An Extended-Range Electric Vehicle Energy Management Method and System Incorporating Navigation Information

Abstract

This application relates to a range-extended vehicle energy management method and system combined with navigation information. The road information includes road altitude change information, road speed limit information, and road length in the future driving section obtained by navigating according to the vehicle driving destination. Based on the road information, the total vehicle energy consumption required for the future driving section is calculated. Based on the total vehicle energy consumption and the road information, and combined with the real-time SOC value of the vehicle battery, an energy management strategy is obtained. Combining the navigation map information, the total vehicle energy consumption required for driving is calculated, and then, combined with the remaining battery power, it can be specifically known whether power generation is required in the corresponding different driving sections and the required power generation amount, so that the working power of the range extender is close to the actual driving demand value of the vehicle in different sections, enabling the energy output by the range extender to directly enter the drive motor maximally, reducing the loss of charging and discharging the battery, thereby improving the energy utilization rate of the range-extended vehicle and enhancing fuel economy.

Description

Technical Field

[0001] This application relates to the technical field of new energy vehicles, and particularly to an extended-range vehicle energy management method and system that combines navigation information. Background Art

[0002] In an extended-range electric vehicle, the start and stop of the range extender mainly depend on the state of charge of the power battery. When the state of charge of the power battery reaches a set high value, the range extender stops generating electricity, and the vehicle runs in pure electric mode; when the state of charge of the power battery drops to a set low value, the range extender starts generating electricity to charge the power battery and also supply power to the drive motor. When the range extender is working, the engine obtains mechanical energy by fuel combustion, and the mechanical energy is input to the high-voltage generator and converted into electrical energy through the motor system. This electrical energy is stored in energy storage components such as batteries and then supplies power to the drive motor.

[0003] The range extender generally works at a fixed power, but the power demand of the whole vehicle generally does not equal the output power of the range extender. When the output power of the range extender is greater than the power required for vehicle driving, the extra electricity generated by the range extender charges the battery. When the output power of the range extender is less than the power demand of the vehicle, the battery will output power for power compensation to ensure that the output power of the power system meets the vehicle driving requirements. However, since both charging and discharging will cause energy losses, frequent battery charging and discharging will increase the energy consumption of the extended-range electric vehicle. Summary of the Invention

[0004] The embodiments of this application provide an extended-range vehicle energy management method and system that combines navigation information to solve the problem in the related art that both charging and discharging will cause energy losses, and frequent battery charging and discharging will increase the energy consumption of the extended-range electric vehicle.

[0005] In the first aspect, an extended-range hybrid vehicle energy management method that combines navigation information is provided, which includes:

[0006] Obtain road information; the road information includes the road altitude change information, road speed limit information, and road length in the future driving section obtained by navigating according to the vehicle driving destination;

[0007] Based on the road information, calculate the total vehicle energy consumption required for the future driving section;

[0008] Based on the total vehicle energy consumption and the road information, and in combination with the real-time SOC value of the vehicle battery, obtain an energy management strategy.

[0009] In some embodiments, calculating the total vehicle energy consumption required for the future driving section based on the road information includes the following steps:

[0010] Calculate the air resistance on the vehicle according to the road speed limit information, combined with the cross-sectional area and drag coefficient of the vehicle; obtain the frictional resistance, and then calculate the driving resistance of the vehicle based on the air resistance;

[0011] Calculate the energy consumption caused by the change in vehicle altitude according to the road altitude change information and combined with the vehicle mass;

[0012] Calculate the total energy consumption required for the future driving section of the vehicle according to the driving resistance of the vehicle, the energy consumption caused by the change in vehicle altitude, and the length of the road.

[0013] In some embodiments, obtaining the frictional resistance includes the following steps:

[0014] Take a photo of the road surface to obtain the road surface type; obtain the corresponding frictional resistance in the frictional resistance database according to the road surface type; the frictional resistance database includes the frictional resistance when the vehicle travels on various road surface types.

