Vehicle range extender control method, electronic device, and computer-readable storage medium

Abstract

The present application relates to the technical field of vehicle range extension control. Disclosed are a vehicle range extender control method, an electronic device, and a computer-readable storage medium. The method comprises: acquiring the current vehicle speed of a vehicle, and on the basis of the current vehicle speed, determining a maximum power generation power and a maximum rotational speed of a range extender of the vehicle; and on the basis of universal characteristic data of the range extender, determining a power generation power point range within which the range extender meets the maximum power generation power, the maximum rotational speed and a target fuel-to-electricity conversion rate, and controlling the range extender to operate at a power point within the power generation power point range so as to generate electricity. In this way, a power generation power point range is determined by means of a maximum power generation power and a maximum rotational speed, such that when range extenders operate at a power generation point within the range, the NVH performance of vehicles is better. In addition, the power generation power point range is also determined on the basis of a target fuel-to-electricity conversion rate, such that when range extenders operate at the power generation point, the fuel-to-electricity conversion rate of vehicles is also superior.

Description

Control method of vehicle range extender, electronic device and computer readable storage medium

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202411248265.3, filed on September 6, 2024, and entitled "Control method of vehicle range extender, electronic device and computer readable storage medium", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of vehicle range extension control, in particular to a control method of a vehicle range extender, an electronic device and a computer readable storage medium. BACKGROUND

[0004] In a range-extended new energy vehicle, when the battery pack has a power lower than a threshold power, the range extender is operated to generate power to supply the driving motor of the vehicle or directly supply the battery pack, thereby ensuring that the power of the battery pack is above the threshold power.

[0005] When the range extender is operated to generate power during vehicle driving, the power and the speed of the range extender are determined according to the vehicle speed. However, the NVH (Noise, Vibration, Harshness) performance and the oil-electricity conversion rate of the vehicle are not good when the range extender operates at some power points. SUMMARY

[0006] In view of the above problems, the present application provides a control method of a vehicle range extender, an electronic device and a computer readable storage medium, so that the NVH performance and the oil-electricity conversion rate of the vehicle are better.

[0007] The first aspect of the present application provides a control method of a vehicle range extender, comprising: obtaining a current vehicle speed of a vehicle, and determining a maximum power and a maximum speed of a range extender of the vehicle based on the current vehicle speed; determining a power point range of the range extender that meets the maximum power, the maximum speed and a target oil-electricity conversion rate based on universal characteristic data of the range extender, and controlling the range extender to operate at a power point in the power point range to generate power.

[0008] In some embodiments, the step of determining the maximum power generation and the maximum rotation speed of the range extender based on the current vehicle speed comprises: determining the required power generation of the range extender based on the current vehicle speed, and determining the maximum power generation corresponding to the target NVH standard that meets the required power generation; wherein different target NVH standards correspond to different maximum power generations under the same required power generation; determining the maximum rotation speed value that meets the target NVH standard under the preset speed range in which the current vehicle speed is located; wherein different target NVH standards correspond to different maximum rotation speed values under the same preset speed range.

[0009] In some embodiments, the step of determining the maximum rotation speed value that meets the target NVH standard under the preset speed range based on the current vehicle speed comprises: obtaining the current difference value between the current remaining capacity and the target remaining capacity of the battery pack of the vehicle; if the current difference value is greater than a preset difference value, determining the maximum rotation speed value that meets the target NVH standard under the preset speed range in which the current vehicle speed is located based on the first preset corresponding relationship; if the current difference value is less than or equal to the preset difference value, determining the maximum rotation speed value that meets the target NVH standard under the preset speed range in which the current vehicle speed is located based on the second preset corresponding relationship; wherein the maximum rotation speed value determined by the first preset corresponding relationship is greater than the maximum rotation speed value determined by the second preset corresponding relationship under the same preset speed range and target NVH standard.

[0010] In some embodiments, the step of determining the power generation point range of the range extender that meets the maximum power generation, the maximum rotation speed, and the target oil-electric conversion rate based on the universal characteristic data of the range extender, and controlling the range extender to work at the power point in the power generation point range comprises: determining the initial power generation point range of the range extender that meets the maximum power generation, the maximum rotation speed, and the target oil-electric conversion rate based on the universal characteristic data of the range extender; determining the target power generation point in the initial power generation point range based on the requirement for any one or more of the power generation, the rotation speed, and the oil-electric conversion rate of the range extender, and controlling the range extender to work at the target power generation point.

