Control method of extended-range electric vehicle, computer device and storage medium

Abstract

The invention discloses a control method of an extended-range electric vehicle, a computer device and a storage medium. The control method comprises the following steps: acquiring traffic condition information of each to-be-driven road section of the extended-range electric vehicle; determining the upper limit of the power generation parameter of the range extender for any road section to be driven according to the traffic condition information; and controlling the range extender of the range-extended electric vehicle according to the upper limit of the power generation parameter of each range extender. According to the method, the maximum value of the working parameters of the range extender capable of guaranteeing the driving comfort in each predicted driving sub-road section is determined according to the traffic condition information of each predicted driving sub-road section, and the specific working parameters of the range extender are limited according to the upper limit of the power generation parameters of the range extender; the range extender can be guaranteed not to generate too large noise or vibration, the driving comfort is guaranteed, power generation work can be carried out according to working parameters as large as possible in the predicted driving sub-road section, and the electric energy output requirement of the range extending type electric vehicle for the range extender is met. The invention is widely applied to the technical field of automobiles.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a control method, a computer device and a storage medium for an extended-range electric vehicle. Background Art

[0002] An extended-range electric vehicle is a vehicle equipped with a power battery and a range extender. An extended-range electric vehicle can use the power provided by the power battery as the driving force. When the power battery is insufficient, the range extender can provide the power as the driving force. The power provided by the range extender can also charge the power battery. Therefore, the extended-range electric vehicle has the advantages of pure electric vehicles such as environmental protection and high torque, and has the advantages of pure fuel vehicles such as long endurance.

[0003] The current extended-range electric vehicles, the control technology of the range extender and other components in them only meet the basic driving needs of the car. However, the range extender of the extended-range electric vehicle will generate noise and vibration when working, which will make the passengers feel uncomfortable, especially when the range extender is suddenly started, it will cause a sudden change in sound and vibration, which will make the passengers feel more obvious, thus easily reducing the driving experience. Summary of the invention

[0004] In view of the current technical problems such as the poor driving experience of extended-range electric vehicles, the purpose of the present invention is to provide a control method, a computer device and a storage medium for an extended-range electric vehicle.

[0005] In one aspect, an embodiment of the present invention includes a control method for an extended-range electric vehicle, the control method for an extended-range electric vehicle comprising the following steps:

[0006] Determining at least one road section to be traveled by the extended-range electric vehicle;

[0007] Obtaining the traffic condition information of each of the road sections to be traveled;

[0008] For any of the road sections to be traveled, determining an upper limit of the range extender power generation parameter according to the traffic condition information;

[0009] The range extender of the extended-range electric vehicle is controlled according to the upper limits of the power generation parameters of each range extender.

[0010] Furthermore, the obtaining of the traffic condition information of each of the road sections to be traveled includes:

[0011] For any of the road sections to be traveled, a plurality of sub-item information of traffic conditions of the road section to be traveled is obtained; each of the sub-item information of traffic conditions includes congestion degree information, slope information and weather information;

[0012] The traffic condition information of the road section to be traveled is composed of each of the traffic condition sub-item information.

[0013] Furthermore, for any of the road sections to be traveled, determining the upper limit of the range extender power generation parameter according to the traffic condition information includes:

[0014] For any of the road sections to be traveled, respectively determine the weight information corresponding to each of the traffic condition sub-item information;

[0015] Determine a weighted sum according to each of the traffic condition sub-item information and each of the weight information;

[0016] An upper limit of the power generation parameter of the range extender is determined according to the weighted sum.

[0017] Furthermore, the controlling of the range extender of the extended-range electric vehicle according to the upper limits of the power generation parameters of each range extender includes:

[0018] Obtaining the initial power of the extended-range electric vehicle;

[0019] For any of the sections to be traveled, the estimated power consumption and the estimated power generation of the section to be traveled are obtained; the estimated power generation is the power generation generated by the range extender of the extended-range electric vehicle according to the upper limit of the range extender power generation parameter at the section to be traveled;

[0020] When the sum of the initial power and all the expected power generation is greater than the sum of all the expected power consumption, a balance point is determined; the balance point is a point in all the sections to be traveled, and the sum of each of the expected power generation and the initial power of each section to be traveled before the balance point is equal to the sum of each of the expected power consumption of all the sections to be traveled;

[0021] Before the extended-range electric vehicle reaches the balance point, controlling the range extender of the extended-range electric vehicle to generate electricity according to the upper limit of the range extender power generation parameter corresponding to the position;

[0022] After the extended-range electric vehicle reaches the balance point, the range extender of the extended-range electric vehicle is controlled to suspend power generation.

[0023] Furthermore, the controlling of the range extender of the extended-range electric vehicle according to the upper limits of the power generation parameters of each range extender includes:

[0024] Obtaining the initial power of the extended-range electric vehicle;

[0025] For any of the sections to be traveled, the estimated power consumption and the estimated power generation of the section to be traveled are obtained; the estimated power generation is the power generation generated by the range extender of the extended-range electric vehicle according to the upper limit of the range extender power generation parameter at the section to be traveled;

[0026] When the sum of the initial power and all the expected power generation is greater than the sum of all the expected power consumption, a reduction ratio coefficient is determined; the reduction ratio coefficient is used to respectively reduce the upper limit of the power generation parameter of each range extender, so that the sum of the initial power and all the expected power generation after the reduction is equal to the sum of all the expected power consumption;

[0027] According to the reduction ratio coefficient, respectively lower the upper limit of the power generation parameter of each range extender;

[0028] The range extender of the extended-range electric vehicle is controlled to generate electricity according to the lowered upper limit of the power generation parameter of the range extender corresponding to the location.

