demand is less than the battery discharge power of the REEV 100 and the SOC of the REEV 100 meets the second SOC, the hybrid power control system 101 stops the range extender 100b. When the second SOC is greater than the first SOC, a start-up threshold is acquired when the power demand is greater than the battery discharge power of the REEV 100. When the power demand is greater than the start-up threshold, the range extender 100b is started. When the power demand is less than the start-up threshold, the range extender 100b is stopped.

[0059] Figure 2 This is a flowchart illustrating a range extender control method according to an embodiment of this application. The range extender control method can be executed by the hybrid power control system of a range-extended electric vehicle (REEV), for example, the REEV can be the one described above. Figure 1 The range-extended electric vehicle 100 shown above, the aforementioned hybrid power control system can also be Figure 1 The hybrid power control system 101 is described above. The range extender control method may include steps 210, 220, 230, 240, 250, and 260, specifically implemented as follows:

[0060] Step 210: Obtain the state of charge and power demand of the range-extended vehicle; the power demand is the driving power of the range-extended vehicle plus the accessory power of the range-extended vehicle.

[0061] Among them, the state of charge (SOC) of the range-extended electric vehicle is the proportion of the remaining power capacity of the current range-extended electric vehicle's power battery to the total capacity of the power battery. The higher the SOC, the more sufficient the power battery of the current range-extended electric vehicle has, and the lower the SOC, the less sufficient the power battery of the current range-extended electric vehicle has.

[0062] In this embodiment of the application, the hybrid power control system can obtain the state of charge of the range-extended vehicle through real-time monitoring.

[0063] The driving power of the aforementioned range-extended electric vehicle is the power required by the electric motor of the range-extended electric vehicle to drive the vehicle.

[0064] The accessory power of the range-extender vehicle refers to the power required by the auxiliary equipment (such as air conditioner, audio and navigation) of the range-extender vehicle except the motor.

[0065] In the embodiment of the present application, the hybrid control system can calculate the required power of the range-extender vehicle by monitoring the driving state, the vehicle speed and the road condition of the range-extender vehicle in real time.

[0066] Step 220: starting the range-extender when the required power is less than the battery discharge power of the range-extender vehicle and the state of charge of the range-extender vehicle meets the first state of charge.

[0067] In the embodiment of the present application, the hybrid control system can monitor and acquire the battery discharge power of the range-extender vehicle in real time.

[0068] The first state of charge is a preset state of charge threshold, which is a parameter used by the hybrid control system to determine whether the current state of charge of the power battery is sufficient to maintain the operation of the range-extender vehicle.

[0069] In the embodiment of the present application, when the required power of the range-extender vehicle is less than the battery discharge power of the range-extender vehicle, it means that the discharge capacity of the power battery of the range-extender vehicle can meet the driving demand and the load demand of the vehicle, and the hybrid control system compares the state of charge of the range-extender vehicle with the first state of charge. When the state of charge of the range-extender vehicle is less than the first state of charge, the range-extender is started, that is, when the state of charge of the range-extender vehicle cannot maintain the operation of the range-extender vehicle, the hybrid control system starts the range-extender to generate electricity to maintain the normal driving of the range-extender vehicle.

[0070] Step 230: stopping the range-extender when the required power is less than the battery discharge power of the range-extender vehicle and the state of charge of the range-extender vehicle meets the second state of charge; the second state of charge is greater than the first state of charge.

[0071] The second state of charge is a preset state of charge threshold higher than the first state of charge, which is a parameter used by the hybrid control system to ensure that the battery will not be discharged excessively, avoiding unnecessary starting of the internal combustion engine when the power of the range-extender vehicle is sufficient.

[0072] In the embodiment of the present application, when the demand power of the extended-range vehicle is less than the discharge power of the battery of the extended-range vehicle, it indicates that the discharge capacity of the power battery of the current extended-range vehicle can meet the driving demand of the vehicle and the load demand of the vehicle, and the hybrid power control system compares the state of charge of the extended-range vehicle with the first state of charge. When the state of charge of the extended-range vehicle is less than the first state of charge, the range extender is started. That is, when the state of charge of the extended-range vehicle cannot be maintained for a long time to keep the extended-range vehicle running, the hybrid power control system starts the range extender to generate electricity to maintain the normal driving of the extended-range vehicle.

[0073] Step 240: obtaining an engine starting threshold when the demand power is greater than the discharge power of the battery of the extended-range vehicle.

[0074] The engine starting threshold is a preset power value of the demand power of the extended-range vehicle, which is used to determine whether the range extender needs to be started.

[0075] In some embodiments, when the demand power of the extended-range vehicle exceeds the discharge power of the battery, the hybrid power control system can obtain a preset engine starting threshold from an internal database.

[0076] In other embodiments, when the demand power of the extended-range vehicle exceeds the discharge power of the battery, the hybrid power control system can dynamically calculate and obtain the engine starting threshold based on the parameter information (such as the state of charge and the battery health state) of the current extended-range vehicle through a preset algorithm or model. The algorithm or model is an algorithm or model that has the ability to generate an engine starting threshold based on the state of charge and the battery health state.