[0011] In some embodiments, the step of determining the target power generation point in the initial power generation point range based on the requirement for any one or more of the power generation, the rotation speed, and the oil-electric conversion rate of the range extender comprises: obtaining the current capacity difference between the current capacity and the target capacity of the battery pack of the vehicle; if the current capacity difference is greater than a preset capacity difference, taking the power point with the maximum power generation in the initial power generation point range as the target power generation point.

[0012] In some embodiments, after the step of obtaining the current power difference between the current power and the target power of the battery pack of the vehicle, the method further comprises: if the current power difference is less than or equal to a preset power difference, determining a speed range corresponding to all power points in the initial power generation power point range; determining a power point set in which the speed of the power points in the initial power generation power point range is less than an average speed of the speed range; and determining the power point with the highest oil-electric conversion rate in the power point set as the target power generation power point.

[0013] In some embodiments, after the step of obtaining the current power difference between the current power and the target power of the battery pack of the vehicle, the method further comprises: if the current power difference is less than or equal to a preset power difference, determining an oil-electric conversion rate range corresponding to all power points in the initial power generation power point range; determining a power point set in which the oil-electric conversion rate of the power points in the initial power generation power point range is greater than an average oil-electric conversion rate of the oil-electric conversion rate range; and determining the power point with the lowest speed in the power point set as the target power generation power point.

[0014] In some embodiments, before the step of determining the power generation power point range in which the range extender meets the maximum power generation, the maximum speed, and the target oil-electric conversion rate based on the universal characteristic data of the range extender, the method further comprises: obtaining characteristic data of the range extender at a preset power generation power point, and storing the correspondence between the preset power generation power point and the characteristic data as the universal characteristic data of the range extender; wherein the preset power generation power point comprises a speed and a torque; and wherein the characteristic data comprises oil-electric conversion rate data; and wherein the step of determining the power generation power point range in which the range extender meets the maximum power generation, the maximum speed, and the target oil-electric conversion rate based on the universal characteristic data of the range extender comprises: determining a preset power generation power point in which the range extender meets the maximum power generation, the maximum speed, and the target oil-electric conversion rate based on the universal characteristic data of the range extender, and storing a set of the preset power generation power points as the power generation power point range.

[0015] The second aspect of the present application provides an electronic device, comprising: a processor; a memory for storing a computer program, the computer program being executed by the processor to implement the control method of the vehicle range extender of any one of the above aspects.

[0016] The third aspect of the present application provides a computer-readable storage medium, characterized in that the storage medium stores a computer program, the computer program being executed by a processor to implement the control method of the vehicle range extender of any one of the above aspects.

[0017] The application has at least the following beneficial technical effects: based on the vehicle range extender control method, electronic device and computer readable storage medium provided by the application, the method comprises: acquiring the current speed of the vehicle, and determining the maximum power generation power and the maximum speed of the range extender of the vehicle based on the current speed; based on the universal characteristic data of the range extender, the power generation power point range of the range extender satisfying the maximum power generation power, the maximum speed and the target oil-electricity conversion rate is determined, and the range extender is controlled to work at the power point in the power generation power point range. Therefore, the power generation power point range is determined by the maximum power generation power and the maximum speed, so that when the range extender works at the power generation power point in the range, the NVH performance of the vehicle is better. Moreover, the power generation power point range is also determined based on the target oil-electricity conversion rate, so that when the range extender works at the power generation power point, the oil-electricity conversion rate of the vehicle is also better.

[0018] The above description is only a summary of the technical solutions of the embodiments of the application, in order to more clearly understand the technical means of the embodiments of the application, the embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the embodiments of the application more obvious and easy to understand, the specific embodiments of the application are described below. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are only used to show the embodiments and are not considered as limitations of the application. Moreover, the same reference signs are used to represent the same parts throughout the drawings. In the drawings:

[0020] Fig. 1 is a flowchart of an embodiment of the vehicle range extender control method provided by the application;

[0021] Fig. 2 is a universal characteristic diagram of the range extender;

[0022] Fig. 3 is a flowchart of another embodiment of the vehicle range extender control method provided by the application;

[0023] Fig. 4 is a flowchart of another embodiment of the vehicle range extender control method provided by the application;

[0024] Fig. 5 is a flowchart of another embodiment of the vehicle range extender control method provided by the application;

[0025] Fig. 6 is a flowchart of another embodiment of the vehicle range extender control method provided by the application;

[0026] Fig. 7 is a flowchart of another embodiment of the vehicle range extender control method provided by the application;

[0027] Fig. 8 is a flowchart of another embodiment of the vehicle range extender control method provided by the application;

[0028] FIG. 9 is a flow diagram of another embodiment of the control method of the vehicle range extender provided in the present application;

