Range extender power generation strategy determination method, electronic equipment and storage medium

Abstract

The invention provides a range extender power generation strategy determination method, electronic equipment and a storage medium, and relates to the field of vehicles. The method comprises the steps of firstly obtaining a pre-constructed initial mapping relation; the initial mapping relation is a corresponding relation among the driving condition of the vehicle, the preset charge range and the power mapping table; the parameters in the initial mapping relation serve as test parameters, and the vehicle is tested under different driving working conditions; when the test is finished, acquiring a termination charge state and an initial charge state of the power battery under different driving working conditions; and taking a difference value between the termination charge state and the initial charge state in a preset range as a target power guarantee condition, and adjusting the generated power in the power mapping table to obtain a target mapping relation meeting the target power guarantee condition under each driving condition. And under any working condition, the generated power when the range extender supplies power to the power battery is determined according to the target mapping relation, so that accurate control on the generated power of the range extender can be realized, and the power protection effect of the power battery is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, and particularly to a method for determining a power extension device power generation strategy, an electronic device, and a storage medium. BACKGROUND

[0002] A power extension device in an electric vehicle can provide additional power to the power battery when the power battery is insufficient, thereby extending the cruising range of the electric vehicle. In actual applications, various working conditions are involved in electric vehicles. In particular, the working conditions of commercial electric vehicles have the characteristics of large changes in vehicle speed and load, various running areas, and high daily mileage, which makes it difficult to control the power extension device and ensures that the power extension device always supplies power to the power battery at an appropriate power generation power, thereby resulting in poor power preservation of the power battery and affecting the travel experience.

[0003] Therefore, how to accurately control the power extension device of the vehicle under any working condition and improve the power preservation effect of the vehicle power battery is a technical problem to be solved by those skilled in the art. SUMMARY

[0004] Therefore, one aspect of the present application provides a method for determining a power extension device power generation strategy, the method comprising: obtaining a pre-constructed initial mapping relationship; the initial mapping relationship is a correspondence between a driving condition of a vehicle, a preset charge range, and a power mapping table; the preset charge range is a preset range corresponding to a state of charge of a power battery when a power extension device of the vehicle is triggered under different driving conditions; and the power mapping table is a correspondence between a vehicle speed and a power generation power of the power extension device; using parameters in the initial mapping relationship as test parameters to test the vehicle under different driving conditions; obtaining a terminal state of charge and a starting state of charge of the power battery under different driving conditions at the end of the test; adjusting the power generation power in the power mapping table to obtain a target mapping relationship that meets a target power preservation condition in which a difference between the terminal state of charge and the starting state of charge is within a preset range under each driving condition.

[0005] Optionally, the test under different driving conditions using the parameters in the initial mapping relationship as test parameters comprises: determining a working condition parameter corresponding to each driving condition; the working condition parameter at least includes a test route profile constructed in a correspondence between a time point and a vehicle speed; inputting the test parameters and the working condition parameters into a pre-constructed vehicle simulation model for driving simulation test; In the driving simulation test, an actual vehicle speed and an actual state of charge of the vehicle are obtained; According to the initial mapping relationship, a target preset state of charge range to which the actual state of charge belongs is determined, and a target power mapping table corresponding to the target preset state of charge range is determined; According to the target power mapping table, a target power generation power corresponding to the actual vehicle speed is determined, and the range extender is controlled to supply power to the power battery at the target power generation power.

[0006] Optionally, the test road spectrum corresponding to the driving condition is determined, comprising: A historical driving segment of the vehicle and a characteristic parameter corresponding to the historical driving segment are obtained; the characteristic parameter comprises a timestamp, a speed characteristic and an acceleration characteristic; According to the characteristic parameter, the historical driving segment is clustered to obtain an initial road spectrum segment; and a target road spectrum type corresponding to the initial road spectrum segment is determined; the target road spectrum type comprises at least one of a deceleration type, a constant speed type, an acceleration type and an idle speed type; A test road spectrum total duration corresponding to each driving condition in the driving simulation test is obtained, and a first mapping relationship is constructed in advance; the first mapping relationship is a corresponding relationship between a road spectrum type and a preset proportion; the preset proportion is a preset proportion of a road spectrum duration corresponding to the road spectrum type to a total road spectrum duration; Based on the first mapping relationship, a target preset proportion corresponding to the target road spectrum type is determined; Through the target preset proportion and the test road spectrum total duration, a target road spectrum duration corresponding to each target road spectrum type is determined; From the initial road spectrum segment, a target road spectrum segment of the target road spectrum duration is extracted; and each target road spectrum segment is combined to obtain the test road spectrum.

[0007] Optionally, the condition parameter further comprises a vehicle operation parameter; the vehicle operation parameter comprises at least one of a vehicle load, a total power of an accessory and a driving slope; determining the vehicle operation parameter corresponding to the driving condition comprises: A historical operation parameter of the vehicle and a second mapping relationship constructed in advance are obtained; the second mapping relationship is a corresponding relationship between the driving condition, an operation parameter type and a percentile; The historical operation parameter is sorted in ascending order to obtain a historical operation parameter sequence; Based on the second mapping relationship, an operation parameter type corresponding to the historical operation parameter sequence and a target percentile corresponding to each driving condition are determined; determining a target percentile number corresponding to the target percentile in the sequence of historical operating parameters; and taking the target percentile number as the vehicle operating parameter.

[0008] Optionally, after obtaining the target mapping relationship satisfying the target power preservation condition under each driving condition, the method further comprises: taking the parameters in the target mapping relationship as test parameters to test the vehicle under different driving conditions; acquiring an economy evaluation index of the vehicle under different driving conditions at the end of the test; the economy evaluation index comprises at least one of an oil-electricity ratio, a 100-kilometer electricity consumption, and an injection amount of the range extender; judging whether the economy evaluation index is within a corresponding preset range; if yes, taking the target mapping relationship as a final target mapping relationship; if no, adjusting the power generation in the target mapping relationship to obtain the final target mapping relationship, with the economy evaluation index being within the corresponding preset range as a target condition.

[0009] Optionally, after obtaining the target mapping relationship satisfying the target power preservation condition under each driving condition, the method further comprises: taking the parameters in the target mapping relationship as test parameters to test the vehicle under different driving conditions; acquiring an NVH evaluation index of the vehicle under different driving conditions at the end of the test; the NVH evaluation index comprises at least one of noise, vibration, and sound roughness; determining a target speed and a target torque corresponding to each power generation in the target mapping relationship, with the NVH evaluation index being less than a corresponding preset value as a target condition.

