Range Extender Control Method, Device and Range-Extended Electric Vehicle Based on Driving Mileage

Abstract

This application relates to the field of automotive technologies, and provides a control method, device, and range-extended electric vehicle based on driving mileage. The method includes: when the total mileage is greater than the pure electric mileage: calculating the smooth proportion and congestion proportion based on the total mileage, congestion mileage, and smooth mileage; determining a first power generation weight for the smooth mileage based on the smooth proportion, and determining a second power generation weight for the congestion mileage based on the first power generation weight; calculating a first power generation amount for the smooth mileage and a second power generation amount for the congestion mileage according to the total power generation amount, the first power generation weight, and the second power generation weight; calculating a first power generation power for the smooth mileage and a second power generation power for the congestion mileage according to the first power generation amount, the second power generation amount, the smooth proportion, the congestion proportion, and the total time; controlling the range extender of the range-extended electric vehicle to generate power at the first power generation power during the smooth mileage, and controlling the range extender of the range-extended electric vehicle to generate power at the second power generation power during the congestion mileage.

Description

Technical Field

[0001] The present application relates to the technical field of automobiles, and in particular, to a control method, device and range-extended electric vehicle based on driving mileage. Background Art

[0002] The biggest advantage of a range-extended electric vehicle compared to a pure electric vehicle is that it has a longer cruising range. That is, when the power battery runs out of power, the range extender converts fuel energy into electrical energy to drive the vehicle. Currently, the range extender is started only when the battery level of the range-extended vehicle drops to the threshold for starting the range extender. In fact, the power generation efficiency of the range extender is related to the road section. The power generation efficiency of the range extender is lower in congested road sections and higher in unobstructed road sections. However, the current control of the range extender is only related to the battery level and does not take into account different road sections of the driving mileage. Summary of the Invention

[0003] In view of this, the embodiments of the present application provide a control method, device and range-extended electric vehicle based on driving mileage to solve the problem in the prior art that the control efficiency of the range extender in a range-extended electric vehicle is low because different road sections of the driving mileage are not considered.

[0004] In the first aspect of the embodiments of the present application, a control method for a range extender based on driving mileage is provided, including: determining the total mileage and total time of the current trip and the pure electric mileage of the range-extended electric vehicle; when the total mileage is greater than the pure electric mileage: calculating the total power generation of the range extender of the range-extended electric vehicle in the current trip according to the difference between the total mileage and the pure electric mileage; obtaining the road condition information of the current trip, and dividing the total mileage into congested mileage and unobstructed mileage according to the road condition information; calculating the unobstructed proportion and the congested proportion based on the total mileage, the congested mileage and the unobstructed mileage; determining the first power generation weight of the unobstructed mileage based on the unobstructed proportion, and determining the second power generation weight of the congested mileage based on the first power generation weight; calculating the first power generation amount of the unobstructed mileage and the second power generation amount of the congested mileage according to the total power generation amount, the first power generation weight and the second power generation weight; calculating the first power generation power of the unobstructed mileage and the second power generation power of the congested mileage according to the first power generation amount, the second power generation amount, the unobstructed proportion, the congested proportion and the total time; in the unobstructed mileage, controlling the range extender of the range-extended electric vehicle to generate power according to the first power generation power, and in the congested mileage, controlling the range extender of the range-extended electric vehicle to generate power according to the second power generation power.

[0005] In a second aspect of the embodiments of the present application, a range extender control device based on driving mileage is provided, including: a determination module configured to determine the total mileage and total time of the current trip and the pure electric mileage of the range extender electric vehicle; a first calculation module configured to, when the total mileage is greater than the pure electric mileage: calculate the total power generation of the range extender of the range extender electric vehicle during the current trip according to the difference between the total mileage and the pure electric mileage; a division module configured to obtain the road condition information of the current trip and divide the total mileage into congested mileage and unobstructed mileage according to the road condition information; a second calculation module configured to calculate the unobstructed proportion and the congested proportion based on the total mileage, the congested mileage, and the unobstructed mileage; a second determination module configured to determine a first power generation weight for the unobstructed mileage based on the unobstructed proportion and determine a second power generation weight for the congested mileage based on the first power generation weight; a third calculation module configured to calculate a first power generation amount for the unobstructed mileage and a second power generation amount for the congested mileage according to the total power generation amount, the first power generation weight, and the second power generation weight; a fourth calculation module configured to calculate a first power generation power for the unobstructed mileage and a second power generation power for the congested mileage according to the first power generation amount, the second power generation amount, the unobstructed proportion, the congested proportion, and the total time; a control module configured to, during the unobstructed mileage, control the range extender of the range extender electric vehicle to generate power according to the first power generation power, and during the congested mileage, control the range extender of the range extender electric vehicle to generate power according to the second power generation power.

