Control Method, Device, Electronic Device and Computer Readable Storage Medium of Vehicle Range Extender

Abstract

The present application relates to the technical field of vehicle range extender power generation, and discloses a control method, device, electronic device and computer-readable storage medium for a vehicle range extender, including: when it is detected that the range extender of the vehicle works during vehicle driving, obtaining the initial power of the battery pack when the range extender of the vehicle starts to work; obtaining the current power of the battery pack during the working process of the range extender, and determining the difference power between the current power and the initial power; controlling the range extender to work at a preset power generation power according to the difference power, so as to reduce the difference power in the subsequent working process; wherein, there is a preset relationship between the difference power and the preset power generation power. Therefore, during the working process of the range extender, it is possible to control the power generation work of the range extender according to the power difference between the initial power and the current power of the battery pack, and reduce the power difference in the subsequent working process of the range extender, preventing the power of the battery pack from being too high or too low, so as to optimize the power retention performance or fuel consumption performance of the vehicle.

Description

Technical Field

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

[0002] In a range - extended new - energy vehicle, if the power of the battery pack is lower than a preset threshold power during driving, the range extender will work to generate electricity to supply power to the drive motor, so as to ensure that the power of the battery pack is maintained near the threshold power.

[0003] Currently, in some climbing conditions, headwind conditions, and intense - driving conditions, the actual driving power of the vehicle is larger than the calculated driving power. In some downhill conditions, tailwind conditions, etc., the actual driving power of the vehicle is smaller than the calculated driving power. The range extender generally generates electricity according to the calculated driving power. At this time, it may cause the power generation power of the range extender to be too small or too large, resulting in the real - time power of the battery pack being too low or too high relative to the threshold power, and further resulting in poor power - maintaining performance or fuel - consumption performance of the vehicle. Summary of the Invention

[0004] In view of the above problems, the present application provides a control method, device, electronic device and computer - readable storage medium for a vehicle range extender, which can control the power - generation work of the range extender according to the power difference between the initial power and the current power of the battery pack, and can reduce this power difference during the subsequent work of the range extender, preventing the power of the battery pack from being too high or too low, so as to optimize the power - maintaining performance or fuel - consumption performance of the vehicle.

[0005] The first aspect of the present application provides a control method for a vehicle range extender, including: when it is detected that the range extender of the vehicle works during vehicle driving, obtaining the initial power of the battery pack when the range extender of the vehicle starts to work; obtaining the current power of the battery pack during the working process of the range extender, and determining the difference power between the current power and the initial power; wherein, the difference power is a positive value; controlling the range extender to work at a preset power - generation power according to the difference power, so as to reduce the difference power during the subsequent work process; wherein, there is a preset relationship between the difference power and the preset power - generation power.

[0006] In some specific embodiments, the step of controlling the range extender to work at a preset power - generation power according to the difference power, so as to reduce the difference power during the subsequent work process, includes: determining the basic power - generation power corresponding to the current vehicle speed, and determining the power correction amount corresponding to the difference power; wherein, there is a preset relationship between the power correction amount and the difference power, the power correction amount is a positive value and increases with the increase of the difference power; correcting the basic power - generation power based on the power correction amount to obtain the preset power - generation power, and controlling the range extender to work at the preset power - generation power.

[0007] In some specific embodiments, the step of determining the power correction amount corresponding to the difference in power consumption includes: determining the power correction coefficient corresponding to the difference in power consumption; wherein, there is a preset relationship between the power correction coefficient and the difference in power consumption, the power correction coefficient is a positive value and increases as the difference in power consumption increases; taking the product of the basic power generation power and the power correction coefficient as the power correction amount corresponding to the difference in power consumption.

[0008] In some specific embodiments, the step of correcting the basic power generation power based on the power correction amount to obtain the preset power generation power includes: when it is detected that the current power is greater than the initial power, subtracting the power correction amount from the basic power generation power to obtain the preset power generation power; when it is detected that the current power is less than the initial power, adding the power correction amount to the basic power generation power to obtain the preset power generation power.

[0009] In some specific embodiments, the step of, when it is detected that the current power is greater than the initial power, subtracting the power correction amount from the basic power generation power to obtain the preset power generation power includes: when it is detected that the current power is greater than the initial power, obtaining the increase in driving power generated by the vehicle based on the slope at the current moment; when it is detected that the increase in driving power is zero, taking the difference power obtained by subtracting the power correction amount from the basic power generation power as the preset power generation power.