[0010] Optionally, the driving condition comprises a constant speed condition; the constant speed condition is a condition in which the vehicle travels at a preset speed range; and the initial mapping relationship is constructed by: acquiring a target preset charge range, a target preset speed, and an efficiency-related parameter corresponding to the constant speed condition; the efficiency-related parameter comprises a preset slope value, a total power of accessories of the vehicle, a resistance coefficient, a total mass of the vehicle, and a total efficiency of a transmission system; determining a total resistance that the vehicle needs to overcome when traveling at each target preset speed according to the target preset speed, the resistance coefficient, the total mass of the vehicle, and the preset slope value; determining a vehicle driving efficiency through the total resistance and the target preset speed; determine target power generation corresponding to each target preset vehicle speed according to the vehicle driving efficiency, the total efficiency of the transmission system and the total power of the accessory; construct the initial mapping relationship according to the target preset state of charge range, the target preset vehicle speed and the target power generation.

[0011] Optionally, in the power mapping table, the vehicle speed includes a specified vehicle speed, and the power generation includes a specified power generation corresponding to the specified vehicle speed; the specified power generation is a power determined according to the whole vehicle demand power of the vehicle.

[0012] Another aspect of the present application provides an electronic device, comprising: a memory for storing a computer program; a processor for executing the computer program to implement the steps of the determination method of the range extender power generation strategy.

[0013] Another aspect of the present application provides a storage medium, the storage medium has a computer program stored thereon, the computer program is executed by a processor to implement the steps of the determination method of the range extender power generation strategy.

[0014] In summary, the present application provides a determination method of a range extender power generation strategy, an electronic device and a storage medium. First, an initial mapping relationship is obtained, which is a corresponding relationship between a driving condition of a vehicle, a preset state of charge range and a power mapping table. The parameters included in the initial mapping relationship are used as test parameters to test the vehicle under different driving conditions. At the end of the test, the terminal state of charge and the initial state of charge of the power battery under different driving conditions are obtained. The difference between the terminal state of charge and the initial state of charge is used as a target state of charge condition, and the power generation in the power mapping table is adjusted to obtain a target mapping relationship that meets the target state of charge condition under each driving condition. According to the target mapping relationship, the power generation of the range extender when supplying power to the power battery can be determined under any condition, which can realize accurate control of the power generation of the range extender, and further improve the power preservation effect of the power battery. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A first flowchart of a determination method of a range extender power generation strategy provided by the present application; Figure 2 A second flowchart of a determination method of a range extender power generation strategy provided by the present application; Figure 3 A flowchart of a determination method of a test road spectrum provided by the present application; Figure 4 A third flowchart of a determination method of a range extender power generation strategy provided by the present application; Figure 5 A fourth flowchart of a method for determining an engine-generator power generation strategy provided in the present application; Figure 6 A correspondence diagram of a preset state of charge range and power mapping table provided in the present application; Figure 7 A diagram of a power mapping table provided in the present application. DETAILED DESCRIPTION

[0016] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the description of the application and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It also will be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0017] It is to be understood that, although the terms first, second, third, etc. can be used herein to describe various information, these terms are not intended to denote a particular order or hierarchy. These terms are used only to distinguish one from another. For example, a first information can be termed a second information, and, similarly, a second information can be termed a first information, without departing from the scope of the present application. As used herein, the word "if' can be interpreted to mean "when" or "upon" or "in response to determining" taking into account the context in which the term is used.

[0018] Reference will now be made to Figure 1 , Figure 1 A first flowchart of a method for determining an engine-generator power generation strategy provided in the present application, the method comprising: S1, obtaining an initial mapping relationship constructed in advance; the initial mapping relationship is a correspondence between a driving condition of a vehicle, a preset state of charge range and a power mapping table; the preset state of charge range is a preset range corresponding to a state of charge of a power battery when an engine-generator of the vehicle is triggered under different driving conditions; the power mapping table is a correspondence between a vehicle speed and a power generation of the engine-generator.

[0019] In the present application, an initial mapping relationship is constructed in advance, which is a correspondence between a driving condition of a vehicle, a preset state of charge range and a power mapping table. The driving condition corresponds to the preset state of charge range one-to-one, and the preset state of charge range corresponds to the power mapping table one-to-one. By setting different preset state of charge ranges and power mapping tables, the engine-generator can be differentiated to supply power to the power battery, and the power supply requirement of the vehicle under any driving condition can be better met.

[0020] The pre-constructed initial mapping relationship is taken as an adjustment basis, and the power mapping table in the initial mapping relationship is adjusted to meet the power preservation demand under different driving conditions, so as to obtain a target mapping relationship.

[0021] Specifically, the driving conditions in the initial mapping relationship can be set according to actual needs. For example, the driving conditions include uniform speed announcement conditions, uniform speed with slope conditions, typical conditions and limit conditions. Among them, the uniform speed announcement condition refers to the condition that the vehicle uniformly drives at a fixed speed on a horizontal road. The uniform speed with slope condition refers to the condition that the vehicle uniformly drives at a fixed speed on a road with a fixed slope. Under the typical condition, the speed of the vehicle and the slope of the road both have the characteristics of frequent changes, involving acceleration, deceleration, uniform speed and idle speed and other situations, which can represent most users' daily driving situations. Under the limit condition, the vehicle drives at a very high speed on a large slope road (such as the Kunming-Maoming Highway), which is used to represent the most extreme driving situation encountered by the user.

[0022] On this basis, different preset charge ranges are set for different driving conditions. The value of the preset charge range can be set according to actual needs, which is not particularly limited in the present application. Generally speaking, the smaller the boundary value of the preset charge range, the closer it is to the range of the state of charge of the power battery under the limit condition. Taking the driving conditions including uniform speed announcement conditions, uniform speed with slope conditions, typical conditions and limit conditions as an example, the preset charge range corresponding to the uniform speed announcement condition can be (22%, 18%]; the preset charge range corresponding to the uniform speed with slope condition can be (18%, 15%]; the preset charge range corresponding to the typical condition can be (15%, 12%]; and the preset charge range corresponding to the limit condition can be (12%, 9%].

[0023] Further, different preset charge ranges correspond to different power mapping tables, and the power mapping table is the corresponding relationship between the vehicle speed and the power generation of the range extender. The vehicle speed in the preset charge range and the power mapping table are maintained unchanged after being pre-set, and the power generation in the power mapping table is mainly adjusted subsequently. The value of the power generation in the initial mapping relationship is not particularly limited in the present application, which can be set according to actual needs or experience.

[0024] It should be noted that under the same driving condition, the greater the vehicle speed, the greater the power consumption of the power battery. In order to achieve better power preservation effect, the range extender needs to supplement more power to the power battery. Therefore, for the same power mapping table, the greater the corresponding vehicle speed, the greater the value of the power generation. The power generation in the power mapping table in the initial mapping relationship can be set according to this rule, which can relatively reduce the workload of adjusting the initial mapping relationship to obtain the target mapping relationship subsequently.

