CN119898322A

CN119898322A - Range extender control method, device, equipment, storage medium and program product

Info

Publication number: CN119898322A
Application number: CN202510129245.2A
Authority: CN
Inventors: 李向利; 高守军; 杨文凯; 于尧; 吴腾; 周俊
Original assignee: Chery New Energy Automobile Co Ltd
Current assignee: Chery New Energy Automobile Co Ltd
Priority date: 2025-02-05
Filing date: 2025-02-05
Publication date: 2025-04-29

Abstract

The present application is about a range extender control method, device, equipment, storage medium and program product, and relates to the field of new energy vehicle technology. The method is executed by a hybrid power control system of a range extender, and the method includes: obtaining the state of charge and required power of the range extender; when the required power is less than the battery discharge power of the range extender and the state of charge of the range extender satisfies the first state of charge, starting the range extender; when the required power is less than the battery discharge power of the range extender and the state of charge of the range extender satisfies the second state of charge, stopping the range extender; the second state of charge is greater than the first state of charge; when the required power is greater than the battery discharge power of the range extender, obtaining the start threshold; when the required power is greater than the start threshold, starting the range extender; when the required power is less than the start threshold, stopping the range extender.

Description

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

Technical Field

The embodiment of the application relates to the technical field of new energy automobiles, in particular to a range extender control method, a device, equipment, a storage medium and a program product.

Background

With the rapid development of new energy automobile industry, extended range electric automobiles are widely focused by users, and an extended range electric automobile can be started when the state of charge of a high-voltage battery is insufficient or available power can not meet required power, so that the battery is charged or the whole automobile is powered, and a control method for the extended range electric automobile is particularly important.

In the related art, during the running process of the range-extended automobile, the engine management system of the vehicle can monitor the charge state of the battery of the vehicle and the required power of the vehicle in real time, and when the charge state is detected to be lower than the preset lowest charge state or the current available power is insufficient to meet the required power of the vehicle, the engine management system of the vehicle starts the range extender, generates electricity through the range extender and charges the battery or directly supplies electricity to the motor, otherwise, if the charge state of the battery of the vehicle is raised to a higher charge state threshold value, and the required power of the vehicle is recovered to be normal, the engine management system of the vehicle shuts down the range extender.

However, in the solution shown in the related art, the factor considered in the control method of the range extender electric vehicle is relatively single, which results in lower control accuracy of the range extender and affects the control effect of the range extender.

Disclosure of Invention

The embodiment of the application provides a control method, a device, equipment, a storage medium and a program product of a range extender, which can improve the accuracy of a hybrid power control system of a range extender automobile on the control of the range extender and improve the control effect on the range extender, and the technical scheme is as follows:

In one aspect, a range extender control method is provided, the method being performed by a hybrid control system of a range-extending vehicle, the method comprising:

Acquiring the charge state and the required power of the extended-range automobile, wherein the required power is the driving power of the extended-range automobile plus the accessory power of the extended-range automobile;

Starting a range extender when the required power is smaller than the battery discharge power of the range extender automobile and the state of charge of the range extender automobile meets a first state of charge;

Stopping the range extender when the required power is smaller than the battery discharge power of the range extender automobile and the state of charge of the range extender automobile meets a second state of charge, wherein the second state of charge is larger than the first state of charge;

acquiring a start threshold under the condition that the required power is larger than the battery discharge power of the extended range automobile;

Starting the range extender under the condition that the required power is larger than the starting threshold value;

And stopping the range extender under the condition that the required power is smaller than the starting threshold value.

In another aspect, there is provided a range extender control device, the device comprising:

the information acquisition module is used for acquiring the charge state and the required power of the extended range automobile, wherein the required power is the driving power of the extended range automobile plus the accessory power of the extended range automobile;

the first starting module is used for starting the range extender when the required power is smaller than the battery discharge power of the range extender automobile and the state of charge of the range extender automobile meets a first state of charge;

the first stopping module is used for stopping the range extender when the required power is smaller than the battery discharge power of the range-extending automobile and the state of charge of the range-extending automobile meets a second state of charge, wherein the second state of charge is larger than the first state of charge;

the starting threshold value acquisition module is used for acquiring a starting threshold value under the condition that the required power is larger than the battery discharge power of the extended range automobile;

the second starting module is used for starting the range extender under the condition that the required power is larger than the starting threshold value;

And the second stopping module is used for stopping the range extender under the condition that the required power is smaller than the starting threshold value.

In some embodiments, the start-up threshold obtaining module is configured to obtain a vehicle speed of the extended-range vehicle, and query a corresponding relationship among the state of charge of the extended-range vehicle, the vehicle speed, and the start-up threshold according to the state of charge of the extended-range vehicle and the vehicle speed, to obtain a start-up threshold corresponding to the state of charge of the extended-range vehicle and the vehicle speed.

In some embodiments, when the vehicle speed is less than a specified threshold, the apparatus further comprises:

The third starting module is used for starting the range extender when the charge state of the range extender automobile is smaller than the first charge state;

And the third stopping module is used for stopping the range extender when the charge state of the range-extending automobile rises to the second charge state.

In some embodiments, the apparatus further comprises:

The first information acquisition module is used for acquiring the opening degree of an accelerator pedal of the extended range automobile, the ambient temperature of the extended range automobile, the altitude of the extended range automobile and the atmospheric pressure;

The second information acquisition module is used for respectively acquiring basic power generation, an ambient temperature correction coefficient and an air pressure correction coefficient corresponding to the range extender based on the opening degree of an accelerator pedal of the range extender automobile, the ambient temperature of the range extender automobile, the altitude of the range extender automobile and the atmospheric pressure;

the target power generation power acquisition module is used for acquiring the product of the basic power generation power, the ambient temperature correction coefficient and the air pressure correction coefficient as the target power generation power of the range extender;

The target rotating speed acquisition module is used for inquiring the corresponding relation between the target generating power and the motor rotating speed through the target generating power to acquire a target rotating speed corresponding to the target generating power;

And the first operation module is used for controlling the range extender to operate at the target rotating speed.