[0077] Step 250: starting the range extender when the demand power is greater than the engine starting threshold.

[0078] In the embodiment of the present application, when the demand power of the vehicle is greater than the engine starting threshold, it indicates that the demand power of the current extended-range vehicle is high, and the energy generated by the power battery cannot meet the demand power. At this time, the range extender is started to provide additional power to ensure the normal operation of the extended-range vehicle.

[0079] Step 260: stopping the range extender when the demand power is less than the engine starting threshold.

[0080] In the embodiment of the present application, when the demand power of the vehicle is less than the engine starting threshold, it indicates that the power demand of the current vehicle is low, and the energy generated by the power battery can meet the demand power of the vehicle. At this time, the range extender is stopped.

[0081] In the embodiment of the present application, the hybrid control system of the extended-range vehicle can obtain the state of charge and the demand power of the extended-range vehicle in real time. The first state of charge sets the minimum power limit for starting the range extender, and the second state of charge serves as a shutdown threshold to prevent overcharging and protect the battery health. Based on the first state of charge and the second state of charge, the range extender can be started in time to supplement power when the vehicle power is insufficient, while overcharging is avoided. Furthermore, in the case where the demand power of the vehicle exceeds the battery discharge capacity, an engine start threshold is introduced, so that the hybrid control system of the extended-range vehicle can more accurately determine whether the range extender needs to be started / stopped based on the current vehicle operating conditions. The above scheme accurately sets the start / stop conditions of the range extender and flexibly adjusts according to the actual demand of the vehicle, thereby achieving more accurate and stable control of the range extender, effectively improving the accuracy of the hybrid control system of the extended-range vehicle in controlling the range extender, and improving the control effect of the range extender.

[0082] Based on Figure 2 , please refer to Figure 3 , Figure 3 is a flowchart of a range extender control method provided in an embodiment of the present application. Figure 2 Step 240 in the embodiment of the present application can be implemented as step 240a and step 240b, as follows:

[0083] Step 240a: Obtain the vehicle speed of the extended-range vehicle.

[0084] The vehicle speed refers to the speed of the vehicle during driving, usually in units of kilometers / hour or meters / second.

[0085] In the embodiment of the present application, the wheel speed sensor of the extended-range vehicle can continuously monitor the rotational speed of each wheel and transmit the vehicle speed to the hybrid control system through the vehicle network.

[0086] Step 240b: Query the corresponding relationship between the state of charge, the vehicle speed and the engine start threshold of the extended-range vehicle based on the state of charge and the vehicle speed of the extended-range vehicle, and obtain the engine start threshold corresponding to the state of charge and the vehicle speed of the extended-range vehicle.

[0087] In the embodiment of the present application, a database is provided in the hybrid control system, which stores the corresponding relationship between different predefined states of charge, vehicle speeds and engine start thresholds of the extended-range vehicle. After the hybrid control system obtains the state of charge and the vehicle speed of the extended-range vehicle, the database is queried to obtain the engine start threshold corresponding to the state of charge and the vehicle speed of the extended-range vehicle.

[0088] In the embodiment of the present application, when the whole vehicle demand power of the range extended vehicle exceeds the battery discharge power, the hybrid power control system inquires the correspondence relationship table of state of charge, vehicle speed and engine starting threshold according to the real-time state of charge and real-time vehicle speed of the whole vehicle, obtains the engine starting threshold closest to the current state of the vehicle, and improves the accuracy of the engine starting threshold.

[0089] Based on the scheme shown in any one or more of the above embodiments, in some embodiments, when the vehicle speed of the range extended vehicle is less than a specified threshold, the hybrid power control system of the range extended vehicle starts the range extender when the state of charge of the range extended vehicle is less than a first state of charge; and stops the range extender when the state of charge of the range extended vehicle rises to a second state of charge.

[0090] In the embodiment of the present application, when the range extended vehicle travels at a slow speed, the hybrid power control system continuously monitors the current state of charge of the vehicle, and starts the range extender when the current state of charge is lower than the first state of charge, indicating that the current power of the vehicle is insufficient to maintain normal operation of the vehicle. At this time, the hybrid power control system starts the range extender to obtain additional power. When the state of charge of the range extended vehicle rises to the second state of charge, it indicates that the power reserve of the range extended vehicle has reached a level that can maintain normal driving of the whole vehicle. To prevent over-discharge of the battery, the range extender is stopped, and the vehicle returns to the pure electric driving mode.

[0091] In the embodiment of the present application, the range extender is started when the vehicle speed is lower than a specified threshold and the state of charge is lower than the first state of charge, which ensures that the range extended vehicle will not be over-discharged when traveling at low speed or in a frequent start-stop state, maintains the necessary power reserve, effectively avoids the decline of the range extended power performance caused by insufficient power, and guarantees the reliability and driving safety of the range extender. When the state of charge of the range extended vehicle rises to the second state of charge, the range extender is stopped in time, avoiding resource waste. By setting different states of charge to trigger the start / stop of the range extender, the control efficiency of the range extender is improved.

