Vehicle range extender control method and device, electronic equipment and storage medium

Abstract

The invention relates to the technical field of vehicle range extending control, and discloses a control method and device for a vehicle range extender, electronic equipment and a storage medium, and the method comprises the steps: obtaining power generation working points corresponding to the range extender in different preset environment temperature ranges when a vehicle meets different preset NVH standards, and building a corresponding relation; when it is detected that the vehicle needs to work to generate power through a range extender in the remaining mileage and the remaining electric quantity of a battery pack of the vehicle is smaller than the preset starting electric quantity, the current preset NVH standard and the current environment temperature of the vehicle are determined; and determining a corresponding target power generation working point according to the current preset NVH standard, the current environment temperature and the corresponding relation, and controlling the range extender to work for power generation based on the power generation power corresponding to the target power generation working point and the rotating speed. Therefore, when the electric quantity of the vehicle is lower than a higher preset starting electric quantity, the range extender works at the target power generation point corresponding to the current NVH standard, so that the NVH performance of the vehicle is better, and the power generation amount required by the vehicle in the remaining mileage can be basically 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, electronic device and storage medium for a vehicle range extender. Background Art

[0002] When the battery pack of a range-extended new energy vehicle is below a certain threshold, the range extender will generate electricity to power the drive motor and / or charge the battery pack. During the power generation process, the range extender will generate large vibrations and noise, which will greatly affect the NVH (Noise, Vibration, Harshness) performance of the vehicle.

[0003] At present, the operation process of the vehicle range extender generally results in poor NVH performance of the vehicle, especially when the battery pack power is low and the range extender operates at a larger power generation power, the NVH performance of the vehicle is particularly poor, seriously affecting the user's driving experience. Summary of the invention

[0004] In view of the above problems, the present application provides a control method, device, electronic device and storage medium for a vehicle range extender. When the vehicle's power level is lower than a higher preset starting power level, the range extender operates at a target power generation point corresponding to the current NVH standard, so that the vehicle's NVH performance is better and can basically meet the power generation required for the vehicle's remaining mileage.

[0005] In a first aspect, the present application provides a control method for a vehicle range extender, comprising: obtaining the power generation operating points corresponding to the range extender under different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establishing a corresponding relationship; wherein the power generation operating point includes power generation power and rotation speed; when it is detected that the vehicle needs to generate power through the range extender in the remaining mileage, and the remaining power of the vehicle's battery pack is less than the preset starting power, the current preset NVH standard and the current ambient temperature of the vehicle are determined; wherein the preset starting power is greater than the preset power value; according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, the corresponding target power generation operating point is determined, and the range extender is controlled to generate power based on the power generation power and rotation speed corresponding to the target power generation operating point.

[0006] In some specific embodiments, the steps of obtaining the power generation operating points corresponding to the range extender in different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establishing a corresponding relationship include: obtaining the first power generation operating points corresponding to the range extender in different preset ambient temperature ranges when the vehicle meets different preset NVH standards under idle conditions, and establishing a first corresponding relationship between the preset NVH standard, the preset ambient temperature range and the first power generation operating point; obtaining the second power generation operating points corresponding to the range extender in different combinations of preset ambient temperature ranges and preset vehicle speed ranges when the vehicle meets different preset NVH standards under driving conditions, and establishing a second corresponding relationship between the preset NVH standard, the preset ambient temperature range, the preset vehicle speed range and the second power generation operating point.

[0007] In some specific embodiments, the steps of determining a corresponding target power generation operating point according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, and controlling the range extender to operate and generate power based on the power generation power and speed corresponding to the target power generation operating point include: when it is detected that the vehicle is in an idling condition, determining a corresponding first target power generation operating point according to the current preset NVH standard, the current ambient temperature and the first corresponding relationship, and controlling the range extender to operate and generate power based on the power generation power and speed corresponding to the first target power generation operating point; when it is detected that the vehicle is in a driving condition, obtaining the current speed of the vehicle, and determining a corresponding second target power generation operating point according to the current preset NVH standard, the current ambient temperature, the current vehicle speed and the second corresponding relationship, and controlling the range extender to operate and generate power based on the power generation power and speed corresponding to the second target power generation operating point.

[0008] In some specific embodiments, the step of controlling the range extender to generate electricity based on the power generation power and speed corresponding to the first target power generation operating point includes: obtaining the power difference between the current remaining power of the vehicle's battery pack and the target remaining power; wherein the target remaining power is preset; if it is detected that the power difference is greater than the preset power difference, the range extender is controlled to generate electricity by the power generation power and speed of the first target power generation operating point within the first power generation range; if it is detected that the power difference is less than or equal to the preset power difference, the range extender is controlled to generate electricity by the power generation power and speed of the first target power generation operating point within the second power generation range; wherein the power generation power range corresponding to the first target power generation operating point is divided into at least a first power generation range and a second power generation range, and the average power generation power in the first power range is greater than the average power generation power in the second power range.