In some embodiments, the second information obtaining module is configured to obtain the basic power of the range extender by querying a corresponding relationship among an accelerator pedal opening of the range extender automobile, the vehicle speed and the basic power of the range extender according to the accelerator pedal opening of the range extender automobile and the vehicle speed, and obtain the ambient temperature correction coefficient of the range extender by querying a corresponding relationship among an ambient temperature of the range extender automobile, a charge state of the range extender automobile and an ambient temperature correction coefficient according to an ambient temperature of the range extender automobile and a charge state of the range extender automobile, and obtain the air pressure correction coefficient of the range extender according to an altitude of the range extender automobile and an atmospheric pressure.

In some embodiments, the apparatus further comprises:

the target control torque acquisition module is used for inquiring the corresponding relation between the target rotating speed and the control torque of the generator through the target rotating speed within a designated time period before the range extender completely stops, and acquiring the target control torque corresponding to the target rotating speed;

and the second operation module is used for controlling the range extender to operate with the target control torque.

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

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

In yet another aspect, a computer program product is provided that includes a computer program stored in a computer readable storage medium. The processor of the computer device reads the computer program from the computer-readable storage medium, and the processor executes the computer program so that the computer device executes the range extender control method provided in the above-described various alternative implementations.

The technical scheme provided by the application can comprise the following beneficial effects:

The hybrid power control system of the range extender automobile can acquire the charge state and the required power of the range extender automobile in real time, the first charge state sets the lowest electric quantity limit for starting the range extender, the second charge state is used as a stop threshold, the over-charge phenomenon is prevented, the battery health is protected, the range extender can be timely started to supplement electric energy when the electric quantity of the whole automobile is insufficient based on the first charge state and the second charge state, the over-charge phenomenon is avoided, further, the start threshold is introduced under the condition that the required power of the whole automobile exceeds the battery discharging capacity, the hybrid power control system of the range extender automobile can accurately judge whether the range extender needs to be started or stopped based on the current working condition of the whole automobile, the starting/stopping condition of the range extender is accurately set, and the range extender is flexibly adjusted according to the actual requirement of the whole automobile, the range extender is controlled more accurately and stably, and the control effect of the range extender is effectively improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

FIG. 1 is a system configuration diagram of a range extender control method according to an embodiment of the present application;

FIG. 2 is a flow chart of a range extender control method according to one embodiment of the present application;

FIG. 3 is a flow chart of a range extender control method according to one embodiment of the present application;

FIG. 4 is a block flow diagram of a start-stop strategy optimization and calibration provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a start-stop strategy provided by an embodiment of the present application;

FIG. 6 is a block diagram of a range extender control device provided in an exemplary embodiment of the present application;

Fig. 7 is a schematic diagram of a computer device according to an exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application.

Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.

The application provides a range extender control scheme which can realize more accurate and stable control of the range extender, effectively improves the accuracy of a hybrid power control system of a range extender automobile in controlling the range extender, improves the control effect of the range extender, and explains some concepts related to the range extender for easy understanding.

1) The extended range automobile is a hybrid electric automobile combining the technology of a pure electric automobile and the technology of a traditional internal combustion engine automobile. Extended range automobiles rely primarily on electric motors to drive the vehicle, while being equipped with a small internal combustion engine (typically a gasoline or diesel engine) that does not directly participate in driving the wheels, but rather is instead part of a generator that is started when the vehicle battery is undercharged to generate electricity to extend the range of the vehicle.

2) The range extender is an auxiliary power device in a range-extending automobile and mainly comprises a small internal combustion engine and a generator, and is started when the electric quantity of a vehicle-mounted battery of the range-extending automobile is insufficient, and the driving mileage of the range-extending automobile is prolonged by combusting fuel to generate electricity.

3) The hybrid control system in the extended-range automobile is an electronic control unit specially designed for managing and optimizing the energy flow between the extended-range device (the combination of an internal combustion engine and a generator) and an electric driving system, and is responsible for monitoring parameters such as battery electric quantity, vehicle speed, driving requirements and the like, and determining to start/stop the extended-range device to charge the battery according to the parameters, so that the optimal performance and efficiency of the motor can be maintained under any driving condition.

4) NVH (Noise, vibration, AND HARSHNESS) performance, which refers to the level of control of Noise, vibration, and harshness of a vehicle when running, ensures quietness and smoothness of the interior of the vehicle, reduces uncomfortable Noise and Vibration, and provides a more pleasant driving and riding environment.

5) SOC (State of Charge), which represents the ratio between the current remaining capacity of the battery and its total capacity, is generally expressed in percentage (0% to 100%). SOC is a key indicator for measuring the energy level of a battery, and is used for determining whether the battery needs to be charged, evaluating the cruising ability of the battery, and playing an important role in optimizing energy management and ensuring stable operation of a system in electric automobiles and portable electronic devices.

6) The HCU (Hybrid Control Unit, hybrid controller) is the core electronic control system in a hybrid vehicle or plug-in hybrid vehicle, responsible for coordinating and optimizing the energy distribution and operating modes between the internal combustion engine and the electric motor. The HCU precisely controls interactions between the engine, motor, and battery system through complex algorithms and real-time data processing to achieve optimal fuel efficiency, emission levels, and drivability.

