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

Abstract

The invention discloses a control method and device for a vehicle range extender, a vehicle and a storage medium. The method comprises the steps that the pure electric running remaining electric quantity value of a power battery of the vehicle and a target running road section of the vehicle are obtained; determining an expected total demand electric quantity value and an expected total generating capacity value of the vehicle based on the target driving road section; determining an expected total electric quantity difference value based on the pure electric driving residual electric quantity value, the expected total electric quantity generation value and the expected total demand electric quantity; if the expected total electric quantity difference value is larger than a first preset electric quantity value, a target power generation level is determined based on the expected total electric quantity difference value and a preset mapping relation, the target power generation level is one of a plurality of candidate power generation levels, and power generation powers corresponding to the candidate power generation levels are different; the preset mapping relation is used for indicating the mapping relation between the expected total electric quantity difference value and the candidate power generation level; and controlling a range extender of the vehicle to generate power based on the target power generation level. By applying the technical scheme, the NVH performance of the vehicle can be taken into account while the requirement for power guarantee of the vehicle can be met.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle range extender control, and in particular to a control method, device, vehicle and computer-readable storage medium for a vehicle range extender. Background Art

[0002] In the range-extended hybrid vehicles of the related art, most of them start the range extender by setting the forced start power value for controlling the forced start of the range extender. At this time, when the vehicle power is lower than or equal to the forced start power value, the range extender will generate electricity. However, in this process, it will also lead to the appearance of unfavorable factors such as poor NVH (Noise, Vibration, Harshness) performance of the vehicle, which may bring a bad experience to the user; it may also cause the power of the vehicle's power battery to continue to decrease under some extreme working conditions, and it may be unable to maintain power.

[0003] Application Contents

[0004] In view of the above problems, the present application provides a control method, device, vehicle and computer-readable storage medium for a vehicle range extender, which can ensure that the vehicle can maintain power during the entire process of driving on the target driving section while taking into account the vehicle's noise, vibration and acoustic roughness (NVH), thereby achieving global optimization of NVH.

[0005] According to one aspect of an embodiment of the present application, a control method for a vehicle range extender is provided, the method comprising: obtaining a pure electric driving remaining power value, an expected total demand power value, and an expected total power generation value of the vehicle's power battery; determining an expected total power difference based on the pure electric driving remaining power value, the expected total power generation value, and the expected total demand power; if the expected total power difference is greater than a first preset power value, determining a target power generation level based on the expected total power difference and a preset mapping relationship, the target power generation level being one of a plurality of candidate power generation levels, each of the candidate power generation levels corresponding to a different power generation power, and the preset mapping relationship being used to indicate a mapping relationship between the expected total power difference and the candidate power generation level; and controlling the vehicle's range extender to generate power based on the target power generation level.

[0006] In an optional manner, the method includes: obtaining the expected power usage value and the expected average speed value of the vehicle when traveling the target driving section; determining the expected remaining power value of the vehicle when traveling the target driving section based on the pure electric driving remaining power value and the expected power usage value; determining the expected total power generation value based on the expected remaining power value, and the comparison result of the expected average speed value and a preset speed value.

[0007] In an optional manner, the method includes: obtaining a first expected power generation value of the range extender, the first expected power generation value is the expected power generation of the range extender when the expected remaining power value is less than the forced start power value, and the forced start power value is the power critical value for forced start power generation of the range extender; obtaining a second expected power generation value of the range extender, the second expected power generation value is the expected power generation of the range extender when the expected remaining power value is greater than the dynamic start power value, and the expected average vehicle speed value is greater than the preset vehicle speed value, the dynamic start power value is the power critical value for dynamic start power generation of the range extender, and is greater than the forced start power value; obtaining a third expected power generation value of the range extender, the third expected power generation value is the expected power generation of the range extender when the expected remaining power value is between the dynamic start power value and the forced start power value, and the expected average vehicle speed value is less than the preset vehicle speed value; determining the expected total power generation value based on the first expected power generation value, the second expected power generation value, and the third expected power generation value.

[0008] In an optional manner, the method also includes: dividing the target driving section into multiple driving sub-sections; obtaining multiple sub-expected power generation values ​​based on the multiple driving sub-sections, and the sum of the multiple sub-expected power generation values ​​is equal to the expected total power generation value; if the vehicle completes one of the multiple driving sub-sections, and the current pure electric driving remaining power value of the vehicle is not equal to the expected remaining power value corresponding to the vehicle, then adjusting the sub-expected power generation value corresponding to the next driving sub-section based on the current pure electric driving remaining power value of the vehicle; adjusting the target power generation level of the range extender based on the adjusted sub-expected power generation value to increase or decrease the power generation power of the range extender.

[0009] In an optional manner, each of the candidate power generation levels includes a corresponding reference difference in electricity quantity and a power generation power: the method also includes: if the expected total electricity quantity difference corresponds to a reference difference in electricity quantity between two adjacent candidate power generation levels, then the two adjacent candidate power generation levels are determined to be a first candidate power generation level and a second candidate power generation level; a first adjustment coefficient and a second adjustment coefficient are determined based on the reference difference in electricity quantity of the first candidate power generation level, the reference difference in electricity quantity of the second candidate power generation level, and the expected total electricity quantity difference; a target power generation power corresponding to the expected total electricity quantity difference is determined based on the product of the first adjustment coefficient and the power generation power of the first candidate power generation level and the product of the second adjustment coefficient and the power generation power of the second candidate power generation level; if the vehicle starts to travel on the target driving section, the range extender is controlled to start power generation based on the target power generation power.