[0009] In some specific embodiments, the step of controlling the range extender to generate electricity based on the power generation power and speed corresponding to the second target power generation operating point includes: when it is detected that the current vehicle speed is greater than the median vehicle speed of the current vehicle speed range, the range extender is controlled to generate electricity by the power generation power and speed of the second target power generation operating point within the third power generation range; when it is detected that the current vehicle speed is less than or equal to the median vehicle speed of the current speed range, the range extender is controlled to generate electricity by the power generation power and speed of the second target power generation operating point within the fourth power generation range; wherein the power generation power range corresponding to the second target power generation operating point is divided into at least a third power generation range and a fourth power generation range, and the average power generation power of the third power generation range is greater than the average power generation power of the fourth power generation range.

[0010] In some specific embodiments, before the step of detecting that the vehicle needs to generate electricity through the range extender in the remaining mileage, the method includes: obtaining the predicted vehicle speed and predicted ambient temperature corresponding to each sub-section of the vehicle in the remaining mileage; wherein the remaining mileage is composed of multiple sub-sections; determining the predicted power consumption corresponding to the sub-section based on the predicted vehicle speed and the predicted ambient temperature, and taking the sum of the predicted power consumption corresponding to all sub-sections as the predicted total power consumption of the remaining mileage; wherein different combinations of vehicle speed ranges and ambient temperature ranges correspond to different predicted power consumptions. Determine whether the vehicle needs to generate electricity through the range extender in the remaining mileage based on the predicted total power consumption.

[0011] In some specific embodiments, the step of controlling the range extender to generate electricity based on the power generation power and speed corresponding to the second target power generation operating point includes: when it is detected that the remaining power of the vehicle's battery pack is greater than a preset minimum power, controlling the range extender to generate electricity based on the power generation power and speed corresponding to the second target power generation operating point; wherein the preset minimum power is lower than the preset starting power; when it is detected that the remaining power of the battery pack is less than or equal to the preset minimum power, determining the preset power generation operating point of the range extender according to the current vehicle speed, and controlling the range extender to generate electricity based on the power generation power and speed corresponding to the preset power generation operating point; wherein there is a preset relationship between the preset power generation operating point and the vehicle speed, and the power generation power of the preset power generation operating point is greater than the power generation power of the second target power generation operating point at the same vehicle speed.

[0012] A second aspect of the present application provides a control device for a vehicle range extender, comprising: an acquisition module, for acquiring the power generation operating points corresponding to the range extender under different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establishing a corresponding relationship; wherein the power generation operating point includes power generation power and rotation speed; a control module, for detecting that the vehicle needs to generate power through the range extender in the remaining mileage, and the remaining power of the vehicle's battery pack is less than the preset starting power, then determining the current preset NVH standard and current ambient temperature of the vehicle; wherein the preset starting power is greater than the preset power value; determining the corresponding target power generation operating point according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, and controlling the range extender to generate power based on the power generation power and rotation speed corresponding to the target power generation operating point.

[0013] A third aspect of the present application provides an electronic device, comprising: a processor; and a memory for storing a computer program, wherein when the computer program is executed by the processor, any of the above-mentioned vehicle range extender control methods is implemented.

[0014] A fourth aspect of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, a control method for a vehicle range extender as described above is implemented.

[0015] The present application has at least the following beneficial technical effects: Based on the control method, device, electronic device and storage medium of the vehicle range extender provided by the present application, including: obtaining the power generation working points corresponding to the range extender under different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establishing corresponding relationships; wherein the power generation working point includes power generation power and speed; when it is detected that the vehicle needs to generate power through the range extender in the remaining mileage, and the remaining power of the vehicle's battery pack is less than the preset starting power, the current preset NVH standard and the current ambient temperature of the vehicle are determined; wherein the preset starting power is greater than the preset power value; according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, the corresponding target power generation working point is determined, and the power generation power and speed corresponding to the target power generation working point are controlled to generate power by the range extender. Therefore, when the vehicle is lower than a higher preset starting power, the range extender will work at the target power generation point corresponding to the current NVH standard, so that the NVH performance of the vehicle is better and can basically meet the power generation required by the vehicle for the remaining mileage.

[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 It is a flow chart of an embodiment of a control method for a vehicle range extender provided by the present application;

[0019] Figure 2 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application;

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

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

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

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

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

[0025] Figure 8 It is a structural block diagram of an embodiment of a control device for a vehicle range extender provided by the present application;

[0026] Fig. 9 It is a schematic diagram of the structural framework of an embodiment of the electronic device provided by the present application;

[0027] Fig.10 It is a schematic diagram of the structural framework of an embodiment of the computer-readable storage medium provided by the present application. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0029] If there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] The first aspect of the present application provides a control method for a vehicle range extender. Figure 1 1 is a flow chart of an embodiment of a control method for a vehicle range extender provided by the present application. Figure 1 , the method comprises the following steps:

[0031] S11: Obtain the power generation operating points corresponding to the range extender under different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establish a corresponding relationship; wherein the power generation operating point includes power generation power and rotation speed.

[0032] There may be multiple preset NVH standards, and different preset NVH standards correspond to different NVH performance requirements. For example, a higher preset NVH standard corresponds to a higher NVH performance requirement, and the vehicle needs to have better NVH performance to meet the preset NVH standard.