Fig. 1 is a system configuration diagram of a range extender control method according to an embodiment of the present application. As shown in FIG. 1, the system includes an extended range vehicle 100, the extended range vehicle 100 including a hybrid control system 101.

The hybrid control system 101 may obtain the state of charge of the extended range automobile 100 and the required power, where the required power is the driving power of the extended range automobile 100 plus the accessory power of the extended range automobile 100, start the range extender 100b when the required power is less than the battery discharge power of the extended range automobile 100 and the state of charge of the extended range automobile 100 satisfies the first state of charge, stop the range extender 100b when the required power is less than the battery discharge power of the extended range automobile 100 and the state of charge of the extended range automobile 100 satisfies the second state of charge, the second state of charge is greater than the first state of charge, obtain the start threshold when the required power is greater than the battery discharge power of the extended range automobile 100, start the range extender 100b when the required power is greater than the start threshold, and stop the range extender 100b when the required power is less than the start threshold.

Fig. 2 is a flowchart of a range extender control method according to an embodiment of the present application. The range extender control method may be executed by a hybrid control system of the range extender automobile, for example, the range extender automobile may be the range extender automobile 100 shown in fig. 1, and the hybrid control system may be the hybrid control system 101 shown in fig. 1. The above range extender control method may include step 210, step 220, step 230, step 240, step 250, and step 260, which are specifically implemented as follows:

step 210, obtaining the state of charge and the required power of the extended range automobile, wherein the required power is the driving power of the extended range automobile plus the accessory power of the extended range automobile.

The state of charge of the extended-range automobile is the proportion of the residual electric quantity of the power battery of the current extended-range automobile to the total capacity of the power battery, and the higher the state of charge is, the more sufficient the electric quantity of the power battery of the current extended-range automobile is, and the lower the state of charge is, the less the electric quantity of the power battery of the current extended-range automobile is.

In the embodiment of the application, the hybrid control system can acquire the state of charge of the extended range automobile through real-time monitoring.

The driving power of the extended-range automobile is the power required by the motor of the extended-range automobile when the automobile is driven to run.

The accessory power of the extended-range automobile refers to the power required by auxiliary equipment (such as an automobile air conditioner, an automobile sound and automobile navigation) except for a motor on the extended-range automobile.

In the embodiment of the application, the hybrid control system can calculate the required power of the current range-extending automobile by monitoring the running state and the speed of the automobile and the condition of the road on which the current automobile runs in real time.

Step 220, when the required power is smaller than the battery discharge power of the extended range automobile and the state of charge of the extended range automobile meets the first state of charge, starting the extended range device.

In the embodiment of the application, the hybrid power control system can monitor and acquire the battery discharge power of the extended-range automobile in real time.

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 level of charge of the power battery is sufficient to maintain the operation of the extended range vehicle.

In the embodiment of the application, when the required power of the extended-range automobile is smaller than the battery discharge power of the extended-range automobile, which means that the discharge capacity of the power battery of the current extended-range automobile can meet the automobile driving requirement and the whole automobile load requirement, the hybrid power control system compares the charge state of the extended-range automobile with the first charge state, and when the charge state of the extended-range automobile is smaller than the first charge state, the extended-range device is started, namely when the charge state of the extended-range automobile can not maintain the operation of the extended-range automobile, the hybrid power control system starts the extended-range device to generate power to maintain the normal running of the extended-range automobile.

And 230, stopping the range extender when the required power is smaller than the battery discharge power of the range-extending automobile and the state of charge of the range-extending automobile meets a second state of charge, wherein the second state of charge is larger than the first state of charge.

The second state of charge is a preset state of charge threshold higher than the first state of charge, and is a parameter used by the hybrid control system to ensure that the battery will not overdischarge, avoiding unnecessary engine start under the condition of sufficient electric quantity of the extended-range automobile.

In the embodiment of the application, when the required power of the extended-range automobile is smaller than the battery discharge power of the extended-range automobile, which means that the discharge capacity of the power battery of the current extended-range automobile can meet the automobile driving requirement and the whole automobile load requirement, the hybrid power control system compares the charge state of the extended-range automobile with the first charge state, and when the charge state of the extended-range automobile is smaller than the first charge state, the extended-range device is started, namely when the charge state of the extended-range automobile cannot maintain the operation of the extended-range automobile for a long time, the hybrid power control system starts the extended-range device to generate power to maintain the normal running of the extended-range automobile.

And 240, acquiring a start threshold under the condition that the required power is larger than the battery discharge power of the extended range automobile.

The start threshold is a preset power value of the required power of the range extender automobile, and is used for judging whether the range extender needs to be started.

In some embodiments, the hybrid control system may obtain a preset start-up threshold from the internal database when the demand power of the extended range vehicle exceeds the battery discharge power.

In other embodiments, when the demand power of the extended-range vehicle exceeds the battery discharge power, the hybrid control system may dynamically calculate and obtain the start-up threshold based on the parameter information (e.g., state of charge, battery state of health) of the current extended-range vehicle through a preset algorithm or model, which is an algorithm or model having the ability to generate the start-up threshold based on the state of charge and the battery state of health.

Step 250, starting the range extender under the condition that the required power is larger than the starting threshold.

In the embodiment of the application, when the required power of the whole vehicle is larger than the starting threshold, the required power of the current range-extending vehicle is higher, the energy generated by the power battery cannot meet the required power, and the range extender is started at the moment to provide additional power to ensure the normal operation of the range-extending vehicle.

And 260, stopping the range extender under the condition that the required power is smaller than the starting threshold.