[0025] S2, test the vehicle under different driving conditions with the parameters in the initial mapping relationship as test parameters.

[0026] After the initial mapping relationship is constructed, test the vehicle under different driving conditions with the parameters in the initial mapping relationship as test parameters. The test purpose is to determine the target power generation power of the range extender based on the test parameters according to the actual state of charge and actual vehicle speed of the vehicle; and to determine whether the power preservation effect of the power battery meets the requirements when the range extender supplies power to the power battery according to the target power generation power.

[0027] It should be noted that real vehicle testing can be used, or driving simulation testing can be used by using a pre-constructed vehicle simulation model. The process of driving simulation testing using a vehicle simulation model will be described in subsequent embodiments, which will not be described here.

[0028] It should also be noted that the vehicle here can be a specified vehicle, or a plurality of specified vehicles of the same model, or a plurality of specified vehicles with the same application scenario (such as commercial superstore delivery vehicles and logistics vehicles, etc.), which are not particularly limited by the present application. The specified vehicle includes but is not limited to a car, a sport utility vehicle (SUV), a multi-purpose vehicle (MPV), an off-road vehicle, a pickup truck, or other non-railway-carrying vehicles powered by power.

[0029] S3, at the end of the test, obtain the terminal state of charge and the initial state of charge of the power battery under different driving conditions.

[0030] The initial state of charge is the state of charge of the power battery at the beginning of the test; and the terminal state of charge is the state of charge of the power battery at the end of the test.

[0031] In order to evaluate the power preservation effect of the power battery, the terminal state of charge and the initial state of charge of the power battery under different driving conditions are obtained at the end of the test, so as to determine whether the power generation power in the power mapping table corresponding to each driving condition needs to be adjusted according to the terminal state of charge and the initial state of charge under each driving condition.

[0032] S4, adjust the power generation power in the power mapping table to obtain a target mapping relationship that meets the target power preservation condition under each driving condition, with the difference between the terminal state of charge and the initial state of charge being within a preset range.

[0033] Specifically, in the present application, the power preservation effect of the power battery is evaluated by comparing the difference between the terminal state of charge and the initial state of charge. If the difference between the terminal state of charge and the initial state of charge is within a preset range, it indicates that the range extender effectively provides additional power for the power battery during the driving of the vehicle, and a good power preservation effect is obtained. The above-mentioned preset range can be set according to actual needs, and the present application does not make special limitations thereto.

[0034] Therefore, in the present application, the difference between the terminal state of charge and the initial state of charge within the preset range is taken as the target power preservation condition. The power generation power in each power mapping table in the initial mapping relationship is adjusted with the target power preservation condition as the adjustment target. For each driving condition, if the above-mentioned difference is within the preset range, it is determined that the range extender can provide power for the power battery according to the power generation power in the power mapping table corresponding to the driving condition, so that the power battery can obtain a good power preservation effect, i.e., the target power preservation condition is met; if the above-mentioned difference is not within the preset range, the power generation power in the power mapping table corresponding to the driving condition needs to be continuously adjusted with the difference within the preset range as the target power preservation condition.

[0035] Finally, the target mapping relationship that meets the target power preservation condition under each driving condition is obtained, so that in any driving condition, as long as the range extender provides power for the power battery according to the power generation power in the target mapping relationship, the power battery can obtain a good power preservation effect.

[0036] In addition, the present application does not make special limitations on the specific way of adjusting the power generation power in the power mapping table. For example, the power generation power in the power mapping table is increased according to a preset step; after each increase of the power generation power, the terminal state of charge and the difference between the terminal state of charge and the initial state of charge are determined; if the difference is not within the preset range, the power generation power in the power mapping table is continuously increased according to the preset step until the difference belongs to the preset range.

[0037] Therefore, the method for determining the power generation strategy of the range extender provided by the embodiments of the present application can realize accurate control of the power generation power of the range extender according to the power generation power of the range extender for providing power for the power battery according to the target mapping relationship in any driving condition, thereby improving the power preservation effect of the power battery. Without manual complex operation, the power generation power of the range extender can be infinitely controlled.

[0038] On the basis of the above-mentioned embodiments: The process of performing driving simulation test by using the vehicle simulation model will be described below.

[0039] As an optional embodiment, the parameters in the initial mapping relationship are taken as test parameters to test the vehicle under different driving conditions, including: determine the working condition parameters corresponding to each driving condition; the working condition parameters at least include a test road profile constructed in correspondence with the relationship between time points and vehicle speeds; input the test parameters and the working condition parameters into a pre-constructed vehicle simulation model to perform driving simulation testing; In the driving simulation testing, the actual vehicle speed and the actual state of charge of the power battery are obtained; According to the initial mapping relationship, the target preset state of charge range to which the actual state of charge belongs is determined, and the target power mapping table corresponding to the target preset state of charge range is determined; According to the target power mapping table, the target power generation power corresponding to the actual vehicle speed is determined, and the range extender is controlled to supply power to the power battery at the target power generation power.

[0040] In this embodiment, the driving simulation testing is performed by using the pre-constructed vehicle simulation model, which is suitable for driving simulation testing under various driving conditions, can shorten the testing period, improve the testing efficiency, and reduce the development cost. The specific implementation of constructing the vehicle simulation model is not particularly limited in the present application, as long as the simulation of the real vehicle can be realized.

[0041] Please refer to Figure 2 , Figure 2 is a second flowchart of a method for determining a range extender power generation strategy provided by the present application. Specifically, the test parameters and the working condition parameters corresponding to each driving condition determined are input into the vehicle simulation model to perform driving simulation testing. The working condition parameters at least include a test road profile constructed in correspondence with the relationship between time points and vehicle speeds, so that the vehicle simulation model simulates the driving process of the real vehicle at each time point according to the vehicle speed in the test road profile. The process of determining the test road profile corresponding to the driving condition will be described in subsequent embodiments, which will not be described here.

[0042] In the driving simulation testing, the actual vehicle speed and the actual state of charge of the power battery are obtained; based on the initial mapping relationship, the preset state of charge range to which the actual state of charge belongs is determined as the target preset state of charge range; the power mapping table corresponding to the target preset state of charge range is determined as the target power mapping table; based on the target power mapping table, the target power generation power corresponding to the actual vehicle speed is determined, and the range extender is controlled to supply power to the power battery at the target power generation power.