[0006] In a third aspect of the embodiments of the present application, a range extender electric vehicle is provided, including a memory, a main control module, and a computer program stored in the memory and executable on the main control module. When the main control module executes the computer program, the steps of the above method are implemented.

[0007] The beneficial effects of the embodiments of the present application compared with the prior art at least include: In the embodiments of the present application, the total mileage and total time of the current trip and the pure electric mileage of the range-extended electric vehicle are determined; when the total mileage is greater than the pure electric mileage: the total power generation of the range extender of the range-extended electric vehicle during the current trip is calculated based on the difference between the total mileage and the pure electric mileage; the road condition information of the current trip is obtained, and the total mileage is divided into congested mileage and unobstructed mileage according to the road condition information; the unobstructed ratio and congested ratio are calculated based on the total mileage, congested mileage, and unobstructed mileage; the first power generation weight of the unobstructed mileage is determined based on the unobstructed ratio, and the second power generation weight of the congested mileage is determined based on the first power generation weight; according to the total power generation, the first power generation weight, and the second power generation weight, the first power generation amount of the unobstructed mileage and the second power generation amount of the congested mileage are calculated; according to the first power generation amount, the second power generation amount, the unobstructed ratio, the congested ratio, and the total time, the first power generation power of the unobstructed mileage and the second power generation power of the congested mileage are calculated; in the unobstructed mileage, the range extender of the range-extended electric vehicle is controlled to generate power according to the first power generation power, and in the congested mileage, the range extender of the range-extended electric vehicle is controlled to generate power according to the second power generation power. By adopting the above technical means, the problem that the control efficiency of the range extender in the prior art is low due to the failure to consider different road sections of the driving mileage can be solved, thereby improving the control efficiency of the range extender of the range-extended electric vehicle, reducing emissions and vehicle use costs, and improving the vehicle use experience of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0009] Figure 1 It is a schematic flowchart of a range extender control method based on driving mileage provided by an embodiment of the present application;

[0010] Figure 2 It is a schematic flowchart of another range extender control method based on driving mileage provided by an embodiment of the present application;

[0011] Figure 3 It is a schematic structural diagram of a range extender control device based on driving mileage provided by an embodiment of the present application;

[0012] Figure 4 It is a schematic structural diagram of a range-extended electric vehicle provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] In the following description, specific details such as specific system architectures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0014] Figure 1 It is a schematic flow chart of a range extender control method based on driving mileage provided by an embodiment of the present application. Figure 1 The range extender control method based on driving mileage can be executed by a main control module provided on a range-extended electric vehicle. Optionally, Figure 1 The range extender control method based on driving mileage can also be executed by a computer or a general server, or software on a computer or a general server. Taking the main control module as the execution entity as an example, the range extender control method based on driving mileage includes:

[0015] S101, determining the total mileage and total time of this trip and the pure electric mileage of the range-extended electric vehicle;

[0016] S102, when the total mileage is greater than the pure electric mileage, calculating the total power generation of the range extender of the range-extended electric vehicle in this trip according to the difference between the total mileage and the pure electric mileage;

[0017] S103, obtaining the road condition information of this trip, and dividing the total mileage into congested mileage and unobstructed mileage according to the road condition information;

[0018] S104, calculating the unobstructed proportion and congested proportion based on the total mileage, congested mileage, and unobstructed mileage;

[0019] S105, determining the first power generation weight of the unobstructed mileage based on the unobstructed proportion, and determining the second power generation weight of the congested mileage based on the first power generation weight;

[0020] S106, calculating the first power generation amount of the unobstructed mileage and the second power generation amount of the congested mileage according to the total power generation amount, the first power generation weight, and the second power generation weight;

[0021] S107, calculating the first power generation power of the unobstructed mileage and the second power generation power of the congested mileage according to the first power generation amount, the second power generation amount, the unobstructed proportion, the congested proportion, and the total time;

[0022] S108, in the unobstructed mileage, controlling the range extender of the range-extended electric vehicle to generate power according to the first power generation power, and in the congested mileage, controlling the range extender of the range-extended electric vehicle to generate power according to the second power generation power.

[0023] Specifically: According to the starting point and the ending point of this trip, the total mileage and total time of this trip can be obtained through a navigation software. According to vehicle information such as the battery power and mass of the range-extended electric vehicle, the pure electric mileage of the range-extended electric vehicle can be determined. The pure electric mileage is the total distance that the range-extended electric vehicle travels only relying on the battery power without starting the range extender. When the total mileage is greater than the pure electric mileage, it indicates that the battery power is not sufficient to support the range-extended electric vehicle to complete this trip. In this case, a solution needs to be designed to control the power generation of the range extender of the range-extended electric vehicle to increase the endurance of the range-extended electric vehicle. The embodiment of this application is to design a solution for controlling the power generation of the range extender based on the unobstructed mileage (unobstructed mileage) and congested mileage (congested mileage) of the driving mileage for this situation. The total power generation calculated is used to support the mileage other than the pure electric mileage in the total mileage of the range-extended electric vehicle. Calculating the power required for the vehicle to travel a certain mileage is the prior art and will not be elaborated here. Different unobstructed ratios correspond to corresponding first power generation weights. For example, when the unobstructed ratios are 0, 0.2, 0.4, 0.6, 0.8, and 1, the corresponding first power generation weights are 0, 0.4, 0.6, 0.8, 0.95, and 1 respectively. The sum of the first power generation weight and the second power generation weight is 1, and then the second power generation weight of the congested mileage is determined.