In the embodiment of the application, when the required power of the whole vehicle is smaller than the starting threshold, the power requirement of the current whole vehicle is lower, and the energy generated by the power battery can meet the required power of the whole vehicle, so that the range extender is stopped.

In the embodiment of the application, the hybrid power control system of the range-extending automobile can acquire the charge state and the required power of the range-extending automobile in real time, the first charge state sets the lowest electric quantity limit for starting the range extender, the second charge state is used as a stop threshold, the charging phenomenon is prevented, the battery health is protected, the range extender can be timely started to supplement electric energy when the electric quantity of the whole automobile is insufficient based on the first charge state and the second charge state, the charging phenomenon is avoided, and further, the start threshold is introduced under the condition that the required power of the whole automobile exceeds the battery discharging capability, so that the hybrid power control system of the range-extending automobile can more accurately judge whether the range extender needs to be started or stopped based on the current working condition of the whole automobile.

Referring to fig. 3 with reference to fig. 2, fig. 3 is a flowchart of a range extender control method according to an embodiment of the application. Step 240 in fig. 2 may be implemented as step 240a and step 240b, as follows:

step 240a, obtaining the speed of the extended range automobile.

The vehicle speed is a speed of the vehicle during running, and is usually expressed in km/h or m/s.

In the embodiment of the application, the wheel speed sensor of the range-extended vehicle can continuously monitor the rotation speed of each wheel and transmit the vehicle speed to the hybrid control system through the vehicle-mounted network.

Step 240b, inquiring the corresponding relation among the state of charge, the vehicle speed and the starting threshold value of the extended range automobile through the state of charge and the vehicle speed of the extended range automobile, and acquiring the starting threshold value corresponding to the state of charge and the vehicle speed of the extended range automobile.

In the embodiment of the application, a database is arranged in the hybrid control system, the database stores the corresponding relations of the charge states, the vehicle speeds and the starting thresholds of different predefined extended range vehicles, and after the hybrid control system acquires the charge states and the vehicle speeds of the extended range vehicles, the database is queried to acquire the starting thresholds corresponding to the charge states and the vehicle speeds of the extended range vehicles.

In the embodiment of the application, when the whole vehicle required power of the extended range automobile exceeds the battery discharge power, the hybrid power control system queries the corresponding relation table of the charge state, the vehicle speed and the starting threshold value by combining the real-time charge state of the whole vehicle and the real-time vehicle speed, acquires the starting threshold value closest to the current state of the vehicle, and improves the accuracy of acquiring the starting threshold value.

Based on the foregoing aspects, in some embodiments, when the vehicle speed of the extended-range vehicle is less than a specified threshold, the hybrid control system of the extended-range vehicle starts the range extender when the state of charge of the extended-range vehicle is less than a first state of charge, and stops the range extender when the state of charge of the extended-range vehicle rises to a second state of charge.

In the embodiment of the application, when the range-extended automobile runs at a slower speed, the hybrid power control system continuously monitors the current state of charge of the automobile, when the current state of charge is lower than the first state of charge, the electric quantity of the current automobile is insufficient to maintain the normal operation of the automobile, at the moment, the hybrid power control system starts the range extender to acquire additional electric power, when the state of charge of the range-extended automobile rises to the second state of charge, the electric power reserve of the current range-extended automobile reaches a level capable of maintaining the normal running of the whole automobile, and the range extender is stopped to enable the automobile to recover a pure electric driving mode in order to prevent the battery from overdischarging.

In the embodiment of the application, when the vehicle speed is lower than the specified threshold value and the charge state is lower than the first charge state, the range extender is started, so that the range extender is ensured not to be excessively discharged in the state of low-speed running or frequent start and stop, necessary power reserve is maintained, the reduction of the range extender power performance caused by insufficient electric quantity can be effectively avoided, the reliability and driving safety of the range extender are ensured, the range extender is stopped in time when the charge state of the range extender is returned to the second charge state, the resource waste is avoided, and the range extender is started/stopped by setting different charge states so as to trigger the range extender, thereby improving the control efficiency of the range extender.

Based on the scheme shown in any one or more of the above embodiments, in some embodiments, the hybrid control system of the extended-range vehicle may further obtain an accelerator pedal opening of the extended-range vehicle, an ambient temperature at which the extended-range vehicle is located, an altitude at which the extended-range vehicle is located, and an atmospheric pressure, obtain a basic power generation, an ambient temperature correction coefficient, and an air pressure correction coefficient corresponding to the extended-range vehicle, respectively, based on the accelerator pedal opening of the extended-range vehicle, the ambient temperature at which the extended-range vehicle is located, the altitude at which the extended-range vehicle is located, and the atmospheric pressure, 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 extended-range vehicle, query a corresponding relationship between the target power generation and a motor speed, obtain a target speed corresponding to the target power generation, and control the extended-range vehicle to operate at the target speed.

The opening degree of the accelerator pedal refers to the speed of the driver of the extended range automobile for pressing the accelerator pedal, and the requirement of the driver on the acceleration of the vehicle can be indicated.

The above-mentioned ambient temperature refers to the air temperature of the environment where the extended range automobile is located, and the ambient temperature can affect the working efficiency of the engine and the battery of the extended range automobile.

The altitude and the atmospheric pressure determine the air density of the environment where the extended range automobile is currently located.

In the embodiment of the application, the hybrid control system can acquire the information through a sensor of the extended-range automobile, for example, the real-time opening of the current accelerator pedal position is acquired through an accelerator pedal position sensor, the ambient temperature is acquired through real-time detection of a temperature sensor, and the atmospheric pressure value of the current extended-range automobile is acquired through an air pressure sensor.

The basic generated power refers to the minimum generated power that the range extender should provide under ideal conditions.

