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

Abstract

The application relates to the technical field of range extender control, and discloses a control method of a vehicle range extender, an electronic device and a storage medium, which comprises the following steps: determining a first power generation power of a vehicle meeting a first target NVH standard and a first target oil-electricity conversion rate standard; controlling the range extender of the vehicle to generate power at the first power generation power in a first sub-slope section, and determining an electric quantity difference between a preset threshold electric quantity and a current residual electric quantity; obtaining a second target NVH standard and a second target oil-electricity conversion rate standard according to the electric quantity difference, determining a second power generation power of the vehicle meeting the second target NVH standard and the second target oil-electricity conversion rate standard, and generating power at the second power generation power in a second sub-slope section. Therefore, the power generation process can achieve the balance between the NVH standard and the oil-electricity conversion rate. Moreover, the adjustment of the NVH standard and / or the oil-electricity conversion rate in the second sub-slope section is realized through the power generation in the first sub-slope section, so that the vehicle has good power preservation performance while the NVH standard and the oil-electricity conversion rate are taken into account.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range extender control, and particularly relates to a control method of a vehicle range extender, an electronic device and a storage medium. BACKGROUND

[0002] New energy vehicles are increasingly widely used in people's daily life. A range-extended new energy vehicle can work to generate electricity through a range extender, so as to directly supply the generated electricity to a driving motor for driving or store the generated electricity in a battery pack. Therefore, the control of the vehicle range extender directly determines the performance of the range-extended vehicle.

[0003] When the vehicle travels on an uphill section, if the range extender generates electricity, the vehicle is likely to have a large power generation, and the large power generation is likely to cause poor NVH (Noise, Vibration, Harshness) performance of the vehicle, thereby reducing the driving experience of the driver and passengers. In the related art, in order to improve the experience of the driver and passengers, the power control is used to improve the NVH experience, but the oil-electricity conversion rate of the vehicle is not considered, and the power optimization adjustment based on the historical slope section for the subsequent slope section is not considered. SUMMARY

[0004] In view of the above problems, the present application provides a control method of a vehicle range extender, an electronic device and a storage medium. The NVH standard and the oil-electricity conversion rate are introduced in the climbing power generation process, so as to balance the two. Moreover, the adjustment of the NVH standard and / or the oil-electricity conversion rate of the second sub-slope section is realized through the power generation of the first sub-slope section, so as to balance the NVH standard and the oil-electricity conversion rate while ensuring good power preservation performance of the vehicle.

[0005] The first aspect of the application provides a control method of a vehicle range extender, comprising: if a front driving road of a vehicle is a preset slope section, and the vehicle needs to generate power in a first sub-slope section of the preset slope section, determining a first power generation power of the vehicle meeting a first target NVH standard and a first target oil-electricity conversion rate standard; wherein the length of the preset slope section is greater than a preset length, the first sub-slope section has the same starting point as the preset slope section, and the vehicle generates power when the remaining power is lower than a preset threshold power; controlling the range extender of the vehicle to generate power in the first sub-slope section at the first power generation power, determining the current remaining power of the vehicle after the vehicle drives through the first sub-slope section, and determining the power difference between the preset threshold power and the current remaining power when the current remaining power is lower than the preset threshold power; adjusting the first target NVH standard and / or the first target oil-electricity conversion rate standard according to the power difference to obtain a second target NVH standard and a second target oil-electricity conversion rate standard, determining a second power generation power of the vehicle meeting the second target NVH standard and the second target oil-electricity conversion rate standard, and controlling the range extender to generate power in a second sub-slope section of the preset slope section at the second power generation power; wherein the second power generation power is greater than the first power generation power, the starting point of the second sub-slope section is the end point of the first sub-slope section, and the slope difference of the average slopes of the first sub-slope section and the second sub-slope section is less than a preset slope value.

[0006] In some embodiments, after the step of controlling the range extender to generate power in the second sub-slope section of the preset slope section at the second power generation power, the method further comprises: determining the current remaining power of the vehicle and the average slope of a third sub-slope section of the preset slope section when the vehicle drives through the second sub-slope section; wherein the first sub-slope section, the second sub-slope section, and the third sub-slope section constitute the preset slope section; if the current remaining power is greater than or equal to the preset threshold power, and the average slope of the third sub-slope section is less than the average slope of the first sub-slope section, determining a basic power generation power of the vehicle meeting the first target NVH standard and the first target oil-electricity conversion rate standard, and determining a slope compensation power according to the average slope of the third sub-slope section; taking the power sum of the basic power generation power and the slope compensation power as a target power generation power, and controlling the range extender to generate power in the third sub-slope section at the target power generation power.

[0007] In some embodiments, after the step of determining the current remaining power of the vehicle and the average slope of the third sub-slope section of the preset slope section when the vehicle drives through the second sub-slope section, the method further comprises: if the current remaining power is less than the preset threshold power, and the average slope of the third sub-slope section is greater than the average slope of the second sub-slope section, determining the current driving style of the vehicle and the current power of the accessories of the vehicle; wherein the driving style of the vehicle includes a preset gentle driving style and a preset aggressive driving style; if the current driving style is the preset aggressive driving style, and the current power of the accessories is greater than a preset power, controlling the current power of the accessories to be reduced.

[0008] In some embodiments, the step of adjusting the first target NVH standard and / or the first target oil-electric conversion rate standard to obtain the second target NVH standard and the second target oil-electric conversion rate standard according to the electric quantity difference comprises: if the electric quantity difference is less than a preset electric quantity difference, reducing the first target oil-electric conversion rate standard to obtain the second target oil-electric conversion rate standard, and taking the first target NVH standard as the second target NVH standard.