[0024] According to the technical solution provided by the embodiment of this application, determine the total mileage and total time of this trip and the pure electric mileage of the range-extended electric vehicle; when the total mileage is greater than the pure electric mileage: calculate the total power generation of the range extender of the range-extended electric vehicle in this trip according to the difference between the total mileage and the pure electric mileage; obtain the road condition information of this trip, and divide the total mileage into congested mileage and unobstructed mileage according to the road condition information; calculate the unobstructed ratio and congested ratio based on the total mileage, congested mileage, and unobstructed mileage; determine the first power generation weight of the unobstructed mileage based on the unobstructed ratio, and determine the second power generation weight of the congested mileage based on the first power generation weight; calculate the first power generation amount of the unobstructed mileage and the second power generation amount of the congested mileage according to the total power generation, the first power generation weight, and the second power generation weight; calculate the first power generation power of the unobstructed mileage and the second power generation power of the congested mileage according to the first power generation amount, the second power generation amount, the unobstructed ratio, the congested ratio, and the total time; in the unobstructed mileage, control the range extender of the range-extended electric vehicle to generate power according to the first power generation power, and in the congested mileage, control the range extender of the range-extended electric vehicle to generate power according to the second power generation power. By adopting the above technical means, the problem that in the control of the range extender of the range-extended electric vehicle in the prior art, due to the failure to consider different road sections of the driving mileage, the control efficiency of the range extender is low can be solved, thereby improving the control efficiency of the range extender of the range-extended electric vehicle, reducing emissions and vehicle use costs, and improving the vehicle use experience of users.

[0025] Further, calculate the unobstructed ratio, congested ratio, first power generation weight, and second power generation weight through the following formulas:

[0026] R 拥堵 = S 拥堵 / S 总

[0027] R 畅通 = S 畅通 / S 总

[0028] W1 = U1 * W 总

[0029] W2 = U2 * W 总

[0030] Wherein, R 拥堵 is the congestion ratio, S 拥堵 is the congestion mileage, S 总 is the total mileage, R 畅通 is the unobstructed ratio, S 畅通 is the unobstructed mileage, W1 is the first power generation amount, U1 is the first power generation weight, W 总 is the total power generation amount, W2 is the second power generation amount, U2 is the second power generation weight.

[0031] The result of dividing the unobstructed mileage by the total mileage is the unobstructed ratio, and the result of dividing the congestion mileage by the total mileage is the congestion ratio; the result of multiplying the total power generation amount and the first power generation weight is used as the first power generation amount; the result of multiplying the total power generation amount and the second power generation weight is used as the second power generation amount.

[0032] Furthermore, the first power generation power and the second power generation power are calculated through the following formulas:

[0033] P1 = W1 / (R 畅通 * T 总 )

[0034] P2 = W2 / (R 拥堵 * T 总 )

[0035] Wherein, P1 is the first power generation power, W1 is the first power generation amount, R 畅通 is the unobstructed ratio, T 总 is the total time, P2 is the second power generation power, W2 is the second power generation amount, R 拥堵 is the congestion ratio.

[0036] The result of dividing the first power generation amount by the unobstructed ratio and then by the total time is used as the first power generation power; the result of dividing the second power generation amount by the congestion ratio and then by the total time is used as the second power generation power.

[0037] In an alternative embodiment, after calculating the first power generation of the unobstructed mileage and the second power generation of the congested mileage based on the first power generation amount, the second power generation amount, the unobstructed ratio, the congestion ratio, and the total time, the method further includes: obtaining the operating power of a plurality of accessories started on the range extender electric vehicle during this trip; multiplying the sum of the operating powers of the plurality of accessories by the total time to obtain the total accessory power generation amount corresponding to the plurality of accessories; updating the total power generation amount by using the total accessory power generation amount, and updating the first power generation and the second power generation according to the updated total power generation amount.

[0038] Each accessory in the vehicle is {A1, A2, …, A n}, and the operating power of the accessories is {P1, P2, …, P n}, and the result of (P1 + P2 + …… + P n ) * T 总 is used as the total accessory power generation amount.