The ambient temperature correction coefficient is a coefficient for correcting efficiency fluctuation caused by ambient temperature change of the extended range automobile.

The barometric pressure correction coefficient is a coefficient for compensating performance change caused by the difference of altitude and barometric pressure of the environment where the current extended range automobile is located.

In the embodiment of the application, the hybrid power control system of the extended-range automobile can acquire the environmental temperature correction coefficient and the air pressure correction coefficient by inquiring a pre-stored mapping table, and can also dynamically acquire the environmental temperature correction coefficient and the air pressure correction coefficient by combining the current accelerator pedal opening, the environmental temperature, the altitude and the atmospheric pressure through a built-in algorithm model.

The target generated power refers to electric energy output power which should be provided by the range extender under the current environmental conditions and driving requirements.

The target rotation speed is a rotation speed to be maintained by the range extender in order to achieve the target generated power.

In the embodiment of the application, after the hybrid power control system of the range extender automobile obtains the basic power generation, the ambient 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 of the range extender.

In the embodiment of the application, after the hybrid power control system obtains the target power generation power, a mapping table formed by the target power generation power and the motor rotation speed stored in the hybrid power control system can be queried, and the target rotation speed corresponding to the target power generation power is obtained through querying the target power generation power.

In the embodiment of the application, after the hybrid control system obtains the target rotating speed corresponding to the target generating power, a rotating speed setting signal is sent to the range extender to instruct the range extender to operate at the target rotating speed.

In the embodiment of the application, the hybrid power control system of the range-extending automobile can dynamically acquire the basic power generation, the ambient temperature correction coefficient and the air pressure correction coefficient according to the real-time accelerator pedal opening degree, the ambient temperature, the altitude and the atmospheric pressure information of the range-extending automobile, and acquire the target rotating speed based on the basic power generation, the ambient temperature correction coefficient and the air pressure correction coefficient, so that the range extender can operate at the target rotating speed under different ambient temperatures and altitudes, the optimal performance is maintained, and the control effect of the range extender is improved.

Based on the scheme shown in any one or more of the above embodiments, in some embodiments, the hybrid control system of the extended-range automobile queries the corresponding relation of the accelerator pedal opening, the vehicle speed and the basic power generation power of the extended-range automobile through the accelerator pedal opening and the vehicle speed of the extended-range automobile, obtains the basic power generation power of the extended-range automobile, queries the corresponding relation of the ambient temperature of the extended-range automobile, the charge state of the extended-range automobile and the ambient temperature correction coefficient through the ambient temperature of the extended-range automobile and the charge state of the extended-range automobile, obtains the ambient temperature correction coefficient of the extended-range automobile, and queries the corresponding relation of the altitude, the atmospheric pressure and the atmospheric pressure correction coefficient of the extended-range automobile through the altitude of the extended-range automobile.

In the embodiment of the application, the hybrid control system can be provided with a mapping table for storing the corresponding relation among the accelerator pedal opening, the vehicle speed and the basic power generation power of the extended-range automobile, and after the hybrid control system obtains the accelerator pedal opening and the vehicle speed of the extended-range automobile, the mapping table is queried to obtain the basic power generation power corresponding to the accelerator pedal opening and the vehicle speed of the extended-range automobile.

In the embodiment of the application, the hybrid control system can be provided with a mapping table for storing the corresponding relation among the ambient temperature of the extended range automobile, the charge state of the extended range automobile and the ambient temperature correction coefficient, and after the hybrid control system obtains the ambient temperature of the extended range automobile and the charge state of the extended range automobile, the mapping table is queried to obtain the ambient temperature correction coefficient of the extended range automobile.

In the embodiment of the application, the hybrid control system can be provided with a mapping table for storing the corresponding relation among the altitude, the atmospheric pressure and the air pressure correction coefficient of the range extender, and after the hybrid control system obtains the altitude and the atmospheric pressure of the range extender, the mapping table is queried to obtain the air pressure correction coefficient of the range extender.

In the embodiment of the application, the hybrid power control system queries the corresponding mapping table according to the current accelerator pedal opening and the vehicle speed of the range extender, acquires the basic power generation most in line with the current running requirement of the vehicle, effectively ensures the power output of the range extender, acquires the environmental temperature correction coefficient by combining the environmental temperature and the state of charge of the range extender, dynamically adjusts the power generation efficiency of the range extender, queries the air pressure correction coefficient according to the altitude and the atmospheric pressure information, and can optimize the working efficiency of the range extender under different altitudes and air pressure conditions through the air pressure correction coefficient, thereby avoiding performance fluctuation caused by air density change and effectively improving the control efficiency of the range extender.

Based on the scheme shown in any one or more of the above embodiments, in some embodiments, the hybrid control system of the range extender automobile obtains a target control torque corresponding to the target rotation speed by querying the corresponding relation between the target rotation speed and the control torque of the generator through the target rotation speed within a specified time period before the range extender is completely stopped, and controls the range extender to operate with the target control torque.

To explain in detail the method implementation steps described in the above patent claims, we can disassemble them into a series of specific operational flows. The method is mainly used for optimizing the operation efficiency of a range extender in a range-extending electric vehicle (REEV) immediately before stopping, and ensuring that the range extender works with the most suitable torque value, thereby maximizing the utilization of residual energy and smoothly transitioning to a stop state.

The specified duration is a predetermined duration before the range extender completely stops, and the working state of the range extender can be adjusted within the specified duration without affecting the performance of the range extender.

In the embodiment of the application, when the range extender enters a state to be stopped, the hybrid control system can acquire the target control torque corresponding to the target rotating speed by searching a mapping table after acquiring the target rotating speed, wherein the mapping table stores the corresponding relation between the target rotating speed and the control torque of the generator.