[0029] FIG. 10 is a structural framework diagram of an embodiment of the electronic device provided in the present application;

[0030] FIG. 11 is a structural framework diagram of an embodiment of the computer readable storage medium provided in the present application. DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0032] If the description of "first", "second", etc. is involved in the embodiments of the present application, the description of "first", "second", etc. is only for the purpose of description and should not be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can implement it. When the combination of technical solutions appears contradictory or unimplementable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0033] The first aspect of the present application provides a control method of a vehicle range extender. FIG. 1 is a flow diagram of an embodiment of the control method of the vehicle range extender provided in the present application. In combination with FIG. 1, the method includes the following steps:

[0034] S11: obtaining the current speed of the vehicle, and determining the maximum power generation of the range extender and the maximum speed of the vehicle based on the current speed.

[0035] The application scenario of the method is the scenario of generating electricity by the range extender when the vehicle is in a driving state. The current speed of the vehicle can be obtained by the vehicle controller. There is a predetermined relationship between the speed and the maximum power generation of the range extender, and there is also a predetermined relationship between the speed and the maximum speed. After obtaining the current speed, the corresponding maximum power generation of the range extender and the maximum speed can be obtained based on the current speed and the corresponding relationship.

[0036] The preset relationship between the vehicle speed and the maximum power generation of the range extender can include only the vehicle speed and the maximum power generation, or can include other elements. When other elements are included, information of the other elements is required to determine the maximum power generation by the preset relationship in combination with the vehicle speed. Similarly, the preset relationship between the vehicle speed and the maximum rotational speed is set in the same way, and thus will not be described again.

[0037] It should be understood that the maximum power generation of the range extender is used to limit the actual power generation of the range extender, and the actual power generation of the range extender when working should not exceed the maximum power generation. The maximum rotational speed of the range extender is used to limit the actual rotational speed of the engine of the range extender when working, that is, the actual working rotational speed of the engine of the range extender cannot exceed the maximum rotational speed.

[0038] S12: Based on the universal characteristic data of the range extender, determine the power generation point range of the range extender satisfying the maximum power generation, the maximum rotational speed and the target oil-electricity conversion rate, and control the range extender to work at a power generation point in the power generation point range.

[0039] It should be understood that the universal characteristic data of the range extender is determined by the characteristics of the vehicle range extension system itself. The range extenders of range extension systems of different types of vehicles can have different universal characteristic data. The universal characteristic data of the range extender can be obtained in advance for subsequent use. The universal characteristic data includes power point data and performance data of each power point, such as oil-electricity conversion rate data. The power point data includes torque data, rotational speed data of the power point, and power generation data determined according to the torque data and the rotational speed data. Therefore, the universal characteristic data can reflect the specific rotational speed, torque, power generation and various performances, such as oil-electricity conversion rate performance, of the range extender when working at different power points (including rotational speed and torque).

[0040] FIG. 2 is a universal characteristic diagram of a range extender.

[0041] FIG. 2 is drawn based on the universal characteristic data of the range extender, and the abscissa represents the rotational speed of the range extender, and the ordinate represents the torque of the range extender. Since the power generation of the range extender can be directly determined according to the rotational speed and the torque of the range extender, the point determined by the rotational speed of the abscissa and the torque of the ordinate in FIG. 2 is the power point of the range extender.

[0042] The plurality of curves 11 represent power curves, and power points on the same curve 11 have the same power generation. The plurality of curves 12 represent noise curves, which can be established based on NVH data corresponding to each power point in the universal characteristic data. The noise on the same curve 12 is the same, and the magnitude of the noise can reflect the NVH performance of the vehicle. The plurality of closed curves 13 represent oil-electric conversion rate curves, which can be established based on oil-electric conversion rate data corresponding to each power point in the universal characteristic data, and the power points on the same closed curve 13 correspond to the same oil-electric conversion rate.

[0043] Since the universal characteristic data of the range extender includes power point data and various performance data corresponding to the power point data, and specifically includes oil-electric conversion rate data corresponding to the power point, according to the speed data and power data in the power point data, the first power point range satisfying the maximum power generation and the maximum speed can be determined, and based on the oil-electric conversion rate data in the first power point, the second power point range satisfying the target oil-electric conversion rate can be further determined. The second power point range is the power generation point range satisfying the maximum power generation, the maximum speed and the target oil-electric conversion rate. Of course, the order of determining the power generation point range satisfying the maximum power generation, the maximum speed and the target oil-electric conversion rate is not limited to the above order. For example, the power point range can be determined based on the target oil-electric conversion rate first, and the power generation point range can be determined based on the maximum power generation and the maximum speed from the power point range.