[0039] Specifically: the sum of the total accessory power generation amount and the total power generation amount is used as the updated total power generation amount; the result of multiplying the updated total power generation amount by the first power generation weight is used as the updated first power generation amount; the result of multiplying the updated total power generation amount by the second power generation weight is used as the updated second power generation amount; the result of dividing the updated first power generation amount by the unobstructed ratio and then dividing by the total time is used as the updated first power generation; the result of dividing the updated second power generation amount by the congestion ratio and then dividing by the total time is used as the updated second power generation.

[0040] Figure 2 is a schematic flowchart of another range extender control method based on driving mileage provided by an embodiment of the present application, which is executed by the main control module. As Figure 2 shown, it includes:

[0041] When the total mileage is less than or equal to the pure electric mileage:

[0042] S201, control the range extender electric vehicle to travel without starting the range extender. When the power of the range extender electric vehicle drops to a preset threshold, determine the remaining mileage and remaining time of this trip, and the remaining pure electric mileage of the range extender electric vehicle;

[0043] S202, when the remaining mileage is greater than the remaining pure electric mileage: calculate the vehicle energy consumption and the total accessory energy consumption corresponding to the range extender electric vehicle and a plurality of accessories started on the range extender electric vehicle respectively during the remaining mileage;

[0044] S203, calculate the third power generation according to the vehicle energy consumption, the total accessory energy consumption, and the remaining time;

[0045] S204, when the power of the range extender electric vehicle drops to a preset threshold, start and control the range extender to generate power according to the third power generation.

[0046] The total mileage of this trip can be divided into the driven mileage and the remaining mileage, and the total time can be divided into the used time and the remaining time; when the battery level of the range-extended electric vehicle drops to a preset threshold, the distance traveled by the range-extended electric vehicle is the driven mileage, otherwise it is the remaining mileage; when the battery level of the range-extended electric vehicle drops to a preset threshold, the time spent by the range-extended electric vehicle is the used time, otherwise it is the remaining time; the distance that the range-extended electric vehicle can complete only with the support of the current remaining battery level is the remaining pure-electric mileage. The result of dividing the sum of the vehicle energy consumption and the total accessory energy consumption by the remaining time is used as the third power generation power. Optionally, the result of dividing the sum of the vehicle energy consumption, the total accessory energy consumption and a preset energy consumption by the remaining time is used as the third power generation power.

[0047] If the electricity consumed by the accessories is not considered (the embodiments in the above text do not consider the electricity consumed by the accessories), then when the total mileage is less than or equal to the pure-electric mileage (the pure-electric mileage is the total distance that the range-extended electric vehicle travels only relying on the battery power without starting the range extender and accessories), it means that the battery power is sufficient to support the range-extended electric vehicle to complete this trip. However, in fact, in many cases, some accessories on the range-extended electric vehicle will be turned on during each trip, such as turning on the PTC heater for heating, turning on the compressor for refrigeration, turning on the seat massage, etc. Because these accessories will consume some electricity, even if the total mileage is less than or equal to the pure-electric mileage, there may still be a situation where the battery power is not sufficient to support the range-extended electric vehicle to complete this trip. This situation needs to judge the relationship between the remaining mileage and the remaining pure-electric mileage. If the remaining mileage is less than or equal to the remaining pure-electric mileage, it means that the battery power is sufficient to support the range-extended electric vehicle to complete the remaining mileage of this trip; if the remaining mileage is greater than the remaining pure-electric mileage, it means that the battery power is not sufficient to support the range-extended electric vehicle to complete the remaining mileage of this trip. In this case, a scheme needs to be designed to control the power generation of the range extender of the range-extended electric vehicle and increase the endurance of the range-extended electric vehicle. The embodiments of this application are designed to provide a scheme for controlling the power generation of the range extender based on the accessory energy consumption and the remaining time for this situation.

[0048] In addition, the end point of the user's navigation is not necessarily their destination. It is very likely that the user will continue to drive the vehicle after arriving at the navigation location. To identify this situation and handle it reasonably, after the user ends the navigation, if the user continues to drive, calculate the driving distance that the user continues to drive after ending the navigation. If this driving distance is greater than the threshold, it is considered that the user has a need to continue driving, and the range extender will be immediately started for power generation. The power generation power (the power generation power at this time is the third power generation power) is jointly determined by the accessory power (the accessory power determines the total accessory energy consumption) and the driving demand power (the driving demand power determines the vehicle energy consumption). At the same time, a certain amount of additional electricity will be generated to charge the battery pack.

[0049] Further, calculate the total accessory energy consumption corresponding to multiple accessories started on the range extender electric vehicle during the remaining mileage, including: determining the first energy consumption of each accessory started on the range extender electric vehicle during the mileage already traveled in this trip; calculating the value of the first energy consumption of each accessory divided by the mileage already traveled and then multiplied by the remaining mileage, and taking this value as the second energy consumption of each accessory during the remaining mileage; taking the sum of the second energy consumptions of all accessories as the total accessory energy consumption.