[0009] In some embodiments, the step of adjusting the first target NVH standard and / or the first target oil-electric conversion rate standard to obtain the second target NVH standard and the second target oil-electric conversion rate standard according to the electric quantity difference comprises: if the electric quantity difference is greater than or equal to the preset electric quantity difference, reducing the first target NVH standard to obtain the second target NVH standard, and taking the first target oil-electric conversion rate standard as the second target oil-electric conversion rate standard; or, if the electric quantity difference is greater than or equal to the preset electric quantity difference, reducing the first target NVH standard and the first target oil-electric conversion rate standard to obtain the second target NVH standard and the second target oil-electric conversion rate standard, respectively.

[0010] In some embodiments, the step of controlling the range extender to generate electricity at the second power generation power in the second sub-slope section of the preset slope section comprises: if the second power generation power is a target power range, controlling the range extender to generate electricity at a median power of the target power range in a first preset time period, and obtaining the residual electric quantity of the vehicle at intervals of a preset time length; wherein the electricity generation process of the second sub-slope section comprises a plurality of preset time periods, and each preset time period comprises a plurality of preset time lengths; determining a residual electric quantity change curve in the first preset time period based on the residual electric quantity, predicting a residual electric quantity change trend in a next preset time period based on the residual electric quantity change curve; when the residual electric quantity change trend is a decreasing trend, controlling the range extender to generate electricity at a power greater than the median power in the target power range in a subsequent preset time period.

[0011] In some embodiments, the step of controlling the range extender to generate electricity at the first power generation power in the first sub-slope section comprises: if the first power generation power is a power generation power range, obtaining an average slope of the first sub-slope section; if the average slope of the first sub-slope section is greater than a preset slope, controlling the range extender to generate electricity at a maximum power generation power in the power generation power range.

[0012] In some embodiments, the method further comprises: if the road ahead of the vehicle is a preset slope section, determining a predicted electric quantity of the vehicle in the first sub-slope section and a current residual electric quantity of the vehicle; predicting a predicted residual electric quantity of the vehicle after driving through the first sub-slope section according to the current residual electric quantity and the predicted electric quantity; and if the predicted residual electric quantity is less than a preset threshold electric quantity, determining that the first sub-slope section of the vehicle in the preset slope section needs to generate electricity.

[0013] The second aspect of the 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.

[0014] The third aspect of the application provides a computer readable storage medium, the storage medium stores a computer program, the computer program is executed by the processor to implement the control method of the vehicle range extender of any one of the above.

[0015] The application has at least the following beneficial technical effects: Based on the control method of the vehicle range extender, the electronic device and the storage medium provided by the application, if the front driving road of the vehicle is a preset slope section and the vehicle needs to generate power in the first sub-slope section of the preset slope section, a first power generation power is determined, which satisfies the first target NVH standard and the first target oil-electricity conversion rate standard; wherein the length of the preset slope section is greater than the preset length, the first sub-slope section has the same starting point as the preset slope section, and the vehicle generates power when the remaining power is lower than the preset threshold power; the range extender of the vehicle is controlled to generate power at the first power generation power in the first sub-slope section, and the current remaining power of the vehicle is determined after the vehicle drives through the first sub-slope section, and the power difference between the preset threshold power and the current remaining power is determined when the current remaining power is lower than the preset threshold power; the first target NVH standard and / or the first target oil-electricity conversion rate standard are adjusted according to the power difference to obtain the second target NVH standard and the second target oil-electricity conversion rate standard, and the second power generation power is determined, which satisfies the second target NVH standard and the second target oil-electricity conversion rate standard, and the range extender is controlled to generate power at the second power generation power in the second sub-slope section of the preset slope section; wherein the second power generation power is greater than the first power generation power, the starting point of the second sub-slope section is the end point of the first sub-slope section, and the slope difference of the average slope of the first sub-slope section and the second sub-slope section is less than a preset slope value. Therefore, the NVH standard and the oil-electricity conversion rate are introduced in the process of power generation while climbing, and the balance of the two can be achieved. Moreover, the adjustment of the NVH standard and / or the oil-electricity conversion rate of the second sub-slope section is realized through the power generation of the first sub-slope section, which takes into account the NVH standard and the oil-electricity conversion rate while making the vehicle have good power preservation performance.

[0016] 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

[0017] 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:

[0018] Figure 1 is a flowchart of an embodiment of the control method of the vehicle range extender provided by the present application;

[0019] Figure 2 is a feature diagram of the range extender;

[0020] Figure 3 is a flowchart of another embodiment of the control method of the vehicle range extender provided by the present application;

[0021] Figure 4 is a flowchart of still another embodiment of the control method of the vehicle range extender provided by the present application;

[0022] Figure 5 is a flowchart of still another embodiment of the control method of the vehicle range extender provided by the present application;

[0023] Figure 6 is a flowchart of still another embodiment of the control method of the vehicle range extender provided by the present application;

[0024] Figure 7 is a flowchart of still another embodiment of the control method of the vehicle range extender provided by the present application;

[0025] Figure 8 is a structural framework diagram of an embodiment of the electronic device provided by the present application;

[0026] Figure 9 is a structural framework diagram of an embodiment of the computer readable storage medium provided by the present application. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present application will be described herein below 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative labor fall within the scope of the present application.