[0044] In combination with FIG. 2, in some specific ways of determining the power generation point range, the first power point range satisfying the maximum power generation and the maximum speed can be divided by using the abscissa representing the speed and the curve 11 representing the power. Further, the second power point range satisfying the target oil-electric conversion rate in the first power point range, i.e., the power generation point range, can be determined by using the closed curve 13 representing the oil-electric conversion rate.

[0045] FIG. 3 is a flowchart of another embodiment of the control method of the vehicle range extender provided by the present application. In combination with FIG. 3, in some specific embodiments, the step of determining the maximum power generation and the maximum speed of the range extender of the vehicle based on the current vehicle speed, i.e., the above step S11, includes:

[0046] S21: determining the required power generation of the range extender of the vehicle based on the current vehicle speed, and determining the maximum power generation satisfying the required power generation and the target NVH standard; wherein different target NVH standards correspond to different maximum power generations under the same required power generation.

[0047] The specific manner of determining the required power generation of the range extender based on the current vehicle speed can be determined according to the related manner of the prior art, and this embodiment is not specifically limited. Generally, the required power generation is close to the actual driving power of the vehicle.

[0048] The required power generation, the target NVH standard, and the maximum power generation have a preset relationship, and after the required power generation and the target NVH standard are determined, the maximum power generation can be obtained according to the preset relationship. The target NVH standard can be selected from a plurality of preset NVH standards, so that the NVH performance of the vehicle meets the target NVH standard as much as possible.

[0049] It should be understood that the power generation of the range extender affects the NVH performance of the vehicle, and generally, the greater the power generation, the worse the NVH performance of the vehicle. In order to meet the target NVH standard, the power generation of the range extender needs to be less than a certain value, i.e., less than the maximum power generation. In the preset relationship, different target NVH standards correspond to different maximum power generations under the same required power generation. For example, if the target NVH standard has a higher requirement on the NVH performance, the maximum power generation is smaller. Moreover, the maximum power generation that meets the required power generation is greater than the required power generation, so that the amount of electricity generated by the range extender can meet the driving requirements of the vehicle and also charge the battery pack to a certain extent.

[0050] The maximum power generation determined in this manner fully considers the required power generation of the range extender and the target NVH standard, so that when the range extender works at a power less than the maximum power generation, the NVH performance of the vehicle is better.

[0051] S22: Determine a maximum speed value that meets the target NVH standard in the preset speed range based on the preset speed range in which the current vehicle speed is located; wherein different target NVH standards correspond to different maximum speed values in the same preset speed range.

[0052] It should be understood that the steps S21 and S22 of this embodiment do not limit the execution order of the steps.

[0053] Different preset speed ranges can not overlap with each other, different preset speed ranges correspond to different maximum speed values, and the preset speed range with a greater average vehicle speed corresponds to a greater maximum speed value. The preset speed range, the preset NVH standard, and the maximum speed value have a preset relationship, and after the preset speed range and the target NVH standard are determined, the maximum speed value can be directly obtained according to the preset relationship.

[0054] Based on the embodiment, the maximum power generation and the maximum rotation speed are obtained based on the target NVH standard, and the NVH performance of the vehicle is better when the range extender works at the power generation point in the power generation point range satisfying the maximum power generation and the maximum rotation speed.

[0055] FIG. 4 is a flowchart of another embodiment of the control method of the range extender of the vehicle provided in the application. In combination with FIG. 4, in some embodiments, the step of determining the maximum rotation speed value satisfying the target NVH standard in the preset speed range based on the current speed of the vehicle, i.e., the above-mentioned step S22, comprises:

[0056] S31: obtaining a current difference value between the current residual capacity of the battery pack of the vehicle and the target residual capacity.

[0057] The target residual capacity of the battery pack is generally the starting capacity of the range extender, i.e., the range extender works to generate power when the residual capacity of the battery pack is lower than the target residual capacity. The target residual capacity of the vehicle is related to the vehicle mode of the vehicle, and different vehicle modes can correspond to different target residual capacities. For example, when the vehicle is in a fuel priority mode, the target residual capacity can be set to 80%.

[0058] The current difference value between the current residual capacity and the target residual capacity is positive, and the greater the current difference value, the more power the range extender needs to generate.

[0059] S32: if the current difference value is greater than a preset difference value, determining the maximum rotation speed value satisfying the target NVH standard in the preset speed range based on the current speed of the vehicle through a first preset corresponding relationship.