[0015] In some embodiments, based on the total energy consumption of the vehicle and the road information, and combined with the real-time SOC value of the vehicle battery, an energy management strategy is obtained, including the following steps:

[0016] Calculate the remaining effective energy of the battery according to the real-time SOC value of the vehicle battery, combined with the SOC value for starting the range extender, the set total battery power, and the battery energy conversion efficiency;

[0017] According to the set rules, perform the following analysis on the real-time SOC value of the vehicle battery, the SOC value for starting the range extender, and the remaining effective energy of the battery to obtain the energy management strategy:

[0018] If the real-time SOC value of the vehicle battery is greater than the SOC value for starting the range extender, and the remaining effective energy of the battery is greater than the total energy consumption of the vehicle, the range extender does not start;

[0019] If the real-time SOC value of the vehicle battery is greater than or equal to the SOC value for starting the range extender, and the remaining effective energy of the battery is less than or equal to the total energy consumption of the vehicle, obtain the difference between the remaining effective energy of the battery and the total energy consumption of the vehicle, and use this difference as the first target power generation amount of the range extender for power generation;

[0020] If the real-time SOC value of the vehicle battery is less than the SOC value for starting the range extender, enter the low-power generation mode.

[0021] In some embodiments, if the real-time SOC value of the vehicle battery is less than the SOC value for starting the range extender, entering the low-power generation mode includes the following steps:

[0022] When the real-time SOC value of the vehicle battery is less than the SOC value for starting the range extender, calculate the absolute value of the difference between the two;

[0023] If the absolute value is less than the set threshold, calculate the driving time based on the road speed limit information and the road length, and then obtain the first target power of the range extender using the total vehicle energy consumption and the driving time, and operate the range extender in the future driving section at the first target power;

[0024] If the absolute value is greater than the set threshold, calculate the second target power generation according to the real-time SOC value, the SOC value at which the range extender is turned on, the set total battery power, and the battery charging efficiency; then calculate the driving time based on the road speed limit information and the road length; obtain the second target power of the range extender according to the driving time, the second target power generation, and the total vehicle energy consumption, and operate the range extender in the future driving section at the second target power.

[0025] The calculation formula for the second target power generation is: Second target power generation = Total vehicle energy consumption + (SOC value at which the range extender is turned on - Real-time SOC value) * Set total battery power * Battery charging efficiency.

[0026] In some embodiments, the range extender is designed with multiple fixed power generation levels; the multiple fixed power generation levels increase in sequence;

[0027] If the first target power is between two adjacent fixed power generation levels, first operate the range extender at the lower of the two adjacent fixed power generation levels for the first set time; then operate the range extender at the higher fixed power generation level for the second set time;

[0028] If the second target power is between two adjacent fixed power generation levels, first operate the range extender at the lower of the two adjacent fixed power generation levels for the first set time; then operate the range extender at the higher fixed power generation level for the second set time.

[0029] In some embodiments, the calculation formula for the first set time is:

[0030] Ratio of the first set time = (Higher of the two adjacent fixed power generation levels - First target power) / (Higher of the two adjacent fixed power generation levels - Lower of the two adjacent fixed power generation levels);

[0031] First set time = Driving time × Ratio of the first set time;

[0032] The calculation formula for the first set time is: Second set time = Driving time - First set time.

[0033] In some embodiments, according to the real-time SOC value of the vehicle battery, and in combination with the SOC value at which the range extender is turned on, the set total battery power, and the battery energy conversion efficiency, the formula for calculating the remaining effective energy of the battery is:

[0034] Remaining effective energy of the battery = (Real-time SOC value - SOC value at which the range extender is turned on) * Set total battery capacity * Battery energy conversion efficiency.

[0035] In a second aspect, a range-extended hybrid vehicle energy management system combined with navigation information is provided, which includes:

[0036] A first module for obtaining road information; the road information includes information on changes in road altitude, road speed limits, and road lengths in future driving sections obtained by navigating according to the vehicle's driving destination.

[0037] A second module for calculating the total vehicle energy consumption required for a future driving section based on the road information.

[0038] A third module for obtaining an energy management strategy based on the total vehicle energy consumption and the road information, and in combination with the real-time SOC value of the vehicle battery.

[0039] In a third aspect, a computer-readable storage medium is provided, on which a computer program is stored, and the program is executed by a processor to implement a range-extended hybrid vehicle energy management method combined with navigation information.