[0092] Based on the scheme shown in any one or more of the above embodiments, in some embodiments, the hybrid control system of the range extended vehicle can further obtain an accelerator pedal opening degree of the range extended vehicle, an ambient temperature at which the range extended vehicle is located, an altitude at which the range extended vehicle is located, and an atmospheric pressure; based on the accelerator pedal opening degree of the range extended vehicle, the ambient temperature at which the range extended vehicle is located, the altitude at which the range extended vehicle is located, and the atmospheric pressure, a basic power generation of the range extender corresponding to the ambient temperature, an ambient temperature correction coefficient, and an atmospheric pressure correction coefficient are respectively obtained; a product of the basic power generation, the ambient temperature correction coefficient, and the atmospheric pressure correction coefficient is obtained as a target power generation of the range extender; by the target power generation, a corresponding relationship between the target power generation and a motor speed is queried to obtain a target speed corresponding to the target power generation; and the range extender is controlled to operate at the target speed.

[0093] The accelerator pedal opening degree refers to a speed at which a driver of the range extended vehicle steps on an accelerator pedal, and can indicate a demand of the driver for vehicle acceleration.

[0094] The ambient temperature refers to an air temperature of an environment in which the range extended vehicle is currently located, and the ambient temperature can affect working efficiencies of an engine and a battery of the range extended vehicle.

[0095] The altitude and the atmospheric pressure determine an air density of the environment in which the range extended vehicle is currently located.

[0096] In the embodiments of the present application, the hybrid control system can obtain the information through sensors of the range extended vehicle, for example, a real-time opening degree of a current accelerator pedal position is obtained through an accelerator pedal position sensor, the ambient temperature is obtained through real-time detection by a temperature sensor, and an atmospheric pressure value of the range extended vehicle is obtained through a real-time acquisition by an air pressure sensor.

[0097] The basic power generation refers to a minimum power generation that the range extender should provide under ideal conditions.

[0098] The ambient temperature correction coefficient is a coefficient for correcting efficiency fluctuations caused by ambient temperature changes of the range extended vehicle.

[0099] The atmospheric pressure correction coefficient is a coefficient for compensating for performance changes caused by differences in altitude and atmospheric pressure of the environment in which the range extended vehicle is currently located.

[0100] In the embodiments of the present application, the hybrid control system of the range extended vehicle can obtain the ambient temperature correction coefficient and the atmospheric pressure correction coefficient through a pre-stored mapping table, or can dynamically obtain the ambient temperature correction coefficient and the atmospheric pressure correction coefficient through an embedded algorithm model in combination with the current accelerator pedal opening degree, the ambient temperature, the altitude, and the atmospheric pressure.

[0101] Wherein, the target power generation power refers to the electric energy output power that the range extender should provide under the current environmental conditions and driving demand.

[0102] Wherein, the target rotating speed refers to the rotating speed that the range extender should maintain in order to achieve the target power generation power.

[0103] In the embodiment of the present application, after the hybrid power control system of the range extended vehicle obtains the basic power generation power, the environmental temperature correction coefficient and the air pressure correction coefficient, the hybrid power control system can multiply the three values to obtain the target power generation power of the range extender.

[0104] In the embodiment of the present application, after the hybrid power control system obtains the target power generation power, the hybrid power control system can query the mapping table of the target power generation power and the motor rotating speed stored internally, and obtain the target rotating speed corresponding to the target power generation power by querying the target power generation power.

[0105] In the embodiment of the present application, after the hybrid power control system obtains the target rotating speed corresponding to the target power generation power, the hybrid power control system sends a rotating speed setting signal to the range extender to instruct the range extender to operate at the target rotating speed.

[0106] In the embodiment of the present application, the hybrid power control system of the range extended vehicle can dynamically obtain the basic power generation power, the environmental temperature correction coefficient and the air pressure correction coefficient according to the real-time accelerator pedal opening degree of the range extended vehicle, the environmental temperature, the altitude and the atmospheric pressure information, and obtain the target rotating speed based on the basic power generation power, the environmental temperature correction coefficient and the air pressure correction coefficient, so that the range extender can operate at the target rotating speed under different environmental temperature and altitude conditions, the best performance is maintained, and the control effect of the range extender is improved.

[0107] Based on the scheme shown in any one or more of the above embodiments, in some embodiments, the hybrid power control system of the range extended vehicle queries the corresponding relationship among the accelerator pedal opening degree of the range extended vehicle, the vehicle speed and the basic power generation power of the range extended vehicle through the accelerator pedal opening degree and the vehicle speed of the range extended vehicle, to obtain the basic power generation power of the range extender; the hybrid power control system queries the corresponding relationship among the environmental temperature where the range extended vehicle is located, the state of charge of the range extended vehicle and the environmental temperature correction coefficient of the range extended vehicle through the environmental temperature where the range extended vehicle is located and the state of charge of the range extended vehicle, to obtain the environmental temperature correction coefficient of the range extender; the hybrid power control system queries the corresponding relationship among the altitude where the range extended vehicle is located, the atmospheric pressure and the air pressure correction coefficient through the altitude where the range extended vehicle is located and the atmospheric pressure, to obtain the air pressure correction coefficient of the range extender.