[0060] The preset difference value can be pre-set according to actual conditions, and the setting manner is not specifically limited. In combination with the content of the above-mentioned embodiment, the preset relationship between the preset speed range, the target NVH standard and the maximum rotation speed value includes a first preset relationship and a second preset relationship in this embodiment. When the current difference value is greater than the preset difference value, the maximum rotation speed value is determined through the first preset relationship at this time.

[0061] The first preset relationship and the second preset relationship are both the relationship between the preset speed range, the target NVH standard and the maximum rotation speed value, and only the maximum rotation speed value determined by the first preset corresponding relationship is greater than the maximum rotation speed value determined by the second preset corresponding relationship under the same preset speed range and target NVH standard. It should be understood that when the current difference value is greater than the preset difference value, the range extender needs to generate more power. In order to ensure that the range extender generates more power, the maximum rotation speed value of the range extender needs to be set larger, and therefore the larger maximum rotation speed value is determined through the first preset relationship, so that the range extender can work at a larger power generation to generate more power.

[0062] S33: If the current difference value is less than or equal to the preset difference value, determining, based on the preset speed range in which the current vehicle speed is located, a maximum speed value that meets the target NVH standard in the preset speed range through a second preset corresponding relationship.

[0063] It should be understood that the step numbers in the embodiments and the arrangement order between the steps do not limit the execution order of the steps.

[0064] When the current difference value is less than or equal to the preset difference value, it indicates that the range extender needs to generate less power. Therefore, a smaller maximum speed value is determined through the second preset relationship, so that the vehicle has better NVH performance.

[0065] FIG. 5 is a flowchart of another embodiment of the control method of the vehicle range extender provided in the present application. In some embodiments, the step of determining, based on the universal characteristic data of the range extender, a power generation power point range in which the range extender meets the maximum power generation power, the maximum speed, and the target oil-electricity conversion rate, and controlling the range extender to work at a power point in the power generation power point range, i.e., the step S12 described above, includes:

[0066] S41: Determining, based on the universal characteristic data of the range extender, an initial power generation power point range in which the range extender meets the maximum power generation power, the maximum speed, and the target oil-electricity conversion rate.

[0067] In this step, the power point range that meets the maximum power generation power, the maximum speed, and the target oil-electricity conversion rate is only a target power generation power point candidate power point range, i.e., an initial power generation power point range. A unique power point needs to be determined from the initial power generation power point range as a target power generation power point in the subsequent steps.

[0068] S42: Determining, based on a requirement for any one or more of the power generation power, the speed, and the oil-electricity conversion rate of the range extender, a target power generation power point in the initial power generation power point range, and controlling the range extender to work at the target power generation power point.

[0069] After determining the initial power generation power point range as a target power generation power point candidate, this step determines the target power generation power point through a requirement for any one or more of the power generation power, the speed, and the oil-electricity conversion rate.

[0070] At this time, the target power generation power point can be determined only according to the requirement of the power generation power without considering the rotation speed and the oil-electricity conversion rate. For example, if the maximum power generation power is required, the power generation power point with the maximum power generation power is taken as the target power generation power point. The target power generation power point can be determined only according to the requirement of the oil-electricity conversion rate without considering the rotation speed and the power generation power. For example, if the maximum oil-electricity conversion rate is required, the power generation power point with the maximum oil-electricity conversion rate is taken as the target power generation power point. Or the target power generation power point is determined according to the requirements of the power generation power, the rotation speed and the oil-electricity conversion rate at the same time, and the target power generation power point determined at this time needs to meet the requirements of the three at the same time. In different application scenarios, different requirements can be provided, and therefore the way of determining the target power generation power point is also various.

[0071] FIG. 6 is a flowchart of another embodiment of the control method of the vehicle range extender provided by the present application. In combination with FIG. 6, in some embodiments, the step of determining the target power generation power point in the initial power generation power point range according to the requirement of any one or more of the power generation power, the rotation speed and the oil-electricity conversion rate of the range extender, that is, the above-mentioned step S42, comprises:

[0072] S51: obtaining a current power difference between the current power and the target power of the battery pack of the vehicle.

[0073] The current power is the current remaining power of the battery pack, and the target power is the target remaining power, and therefore the description of the current power difference can refer to the description of the current power difference in the above-mentioned embodiments.

[0074] S52: if the current power difference is greater than a preset power difference, taking the power generation power point with the maximum power generation power in the initial power generation power point range as the target power generation power point.

[0075] The current power difference is greater than the preset power difference, which indicates that the range extender generates more power. At this time, only the requirement of the power generation power is considered. At this time, the power generation power point with the maximum power generation power in the initial power generation power point range is taken as the target power generation power point, so as to ensure that the range extender works with higher power generation power to generate more power, and therefore the power preservation performance of the vehicle is better.