[0029] Further, the determining of at least one road section to be traveled by the extended-range electric vehicle comprises:

[0030] Obtain the total estimated driving distance of the extended-range electric vehicle in the future period;

[0031] Determine the partition granularity;

[0032] Dividing the total estimated travel section according to the division granularity to obtain a plurality of estimated travel sub-sections;

[0033] Obtaining the traffic condition information of each of the estimated travel sub-segments;

[0034] Clustering the traffic condition information of each of the expected travel sub-segments;

[0035] Executing a first division step, combining a plurality of adjacent estimated travel sub-segments whose corresponding traffic condition information is clustered into the same category into one to-be-traveled segment;

[0036] The second division step is performed to individually determine the expected travel sub-sections that are not combined into the to-be-traveled section in the first division step as the to-be-traveled section.

[0037] Furthermore, the method of obtaining the total estimated driving distance of the extended-range electric vehicle in a future period of time includes:

[0038] Get the current location of the extended-range electric vehicle;

[0039] Determine the extended mileage;

[0040] Extending from the current location destination direction according to the extended mileage;

[0041] The extended road section is used as the estimated total travel section.

[0042] Furthermore, the determining of the extended mileage includes:

[0043] Obtaining the initial power of the extended-range electric vehicle;

[0044] The extended mileage is determined according to the initial power; the extended mileage is negatively correlated with the initial power.

[0045] On the other hand, an embodiment of the present invention also includes a computer device, including a memory and a processor, the memory is used to store at least one program, and the processor is used to load at least one program to execute the control method of the extended-range electric vehicle in the embodiment.

[0046] On the other hand, an embodiment of the present invention further includes a computer-readable storage medium storing a program executable by a processor, and the program executable by the processor is used to execute the control method of the extended-range electric vehicle in the embodiment when executed by the processor.

[0047] The beneficial effects of the present invention are as follows: the control method of the extended-range electric vehicle in the embodiment determines the maximum value of the range extender operating parameters that can ensure driving comfort in each expected driving sub-section according to the traffic condition information of each expected driving sub-section, and limits the specific operating parameters of the range extender according to the upper limit of the range extender power generation parameters, which can ensure that the range extender does not emit excessive noise or generate excessive vibration, ensure driving comfort, and can generate electricity according to the largest possible operating parameters in the expected driving sub-section, thereby meeting the extended-range electric vehicle's demand for the range extender's power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a schematic diagram of an extended-range electric vehicle to which the control method of the extended-range electric vehicle in the embodiment can be applied;

[0049] Figure 2 A schematic diagram of the steps of the control method of the extended-range electric vehicle in the embodiment;

[0050] Figure 3 and Figure 4 A schematic diagram of the principle of the step of determining at least one road section to be traveled by the extended-range electric vehicle in the embodiment;

[0051] Figure 5 This is a schematic diagram of the principle of the step of determining the upper limit of the range extender power generation parameter according to the traffic condition information in the embodiment;

[0052] Figure 6 This is a schematic diagram of the principle of determining the balance point in the embodiment;

[0053] Figure 7 It is a schematic diagram of the principle of determining the reduction proportional coefficient in the embodiment. DETAILED DESCRIPTION

[0054] In this embodiment, the control method of the extended-range electric vehicle can be applied to Figure 1 In the extended-range electric vehicle shown in FIG. Figure 1 The extended-range electric vehicle includes a control module, a navigation module, a power battery, a range extender and a motor. Among them, the control module is a component with data processing and control functions, such as an electronic control unit (ECU), etc. The control module also has the function of a battery management system (BMS), so as to manage the charging and discharging of the power battery; the navigation module has the functions of positioning and navigation; the power battery is used to store the power and electric energy required for driving the car, and can also store the electric energy required by the electric components such as air conditioners, lights and audio-visual entertainment systems installed on the car; the range extender includes an engine and a generator, wherein the engine can be a fuel or gas engine. When the range extender is working, the engine drives the generator to generate electricity, so that the range extender outputs electric energy. The electric energy output by the range extender can be directly provided to the motor to drive the car, or it can be delivered to the power battery for charging, or it can be provided to the motor to drive the car while being delivered to the power battery for charging; the motor can be powered by the power battery or the range extender, or by the power battery and the range extender at the same time, to convert the electric energy into mechanical energy.

[0055] In this embodiment, each step in the control method of the extended-range electric vehicle can be executed by the control module. Figure 2 , the control method of the extended-range electric vehicle comprises the following steps:

[0056] S1. Determine at least one road section to be traveled by the extended-range electric vehicle;

[0057] S2. Obtaining traffic information for each road section to be traveled;

[0058] S3. For any road section to be traveled, determine the upper limit of the range extender power generation parameter according to the traffic information;

[0059] S4. Controlling the range extender of the extended-range electric vehicle according to the upper limits of the power generation parameters of each range extender.

[0060] In step S1, the control module may call the navigation module to determine n sections of the extended-range electric vehicle, such as section 1, section 2, ... section n, which are sections that the extended-range electric vehicle is expected to reach in the future.

[0061] In this embodiment, when executing step S1, the control module can intercept a certain length (a fixed length or a length that can be traveled within a fixed time at the current speed) along the navigation route from the current position according to the navigation route planned by the navigation module and the current position of the extended-range electric vehicle obtained by positioning, and then use the intercepted route as a single section to be traveled, or decompose the intercepted route into multiple sections to be traveled. When decomposing, it can be divided equally or according to a fixed unit length (for example, 1 km).

[0062] In this embodiment, when executing step S1, that is, determining at least one road section to be traveled by the extended-range electric vehicle, the following steps may be specifically performed:

[0063] S101. Obtain the total estimated travel distance of the extended-range electric vehicle in the future;

[0064] S102. Determine the partition granularity;

[0065] S103. Divide the total estimated travel section according to the division granularity to obtain a plurality of estimated travel sub-sections;

[0066] S104. Obtaining the traffic information of each expected travel sub-segment;

[0067] S105. Clustering the traffic condition information of each expected travel sub-segment;

[0068] S106. Execute the first division step, grouping the corresponding traffic condition information into the same category and combining multiple adjacent expected travel sub-segments into one to-be-traveled segment;

[0069] S107. Execute the second division step to individually determine the expected travel sub-sections that are not combined into the to-be-traveled section in the first division step as the to-be-traveled section.