[0043] At the end of the driving simulation testing, the terminal state of charge of the power battery is determined. The initial state of charge is pre-set and input into the vehicle simulation model in advance. By judging whether the difference between the terminal state of charge and the initial state of charge is within the preset range, it is evaluated whether the initial mapping relationship meets the target power preservation condition. The power generation power in the power mapping table in the initial mapping relationship is adjusted until the target mapping relationship is obtained, with the target power preservation condition as the adjustment target.

[0044] In summary, in the embodiment, the driving simulation test is performed by using the vehicle simulation model, the driving simulation test under various driving conditions is applicable, the test period is shortened, the test efficiency is improved, and the development cost is reduced.

[0045] The process of determining the test road spectrum corresponding to the driving condition is described below.

[0046] As an optional embodiment, determining the test road spectrum corresponding to the driving condition comprises: obtaining a historical driving segment of the vehicle and a characteristic parameter corresponding to the historical driving segment; the characteristic parameter comprises a timestamp, a speed characteristic, and an acceleration characteristic; According to the characteristic parameter, the historical driving segment is clustered to obtain an initial road spectrum segment; and a target road spectrum type corresponding to the initial road spectrum segment is determined; the target road spectrum type comprises at least one of a deceleration type, a constant speed type, an acceleration type, and an idle speed type; obtaining a total test road spectrum duration corresponding to each driving condition in the driving simulation test, and a first mapping relationship constructed in advance; the first mapping relationship is a corresponding relationship between a road spectrum type and a preset proportion; the preset proportion is a ratio of a road spectrum duration corresponding to the road spectrum type to a total road spectrum duration; determining a target preset proportion corresponding to the target road spectrum type based on the first mapping relationship; determining a target road spectrum duration corresponding to each target road spectrum type through the target preset proportion and the total test road spectrum duration; extracting a target road spectrum segment of the target road spectrum duration from the initial road spectrum segment; and combining each target road spectrum segment to obtain the test road spectrum.

[0047] Please refer to Figure 3 , Figure 3 A flowchart for determining the test road spectrum is provided in the present application.

[0048] In the embodiment, first, the historical driving segment of the vehicle and the characteristic parameter are obtained; the characteristic parameter comprises a timestamp, a speed characteristic, and an acceleration characteristic. The historical driving segment contains the speed information of the vehicle. The timestamp in the characteristic parameter is the timestamp corresponding to each speed information in the historical driving segment. The speed characteristic and the acceleration characteristic in the characteristic parameter each contain multiple dimensions, which can be specifically referred to the provisions in GBT38146.1, for example, the speed characteristic contains average speed, running average speed (average speed under non-idle speed state), acceleration duration, deceleration duration, constant speed duration, and idle speed duration, etc.; the acceleration characteristic contains average acceleration in the acceleration section and average deceleration in the deceleration section, etc.

[0049] In addition, as Figure 3As shown, after obtaining the historical driving segments, the historical driving segments can be preprocessed (including but not limited to removing outliers, supplementing missing values in the historical driving segments by using linear interpolation, etc.) to improve the reliability of the test road map constructed based on the historical driving segments.

[0050] According to the characteristic parameters of the historical driving segments, the historical driving segments are clustered so that the speed Euclidean distance and the acceleration Euclidean distance corresponding to the historical driving segments belonging to the same class are as small as possible, and finally the initial road map segments are obtained. The process of clustering is not particularly limited in the present application. For example, a characteristic parameter matrix is constructed according to the characteristic parameters, and the contribution value of each characteristic parameter is determined by solving the covariance matrix of the characteristic parameters, and the characteristic parameters with a contribution value exceeding a preset contribution value are retained to reduce the calculation amount of clustering the historical driving segments according to the characteristic parameters subsequently. The clustering algorithm is also not particularly limited in the present application, and can be selected according to actual needs.

[0051] It should be noted that the first mapping relationship is pre-constructed in the present embodiment, and the first mapping relationship is a corresponding relationship between the road map type and the preset proportion. The preset proportion is a ratio of a road map duration corresponding to the road map type to a total road map duration. In order to determine the target road map duration corresponding to each initial road map required for constructing the test road map based on the first mapping relationship. The first mapping relationship can refer to the provisions of WLTC (Worldwide Harmonized Light Vehicles Test Cycle), CLTC-P (China Light-duty Vehicle Test Cycle - Passenger), and CHTC-LT (China Heavy-duty Commercial Vehicle Test Cycle - Light Truck), which are not particularly limited in the present application.

[0052] On the basis of the above, after obtaining the initial road map segments, the present embodiment determines the target road map type corresponding to the initial road map segments. The target road map type includes at least one of the deceleration type, the constant speed type, the acceleration type and the idle speed type. The classification criteria of the deceleration type, the constant speed type, the acceleration type and the idle speed type can also refer to the industry regulations, and the target road map type corresponding to the initial road map segments can be determined according to the classification criteria.

[0053] After determining the target road spectrum type corresponding to the initial road spectrum segment, a target preset proportion corresponding to the target road spectrum type is determined according to the first mapping relationship constructed in advance. Then, a product of the total duration of the test road spectrum and the target preset proportion is determined based on the total duration of the test road spectrum set in advance, and the product is taken as a target road spectrum duration corresponding to the target road spectrum type. On this basis, a target road spectrum segment of the target road spectrum duration is extracted from the initial road spectrum segment, and each target road spectrum segment is combined, so that the test road spectrum is obtained.

[0054] In addition, after obtaining the test road spectrum, the rationality of the test road spectrum can also be verified. For example, a first average speed of the test road spectrum is determined, a second average speed of each initial road spectrum segment is determined, and an average value of the second average speed is determined. If the first average speed is close to the average value, it is considered that the rationality of the test road spectrum meets the requirements.

[0055] In summary, in the embodiment, the test road spectrum is constructed based on the historical driving segment of the vehicle and the feature parameters corresponding to the historical driving segment, which can ensure the authenticity of the test road spectrum, close to the real driving scene of the user, and improve the reliability of subsequent driving simulation test and determination of the target mapping relationship.

[0056] As an optional embodiment, the working condition parameter further includes a vehicle operating parameter; the vehicle operating parameter includes at least one of a vehicle load, a total power of an accessory, and a driving slope; and determining the vehicle operating parameter corresponding to the driving working condition includes: obtaining a historical operating parameter of the vehicle and a second mapping relationship constructed in advance; the second mapping relationship is a corresponding relationship among the driving working condition, an operating parameter type, and a percentile; sequentially sorting the historical operating parameter in ascending order to obtain a historical operating parameter sequence; determining, based on the second mapping relationship, an operating parameter type corresponding to the historical operating parameter sequence and a target percentile corresponding to each driving working condition; determining a target percentile number corresponding to the target percentile in the historical operating parameter sequence; and taking the target percentile number as the vehicle operating parameter.