[0010] In some specific embodiments, after the step of, when it is detected that the current power is greater than the initial power, obtaining the increase in driving power generated by the vehicle based on the slope at the current moment, includes: when it is detected that the increase in driving power is less than the driving power correction amount, taking the difference power obtained by subtracting the increase in driving power from the power correction amount as the corrected power correction amount, and taking the difference power obtained by subtracting the corrected power correction amount from the basic power generation power as the preset power generation power; when it is detected that the increase in driving power is greater than or equal to the power correction amount, taking the basic power generation power as the preset power generation power.

[0011] In some specific embodiments, the step of, when it is detected that the current power is less than the initial power, adding the power correction amount to the basic power generation power to obtain the preset power generation power includes: when it is detected that the current power is less than the initial power, obtaining the maximum power generation power of the range extender corresponding to the vehicle under the NVH standard at the current moment; when it is detected that the initial preset power generation power obtained by adding the basic power generation power and the power correction amount is less than or equal to the maximum power generation power, taking the initial preset power generation power as the preset power generation power; when it is detected that the initial preset power generation power obtained by adding the basic power generation power and the power correction amount is greater than the maximum power generation power, taking the maximum power generation power as the preset power generation power.

[0012] The second aspect of the present application provides a control device for a vehicle range extender, including: an acquisition module, configured to, when it is detected that the range extender of the vehicle works during the vehicle driving, acquire the initial power of the battery pack when the range extender of the vehicle starts to work; acquire the current power of the battery pack during the operation of the range extender, and determine the difference power between the current power and the initial power; wherein the difference power is a positive value; a control module, configured to control the range extender to work at a preset power generation power according to the difference power, so as to reduce the difference power during subsequent operation; wherein there is a preset relationship between the difference power and the preset power generation power.

[0013] The third aspect of the present application provides an electronic device, including: a processor; a memory, configured to store a computer program, and when the computer program is executed by the processor, it implements the control method of the vehicle range extender according to any one of the claims.

[0014] The fourth aspect of the present application provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by the processor, it implements the control method of the vehicle range extender as described above.

[0015] The beneficial technical effects that the present application at least has: Based on the control method, device, electronic device and computer-readable storage medium of the vehicle range extender provided by the present application, the method includes: when it is detected that the range extender of the vehicle works during the vehicle driving, acquire the initial power of the battery pack when the range extender of the vehicle starts to work; acquire the current power of the battery pack during the operation of the range extender, and determine the difference power between the current power and the initial power; wherein the difference power is a positive value; control the range extender to work at a preset power generation power according to the difference power, so as to reduce the difference power during subsequent operation; wherein there is a preset relationship between the difference power and the preset power generation power. Therefore, during the operation of the range extender, it is possible to control the power generation operation of the range extender according to the power difference between the initial power and the current power of the battery pack, and it is possible to reduce the power difference during the subsequent operation of the range extender, preventing the power of the battery pack from being too high or too low, so as to optimize the power retention performance or fuel consumption performance of the vehicle.

[0016] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to be able to understand the technical means of the embodiments of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and understandable, the following specifically gives the specific implementation manners of the present application. Brief Description of the Drawings

[0017] The drawings are only used to illustrate the embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

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

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

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

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

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

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

[0024] Figure 7 It is a schematic flowchart of yet 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 the control device of the vehicle range extender provided by the present application;

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

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

[0028] Hereinafter, the exemplary embodiments of the present application will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0029] If the descriptions such as "first" and "second" are involved in the embodiments of this 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 specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. Additionally, the meaning of "and / or" appearing throughout the text is that it includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. Moreover, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions results in contradictions 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] In the first aspect of this application, a control method for a vehicle range extender is provided, and this method is applied to a range-extended new energy vehicle. Figure 1 It is a schematic flowchart of an embodiment of the control method for a vehicle range extender provided by this application. Combining Figure 1 , this method includes the following steps:

[0031] S11: When it is detected that the range extender of the vehicle works during the vehicle driving process, obtain the initial power of the battery pack when the range extender of the vehicle starts to work.

[0032] During the vehicle driving process, if the power of the vehicle battery pack is less than the preset threshold power, then the range extender will work to generate electricity to supply power to the drive motor. Among them, the threshold power is preset, and the size of the threshold power can be set according to specific application scenarios. Factors such as different vehicle models and different vehicle driving modes of the same vehicle model may all affect the size of the threshold power.