[0028] If the description of “first”, “second” and the like is involved in the embodiments of the present application, the description of “first”, “second” and the like is only for the purpose of description, and cannot 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 be explicitly or implicitly included 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 are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0029] The first aspect of the present application provides a control method of vehicle range extender, which is applied to the new energy vehicle with range extender. The execution end of the method can be the related controller of the vehicle. Figure 1 is a flowchart of an embodiment of the control method of vehicle range extender provided by the present application, combined with Figure 1 The method comprises the following steps:

[0030] S101: If the front driving road of the vehicle is a preset slope section, and the vehicle needs to generate electricity in the first sub-slope section of the preset slope section, determine the first power generation power of the vehicle meeting the first target NVH standard and the first target oil-electricity conversion rate standard; wherein the length of the preset slope section is greater than the preset length, the first sub-slope section is the same as the starting point of the preset slope section, and the vehicle generates electricity when the remaining power is lower than the preset threshold power.

[0031] It should be understood that the determination method of the preset slope section can be set in advance. The preset slope section is an overall uphill section, and the overall slope value can be greater than a specific slope value, which can be 5°. In some application scenarios, the preset slope section can be a continuous slope section, that is, the flat road in the preset slope section is less than a specific length, for example, less than 50 meters. Moreover, the length of the preset slope section can be greater than the preset length, and the preset length can be a relatively long length, for example, 500 meters. In some application scenarios, continuous slope road can be identified through high-precision map or real-time terrain scanning (such as front-view camera + radar), and then it is judged whether the continuous slope section is the preset slope section.

[0032] In this embodiment, the preset slope section is divided into at least a first sub-slope section and a second sub-slope section. The first sub-slope section and the second sub-slope section can be divided according to length. For example, the length of the first sub-slope section and the length of the second sub-slope section can be the same, or the length of the first sub-slope section can be less than the length of the second sub-slope section. In addition, the first sub-slope section is the same as the starting point of the preset slope section, and the first sub-slope section can be considered as the front section of the preset slope section. The preset slope section can also be divided according to the predicted driving time. For example, the driving time of the first sub-slope section and the driving time of the second sub-slope section are the same, or the driving time of the first sub-slope section can be shorter than the driving time of the second sub-slope section. The driving time of the first sub-slope section and the second sub-slope section can be predicted by navigation information. The preset slope section can also be divided according to the continuity of the slope section. For example, the first sub-slope section is from the first climbing point to the first climbing end point, and the second sub-slope section is from the second climbing start point to the second climbing end point. At this time, the first sub-slope section and the second sub-slope section are connected by a flat road. In some application scenarios, the slope difference of the average slope of the first sub-slope section and the second sub-slope section can be less than a preset slope value. The preset slope value can be a small slope value, for example, 3°, 5°, etc. So that the first sub-slope section and the second sub-slope section have similar driving conditions for the vehicle. The above division method of the slope section can meet this application scenario.

[0033] In some specific application scenarios, when the sub-slope section is divided according to length, the length of the first sub-slope section can be greater than or equal to 25% of the length of the entire preset slope section, but less than or equal to 60% of the entire preset slope section. In combination with the above example, assuming that the length of the preset slope section is 500 meters, then the length of the first sub-slope section can be greater than or equal to 125 meters, but less than or equal to 300 meters. Through this division method, the length of the first sub-slope section is relatively long, and the actual driving condition has a guiding effect on the related parameter adjustment of the second sub-slope section. The length of the first sub-slope section is not too long, so that the second sub-slope section is not too short, and the guiding effect of the parameter adjustment of the second sub-slope section has practical significance. In other specific application scenarios, when the sub-slope section is divided according to length, the length of the first sub-slope section can be greater than the first length and less than the second length. The first length can be greater than or equal to 100m, and the second length can be less than or equal to 350m. So that the actual driving condition of the first sub-slope section also has a guiding effect, and the guiding effect has practical significance.

[0034] The distance between the vehicle and the start point of the preset slope section is less than a preset distance, and the front driving section of the vehicle can be considered as the preset slope section. The preset distance can be a small distance. At this time, the remaining power of the vehicle when driving the first sub-slope section without generating electricity can be predicted, and whether the vehicle needs to generate electricity in the first sub-slope section can be predicted according to the relationship between the predicted remaining power and the preset threshold power. The preset threshold power can be set according to actual needs, and the preset threshold power can be 20%, 30%, etc., which is not limited here.

[0035] The NVH performance of the vehicle affects the driving experience of the driver and passenger. When the NVH performance is good, the driving experience is better. The working process of the range extender will generate vibration, noise, etc., which will affect the NVH performance of the vehicle. Generally speaking, the higher the power of the range extender, the worse the NVH performance of the vehicle. The vehicle generally sets some NVH standards. Under the set NVH standard, there is generally a highest power generation of the range extender. The corresponding relationship between the NVH standard and the highest power generation can be set in advance according to actual needs.

[0036] Figure 2 is a feature map of the range extender. In combination with Figure 2 , the abscissa represents the speed of the range extender, and the ordinate represents the torque of the range extender. In Figure 2 , the point formed by the abscissa and the ordinate is the power generation point of the range extender (because the product of the speed and the torque of the range extender can obtain the power of the range extender).