[0050] Calculate the second energy consumption of each accessory through the following formula:

[0051] W4 = W3 / S 已 * S 剩

[0052] W4 is the second energy consumption of the accessory, W3 is the first energy consumption of the accessory, S 已 is the mileage already traveled, S 剩 is the remaining mileage.

[0053] Further, calculate the total accessory energy consumption corresponding to multiple accessories started on the range extender electric vehicle during the remaining mileage, including: determining the first energy consumption of each accessory started on the range extender electric vehicle during the time already used in this trip; calculating the value of the first energy consumption of each accessory divided by the time already used and then multiplied by the remaining time, and taking this value as the second energy consumption of each accessory during the remaining mileage; taking the sum of the second energy consumptions of all accessories as the total accessory energy consumption.

[0054] Calculate the second energy consumption of each accessory through the following formula:

[0055] W4 = W3 / T 已 * T 剩

[0056] W4 is the second energy consumption of the accessory, W3 is the first energy consumption of the accessory, T 已 is the time already used, T 剩 is the remaining time.

[0057] Take the sum of all W4 as W6, and W6 represents the total accessory energy consumption.

[0058] If the vehicle encounters a serious traffic jam during driving, it will cause the remaining mileage and the remaining time not to have a linear correspondence, and the total accessory energy consumption calculated by the above two embodiments will differ greatly; however, in the case of no particularly serious traffic jam, the total accessory energy consumption calculated by the above two embodiments will not differ much. The larger value of the total accessory energy consumption calculated by the above two embodiments can be selected to participate in the subsequent calculation, so as to obtain a more secure result.

[0059] Calculate the third power generation power through the following formula:

[0060] P3 = (W5 + W6) * T剩

[0061] P3 is the third power generation power, W5 is the vehicle energy consumption, and W6 is the total accessory energy consumption.

[0062] The third power generation power is calculated by the following formula:

[0063] P3 = (W5 + W6 + W7) * T 剩

[0064] W7 is the preset energy consumption.

[0065] Further, after determining the pure electric driving range, the method further includes: obtaining the working power of a plurality of accessories started on the range extender electric vehicle during this trip; multiplying the sum of the working powers of the plurality of accessories by the total time to obtain the total accessory power generation corresponding to the plurality of accessories; and updating the pure electric driving range by using the total accessory power generation.

[0066] The pure electric driving range in the above text is the total distance traveled by the range extender electric vehicle relying only on the battery power without starting the range extender and without starting the accessories. The pure electric driving range updated by using the total accessory power generation is the total distance traveled by the range extender electric vehicle relying only on the battery power without starting the range extender and with starting the accessories.

[0067] All the above optional technical solutions can be combined arbitrarily to form the optional embodiments of the present application, which will not be elaborated one by one here.

[0068] The following is the device embodiment of the present application, which can be used to execute the method embodiment of the present application. For the details not disclosed in the device embodiment of the present application, please refer to the method embodiment of the present application.

[0069] Figure 3 It is a schematic diagram of a range extender control device based on driving range provided by an embodiment of the present application. As Figure 3 shown, the range extender control device based on driving range includes:

[0070] A first determination module 301, configured to determine the total mileage and total time of this trip and the pure electric driving range of the range extender electric vehicle;

[0071] A first calculation module 302, configured to, when the total mileage is greater than the pure electric driving range: calculate the total power generation of the range extender of the range extender electric vehicle during this trip according to the difference between the total mileage and the pure electric driving range;

[0072] A division module 303, configured to obtain the road condition information of this trip and divide the total mileage into a congested mileage and an unobstructed mileage according to the road condition information;

[0073] A second calculation module 304, configured to calculate the unobstructed ratio and the congested ratio based on the total mileage, the congested mileage, and the unobstructed mileage;

[0074] The second determination module 305 is configured to determine a first power generation weight of the unobstructed mileage based on the unobstructed ratio, and determine a second power generation weight of the congested mileage based on the first power generation weight;

[0075] The third calculation module 306 is configured to calculate a first power generation amount of the unobstructed mileage and a second power generation amount of the congested mileage according to the total power generation amount, the first power generation weight, and the second power generation weight;

[0076] The fourth calculation module 307 is configured to calculate a first power generation power of the unobstructed mileage and a second power generation power of the congested mileage according to the first power generation amount, the second power generation amount, the unobstructed ratio, the congested ratio, and the total time;

[0077] The control module 308 is configured to control the range extender of the range-extended electric vehicle to generate power according to the first power generation power in the unobstructed mileage, and control the range extender of the range-extended electric vehicle to generate power according to the second power generation power in the congested mileage.