[0033] Obtain the initial power of the battery pack when the range extender of the vehicle starts to work, that is, obtain the power of the battery pack at the moment when the vehicle range extender starts to work and use it as the initial power. In most application scenarios, the initial power is close to the above-mentioned threshold power. Of course, the initial power can also be quite different from the above-mentioned threshold power, without specific limitation.

[0034] S12: Obtain the current power of the battery pack during the working process of the range extender, and determine the difference power between the current power and the initial power; among them, the difference power is a positive value.

[0035] During the operation of the range extender, the power of the battery pack can be detected in real time and used as the current power of the battery pack. Among them, the detection of the initial power of the battery pack can be achieved according to a preset detection frequency. For example, the power of the battery pack is detected every preset time period, and the detected power is used as the current power of the battery pack. Among them, the length of the preset time period can be set according to the actual situation, but generally a relatively short time period is set.

[0036] It should be understood that during the operation of the range extender, the power generation power of the range extender is generally different from the actual driving power of the vehicle, which will result in the inconsistency between the power generated by the range extender and the actual power required for vehicle driving. At this time, if the range extender generates more power, the extra power generated will be introduced into the battery pack, increasing the power of the battery pack. If the range extender generates less power, the battery pack will supply part of the power to the drive motor, reducing the power of the battery pack.

[0037] Therefore, the detected current power is generally different from the initial power, and at this time, there will be a positive difference power between the current power and the initial power.

[0038] S13: Control the range extender to operate at a preset power generation power according to the difference power, so as to reduce the difference power in the subsequent operation process; among them, there is a preset relationship between the difference power and the preset power generation power.

[0039] It should be understood that during the operation of the range extender, it is only necessary to maintain the current power of the battery pack near the initial power. If the current power is higher than the initial power, it means that the range extender generates more power, resulting in more fuel consumption of the range extender and poor fuel consumption performance of the vehicle. If the current power is lower than the initial power, it means that the range extender generates less power. At this time, the battery pack will work in a bad state and the power retention performance of the vehicle is poor.

[0040] The larger the difference power is, the greater the gap between the current power and the initial power of the range extender is, indicating that the power of the battery pack is higher or lower than the initial power. And the higher the current power is compared with the initial power, the worse the fuel consumption performance of the vehicle is. The lower the current power is compared with the initial power, the worse the power retention performance of the vehicle is.

[0041] In this step, the range extender is controlled to operate at a preset power generation power according to the difference power, so as to reduce the difference power in the subsequent operation process. By reducing the difference power in the subsequent operation process of the range extender, the current power of the battery pack will not be too high or too low, thereby optimizing the power retention performance or fuel consumption performance of the vehicle.

[0042] It should be understood that the preset relationship between the difference in electric quantity and the preset power generation power can be obtained in advance according to test data, actual requirements, etc. In this preset relationship, in addition to the two parameters of the difference in electric quantity and the preset power generation power, it may also include fixed parameters of the vehicle itself and variable parameters during the vehicle driving process, and specific limitations are not made here. After obtaining the difference in electric quantity, the preset power generation power can be obtained according to the difference in electric quantity and the preset relationship, and then the range extender can be controlled to work at the preset power generation power.

[0043] Figure 2 is a schematic flowchart of another embodiment of the control method of the vehicle range extender provided by the present application. Combining Figure 2 , in some specific embodiments, the step of controlling the range extender to work at the preset power generation power according to the difference in electric quantity to reduce the difference in electric quantity in the subsequent working process, that is, the above step S13, includes:

[0044] S21: Determine the basic power generation power corresponding to the vehicle at the current vehicle speed, and determine the power correction amount corresponding to the difference in electric quantity; wherein, there is a preset relationship between the power correction amount and the difference in electric quantity, and the power correction amount is a positive value and increases with the increase of the difference in electric quantity.

[0045] It should be understood that the basic power generation power may be the same as the driving power of the vehicle at the current vehicle speed, and the method of determining the driving power of the vehicle at the current vehicle speed may be the method adopted in the prior art. Since the vehicle driving power is mainly related to the vehicle speed, the basic power generation power mainly depends on the current vehicle speed of the vehicle, and the higher the current vehicle speed, the generally higher the basic power generation power. Since the driving power determined in the prior art may not be consistent with the actual driving power of the vehicle, the basic power generation power may not be consistent with the actual driving power of the vehicle.