[0070] The principle of steps S101-S103 is as follows Figure 3 As shown, the principles of steps S104-S107 are as follows Figure 4 shown.

[0071] Reference Figure 3 In step S101, the control module calls the navigation module to obtain the total estimated driving section of the extended-range electric vehicle in the future. Specifically, the navigation module can establish a navigation task, input the departure point and destination of the extended-range electric vehicle, run the path planning algorithm, and plan the total estimated driving section from the departure point to the destination.

[0072] In this embodiment, the departure point and destination of the extended-range electric vehicle used in step S101 may be fixed, for example, using the departure point and destination of the extended-range electric vehicle for the entire journey; the departure point and destination of the extended-range electric vehicle used in step S101 may be dynamic, for example, dynamically updating its departure point and destination during the driving process of the extended-range electric vehicle.

[0073] In step S102, the control module determines the granularity of dividing the total estimated driving section. In this embodiment, the granularity of division refers to the size of m when the total estimated driving section is divided into m equal parts according to the distance. In this embodiment, a fixed value can be used as m, or the size of m can be set according to the initial power of the power battery in the extended-range electric vehicle (for example, the power of the power battery when the extended-range electric vehicle is at the starting end of the total estimated driving section, i.e., the departure point). Specifically, m is negatively correlated with the initial power, i.e., the smaller the initial power, the larger m.

[0074] In step S103, refer to Figure 3 , the total estimated travel section is divided according to the division granularity to obtain m estimated travel sub-sections, such as estimated travel sub-section 1, estimated travel sub-section 2, ..., estimated travel sub-section m. These estimated travel sub-sections are connected end to end in sequence to form the total estimated travel section.

[0075] In step S104, the control module obtains the traffic condition information of each expected driving sub-section. Specifically, the control module can call the sensor installed on the extended-range electric vehicle to detect the traffic condition information, or call the communication module installed on the extended-range electric vehicle to communicate with the adjacent vehicle or the Internet server to obtain the traffic condition information, or use the above methods at the same time to obtain the traffic condition information.

[0076] In this embodiment, the traffic condition information of each expected driving sub-section is composed of a plurality of traffic condition sub-item information, and these traffic condition sub-item information respectively represent the traffic conditions that affect the driving behavior and driving decision of the vehicle, such as the congestion condition, terrain, road conditions, weather, and driving habits of the adjacent vehicles, of the expected driving sub-section from different aspects. For example, the traffic condition information of an expected driving sub-section may include three traffic condition sub-item information, such as congestion degree information, slope information, and weather information. These traffic condition sub-item information may be quantitatively represented, for example, the congestion degree information may be represented by data such as average driving speed, the number of vehicles passing per unit time, or the number of vehicles contained in a cross section, the slope information may be represented by data such as angle or percentage, and the weather information may be represented by data such as wind speed, humidity, precipitation, temperature, or good grade (for example, heavy snow, rainstorm, and strong wind weather are defined as bad grades, light snow and light rain weather are defined as medium grades, and clear weather is defined as good grades, and grades are represented by numbers). Therefore, the traffic condition information of an expected driving sub-section may be represented as a vector in the form of (congestion degree information, slope information, weather information).

[0077] By executing step S104, the traffic condition information of each expected travel sub-segment can be obtained. For example, the expected travel sub-segment 1 has traffic condition information 1, which can be specifically expressed in the form of (congestion degree information 1, slope information 1, weather information 1); the expected travel sub-segment 3 has traffic condition information 3... The expected travel sub-segment m has traffic condition information m.

[0078] In step S105 , the control module may execute a clustering algorithm such as kmeans to cluster the traffic condition information obtained in step S104 .

[0079] The clustering algorithm executed in step S105 will cluster multiple identical or similar traffic condition information into the same category, while traffic condition information that is significantly different from other traffic condition information will be clustered into a separate category. Therefore, the following situations will occur:

[0080] 1. Multiple traffic condition information are grouped into the same category, and multiple expected driving sub-segments corresponding to these traffic condition information are also adjacent;

[0081] 2. Multiple traffic condition information are grouped into the same category, but the multiple expected driving sub-segments corresponding to these traffic condition information are not adjacent;

[0082] 3. Individual traffic condition information is grouped into one category.

[0083] In this embodiment, it is assumed that the traffic condition information 1 corresponding to the expected travel sub-segment 1 and the traffic condition information 2 corresponding to the expected travel sub-segment 2 belong to condition 1, that is, the traffic condition information 1 and the traffic condition information 2 are grouped into the same category, and the expected travel sub-segments 1 and 2 corresponding to them are also adjacent. Figure 4 For situation 1, execute step S106, which is the first division step, and combine the corresponding traffic condition information into the same category and multiple adjacent expected driving sub-segments into one section to be driven. For example, the expected driving sub-segment 1 and the expected driving sub-segment 2 are combined into one section to be driven, and the section to be driven 1 is obtained.

[0084] In this embodiment, it is assumed that the traffic condition information 3 corresponding to the expected travel sub-segment 3 and the traffic condition information 5 corresponding to the expected travel sub-segment 5 belong to situation 2, that is, the traffic condition information 3 and the traffic condition information 5 are clustered into the same category, but the expected travel sub-segments 3 and 5 corresponding to them are not adjacent. Figure 4 For situation 2, step S107, which is the second division step, is executed to separately determine the expected driving sub-section 3 as a section to be driven, that is, the section to be driven 2.