[0076] FIG. 7 is a flowchart of another embodiment of the control method of the vehicle range extender provided by the present application. In combination with FIG. 7, in some embodiments, after the step of obtaining the current power difference between the current power and the target power of the battery pack of the vehicle, that is, after the above-mentioned step S51, comprises:

[0077] S61: if the current power difference is less than or equal to the preset power difference, determining the rotation speed range corresponding to all power generation power points in the initial power generation power point range.

[0078] The current power difference is less than or equal to the preset power difference, indicating that the range extender needs to generate a small amount of power. At this time, only the speed and the oil-electricity conversion rate are considered.

[0079] S62: Determine a power point set in the initial power generation power point range, in which the speed is less than the average speed of the speed range, and take the power point with the highest oil-electricity conversion rate in the power point set as the target power generation power point.

[0080] In this step, the speed is prioritized, that is, a power point set in the initial power generation power point range, in which the speed is less than the average speed of the speed range, is determined. At this time, the power generation power of the power generation power points in the power point set is less than the average speed, and the speed is relatively small. Therefore, working with the power points in the power point set can actually make the vehicle have better NVH performance.

[0081] Further, the oil-electricity conversion rate is also considered, that is, the power point with the highest oil-electricity conversion rate in the power point set is taken as the target power generation power point. At this time, the oil-electricity conversion rate corresponding to the determined target power generation power point is high, so that the vehicle can have a better oil-electricity conversion rate.

[0082] FIG. 8 is a flowchart of another embodiment of the control method of the vehicle range extender provided by the present application. In combination with FIG. 8, after the step of obtaining the current power difference between the current power and the target power of the battery pack of the vehicle, that is, after the above step S51, the method comprises:

[0083] S71: If the current power difference is less than or equal to the preset power difference, determine the oil-electricity conversion rate range corresponding to all power points in the initial power generation power point range.

[0084] The current power difference is less than or equal to the preset power difference, indicating that the range extender needs to generate a small amount of power. At this time, only the speed and the oil-electricity conversion rate are considered. However, compared with the above embodiment, the oil-electricity conversion rate is considered first in this embodiment, and then the speed is considered.

[0085] S72: Determine a power point set in the initial power generation power point range, in which the oil-electricity conversion rate is greater than the average oil-electricity conversion rate of the oil-electricity conversion rate range, and take the power point with the lowest speed in the power point set as the target power generation power point.

[0086] In this step, a power point set in the initial power generation power point range, in which the oil-electricity conversion rate is greater than the average oil-electricity conversion rate of the oil-electricity conversion rate range, is determined, and the oil-electricity conversion rate is prioritized. At this time, the oil-electricity conversion rate is the average oil-electricity conversion rate when the range extender works with the power points in the power point set, so that the vehicle can have a better oil-electricity conversion rate. Then, the power point with the lowest speed in the power point set is taken as the target power generation power point, that is, the speed is considered to make the vehicle have better NVH performance.

[0087] Figure 9 is a flowchart of another embodiment of the control method of the vehicle range extender provided by the present application. In combination with Figure 9, in some embodiments, the step of determining the range of power generation points of the range extender satisfying the maximum power generation, the maximum rotation speed and the target oil-electricity conversion rate based on the universal characteristic data of the range extender, i.e., the step S12, comprises the following steps:

[0088] S81: obtaining the characteristic data of the range extender at the preset power generation points, and taking the corresponding relationship data between the preset power generation points and the characteristic data as the universal characteristic data of the range extender; wherein the preset power generation points include rotation speed and torque, and the characteristic data includes oil-electricity conversion rate data.

[0089] The preset power generation points have multiple, and the characteristic data of the range extender corresponding to each preset power generation point can be obtained through experiments, and then the corresponding relationship between the preset power generation points and the characteristic data is established to form the corresponding relationship data as the universal characteristic data of the range extender.

[0090] The step of determining the range of power generation points of the range extender satisfying the maximum power generation, the maximum rotation speed and the target oil-electricity conversion rate based on the universal characteristic data of the range extender, i.e., the step S12, comprises the following steps:

[0091] S82: determining the preset power generation points of the range extender satisfying the maximum power generation, the maximum rotation speed and the target oil-electricity conversion rate based on the universal characteristic data of the range extender, and taking the set of the preset power generation points as the range of power generation points.