[0010] In an optional manner, if the vehicle starts to travel on the target driving section, congestion information of the untraveled section in the target driving section is obtained in real time; if it is determined based on the congestion information that the untraveled section is in a traffic jam condition, the target power generation level is updated.

[0011] In an optional manner, the method for obtaining congestion information of a non-traveled section in the target driving section in real time includes: dividing the target driving section into multiple driving sub-sections; and obtaining congestion information of a driving sub-section that is closest to the vehicle and is not traveled in the multiple driving sub-sections in real time.

[0012] According to another aspect of an embodiment of the present application, a control device for a vehicle range extender is provided, the device comprising: a first acquisition module, the first acquisition module, acquiring the pure electric driving remaining power value of the vehicle's power battery and the target driving section of the vehicle; a first determination module, determining the expected total demand power value and the expected total power generation value of the vehicle based on the target driving section; a second determination module, determining the expected total power difference based on the pure electric driving remaining power value, the expected total power generation value and the expected total demand power; a third determination module, if the expected total power difference is greater than a first preset power value, determining a target power generation level based on the expected total power difference and a preset mapping relationship, the target power generation level being one of a plurality of candidate power generation levels, each of the candidate power generation levels corresponding to a different power generation power, and the preset mapping relationship being used to indicate the mapping relationship between the expected total power difference and the candidate power generation level; a control module, controlling the vehicle's range extender to generate power based on the target power generation level.

[0013] According to another aspect of an embodiment of the present application, a vehicle is provided, comprising: a controller; and a memory for storing one or more programs, wherein when the one or more programs are executed by the controller, the controller implements the above-mentioned control method of the vehicle range extender.

[0014] According to another aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. The computer program includes at least one executable instruction. When the executable instruction is executed on a control device / vehicle of a vehicle range extender, the control device / vehicle of the vehicle range extender performs the operation of the above-mentioned vehicle range extender control method.

[0015] In an embodiment of the present application, after obtaining the pure electric driving remaining power value of the vehicle's power battery and the vehicle's target driving section, the vehicle's expected total power demand value and expected total power generation value can be determined according to the target driving section, and then the expected total power difference is determined according to the pure electric driving remaining power value, the expected total power generation value and the expected total power demand; and when the expected total power difference is greater than a first preset power value, the target power generation level is determined according to the expected total power difference and a preset mapping relationship, so as to generate power based on the target power generation level after the range extender is started, and ultimately the power generation of the range extender is likely to reach the expected total power demand, thereby ensuring that the vehicle can achieve power conservation and take into account the NVH performance of the vehicle throughout the process of driving the target driving section.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0018] Figure 1 A schematic block diagram of the process of steps S210 - S250 of a vehicle range extender control method provided in an embodiment of the present application is shown.

[0019] Figure 2 A schematic block diagram of the process of steps S221 - S223 of a vehicle range extender control method provided in an embodiment of the present application is shown.

[0020] Figure 3 A schematic block diagram of the process of steps S271 - S274 of a vehicle range extender control method provided in an embodiment of the present application is shown.

[0021] Figure 4 A schematic block diagram of the process of steps S241 - S243 of a vehicle range extender control method provided in an embodiment of the present application is shown.

[0022] Figure 5 A schematic diagram showing the structure of a control device for a vehicle range extender provided in the present application is shown;

[0023] Figure 6 A schematic structural diagram of an embodiment of the vehicle of the present application is shown. DETAILED DESCRIPTION

[0024] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0025] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0026] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0027] The term "multiple" as used in this application refers to two or more than two. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0028] In some related technologies, whether in fuel priority driving mode or pure electric priority driving mode, the corresponding driving mode of the extended-range vehicle will set a forced start power value to start the range extender to generate electricity when the power value of the power battery drops to or below the forced start power value. Among them, the forced start power value of the fuel priority driving mode will be greater than the forced start power value of the pure electric priority driving mode.

[0029] For example, the mandatory start power value of the fuel priority driving mode generally ranges from 70% to 80% of the full power value. If the mandatory start power value of the fuel priority driving mode is 80% of the full power value, the range extender starts to generate electricity when the power value of the power battery drops to 80% of the full power value. Correspondingly, the mandatory start power value of the pure electric priority driving mode generally ranges from 20% to 30% of the full power value. Among them, if the mandatory start power value of the pure electric priority driving mode is 20% of the full power value, the range extender starts to generate electricity when the power value of the power battery drops to 20% of the full power value.

[0030] Although after setting the forced start power value, if the power value of the vehicle's power battery drops to the forced start power value, the vehicle's range extender will be forced to start to preserve power, but in some extreme working conditions, the vehicle's power may continue to decline, and then it will be impossible to preserve power. In addition, after the range extender starts and generates electricity, it will generate certain noise and vibration, which will affect the NVH performance of the vehicle. Moreover, the greater the power generation power of the range extender, the greater the noise and the stronger the vibration, and the worse the NVH performance of the corresponding vehicle.