[0078] According to the technical solution provided by the embodiment of the present application, determine the total mileage and total time of this trip and the pure electric mileage of the range-extended electric vehicle; when the total mileage is greater than the pure electric mileage: calculate the total power generation amount of the range extender of the range-extended electric vehicle in this trip according to the difference between the total mileage and the pure electric mileage; obtain the road condition information of this trip, and divide the total mileage into congested mileage and unobstructed mileage according to the road condition information; calculate the unobstructed ratio and the congested ratio based on the total mileage, the congested mileage, and the unobstructed mileage; determine the first power generation weight of the unobstructed mileage based on the unobstructed ratio, and determine the second power generation weight of the congested mileage based on the first power generation weight; calculate the first power generation amount of the unobstructed mileage and the second power generation amount of the congested mileage according to the total power generation amount, the first power generation weight, and the second power generation weight; calculate the first power generation power of the unobstructed mileage and the second power generation power of the congested mileage according to the first power generation amount, the second power generation amount, the unobstructed ratio, the congested ratio, and the total time; in the unobstructed mileage, control the range extender of the range-extended electric vehicle to generate power according to the first power generation power, and in the congested mileage, control the range extender of the range-extended electric vehicle to generate power according to the second power generation power. By adopting the above technical means, it is possible to solve the problem in the prior art that in the control of the range extender of the range-extended electric vehicle, due to the failure to consider different road sections of the driving mileage, the control efficiency of the range extender is low, thereby improving the control efficiency of the range extender of the range-extended electric vehicle, reducing emissions and vehicle use costs, and improving the vehicle use experience of users.

[0079] Optionally, the second calculation module 304 is further configured to calculate the unobstructed ratio, the congested ratio, the first power generation weight, and the second power generation weight through the following formulas:

[0080] R 拥堵 =S 拥堵 / S 总

[0081] R 畅通 = S 畅通 / S 总

[0082] W1 = U1 * W 总

[0083] W2 = U2 * W 总

[0084] Wherein, R 拥堵 is the congestion ratio, S 拥堵 is the congestion mileage, S 总 is the total mileage, R 畅通 is the unobstructed ratio, S 畅通 is the unobstructed mileage, W1 is the first power generation amount, U1 is the first power generation weight, W 总 is the total power generation amount, W2 is the second power generation amount, U2 is the second power generation weight.

[0085] Optionally, the third calculation module 306 is further configured to calculate the first power generation power and the second power generation power through the following formula:

[0086] P1 = W1 / (R 畅通 * T 总 )

[0087] P2 = W2 / (R 拥堵 * T 总 )

[0088] Wherein, P1 is the first power generation power, W1 is the first power generation amount, R 畅通 is the unobstructed ratio, T 总 is the total time, P2 is the second power generation power, W2 is the second power generation amount, R 拥堵 is the congestion ratio.

[0089] Optionally, the fourth calculation module 307 is further configured to obtain the working powers of a plurality of accessories started on the range extender electric vehicle during this trip; multiply the sum of the working powers of the plurality of accessories by the total time to obtain the total accessory power generation amount corresponding to the plurality of accessories; update the total power generation amount by using the total accessory power generation amount, and update the first power generation power and the second power generation power according to the updated total power generation amount.

[0090] Optionally, the first determination module 301 is further configured to: when the total mileage is less than or equal to the pure electric mileage, control the range extender electric vehicle to travel without starting the range extender, and when the battery power of the range extender electric vehicle drops to a preset threshold, determine the remaining mileage and remaining time of this trip and the remaining pure electric mileage of the range extender electric vehicle; when the remaining mileage is greater than the remaining pure electric mileage, calculate the vehicle energy consumption and total accessory energy consumption corresponding to the range extender electric vehicle and multiple accessories started on the range extender electric vehicle respectively during the remaining mileage; calculate the third power generation power according to the vehicle energy consumption, total accessory energy consumption and remaining time; when the battery power of the range extender electric vehicle drops to a preset threshold, start and control the range extender to generate electricity according to the third power generation power.

[0091] Optionally, the first determination module 301 is further configured to determine the first energy consumption of each accessory started on the range extender electric vehicle during the mileage already traveled in this trip; calculate the value of the first energy consumption of each accessory divided by the mileage already traveled and then multiplied by the remaining mileage, and use this value as the second energy consumption of each accessory during the remaining mileage; use the sum of the second energy consumptions of all accessories as the total accessory energy consumption.

[0092] Optionally, the first determination module 301 is further configured to calculate the second energy consumption of each accessory through the following formula:

[0093] W4 = W3 / S 已 *S 剩

[0094] W4 is the second energy consumption of the accessory, W3 is the first energy consumption of the accessory, S 已 is the mileage already traveled, S 剩 is the remaining mileage.