[0085] In this embodiment, it is assumed that the traffic condition information m corresponding to the estimated driving sub-segment m belongs to situation 3, that is, the traffic condition information m is grouped into one category. Figure 4 For situation 3, step S107, which is the second division step, is executed to separately determine the expected driving sub-section m as a section to be driven, that is, the section to be driven n.

[0086] By executing step S106-step S107, a plurality of adjacent estimated travel sub-segments whose traffic condition information is clustered into the same category can be combined into one to-be-traveled segment, so that a plurality of estimated travel sub-segments can be recombined into one or more to-be-traveled segments. Since each to-be-traveled segment is composed of estimated travel sub-segments whose traffic condition information can be clustered into one category, the traffic condition information in each to-be-traveled segment can be considered to be stable and unchanged (for example, to-be-traveled segment 1 is composed of estimated travel sub-segment 1 and estimated travel sub-segment 2, so to-be-traveled segment 1 is composed of estimated travel sub-segment 1 and estimated travel sub-segment 2, so to-be-traveled segment 2 is composed of estimated travel sub-segment 2 and estimated travel sub-segment 2). The traffic condition information corresponding to the driving section 1 can be regarded as the same as the expected driving sub-section 1, that is, the traffic condition information 1). Through the clustering operation, multiple expected driving sub-sections can be combined into a to-be-driven section as much as possible, thereby obtaining a to-be-driven section that is as long as possible; since the subsequent control of the range extender of the extended-range electric vehicle is carried out according to the upper limit of the range extender's power generation parameters determined by the traffic condition information, the to-be-driven section that is as long as possible can obtain the same upper limit of the range extender's power generation parameters over a longer continuous driving interval, thereby improving the stability of the range extender control.

[0087] In this embodiment, when the control module executes step S101 to obtain the estimated total driving section, the current position of the extended-range electric vehicle when executing step S101 can be used as the starting point of the estimated total driving section, and a length equivalent to the extended mileage can be extended in the direction of the destination, so that the extended section is used as the estimated total driving section. Among them, the size of the extended mileage can be set according to the initial power of the power battery in the extended-range electric vehicle (for example, the power size of the power battery when the extended-range electric vehicle executes step S101). Specifically, the extended mileage is negatively correlated with the initial power, that is, the smaller the initial power, the larger the extended mileage. At the same time, when executing step S102, the division granularity m can also be set to be negatively correlated with the initial power, that is, the smaller the initial power, the larger m.

[0088] In this embodiment, by setting the extended mileage and the division granularity to be negatively correlated with the initial power, the smaller the initial power of the extended-range electric vehicle, the longer the extended mileage and the larger the division granularity (the larger m is, the more parts the extended mileage is divided into) can be set; since the extended mileage is the total length of all sections to be traveled, the division granularity is the total number of sections to be traveled, and the traffic condition information corresponding to the sections to be traveled is used to determine the upper limit of the range extender's power generation parameters for controlling the range extender, it is possible to achieve a situation where the initial power of the extended-range electric vehicle is smaller, the longer the total length and the larger the number of sections to be traveled can be divided, thereby achieving more refined control of the range extender, which is conducive to meeting the demand for range extender control at low initial power.

[0089] In this embodiment, when executing step S2, that is, the step of obtaining the traffic condition information of each road section to be traveled, the following steps may be specifically performed:

[0090] S201. For any road section to be traveled, obtain multiple traffic condition sub-item information of the road section to be traveled;

[0091] S202. The traffic condition information of the road section to be traveled is formed by using each traffic condition sub-item information.

[0092] In this embodiment, when steps S104-S107 are executed, each road section to be traveled is composed of one or more corresponding expected traveling sub-sections, and the traffic condition sub-item information of each expected traveling sub-section in the same road section to be traveled is the same or similar. Therefore, when steps S201-S202 are executed, the traffic condition sub-item information of any expected traveling sub-section in the road section to be traveled can be used as the traffic condition sub-item information of this expected traveling sub-section, or the average value of the traffic condition sub-item information of all the expected traveling sub-sections in the road section to be traveled can be used as the traffic condition sub-item information of this expected traveling sub-section.

[0093] In this embodiment, the upper limit of the range extender power generation parameter to be determined in step S3 represents the upper limit of the working parameters of the range extender when the range extender is generating power in order to ensure safe and comfortable driving under the traffic information of the road section to be traveled when the range extender is traveling on the road section to be traveled. The upper limit of the range extender power generation parameter can specifically be data of the range extender's power generation power (power generation per unit time), power generation per unit distance of the range extender, speed of the range extender, etc.

[0094] For example, the traffic condition information in this embodiment can be expressed as a vector composed of multiple traffic condition sub-item information (congestion degree information, slope information, weather information), and each traffic condition sub-item information contributes to the upper limit of the range extender power generation parameter. For example, the greater the congestion degree indicated by the congestion degree information, the lower the driving speed of the range extender electric vehicle on the road section to be driven, and the greater the impact of the noise and vibration generated by the range extender when working on the driving, in order to ensure the comfort of driving, only a lower upper limit of the range extender power generation parameter can be set; the smaller the slope indicated by the slope information (positive slope is uphill, negative slope is downhill), it means that the burden on the range extender when the range extender electric vehicle is driven at the same speed is smaller, and the noise and vibration generated when the range extender is working are smaller, so a higher upper limit of the range extender power generation parameter can be set; the better the weather indicated by the weather information, it generally means that the noise and vibration generated by the range extender when working have less impact on driving, so a higher upper limit of the range extender power generation parameter can be set. Similarly, the traffic condition information may also include traffic condition sub-item information such as the mood information of the occupants identified by the on-board sensors called by the control module. The better the mood of the occupants as indicated by the on-board mood information, the less impact the noise and vibration generated by the range extender will have on the driving experience. Therefore, a higher upper limit of the range extender's power generation parameters can be set.

[0095] In this embodiment, the specific correspondence between the upper limit of the range extender power generation parameter and the traffic condition information can be determined by experimental calibration and other methods.