[0037] wherein, Figure 2 different closed curves 11 are shown, the power points on each closed curve 11 have the same oil-electric conversion rate, and the power points in the same closed curve 11 have an oil-electric conversion rate higher than a certain oil-electric conversion rate. At this time, one closed curve 11 can represent one oil-electric conversion rate standard, and all power points in a specific closed curve 11 meet the oil-electric conversion rate standard corresponding to the specific closed curve 11. At this time, all power points in the same closed curve 11 will form a power range, so when the vehicle meets the first target oil-electric conversion rate standard, there will be a power range. As Figure 2 shown, a plurality of curves 12 represent power curves, the power points on the same curve 12 have the same power, and the power points in the closed curve 11 are between two specific curves 12, indicating that the power points corresponding to the closed curve 11 are located in a certain power range.

[0038] continue to combine Figure 2, curve 13 represents the NVH curve, the vibration noise decibel value of the range extender corresponding to the power point on the same curve 13 is equal, each curve 13 can represent the NVH standard of a vehicle. Therefore, the corresponding power range can be obtained through the specific NVH standard.

[0039] Of course, the above-mentioned manner is only one embodiment of determining the power range corresponding to the first target NVH standard and the first target oil-electric conversion rate standard. In other application scenarios, the power range corresponding to each NVH standard and the power range corresponding to each oil-electric conversion rate standard can be directly preset according to the characteristics of the vehicle, and then the first power generation power can be finally determined.

[0040] In summary, based on the set first target NVH standard and the first target oil-electric conversion rate standard, the first power generation power of the vehicle meeting the first target NVH standard and the first target oil-electric conversion rate standard can be determined. In some specific application scenarios, the power range corresponding to the first target NVH standard and the first target oil-electric conversion rate standard can be determined respectively, and the intersection of the two power ranges is taken as the basic power generation power range. Of course, the power generation power of the vehicle when climbing needs to consider the influence of the demand power of the vehicle, and the power generation power generally needs to be greater than or equal to the demand power, and the demand power is mainly affected by the vehicle speed and the slope. Therefore, according to the demand power of the vehicle and the basic power generation power range, the first power generation power can be determined, and at this time the first power generation power can be a power range.

[0041] In some application scenarios, when the vehicle meets the first target NVH standard, the in-vehicle noise needs to be less than 55dB, and at this time there is a first power generation power range corresponding. When the vehicle meets the first oil-electric conversion rate standard, the oil-electric conversion rate needs to reach 3.2kWh / L, and at this time there is a second power generation power range corresponding. At this time, the intersection of the first power generation power range and the second power generation power range is taken as the basic power generation power range, and the first power generation power can be determined by further combining the demand power of the vehicle and some related factors.

[0042] S102: control the range extender of the vehicle to generate power at the first power generation power in the first sub-slope section, and determine the current remaining electric quantity of the vehicle after the vehicle travels through the first sub-slope section, and determine the electric quantity difference between the preset threshold electric quantity and the current remaining electric quantity when the current remaining electric quantity is lower than the preset threshold electric quantity.

[0043] After the first power generation is determined, the range extender of the vehicle can be controlled to generate power at the first power generation in the first sub-slope section. In combination with the above, if the first power generation is the power generation range, any power generation in the power generation range can be selected to generate power, or a preset selection rule can be set, and a certain power generation in the power generation range can be selected to generate power according to the preset selection rule. At this time, the NVH performance of the vehicle can meet the first target NVH standard with a high probability, and the oil-electricity conversion rate can meet the first target oil-electricity conversion rate standard with a high probability.

[0044] After the vehicle travels through the first sub-slope section, the current residual amount of the vehicle is determined, and when the current residual amount is lower than the preset threshold amount, the amount difference between the preset threshold amount and the current residual amount is determined, so the amount difference is a positive value.

[0045] S103: Adjust the first target NVH standard and / or the first target oil-electricity conversion rate standard according to the amount difference to obtain a second target NVH standard and a second target oil-electricity conversion rate standard, determine a second power generation that meets the second target NVH standard and the second target oil-electricity conversion rate standard, and control the range extender to generate power at the second power generation in a second sub-slope section of the preset slope section; wherein the second power generation is greater than the first power generation, the second sub-slope section starts at the end of the first sub-slope section, and the slope difference between the average slopes of the first sub-slope section and the second sub-slope section is less than a preset slope value.

[0046] It should be understood that the amount difference reflects the amount of the current residual amount, and the greater the amount difference, the lower the current residual amount. In this embodiment, different adjustment strategies can be used to adjust the first target NVH standard and / or the first target oil-electricity conversion rate standard to obtain the second target NVH standard and the second target oil-electricity conversion rate standard when the current residual amount is in different ranges. Among them, adjusting the first target NVH standard and / or the first target oil-electricity conversion rate can be adjusting any one or both of the first target NVH standard and the first target oil-electricity conversion rate standard, and when only one is adjusted, the other can be directly used as the second target NVH standard or the second target oil-electricity conversion rate standard.

[0047] After the first target NVH standard and / or the first target oil-electric conversion rate standard are adjusted to obtain the second target NVH standard and the second target oil-electric conversion rate standard, a second power generation power of the vehicle meeting the second target NVH standard and the second target oil-electric conversion rate standard is determined, that is, a second power generation power of the vehicle meeting the second target NVH standard and the second target oil-electric conversion rate standard in the second sub-slope section is determined, and the range extender is controlled to generate power in the second sub-slope section at the second power generation power. The determination of the second power generation power of the vehicle meeting the second target NVH standard and the second target oil-electric conversion rate standard can refer to the description of the determination of the second power generation power of the vehicle meeting the first target NVH standard and the first target oil-electric conversion rate standard. At this time, the second power generation power is greater than the first power generation power, which can make the power generation power of the vehicle in the second sub-slope section greater, and thus the vehicle can generate more electricity, and the power preservation performance of the vehicle is better. In combination with the above content, if the second power generation power is a power range, a power greater than the first power generation power can be determined from the power range as the second power generation power.