[0040] The beneficial effects brought by the technical solution provided in this application include:

[0041] The embodiments of this application provide a range-extended vehicle energy management method and system combined with navigation information. Since the road information includes information on changes in road altitude, road speed limits, and road lengths in future driving sections obtained by navigating according to the vehicle's driving destination; based on the road information, the total vehicle energy consumption required for a future driving section is calculated; based on the total vehicle energy consumption and the road information, and in combination with the real-time SOC value of the vehicle battery, an energy management strategy is obtained; the above steps combine navigation map information to optimize the start-up strategy of the range extender of the range-extended electric vehicle, calculate the total vehicle energy consumption required for driving according to the map information, and then specifically know whether power generation is required and the required power generation amount under corresponding different driving sections in combination with the remaining battery power, so that the working power of the range extender is close to the actual driving demand value of the vehicle in different sections, enabling the energy output by the range extender to directly enter the drive motor maximally, reducing the loss of charging and discharging the battery, and maximizing the utilization of energy to improve the energy utilization rate of the range-extended vehicle and improve fuel economy. Description of the Drawings

[0042] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0043] Figure 1 It is a schematic flowchart of the general process of the extended-range vehicle energy management method for navigation information provided by the embodiments of the present application. Specific implementation manners

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0045] The embodiments of the present application provide an extended-range vehicle energy management method and system combined with navigation information to solve the problem that both charging and discharging will cause energy loss in the related art, and frequent battery charging and discharging will increase the energy consumption of extended-range electric vehicles.

[0046] Please refer to Figure 1 , an extended-range hybrid vehicle energy management method combined with navigation information, which includes the following steps:

[0047] Step S01: Obtain road information; the road information includes the road altitude change information, road speed limit information, and road length in the future driving section obtained by navigating according to the vehicle driving destination; the future driving section refers to the distance from the starting point to the ending point on the navigation map.

[0048] Step S02: Based on the road information, calculate the total vehicle energy consumption required for the future driving section;

[0049] Step S03: Based on the total vehicle energy consumption and road information, and combined with the real-time SOC value of the vehicle battery, obtain an energy management strategy.

[0050] Through the above steps, since the road information includes the road altitude change information, road speed limit information, and road length in the future driving section obtained by navigating according to the vehicle driving destination; based on the road information, the total vehicle energy consumption required for the future driving section is calculated; based on the total vehicle energy consumption and road information, and combined with the real-time SOC value of the vehicle battery, an energy management strategy is obtained; the above steps are combined with the navigation map information to optimize the starting strategy of the range extender of the range-extended electric vehicle, calculate the total vehicle energy consumption required for driving according to the map information, and then combined with the remaining battery power, it can be specifically known whether power generation is required and the required power generation amount under different corresponding driving sections, so that the working power of the range extender is close to the actual driving demand value of the vehicle in different sections, enabling the energy output by the range extender to directly enter the drive motor maximally, reducing the loss of charging and discharging the battery, and maximizing the utilization of energy to improve the energy utilization rate of the range-extended vehicle and improve fuel economy.

[0051] In some preferred embodiments, step S02, based on the road information, calculate the total vehicle energy consumption required for the future driving section; specifically includes the following steps:

[0052] Step S020, according to the road speed limit information, and combined with the vehicle cross-sectional area and wind resistance coefficient, calculate the air resistance received by the vehicle; obtain the frictional resistance, and then calculate the vehicle driving resistance based on the air resistance;

[0053] Step S021, according to the road altitude change information and combined with the vehicle mass, calculate the energy consumption caused by the vehicle altitude change;

[0054] Step S022, according to the vehicle driving resistance, the energy consumption caused by the vehicle altitude change, and the road length, calculate the total vehicle energy consumption required for the future driving section.

[0055] In the above steps, the total vehicle energy consumption = vehicle driving resistance * road length + energy consumption caused by vehicle altitude change. Vehicle driving resistance = air resistance received by the vehicle + frictional resistance.

[0056] The calculation formula for the air resistance Fw is: Fw = 1 / 2ρ·A·Cw·v^2 (kg), where: v is the driving speed, unit: m / s; A is the vehicle cross-sectional area, unit: m2; Cw is the wind resistance coefficient. v takes the speed limit value of this section. The energy consumption caused by vehicle altitude change = vehicle altitude change * vehicle mass, where the value is positive when the vehicle altitude rises and negative when the vehicle altitude drops.

[0057] Further, in step S020, obtaining the frictional resistance includes the following steps: photographing the road surface to obtain the road surface type; obtaining the corresponding frictional resistance in the frictional resistance database according to the road surface type; the frictional resistance database includes the frictional resistance when the vehicle travels on various road surface types.