[0031] To solve the above problems, although in some related technologies, the corresponding driving modes of range-extended vehicles, whether in fuel priority driving mode or pure electric priority driving mode, will set a dynamic starting power value, so as to selectively start the range extender in advance to generate electricity when the power value of the power battery drops to equal to or less than the dynamic starting power value, thereby improving the vehicle's power conservation capability. However, it is still difficult to take into account both the vehicle's power conservation capability and NVH performance.

[0032] Based on this, combined Figures 1 to 6 As shown, the embodiments of the present application respectively propose a control method of a vehicle range extender, a control device 300 of a vehicle range extender, a vehicle, a computer-readable storage medium, and a computer program product to solve the above problems. These embodiments will be described in detail below.

[0033] In an exemplary embodiment of the present application, Figure 1 The schematic flow chart of steps S210-S250 of a vehicle range extender control method provided in an embodiment of the present application is shown, and the method is executed by a vehicle terminal. Figure 1 As shown, the method includes steps S210 to S250, which are described in detail as follows:

[0034] Step S210: Obtain the remaining power value of the vehicle's power battery for pure electric driving and the target driving section of the vehicle. Among them, the target driving section is the section set by the user where the vehicle is about to travel. The remaining power value for pure electric driving is the remaining power value for pure electric driving in the vehicle's pure electric priority mode or fuel priority mode. For example, the total remaining power value of the power battery in the pure electric priority mode is 70%, and the critical value of the power for forced start of the range extender is 20%. Then the calculation method of the remaining power value for pure electric driving is: 70%-20%=50%.

[0035] Step S220: Determine the expected total power demand value and the expected total power generation value of the vehicle based on the target driving section.

[0036] In an exemplary embodiment of the present application, the expected total power requirement value refers to the power value obtained by prediction that the vehicle needs to travel the target driving section. For example, after the user enters the destination in the navigation software of the mobile device or the navigation software of the vehicle terminal, the expected total power requirement value required by the power battery of the vehicle to travel the target driving section can be intelligently generated.

[0037] In an exemplary embodiment of the present application, the expected total power generation value refers to the total power value generated by the range extender during the vehicle's target driving section obtained by prediction. For example, Figure 2 A schematic flow chart of steps S221-S223 of a vehicle range extender control method provided in an embodiment of the present application is shown. Figure 2 As shown, the method for obtaining the expected total power generation value may include steps S221 to S223, which are described in detail as follows:

[0038] Step S221: Obtain the expected power usage value and the expected average vehicle speed value for the target driving section of the vehicle.

[0039] In an exemplary embodiment of the present application, the expected power usage value refers to the power value consumed by the vehicle from the start of the target driving section to the vehicle driving the target driving section to a certain halfway point. For example: if the halfway point is exactly one-third of the target driving section, then the expected power usage value is the power value consumed from the starting point of the target driving section to one-third of the target driving section; if the halfway point is exactly one-half of the target driving section, then the expected power usage value is the power value consumed from the starting point of the target driving section to one-half of the target driving section. In other words, the expected power usage value gradually changes as the vehicle travels and has no fixed value.

[0040] In an exemplary embodiment of the present application, the driving habits of the driver and passenger can be obtained based on the historical driving data of the driver and passenger, and then the expected average speed value of the vehicle traveling on the target driving section can be predicted in combination with the road conditions of the target driving section. Among them, the expected average speed value also gradually changes with the driving of the vehicle and has no fixed value, which is the same as the expected power usage value, and will not be repeated here.

[0041] Step S222: Determine the expected remaining power value for the target driving section of the vehicle based on the pure electric driving remaining power value and the expected power usage value.

[0042] In an exemplary embodiment of the present application, the expected remaining power value, like the expected power usage value, gradually changes as the vehicle travels and has no fixed value. For example, without considering the power generation of the range extender, the expected remaining power value is obtained by subtracting the expected power usage value from the remaining power value of pure electric driving. When considering the power generation of the range extender, the expected remaining power value is obtained by adding the remaining power value of pure electric driving to the power value of the power generated by the range extender and then subtracting the expected power usage value.

[0043] Step S223: When determining the expected total power generation value, it is considered that the vehicle is maintaining power while taking into account the NVH performance. Therefore, the expected total power generation value can be determined based on the expected remaining power value and the comparison result of the expected average vehicle speed value and the preset vehicle speed value, and then the power generation of the range extender is calculated when the expected remaining power value is large and the vehicle speed is high, and the power generation of the range extender is selectively calculated when the expected remaining power value is small, so as to achieve the purpose of the vehicle being able to maintain power while taking into account the NVH performance.

[0044] In an exemplary embodiment of the present application, taking into account that the vehicle can maintain power while taking into account NVH performance, the expected total power generation value can be jointly determined by the first expected power generation value, the second expected power generation value and the third expected power generation value.

[0045] In an exemplary embodiment of the present application, a method for determining an expected total power generation value based on an expected remaining power value and a comparison result between an expected average vehicle speed value and a preset vehicle speed value includes: obtaining a first expected power generation value of the range extender, the first expected power generation value being the expected power generation of the range extender when the expected remaining power value is less than the forced start power value, and the forced start power value being a critical value of power for forced start power generation of the range extender.

[0046] For example, if it is predicted that the total time during which the expected remaining power value is less than the forced start power value during the vehicle's travel on the target driving section is 1 hour, then the first expected power generation value is the power generation of the range extender when it starts generating power for 1 hour. The power generation of the range extender per hour can be specifically calculated based on the power generation power set in advance by the range extender during this process.