[0033] It should be understood that when the range extender is working, the ambient temperature will affect the NVH performance of the vehicle. Even if the range extender is working at the same power generation operating point, the NVH performance of the vehicle may be different. Therefore, in the embodiment, under the preset NVH standard, the power generation operating points corresponding to the range extender under different preset ambient temperature ranges are obtained, thereby fully considering the impact of the ambient temperature on the NVH performance of the vehicle when the range extender is working.

[0034] Specifically, since there are multiple preset NVH standards, it is necessary to obtain the corresponding power generation operating points under different ambient temperatures under each NVH standard. For example, the preset NVH standard includes a first preset NVH standard and a second preset NVH standard, and the ambient temperature range includes a first ambient temperature range, a second ambient temperature range, and a third ambient temperature range. Then, it is necessary to obtain the power generation operating points corresponding to the first ambient temperature range, the second ambient temperature range, and the third ambient temperature range under the first preset NVH standard. And obtain the power generation operating points corresponding to the first ambient temperature range, the second ambient temperature range, and the third ambient temperature range under the second preset NVH standard. Among them, in order for the obtained power generation operating points to cover a wider range of application scenarios, the number of preset NVH standards and preset ambient temperature ranges can be set to multiple to obtain more power generation operating points. In addition, the difference between different preset NVH standards can be set to be smaller, and the range value of the preset ambient temperature range can be set to be smaller, so as to obtain more detailed power generation operating point data.

[0035] In this step, after obtaining the corresponding power generation operating points of the range extender under different preset ambient temperature ranges that meet different preset NVH standards, the corresponding relationship between these data will also be established. That is, the corresponding relationship including NVH standards, preset ambient temperature ranges and power generation operating points is established for easy use in subsequent processes.

[0036] It should be understood that the power generation working point can be obtained and saved in advance through vehicle testing, and then these data can be directly applied in the subsequent process. Since the power generation working point includes the power generation power and the speed, the working torque of the range extender can be further determined according to the power generation power and the speed, and then the range extender can be controlled according to the speed and torque corresponding to the power generation working point.

[0037] S12: When it is detected that the vehicle needs to generate electricity through the range extender within the remaining mileage, and the remaining power of the vehicle's battery pack is less than the preset starting power, the current preset NVH standard of the vehicle and the current ambient temperature are determined; wherein the preset starting power is greater than the preset power value.

[0038] Specifically, the navigation function can be used during vehicle operation, and then the relevant information of the remaining mileage of the vehicle can be obtained based on the navigation function, such as the remaining mileage distance, predicted vehicle speed, etc. Based on the relevant information of the remaining mileage, it can be combined with the vehicle's own performance and preset rules to determine whether the power of the battery pack can meet the vehicle's driving needs in the remaining mileage, and then determine whether the vehicle needs to generate electricity through the range extender in the remaining mileage.

[0039] When it is detected that the vehicle needs to generate electricity through the range extender in the remaining mileage, the vehicle needs to start the range extender to generate electricity during the subsequent driving process. The preset starting power is the power to start the range extender. When the power of the battery pack is lower than the preset starting power, the range extender will be started to generate electricity. In this embodiment, the preset starting power is set to be greater than the preset power value. The preset starting power can be set to be larger, so that the range extender will work to generate electricity when the battery pack has a higher power.

[0040] It should be understood that the power generation working point obtained in the above steps meets the preset NVH standard. Although the NVH performance of the range extender is good when it works at this power generation working point, the power generation power of the range extender is generally small. In this embodiment, the preset starting power is set to be larger, so that the range extender can work as much as possible, thereby ensuring that the power generated by the range extender meets the power generation demand for the range extender in the remaining mileage.

[0041] In some specific application scenarios, the preset starting power can be set to 80%, and the preset power value can be set to 70%, but it is not limited to this. In contrast, in the prior art, the starting power corresponding to the range extender is generally set to a relatively small value, such as 20%, 30%, etc. Based on this setting method, the range extender will only work when the battery pack has a low power level. At this time, the power of the range extender is generally large, resulting in poor NVH performance of the vehicle.

[0042] In this step, when it is determined that the range extender needs to work to generate electricity, the vehicle's current preset NVH standard and the current ambient temperature will be determined, so as to facilitate the determination of the range extender's power generation operating point in the subsequent process. Among them, the current preset NVH standard is one of the preset NVH standards described above. The user can select one from multiple preset NVH standards as the current preset NVH standard. At this time, the vehicle needs to meet the current preset NVH standard. Alternatively, when the vehicle is in different modes, there will be different current preset NVH standards. The user can select the current preset NVH standard by selecting the vehicle mode. Among them, the current ambient temperature can be obtained through a temperature sensor, or through weather information, without specific restrictions.

[0043] In some specific embodiments, an NVH priority mode can be set. When the user starts this mode, this step will be executed, and the operation of the range extender will be ultimately controlled at the target power generation operating point, thereby improving the NVH performance of the vehicle.

[0044] S13: Determine a corresponding target power generation operating point according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, and control the range extender to generate electricity based on the power generation power and speed corresponding to the target power generation operating point.

[0045] In combination with the above content, since the correspondence between the NVH standard, the preset ambient temperature range and the power generation operating point has been obtained and saved, this step further determines the corresponding power generation operating point based on the current preset NVH standard, the current ambient temperature and the correspondence. The determined power generation operating point is the target power generation operating point.