[0057] In the embodiment, the working condition parameter corresponding to the driving working condition further includes a vehicle operating parameter; the vehicle operating parameter includes at least one of a vehicle load, a total power of an accessory, and a driving slope. The vehicle operating parameter, the test road spectrum, and the test parameter are input into the vehicle simulation model together, which can more realistically simulate the real driving working condition of the vehicle, improve the authenticity of the driving simulation test, and further ensure the accuracy of the subsequently determined target mapping relationship.

[0058] It is considered that the vehicle operating parameters are different when the driving conditions are different. Taking the driving conditions including the uniform speed announcement condition, the uniform speed with slope condition, the typical condition and the limit condition as examples, the closer the driving condition is to the limit condition, the closer the value of the vehicle operating parameter is to the limit value. Therefore, the second mapping relationship is pre-constructed in the embodiment, and the second mapping relationship is the corresponding relationship among the driving conditions, the operating parameter types and the percentiles. For the same driving condition, the corresponding percentile may be different when the operating parameter type is different. For the same operating parameter type, the value of the target percentile is larger when the driving condition is closer to the limit condition. The specific value of the percentile can be set according to actual requirements.

[0059] On this basis, first, the historical operating parameters are sorted in ascending order to obtain a historical operating parameter sequence. Then, based on the second mapping relationship, the operating parameter type corresponding to the historical operating parameter sequence is determined, and the target percentile under each driving condition is determined. After the target percentile is determined, the target percentile number corresponding to the target percentile in the historical operating parameter sequence is determined; and the target percentile number is taken as the vehicle operating parameter.

[0060] Taking the vehicle load as an example, in the second mapping relationship, the percentile corresponding to the uniform speed announcement condition can be 10%; the percentile corresponding to the uniform speed with slope condition can be 50%; the percentile corresponding to the typical condition can be 70%; and the percentile corresponding to the limit condition can be 90%. Therefore, the 10th percentile number of the historical vehicle load sequence is the vehicle load corresponding to the uniform speed announcement condition, the 50th percentile number of the historical vehicle load sequence is the vehicle load corresponding to the uniform speed with slope condition, and the same applies to other conditions, which will not be described here.

[0061] In summary, in the embodiment, the vehicle operating parameters corresponding to each driving condition are determined based on the historical operating parameters of the vehicle and the pre-constructed second mapping relationship, which can more realistically simulate the real driving conditions of the vehicle, improve the authenticity of the driving simulation test, and further ensure the accuracy of the subsequently determined target mapping relationship.

[0062] In addition, please refer to Figure 4 , Figure 4 a third flowchart of a method for determining an extended range generator power generation strategy provided by the present application. When the driving simulation test is performed by using the vehicle simulation model, the parameters related to the driving conditions, which only represent the characteristics of the vehicle itself, such as the drag coefficient, the single reduction ratio, the tire rolling radius, etc., can also be input into the vehicle simulation model, which improves the simulation degree of the real vehicle, and further improves the authenticity of the driving simulation test and ensures the accuracy of the subsequently determined target mapping relationship.

[0063] As an optional embodiment, after the target mapping relationship meeting the target power preservation condition under each driving condition is obtained, the method further comprises: take the parameters in the target mapping relationship as test parameters to test the vehicle under different driving conditions; At the end of the test, obtain the economy evaluation indexes of the vehicle under different driving conditions; the economy evaluation indexes include at least one of oil-electricity ratio, 100-kilometer electricity consumption, and fuel injection amount of the range extender; determine whether the economy evaluation indexes are all within the corresponding preset ranges; If yes, take the target mapping relationship as the final target mapping relationship; If no, adjust the power generation of the target mapping relationship to obtain the final target mapping relationship, with the economy evaluation indexes all within the corresponding preset ranges as a target condition.

[0064] In this embodiment, after obtaining the target mapping relationship, the target mapping relationship is further optimized based on the economy evaluation indexes, so that when the range extender generates power according to the power generation in the final target mapping relationship, the power preservation effect of the power battery can be ensured, energy consumption can be saved, and good economy can be achieved.

[0065] Specifically, after obtaining the target mapping relationship, take the parameters in the target mapping relationship as test parameters to test the vehicle under different driving conditions. Here, the vehicle simulation model can also be used for driving simulation test, and the specific test process will not be described again.

[0066] After the test, obtain the economy evaluation indexes of the vehicle under different driving conditions. Please refer to Figure 4 In this embodiment, the economy evaluation indexes include at least one of oil-electricity ratio, 100-kilometer electricity consumption, and fuel injection amount of the range extender. The oil-electricity ratio is the electric energy generated by the vehicle consuming 1L of fuel; the higher the oil-electricity ratio, the higher the power generation efficiency and the better the economy. The 100-kilometer electricity consumption is the electric energy consumed by the vehicle in the process of driving 100 kilometers; the lower the 100-kilometer electricity consumption, the better the economy. The fuel injection amount of the range extender is the total amount of fuel injected into the cylinder by the engine in the range extender per unit time to maintain the power generation; the lower the fuel injection amount of the range extender under the condition of maintaining the same power generation, the better the economy.

[0067] For different economy evaluation indexes, corresponding preset ranges are set in advance. The values of the preset ranges can be set according to actual needs, and the present application does not particularly limit this. If the economy evaluation index is within the preset range, it means that the economy evaluation index meets the requirements, the range extender determines the power generation based on the target mapping relationship at this time, and good power preservation effect and good economy can be obtained.

[0068] Based on this, please refer to Figure 5 , Figure 5A fourth flowchart of a method for determining an extended-range generator power generation strategy is provided in the present application. After obtaining the economy evaluation indexes of the vehicle under different driving conditions, the embodiment determines whether the economy evaluation indexes are all within the corresponding preset ranges. If yes, the target mapping relationship is taken as the final target mapping relationship. If no, the final target mapping relationship is obtained by continuously adjusting the power generation power in the power mapping table corresponding to the driving condition in the target mapping relationship under the condition that the economy evaluation indexes are all within the corresponding preset ranges.

[0069] In addition, for the application scenario in which the power preservation effect has a higher priority than the economy, after obtaining the final target mapping relationship, it can be further verified whether the final target mapping relationship satisfies the target power preservation condition. If not, the final target mapping relationship is fine-tuned. The power preservation effect of the power battery is preferentially guaranteed when the extended-range generator generates power according to the power generation power in the final target mapping relationship, and the economy is guaranteed secondarily.

[0070] In summary, the embodiment further determines whether the target mapping relationship satisfies the economy requirement based on the economy evaluation indexes, so that the extended-range generator generates power according to the power generation power in the final target mapping relationship, which can guarantee the power preservation effect of the power battery and save energy consumption, and has good economy.