[0047] The method for determining the expected total power generation value based on the expected remaining power value and the comparison result of the expected average vehicle speed value and the preset vehicle speed value also includes: obtaining a second expected power generation value of the range extender, the second expected power generation value is the expected power generation of the range extender when the expected remaining power value is greater than the dynamic starting power value and the expected average vehicle speed value is greater than the preset vehicle speed value, and the dynamic starting power value is the power critical value of the dynamic starting power generation of the range extender, and is greater than the forced starting power value.

[0048] For example, if it is predicted that the expected remaining power value is greater than the dynamic starting power value during the vehicle's travel on the target driving section, and the total time that the expected average vehicle speed value is greater than the preset vehicle speed value is 1 hour, then the second expected power generation value is the power generation of the range extender when it starts to generate power for 1 hour. Among them, the power generation of the range extender per hour can be calculated based on the power generation power set in advance by the range extender during this process, and the power generation power at this time can be greater than the power generation power when the first expected power generation value is calculated.

[0049] The method for determining the expected total power generation value based on the expected remaining power value and the comparison result of the expected average vehicle speed value and the preset vehicle speed value also includes: obtaining a third expected power generation value of the range extender, the third expected power generation value being the expected power generation of the range extender when the expected remaining power value is between the dynamic starting power value and the forced starting power value, and the expected average vehicle speed value is less than the preset vehicle speed value.

[0050] For example, if the third expected power generation value is predicted to be between the dynamic start power value and the forced start power value during the vehicle's target driving section, and the total time when the expected average vehicle speed value is less than the preset vehicle speed value is 1 hour, then the third expected power generation value is the power generation of the range extender when it starts to generate power for 1 hour. In this process, the method for determining the power generation of the range extender per hour can be: by calibrating the relationship between the vehicle speed value and the power generation value of the range extender to obtain a mapping relationship table, and then when it is determined that the expected remaining power value of the vehicle is between the dynamic start power value and the forced start power value, the power generation value corresponding to the expected average vehicle speed value is determined based on the mapping relationship table, and then compared with the static power generation value, and then the maximum power value is determined. Finally, the range extender calculates the power generation of the range extender per hour based on the compared maximum power value. In this process, the static power generation value can be preset to 3KW.

[0051] In an exemplary embodiment of the present application, considering the NVH performance of the vehicle, the method for calibrating the relationship between the vehicle speed value and the power generation value can be referred to as follows: if the vehicle speed value is 10km / h, the noise of the vehicle is 60-80 decibels, and the noise emitted when the power generation power of the range extender is 5KW is also between 60-80 decibels, then when the vehicle speed value is 10km / h, the power generation power of the range extender can be 5KW. If the vehicle speed value is 20km / h, the noise of the vehicle is 90-110 decibels, and the noise emitted when the power generation power of the range extender is 8KW is also between 90-110 decibels, then when the vehicle speed value is 20km / h, the power generation power of the range extender can be 8KW, and so on.

[0052] The method for determining the expected total power generation value based on the expected remaining power value and the comparison result between the expected average vehicle speed value and the preset vehicle speed value also includes: determining the expected total power generation value based on the sum of the first expected power generation value, the second expected power generation value and the third expected power generation value.

[0053] In addition, if the expected remaining power value is greater than the dynamic starting power value, and the expected average vehicle speed value is less than the preset vehicle speed value, the expected power generation of the range extender is 0. If the expected remaining power value is between the dynamic starting power value and the forced starting power value, and the expected average vehicle speed value is greater than the preset vehicle speed value, the expected power generation of the range extender is also 0.

[0054] Step S230: Determine the expected total power difference based on the pure electric running remaining power value, the expected total power generation value and the expected total power demand.

[0055] In an exemplary embodiment of the present application, the expected total power difference is calculated as follows: expected total power difference = expected total power demand - (pure electric driving remaining power value + expected total power generation value).

[0056] Step S240: If the expected total electricity difference is greater than the first preset electricity value, the target power generation level is determined based on the expected total electricity difference and the preset mapping relationship. The target power generation level is one of multiple candidate power generation levels. The power generation power corresponding to each candidate power generation level is different. The preset mapping relationship is used to indicate the mapping relationship between the expected total electricity difference and the candidate power generation level.

[0057] In an exemplary embodiment of the present application, the first preset power value may be a negative value, thereby leaving a redundant value for the vehicle to travel on the target driving section.

[0058] For example, the first preset power value is -5% SOC, where SOC is the maximum remaining power value of the power battery.

[0059] In an exemplary embodiment of the present application, if the expected total power difference is greater than the first preset power value, it means that if the predicted expected total power generation value is followed, the vehicle may not be able to maintain power during the target driving section. Therefore, it is necessary to adjust the power generation level in the start-stop strategy of the range extender. If the expected total power difference is less than or equal to the first preset power value, it means that if the predicted expected total power generation value is followed, the vehicle can maintain power during the target driving section. Therefore, there is no need to adjust the power generation level of the start-stop strategy of the range extender.