[0048] In summary, the power generation process on the slope simultaneously introduces the NVH standard and the oil-electric conversion rate standard, and the balance between the NVH and the oil-electric conversion rate can be achieved. Moreover, the adjustment of the NVH standard and / or the oil-electric conversion rate in the second sub-slope section is realized through the power generation in the first sub-slope section, which can take into account the NVH standard and the oil-electric conversion rate standard, and make the vehicle have better power preservation performance.

[0049] Figure 3 is a flowchart of another embodiment of the control method of the vehicle range extender provided in the present application.

[0050] In combination with Figure 3 In some specific embodiments, after the step of controlling the range extender to generate power in the second sub-slope section of the preset slope section at the second power generation power, that is, after the above step S103, the method further includes:

[0051] S201: determining the current remaining power of the vehicle and the average slope of the third sub-slope section of the preset slope section when the vehicle travels through the second sub-slope section; wherein the first sub-slope section, the second sub-slope section, and the third sub-slope section constitute the preset slope section.

[0052] The average slope difference of the first sub-slope section, the second sub-slope section, and the third sub-slope section can be less than the preset slope value described above. The lengths of the first sub-slope section, the second sub-slope section, and the third sub-slope section can be the same, or the length of the first sub-slope section can be set to be less than the lengths of the second sub-slope section and the third sub-slope section, but it is not limited thereto.

[0053] S202: If the current residual electric quantity is greater than or equal to the preset threshold electric quantity, and the average gradient of the third sub-slope section is less than the average gradient of the first sub-slope section, the basic power generation of the vehicle meeting the first target NVH standard and the first target oil-electricity conversion rate standard is determined, and the gradient compensation power is determined according to the average gradient of the third sub-slope section.

[0054] If the current residual electric quantity is greater than or equal to the preset threshold electric quantity, it means that the power generation of the range extender in the second sub-slope section is relatively large, and the electric quantity of the battery pack is not in a very low state. Moreover, the average gradient of the third sub-slope section is less than the average gradient of the first sub-slope section, so it is not necessary to generate power with a large power generation in the third sub-slope section. At this time, the basic power generation determined only meets the first target NVH standard and the first target oil-electricity conversion rate standard. However, in order to prevent the vehicle from having poor power preservation performance due to the low power generation caused by the basic power generation, the embodiment further compensates the power based on the average gradient of the third sub-slope section.

[0055] It should be understood that the determination manner of the basic power generation can be determined according to the existing power generation determination manner, and only the determination process needs to consider the first target NVH standard and the first target oil-electricity conversion rate standard, so that the basic power generation meets the two standards.

[0056] S203: Taking the power sum value of the basic power generation and the gradient compensation power as the target power generation, and controlling the range extender to generate power in the third sub-slope section with the target power generation.

[0057] After obtaining the basic power generation and the gradient compensation power, this step further takes the power sum value of the basic power generation and the gradient compensation power as the target power generation, and controls the range extender to generate power in the third sub-slope section with the target power generation, so that the vehicle can meet the first target NVH standard and the first target oil-electricity conversion rate standard and has good power preservation performance.

[0058] Figure 4 is a flowchart of still another embodiment of the control method of the vehicle range extender provided in the present application.

[0059] In combination Figure 4 In some specific embodiments, after the steps of determining the current residual electric quantity of the vehicle and the average gradient of the third sub-slope section of the preset slope section when the vehicle travels through the second sub-slope section, i.e., after the above step S201, the method comprises:

[0060] S301: If the current residual electric quantity is less than the preset threshold electric quantity, and the average gradient of the third sub-slope section is greater than the average gradient of the second sub-slope section, the current driving style of the vehicle and the current power of the accessories of the vehicle are determined; wherein the driving style of the vehicle includes a preset gentle driving style and a preset intense driving style.

[0061] If the current residual electric quantity is less than the preset threshold electric quantity, it indicates that even if the power generation power is increased in the second sub-road section, the power generation quantity is still not much surplus, and the residual electric quantity of the vehicle is still small. Moreover, the average slope of the third sub-slope section is greater than the average slope of the second sub-slope section, and the power generation power required by the third sub-slope section should be higher.

[0062] The driving style of the vehicle includes a preset gentle driving style and a preset fierce driving style, which can be obtained by analyzing the driving behavior of the driver and is preset with a specific analysis method. The accessory of the vehicle can be a high-voltage accessory of the vehicle, for example, a compressor, a PTC heater and the like.

[0063] S302: If the current driving style is the preset fierce driving style, and the current power of the accessory is greater than the preset power, the current power of the accessory is controlled to be reduced.

[0064] In combination with the above, the current residual electric quantity of the vehicle is less than the preset threshold electric quantity, and the average slope of the third sub-slope section is greater than the average slope of the second sub-slope section, so that the power generation power of the vehicle in the third sub-slope section needs to be higher. Moreover, when the current driving style of the vehicle is the preset fierce driving style, the power consumption is higher than that in the preset gentle driving style. The preset power can be a relatively large power, and when the current power of the accessory is greater than the preset power, the current power of the accessory is relatively high.

[0065] Therefore, in the above case, the embodiment will control the current power of the accessory to be reduced, thereby reducing the power demand of the vehicle, and improving the power preservation performance of the vehicle.