[0058] In some preferred embodiments, step S03, based on the total vehicle energy consumption and road information, and combined with the real-time SOC value of the vehicle battery, derives an energy management strategy, including the following steps:

[0059] Step S030, according to the real-time SOC value of the vehicle battery, and combined with the extender turning-on SOC value, the set total battery power, and the battery energy conversion efficiency, calculates the remaining effective energy of the battery;

[0060] Step S031, according to the set rules, performs the following analysis on the real-time SOC value of the vehicle battery, the extender turning-on SOC value, and the remaining effective energy of the battery to obtain an energy management strategy:

[0061] Step S032, if the real-time SOC value of the vehicle battery is greater than the extender turning-on SOC value, and the remaining effective energy of the battery is greater than the total vehicle energy consumption, then the extender does not start; the remaining effective energy of the battery = (real-time SOC value - extender turning-on SOC value) * set total battery power * battery energy conversion efficiency. Since the remaining battery power is sufficient to drive the vehicle to complete the driving of this section of the road and there is no need for the extender to intervene to provide energy, the extender can be kept turned off all the time when driving this section of the road.

[0062] Step S033, if the real-time SOC value of the vehicle battery is greater than or equal to the extender turning-on SOC value, and the remaining effective energy of the battery is less than or equal to the total vehicle energy consumption, then obtain the difference between the remaining effective energy of the battery and the total vehicle energy consumption, and use this difference as the first target power generation amount of the extender to generate electricity; the remaining effective energy of the battery < the total vehicle energy consumption within this section of the road. In this working condition, the battery power is not enough to support the vehicle to complete the driving of this section of the mileage, and the extender needs to intervene to provide the energy required for driving. In this kind of working condition, the extender intervenes to work, and the power generation power of the extender is selected as the power generation power with the highest energy efficiency. The first target power generation amount = the total vehicle energy consumption within this section of the road - the remaining effective energy of the battery.

[0063] Step S034, if the real-time SOC value of the vehicle battery is less than the extender turning-on SOC value, then enter the low-power generation mode.

[0064] Further, step S034 specifically includes: when the real-time SOC value of the vehicle battery is less than the extender turning-on SOC value, calculate the absolute value of the difference between the two.

[0065] If the absolute value is less than the set threshold, the driving time is calculated based on the road speed limit information and the road length, and then the first target power of the range extender is obtained by using the total vehicle energy consumption and the driving time, and the range extender is operated at the first target power in the future driving section; the first target power of the range extender = the total vehicle energy consumption in this section / the driving time of this section, and the driving time of this section = S / v. To ensure the working efficiency of the range extender, generally multiple fixed power generation powers, P1, P2……,Pn, are designed for the range extender, where P1 < P2 < …… < Pn. Assume that P1 < the first target power of the range extender < P2, then the power generation strategy of the range extender is to generate power at the small power P1 first, and then at P2. Assume that the time proportion of generating power at P1 in this section of the journey is k, then k = (P2 - the target power of the range extender) / (P2 - P1).

[0066] If the absolute value is greater than the set threshold, the second target power generation amount is calculated based on the real-time SOC value, the SOC value at which the range extender is turned on, the set total power and the battery charging efficiency; then the driving time is calculated based on the road speed limit information and the road length; the second target power of the range extender is obtained based on the driving time, the second target power generation amount and the total vehicle energy consumption, and the range extender is operated at the second target power in the future driving section. The target power of the range extender = (the total vehicle energy consumption in this section + the power generation amount) / the driving time of this section. The calculation formula for the second target power generation amount is: the second target power generation amount = the total vehicle energy consumption + (the SOC value at which the range extender is turned on - the real-time SOC value) * the set total power of the battery * the battery charging efficiency; assume that P1 < the target power of the range extender < P2, then the power generation strategy of the range extender is to generate power at the small power P2 first, and then at P1. Assume that the time proportion of generating power at P1 in this section of the journey is k, then k = (P2 - the second target power of the range extender) / (P2 - P1). Among them, the set threshold can be calibrated according to the actual situation. For example, when the SOC value at which the range extender is turned on is 20%, the set threshold is 5%. When the real-time SOC value is 17%, the absolute value is less than the set threshold. When the real-time SOC value is 14%, the absolute value is greater than the set threshold, so as to further subdivide different power generation requirements and make the range extender operate in the most effective and appropriate way.

[0067] It should be understood as above that the range extender is designed with multiple fixed power generation powers; the multiple fixed power generation powers increase in sequence;

[0068] If the first target power is between two adjacent fixed power generation powers, first operate the range extender at the smaller of the two adjacent fixed power generation powers for the first set time; then operate the range extender at the larger fixed power generation power for the second set time;

[0069] If the second target power is between two adjacent fixed power generation powers, first operate the range extender at the smaller of the two adjacent fixed power generation powers for a first set time; then operate the range extender at the larger fixed power generation power for a second set time.