[0060] In an exemplary embodiment of the present application, when the first preset power value is -5% SOC, a plurality of candidate power generation levels may include level 0 power generation (power generation power greater than 0), level 1 power generation, level 1.5 power generation and level 2 power generation with increasing power in sequence. The preset mapping relationship is: when the expected total power difference ΔSOC satisfies the relationship: -5% SOC≤ΔSOC≤-2% SOC, the corresponding candidate power generation level is level 0 power generation; when the expected total power difference ΔSOC satisfies the relationship: 0≤ΔSOC≤23% SOC, the corresponding candidate power generation level is level 1 power generation; when the expected total power difference ΔSOC satisfies the relationship: 28% SOC≤ΔSOC≤58% SOC, the corresponding candidate power generation level is level 1.5 power generation; when the expected total power difference ΔSOC satisfies the relationship: 60% SOC≤ΔSOC, the corresponding candidate power generation level is level 2 power generation.

[0061] Step S250: Controlling the range extender of the vehicle to generate electricity based on the target power generation level.

[0062] In this embodiment, after the target power generation level is determined, the vehicle's range extender can be controlled to generate power at the beginning of the vehicle's target driving section, and the target power generation level can be adjusted based on actual road conditions during subsequent driving.

[0063] Of course, in other embodiments, the range extender may be started based on the corresponding power generation strategy while the vehicle is traveling on the target driving section, and then the power generation level of the power generation strategy may be adjusted based on the target power generation level.

[0064] In the present application, after obtaining the pure electric driving remaining power value of the vehicle's power battery and the vehicle's target driving section, the vehicle's expected total power demand value and expected total power generation value can be determined according to the target driving section, and then the expected total power difference can be determined according to the pure electric driving remaining power value, the expected total power generation value and the expected total power demand; and when the expected total power difference is greater than the first preset power value, the target power generation level is determined according to the expected total power difference and the preset mapping relationship, so as to generate power based on the target power generation level after the range extender is started, and finally the power generation of the range extender is likely to reach the expected total power demand, so as to ensure that the vehicle can achieve power conservation and take into account the noise, vibration and acoustic roughness (NVH) of the vehicle throughout the process of driving on the target driving section, so as to achieve global optimization of NVH.

[0065] In an exemplary embodiment of the present application, since the expected total power generation value is predicted before the vehicle is driven, considering that there are uncertain factors in the actual driving process, which may lead to errors, in order to improve the accuracy of the expected power generation value, Figure 3The following is a schematic flow chart of steps S271-S274 of a method for controlling a vehicle range extender provided in an embodiment of the present application. Figure 3 As shown, after the vehicle starts to travel the target driving section. The control method of the vehicle range extender also includes steps S271 to S274, which are described in detail as follows:

[0066] Step S271: Divide the target driving section into a plurality of driving sub-sections.

[0067] In an exemplary embodiment of the present application, the target driving section can be divided into a plurality of driving sub-sections according to the mileage value of the target driving section. For example, the sum of the mileage values ​​of the plurality of driving sub-sections is equal to the total mileage value of the target driving section, and the mileage values ​​of the driving sub-sections are equal. The smaller the mileage value of the driving sub-section, the stronger the ability to improve the accuracy of the expected power generation value. The larger the mileage value of the driving sub-section, the lower the computing power consumption required by the vehicle.

[0068] In an exemplary embodiment of the present application, the target driving section can also be divided into a plurality of driving sub-sections according to the general category of the road condition of the target driving section. For example, the general category of the road condition of the target driving section (e.g., climbing section, downhill section, congested section, and horizontal section, etc.) can be obtained through navigation, and then the target driving section can be divided into a plurality of driving sub-sections based on the general category of the road condition. Accordingly, the sum of the mileage values ​​of the plurality of driving sub-sections is equal to the total mileage value of the target driving section.

[0069] Step S272: obtaining a plurality of sub-expected power generation values ​​corresponding to a plurality of driving sub-sections, wherein the sum of the plurality of sub-expected power generation values ​​is equal to the expected total power generation value.

[0070] In an exemplary embodiment of the present application, after the target driving section is divided into multiple driving sub-sections, the power generation of the range extender can be predicted for each driving sub-section separately. Among them, the method of predicting the power generation of the range extender for each driving sub-section separately can refer to steps S221-step S223, and it is only necessary to regard the target driving section in steps S221-step S223 as one of the multiple driving sub-sections. It will not be repeated here. Then the sum of the multiple sub-expected power generation values ​​is taken as the expected total power generation value of the target driving section, which can facilitate the adjustment of the expected total power generation value.

[0071] Step S273: If the vehicle has completed a driving sub-section among multiple driving sub-sections, and the current vehicle's pure electric driving remaining power value is not equal to the expected remaining power value corresponding to the vehicle, then the expected power generation value corresponding to the next driving sub-section is adjusted based on the current vehicle's pure electric driving remaining power value.

[0072] In an exemplary embodiment of the present application, a method for adjusting the sub-expected power generation value corresponding to the next driving sub-section based on the current vehicle's pure electric driving remaining power value includes: after the vehicle completes the current driving sub-section, if the vehicle's pure electric driving remaining power value is the current SOC, then the sub-expected power generation value of the next section is: current SOC-(demand power value of the current driving sub-section-sub-expected power generation value of the current driving sub-section) / maximum remaining power value of the power battery × 100%; and so on, adjusting the sub-expected power generation value corresponding to the next driving sub-section one by one.

[0073] Step S274: adjusting the target power generation level of the range extender based on the adjusted sub-expected power generation value to increase or decrease the power generation power of the range extender.