[0071] As an optional embodiment, after obtaining the target mapping relationship that satisfies the target power preservation condition under each driving condition, the method further includes: testing the vehicle under different driving conditions by taking the parameters in the target mapping relationship as test parameters; obtaining the NVH evaluation indexes of the vehicle under different driving conditions at the end of the test; the NVH evaluation indexes include at least one of noise, vibration, and sound vibration roughness; determining the target speed and the target torque corresponding to each power generation power in the target mapping relationship under the condition that the NVH evaluation indexes are all less than the corresponding preset values.

[0072] Please refer to Figure 5 , Figure 5 A fourth flowchart of a method for determining an extended-range generator power generation strategy is provided in the present application. In the embodiment, after obtaining the target mapping relationship, the target speed and the target torque corresponding to each power generation power in the target mapping relationship are determined based on the NVH (Noise, Vibration, Harshness, noise, vibration, and sound vibration roughness) evaluation indexes, so as to optimize the driving experience.

[0073] Specifically, after obtaining the target mapping relationship, the parameters in the target mapping relationship are used as test parameters to test the vehicle under different driving conditions. Driving simulation tests can also be performed using a vehicle simulation model; the specific testing process will not be elaborated further.

[0074] After the test, obtain the vehicle's NVH evaluation indicators under different driving conditions. Please refer to... Figure 4 NVH evaluation indicators include at least one of noise, vibration, and acoustic roughness. The lower the NVH evaluation indicator, the better the driving experience. Therefore, with all NVH evaluation indicators below their corresponding preset values ​​as the target condition, the target speed and target torque corresponding to each power generation in the target mapping relationship are determined, so that the range extender operates according to these target speeds and torques to provide power to the battery. The preset values ​​corresponding to the NVH evaluation indicators can be set according to actual needs; this embodiment does not impose any special limitations on this.

[0075] In summary, in this embodiment, based on NVH evaluation indicators, the target speed and target torque corresponding to each power generation in the target mapping relationship are determined to optimize the driving experience.

[0076] In addition, please refer to Figure 4 When using a vehicle simulation model for simulated driving tests, the range extender can also be used for NVH shutdown determination, range extender start-stop interval protection, and power generation compensation.

[0077] Specifically, NVH (Noise, Vibration, and Harshness) entry and exit speeds are preset. After determining the target power output of the range extender based on the target mapping relationship, it is necessary to determine whether the range extender can be activated based on the vehicle's actual speed, NVH entry speed, and NVH exit speed. Specifically, if the actual vehicle speed is less than the NVH entry speed, the NVH optimization mode is entered, which means the range extender is shut down to ensure driving comfort; if the actual vehicle speed is greater than the NVH exit speed, the NVH optimization mode is exited, which means the range extender is activated so that it generates power according to the target power output to provide energy to the power battery.

[0078] When it is necessary to switch the range extender from the start-up state to the stop state, it is necessary to first determine the actual start-up duration of the range extender. If the actual start-up duration is greater than... Figure 4 If the start-up duration is determined, the range extender can be switched to a stopped state. When switching the range extender from a stopped state to a start-up state, the actual stop-up duration must first be determined. If the actual stop-up duration is greater than... Figure 4 The downtime duration can be set to switch the range extender to the start-up state, avoiding frequent switching of the range extender's state.

[0079] In addition, when the vehicle is running in a congested road condition, a road with a large slope, and the vehicle is overloaded, the additional compensation power can be added on the basis of the target power determined by the target mapping relationship, so that the range extender provides power for the power battery with greater power generation, and better power protection effect is obtained.

[0080] The process of constructing the initial mapping relationship under the constant speed condition is described below.

[0081] As an optional embodiment, the driving condition includes a constant speed condition; the constant speed condition is a condition in which the vehicle runs at a preset speed range; and the initial mapping relationship is constructed by: obtaining a target preset charge range corresponding to the constant speed condition, a target preset speed, and efficiency-related parameters; the efficiency-related parameters include a preset slope value, a total power of accessories of the vehicle, a resistance coefficient, a total mass of the vehicle, and a total efficiency of a transmission system; determining total resistance that the vehicle needs to overcome when running at each target preset speed according to the target preset speed, the resistance coefficient, the total mass of the vehicle, and the preset slope value; determining a driving efficiency of the vehicle by the total resistance and the target preset speed; determining a target power generation corresponding to each target preset speed by the driving efficiency of the vehicle, the total efficiency of the transmission system, and the total power of the accessories; constructing the initial mapping relationship according to the target preset charge range, the target preset speed, and the target power generation.

[0082] In this embodiment, the constant speed condition includes a constant speed condition without slope and a constant speed condition with slope, and both of them can construct the initial mapping relationship according to the construction method provided in this embodiment. As described above, the initial mapping relationship is the corresponding relationship between the driving condition of the vehicle, the preset charge range, and the power mapping table. The target preset charge range corresponding to the constant speed condition and each target preset speed in the power mapping table can be set according to actual needs. This embodiment focuses on determining the target power generation corresponding to each target preset speed in the power mapping table. Based on the initial mapping relationship constructed in the manner provided in this embodiment, the workload of adjusting the initial mapping relationship to obtain the target mapping relationship can be relatively reduced, and the efficiency of determining the target mapping relationship can be improved.

[0083] First, the total resistance that the vehicle needs to overcome when running at each target preset speed is determined according to the target preset speed, the resistance coefficient, the total mass of the vehicle, and the preset slope value. Specifically, the first resistance that the vehicle needs to overcome when running at the target preset speed on a horizontal road is determined according to the target preset speed and the resistance coefficient. The determination of the first resistance can be expressed as wherein, is the first resistance, is the target preset speed, , and are resistance coefficients, characterize air resistance coefficients, characterize rolling resistance coefficients, characterize the static resistance when the slope is zero and the constant resistance generated by the vehicle's own weight. Then, according to the total vehicle mass and the preset slope value, the second resistance that the vehicle needs to overcome when traveling at a target preset vehicle speed on a road surface with a preset slope value is determined, which can also be referred to as a slope resistance. The way to determine the second resistance can be expressed as wherein, is the second resistance, is the total vehicle mass, is the acceleration of gravity, is the preset slope value. For the uniform speed announcement working condition, the value of the second resistance is zero, and the total resistance is equal to the first resistance. For the uniform speed with slope working condition, the total resistance is equal to the sum of the first resistance and the second resistance.

[0084] Secondly, after determining the total resistance, the vehicle driving efficiency is determined by the total resistance and the target preset vehicle speed. Specifically, the way to determine the vehicle driving efficiency can be expressed as: wherein, is the vehicle driving efficiency, is the total resistance, is the target preset vehicle speed.