[0095] Optionally, the first determination module 301 is further configured to determine the first energy consumption of each accessory started on the range extender electric vehicle during the time already used in this trip; calculate the value of the first energy consumption of each accessory divided by the time already used and then multiplied by the remaining time, and use this value as the second energy consumption of each accessory during the remaining mileage; use the sum of the second energy consumptions of all accessories as the total accessory energy consumption.

[0096] Optionally, the first determination module 301 is further configured to calculate the second energy consumption of each accessory through the following formula:

[0097] W4 = W3 / T 已 *T 剩

[0098] W4 is the second energy consumption of the accessory, W3 is the first energy consumption of the accessory, T 已 is the time already used, T 剩 is the remaining time.

[0099] Optionally, the first determination module 301 is further configured to calculate the third power generation power through the following formula:

[0100] P3 = (W5 + W6) * T 剩

[0101] P3 is the third power generation power, W5 is the vehicle energy consumption, and W6 is the total accessory energy consumption.

[0102] Optionally, the first determination module 301 is further configured to calculate the third power generation power through the following formula:

[0103] P3 = (W5 + W6 + W7) * T 剩

[0104] W7 is the preset energy consumption.

[0105] Optionally, the first determination module 301 is further configured to obtain the working powers of a plurality of accessories started on the range-extended electric vehicle during this trip; multiply the sum of the working powers of the plurality of accessories by the total time to obtain the total accessory power generation corresponding to the plurality of accessories; and update the pure electric mileage using the total accessory power generation.

[0106] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution is prior or posterior. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0107] Figure 4 is a schematic diagram of the range-extended electric vehicle 4 provided by the embodiments of the present disclosure. As Figure 4 shown, the range-extended electric vehicle 4 of this embodiment includes: a main control module 401, a memory 402, and a computer program 403 stored in the memory 402 and operable on the main control module 401. When the main control module 401 executes the computer program 403, the steps in the above method embodiments are implemented. Alternatively, when the main control module 401 executes the computer program 403, the functions of each module / unit in the above device embodiments are implemented.

[0108] The range-extended electric vehicle 4 may include but is not limited to the main control module 401 and the memory 402. Those skilled in the art can understand that Figure 4 is merely an example of the range-extended electric vehicle 4, and does not constitute a limitation to the range-extended electric vehicle 4. It may include more or fewer components than shown, or different components.

[0109] The main control module 601 can be a VCU (Vehicle Control Unit), and the memory 402 can be an internal storage unit of the range-extended electric vehicle 4. For example, it can be the hard disk or memory of the range-extended electric vehicle 4. The memory 402 can also be an external storage device of the range-extended electric vehicle 4, such as a plug-in hard disk equipped on the range-extended electric vehicle 4, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. The memory 402 can also include both the internal storage unit and the external storage device of the range-extended electric vehicle 4. The memory 402 is used to store computer programs and other programs and data required by the range-extended electric vehicle.

[0110] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0111] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above embodiment methods of the present application, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the main control module, the steps of the above various method embodiments can be implemented. The computer program can include computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0112] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A control method for a range extender based on driving mileage, characterized in that, Including: Determine the total mileage and total time of this trip and the pure electric mileage of the range-extended electric vehicle; When the total mileage is greater than the pure electric mileage: Calculate the total power generation of the range extender of the range-extended electric vehicle during this trip based on the difference between the total mileage and the pure electric mileage; Obtain the road condition information of this trip, and divide the total mileage into congested mileage and unobstructed mileage according to the road condition information; Calculate the unobstructed ratio and the congested ratio based on the total mileage, the congested mileage and the unobstructed mileage; Determine the first power generation weight of the unobstructed mileage based on the unobstructed ratio, and determine the second power generation weight of the congested mileage based on the first power generation weight; Calculate the first power generation amount of the unobstructed mileage and the second power generation amount of the congested mileage according to the total power generation amount, the first power generation weight and the second power generation weight; Calculate the first power generation power of the unobstructed mileage and the second power generation power of the congested mileage according to the first power generation amount, the second power generation amount, the unobstructed ratio, the congested ratio and the total time; In the unobstructed mileage, control the range extender of the range-extended electric vehicle to generate power according to the first power generation power, and in the congested mileage, control the range extender of the range-extended electric vehicle to generate power according to the second power generation power.

2. The method according to claim 1, characterized in that, Calculate the unobstructed ratio, the congested ratio, the first power generation weight and the second power generation weight through the following formula: Rcongested = Scongested / Stotal Runobstructed = Sunobstructed / Stotal W1 = U1 * W 总 W2 = U2 * W 总 Among them, R 拥堵 is the congestion ratio, S 拥堵 is the congested mileage, S 总 is the total mileage, R 畅通 is the unobstructed ratio, S 畅通 is the unobstructed mileage, W1 is the first power generation amount, U1 is the first power generation weight, W 总 is the total power generation amount, W2 is the second power generation amount, and U2 is the second power generation weight.