[0108] ​In the embodiments of the present application, the hybrid control system can be configured with a mapping table for storing the corresponding relationship between the accelerator pedal opening, the vehicle speed and the basic power generation of the range extended vehicle. After the hybrid control system obtains the accelerator pedal opening and the vehicle speed of the range extended vehicle, the mapping table is queried to obtain the basic power generation corresponding to the accelerator pedal opening and the vehicle speed of the range extended vehicle.

[0109] In the embodiments of the present application, the hybrid control system can be configured with a mapping table for storing the corresponding relationship between the ambient temperature of the range extended vehicle, the state of charge of the range extended vehicle and the ambient temperature correction coefficient. After the hybrid control system obtains the ambient temperature of the range extended vehicle and the state of charge of the range extended vehicle, the mapping table is queried to obtain the ambient temperature correction coefficient of the range extender.

[0110] In the embodiments of the present application, the hybrid control system can be configured with a mapping table for storing the corresponding relationship between the altitude of the range extended vehicle, the atmospheric pressure and the air pressure correction coefficient. After the hybrid control system obtains the altitude of the range extended vehicle and the atmospheric pressure, the mapping table is queried to obtain the air pressure correction coefficient of the range extender.

[0111] In the embodiments of the present application, the hybrid control system queries the corresponding mapping table according to the current accelerator pedal opening and the vehicle speed of the range extended vehicle to obtain the basic power generation that best meets the current vehicle driving demand, effectively ensuring the power output of the range extender, obtains the ambient temperature correction coefficient according to the ambient temperature and the state of charge of the range extended vehicle to dynamically adjust the power generation efficiency of the range extender, and queries the air pressure correction coefficient according to the altitude and the atmospheric pressure information to optimize the working efficiency of the range extender under different altitudes and air pressures through the air pressure correction coefficient, thereby avoiding performance fluctuations caused by changes in air density and effectively improving the control efficiency of the range extender.

[0112] Based on the schemes shown in any one or more of the above embodiments, in some embodiments, the hybrid control system of the range extended vehicle queries the corresponding relationship between the target speed and the control torque of the generator through the target speed within a specified time period before the range extender completely stops to obtain the target control torque corresponding to the target speed, and controls the range extender to operate at the target control torque.

[0113] To explain the method implementation steps described in the above patent claims in detail, we can break it down into a series of specific operation processes. This method is mainly used to optimize the running efficiency of the range extender in the range extended electric vehicle (REEV) before it stops, ensuring that it works with the most appropriate torque value, thereby maximizing the use of remaining energy and smoothly transitioning to the stopped state.

[0114] The specified time length is a predetermined time length before the range extender completely stops, and the working state of the range extender can be adjusted without affecting the performance of the range-extended electric vehicle within the specified time length.

[0115] In the embodiment of the application, when the range extender enters the state of about to stop, the hybrid power control system can obtain the target control torque corresponding to the target rotating speed by looking up a mapping table after obtaining the target rotating speed, and the mapping table stores the corresponding relationship between the target rotating speed and the control torque of the generator.

[0116] In the embodiment of the application, after the hybrid power control system obtains the target control torque, a running instruction containing the target control torque is sent to the range extender, so as to ensure that the range extender can run at the target control torque.

[0117] In the embodiment of the application, the control torque of the range extender is dynamically adjusted based on the target rotating speed of the range extender within the specified time length before the range extender completely stops, so as to avoid the hardware wear problem of the range extender and the bad user experience such as vehicle shaking caused by rapid stopping, and to help improve the stability of the range extender in the stopping process, effectively improve the stability of the range extender in stopping, and effectively improve the control effect on the range extender.

[0118] Based on the steps in the above Figure 2 to Figure 3 embodiment, the embodiment of the application shows an application of a range-extended electric vehicle start-stop strategy and a calibration method. The specific content is as follows:

[0119] 1. A range-extended electric vehicle start-stop strategy and a calibration method, mainly using calibration tools such as CANape, INCA, etc. to modify and collect data for analysis;

[0120] 2. A range-extended electric vehicle start-stop strategy and a calibration method, the main steps are: setting the start-stop machine calibration target, collecting the running data of the test vehicle under various working conditions, establishing the start-stop strategy, verifying the real vehicle, optimizing and calibrating the start-stop strategy, etc.

[0121] 3. Further, the vehicle defaults to an engine stop state, when the demand power is greater than the start threshold (which can be calibrated), the engine is started, and when the demand power is not greater than the stop threshold (which can be calibrated), the engine remains in a stop state; wherein the demand power can be obtained from the driver demand power (PedalMap x vehicle speed), and the start threshold can be obtained from the SOC and the vehicle speed.