[0046] In combination with the above content, it is assumed that under the first preset NVH standard, within the first preset temperature range, the first power generation operating point corresponds. At this time, if the current preset NVH standard is the first preset NVH standard and the current ambient temperature is within the first preset ambient temperature range, then the first power generation operating point determined according to the corresponding relationship is the target power generation operating point.

[0047] In combination with the above, the target power generation operating point determined at this time meets the current preset NVH standard. Therefore, when the range extender generates power based on the power generation and speed corresponding to the target power generation operating point, the NVH performance of the vehicle can generally meet the current preset NVH standard. In addition, in combination with the above, since the range extender will work when the power is lower than a larger preset starting power, the range extender can generate sufficient power. Therefore, the control method of the vehicle range extender based on this embodiment can make the vehicle have better NVH performance and sufficient power generation in the remaining mileage.

[0048] Figure 2 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 2 In some specific embodiments, the step of obtaining the power generation operating points corresponding to the range extender under different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establishing a corresponding relationship, that is, the above-mentioned step S11, includes:

[0049] S21: Obtaining first power generation operating points corresponding to the range extender in different preset ambient temperature ranges when the vehicle meets different preset NVH standards under idle conditions, and establishing a first corresponding relationship between the preset NVH standard, the preset ambient temperature range and the first power generation operating point.

[0050] This embodiment provides a specific method for establishing the corresponding relationship when the vehicle is in an idling condition and a driving condition.

[0051] When the vehicle is in an idle state, the vehicle speed is 0. At this time, under the preset NVH standard, the corresponding power generation operating point is obtained only through the preset ambient temperature range. At this time, the corresponding relationship is expressed as a first corresponding relationship, which includes three elements: the preset NVH standard, the preset ambient temperature range, and the first power generation operating point.

[0052] The following table is a schematic diagram of the first corresponding relationship under idle conditions:

[0053]

[0054] Among them, this table corresponds to a specific preset NVH standard, and the first row is the preset temperature range (only one end value of the temperature range is shown), and the second row is the power generation power and speed of the range extender.

[0055] S22: Obtain the second power generation operating points corresponding to the range extender under different combinations of preset ambient temperature ranges and preset vehicle speed ranges when the vehicle meets different preset NVH standards under driving conditions, and establish a second corresponding relationship between the preset NVH standard, the preset ambient temperature range, the preset vehicle speed range and the second power generation operating point.

[0056] When the vehicle is in a driving condition, the vehicle speed is greater than 0 or greater than a smaller preset value. At this time, under the preset NVH standard, the corresponding power generation operating point is obtained through the preset ambient temperature range and the preset vehicle speed range. At this time, the corresponding relationship is expressed as a second corresponding relationship, which includes three elements: the preset NVH standard, the preset ambient temperature range, the preset vehicle speed range, and the second power generation operating point.

[0057] The following table is a schematic diagram of the second corresponding relationship under driving conditions:

[0058]

[0059] Among them, this table corresponds to a specific preset NVH standard, and the first row represents the preset vehicle speed range, and the first column represents the ambient temperature range (the ambient temperature range only shows one value of the temperature interval). From this table, you can get the power generation operating point corresponding to a preset vehicle speed range and a preset ambient temperature range under the specific preset NVH standard. For example, in the preset vehicle speed range of 40-80km / h and the preset ambient temperature range corresponding to the ambient temperature of 0°, the corresponding second power generation operating point has a power generation power of 16kw and a speed of 1700rpm.

[0060] It should be understood that although this embodiment provides two ways of acquiring corresponding relationships, the above-mentioned steps S21 and S22 do not limit the execution order. In addition, this embodiment defines that the above-mentioned step S11 includes step S21 and step S22, which can be: the above-mentioned step S11 includes step S21, or includes step S22, or includes step S21 and step S22 at the same time. At this time, acquiring the corresponding relationship can be acquiring the first corresponding relationship, or acquiring the second corresponding relationship, or acquiring the first corresponding relationship and the second corresponding relationship at the same time.

[0061] Figure 3 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 3In some specific embodiments, the corresponding target power generation operating point is determined according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, and the step of controlling the range extender to generate power based on the power generation power and speed corresponding to the target power generation operating point, that is, the above step S13, includes:

[0062] S31: When it is detected that the vehicle is in an idle condition, a corresponding first target power generation operating point is determined according to the current preset NVH standard, the current ambient temperature and the first corresponding relationship, and the range extender is controlled to generate power based on the power generation power and speed corresponding to the first target power generation operating point.

[0063] Corresponding to the first corresponding relationship of the idle condition in the above embodiment, this step determines the corresponding first target power generation operating point according to the current preset NVH standard, the current ambient temperature and the first corresponding relationship, and then realizes the control of the range extender based on the first target power generation operating point.

[0064] S32: When it is detected that the vehicle is in a driving condition, the current speed of the vehicle is obtained, and the corresponding second target power generation operating point is determined according to the current preset NVH standard, the current ambient temperature, the current vehicle speed and the second corresponding relationship, and the range extender is controlled to generate electricity based on the power generation power and speed corresponding to the second target power generation operating point.