[0096] In this embodiment, when executing step S3, that is, for any road section to be traveled, determining the upper limit of the range extender power generation parameter according to the traffic condition information, the following steps can be specifically performed:

[0097] S301. For any road section to be traveled, respectively determine the weight information corresponding to each traffic condition sub-item information;

[0098] S302. Determine the weighted sum according to each traffic condition sub-item information and each weight information;

[0099] S303. Determine the upper limit of the range extender power generation parameter based on the weighted sum.

[0100] In step S301, since each traffic condition sub-item information can be quantified, weight information of corresponding signs and sizes can be set according to the positive and negative correlation between each traffic condition sub-item information and the upper limit of the range extender power generation parameter and the strength of the correlation. For example, in this embodiment, there is a strong positive correlation between the congestion degree information and the upper limit of the range extender power generation parameter, so a positive and large weight information can be set for the congestion degree information; there is a weak negative correlation between the slope information and the upper limit of the range extender power generation parameter, so a negative absolute value of the weight information can be set for the slope information; there is a weak positive correlation between the weather information and the upper limit of the range extender power generation parameter, so a positive and small weight information can be set for the weather degree information.

[0101] Reference Figure 5 Taking the road section 1 to be traveled as an example, in step S302, the traffic condition information 1 corresponding to the road section 1 to be traveled, i.e., each traffic condition sub-item information in (congestion degree information 1, slope information 1, weather information 1) is weighted and summed, and in step S303, the obtained weighted sum is used as the upper limit 1 of the power generation parameter of the range extender corresponding to the road section 1 to be traveled. Specifically, the weighted sum is positively correlated with the upper limit of the power generation parameter of the range extender, that is, the larger the weighted sum, the larger the upper limit of the power generation parameter of the range extender.

[0102] In this embodiment, the specific corresponding relationship between the weighted sum and the upper limit of the range extender power generation parameter can be determined by experimental calibration or the like.

[0103] In this embodiment, by executing steps S301-S303, the influence of each traffic condition sub-item information in the traffic condition information of the road section to be traveled on the driving comfort can be comprehensively considered, so as to quantitatively determine the upper limit of the range extender power generation parameter, and subsequently the range extender is controlled according to the upper limit of the range extender power generation parameter, that is, the working parameters of the range extender are controlled not to exceed the upper limit of the range extender power generation parameter, so as to ensure the driving comfort of the extended-range electric vehicle.

[0104] In this embodiment, when executing step S4, that is, controlling the range extender of the extended-range electric vehicle according to the upper limit of the power generation parameters of each range extender, the control module can limit the specific working parameters of the range extender according to the upper limit of the power generation parameters of each range extender throughout the expected total driving section. Figure 5, the control module calls the navigation module to detect the real-time position of the extended-range electric vehicle. When the extended-range electric vehicle travels to the expected driving sub-section 1, the control module controls the specific working parameters of the range extender (such as the rotation speed) to be below the upper limit 1 of the range extender's power generation parameters; when the extended-range electric vehicle travels to the expected driving sub-section 2, the control module controls the specific working parameters of the range extender to be below the upper limit 2 of the range extender's power generation parameters... When the extended-range electric vehicle travels to the expected driving sub-section n, the control module controls the specific working parameters of the range extender to be below the upper limit n of the range extender's power generation parameters.

[0105] Since the upper limit of the range extender's power generation parameters corresponding to each expected driving sub-section is determined according to the traffic conditions information of the expected driving sub-section and is the maximum value of the range extender's operating parameters that can ensure driving comfort, limiting the specific operating parameters of the range extender according to the upper limit of the range extender's power generation parameters can ensure that the range extender does not emit excessive noise or produce excessive vibration, thereby ensuring driving comfort, and being able to generate electricity at the largest possible operating parameters within the expected driving sub-section, thereby meeting the extended-range electric vehicle's demand for the range extender's power output.

[0106] In this embodiment, when executing step S4, that is, the step of controlling the range extender of the extended-range electric vehicle according to the upper limit of the power generation parameter of each range extender, the following steps may be specifically performed:

[0107] S401A. Obtaining the initial power of the extended-range electric vehicle;

[0108] S402A. For any road section to be traveled, obtain the estimated power consumption and estimated power generation of the road section to be traveled;

[0109] S403A. When the sum of the initial power and all expected power generation is greater than the sum of all expected power consumption, determine the balance point;

[0110] S404A. Before the extended-range electric vehicle reaches the equilibrium point, the range extender of the extended-range electric vehicle is controlled to generate electricity according to the upper limit of the range extender power generation parameter corresponding to the position;

[0111] S405A. After the extended-range electric vehicle reaches the equilibrium point, the range extender of the extended-range electric vehicle is controlled to suspend power generation.

[0112] The initial power obtained in step S401A is Q ini .

[0113] In step S402A, the power consumption per unit length and the estimated travel time of the extended-range electric vehicle in the section to be traveled can be determined by table lookup or the like based on the traffic condition information of the section to be traveled, and then the estimated power consumption of the section to be traveled is calculated based on the power consumption per unit length and the length of the section to be traveled. Based on the estimated travel time and the upper limit of the power generation parameters of the range extender, the power generation generated by the range extender of the extended-range electric vehicle during the entire section to be traveled according to the upper limit of the power generation parameters of the range extender is calculated, that is, the estimated power generation.

[0114] By executing step S402A, it is possible to obtain the estimated power consumption 1 and estimated power generation 1 corresponding to the road section 1 to be traveled, the estimated power consumption 2 and estimated power generation 2 corresponding to the road section 2 to be traveled, and ... the estimated power consumption n and estimated power generation n corresponding to the road section n to be traveled. For example, the estimated power consumption 1 represents the electric energy (which may be provided by one or both of the range extender and the power battery) that the range-extended electric vehicle is expected to consume when driving from the starting point of the road section 1 to be traveled to the end point of the road section 1 to be traveled; the estimated power generation 1 represents the electric energy output by the range extender during the entire process of driving the range-extended electric vehicle from the starting point of the road section 1 to be traveled to the end point of the road section 1 to be traveled according to the upper limit 1 of the range extender power generation parameter.