[0046] Similarly, the relationship between the difference in electric quantity and the power correction amount, in addition to the two elements of the difference in electric quantity and the power correction amount, may also have fixed parameters of the vehicle itself and variable parameters (such as vehicle speed) during the actual driving process of the vehicle, and specific limitations are not made here. And, the relationship between the power correction amount and the difference in electric quantity is generally that, under the condition that other parameters remain unchanged, for example, under the condition that the vehicle's own parameters, variable parameters, etc. remain unchanged, the larger the difference in electric quantity, the larger the power correction amount.

[0047] After obtaining the difference in electric quantity, according to the preset relationship and related parameters, the power correction amount corresponding to the difference in electric quantity can be obtained.

[0048] S22: Correct the basic power generation power based on the power correction amount to obtain the preset power generation power, and control the range extender to work at the preset power generation power.

[0049] It should be understood that the larger the difference in power consumption, the greater the degree of correction to the driving power should be in the subsequent process to effectively reduce the power consumption difference. Therefore, the power correction amount determined in the above steps increases with the increase in the difference in power consumption.

[0050] In this step, it is proposed to correct the basic power generation power based on the power correction amount to obtain the preset power generation power. Among them, the correction direction of correcting the basic power generation power based on the power correction amount is that when the range extender works at the preset power generation power, compared with working at the basic power generation power, the power consumption difference will decrease.

[0051] At this time, the larger the power correction amount, the higher the degree of correction to the basic power generation power, and thus the more effectively the power consumption difference is reduced.

[0052] Figure 3 It is a schematic flowchart of another embodiment of the control method for the vehicle range extender provided by this application. Combining Figure 3 , in some specific embodiments, the step of determining the power correction amount corresponding to the difference in power consumption includes:

[0053] S31: Determine the power correction coefficient corresponding to the difference in power consumption; among them, there is a preset relationship between the power correction coefficient and the difference in power consumption, the power correction coefficient is a positive value and increases with the increase in the difference in power consumption.

[0054] Specifically, the difference in power consumption can be expressed in the form of a percentage. For example, if the initial power is 20% of the power and the current power is 15% of the power, then the difference in power consumption can be 5% of the power. At this time, different differences in power consumption can respectively correspond to different power correction coefficients, or different ranges of differences in power consumption can respectively correspond to different power correction coefficients, which are not specifically limited here. For example, 5% of the power can correspond to a power correction coefficient, 6% of the power can correspond to a different power correction coefficient, or the power from 5% to 7% can correspond to the same power correction coefficient. Among them, the power correction coefficient is generally less than 1, but in some application scenarios, it can also be greater than 1, which is not specifically limited here.

[0055] After obtaining the difference in power consumption, the power correction coefficient corresponding to the difference in power consumption can be obtained according to this preset relationship.

[0056] S32: Take the product of the basic power generation power and the power correction coefficient as the power correction amount corresponding to the difference in power consumption.

[0057] It should be understood that the basic power generation power here is the basic power generation power corresponding to the current moment, and this basic power generation power is mainly related to the current vehicle speed. When the power correction coefficient is determined, the larger the basic power generation power, the larger the obtained power correction amount.

[0058] Combining the above content, since the power correction coefficient is generally less than 1, the product of the basic power generation and the power correction coefficient is generally less than the basic power generation.

[0059] Figure 4 It is a schematic flowchart of another embodiment of the control method for the vehicle range extender provided by the present application. Combining Figure 4 , in some specific embodiments, the step of correcting the basic power generation based on the power correction amount to obtain the preset power generation includes:

[0060] S41: If it is detected that the current power is greater than the initial power, subtract the power correction amount from the basic power generation to obtain the preset power generation.

[0061] Detecting that the current power is greater than the initial power indicates that the range extender generates more power, and at this time, the fuel consumption performance of the vehicle is not good. To improve the fuel consumption performance of the vehicle, the range extender should generate less power in the subsequent working process. Therefore, in the subsequent working process, it is preferably that the range extender operates at a power less than the basic power generation, so the power correction amount can be subtracted from the basic power generation to obtain the preset power generation.

[0062] It should be understood that in some application scenarios, the preset power generation can be directly obtained by subtracting the power correction amount from the basic power generation. However, in other application scenarios, further operations, judgments, and other logics can be performed on the basis of subtracting the power correction amount from the basic power generation, and then the preset power generation is finally obtained. This embodiment does not make specific limitations.

[0063] S42: If it is detected that the current power is less than the initial power, add the power correction amount to the basic power generation to obtain the preset power generation.