[0122] 4. Further, after starting, when the demand power is less than the stop threshold (which can be calibrated), the engine starts the stopping process and enters the stop state, otherwise the engine continues to run; wherein the demand power can be obtained from the driver demand power (PedalMap x vehicle speed), and the stop threshold can be obtained from the SOC and the vehicle speed.

[0123] For example, refer to Figure 4 , Figure 4 is a flow chart of an optimization and calibration process of a start-stop strategy provided by an embodiment of the present application, which includes the following steps:

[0124] Step 41: Set the start-stop target.

[0125] In an embodiment of the present application, the computer device collects basic data, which includes but is not limited to: engine external characteristic scan points, multi-vehicle speed section constant speed cycle discharge battery available discharge power scan points, driver demand power collection under different accelerator pedal opening degrees, range extender actual working load intensity, power generation efficiency, etc.

[0126] Step 42: Collect basic data and preliminarily establish a start-stop strategy.

[0127] For example, refer to Figure 5 , Figure 5 is a schematic diagram of a start-stop strategy provided by an embodiment of the present application, which includes two judgment steps:

[0128] Step S1: Determine whether the demand power is greater than the start power.

[0129] In an embodiment of the present application, the range extender is in a shutdown state by default, at this time the HCU determines whether the demand power of the range extender vehicle is greater than the start threshold value, the demand power can be the driver demand power, and the start threshold value can be obtained by the state of charge and the vehicle speed; in the case where the demand power is greater than the start threshold value, the engine in the range extender is started, and in the case where the demand power is not greater than the start threshold value, the engine in the range extender is not started and continues to remain in the shutdown state.

[0130] Step S2: Determine whether the demand power is less than the stop threshold.

[0131] In an embodiment of the present application, after starting the engine in the range extender, it is further determined whether the demand power is less than the shutdown threshold, which can be obtained by the state of charge and the vehicle speed; in the case where the demand power is less than the shutdown threshold, the HCU controls the range extender to enter the shutdown state, and in the case where the demand power is not less than the shutdown threshold, the HCU starts the engine.

[0132] Step 43: Real vehicle verification.

[0133] In the start-stop strategy, a SOC balance threshold is set. In the state of no demand power of the extended-range vehicle, the engine is started naturally when the SOC decreases to 12%, and the engine is stopped naturally when the SOC reaches 15%. In the state of demand power of the extended-range vehicle, the engine is started when the demand power is greater than the start threshold (SOC and vehicle speed table values, which can be calibrated). When the demand power is less than the stop threshold (SOC and vehicle speed table values, which can be calibrated), the engine starts the stop process and enters the stop state. The SOC balance point is appropriately adjusted to be higher under the condition of high vehicle speed and high power demand. The start-stop strategy is verified based on the preliminary establishment, so as to preliminarily investigate the performance of the actual vehicle.

[0134] Step 44: Start-stop strategy optimization and calibration.

[0135] In the embodiment of the application, the idle generation (parking generation) start-stop engine, power and speed strategy optimization and calibration are performed. When the vehicle speed of the extended-range vehicle is less than 3 km / h and the gear is in P / N gear, the idle generation mode is entered. When the SOC is lower than 12% (the above set value), the engine in the extended-range vehicle is automatically started, and the SOC rises to 15% (the above set value) and the engine is automatically stopped.

[0136] In the embodiment of the application, the idle generation power is composed of the sum of the idle generation power point (calibration value) and the high-pressure accessory power, which can be divided into three different power points of high, base and low, and the parking generation power calibration can be performed. According to the different gradient generation power (demand power), the one-dimensional table of corresponding generation speed can be established and calibrated.

[0137] In the embodiment of the application, the engine start-stop, power and speed strategy optimization and calibration in the series operation mode can be performed. According to the vehicle speed and load, the current demand power can be calculated, and different tables can be performed according to the preset different energy modes and driving modes.

[0138] In the embodiment of the present application, the basic engine starting power point can be obtained by querying the engine starting power threshold table (a two-dimensional table showing SOC and vehicle speed), and then a series of one-dimensional table correction coefficients such as ambient temperature, different altitudes (calibration) are used to obtain the corrected starting power table. When the demand power is greater than the corrected starting power point, the engine starts; otherwise, the engine shutdown power threshold table is established, and after table lookup and a series of corrections, the corrected shutdown power table is obtained. When the demand power is less than the corrected shutdown power point, the engine stops. After starting, the basic power generation of the range extender is obtained by table lookup according to different accelerator pedal opening and vehicle speed (calibration), and the ambient temperature correction coefficient is obtained by two-dimensional table lookup according to ambient temperature and table SOC (calibration). The atmospheric pressure correction coefficient is obtained by one-dimensional table lookup according to different altitudes. The above three are multiplied to obtain the target power generation. Then, based on the power, one-dimensional table lookup is performed to obtain the corresponding speed value under the power generation (calibration).