[0115] In this embodiment, the control module performs calculations. If the sum of the initial power and the total estimated power generation is less than the sum of the total estimated power consumption, that is,

[0116] Initial power Q ini + (estimated power generation 1 + estimated power generation 2 + ... + estimated power generation n) < (estimated power consumption 1 + estimated power consumption 2 + ... + estimated power consumption n)

[0117] Since the left side of the inequality represents the total electric energy that the range extender and the power battery can output for the entire expected driving section of the extended-range electric vehicle, and the right side represents the electric energy that the extended-range electric vehicle needs to consume for the entire expected driving section (in this embodiment, only the electric energy consumed by the motor is considered), the inequality indicates that if the range extender is restricted according to the upper limit of the range extender's power generation parameters, the electric energy will be insufficient for the motor to consume. In this case, the control module can release the control of the range extender, that is, the power generation of the range extender is no longer restricted by the upper limit of the range extender's power generation parameters.

[0118] If the sum of the initial power and the total estimated power generation is greater than the sum of the total estimated power consumption, that is,

[0119] Initial power Q ini + (estimated power generation 1 + estimated power generation 2 + ... + estimated power generation n) > (estimated power consumption 1 + estimated power consumption 2 + ... + estimated power consumption n)

[0120] This indicates that if the range extender is restricted according to the upper limit of the range extender power generation parameter, the electric energy provided by the range extender and the power battery is sufficient for the motor to consume, and the control module can execute step S403A.

[0121] In step S403A, the control module can calculate a balance point, which is a point in all the sections to be traveled, that is, the total estimated travel section. The sum of the estimated power generation and initial power of each section to be traveled before the balance point is equal to the sum of the estimated power consumption of all the sections to be traveled.

[0122] For example, assuming that this balance point is the end point of the road section i to be traveled, then the sum of the initial power and the estimated power generation of each road section to be traveled before the balance point (that is, road section 1 to be traveled, road section 2 to be traveled...road section i to be traveled) (that is, estimated power generation 1, estimated power generation 2...estimated power generation i) is equal to the sum of the estimated power consumption of all the road sections to be traveled (that is, road section 1 to be traveled, road section 2 to be traveled...road section n to be traveled) (that is, estimated power consumption 1+estimated power consumption 2+...+estimated power consumption n), so there is

[0123] Initial power Q ini + (estimated power generation 1 + estimated power generation 2 + ... + estimated power generation i) = (estimated power consumption 1 + estimated power consumption 2 + ... + estimated power consumption n)

[0124] Therefore, the control module can determine the size of i by solving the above equation, thereby determining the specific position of the balance point. In this embodiment, i may not be an integer, which is equivalent to the balance point being inside a certain road section to be driven rather than the end point. At this time, a non-integer i can be selected to determine the position of the balance point, or i can be adjusted to its closest integer to determine the position of the balance point.

[0125] After determining the position of the balance point, the control module executes steps S404A-S405A. Figure 6, assuming that the balance point is the end point of the road section 2 to be traveled. The control module calls the navigation module to detect the real-time position of the extended-range electric vehicle. Before the extended-range electric vehicle reaches the balance point, step S404A is executed to control the range extender of the extended-range electric vehicle to generate electricity according to the upper limit of the range extender power generation parameter corresponding to the position. For example, when the extended-range electric vehicle reaches the road section 1 to be traveled, the control module controls the range extender to generate electricity according to the range extender power generation parameter 1. When the extended-range electric vehicle reaches the road section 2 to be traveled, the control module controls the range extender to generate electricity according to the range extender power generation parameter 2. After the extended-range electric vehicle reaches the balance point, step S405A is executed to control the range extender of the extended-range electric vehicle to suspend power generation. For example, when the extended-range electric vehicle reaches the road section 3 to be traveled, the range extender does not generate electricity until the end point of the road section n to be traveled, that is, the end point of the total travel section.

[0126] In this embodiment, the principle of executing steps S401A-S405A is that the range extender of the extended-range electric vehicle generates electricity according to the power generation parameters of each range extender before the balance point, and the electric energy generated by the range extender together with the electric energy provided by the power battery can meet the power consumption of the extended-range electric vehicle over the entire expected total driving section. Therefore, the power generation of the range extender of the extended-range electric vehicle before the balance point can ensure driving comfort, and the suspension of power generation after the balance point can avoid noise and vibration generated by the range extender, thereby further improving driving comfort.

[0127] In this embodiment, when executing step S4, that is, the step of controlling the range extender of the extended-range electric vehicle according to the upper limit of the power generation parameter of each range extender, the following steps may be specifically performed:

[0128] S401B. Obtaining the initial power of the extended-range electric vehicle;

[0129] S402B. For any road section to be traveled, obtain the estimated power consumption and estimated power generation of the road section to be traveled;

[0130] S403B. When the sum of the initial power and the total estimated power generation is greater than the sum of the total estimated power consumption, determine the reduction ratio coefficient;

[0131] S404B. Lower the upper limit of each range extender power generation parameter according to the lowering proportional coefficient;

[0132] S405B. Control the range extender of the extended-range electric vehicle to generate electricity according to the lowered upper limit of the range extender power generation parameter corresponding to the location.

[0133] In this embodiment, the principles of steps S401B-S402B are the same as those of steps S401A-S402A.