[0066] In some specific embodiments, the step of adjusting the first target NVH standard and / or the first target oil-electric conversion rate standard to obtain the second target NVH standard and the second target oil-electric conversion rate standard according to the electric quantity difference includes: if the electric quantity difference is less than a preset electric quantity difference, reducing the first target oil-electric conversion rate standard to obtain the second target oil-electric conversion rate standard, and taking the first target NVH standard as the second target NVH standard.

[0067] It should be understood that when the electric quantity difference is less than the preset electric quantity difference, it indicates that although the current residual electric quantity is low, the current residual electric quantity will not be too low, at this time, only the first target oil-electric conversion rate standard is adjusted, and the first target NVH standard is not adjusted. In combination with the above, the first target oil-electric conversion rate standard is reduced to obtain the second target oil-electric conversion rate standard, and the first target NVH standard is taken as the second target NVH standard. Figure 2The innermost closed curve 11 represents the highest oil-electric conversion rate standard, and the outer closed curve 11 represents the oil-electric conversion rate standard gradually decreasing outward. Therefore, the power range corresponding to the lower oil-electric conversion rate standard is greater than and includes the power range corresponding to the higher oil-electric conversion rate standard, so the power range corresponding to the second target oil-electric conversion rate standard obtained after adjustment will be larger. At this time, the power range meeting the second target oil-electric conversion rate and the second target NVH standard will be larger, and then the second power generation power greater than the first power generation power can be obtained in the range.

[0068] In some embodiments, the step of adjusting the first target NVH standard and / or the first target oil-electric conversion rate standard to obtain the second target NVH standard and the second target oil-electric conversion rate standard according to the power difference value includes: if the power difference value is greater than or equal to a preset power difference value, reducing the first target NVH standard to obtain the second target NVH standard, and taking the first target oil-electric conversion rate standard as the second target oil-electric conversion rate standard; or, if the power difference value is greater than or equal to the preset power difference value, reducing the first target NVH standard and the first target oil-electric conversion rate standard to obtain the second target NVH standard and the second target oil-electric conversion rate standard, respectively.

[0069] It should be understood that if the power difference value is greater than or equal to the preset power difference value, it means that the current remaining power is low, and at this time it is urgent to increase the power generation power of the range extender, so as to ensure that the remaining power of the vehicle is not too low. In this embodiment, the first target NVH standard is adjusted to obtain the second target NVH standard, and after adjusting the NVH standard, the power range corresponding to the NVH standard will change greatly, so that the power range determined by the second target NVH standard and the second target oil-electric conversion rate standard will be larger, and then a larger second power generation power can be determined in the range, so that the range extender can generate more power to ensure the power preservation performance of the vehicle. In this embodiment, in addition to adjusting the first target NVH standard alone, the first target NVH standard and the first target oil-electric conversion rate standard can also be adjusted simultaneously.

[0070] Figure 5 is a flow diagram of another embodiment of the control method of the vehicle range extender provided by the present application.

[0071] In combination with Figure 5 In some embodiments, the step of controlling the range extender to generate power at the second power generation power in the second sub-slope section of the preset slope section includes:

[0072] S401: If the second power generation power is the target power range, control the range extender to generate power at the median power of the target power range in the second sub-slope section of the preset slope section in the first preset time period, and obtain the remaining power of the vehicle every preset time interval; wherein the power generation process of the second sub-slope section includes a plurality of preset time periods, and the preset time period includes a plurality of preset time intervals.

[0073] In combination with the above, when the second power meeting the second target NVH standard and the second target oil-electric conversion rate standard is within the target power range, a power within the target power range is selected to control the range extender to generate power. In this embodiment, the range extender generates power at the median power of the target power range in the first preset time period in the power generation process, and the residual power of the vehicle is obtained at intervals of a preset time length in the power generation process of the second sub-slope section.

[0074] S402: Determine the residual power change curve in the first preset time period based on the residual power, and predict the residual power change trend in the next preset time period based on the residual power change curve.

[0075] It should be understood that a plurality of combinations of residual power and time will be obtained in the first preset time period of the power generation process of the second sub-slope section, and the residual power change curve can be established according to these combinations. The residual power change curve shows the residual power change trend in the preset time period, which can actually predict the residual power change trend in the next preset time period. For example, if the residual power is gradually decreasing according to the residual power change curve, then the residual power change trend in the next preset time period can be a decreasing trend.

[0076] S403: When the residual power change trend is a decreasing trend, control the range extender to generate power at a power greater than the median power in the target power range in the subsequent preset time period.

[0077] When the residual power change trend is a decreasing trend, it means that if the current power generation power continues to be used for power generation, the residual power will gradually decrease in the subsequent stage. Based on this situation, in order to make the vehicle have good power preservation performance, the range extender is controlled to generate power at a power greater than the median power in the target power range in the subsequent preset time period in the power generation process of the second sub-slope section, thereby improving the power generation amount.

[0078] Figure 6 is a flowchart of another embodiment of the control method of the vehicle range extender provided by the present application.

[0079] In combination with the above, Figure 6 In some specific embodiments, the step of controlling the range extender of the vehicle to generate power at the first power in the first sub-slope section includes:

[0080] S501: If the first power is within the power generation power range, obtain the average slope of the first sub-slope section.

[0081] In combination with the above, the first power generation power satisfying the first target NVH standard and the first oil-electric conversion rate standard can be a power generation power range, and the specific power generation power is selected in the power generation power range by introducing the slope section factor.