[0064] Detecting that the current power is less than the initial power indicates that the range extender generates less power, and at this time, the power retention performance of the vehicle is not good. To improve the power retention performance of the vehicle, the range extender should generate more power in the subsequent working process. Therefore, in this step, the power correction amount is added to the basic power generation to obtain the preset power generation, so that the range extender operates at a power greater than the basic power generation, so that the power of the battery pack increases to reduce the difference in power.

[0065] It should be understood that adding the power correction amount to the basic power generation to obtain the preset power generation. In some application scenarios, the power value obtained by directly adding the power correction amount to the basic power generation can be used as the preset power generation, or the preset power generation can be obtained after further calculation and judgment. This embodiment does not make specific limitations.

[0066] Figure 5 It is a schematic flowchart of another embodiment of the control method for the vehicle range extender provided by the present application. Combining Figure 5, in some specific embodiments, when it is detected that the current power is greater than the initial power, the step of subtracting the power correction amount from the basic power generation power to obtain the preset power generation power includes:

[0067] S51: When it is detected that the current power is greater than the initial power, obtain the increase in driving power generated by the vehicle based on the slope at the current moment.

[0068] It should be understood that the slope of the road on which the vehicle travels has a great influence on the driving power of the vehicle. When calculating the driving power of the vehicle in the prior art, the influence of the slope on the driving power is generally not considered. Therefore, the calculated driving power may be larger or smaller than the actual driving power of the vehicle. At this time, the obtained basic power generation power will be larger or smaller than the actual driving power.

[0069] The increase in driving power generated by the slope at the current moment is the difference between the driving power in the case of no slope and the driving power in the actual slope determined based on the fixed parameters of the vehicle and the vehicle driving state parameters at the current moment. Among them, when the driving section is uphill, the increase in driving power is a positive value; when the driving section is downhill, the increase in driving power is a negative value; when the driving section is flat, the increase in driving power is 0.

[0070] S52: When it is detected that the increase in driving power is zero, use the difference power obtained by subtracting the power correction amount from the basic power generation power as the preset power generation power.

[0071] When it is detected that the increase in driving power is zero, it means that the vehicle is driving on a flat road at this time, and the driving power of the vehicle is not affected by the slope. At this time, use the difference power obtained by subtracting the power correction amount from the basic power generation power as the preset power generation power to minimize the actual working power of the vehicle, and then reduce the difference power well.

[0072] Figure 6 is a schematic flowchart of another embodiment of the control method of the vehicle range extender provided by the present application. Combining Figure 6 , in some specific embodiments, after the step of obtaining the increase in driving power generated by the vehicle based on the slope at the current moment when it is detected that the current power is greater than the initial power, that is, after the above step S51, it includes:

[0073] S61: When it is detected that the increase in driving power is less than the driving power correction amount and is not zero, use the difference power obtained by subtracting the increase in driving power from the driving power correction amount as the corrected driving power correction amount, and use the difference power obtained by subtracting the corrected driving power correction amount from the basic power generation power as the preset power generation power.

[0074] When the increase in driving power is less than the driving power correction amount and is not zero, the increase in driving power may be a positive value or a negative value.

[0075] When the increase in driving power is positive, the difference power obtained by subtracting the power correction amount from the increase in driving power will be smaller than the power correction amount. It should be understood that when the increase in driving power is positive, it indicates that the vehicle is driving on an uphill section. At this time, the basic power generation power of the vehicle is actually lower than the actual driving power of the vehicle. At this time, if the vehicle travels at the basic power generation power, the power of the battery pack will decrease, and the difference power will decrease to a certain extent. Therefore, before correcting the basic power generation power through the power correction amount, the power correction amount can be further corrected, that is, the difference power obtained by subtracting the increase in driving power from the power correction amount is used as the corrected power correction amount. At this time, the corrected power correction amount is smaller than the power correction amount before correction. At this time, the basic power generation power is further corrected through the corrected power correction amount, and the difference power obtained by subtracting the corrected power correction amount from the basic power generation power is used as the preset power generation power. At this time, the degree of correction of the basic power generation power is small, which is in line with the actual application scenario on the uphill section. At this time, the decrease in the difference power is actually achieved through two factors: the power correction amount and the uphill road condition of the vehicle.