[0085] Then, the target power generation power corresponding to each target preset vehicle speed is determined by the vehicle driving efficiency, the total efficiency of the transmission system, and the total power of the accessories. Specifically, the sum of the quotient obtained by dividing the vehicle driving efficiency by the total efficiency of the transmission system and the total power of the accessories is taken as the target power generation power.

[0086] Finally, after determining the target power generation power corresponding to each preset target vehicle speed, the initial mapping relationship is constructed according to the target preset charge range, the target preset vehicle speed, and the target power generation power.

[0087] In summary, the embodiment provides a specific implementation manner of constructing an initial mapping relationship under a uniform speed working condition, which can relatively reduce the workload of adjusting the initial mapping relationship to obtain a target mapping relationship and improve the efficiency of determining the target mapping relationship.

[0088] As an optional embodiment, in the power mapping table, the vehicle speed includes a specified vehicle speed, and the power generation power includes a specified power generation power corresponding to the specified vehicle speed; the specified power generation power is a power determined according to the total vehicle demand power of the vehicle.

[0089] As described above, the power mapping table is a correspondence between vehicle speed and power generation of the range extender. Considering that the power consumption of the power battery is relatively large when the vehicle speed is relatively large, in order to achieve a better power preservation effect, the range extender needs to supply power to the power battery at a higher power generation.

[0090] Therefore, in the embodiment, the power mapping table includes a specified vehicle speed and a specified power generation corresponding to the specified vehicle speed. The specified vehicle speed can be set according to actual needs, for example, all vehicle speeds greater than a preset vehicle speed in the power mapping table are taken as the specified vehicle speed. The specified power generation is a power determined according to the whole vehicle demand power of the vehicle, and is not a fixed value. The embodiment does not particularly limit how to determine the specified power generation according to the whole vehicle demand power of the vehicle. For example, the whole vehicle demand power is taken as the specified power generation.

[0091] In summary, in the embodiment, the specified power generation corresponding to the specified vehicle speed is a power determined according to the whole vehicle demand power of the vehicle. The range extender provides additional power to the power battery according to the whole vehicle demand power, which can further improve the power preservation effect.

[0092] After determining the target mapping relationship based on the above steps, the target power generation of the range extender can be determined according to the target mapping relationship in the application stage. The process of determining the target power generation of the range extender is described below in combination with Figure 6 and Figure 7 , Figure 6 , Figure 6 A correspondence between a preset charge range and a power mapping table provided by the present application is shown in the following table. Please refer to Figure 7 , Figure 7 A schematic diagram of a power mapping table provided by the present application is shown in the following table.

[0093] Here, the driving conditions also include the uniform speed announcement condition, the uniform speed with slope condition, the typical condition and the limit condition. The first preset charge range corresponding to the uniform speed announcement condition is (22%, 18%]; the second preset charge range corresponding to the uniform speed with slope condition is (18%, 15%]; the third preset charge range corresponding to the typical condition is (15%, 12%]; and the fourth preset charge range corresponding to the limit condition is (12%, 9%].

[0094] Figure 6 SOC is the actual charge range of the power battery, and SOCmin, SOC4, SOC5, SOC6 and SOC7 represent the boundary values of the above preset charge ranges. Specifically, SOCmin is 22%, SOCmax is the sum of 22% and a preset percentage (to prevent the start-stop state of the range extender from repeatedly jumping), SOC4 is 9%, SOC5 is 12%, SOC6 is 15%, and SOC7 is 18%.

[0095] Figure 6 In this table, E1 is the first power mapping table corresponding to the first preset charge range, E2 is the second power mapping table corresponding to the second preset charge range, E3 is the third power mapping table corresponding to the third preset charge range, and E4 is the fourth power mapping table corresponding to the fourth preset charge range.

[0096] Figure 7 The power mapping table shown is the third power mapping table. V is the actual vehicle speed, V1 to Vmin are all vehicle speeds in the third power mapping table, P1, P2, P3 and Pf are all power generation in the third power mapping table, and P is the target power generation. V1 to Vmin gradually decrease, P1 to P3 gradually decrease, V1 is the specified vehicle speed, and Pf is the specified power determined according to the power demand of the whole vehicle.

[0097] In the application phase, based on Figure 6 The diagram shows the correspondence between the preset charge range and the power mapping table. Based on the actual state of charge of the power battery during vehicle operation, the target preset charge range corresponding to the actual state of charge is determined; and the target power mapping table corresponding to the target preset charge range is also determined. If the target preset charge range is the third preset charge range, then the target power mapping table is the third power mapping table. Then, by comparing the vehicle's actual speed with the speeds in the third power mapping table, the target power generation corresponding to the actual speed is determined. Subsequently, the range extender can be controlled to provide power to the power battery according to the target power generation.

[0098] Another aspect of this application provides an electronic device, comprising: Memory, used to store computer programs; A processor, used to execute the computer program to implement the steps of determining any of the above-described range extender power generation strategies.

[0099] The aforementioned electronic device can be a domain controller in the vehicle, or it can be other electronic devices that are set up independently outside the vehicle. This application does not make any special limitation on this.

[0100] The aforementioned memory includes all forms of non-volatile memory, media, and memory devices, such as semiconductor memory devices (e.g., EPROM, EEPROM, and flash memory devices), magnetic disks (e.g., internal hard disks or removable disks), magneto-optical disks, and CD-ROMs and DVD-ROMs. Processors and memory may be supplemented by or incorporated into dedicated logic circuitry.

[0101] For a detailed description of the electronic equipment provided in this application, please refer to the embodiments of the method for determining the range extender power generation strategy described above; this application does not impose any particular limitations on it.

[0102] Another aspect of the present application provides a storage medium, having stored thereon a computer program, which, when executed by a processor, implements the steps of any of the above-mentioned methods for determining an extended-range generator power generation strategy.

[0103] For detailed introduction of the storage medium provided by the present application, please refer to the above-mentioned embodiments of the method for determining an extended-range generator power generation strategy, which will not be repeated here.

[0104] While this specification contains many specifics, these should not be construed as limitations on the scope of any invention, but merely as descriptions of particular embodiments thereof. Certain features that are, for clarity, described above in the context of separate embodiments, can also be provided in combination in a single embodiment. Conversely, various features that are, for brevity, described above in the context of a single embodiment, can also be provided separately or in any suitable subcombination. In addition, while features can be described above as being implemented in specific combinations, one or more features from a combination can in some cases be excised from the combination and provided in other combinations, or passed over, depending on the desires of a particular implementer. Only claims can require the features in conbinations for their patentability.