[0065] Corresponding to the second corresponding relationship of the driving conditions in the above embodiment, this step determines the corresponding second target power generation operating point according to the current vehicle speed, the current preset NVH standard, the current ambient temperature, the current vehicle speed and the second corresponding relationship, and then controls the range extender based on the second target power generation operating point.

[0066] Similarly, step S31 and step S32 in this embodiment do not limit the order of execution. For step S13 including step S31 and step S32, it can be specifically: step S13 includes step S31, or includes step S32, or includes step S31 and step S32 at the same time. Corresponding to the above embodiments, since the various embodiments can be combined with each other, when the corresponding relationship is the first corresponding relationship, step S13 can include step S31; when the corresponding relationship is the second corresponding relationship, step S13 can include step S32; when the corresponding relationship includes the first corresponding relationship and the second corresponding relationship, step S13 can include step S31 and step S32 at the same time.

[0067] Figure 4 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 4 Based on the contents of the above embodiments, in some specific embodiments, the step of controlling the range extender to generate electricity based on the power generation and speed corresponding to the first target power generation operating point includes:

[0068] S41: Obtaining the power difference between the current remaining power of the battery pack of the vehicle and the target remaining power; wherein the target remaining power is preset.

[0069] When the vehicle is in an idling condition and a first target power generation operating point is obtained, this embodiment specifically defines the steps of controlling the range extender to generate power based on the power generation power and speed corresponding to the first target power generation operating point.

[0070] It should be understood that the target remaining power is the power that the battery pack needs to reach after the range extender generates electricity, and the target remaining power is higher than the preset starting power. The difference between the current remaining power and the target remaining power will reflect how much power the range extender needs to generate. The larger the power difference, the more electricity the range extender needs to generate. The amount of electricity that the range extender needs to generate is actually related to the power generation power of the range extender. The more electricity the range extender needs to generate, the higher the power generation power of the range extender should be to meet the power generation needs of the range extender.

[0071] S42: When it is detected that the power difference is greater than the preset power difference, the range extender is controlled to generate power by using the power generation power and the rotation speed of a first target power generation operating point within a first power generation range.

[0072] The preset power difference can be set according to the actual situation. When it is detected that the power difference is greater than the preset power difference, it means that the range extender needs to generate more electricity. At this time, the range extender is controlled to generate electricity by the power generation power and the speed of the first target power generation working point within the first power generation range, so as to ensure that the range extender generates more electricity to meet the power generation demand.

[0073] It should be understood that the number of first target power generation operating points determined based on the ambient temperature range is generally large, and these first target power generation operating points will constitute a set. The first target power generation operating point in this set will correspond to a power generation range, and we will select the first target power generation operating point with a power generation range within the first power generation range to control the range extender. Among them, the power generation range corresponding to the first target power generation operating point is divided into at least a first power generation range and a second power generation range, and the average power generation power of the first power generation range is greater than the average power generation power of the second power generation range. Therefore, the range extender operates at the first target power generation operating point with a power generation range within the first power generation range, and the power generation power of the range extender is relatively large.

[0074] S43: When it is detected that the power difference is less than or equal to the preset power difference, the range extender is controlled to generate power by using the power generation power and the rotation speed of the first target power generation operating point within the second power generation range.

[0075] If the power difference is less than or equal to the preset power difference, it means that the range extender needs to generate less power. At this time, the range extender is controlled to generate power by the power of the first target power point within the second power range and the speed, so that the power generation of the range extender is small, which can further improve the NVH performance of the vehicle while meeting the current preset NVH standard.

[0076] Figure 5 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 5 In some specific embodiments, the step of controlling the range extender to generate electricity based on the power generation and speed corresponding to the second target power generation operating point includes:

[0077] S51: When it is detected that the current vehicle speed is greater than the median vehicle speed of the current vehicle speed range, the range extender is controlled to generate electricity by using the power generation power and the rotation speed of a second target power generation operating point within a third power generation range.

[0078] When the vehicle is in a driving condition, after the second target power generation operating point is determined based on the current vehicle speed and the current ambient temperature, this embodiment further defines the steps of controlling the range extender to generate power based on the power generation power and speed corresponding to the second target power generation operating point.

[0079] It is detected that the current vehicle speed is greater than the median speed of the current vehicle speed range, indicating that the current vehicle speed is relatively large within the current vehicle speed range. Among them, the current vehicle speed range is the preset vehicle speed range in which the current vehicle speed is located. At this time, a larger power generation power is required to meet the current driving needs of the vehicle as much as possible. Therefore, the power generation power of the range extender is controlled by the power generation power and the speed of the second target power generation operating point within the third power generation range. Among them, the power generation power range corresponding to the second target power generation operating point is divided into at least a third power generation range and a fourth power generation range, and the average power generation power of the third power generation range is greater than the average power generation power of the fourth power generation range. Therefore, the power generation power of the range extender is actually relatively large at this time to meet the driving needs of the vehicle as much as possible.

[0080] S52: When it is detected that the current vehicle speed is less than or equal to the median vehicle speed of the current vehicle speed range, the range extender is controlled to generate electricity by using the power generation power and the rotation speed of the second target power generation operating point within the fourth power generation range.