[0076] When the increase in driving power is negative, the difference power obtained by subtracting the power correction amount from the increase in driving power will be larger than the power correction amount. It should be understood that when the increase in driving power is negative, it indicates that the vehicle is driving on a downhill section. At this time, the basic power generation power of the vehicle is actually higher than the actual driving power of the vehicle. At this time, if the vehicle travels at the basic power generation power, the power of the battery pack will increase, and the difference power will increase to a certain extent. At this time, before correcting the basic power generation power through the power correction amount, the power correction amount can be further corrected, that is, the difference power obtained by subtracting the increase in driving power from the power correction amount is used as the corrected power correction amount. At this time, the corrected power correction amount is larger than the power correction amount before correction. At this time, the basic power generation power is further corrected through the corrected power correction amount, that is, the difference power obtained by subtracting the corrected power correction amount from the basic power generation power is used as the preset power generation power. At this time, the degree of correction of the basic power generation power is large, which is in line with the actual application scenario on the downhill section. At this time, in the method of reducing the difference power by the range extender at the preset power generation power, the influence factor that the downhill section will cause the battery power to increase and then lead to the increase of the difference power is considered.

[0077] S62: If it is detected that the increase in driving power is greater than or equal to the power correction amount, the basic power generation power is used as the preset power generation power.

[0078] When it is detected that the driving power correction amount is greater than or equal to the power correction amount, it indicates that the vehicle is driving on an uphill section with a relatively large slope. At this time, if the range extender operates at the basic power generation power, the basic power generation power is smaller than the actual driving power of the vehicle, and the difference between the two is the driving power increase amount. At this time, due to the slope factor, the power of the battery pack will decrease, and the degree of decrease in the power of the battery pack is greater than the degree of decrease corresponding to the power correction amount. At this time, there is no need to further correct the basic power generation power with the power correction amount, and directly controlling the range extender to operate at the basic power generation power can achieve a good power reduction effect.

[0079] Combining the above content, when the current power is greater than the initial power, the preset power generation power obtained by correcting the basic power generation power through the power correction amount is smaller than the basic power generation power. At this time, not only can the fuel consumption performance of the vehicle be improved, but also the NVH performance of the vehicle can be improved.

[0080] Figure 7 It is a schematic flowchart of another embodiment of the control method for the vehicle range extender provided by the present application. Combining Figure 7 , in some specific embodiments, when it is detected that the current power is less than the initial power, the step of adding the basic power generation power and the power correction amount to obtain the preset power generation power, that is, the above step S42, includes:

[0081] S71: When it is detected that the current power is less than the initial power, obtain the maximum power generation power of the range extender corresponding to the NVH standard of the vehicle at the current moment.

[0082] When it is detected that the current power is less than the initial power, it indicates that the power of the battery pack is too low at this time. In order to ensure the power retention performance of the vehicle, it is necessary to increase the power of the battery pack, that is, a larger preset power generation power is required in the subsequent process, and when the preset power generation power is larger, it will affect the NVH performance (Noise, Vibration, Harshness) of the vehicle.

[0083] This embodiment takes into account the NVH performance of the vehicle. When it is detected that the current power is less than the initial power, obtain the maximum power generation power of the range extender corresponding to the NVH standard of the vehicle at the current moment. The preset NVH standard is preset in advance, and there is a corresponding maximum power generation power under this preset NVH standard. When the power generation power of the range extender is greater than this maximum power generation power, the NVH performance of the vehicle is likely to not meet the preset NVH standard.

[0084] S72: When it is detected that the initial preset power generation power obtained by adding the basic power generation power and the power correction amount is less than or equal to the maximum power generation power, use the initial preset power generation power as the preset power generation power.

[0085] It is detected that the initial preset power generation obtained by adding the base power generation power and the power correction amount is less than or equal to the maximum power generation power, which means that when the range extender operates at the initial preset power generation power, the NVH performance of the vehicle can meet the preset NVH standard. At this time, the initial preset power generation power is taken as the preset power generation power, and then the range extender is controlled to operate at the preset power generation power in the subsequent process.

[0086] S73: If it is detected that the initial preset power generation obtained by adding the base power generation power and the power correction amount is greater than the maximum power generation power, then the maximum power generation power is taken as the preset power generation power.

[0087] It is detected that the initial preset power generation obtained by adding the base power generation power and the power correction amount is greater than the maximum power generation power, which means that when the range extender operates at the initial preset power generation power, the NVH performance of the vehicle is likely not to meet the preset NVH standard. At this time, in order to meet the preset NVH standard and ensure that the range extender operates at a relatively large power to increase the battery pack power, the maximum power generation power is taken as the preset power generation power, so as to control the range extender to operate at the preset power generation power of the maximum power generation power in the subsequent process.