[0139] In some embodiments, the HCU can establish a shutdown assistance strategy. In order to ensure the stability of the engine shutdown, the shutdown assistance strategy is established, and the function is turned on when the engine is shut down. The shutdown assistance time (calibration) is set, such as 2s. The torque control (calibration) of the generator can be obtained by table lookup according to different speeds.

[0140] Step 45: Determine whether the expected target is reached.

[0141] In the embodiment of the present application, based on the above-mentioned start-stop strategy optimization, real vehicle testing is performed. If the expected target is reached, the strategy optimization and calibration task is completed, otherwise, the start-stop strategy and calibration data need to be optimized again, and the real vehicle verification is performed. This is repeated until the expected target is reached.

[0142] In the embodiment of the present application, by using the range extender start-stop strategy calibration method, the start-stop strategy of the range extender of the electric vehicle can be optimized. Based on the driving, charging and discharging, energy utilization and other strategy schemes of new energy vehicles, the start-stop strategy optimization can effectively improve the energy utilization efficiency, provide better driving experience for users, and improve the product competitiveness.

[0143] The above is only one embodiment of the present application, which should not be regarded as a limitation of the present application. Professionals should understand that various modifications and changes can be made to the embodiment to adapt to different application requirements. Therefore, the scope of the present application should be defined by the claims attached to the claims.

[0144] Please refer to Figure 6 , which shows a block diagram of a range extender control device provided by an exemplary embodiment of the present application. The data processing device can be realized as all or part of a computer device by hardware or a combination of hardware and software, to realize the aboveFigure 2 to Figure 3 all or part of the steps in the embodiments shown.

[0145] As shown in the embodiments shown, the range extender control device comprises: Figure 6

[0146] The information acquisition module 601 is configured to acquire the state of charge of the range extended vehicle and the required power; the required power is the driving power of the range extended vehicle plus the accessory power of the range extended vehicle.

[0147] The first starting module 602 is configured to start the range extender when the required power is less than the discharging power of the battery of the range extended vehicle and the state of charge of the range extended vehicle meets the first state of charge.

[0148] The first stopping module 603 is configured to stop the range extender when the required power is less than the discharging power of the battery of the range extended vehicle and the state of charge of the range extended vehicle meets the second state of charge; the second state of charge is greater than the first state of charge.

[0149] The engine starting threshold acquisition module 604 is configured to acquire the engine starting threshold when the required power is greater than the discharging power of the battery of the range extended vehicle.

[0150] The second starting module 605 is configured to start the range extender when the required power is greater than the engine starting threshold.

[0151] The second stopping module 606 is configured to stop the range extender when the required power is less than the engine starting threshold.

[0152] In some embodiments, the engine starting threshold acquisition module 604 is configured to acquire the vehicle speed of the range extended vehicle; by querying the correspondence among the state of charge, the vehicle speed, and the engine starting threshold of the range extended vehicle, the engine starting threshold corresponding to the state of charge and the vehicle speed of the range extended vehicle is acquired.

[0153] In some embodiments, when the vehicle speed is less than a specified threshold, the device further comprises:

[0154] The third starting module is configured to start the range extender when the state of charge of the range extended vehicle is less than the first state of charge.

[0155] The third stopping module is configured to stop the range extender when the state of charge of the range extended vehicle rises to the second state of charge.

[0156] In some embodiments, the device further comprises:

[0157] The first information acquisition module 601 is configured to acquire the accelerator pedal opening degree of the range extended vehicle, the ambient temperature in which the range extended vehicle is located, the altitude at which the range extended vehicle is located, and the atmospheric pressure.

[0158] ​The second information obtaining module 601 is configured to obtain, based on the accelerator pedal opening degree of the range extended vehicle, the ambient temperature at which the range extended vehicle is located, the altitude at which the range extended vehicle is located, and the atmospheric pressure, the basic power generation of the range extender, the ambient temperature correction coefficient, and the atmospheric pressure correction coefficient respectively.

[0159] The target power generation obtaining module is configured to obtain the product of the basic power generation, the ambient temperature correction coefficient, and the atmospheric pressure correction coefficient as the target power generation of the range extender.

[0160] The target speed obtaining module is configured to query the corresponding relationship between the target power generation and the motor speed by the target power generation, and obtain the target speed corresponding to the target power generation.

[0161] The first running module is configured to control the range extender to run at the target speed.

[0162] In some embodiments, the second information obtaining module 601 is configured to query the corresponding relationship among the accelerator pedal opening degree of the range extended vehicle, the vehicle speed, and the basic power generation of the range extended vehicle by the accelerator pedal opening degree and the vehicle speed of the range extended vehicle, and obtain the basic power generation of the range extender; query the corresponding relationship among the ambient temperature at which the range extended vehicle is located, the state of charge of the range extended vehicle, and the ambient temperature correction coefficient of the range extended vehicle by the ambient temperature at which the range extended vehicle is located and the state of charge of the range extended vehicle, and obtain the ambient temperature correction coefficient of the range extender; and query the corresponding relationship among the altitude at which the range extended vehicle is located, the atmospheric pressure, and the atmospheric pressure correction coefficient of the range extended vehicle by the altitude at which the range extended vehicle is located and the atmospheric pressure, and obtain the atmospheric pressure correction coefficient of the range extender.