In the embodiment of the application, after the hybrid power control system acquires the target control torque, an operation instruction is sent to the range extender, wherein the operation instruction contains the target control torque so as to ensure that the range extender can operate with the target control torque.

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 designated time before the range extender is completely stopped, so that the problem of abrasion to hardware of the range extender caused by rapid stopping and bad user experience such as vehicle shake are avoided, the stability of the range extender in the stopping process is improved, the stopping stability of the range extender is effectively improved, and the control effect of the range extender is effectively improved.

Based on the steps in the embodiments of fig. 2 to 3, an embodiment of the present application shows an extended-range electric vehicle start-stop strategy and calibration method application. The specific contents are as follows:

1. a start-stop strategy and a calibration method of an extended range electric automobile mainly use calibration tools CANape, INCA and the like to modify calibration data and collect and analyze the data;

2. Setting a starting and stopping calibration target, collecting operation data of a test vehicle under various working conditions, establishing a starting and stopping strategy, verifying a real vehicle, optimizing and calibrating the starting and stopping strategy and the like;

3. Further, the vehicle defaults to an engine stop state, when the required power is greater than a starting threshold (calibratable), the engine is started, and when the required power is not greater than the starting threshold (calibratable), the engine is kept in the stop state, wherein the required power can be obtained by the required power of a driver (PedalMap times the vehicle speed), and the starting threshold can be obtained by the SOC and the vehicle speed;

4. Further, after the engine is started, when the required power is smaller than a shutdown threshold (calibratable), the engine starts a shutdown process and enters a shutdown state, otherwise, the engine continues to run, wherein the required power can be obtained by the required power (PedalMap times the vehicle speed) of a driver, and the shutdown threshold can be obtained by the SOC and the vehicle speed.

Referring to fig. 4, fig. 4 is a flow chart of start-stop strategy optimization and calibration according to an embodiment of the present application, which includes the following steps:

And 41, setting a start-stop target.

In the embodiment of the application, the computer equipment collects basic data, wherein the basic data comprise, but are not limited to, external characteristic scanning points of an engine, available discharge power scanning points of a multi-speed-section equal-speed cyclic discharge battery, power collection required by a driver under different accelerator pedal opening degrees, actual working load intensity of a range extender, power generation efficiency and the like.

And 42, basic data acquisition, and preliminary establishment of a start-stop strategy.

For example, please refer to fig. 5, fig. 5 is a schematic diagram of a start-stop strategy according to an embodiment of the present application, the strategy includes two judging steps:

And S1, judging whether the required power is larger than the starting power.

In the embodiment of the application, the default range extender is in a stop state, at the moment, the HCU judges whether the required power of the range extender automobile is larger than a starting threshold, the required power can be the required power of a driver, the starting threshold can be obtained by a charge state and the speed of the automobile, the engine in the range extender is started under the condition that the required power is larger than the starting threshold, and the engine in the range extender is not started under the condition that the required power is not larger than the starting threshold, so that the stop state is kept continuously.

And S2, judging whether the required power is smaller than a start-up threshold.

In the embodiment of the application, after the engine in the range extender is started, whether the required power is smaller than a stop threshold value is further judged, the stop threshold value can be obtained by a charge state and a vehicle speed, the HCU controls the range extender to enter the stop state under the condition that the required power is smaller than the stop threshold value, and the HCU starts the engine under the condition that the required power is not smaller than the stop threshold value.

And 43, verifying the real vehicle.

In the start-stop strategy, an SOC electric balance threshold is set, when the SOC is reduced to 12% in a power-free state of an extended range automobile, the engine is started naturally, when the SOC reaches 15%, the engine is started when the required power is larger than the start-stop threshold (SOC and a vehicle speed table lookup value and can be calibrated) in a power-free state of the extended range automobile, when the required power is smaller than the stop threshold (SOC and the vehicle speed table lookup value and can be calibrated), the engine starts a stop process, the engine enters a stop state, the SOC balance point is properly regulated under high-speed high-power requirement, and the actual automobile is verified based on the initially established start-stop strategy so as to perform initial bottom touch on the actual automobile.

And 44, starting and stopping strategy optimization and calibration.

In the embodiment of the application, idle power generation (parking power generation) is started and stopped, and power and rotating speed strategies are optimized and calibrated. When the SOC is lower than 12% (the set value), the engine in the extended range is automatically started, and when the SOC is increased to 15% (the set value), the engine is automatically stopped;

In the embodiment of the application, the idle power generation power is formed by the sum of idle power generation power points (calibration values) and high-voltage accessory power, and can be divided into three different power points of high, basic base and low, and can be used for calibrating parking power generation power, and one-dimensional table lookup and calibration of corresponding power generation rotating speed can be established according to power generation powers (required power) with different gradients.

In the embodiment of the application, the engine start-stop, power and rotating speed strategies are optimized and calibrated in the series operation mode, the current required power can be calculated according to the vehicle speed and the load, and different table lookup can be performed by different preset energy modes and driving modes.

In the embodiment of the application, a basic starting power point can be obtained by inquiring an engine starting power threshold table (a two-dimensional table of a meter display SOC and a vehicle speed), then a corrected starting power table is obtained through one-dimensional table lookup correction of a series of coefficients such as ambient temperature, different altitudes (calibratable), when the required power is larger than the corrected starting power point, the engine is started, otherwise, an engine stopping power threshold table is established, table lookup is performed, a series of corrections are performed to obtain a corrected stopping power table, when the required power is smaller than the corrected stopping power point, the engine is stopped, after starting is completed, the power generation power (calibratable) of a range extender foundation is obtained according to different accelerator pedal opening degrees and the vehicle speed table lookup, an ambient temperature correction coefficient (calibratable) is obtained according to the two-dimensional table lookup of the ambient temperature and the meter display SOC, an air pressure correction coefficient (calibratable) is obtained according to one-dimensional table lookup of different atmospheric pressures, the three are multiplied to obtain a target power generation power, and then the one-dimensional table lookup is performed based on the power to obtain a corresponding rotating speed value (calibratable) under the power generation power.