[0082] S502: If the average slope of the first sub-slope section is greater than the preset slope, controlling the range extender of the vehicle to generate power at the maximum power generation power in the power generation power range.

[0083] When the average slope of the first sub-slope section is greater than the preset slope, it indicates that the average slope of the first sub-slope section is large, and at this time the vehicle needs to generate power at a higher power generation power, and at this time the range extender of the vehicle is controlled to generate power at the maximum power generation power in the power generation power range.

[0084] Figure 7 is a flowchart of another embodiment of the control method of the vehicle range extender provided in the present application.

[0085] In combination with the above, Figure 7 In some specific embodiments, the method further comprises:

[0086] S601: If the front driving road of the vehicle is a preset slope section, determining the predicted power consumption of the vehicle in the first sub-slope section and the current residual power of the vehicle.

[0087] Specifically, assuming that the vehicle is at the starting point of the preset slope section, the length of the first sub-slope section, the slope section, and the configuration of the vehicle can be obtained, and then the predicted power consumption of the vehicle in the first sub-slope section can be predicted according to these information, and the current residual power of the vehicle can be directly obtained.

[0088] S602: According to the current residual power and the predicted power consumption, predicting the predicted residual power of the vehicle after driving through the first sub-slope section.

[0089] By subtracting the predicted power consumption from the current residual power, the predicted residual power of the vehicle after driving through the first sub-slope section can be directly obtained.

[0090] S603: If the predicted residual power is less than a preset threshold power, it is determined that the first sub-slope section of the preset slope section of the vehicle needs to generate power.

[0091] If the predicted residual power is less than the preset threshold power, it indicates that the vehicle will reach the starting power of the range extender in the first sub-slope section, and the range extender needs to start power generation, and then it is determined that the first sub-slope section of the preset slope section of the vehicle needs to generate power.

[0092] 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.

[0093] Figure 8 is a structural schematic diagram of an embodiment of the electronic device 500 provided in the present application.

[0094] In combination Figure 8 In some embodiments, the electronic device 500 includes a central processing unit (CPU) 501, which is a processor, and a read-only memory (ROM) 502, which is 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 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.

[0095] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, and the like; an output section 507 including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), and the like, and a speaker, and the like; a storage section 508 including a hard disk, and the like; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, a modem, and the like. 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, and the like is attached to the drive 510 as necessary, so that a computer program read therefrom is installed in the storage section 508 as necessary.

[0096] 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 computer programs 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 detachable 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 executed.

[0097] The third aspect of the present application provides a computer readable storage medium 40, Figure 9 is a structural schematic diagram of an embodiment of the computer readable storage medium 40 provided by the present application.

[0098] In combination Figure 9 The computer readable storage medium 40 stores a computer program 41, and the computer program 41 is executed by the processor to realize the control method of the vehicle range extender in any of the above embodiments.

[0099] 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 thereof. The computer readable storage medium can be, for example, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any suitable combination thereof. 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present application, the computer readable storage medium can be any tangible medium that contains or stores a program used by or in connection with an instruction execution system, apparatus or device. In the present application, the computer readable signal medium can include a data signal carried in a baseband or as part of a carrier wave, in which the computer readable program is carried. Such a propagated data signal can take any of a variety of forms, including but not limited to electro-magnetic, optical, or any suitable combination thereof. The computer readable signal medium can also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate or transport a program for use by or in connection with an instruction execution system, apparatus or device. The computer program contained in the computer readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, or any suitable combination thereof.

[0100] In summary, based on the vehicle range extender control method, the electronic device and the storage medium provided in the present application, if the front driving road of the vehicle is a preset slope section and the vehicle needs to generate power in a first sub-slope section of the preset slope section, a first power generation power is determined, which meets the first target NVH standard and the first target oil-electricity conversion rate standard of the vehicle; wherein the length of the preset slope section is greater than a preset length, the first sub-slope section has the same starting point as the preset slope section, and the vehicle generates power when the remaining power is lower than a preset threshold power; the range extender of the vehicle is controlled to generate power at the first power generation power in the first sub-slope section, and after the vehicle drives through the first sub-slope section, the current remaining power of the vehicle is determined, and when the current remaining power is lower than the preset threshold power, the power difference between the preset threshold power and the current remaining power is determined; the first target NVH standard and / or the first target oil-electricity conversion rate standard are adjusted according to the power difference to obtain a second target NVH standard and a second target oil-electricity conversion rate standard, and a second power generation power is determined, which meets the second target NVH standard and the second target oil-electricity conversion rate standard of the vehicle, and the range extender is controlled to generate power at the second power generation power in a second sub-slope section of the preset slope section; wherein the second power generation power is greater than the first power generation power, and the starting point of the second sub-slope section is the end point of the first sub-slope section. Therefore, the NVH standard and the oil-electricity conversion rate are introduced in the process of power generation while climbing, and the balance of the two can be achieved. Moreover, the adjustment of the NVH standard and / or the oil-electricity conversion rate of the second sub-slope section is realized through the power generation in the first sub-slope section, so that the NVH standard and the oil-electricity conversion rate are taken into account while the vehicle has good power preservation performance.