[0163] In some embodiments, the device further comprises:

[0164] The target control torque obtaining module is configured to query the corresponding relationship between the target speed and the control torque of the generator by the target speed within a specified time length before the range extender completely stops, and obtain the target control torque corresponding to the target speed.

[0165] The second running module is configured to control the range extender to run at the target control torque.

[0166] Please refer to Figure 7 , Figure 7Figure 7 is a block diagram of a computer device according to an example embodiment of the present application. The computer device 700 includes a central processing unit (CPU) 701, a system memory 704, including a random access memory (RAM) 702 and a read-only memory (ROM) 703, and a system bus 705 that couples the system memory 704 to the central processing unit 701. The computer device 700 also includes a basic input / output system (I / O) 706 that helps transfer information between elements of the computer, and a mass storage device 707 for storing an operating system 713, application programs 714, and other program modules 715.

[0167] The basic input / output system 706 includes a display 708 for displaying information and an input device 709, such as a mouse, keyboard, or the like, for inputting information into the computer. The display 708 and input device 709 are connected to the central processing unit 701 through an input / output controller 710 that is connected to the system bus 705. The basic input / output system 706 can also include the input / output controller 710 for receiving and processing input from a number of other devices, including a keyboard, mouse, or electronic stylus. Similarly, the input / output controller 710 provides output to a display screen, printer, or other type of output device.

[0168] The mass storage device 707 is connected to the central processing unit 701 through a mass storage controller (not shown) that is connected to the system bus 705. The mass storage device 707 and its associated computer-readable media provide non-volatile storage for the computer device 700. That is, the mass storage device 707 can include a computer-readable medium (not shown) such as a hard disk or a CD-ROM (Compact Disc Read-Only Memory) drive.

[0169] Without loss of generality, the computer readable medium can include computer storage media and communication media. Computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes, but is not limited to, RAM, ROM, EPROM, EEPROM, flash memory or other solid state memory technology, CD-ROM, digital video disc (DVD), or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices. Of course, those skilled in the art will recognize that computer storage media is not limited to the foregoing examples. The system memory 704 and mass storage device 707 described above can be collectively referred to as memory.

[0170] The computer device 700 can be connected to the Internet or other network devices through the network interface unit 711 connected to the system bus 705.

[0171] The memory further includes one or more programs, and the one or more programs are stored in the memory, and the central processing unit 701 implements all or part of the steps of the method shown in the embodiments by executing the one or more programs. Figure 2 to Figure 4

[0172] In the exemplary embodiments, a chip is also provided, and the chip includes programmable logic circuit and / or program instructions, and when the chip is running on the computer device, the chip is used to implement all or part of the steps of the method shown in the embodiments of the present application.

[0173] In the exemplary embodiments, a computer program product is also provided, and the computer program product includes computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor reads and executes the computer instructions from the computer readable storage medium to implement all or part of the steps of the method shown in the embodiments of the present application.

[0174] ​In the example embodiments, a computer readable storage medium is also provided, and the computer readable storage medium stores a computer program, and the computer program is loaded and executed by a processor to implement all or part of the steps of the method shown in the above embodiments of the present application.

[0175] A person of ordinary skill in the art can understand that all or part of the steps of the above embodiments can be completed by hardware, or by program to instruct related hardware, and the above program can be stored in a computer readable storage medium, and the storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0176] Those skilled in the art should realize that, in the above one or more examples, the functions described in the embodiments of the present application can be implemented by hardware, software, firmware or any combination thereof. When implemented by software, these functions can be stored in a computer readable medium or transmitted as one or more instructions or codes on a computer readable medium. The computer readable medium includes a computer storage medium and a communication medium, wherein the communication medium includes any medium that facilitates the transfer of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general or special purpose computer.

[0177] The above is only an optional embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A range extender control method, characterized in that, The method is executed by a hybrid control system of a range-extender vehicle, and the method comprises: obtaining a state of charge of the range-extender vehicle and a demand power; the demand power is a driving power of the range-extender vehicle plus an accessory power of the range-extender vehicle; starting a range-extender when the demand power is less than a battery discharge power of the range-extender vehicle and the state of charge of the range-extender vehicle meets a first state of charge; stopping the range-extender when the demand power is less than the battery discharge power of the range-extender vehicle and the state of charge of the range-extender vehicle meets a second state of charge; the second state of charge is greater than the first state of charge; obtaining an engine starting threshold when the demand power is greater than the battery discharge power of the range-extender vehicle; starting the range-extender when the demand power is greater than the engine starting threshold; stopping the range-extender when the demand power is less than the engine starting threshold; obtaining an accelerator pedal opening of the range-extender vehicle, an ambient temperature where the range-extender vehicle is located, an altitude where the range-extender vehicle is located, and an atmospheric pressure; obtaining a basic power generation of the range-extender, an ambient temperature correction coefficient, and an atmospheric pressure correction coefficient corresponding to the range-extender respectively based on the accelerator pedal opening of the range-extender vehicle, the ambient temperature where the range-extender vehicle is located, the altitude where the range-extender vehicle is located, and the atmospheric pressure; obtaining a product of the basic power generation, the ambient temperature correction coefficient, and the atmospheric pressure correction coefficient as a target power generation of the range-extender; obtaining a target speed corresponding to the target power generation by querying a corresponding relationship between the target power generation and a motor speed through the target power generation; controlling the range-extender to operate at the target speed.