[0074] In an exemplary embodiment of the present application, after adjusting the expected total power generation value, the expected total power generation value of the remaining driving sub-segments among the multiple driving sub-segments can be determined based on the adjusted sub-expected power generation value; then the expected total required power value of the remaining driving sub-segments among the multiple driving sub-segments is re-determined, and then the relationship between the expected total power difference and the first preset power value is re-determined, and finally the target power generation level of the range extender when the vehicle travels the remaining driving sub-segments is re-determined.

[0075] For example, when adjusting the target power generation level based on the adjusted expected power generation value, the remaining driving sub-segments in the multiple driving sub-segments can be regarded as updated target driving segments, and then steps S210 to S250 can be repeated to update the target power generation level.

[0076] In an exemplary embodiment of the present application, in order to avoid the situation where the expected total power difference ΔSOC is between the intersection points of different levels, the power generation level cannot be determined, and at the same time, the power generation power of different levels varies greatly, making it impossible to control the range extender. Figure 4 The following is a schematic flow chart of steps S241-S243 of a method for controlling a vehicle range extender provided in an embodiment of the present application. Figure 4 As shown, the control method of the vehicle range extender also includes steps S241 to S243, which are described in detail as follows:

[0077] Step S241: If the expected total power difference corresponds to the power reference difference between two adjacent candidate power generation levels, the two adjacent candidate power generation levels are determined to be the first candidate power generation level and the second candidate power generation level.

[0078] For example, ΔSOC=-1.5%×the maximum remaining power value of the power battery. At this time, level 0 power generation is determined as the first candidate power generation level and level 1 power generation is determined as the second candidate power generation level.

[0079] Step S242: Determine the first adjustment coefficient and the second adjustment coefficient based on the difference between the power reference difference of the first candidate power generation level and the power reference difference of the second candidate power generation level and the difference between the power reference difference of the first candidate power generation level and the expected total power difference.

[0080] For example, the calculation method of the first adjustment coefficient K1 and the second adjustment coefficient K2 is: K1 = (ΔSOC1-ΔSOC) / (ΔSOC1-ΔSOC2), K2 = 1-K1, ΔSOC1 is the lower limit value of the power generation corresponding to the second candidate power generation level, and ΔSOC2 is the upper limit value of the power generation corresponding to the first candidate power generation level.

[0081] Step S243: determining the power generation corresponding to the expected total power difference based on the product of the first adjustment coefficient and the power generation of the first candidate power generation level and the product of the second adjustment coefficient and the power generation of the second candidate power generation level.

[0082] For example, P=K1×P1+K2×P1, where P1 and P2 are the power generation power corresponding to the first candidate power generation level and the power generation power corresponding to the second candidate power generation level, respectively.

[0083] Among them, when ΔSOC = -1.5% × the maximum remaining power of the power battery, the corresponding power generation power can be obtained according to the above calculation formula: the power generation power corresponding to the expected total power difference = 0.75 × the power generation power corresponding to the 0-level power generation level + 0.25 × the power generation power corresponding to the 1-level power generation level.

[0084] In an exemplary embodiment of the present application, in order to avoid the situation where the vehicle still cannot maintain power after the target power generation level is determined based on the expected total power difference and the preset mapping relationship, the power generation power of each candidate power generation level can be increased when the expected total power difference is greater than the second preset power value. The second preset power value is greater than the first preset power value.

[0085] For example, the second preset power value satisfies the relationship: when the target power generation level is level 2 power generation, the predicted power generation amount when the range extender travels the target driving section. Expected total power demand value - (pure electric driving remaining power value + level 2 power generation) > 0.

[0086] In an exemplary embodiment of the present application, when determining the expected total power demand value and the expected total power generation value of the vehicle, the control method also includes: if the vehicle starts to travel on the target driving section, the congestion information of the non-driving section in the target driving section is obtained in real time; if it is determined based on the congestion information that the non-driving section is in a traffic jam condition, the target power generation level is updated.

[0087] In an exemplary embodiment of the present application, congestion information can be obtained through navigation software of a vehicle-mounted terminal or a mobile device, thereby determining whether a road section where the vehicle is not traveling is in a traffic jam condition.

[0088] In an exemplary embodiment of the present application, updating the expected total power generation value and the expected total power demand value means: redetermining the expected total power generation value and the expected total power demand value in the same manner as the expected total power generation value and the expected total power demand value were initially determined.

[0089] In an exemplary embodiment of the present application, a method for obtaining congestion information of an untraveled section in a target driving section in real time includes: dividing the target driving section into multiple driving sub-sections; obtaining congestion information of a driving sub-section that is closest to the vehicle and has not been traveled in real time among the multiple driving sub-sections, so that the expected total power difference can be updated more accurately, and finally the target power generation level can be re-determined based on the updated expected total power difference, so that the vehicle controls the range extender to generate power based on the updated target power generation level.

[0090] For example, the method of updating the expected total power difference value is to regard a driving sub-section that is closest to the vehicle and has not been driven among multiple driving sub-sections as the target driving section, and then repeat steps S210-S230 to update the expected total power difference value.

[0091] For example, after the expected total power difference is updated, step S240 may be repeated to obtain an updated target power generation level.