[0134] If the sum of the initial power and the total estimated power generation is greater than the sum of the total estimated power consumption, that is,

[0135] Initial power Q ini + (estimated power generation 1 + estimated power generation 2 + ... + estimated power generation n) > (estimated power consumption 1 + estimated power consumption 2 + ... + estimated power consumption n)

[0136] This indicates that if the range extender is restricted according to the upper limit of the range extender power generation parameter, the electric energy provided by the range extender and the power battery is sufficient for the motor to consume, and the control module can execute step S403B.

[0137] In step S403B, the control module can calculate a reduction ratio coefficient p% (in this embodiment, p% <1). If the reduction ratio coefficient p% is used to uniformly reduce the upper limit of the power generation parameters of each range extender, since the upper limit of the power generation parameter of the range extender is positively correlated with the expected power generation (for example, the upper limit 1 of the power generation parameter of the range extender is generally in positive proportion to the expected power generation 1), then each expected power generation is also equivalent to being uniformly reduced by the reduction ratio coefficient p%, so that the sum of the initial power and the total expected power generation after the reduction is equal to the sum of all expected power consumption, that is:

[0138] Initial power Q ini + p% × (estimated power generation 1 + estimated power generation 2 + ... + estimated power generation n) = (estimated power consumption 1 + estimated power consumption 2 + ... + estimated power consumption n)

[0139] The control module can determine the size of the reduction proportional coefficient p% by solving the above equation.

[0140] After determining the size of the proportional coefficient p%, the control module executes steps S404B-S405B. In step S404B, refer to Figure 7 The control module uniformly lowers the upper limits of the power generation parameters of each range extender with this reduction ratio coefficient p%. For example, the upper limit 1 of the power generation parameter of the range extender is adjusted to p%×the upper limit 1 of the power generation parameter of the range extender, the upper limit 2 of the power generation parameter of the range extender is adjusted to p%×the upper limit 2 of the power generation parameter of the range extender...and the upper limit n of the power generation parameter of the range extender is adjusted to p%×the upper limit n of the power generation parameter of the range extender.

[0141] In step S405B, the control module controls the range extender of the extended-range electric vehicle to generate electricity according to the lowered upper limit of the range extender power generation parameter corresponding to the location. For example, when the extended-range electric vehicle reaches the road section 1 to be driven, the control module controls the range extender to generate electricity according to p%×range extender power generation parameter 1, when the extended-range electric vehicle reaches the road section 2 to be driven, the control module controls the range extender to generate electricity according to p%×range extender power generation parameter 2... When the extended-range electric vehicle reaches the road section n to be driven, the control module controls the range extender to generate electricity according to p%×range extender power generation parameter n.

[0142] In this embodiment, the principle of executing steps S401B-S405B is that after lowering the upper limit of the power generation parameters of each range extender by using the lowering proportional coefficient, the electric energy generated by the range extender together with the electric energy provided by the power battery can also meet the power consumption of the extended-range electric vehicle over the entire expected total driving section; since the upper limit of the power generation parameters of each range extender is lowered, the actual working parameters of the range extender will also be lowered, thereby further reducing the noise and vibration generated by the range extender and further improving the driving comfort.

[0143] A computer program for executing the control method of the extended-range electric vehicle in this embodiment can be written and written into a computer device or a storage medium. When the computer program is read out and executed, the control method of the extended-range electric vehicle in this embodiment is executed, thereby achieving the same technical effect as the control method of the extended-range electric vehicle in the embodiment.

[0144] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present disclosure are only relative to the relative positional relationship of the components of the present disclosure in the accompanying drawings. The singular forms of "a", "" and "the" used in the present disclosure are also intended to include the plural forms, unless the context clearly indicates other meanings. In addition, unless otherwise defined, all technical and scientific terms used in this embodiment have the same meaning as those generally understood by those skilled in the art. The terms used in the specification of this embodiment are only for describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this embodiment includes any combination of one or more related listed items.

[0145] It should be understood that, although the term first, second, third etc. may be adopted to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish the same type of elements from each other. For example, without departing from the scope of the present disclosure, the first element may also be referred to as the second element, and similarly, the second element may also be referred to as the first element. The use of any and all examples or exemplary language ("for example", "such as" etc.) provided by the present embodiment is only intended to better illustrate embodiments of the present invention, and unless otherwise required, the scope of the present invention will not be limited.

[0146] It should be appreciated that embodiments of the present invention may be implemented or enforced by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer-readable memory. The method may be implemented in a computer program using standard programming techniques - including a non-transitory computer-readable storage medium configured with a computer program, wherein the storage medium so configured causes the computer to operate in a specific and predefined manner - according to the methods and drawings described in the specific embodiments. Each program may be implemented in a high-level procedural or object-oriented programming language to communicate with a computer system. However, if desired, the program may be implemented in assembly or machine language. In any case, the language may be a compiled or interpreted language. In addition, the program may be run on a programmed dedicated integrated circuit for this purpose.

[0147] In addition, the operations of the process described in this embodiment may be performed in any suitable order, unless otherwise indicated in this embodiment or otherwise clearly contradicted by the context. The process described in this embodiment (or variations and / or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as a code (e.g., executable instructions, one or more computer programs, or one or more applications) executed on one or more processors in common, by hardware or a combination thereof. A computer program includes a plurality of instructions that may be executed by one or more processors.

[0148] Further, the method can be implemented in any type of computing platform that is operably connected to a suitable computer, including but not limited to a personal computer, a minicomputer, a mainframe, a workstation, a network or distributed computing environment, a separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, etc. Various aspects of the present invention can be implemented in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, an optical read and / or write storage medium, a RAM, a ROM, etc., so that it can be read by a programmable computer, and when the storage medium or device is read by the computer, it can be used to configure and operate the computer to perform the process described herein. In addition, the machine-readable code, or part thereof, can be transmitted via a wired or wireless network. When such media includes instructions or programs that implement the above steps in conjunction with a microprocessor or other data processor, the invention of this embodiment includes these and other different types of non-transitory computer-readable storage media. When programmed according to the methods and techniques of the present invention, the present invention also includes the computer itself.