[0088] The second aspect of the present application provides a control device 20 for a vehicle range extender, Figure 8 which is a structural block diagram of an embodiment of the control device 20 for a vehicle range extender provided by the present application.

[0089] Combined with Figure 8 , the control device 20 for a vehicle range extender includes an acquisition module 21 and a control module 22. The acquisition module 21 is configured to, when it is detected that the range extender of the vehicle operates during the vehicle driving, acquire the initial power of the battery pack when the range extender of the vehicle starts to operate; acquire the current power of the battery pack during the operation of the range extender, and determine the difference power between the current power and the initial power; wherein, the difference power is a positive value. The control module 22 is configured to control the range extender to operate at a preset power generation power according to the difference power, so as to reduce the difference power in the subsequent operation process; wherein, there is a preset relationship between the difference power and the preset power generation power.

[0090] The third aspect of the present application provides an electronic device, including: a processor; a memory for storing a computer program, and when the computer program is executed by the processor, it implements the control method for a vehicle range extender in any of the above embodiments.

[0091] Figure 9 which is a schematic structural framework diagram of an embodiment of the electronic device 500 provided by the present application.

[0092] In some specific embodiments, the electronic device 500 includes a Central Processing Unit (CPU) 501 and a Read-Only Memory (ROM) 502. The Central Processing Unit 501 is the processor, and the Read-Only Memory (ROM) 502 is the 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 section 508 into the Random Access Memory (RAM) 503, such as executing the method in the above embodiments. In the RAM 503, various programs and data required for system operation are also stored. The CPU 501, ROM 502, and RAM 503 are connected to each other via a bus 504. An Input / Output (I / O) interface 505 is also connected to the bus 504.

[0093] 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, for example, 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 Local Area Network (LAN) 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 from it can be installed into the storage section 508 as needed.

[0094] Specifically, according to the embodiments of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments of the present application include a computer program product that 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 the network through the communication section 509, and / or installed from the removable medium 511. When the computer program is executed by the Central Processing Unit (CPU) 501, various functions defined in the system of the present application are executed.

[0095] The third aspect of the present application provides a computer-readable storage medium 40, Figure 10 which is a schematic structural framework diagram of an embodiment of the computer-readable storage medium 40 provided by the present application.

[0096] A computer program 41 is stored on the computer-readable storage medium 40. When the computer program 41 is executed by a processor, it implements the control method of the vehicle range extender in any of the above embodiments.

[0097] It should be noted that the computer-readable medium 40 shown in the embodiments of the present application may be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. The computer-readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having 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, the computer-readable storage medium may be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device. In the present application, the computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable computer program. Such a propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium may also be any computer-readable medium other than the computer-readable storage medium, and this computer-readable medium can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted by any suitable medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0098] In summary, based on the control method, device, electronic device, and computer-readable storage medium of the vehicle range extender provided by this application, the method includes: when it is detected that the range extender of the vehicle works during the vehicle driving, obtaining the initial power of the battery pack when the range extender of the vehicle starts to work; obtaining the current power of the battery pack during the working process of the range extender, and determining the difference power between the current power and the initial power; wherein, the difference power is a positive value; controlling the range extender to work at a preset power generation power according to the difference power, so as to reduce the difference power in the subsequent working process; wherein, there is a preset relationship between the difference power and the preset power generation power. Therefore, during the working process of the range extender, it is possible to control the power generation work of the range extender according to the power difference between the initial power and the current power of the battery pack, and reduce this power difference in the subsequent working process of the range extender, preventing the power of the battery pack from being too high or too low, so as to optimize the power retention performance or fuel consumption performance of the vehicle.

[0099] The above content is only a preferred exemplary embodiment of this application and is not used to limit the implementation of this application. Those of ordinary skill in the art can easily make corresponding changes or modifications according to the main idea and spirit of this application. Therefore, the protection scope of this application should be subject to the protection scope required by the claims.