[0092] In summary, in this application, after obtaining the pure electric driving remaining power value of the vehicle's power battery and the target driving section of the vehicle, the expected total power demand value and the expected total power generation value of the vehicle can be determined according to the target driving section, and then the expected total power difference can be determined according to the pure electric driving remaining power value, the expected total power generation value and the expected total power demand; and when the expected total power difference is greater than the first preset power value, the target power generation level is determined according to the expected total power difference and the preset mapping relationship, so as to generate power based on the target power generation level after the range extender is started, and finally the power generation of the range extender is likely to reach the expected total power demand. At the same time, during the process of the vehicle traveling on the target driving section, the target power generation level can also be continuously updated according to the congestion information of the target driving section and the pure electric driving remaining power value during the process of traveling on the target driving section, so as to ensure that the vehicle can achieve power conservation and take into account the NVH performance of the vehicle during the entire process of traveling on the target driving section.

[0093] Figure 5 FIG. 3 is a schematic diagram showing a structure of a control device 300 for a vehicle range extender provided in an embodiment of the present application. Figure 5As shown, in this embodiment, a control device 300 for a vehicle range extender is also provided, which is used to execute the control method for the vehicle range extender in the above embodiment.

[0094] like Figure 5 As shown, the control device 300 of the vehicle range extender also includes a first acquisition module 310, which is used to obtain the pure electric driving remaining power value of the vehicle's power battery and the target driving section of the vehicle.

[0095] like Figure 5 As shown, the control device 300 of the vehicle range extender also includes a first determination module 320, which is used to determine the expected total required power value and the expected total power generation value of the vehicle based on the target driving section.

[0096] like Figure 5 As shown, the control device 300 of the vehicle range extender also includes a second determination module 330, which is used to determine the expected total power difference based on the pure electric running remaining power value, the expected total power generation value and the expected total demand power.

[0097] like Figure 5 As shown, the control device 300 of the vehicle range extender also includes a third determination module 340, which is used to determine the target power generation level based on the expected total power difference and the preset mapping relationship if the expected total power difference is greater than the first preset power value. The target power generation level is one of multiple candidate power generation levels, and the power generation power corresponding to each candidate power generation level is different. The preset mapping relationship is used to indicate the mapping relationship between the expected total power difference and the candidate power generation level.

[0098] like Figure 5 As shown, the control device 300 for the vehicle range extender further includes a control module 350, and the control module 350 is used to control the vehicle range extender to generate electricity based on the target power generation level.

[0099] The control device 300 of the vehicle range extender provided in the above embodiment and the control method of the vehicle range extender provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment and will not be repeated here.

[0100] Figure 6 A schematic diagram of the structure of an embodiment of the vehicle of the present application is shown, which shows a schematic diagram of the structure of a computer system of the vehicle suitable for implementing the embodiment of the present application. The specific embodiment of the present application does not limit the specific implementation of the vehicle.

[0101] See also Figure 6As shown, the vehicle includes: a controller; a memory for storing one or more programs, and when the one or more programs are executed by the controller, the above-mentioned vehicle range extender control method is executed.

[0102] Please continue reading Figure 5 As shown, the computer system 500 of the vehicle includes a central processing unit (CPU) 501, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 502 or the program loaded from the storage part 508 to the random access memory (RAM) 503, such as executing the method in the above embodiment. Various programs and data required for system operation are also stored in RAM503. CPU501, ROM502 and RAM503 are connected to each other through bus 504. Input / output (I / O) interface 505 is also connected to bus 504.

[0103] 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 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 needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed so that a computer program read therefrom is installed into the storage section 508 as needed.

[0104] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 509, and / or installed from a removable medium 511. When the computer program is executed by a central processing unit (CPU) 501, various functions defined in the system of the present application are executed.

[0105] Another aspect of the present application further provides a computer-readable storage medium having a computer program stored thereon, which implements the above vehicle range extender control method when the computer program is executed by a processor. The computer-readable storage medium may be included in the vehicle described in the above embodiment, or may exist independently without being assembled into the vehicle.

[0106] Another aspect of the present application further provides a computer program product or a computer program, which includes at least one executable instruction, and when the executable instruction is run on the control device 300 / vehicle of the vehicle range extender, the control device 300 / vehicle of the vehicle range extender executes the above control method of the vehicle range extender.

[0107] The computer-readable medium shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, 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 (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, a device or a device or used in combination with it. In the present application, a computer-readable signal medium can include a data signal propagated in a baseband or as a part of a carrier wave, wherein a computer-readable computer program is carried. This propagated data signal can take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. A computer program contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0108] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0109] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. The names of these units do not, in some cases, constitute limitations on the units themselves.

[0110] According to one aspect of an embodiment of the present application, a computer system is also provided, including a central processing unit (CPU), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) or a program loaded from a storage portion into a random access memory (RAM), such as executing the method in the above embodiment. In RAM, various programs and data required for system operation are also stored. CPU, ROM and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0111] The following components are connected to the I / O interface: an input part including a keyboard, a mouse, etc.; an output part including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage part including a hard disk, etc.; and a communication part including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication part performs communication processing via a network such as the Internet. The drive is also connected to the I / O interface as needed. Removable media, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., are installed on the drive as needed so that the computer program read therefrom is installed into the storage part as needed.

[0112] The above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person skilled in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.