[0081] It is detected that the current vehicle speed is less than or equal to the median speed of the current vehicle speed range, indicating that the current vehicle speed is a relatively small vehicle speed within the current vehicle speed range. At this time, the range extender is controlled to generate electricity by controlling the power generation power and speed of the second target power generation operating point within the fourth power generation power range, so that the range extender can operate at a smaller power generation power, and the NVH performance of the vehicle can be further improved under the premise of meeting the current preset NVH standard.

[0082] Figure 6 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 6 In some specific embodiments, before the step of detecting that the vehicle needs to generate electricity through the range extender in the remaining mileage, the method includes:

[0083] S61: Obtain the predicted vehicle speed and predicted ambient temperature corresponding to each sub-section of the remaining mileage of the vehicle; wherein the remaining mileage is composed of multiple sub-sections.

[0084] Specifically, the relevant information of the remaining mileage of the vehicle can be obtained according to the navigation information of the vehicle, that is, the predicted vehicle speed and predicted ambient temperature of each sub-section of the remaining mileage can be obtained.

[0085] S62: Determine the predicted power consumption corresponding to the sub-section based on the predicted vehicle speed and the predicted ambient temperature, and take the sum of the predicted power consumption corresponding to all sub-sections as the predicted total power consumption for the remaining mileage; wherein different combinations of vehicle speed ranges and ambient temperature ranges correspond to different predicted power consumptions.

[0086] Specifically, a preset relationship between the vehicle speed range, the ambient temperature range, and the predicted power consumption can be pre-established. For example, historical driving data of the vehicle in a historical period can be obtained, and then a preset relationship between the vehicle speed range, the ambient temperature range, and the predicted power consumption can be established based on the historical driving data. In this way, the obtained preset relationship is more in line with the user's historical driving habits, thereby making the predicted power consumption of the determined sub-section more accurate.

[0087] After obtaining the predicted power consumption of each sub-section, the sum of the predicted power consumption corresponding to all sub-sections can be used as the predicted total power consumption of the remaining mileage.

[0088] The following table is a relationship table between vehicle speed range, ambient temperature and predicted power consumption:

[0089]

[0090]

[0091] Among them, the table only uses one endpoint value of the ambient temperature range to represent the ambient temperature range. At this time, the power consumption can be obtained by looking up the table. For example, when the predicted vehicle speed is within the vehicle speed range of 40-80km / h, and the predicted ambient temperature is within the ambient temperature range corresponding to the ambient temperature -10°, the power consumption corresponding to the sub-section is b2.

[0092] S63: Determine whether the vehicle needs to generate electricity through the range extender during the remaining mileage based on the predicted total power consumption.

[0093] Specifically, the total power generation of the range extender is output according to the predicted total power consumption, the starting pure electric power and the range extender startup power. The total power generation = predicted total power consumption - (starting pure electric power - range extender startup power) + K.

[0094] The range extender startup power here is not the preset startup power described in this patent, but the startup power of the range extender in the prior art, which is generally lower than the preset startup power, such as 20%, 30%, etc. K is a calibration value, which changes with the ambient temperature and altitude, and the lower the ambient temperature, the larger the K value, and the higher the altitude, the larger the K value, ensuring that the total power generation can meet the user's arrival at the destination.

[0095] Among them, when it is determined through the above calculation method that the total power generation is greater than 0, it means that the range extender needs to generate electricity for the remaining mileage.

[0096] Figure 7 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 7 In some specific embodiments, the step of controlling the range extender to generate electricity based on the power generation and speed corresponding to the second target power generation operating point includes:

[0097] S71: When it is detected that the remaining power of the battery pack of the vehicle is greater than a preset minimum power, the range extender is controlled to generate power based on the power generation power and speed corresponding to the second target power generation operating point; wherein the preset minimum power is lower than the preset starting power.

[0098] It should be understood that step S71 and step S72 described in this embodiment do not limit the execution order of the steps.

[0099] When the vehicle is in a driving condition, the remaining power of the battery pack needs to be greater than the preset minimum power so that the range extender can operate based on the second target power generation operating point.

[0100] Among them, the preset minimum power can be set according to the specific situation, and the setting of the preset minimum power is linked to the power conservation performance of the vehicle. When the remaining power of the battery pack is lower than the preset minimum power, the power conservation performance of the vehicle is not good, so it is necessary to make the remaining power of the battery pack higher than the preset minimum power as much as possible. In some application scenarios, the preset minimum power can be the starting power of the range extender set in the prior art, such as 20%, 30%, etc., but there is no specific limitation.

[0101] Taking the preset minimum power of 20% as an example, when the remaining power of the battery pack is higher than 20%, it means that the battery pack still has a lot of power. Even if it works at the second target power generation operating point with lower power generation power, the power of the battery pack will not drop below 20% quickly, resulting in poor power retention performance of the vehicle. Therefore, the range extender can work based on the second target power generation operating point.

[0102] S72: When it is detected that the remaining power of the battery pack is less than or equal to the preset minimum power, the preset power generation operating point of the range extender is determined according to the current vehicle speed, and the range extender is controlled to operate and generate power based on the power generation power corresponding to the preset power generation operating point and the speed; wherein there is a preset relationship between the preset power generation operating point and the vehicle speed, and the power generation power of the preset power generation operating point is greater than the power generation power of the second target power generation operating point at the same vehicle speed.