In some embodiments, the HCU may establish a shutdown assistance strategy. In order to ensure the stability of engine stopping, a stopping auxiliary strategy is established, the function is opened during stopping, stopping auxiliary time (calibratable) is set, for example, the stopping auxiliary time is set to be 2s, and during stopping, the torque control (calibratable) of the generator can be obtained according to different rotating speeds through table look-up.

And 45, judging whether the expected target is reached.

In the embodiment of the application, based on the start-stop strategy optimization, the real vehicle test is performed, if the expected target is reached, the strategy optimization and calibration tasks are completed, otherwise, the start-stop strategy and calibration data are required to be optimized again, and the real vehicle is verified, so that the process is repeated until the expected target is reached.

In the embodiment of the application, the extended range electric automobile start-stop strategy calibration method is applied, so that the electric automobile start-stop strategy can be optimized, the start-stop strategy optimization is performed based on the strategy schemes such as running, charging and discharging, energy utilization and the like of the new energy automobile, the energy utilization efficiency can be effectively improved, better driving experience is provided for users, and the product competitiveness is improved.

The above is only one embodiment of the present application and should not be construed as limiting the present application. Those skilled in the art will appreciate that various adaptations and modifications of the embodiments are possible in order to accommodate various application requirements. The scope of the application should, therefore, be determined with reference to the appended claims.

Referring to fig. 6, a block diagram of a range extender control device according to an exemplary embodiment of the present application is shown, where the data processing device may be implemented as all or part of a computer device by hardware or a combination of hardware and software, so as to implement all or part of the steps in the embodiments shown in fig. 2 to 3.

As shown in fig. 6, the range extender control device includes:

the information acquisition module 601 is configured to acquire a state of charge and a required power of the extended range automobile, where the required power is a driving power of the extended range automobile plus an accessory power of the extended range automobile;

the first starting module 602 is configured to start the range extender when the required power is less than the battery discharge power of the range extender, and the state of charge of the range extender meets the first state of charge;

The first stopping module 603 is configured to stop the range extender when the required power is less than the battery discharge power of the extended-range vehicle and the state of charge of the extended-range vehicle satisfies a second state of charge, where the second state of charge is greater than the first state of charge;

the start-up threshold value obtaining module 604 is configured to obtain a start-up threshold value when the required power is greater than the battery discharge power of the extended range automobile;

A second starting module 605, configured to start the range extender when the required power is greater than the start threshold;

The second stopping module 606 is configured to stop the range extender when the required power is less than the start-up threshold.

In some embodiments, the start-up threshold obtaining module 604 is configured to obtain a vehicle speed of the extended range vehicle, and to query a corresponding relationship between the state of charge, the vehicle speed and the start-up threshold of the extended range vehicle by using the state of charge and the vehicle speed of the extended range vehicle to obtain a start-up threshold corresponding to the state of charge and the vehicle speed of the extended range vehicle.

In some embodiments, the apparatus further comprises:

A first information obtaining module 601, configured to obtain an accelerator opening of the extended range automobile, an ambient temperature where the extended range automobile is located, an altitude where the extended range automobile is located, and an atmospheric pressure;

the second information obtaining module 601 is configured to obtain a basic power generation, an ambient temperature correction coefficient, and an air pressure correction coefficient corresponding to the range extender, based on an accelerator opening of the range extender, an ambient temperature of the range extender, an altitude of the range extender, and an air pressure, respectively;

The target power generation power acquisition module is used for acquiring the product of the basic power generation power, the ambient temperature correction coefficient and the air pressure correction coefficient to serve as the target power generation power of the range extender;

The target rotating speed acquisition module is used for inquiring the corresponding relation between the target generating power and the rotating speed of the motor through the target generating power to acquire the target rotating speed corresponding to the target generating power;

the first operation module is used for controlling the range extender to operate at a target rotating speed.

In some embodiments, the second information obtaining module 601 is configured to obtain the basic power of the range extender by querying a corresponding relationship between an accelerator pedal opening and a vehicle speed of the range extender, and the basic power of the range extender, and obtain an environmental temperature correction coefficient of the range extender by querying a corresponding relationship between an environmental temperature of the range extender and a state of charge of the range extender, and an environmental temperature correction coefficient of the range extender, and obtain an air pressure correction coefficient of the range extender by querying a corresponding relationship between an altitude of the range extender and an atmospheric pressure.

In some embodiments, the apparatus further comprises:

the target control torque acquisition module is used for inquiring the corresponding relation between the target rotating speed and the control torque of the generator through the target rotating speed in a designated time period before the range extender completely stops, and acquiring the target control torque corresponding to the target rotating speed;

Referring to fig. 7, fig. 7 is a schematic structural diagram of a computer device according to an exemplary embodiment of the present application. The computer device 700 includes a central processing unit (Central Processing Unit, CPU) 701, a system Memory 704 including a random access Memory (Random Access Memory, RAM) 702 and a Read-Only Memory (ROM) 703, and a system bus 705 connecting the system Memory 704 and the central processing unit 701. The computer device 700 also includes a basic input/output system (Input Output System, I/O system) 706, which helps to transfer information between various devices within the computer, and a mass storage device 707 for storing an operating system 713, application programs 714, and other program modules 715.