[0092] In this step, the set of the preset power generation points satisfying the requirements is taken as the range of power generation points, so that the performance of each point in the range of power generation points is verified through experiments and is more in line with expectations, so that the performance of the range extender is within the expectation when the range extender works at the power generation points in the range of power generation points.

[0093] It should be understood that in combination with Figure 2, if all the power generation points in the range of power generation points determined according to the maximum power generation, the maximum rotation speed and the target oil-electricity conversion rate are taken as the target power generation points, then the finally selected target power generation points may not be the preset power generation points, which may cause the working performance of the range extender not to meet the expectations.

[0094] The second aspect of the present application provides an electronic device, comprising: a processor; a memory for storing a computer program, the computer program being executed by the processor to implement the control method of the vehicle range extender in any of the above embodiments.

[0095] Figure 10 is a structural framework diagram of an embodiment of the electronic device 500 provided by the present application.

[0096] In some specific embodiments, the electronic device 500 includes a central processing unit (CPU) 501, i.e., a processor, and a read-only memory (ROM) 502, i.e., a memory. The central processing unit 501 can perform various appropriate actions and processes according to a program stored in the read-only memory (ROM) 502 or a program loaded from the storage section 508 into a random access memory (RAM) 503, such as performing the methods in the above-described embodiments. In the RAM 503, various programs and data required for system operation are also stored. The CPU 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0097] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as necessary. A removable recording medium 511 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is attached to the drive 510 as necessary, so that a computer program read therefrom is installed into the storage section 508 as necessary.

[0098] In particular, according to embodiments of the present application, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, embodiments of the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing a computer program for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by the communication section 509, and / or installed from the removable recording medium 511. When the computer program is executed by the central processing unit (CPU) 501, various functions defined in the system of the present application are performed.

[0099] The third aspect of the present application provides a computer readable storage medium 40. FIG. 11 is a structural schematic diagram of an embodiment of the computer readable storage medium 40 provided by the present application.

[0100] The computer readable storage medium 40 stores a computer program 41, and the computer program 41 is executed by a processor to implement the control method of the vehicle range extender in any of the above embodiments.

[0101] It should be noted that the computer readable medium 40 shown in the embodiments of the present application can be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium may, for example, be an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or apparatus. In the present application, the computer readable signal medium can include a data signal carried in a baseband or as a part of a carrier wave, which carries computer readable computer programs. Such a propagated data signal can take various forms, including but not limited to an electromagnetic signal, an optical signal or any suitable combination of the above. The computer readable signal medium can also be any computer readable medium other than the computer readable storage medium, which can send, propagate or transmit programs for use by or in conjunction with an instruction execution system, device or apparatus. The computer programs contained on the computer readable medium can be transmitted by any suitable medium, including but not limited to wireless, wired, or the like, or any suitable combination of the above.

[0102] In summary, based on the control method of the vehicle range extender, the electronic device and the computer readable storage medium provided in the present application, the method comprises: acquiring a current vehicle speed of the vehicle, and determining a maximum power generation power and a maximum speed of a range extender of the vehicle based on the current vehicle speed; determining a power generation power point range of the range extender satisfying the maximum power generation power, the maximum speed and a target oil-electricity conversion rate based on the universal characteristic data of the range extender, and controlling the range extender to work at a power point in the power generation power point range. Therefore, the power generation power point range is determined based on the maximum power generation power and the maximum speed, so that when the range extender works at the power generation power point in the range, the NVH performance of the vehicle is better. Moreover, the power generation power point range is also determined based on the target oil-electricity conversion rate, so that when the range extender works at the power generation power point, the oil-electricity conversion rate of the vehicle is also better.

[0103] The above is only a preferred exemplary embodiment of the present application, and is not intended to limit the implementation of the present application. Those skilled in the art can easily make corresponding modifications or changes according to the main idea and spirit of the present application, and the protection scope of the present application should be subject to the protection scope required by the claims.

Claims

1. A control method of a vehicle range extender, characterized by, The method comprises: obtaining a current vehicle speed of the vehicle, and determining a maximum power generation of a range extender of the vehicle and a maximum rotation speed of the range extender based on the current vehicle speed; determining, based on universal characteristic data of the range extender, a power generation point range of the range extender satisfying the maximum power generation, the maximum rotation speed, and a target oil-electricity conversion rate, and controlling the range extender to work at a power point in the power generation point range.

2. The method according to claim 1, wherein the step of determining the maximum power generation of the range extender of the vehicle and the maximum rotation speed of the range extender based on the current vehicle speed comprises: determining a required power generation of the range extender of the vehicle based on the current vehicle speed, and determining a maximum power generation corresponding to a target NVH standard of the required power generation; wherein different target NVH standards correspond to different maximum power generations under the same required power generation; determining a maximum rotation speed value corresponding to the target NVH standard under a preset vehicle speed range in which the current vehicle speed is located; wherein different target NVH standards correspond to different maximum rotation speed values under the same preset vehicle speed range.