Claims

1. A control method for a vehicle range extender, characterized in that: The method comprises: Obtaining the remaining power value of the vehicle's power battery for pure electric driving and the target driving section of the vehicle; Determining an expected total power demand value and an expected total power generation value of the vehicle based on the target driving section; Determine an expected total power difference based on the pure electric running remaining power value, the expected total power generation value and the expected total power demand; If the expected total electricity difference is greater than a first preset electricity value, a target power generation level is determined based on the expected total electricity difference and a preset mapping relationship, wherein the target power generation level is one of a plurality of candidate power generation levels, each of which corresponds to a different power generation power, and the preset mapping relationship is used to indicate a mapping relationship between the expected total electricity difference and the candidate power generation level; A range extender of the vehicle is controlled to generate electricity based on the target power generation level.

2. The method according to claim 1, characterized in that The method comprises: Obtaining an expected power usage value and an expected average vehicle speed value for the vehicle traveling on the target driving section; Determining an expected remaining power value of the vehicle during the process of traveling the target driving section based on the pure electric running remaining power value and the expected power usage value; The expected total power generation value is determined based on the expected remaining power value and a comparison result between the expected average vehicle speed value and a preset vehicle speed value.

3. The method according to claim 2, characterized in that The method comprises: Acquire a first expected power generation value of the range extender, the first expected power generation value being the expected power generation of the range extender when the expected remaining power value is less than the forced start power value, and the forced start power value is a power critical value for forced start power generation of the range extender; Obtaining a second expected power generation value of the range extender, the second expected power generation value being the expected power generation of the range extender when the expected remaining power value is greater than the dynamic starting power value and the expected average vehicle speed value is greater than the preset vehicle speed value, and the dynamic starting power value is a critical value of power for dynamic starting power generation of the range extender and is greater than the forced starting power value; Acquire a third expected power generation value of the range extender, the third expected power generation value being the expected power generation of the range extender when the expected remaining power value is between the dynamic start power value and the forced start power value and the expected average vehicle speed value is less than the preset vehicle speed value; The expected total power generation amount value is determined based on the first expected power generation amount value, the second expected power generation amount value, and the third expected power generation amount value.

4. The method according to claim 2, characterized in that The method further comprises: Dividing the target driving section into a plurality of driving sub-sections; Acquire a plurality of sub-expected power generation values ​​corresponding to a plurality of driving sub-segments, wherein the sum of the plurality of sub-expected power generation values ​​is equal to the expected total power generation value; If the vehicle has traveled through one of the plurality of driving sub-segments, and the current pure electric driving remaining power value of the vehicle is not equal to the expected remaining power value corresponding to the vehicle, then adjusting the sub-expected power generation value corresponding to the next driving sub-segment based on the current pure electric driving remaining power value of the vehicle; The target power generation level of the range extender is adjusted based on the adjusted sub-expected power generation amount value to increase or decrease the power generation power of the range extender.

5. The method according to claim 2, characterized in that Each of the candidate power generation levels includes a corresponding reference difference in power and power generation power. The method further includes: If the expected total power difference is located between the power reference difference of two adjacent candidate power generation levels, the two adjacent candidate power generation levels are determined to be the first candidate power generation level and the second candidate power generation level; Determine a first adjustment coefficient and a second adjustment coefficient based on the reference difference value of the power of the first candidate power generation level, the reference difference value of the power of the second candidate power generation level, and the expected total power difference value; The target power generation power corresponding to the expected total power difference is determined based on the first adjustment coefficient, the power generation power of the first candidate power generation level, the second adjustment coefficient, and the power generation power of the second candidate power generation level.

6. The method according to claim 1, characterized in that The method comprises: If the vehicle starts to travel on the target travel section, congestion information of the untraveled section in the target travel section is obtained in real time; If the congestion information indicates that the non-traveled road section is in a traffic jam condition, the target power generation level is updated.

7. The method according to claim 6, characterized in that The method for obtaining the congestion information of the non-traveled section in the target travel section in real time comprises: Dividing the target driving section into a plurality of driving sub-sections; The congestion information of a driving sub-section among the multiple driving sub-sections which is closest to the vehicle and on which the vehicle has not been driving is obtained in real time.

8. A control device for a vehicle range extender, characterized in that: The device comprises: A first acquisition module is used to acquire the remaining power value of the vehicle's power battery for pure electric driving and the target driving section of the vehicle; A first determination module determines an expected total power demand value and an expected total power generation value of the vehicle based on the target driving section; A second determination module determines an expected total power difference based on the pure electric running remaining power value, the expected total power generation value and the expected total power demand; A third determination module, if the expected total power difference is greater than a first preset power value, determines a target power generation level based on the expected total power difference and a preset mapping relationship, wherein the target power generation level is one of a plurality of candidate power generation levels, each of which corresponds to a different power generation power, and the preset mapping relationship is used to indicate a mapping relationship between the expected total power difference and the candidate power generation level; A control module controls a range extender of the vehicle to generate electricity based on the target power generation level.

9. A vehicle, characterized in that: include: Controller; A memory for storing one or more programs, which, when executed by the controller, enables the controller to implement the control method of the vehicle range extender according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, which includes at least one executable instruction. When the executable instruction is executed on the control device / vehicle of the vehicle range extender, the control device / vehicle of the vehicle range extender performs the operation of the control method of the vehicle range extender according to any one of claims 1 to 7.

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