[0105] Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring such order, nor that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing can be advantageous. Moreover, the separation of various system modules and components in the embodiments described above should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

Claims

1. A method for determining a range extender power generation strategy, characterized in that, The method includes: Obtain a pre-constructed initial mapping relationship; the initial mapping relationship is the correspondence between the vehicle's driving conditions, the preset charge range, and the power mapping table; the preset charge range is the preset range of the power battery's state of charge when the vehicle's range extender is triggered under different driving conditions; the power mapping table is the correspondence between vehicle speed and the range extender's power generation. Using the parameters in the initial mapping relationship as test parameters, the vehicle is tested under different driving conditions; At the end of the test, the termination state of charge and the initial state of charge of the power battery under different driving conditions are obtained. Using the difference between the terminated charging state and the initial charging state within a preset range as the target power preservation condition, the power generation in the power mapping table is adjusted to obtain a target mapping relationship that satisfies the target power preservation condition under each of the driving conditions.

2. The method for determining the range extender power generation strategy as described in claim 1, characterized in that, The step of testing the vehicle under different driving conditions using the parameters in the initial mapping relationship as test parameters includes: Determine the operating parameters corresponding to each of the aforementioned driving conditions; the operating parameters include at least a test road spectrum constructed based on the correspondence between time points and vehicle speed; The test parameters and operating condition parameters are input into a pre-built vehicle simulation model for driving simulation testing. In the driving simulation test, the actual vehicle speed and the actual state of charge of the power battery are obtained; Based on the initial mapping relationship, determine the target preset charge range to which the actual state of charge belongs, and determine the target power mapping table corresponding to the target preset charge range; Based on the target power mapping table, the target power generation corresponding to the actual vehicle speed is determined, and the range extender is controlled to supply power to the power battery at the target power generation.

3. The method for determining the range extender power generation strategy as described in claim 2, characterized in that, Determining the test road spectrum corresponding to the driving conditions includes: The historical driving segments of the vehicle and the corresponding feature parameters of the historical driving segments are obtained; the feature parameters include timestamps, speed features, and acceleration features. Based on the feature parameters, the historical driving segments are clustered to obtain initial road spectrum segments; and the target road spectrum type corresponding to the initial road spectrum segments is determined; the target road spectrum type includes at least one of deceleration type, constant speed type, acceleration type and idling type; The total duration of the test road spectrum corresponding to each driving condition in the driving simulation test is obtained, as well as a pre-constructed first mapping relationship; the first mapping relationship is the correspondence between road spectrum type and preset ratio; the preset ratio is the ratio of the road spectrum duration corresponding to the road spectrum type to the total road spectrum duration set in advance. Based on the first mapping relationship, the target preset ratio corresponding to the target road spectrum type is determined; The target road spectrum duration corresponding to each target road spectrum type is determined by the target preset ratio and the total duration of the test road spectrum; From the initial road spectrum segment, a target road spectrum segment of the target road spectrum duration is extracted; and the target road spectrum segments are combined to obtain the test road spectrum.

4. The method for determining the range extender power generation strategy as described in claim 2, characterized in that, The operating parameters also include vehicle operating parameters; the vehicle operating parameters include at least one of the following: vehicle load, total power of accessories, and driving gradient. Determining the vehicle operating parameters corresponding to the driving conditions includes: The historical operating parameters of the vehicle and a pre-constructed second mapping relationship are obtained; the second mapping relationship is the correspondence between the driving conditions, operating parameter types, and percentiles. Sort the historical operating parameters in ascending order to obtain the historical operating parameter sequence; Based on the second mapping relationship, determine the type of operating parameter corresponding to the historical operating parameter sequence, and the target percentile corresponding to each driving condition; Determine the target percentile corresponding to the target percentile in the historical operating parameter sequence; and use the target percentile as the vehicle operating parameter.

5. The method for determining the power generation strategy of the range extender as described in claim 1, characterized in that, After obtaining the target mapping relationship that satisfies the target power preservation condition under each of the aforementioned driving conditions, the method further includes: Using the parameters in the target mapping relationship as test parameters, the vehicle is tested under different driving conditions; At the end of the test, the economic evaluation index of the vehicle under different driving conditions is obtained; the economic evaluation index includes at least one of the following: fuel-electric ratio, energy consumption per 100 kilometers, and fuel injection quantity of the range extender; Determine whether all the economic evaluation indicators are within the corresponding preset range; If so, then the target mapping relationship shall be taken as the final target mapping relationship; If not, then with the economic evaluation indicators all within the corresponding preset range as the target condition, the power generation in the target mapping relationship is adjusted to obtain the final target mapping relationship.

6. The method for determining the power generation strategy of the range extender as described in claim 1, characterized in that, After obtaining the target mapping relationship that satisfies the target power preservation condition under each of the aforementioned driving conditions, the method further includes: Using the parameters in the target mapping relationship as test parameters, the vehicle is tested under different driving conditions; At the end of the test, the NVH evaluation index of the vehicle under different driving conditions is obtained; the NVH evaluation index includes at least one of noise, vibration and acoustic roughness; With the NVH evaluation indexes all being less than the corresponding preset values ​​as the target condition, the target speed and target torque corresponding to each power generation in the target mapping relationship are determined.

7. The method for determining the power generation strategy of the range extender as described in claim 1, characterized in that, The driving conditions include constant speed conditions; The constant speed condition refers to the condition in which the vehicle travels within a preset speed range. Constructing the initial mapping relationship includes: Obtain the target preset charge range, target preset vehicle speed, and efficiency-related parameters corresponding to the constant speed condition; the efficiency-related parameters include the preset gradient value, the total power of the vehicle's accessories, the drag coefficient, the vehicle mass, and the total efficiency of the transmission system; Based on the target preset speed, the resistance coefficient, the vehicle mass, and the preset gradient value, determine the total resistance that the vehicle overcomes when traveling at a constant speed at each of the target preset speeds; The vehicle driving efficiency is determined by the total resistance and the target preset speed. The target power generation corresponding to each target preset vehicle speed is determined by the vehicle driving efficiency, the total efficiency of the transmission system, and the total power of the accessories. The initial mapping relationship is constructed based on the target preset charge range, the target preset vehicle speed, and the target power generation.

8. The method for determining the power generation strategy of the range extender as described in claim 1, characterized in that, In the power mapping table, vehicle speed includes a specified vehicle speed, and power generation includes a specified power generation corresponding to the specified vehicle speed; the specified power generation is the power determined based on the overall power demand of the vehicle.

9. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor, configured to execute the computer program to implement the steps of the method for determining the range extender power generation strategy as described in any one of claims 1 to 8.

10. A storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for determining the range extender power generation strategy as described in any one of claims 1 to 8.

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