[0070] The calculation formula for the first set time is: First set time ratio = (the larger of the two adjacent fixed power generation powers - the first target power) / (the larger of the two adjacent fixed power generation powers - the smaller of the two adjacent fixed power generation powers);

[0071] The first set time = driving time × first set time ratio; The calculation formula for the second set time is: The second set time = driving time - the first set time.

[0072] This application also proposes a range-extended hybrid vehicle energy management system combined with navigation information, which includes:

[0073] A first module, which is used to obtain road information; The road information includes the road altitude change information, road speed limit information, and road length in the future driving section obtained by navigating according to the vehicle driving destination.

[0074] A second module, which is used to calculate the total vehicle energy consumption required for the future driving section based on the road information.

[0075] A third module, which is used to obtain an energy management strategy based on the total vehicle energy consumption, road information, and in combination with the real-time SOC value of the vehicle battery.

[0076] A computer-readable storage medium, on which a computer program is stored, and the program is executed by a processor to be used to implement a range-extended hybrid vehicle energy management method combined with navigation information. The present invention combines navigation map information to optimize the start-up strategy of the range extender of a range-extended electric vehicle, estimates the average power during driving according to the map information, makes the operating power of the range extender close to the required value of vehicle driving, enables the energy output by the range extender to directly enter the drive motor maximally, reduces the loss of charging and discharging the battery, and maximally utilizes the energy to improve the energy utilization rate of the range-extended vehicle and improve fuel economy.

[0077] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) that contain computer-usable program code.

[0078] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices produce means for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0079] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means that implement the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks.

[0080] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or combinations of blocks. In a typical configuration, a computing device includes one or more processors (CPUs), an input / output interface, a network interface, and a memory. The memory may include non-permanent memory in the computer-readable medium, in the form of random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0081] A computer-readable medium includes both permanent and non-permanent, removable and non-removable media and can implement information storage by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data.

[0082] Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media such as modulated data signals and carrier waves. It should also be noted that the term "comprising," "including," or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0083] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper," "lower," etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. Unless otherwise expressly specified and defined, the terms "mounted," "connected," and "coupled" should be construed broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0084] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0085] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An energy management method for a range-extended hybrid electric vehicle combined with navigation information, characterized in that It includes: Obtain road information; the road information includes road altitude change information, road speed limit information, and road length in the future driving section obtained by navigating according to the vehicle driving destination; Based on the road information, calculate the total vehicle energy consumption required for the future driving section; Based on the total vehicle energy consumption and the road information, and combined with the real-time SOC value of the vehicle battery, obtain an energy management strategy; The energy management strategy includes that if the real-time SOC value of the vehicle battery is less than the extender start SOC value, enter the low-power generation mode. This step is specifically as follows: When the real-time SOC value of the vehicle battery is less than the extender start SOC value, calculate the absolute value of the difference between the two; If the absolute value is less than the set threshold, calculate the driving time according to the road speed limit information and the road length, and then obtain the first target power of the extender by using the total vehicle energy consumption and the driving time, and operate the extender in the future driving section at the first target power; If the absolute value is greater than the set threshold, calculate the second target power generation according to the real-time SOC value, the extender start SOC value, the set total power and the battery charging efficiency; then calculate the driving time according to the road speed limit information and the road length; Obtain the second target power of the extender according to the driving time, the second target power generation and the total vehicle energy consumption, and operate the extender in the future driving section at the second target power; The calculation formula for the second target power generation is: Second target power generation = Total vehicle energy consumption + (Extender start SOC value - Real-time SOC value) * Battery set total power * Battery charging efficiency.

2. The energy management method for a range-extended hybrid electric vehicle incorporating navigation information according to claim 1, wherein Based on the road information, calculate the total vehicle energy consumption required for the future driving section, including the following steps: According to the road speed limit information, and combined with the vehicle cross-sectional area and the wind resistance coefficient, calculate the air resistance received by the vehicle; obtain the frictional resistance, and then calculate the vehicle driving resistance based on the air resistance; According to the road altitude change information and combined with the vehicle mass, calculate the energy consumption caused by the vehicle altitude change; According to the vehicle driving resistance, the energy consumption caused by the vehicle altitude change and the road length, calculate the total vehicle energy consumption required for the future driving section.