2. The method of claim 1, wherein, The obtaining of the engine starting threshold when the demand power is greater than the battery discharge power of the range-extender vehicle comprises: obtaining a vehicle speed of the range-extender vehicle; obtaining an engine starting threshold corresponding to the state of charge of the range-extender vehicle and the vehicle speed by querying a corresponding relationship among the state of charge of the range-extender vehicle, the vehicle speed, and the engine starting threshold through the state of charge of the range-extender vehicle and the vehicle speed.

3. The method of claim 2, wherein, When the vehicle speed is less than a specified threshold, the method further comprises: starting the range-extender when the state of charge of the range-extender vehicle is less than the first state of charge; stopping the range-extender when the state of charge of the range-extender vehicle rises to the second state of charge.

4. The method of claim 1, wherein, The obtaining of the basic power generation of the range-extender, the ambient temperature correction coefficient, and the atmospheric pressure correction coefficient corresponding to the range-extender respectively based on the accelerator pedal opening of the range-extender vehicle, the ambient temperature where the range-extender vehicle is located, the altitude where the range-extender vehicle is located, and the atmospheric pressure comprises: obtaining the basic power generation of the range-extender by querying a corresponding relationship among the accelerator pedal opening of the range-extender vehicle, the vehicle speed, and the basic power generation through the accelerator pedal opening of the range-extender vehicle and the vehicle speed; The ambient temperature correction coefficient of the range extender is obtained by querying a corresponding relationship among the ambient temperature of the range extender, the state of charge of the range extender, and the ambient temperature correction coefficient according to the ambient temperature of the range extender and the state of charge of the range extender. The air pressure correction coefficient of the range extender is obtained by querying a corresponding relationship among the altitude of the range extender, the atmospheric pressure, and the air pressure correction coefficient according to the altitude of the range extender and the atmospheric pressure.

5. The method of claim 1, wherein, The method further comprises: A target control torque corresponding to the target rotating speed is obtained by querying a corresponding relationship between the target rotating speed and the control torque of the generator according to the target rotating speed within a specified time period before the range extender completely stops; The range extender is controlled to operate at the target control torque.

6. A range extender control device characterized by, The device comprises: An information obtaining module is configured to obtain the state of charge of the range extender and a demand power; the demand power is the driving power of the range extender plus the accessory power of the range extender; A first starting module is configured to start the range extender when the demand power is less than the battery discharge power of the range extender and the state of charge of the range extender meets a first state of charge; A first stopping module is configured to stop the range extender when the demand power is less than the battery discharge power of the range extender and the state of charge of the range extender meets a second state of charge; the second state of charge is greater than the first state of charge; An engine starting threshold obtaining module is configured to obtain an engine starting threshold when the demand power is greater than the battery discharge power of the range extender; A second starting module is configured to start the range extender when the demand power is greater than the engine starting threshold; A second stopping module is configured to stop the range extender when the demand power is less than the engine starting threshold; A first information obtaining module is configured to obtain the opening degree of an accelerator pedal of the range extender, the ambient temperature of the range extender, the altitude of the range extender, and the atmospheric pressure; A second information obtaining module is configured to obtain, based on the opening degree of the accelerator pedal of the range extender, the ambient temperature of the range extender, the altitude of the range extender, and the atmospheric pressure, a basic power generation of the range extender, an ambient temperature correction coefficient, and an air pressure correction coefficient corresponding to the range extender, respectively; A target power generation obtaining module is configured to obtain a product of the basic power generation, the ambient temperature correction coefficient, and the air pressure correction coefficient as a target power generation of the range extender; A target rotating speed obtaining module is configured to obtain a target rotating speed corresponding to the target power generation by querying a corresponding relationship between the target power generation and the rotating speed of the motor according to the target power generation; A first operating module is configured to control the range extender to operate at the target rotating speed.

7. A computer device, comprising: The computer device comprises a processor and a memory, and the memory stores instructions which are executed by the processor to implement the range extender control method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The storage medium stores instructions, and the instructions are executed by a processor of the computer device to implement the range extender control method according to any one of claims 1 to 5.

9. A computer program product, characterised in that, The computer program product comprises computer instructions stored in a computer readable storage medium; the computer instructions are read and executed by a processor of the computer device to implement the range extender control method according to any one of claims 1 to 5.

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