3. The method according to claim 1, wherein Calculate the first power generation power and the second power generation power through the following formula: P1 = W1 / (R 畅通 *T 总 ) P2 = W2 / (R 拥堵 *T 总 ) Among them, P1 is the first power generation power, W1 is the first power generation amount, R 畅通 is the smooth proportion, T 总 is the total time, P2 is the second power generation power, W2 is the second power generation amount, R 拥堵 is the congestion proportion.

4. The method according to claim 1, characterized in that, After calculating the first power generation power of the unobstructed mileage and the second power generation power of the congested mileage according to the first power generation amount, the second power generation amount, the unobstructed ratio, the congested ratio and the total time, the method further includes: Obtain the working power of multiple accessories started on the range-extended electric vehicle during this trip; Multiply the sum of the working powers of multiple accessories by the total time to obtain the total accessory power generation amount corresponding to the multiple accessories; Update the total power generation amount by using the total accessory power generation amount, and update the first power generation power and the second power generation power according to the updated total power generation amount.

5. The method according to claim 1, characterized in that, When the total mileage is less than or equal to the pure electric mileage, it includes: Control the range-extended electric vehicle to drive without starting the range extender. When the power of the range-extended electric vehicle drops to a preset threshold, determine the remaining mileage and remaining time of this trip and the remaining pure electric mileage of the range-extended electric vehicle; When the remaining mileage is greater than the remaining pure electric mileage: Calculate the vehicle energy consumption and the total accessory energy consumption corresponding to the range-extended electric vehicle and multiple accessories started on the range-extended electric vehicle respectively during the remaining mileage; Calculate the third power generation power according to the vehicle energy consumption, the total accessory energy consumption and the remaining time; When the power of the range-extended electric vehicle drops to the preset threshold, start and control the range extender to generate power according to the third power generation power.

6. The method according to claim 5, wherein Calculating the total accessory energy consumption corresponding to multiple accessories started on the range-extended electric vehicle during the remaining mileage includes: Determine the first energy consumption of each activated accessory on the range-extended electric vehicle during the current trip in the mileage traveled during the current trip; Calculate the value obtained by dividing the first energy consumption of each accessory by the mileage traveled and then multiplying by the remaining mileage, and use this value as the second energy consumption of each accessory during the remaining mileage; Take the sum of the second energy consumptions of all accessories as the total accessory energy consumption.

7. The method according to claim 5, characterized in that, Calculate the total accessory energy consumption corresponding to multiple activated accessories on the range-extended electric vehicle during the remaining mileage, including: Determine the first energy consumption of each activated accessory on the range-extended electric vehicle during the time used in the current trip; Calculate the value obtained by dividing the first energy consumption of each accessory by the time used and then multiplying by the remaining time, and use this value as the second energy consumption of each accessory during the remaining mileage; Take the sum of the second energy consumptions of all accessories as the total accessory energy consumption.

8. The method according to claim 1, wherein After determining the pure electric mileage, the method further includes: Obtain the working power of multiple activated accessories on the range-extended electric vehicle during the current trip; Multiply the sum of the working powers of multiple accessories by the total time to obtain the total accessory power generation corresponding to multiple accessories; Update the pure electric mileage using the total accessory power generation.

9. An extender control device based on driving mileage, characterized in that Including: A first determination module configured to determine the total mileage and total time of the current trip and the pure electric mileage of the range-extended electric vehicle; A first calculation module configured to, when the total mileage is greater than the pure electric mileage: calculate the total power generation of the range extender of the range-extended electric vehicle during the current trip based on the difference between the total mileage and the pure electric mileage; A division module configured to obtain the road condition information of the current trip and divide the total mileage into a congested mileage and an unobstructed mileage according to the road condition information; A second calculation module configured to calculate the unobstructed ratio and the congested ratio based on the total mileage, the congested mileage, and the unobstructed mileage; A second determination module configured to determine a first power generation weight for the unobstructed mileage based on the unobstructed ratio, and determine a second power generation weight for the congested mileage based on the first power generation weight; A third calculation module configured to calculate the first power generation of the unobstructed mileage and the second power generation of the congested mileage according to the total power generation, the first power generation weight, and the second power generation weight; A fourth calculation module configured to calculate the first power generation power of the unobstructed mileage and the second power generation power of the congested mileage according to the first power generation, the second power generation, the unobstructed ratio, the congested ratio, and the total time; A control module configured to, during the unobstructed mileage, control the range extender of the range-extended electric vehicle to generate power according to the first power generation power, and during the congested mileage, control the range extender of the range-extended electric vehicle to generate power according to the second power generation power.

10. An extended-range electric vehicle, characterized in that, Including a memory, a main control module, and a computer program stored in the memory and executable on the main control module, and when the main control module executes the computer program, it implements the range extender control method based on driving mileage according to any one of claims 1 to 8.

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