3. The energy management method for a range-extended hybrid electric vehicle integrating navigation information according to claim 2, wherein, Obtaining the frictional resistance includes the following steps: Take a picture of the road surface to obtain the road surface type; obtain the corresponding frictional resistance in the frictional resistance database according to the road surface type; the frictional resistance database includes the frictional resistance when the vehicle is driving on various road surface types.

4. The energy management method for a range-extended hybrid electric vehicle incorporating navigation information according to claim 1, wherein Based on the total vehicle energy consumption and the road information, and combined with the real-time SOC value of the vehicle battery, obtain an energy management strategy, including the following steps: According to the real-time SOC value of the vehicle battery, and combined with the extender start SOC value, the battery set total power and the battery energy conversion efficiency, calculate the remaining effective energy of the battery; According to the set rules, perform the following analysis on the real-time SOC value of the vehicle battery, the extender start SOC value and the remaining effective energy of the battery to obtain an energy management strategy: If the real-time SOC value of the vehicle battery is greater than the extender start SOC value, and the remaining effective energy of the battery is greater than the total vehicle energy consumption, the extender does not start; If the real-time SOC value of the vehicle battery is greater than or equal to the extended-range generator starting SOC value, and the remaining available energy of the battery is less than or equal to the total vehicle energy consumption, then obtain the difference between the remaining available energy of the battery and the total vehicle energy consumption, and use this difference as the first target power generation amount of the extended-range generator for power generation.

5. The extended-range hybrid vehicle energy management method combining navigation information according to claim 1, characterized in that: The extended-range generator is designed with multiple fixed power generation powers; the multiple fixed power generation powers increase in sequence; If the first target power is between two adjacent fixed power generation powers, first operate the extended-range generator at the smaller of the two adjacent fixed power generation powers for a first set time; then operate the extended-range generator at the larger fixed power generation power for a second set time; If the second target power is between two adjacent fixed power generation powers, first operate the extended-range generator at the smaller of the two adjacent fixed power generation powers for a first set time; then operate the extended-range generator at the larger fixed power generation power for a second set time.

6. The extended-range hybrid vehicle energy management method combining navigation information according to claim 5, characterized in that: The calculation formula for the first set time is: First set time ratio = (the larger of the two adjacent fixed power generation powers - the first target power) / (the larger of the two adjacent fixed power generation powers - the smaller of the two adjacent fixed power generation powers); First set time = driving time × first set time ratio; The calculation formula for the first set time is: Second set time = driving time - first set time.

7. The extended-range hybrid vehicle energy management method combining navigation information according to claim 4, characterized in that: According to the real-time SOC value of the vehicle battery, and in combination with the extended-range generator starting SOC value, the set total battery power, and the battery energy conversion efficiency, the formula for calculating the remaining available energy of the battery is: Remaining available energy of the battery = (real-time SOC value - extended-range generator starting SOC value) * set total battery power * battery energy conversion efficiency.

8. An extended-range hybrid vehicle energy management system combined with navigation information, characterized in that, It includes: A first module, which is used to obtain road information; the road information includes the road altitude change information, road speed limit information, and road length in the future driving section obtained by navigating according to the vehicle driving destination; A second module, which is used to calculate the total vehicle energy consumption required for the future driving section based on the road information; The third module is used to obtain an energy management strategy based on the total vehicle energy consumption and the road information, and in combination with the real-time SOC value of the vehicle battery; the energy management strategy includes that if the real-time SOC value of the vehicle battery is less than the range extender activation SOC value, it enters the low-power generation mode. The specific steps are as follows: when the real-time SOC value of the vehicle battery is less than the range extender activation SOC value, calculate the absolute value of the difference between the two; if the absolute value is less than the set threshold, calculate the driving time according to the road speed limit information and the road length, and then obtain the first target power of the range extender by using the total vehicle energy consumption and the driving time, and operate the range extender at the first target power in the future driving section; if the absolute value is greater than the set threshold, calculate the second target power generation amount according to the real-time SOC value, the range extender activation SOC value, the set total battery power and the battery charging efficiency; then calculate the driving time according to the road speed limit information and the road length; Obtain the second target power of the range extender according to the driving time, the second target power generation amount and the total vehicle energy consumption, and operate the range extender at the second target power in the future driving section; the calculation formula of the second target power generation amount is: Second target power generation amount = Total vehicle energy consumption + (Range extender activation SOC value - Real-time SOC value) * Battery set total power * Battery charging efficiency.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, This program is executed by a processor to implement the range-extended hybrid vehicle energy management method combined with navigation information as described in any one of claims 1-7.

Images