[0101] 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: If the front driving road of the vehicle is a preset slope section, and the vehicle needs to generate electricity in a first sub-slope section of the preset slope section, a first power generation power of the vehicle meeting a first target NVH standard and a first target oil-electricity conversion rate standard is determined, wherein the length of the preset slope section is greater than a preset length, the first sub-slope section has the same starting point as the preset slope section, and the vehicle generates electricity when the remaining electric quantity is lower than a preset threshold electric quantity; The range extender of the vehicle is controlled to generate electricity at the first power generation power in the first sub-slope section, and the current remaining electric quantity of the vehicle is determined after the vehicle drives through the first sub-slope section, and the electric quantity difference between the preset threshold electric quantity and the current remaining electric quantity is determined when the current remaining electric quantity is lower than the preset threshold electric quantity; The first target NVH standard and / or the first target oil-electricity conversion rate standard are adjusted according to the electric quantity difference to obtain a second target NVH standard and a second target oil-electricity conversion rate standard, a second power generation power of the vehicle meeting the second target NVH standard and the second target oil-electricity conversion rate standard is determined, and the range extender is controlled to generate electricity at the second power generation power in a second sub-slope section of the preset slope section; wherein the second power generation power is greater than the first power generation power, the second sub-slope section has an end point being the end point of the first sub-slope section, and the slope difference of the average slopes of the first sub-slope section and the second sub-slope section is less than a preset slope value.

2. The control method of the vehicle range extender according to claim 1, wherein After the step of controlling the range extender to generate electricity at the second power generation power in the second sub-slope section of the preset slope section, the method further comprises: The current remaining electric quantity of the vehicle and the average slope of a third sub-slope section of the preset slope section are determined when the vehicle drives through the second sub-slope section, wherein the first sub-slope section, the second sub-slope section and the third sub-slope section constitute the preset slope section; If the current remaining electric quantity is greater than or equal to the preset threshold electric quantity, and the average slope of the third sub-slope section is less than the average slope of the first sub-slope section, a basic power generation power of the vehicle meeting the first target NVH standard and the first target oil-electricity conversion rate standard is determined, and a slope compensation power is determined according to the average slope of the third sub-slope section; The power sum of the basic power generation power and the slope compensation power is taken as a target power generation power, and the range extender is controlled to generate electricity at the target power generation power in the third sub-slope section.

3. The control method of the vehicle range extender according to claim 2, wherein After the step of determining the current remaining electric quantity of the vehicle and the average slope of the third sub-slope section of the preset slope section when the vehicle drives through the second sub-slope section, the method comprises: If the current remaining electric quantity is less than the preset threshold electric quantity, and the average slope of the third sub-slope section is greater than the average slope of the second sub-slope section, the current driving style of the vehicle and the current power of accessories of the vehicle are determined; wherein the driving style of the vehicle includes a preset gentle driving style and a preset fierce driving style. If the current driving style is the preset fierce driving style and the current power of the accessory is greater than the preset power, the current power of the accessory is controlled to decrease.

4. The control method of the vehicle range extender according to claim 1, wherein The step of adjusting the first target NVH standard and / or the first target HEV efficiency standard according to the power difference to obtain a second target NVH standard and a second target HEV efficiency standard comprises: If the power difference is less than a preset power difference, the first target HEV efficiency standard is decreased to obtain a second target HEV efficiency standard, and the first target NVH standard is taken as a second target NVH standard.

5. The control method of the vehicle range extender according to claim 1, wherein The step of adjusting the first target NVH standard and / or the first target HEV efficiency standard according to the power difference to obtain a second target NVH standard and a second target HEV efficiency standard comprises: If the power difference is greater than or equal to a preset power difference, the first target NVH standard is decreased to obtain a second target NVH standard, and the first target HEV efficiency standard is taken as a second target HEV efficiency standard; or, If the power difference is greater than or equal to a preset power difference, the first target NVH standard and the first target HEV efficiency standard are decreased to obtain a second target NVH standard and a second target HEV efficiency standard, respectively.

6. The control method of the vehicle range extender according to claim 1, wherein The step of controlling the range extender to generate electricity at the second power in the second sub-slope section of the preset slope section comprises: If the second power is a target power range, the range extender is controlled to generate electricity at a median power of the target power range in a first preset time period, and the residual power of the vehicle is obtained every preset time interval; wherein the electricity generation process in the second sub-slope section comprises a plurality of preset time periods, and each preset time period comprises a plurality of preset time intervals; A residual power change curve in the first preset time period is determined based on the residual power, and a residual power change trend in a next preset time period is predicted based on the residual power change curve; If the residual power change trend is a decreasing trend, the range extender is controlled to generate electricity at a power greater than the median power in the target power range in a subsequent preset time period.

7. The control method of the vehicle range extender according to claim 1, wherein The step of controlling the range extender of the vehicle to generate electricity at the first power in the first sub-slope section comprises: If the first power is a power range, an average slope of the first sub-slope section is obtained; If the average slope of the first sub-slope section is greater than a preset slope, the range extender of the vehicle is controlled to generate electricity at a maximum power in the power range.

8. The control method of the vehicle range extender according to claim 1, characterized by, The method further comprises: If the road ahead of the vehicle is a preset slope section, a predicted power consumption of the vehicle in the first sub-slope section and a current residual power of the vehicle are determined. According to the current residual electric quantity and the predicted electric quantity, a predicted residual electric quantity after the vehicle travels through the first sub-slope section is predicted; If the predicted residual electric quantity is less than the preset threshold electric quantity, it is determined that the vehicle needs to generate electricity in the first sub-slope section of the preset slope section.

9. An electronic device, comprising: Comprise: 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 according to any one of claims 1-8.

10. A computer-readable storage medium, characterized in that, The storage medium has a computer program stored therein, and the computer program is executed by the processor to implement the control method of the vehicle range extender according to any one of claims 1-8.

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