3. The method according to claim 2, wherein the step of determining the maximum rotation speed value corresponding to the target NVH standard under the preset vehicle speed range in which the current vehicle speed is located comprises: obtaining a current difference value of an electric quantity between a current residual electric quantity of a battery pack of the vehicle and a target residual electric quantity; if the current difference value of the electric quantity is greater than a preset difference value of the electric quantity, determining, by a first preset corresponding relationship, the maximum rotation speed value corresponding to the target NVH standard under the preset vehicle speed range in which the current vehicle speed is located; if the current difference value of the electric quantity is less than or equal to the preset difference value of the electric quantity, determining, by a second preset corresponding relationship, the maximum rotation speed value corresponding to the target NVH standard under the preset vehicle speed range in which the current vehicle speed is located; wherein the maximum rotation speed value determined by the first preset corresponding relationship is greater than the maximum rotation speed value determined by the second preset corresponding relationship under the same preset vehicle speed range and target NVH standard.

4. The method according to claim 1, wherein the step of determining, based on the universal characteristic data of the range extender, the power generation point range of the range extender satisfying the maximum power generation, the maximum rotation speed, and the target oil-electricity conversion rate, and controlling the range extender to work at the power point in the power generation point range comprises: determining, based on the universal characteristic data of the range extender, an initial power generation point range of the range extender satisfying the maximum power generation, the maximum rotation speed, and the target oil-electricity conversion rate; determining a target power generation point based on a requirement for any one or more of power generation, rotation speed, and oil-electricity conversion rate of the range extender in the initial power generation point range, and controlling the range extender to work at the target power generation point. ​ ​ ​ 5. The control method of claim 4, wherein the step of determining the target power generation point based on the requirement of any one or more of the power generation, the rotation speed and the oil-electric conversion rate of the range extender in the initial power generation point range comprises: obtaining a current power difference between a current power and a target power of a battery pack of the vehicle; if the current power difference is greater than a preset power difference, determining a power point with the maximum power generation in the initial power generation point range as the target power generation point.

6. The control method of claim 5, wherein after the step of obtaining the current power difference between the current power and the target power of the battery pack of the vehicle, the control method further comprises: if the current power difference is less than or equal to the preset power difference, determining a rotation speed range corresponding to all power points in the initial power generation point range; determining a power point set in which the rotation speed is less than an average rotation speed of the rotation speed range in the initial power generation point range, and determining a power point with the highest oil-electric conversion rate in the power point set as the target power generation point.

7. The control method of claim 5, wherein after the step of obtaining the current power difference between the current power and the target power of the battery pack of the vehicle, the control method further comprises: if the current power difference is less than or equal to the preset power difference, determining an oil-electric conversion rate range corresponding to all power points in the initial power generation point range; determining a power point set in which the oil-electric conversion rate is greater than an average oil-electric conversion rate of the oil-electric conversion rate range in the initial power generation point range, and determining a power point with the lowest rotation speed in the power point set as the target power generation point.

8. The control method of claim 1, wherein before the step of determining the power generation point range in which the range extender meets the maximum power generation, the maximum rotation speed and the target oil-electric conversion rate based on the universal characteristic data of the range extender, the control method further comprises: obtaining characteristic data of the range extender at a preset power generation point, and determining a corresponding relationship between the preset power generation point and the characteristic data as the universal characteristic data of the range extender; wherein the preset power generation point comprises a rotation speed and a torque, and the characteristic data comprises oil-electric conversion rate data; the step of determining the power generation point range in which the range extender meets the maximum power generation, the maximum rotation speed and the target oil-electric conversion rate based on the universal characteristic data of the range extender comprises: determining a preset power generation point in which the range extender meets the maximum power generation, the maximum rotation speed and the target oil-electric conversion rate based on the universal characteristic data of the range extender, and determining a power generation point set of the preset power generation point as the power generation point range. The control method of claim 1-8 is implemented by a processor and a memory. The memory is configured to store a computer program, and the computer program is configured to be executed by the processor to implement the control method of the range extender of the vehicle. ​ ​ 9. An electronic device, comprising: ​ ​ ​ 10. A computer-readable storage medium, characterized in that, The storage medium has stored therein a computer program, and the computer program, when executed by a processor, implements the control method of the vehicle range extender according to any one of claims 1-8.

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