[0149] The computer program can be applied to input data to perform the functions of the present embodiment, thereby converting the input data to generate output data stored in a non-volatile memory. The output information can also be applied to one or more output devices such as a display. In a preferred embodiment of the present invention, the converted data represents a physical and tangible object, including a specific visual depiction of the physical and tangible object produced on the display.

[0150] The above are only preferred embodiments of the present invention. The present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by the same means, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. Within the scope of protection of the present invention, its technical solutions and / or implementation methods may have various modifications and changes.

Claims

1. A control method for an extended-range electric vehicle, characterized in that: The control method of the extended-range electric vehicle comprises: Determining at least one road section to be traveled by the extended-range electric vehicle; Obtaining the traffic condition information of each of the road sections to be traveled; For any of the road sections to be traveled, determining an upper limit of the range extender power generation parameter according to the traffic condition information; The range extender of the extended-range electric vehicle is controlled according to the upper limits of the power generation parameters of each range extender.

2. The control method of the extended-range electric vehicle according to claim 1, characterized in that: The obtaining of the traffic condition information of each of the road sections to be traveled comprises: For any of the road sections to be traveled, a plurality of sub-item information of traffic conditions of the road section to be traveled is obtained; each of the sub-item information of traffic conditions includes congestion degree information, slope information and weather information; The traffic condition information of the road section to be traveled is composed of each of the traffic condition sub-item information.

3. The control method of the extended-range electric vehicle according to claim 2, characterized in that: For any of the road sections to be traveled, determining the upper limit of the range extender power generation parameter according to the traffic condition information includes: For any of the road sections to be traveled, respectively determine the weight information corresponding to each of the traffic condition sub-item information; Determine a weighted sum according to each of the traffic condition sub-item information and each of the weight information; An upper limit of the power generation parameter of the range extender is determined according to the weighted sum.

4. The control method of the extended-range electric vehicle according to claim 1, characterized in that: The controlling of the range extender of the extended-range electric vehicle according to the upper limits of the power generation parameters of each range extender includes: Obtaining the initial power of the extended-range electric vehicle; For any of the sections to be traveled, the estimated power consumption and the estimated power generation of the section to be traveled are obtained; the estimated power generation is the power generation generated by the range extender of the extended-range electric vehicle according to the upper limit of the range extender power generation parameter at the section to be traveled; When the sum of the initial power and all the expected power generation is greater than the sum of all the expected power consumption, a balance point is determined; the balance point is a point in all the sections to be traveled, and the sum of each of the expected power generation and the initial power of each section to be traveled before the balance point is equal to the sum of each of the expected power consumption of all the sections to be traveled; Before the extended-range electric vehicle reaches the balance point, controlling the range extender of the extended-range electric vehicle to generate electricity according to the upper limit of the range extender power generation parameter corresponding to the position; After the extended-range electric vehicle reaches the balance point, the range extender of the extended-range electric vehicle is controlled to suspend power generation.

5. The control method of the extended-range electric vehicle according to claim 1, characterized in that: The controlling of the range extender of the extended-range electric vehicle according to the upper limits of the power generation parameters of each range extender includes: Obtaining the initial power of the extended-range electric vehicle; For any of the sections to be traveled, the estimated power consumption and the estimated power generation of the section to be traveled are obtained; the estimated power generation is the power generation generated by the range extender of the extended-range electric vehicle according to the upper limit of the range extender power generation parameter at the section to be traveled; When the sum of the initial power and all the expected power generation is greater than the sum of all the expected power consumption, a reduction ratio coefficient is determined; the reduction ratio coefficient is used to respectively reduce the upper limit of the power generation parameter of each range extender, so that the sum of the initial power and all the expected power generation after the reduction is equal to the sum of all the expected power consumption; According to the reduction ratio coefficient, respectively lower the upper limit of the power generation parameter of each range extender; The range extender of the extended-range electric vehicle is controlled to generate electricity according to the lowered upper limit of the power generation parameter of the range extender corresponding to the location.

6. The control method of the extended-range electric vehicle according to any one of claims 1 to 5, characterized in that: The step of determining at least one road section to be traveled by the extended-range electric vehicle comprises: Obtain the total estimated driving distance of the extended-range electric vehicle in the future period; Determine the partition granularity; Dividing the total estimated travel section according to the division granularity to obtain a plurality of estimated travel sub-sections; Obtaining the traffic condition information of each of the estimated travel sub-segments; Clustering the traffic condition information of each of the expected travel sub-segments; Executing a first division step, combining a plurality of adjacent estimated travel sub-segments whose corresponding traffic condition information is clustered into the same category into one to-be-traveled segment; The second division step is performed to individually determine the expected travel sub-sections that are not combined into the to-be-traveled section in the first division step as the to-be-traveled section.

7. The control method of the extended-range electric vehicle according to claim 6, characterized in that: The method of obtaining the total estimated driving distance of the extended-range electric vehicle in a future period of time includes: Get the current location of the extended-range electric vehicle; Determine the extended mileage; Extending from the current location destination direction according to the extended mileage; The extended road section is used as the estimated total travel section.

8. The control method of the extended-range electric vehicle according to claim 7, characterized in that: The determining of the extended mileage includes: Obtaining the initial power of the extended-range electric vehicle; The extended mileage is determined according to the initial power; the extended mileage is negatively correlated with the initial power.

9. A computer device, characterized in that: It comprises a memory and a processor, the memory is used to store at least one program, and the processor is used to load at least one program to execute the control method of the extended-range electric vehicle as described in any one of claims 1-8.

10. A computer-readable storage medium storing a program executable by a processor, characterized in that: The program executable by the processor is used to execute the control method of the extended-range electric vehicle as described in any one of claims 1 to 8 when executed by the processor.

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