[0103] If the remaining power of the battery pack is detected to be less than or equal to the preset minimum power, it means that the power of the battery pack is already very low. If it continues to operate at the second target power generation operating point with a lower power, the power of the battery pack will be further reduced, resulting in poor power conservation performance of the vehicle. Therefore, in this case, in order to improve the power conservation performance of the vehicle, the range extender will not be controlled based on the second target power generation operating point, but will be controlled based on the preset power generation operating point determined by the current vehicle speed.

[0104] Among them, the relationship between the preset power generation operating point and the vehicle speed is preset. When the range extender works at the preset power generation operating point, its power generation is greater than the power generation corresponding to the second target power generation operating point, and can meet the actual driving demand of the vehicle at the current speed, or even greater than the actual driving demand, so that more power is generated to charge the battery pack. In some application scenarios, the preset relationship between the preset power generation point and the vehicle speed can be the relationship between the power generation of the range extender and the vehicle speed in the prior art.

[0105] A second aspect of the present application provides a control device 20 for a vehicle range extender, Figure 8 It is a structural block diagram of an embodiment of the control device 20 of the vehicle range extender provided in the present application.

[0106] Combination Figure 8, the control device 20 of the vehicle range extender includes an acquisition module 21 and a control module 22. The acquisition module 21 is used to obtain the power generation working points corresponding to the range extender under different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establish a corresponding relationship; wherein the power generation working point includes power generation power and speed. The control module 22 is used to detect that the vehicle needs to generate power through the range extender in the remaining mileage, and the remaining power of the vehicle's battery pack is less than the preset starting power, then determine the current preset NVH standard and current ambient temperature of the vehicle; wherein the preset starting power is greater than the preset power value; according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, determine the corresponding target power generation working point, and control the range extender to generate power based on the power generation power and speed corresponding to the target power generation working point. Regarding the specific execution method of the above steps, please refer to the relevant content of the above embodiment without specific limitation.

[0107] A third aspect of the present application provides an electronic device, comprising: a processor; and a memory for storing a computer program, which, when executed by the processor, implements the control method of the vehicle range extender in any of the above embodiments.

[0108] Fig. 9 It is a schematic diagram of the structural framework of an embodiment of the electronic device 500 provided in the present application.

[0109] In some specific embodiments, the electronic device 500 includes a central processing unit (CPU) 501 and a read-only memory (ROM) 502, wherein the central processing unit 501 is a processor and the read-only memory (ROM) 502 is a memory. The central processing unit 501 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. 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 the bus 504. The input / output (I / O) interface 505 is also connected to the bus 504.

[0110] 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.

[0111] 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.

[0112] A fourth aspect of the present application provides a computer-readable storage medium 40, Fig.10 It is a schematic diagram of the structural framework of an embodiment of the computer-readable storage medium 40 provided in the present application.

[0113] The computer readable storage medium 40 stores a computer program 41 , and when the computer program 41 is executed by the processor, the control method of the vehicle range extender in any of the above embodiments is implemented.

[0114] It should be noted that the computer-readable medium 40 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 (Erasable Programmable Read On ly Memory, EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or 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. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The computer program contained on the 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.

[0115] In summary, the control method, device, electronic device and storage medium of the vehicle range extender provided by the present application include: obtaining the power generation working points corresponding to the range extender under different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establishing a corresponding relationship; wherein the power generation working point includes power generation power and speed; when it is detected that the vehicle needs to generate power through the range extender in the remaining mileage, and the remaining power of the vehicle's battery pack is less than the preset starting power, the current preset NVH standard and the current ambient temperature of the vehicle are determined; wherein the preset starting power is greater than the preset power value; according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, the corresponding target power generation working point is determined, and the power generation power and speed corresponding to the target power generation working point are controlled to generate power by the range extender. Therefore, when the vehicle is lower than a higher preset starting power, the range extender will work at the target power generation point corresponding to the current NVH standard, so that the NVH performance of the vehicle is better and can basically meet the power generation required by the vehicle for the remaining mileage.

[0116] 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: include: When the vehicle meets different preset NVH standards, the power generation operating points corresponding to the range extender under different preset ambient temperature ranges are obtained and a corresponding relationship is established; wherein the power generation operating point includes power generation power and rotation speed; When it is detected that the vehicle needs to generate electricity through the range extender in the remaining mileage, and the remaining power of the battery pack of the vehicle is less than the preset starting power, the current preset NVH standard and the current ambient temperature of the vehicle are determined; wherein the preset starting power is greater than the preset power value; A corresponding target power generation operating point is determined according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, and the range extender is controlled to generate power based on the power generation power and speed corresponding to the target power generation operating point.

2. The control method of a vehicle range extender according to claim 1, characterized in that: The step of obtaining the power generation operating points corresponding to the range extender under different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establishing a corresponding relationship comprises: Acquire first power generation operating points corresponding to the range extender in different preset ambient temperature ranges when the vehicle meets different preset NVH standards in an idle condition, and establish a first corresponding relationship between the preset NVH standard, the preset ambient temperature range, and the first power generation operating point; When the vehicle meets different preset NVH standards under driving conditions, the second power generation operating points corresponding to the range extender under different combinations of preset ambient temperature ranges and preset vehicle speed ranges are obtained, and a second corresponding relationship between the preset NVH standard, the preset ambient temperature range, the preset vehicle speed range and the second power generation operating point is established.