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 a user to input information. Wherein both the display 708 and the input device 709 are coupled to the central processing unit 701 through an input/output controller 710 coupled to the system bus 705. The basic input/output system 706 may also include an input/output controller 710 for receiving and processing input from a number of other devices, such as a keyboard, mouse, or electronic stylus. Similarly, input/output controller 710 also provides output to a display screen, a printer, or other type of output device.

The mass storage device 707 is connected to the central processing unit 701 through a mass storage controller (not shown) 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 may include a computer readable medium (not shown) such as a hard disk or CD-ROM (Compact Disc Read-Only Memory) drive.

Computer readable media may include computer storage media and communication media without loss of generality. Computer storage media includes volatile and nonvolatile, 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 RAM (Random Access Memory ), ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (ELECTRICALLY ERASABLE PROGRAMMABLE READ-Only Memory), flash Memory or other solid state Memory technology, CD-ROM, DVD (Digital Video Disc, high density digital video disc) or other optical 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 are not limited to the ones described above. The system memory 704 and mass storage device 707 described above may be collectively referred to as memory.

The computer device 700 may be connected to the internet or other network device through a network interface unit 711 connected to the system bus 705.

The memory further includes one or more programs, one or more programs being stored in the memory, and the central processing unit 701 implements all or part of the steps of the methods shown in fig. 2 to 4 by executing the one or more programs.

In an exemplary embodiment, a chip is also provided, the chip comprising programmable logic circuits and/or program instructions for implementing all or part of the steps of the methods shown in the various embodiments of the application described above when the chip is run on a computer device.

In an exemplary embodiment, a computer program product is also provided, the computer program product comprising 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 methods shown in the various embodiments of the present application described above.

In an exemplary embodiment, a computer readable storage medium is also provided, in which a computer program is stored, which 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 application.

Those of ordinary skill in the art will appreciate that all or a portion of the steps implementing the above embodiments may be implemented by hardware, or may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, where the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The foregoing is illustrative of the present application and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., which fall within the spirit and principles of the present application.

Claims

1. A range extender control method, wherein the method is performed by a hybrid control system of a range-extending vehicle, the method comprising:

2. The method of claim 1, wherein the obtaining the start-up threshold if the required power is greater than a battery discharge power of the extended range automobile comprises:

Acquiring the speed of the extended range automobile;

And inquiring the corresponding relation among the state of charge of the extended range automobile, the speed of the automobile and the starting threshold value through the state of charge of the extended range automobile and the speed of the automobile, and acquiring the starting threshold value corresponding to the state of charge of the extended range automobile and the speed of the automobile.

3. The method of claim 2, wherein when the vehicle speed is less than a specified threshold, the method further comprises:

when the charge state of the range-extending automobile is smaller than the first charge state, starting the range extender;

and stopping the range extender when the charge state of the range-extending automobile rises to the second charge state.

4. The method according to claim 1, wherein the method further comprises:

Acquiring the accelerator pedal opening of the extended-range automobile, the ambient temperature of the extended-range automobile, the altitude of the extended-range automobile and the atmospheric pressure;

Based on the accelerator pedal opening of the range-extending automobile, the ambient temperature of the range-extending automobile, the altitude of the range-extending automobile and the atmospheric pressure, respectively acquiring basic power generation, an ambient temperature correction coefficient and an atmospheric pressure correction coefficient corresponding to the range extender;

obtaining the product of the basic power generation, the ambient temperature correction coefficient and the air pressure correction coefficient as the target power generation of the range extender;

inquiring the corresponding relation between the target power generation power and the motor rotating speed through the target power generation power to obtain a target rotating speed corresponding to the target power generation power;

and controlling the range extender to run at the target rotating speed.

5. The method of claim 4, wherein the obtaining the basic power generation, the ambient temperature correction factor, and the air pressure correction factor corresponding to the range extender based on the accelerator opening of the range extender, the ambient temperature of the range extender, the altitude of the range extender, and the air pressure, respectively, comprises:

Inquiring the corresponding relation among the accelerator pedal opening of the range-extending automobile, the vehicle speed and the basic power generation power through the accelerator pedal opening of the range-extending automobile and the vehicle speed, and acquiring the basic power generation power of the range extender;

Inquiring the corresponding relation among the environment temperature of the extended range automobile, the charge state of the extended range automobile and the environment temperature correction coefficient by the environment temperature of the extended range automobile and the charge state of the extended range automobile, and obtaining the environment temperature correction coefficient of the extended range device;

And inquiring the corresponding relation among the altitude, the atmospheric pressure and the air pressure correction coefficient of the range extender according to the altitude and the atmospheric pressure of the range extender automobile, and obtaining the air pressure correction coefficient of the range extender.

6. The method according to any of claims 4 or 5, wherein the method further comprises:

Inquiring the corresponding relation between the target rotating speed and the control torque of the generator through the target rotating speed within a designated time before the range extender completely stops, and obtaining the target control torque corresponding to the target rotating speed;

and controlling the range extender to operate with the target control torque.

7. A range extender control device, the device comprising:

8. A computer device comprising a processor and a memory having instructions stored therein, the instructions being executable by the processor to implement the range extender control method of any one of claims 1 to 6.

9. A computer-readable storage medium having instructions stored therein, the instructions being executable by a processor of a computer device to implement the range extender control method of any one of claims 1 to 6.

10. A computer program product, characterized in that it comprises computer instructions stored in a computer-readable storage medium, which are read and executed by a processor of a computer device for implementing the range extender control method according to any one of claims 1 to 6.