Claims

1. A control method for a vehicle range extender, characterized in that, Including: When it is detected that the range extender of the vehicle works during the vehicle driving, obtain the initial power of the battery pack when the range extender of the vehicle starts to work; Obtain the current power of the battery pack during the working process of the range extender, and determine the difference power between the current power and the initial power; wherein, the difference power is a positive value; Control the range extender to work at a preset power generation power according to the difference power, so as to reduce the difference power during the subsequent working process; wherein, there is a preset relationship between the difference power and the preset power generation power; The step of controlling the range extender to work at a preset power generation power according to the difference power to reduce the difference power during the subsequent working process includes: Determine the basic power generation power corresponding to the current vehicle speed, and determine the power correction amount corresponding to the difference power; wherein, there is a preset relationship between the power correction amount and the difference power, the power correction amount is a positive value and increases with the increase of the difference power; Correct the basic power generation power based on the power correction amount to obtain the preset power generation power, and control the range extender to work at the preset power generation power; The step of correcting the basic power generation power based on the power correction amount to obtain the preset power generation power includes: When it is detected that the current power is greater than the initial power, subtract the power correction amount from the basic power generation power to obtain the preset power generation power; When it is detected that the current power is less than the initial power, add the power correction amount to the basic power generation power to obtain the preset power generation power.

2. The control method of the vehicle range extender according to claim 1, wherein: The step of determining the power correction amount corresponding to the difference power includes: Determine the power correction coefficient corresponding to the difference power; wherein, there is a preset relationship between the power correction coefficient and the difference power, the power correction coefficient is a positive value and increases with the increase of the difference power; Take the product of the basic power generation power and the power correction coefficient as the power correction amount corresponding to the difference power.

3. The control method of the vehicle range extender according to claim 2, wherein: When it is detected that the current power is greater than the initial power, the step of subtracting the power correction amount from the basic power generation power to obtain the preset power generation power includes: When it is detected that the current power is greater than the initial power, obtain the driving power increase amount generated by the vehicle based on the slope at the current moment; When it is detected that the driving power increase amount is zero, take the difference power obtained by subtracting the power correction amount from the basic power generation power as the preset power generation power.

4. The control method of the vehicle range extender according to claim 3, wherein: After the step of obtaining the driving power increase amount generated by the vehicle based on the slope at the current moment when it is detected that the current power is greater than the initial power, include: If it is detected that the increased driving power is less than the driving power correction amount and is not zero, then the difference power obtained by subtracting the increased driving power from the power correction amount is used as the corrected power correction amount, and the difference power obtained by subtracting the corrected power correction amount from the basic power generation power is used as the preset power generation power; If it is detected that the increased driving power is greater than or equal to the power correction amount, then the basic power generation power is used as the preset power generation power.

5. The control method of the vehicle range extender according to claim 1, wherein: When it is detected that the current battery level is less than the initial battery level, the step of adding the basic power generation power and the power correction amount to obtain the preset power generation power includes: When it is detected that the current battery level is less than the initial battery level, obtain the maximum power generation power of the range extender under the NVH standard corresponding to the vehicle at the current moment; If it is detected that the initial preset power generation power obtained by adding the basic power generation power and the power correction amount is less than or equal to the maximum power generation power, use the initial preset power generation power as the preset power generation power; If it is detected that the initial preset power generation power obtained by adding the basic power generation power and the power correction amount is greater than the maximum power generation power, then use the maximum power generation power as the preset power generation power.

6. A control device for a vehicle range extender, characterized in that, including: An acquisition module, configured to, when it is detected that the range extender of the vehicle works during the vehicle driving process, acquire the initial battery level of the battery pack when the range extender of the vehicle starts to work; Acquire the current battery level of the battery pack during the working process of the range extender, and determine the difference in battery level between the current battery level and the initial battery level; wherein, the difference in battery level is a positive value; A control module, configured to determine the basic power generation power corresponding to the vehicle at the current vehicle speed, and determine the power correction amount corresponding to the difference in battery level; wherein, there is a preset relationship between the power correction amount and the difference in battery level, the power correction amount is a positive value and increases as the difference in battery level increases; correct the basic power generation power based on the power correction amount to obtain the preset power generation power, and control the range extender to work at the preset power generation power; wherein, correcting the basic power generation power based on the power correction amount to obtain the preset power generation power includes: when it is detected that the current battery level is greater than the initial battery level, subtract the power correction amount from the basic power generation power to obtain the preset power generation power; when it is detected that the current battery level is less than the initial battery level, add the basic power generation power and the power correction amount to obtain the preset power generation power.

7. An electronic device, characterized in that, including: A processor; A memory, configured to store 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 1-5 is implemented.

8. A computer-readable storage medium, characterized in that, A computer program is stored in the storage medium, and when the computer program is executed by a processor, the control method of the vehicle range extender according to any one of claims 1-5 is implemented.

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