3. The control method of the vehicle range extender according to claim 2, characterized in that: The step of determining a corresponding target power generation operating point according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, and controlling the range extender to generate power based on the power generation power and speed corresponding to the target power generation operating point includes: When it is detected that the vehicle is in an idle condition, a first target power generation operating point is determined according to the current preset NVH standard, the current ambient temperature and the first corresponding relationship, and the range extender is controlled to generate power based on the power generation power and speed corresponding to the first target power generation operating point; When it is detected that the vehicle is in a driving condition, the current speed of the vehicle is obtained, and the corresponding second target power generation operating point is determined according to the current preset NVH standard, the current ambient temperature, the current vehicle speed and the second corresponding relationship, and the range extender is controlled to generate electricity based on the power generation power and speed corresponding to the second target power generation operating point.

4. The control method of the vehicle range extender according to claim 3, characterized in that: The step of controlling the range extender to generate electricity based on the generated power and the rotation speed corresponding to the first target power generation operating point includes: Obtaining a power difference between a current remaining power of a battery pack of the vehicle and a target remaining power; wherein the target remaining power is preset; When it is detected that the power difference is greater than a preset power difference, the range extender is controlled to generate power by using the power generation power and the rotation speed of the first target power generation operating point within the first power generation range; When it is detected that the power difference is less than or equal to the preset power difference, the range extender is controlled to generate power by using the power generation power and the rotation speed of the first target power generation working point within the second power generation range; Among them, the range of power generation corresponding to the first target power generation operating point is divided into at least a first power generation range and a second power generation range, and the average power generation power in the first power generation range is greater than the average power generation power in the second power generation range.

5. The control method of a vehicle range extender according to claim 3, characterized in that: The step of controlling the range extender to generate electricity based on the generated power and the rotation speed corresponding to the second target power generation operating point includes: When it is detected that the current vehicle speed is greater than the median vehicle speed of the current vehicle speed range, the range extender is controlled to generate electricity by using the power generation power and the rotation speed of the second target power generation operating point within the third power generation range; When it is detected that the current vehicle speed is less than or equal to the median vehicle speed of the current vehicle speed range, the range extender is controlled to generate electricity by using the power generation power and the rotation speed of the second target power generation operating point within a fourth power generation range; Among them, the range of power generation corresponding to the second target power generation operating point is divided into at least a third power generation range and a fourth power generation range, and the average power generation power of the third power generation range is greater than the average power generation power of the fourth power generation range.

6. The control method of a vehicle range extender according to claim 1, characterized in that: Before the step of detecting that the vehicle needs to generate electricity through the range extender in the remaining mileage, the method includes: Obtaining the predicted vehicle speed and predicted ambient temperature corresponding to each sub-section of the vehicle's remaining mileage; wherein the remaining mileage is composed of multiple sub-sections; Determine the predicted power consumption corresponding to the sub-section based on the predicted vehicle speed and the predicted ambient temperature, and take the sum of the predicted power consumption corresponding to all the sub-sections as the predicted total power consumption of the remaining mileage; wherein different combinations of vehicle speed ranges and ambient temperature ranges correspond to different predicted power consumptions; It is determined according to the predicted total power consumption whether the vehicle needs to generate electricity through the range extender during the remaining mileage.

7. The control method of a vehicle range extender according to claim 3, characterized in that: The step of controlling the range extender to generate electricity based on the generated power and the rotation speed corresponding to the second target power generation operating point includes: When it is detected that the remaining power of the battery pack of the vehicle is greater than a preset minimum power, the range extender is controlled to generate power based on the power generation power and speed corresponding to the second target power generation operating point; wherein the preset minimum power is lower than the preset starting power; When it is detected that the remaining power of the battery pack is less than or equal to the preset minimum power, the preset power generation operating point of the range extender is determined according to the current vehicle speed, and the range extender is controlled to operate and generate power based on the power generation power and the speed corresponding to the preset power generation operating point; wherein there is a preset relationship between the preset power generation operating point and the vehicle speed, and the power generation power of the preset power generation operating point is greater than the power generation power of the second target power generation operating point at the same vehicle speed.

8. A control device for a vehicle range extender, characterized in that: include: An acquisition module, used for acquiring the power generation working points corresponding to the range extender under different preset ambient temperature ranges when the vehicle meets different preset NVH standards and establishing a corresponding relationship; wherein the power generation working point includes power generation power and rotation speed; A control module is used to detect that the vehicle needs to generate electricity through the range extender in the remaining mileage, and the remaining power of the battery pack of the vehicle is less than the preset starting power, and then determine the current preset NVH standard and current ambient temperature of the vehicle; wherein the preset starting power is greater than the preset power value; determine the corresponding target power generation operating point according to the current preset NVH standard, the current ambient temperature and the corresponding relationship, and control the range extender to generate electricity based on the power generation power and speed corresponding to the target power generation operating point.

9. An electronic device, characterized in that: include: processor; A memory for storing a computer program, wherein when the computer program is executed by the processor, the control method of the vehicle range extender according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the control method of the vehicle range extender according to any one of claims 1 to 7 is implemented.

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