Method, apparatus and electronic device for constructing pure electric utilization coefficient based on energy transmission

Abstract

The present invention relates to the technical field of transportation, and particularly to a method, device and electronic device for constructing a pure electric utilization coefficient based on energy transmission. The method includes: dividing effective travel information into multiple trips with reference to the endurance mileage label of a hybrid vehicle; calculating the motor drive energy ratio of each trip according to the transient parameter information corresponding to each trip, and performing weighted averaging on the motor drive energy ratios of each trip under each endurance mileage label to obtain the comprehensive motor drive energy ratio corresponding to each endurance mileage label; fitting the comprehensive motor drive energy ratio corresponding to each endurance mileage label to obtain the pure electric utilization coefficient of the hybrid vehicle. Thus, the problem in the related art that the method of calculating the pure electric utilization coefficient based on the mileage ratio ignores the possible fuel participation in actual operation, resulting in inaccurate calculation results and being unable to truly reflect the electric energy contribution rate during the user's vehicle use process is solved.

Description

Technical Field

[0001] The present invention relates to the field of transportation technology, and in particular to a method, device and electronic equipment for constructing a pure electric utilization coefficient based on energy transmission. Background Art

[0002] As the global demand for energy conservation and emission reduction grows, hybrid vehicles have attracted widespread attention due to their ability to reduce tail gas emissions and improve fuel economy. For such vehicles, it is crucial to accurately assess their electric energy usage, and the pure electric utilization factor is an important indicator.

[0003] The pure electric utilization coefficient in the relevant technology is calculated by counting the daily travel mileage of residents or the travel chain mileage between two charges, and from the perspective of mileage ratio, that is, the ratio of the mileage in the power consumption mode to the total mileage. However, the relevant technology fails to fully take into account the complex working conditions that may exist in the actual driving process. For example, when the actual power is sufficient but the power demand is large, the system may start the internal combustion engine to meet the additional power demand or charge the battery pack. In this case, although the vehicle is still in the so-called "power consumption mode", fuel has actually been introduced as additional energy input. Therefore, the method based on mileage ratio in the relevant technology may cause the calculated pure electric utilization coefficient to be too high, and it cannot truly reflect the contribution rate of electric energy during the user's use of the vehicle. Summary of the invention

[0004] The present invention provides a method, device and electronic device for constructing a pure electric utilization coefficient based on energy transmission, so as to solve the problem that the method of calculating the pure electric utilization coefficient based on mileage ratio in the related art ignores the fuel participation that may occur in actual operation, resulting in the calculation result being not accurate enough and unable to truly reflect the electric energy contribution rate during the user's use of the vehicle.

[0005] The first aspect of the present invention provides a method for constructing a pure electric utilization coefficient based on energy transmission, comprising the following steps: dividing the effective trip information into multiple trips with reference to the range tag of the hybrid vehicle, and constructing a trip data set in the time sequence of the multiple trips, wherein the trip data set includes multiple trips and transient parameter information corresponding to each trip; calculating the motor drive energy ratio of each trip according to the transient parameter information corresponding to each trip, and performing weighted averaging on the motor drive energy ratio of each trip under each range tag to obtain the comprehensive motor drive energy ratio corresponding to each range tag; and fitting the comprehensive motor drive energy ratio corresponding to each range tag to obtain the pure electric utilization coefficient of the hybrid vehicle.

[0006] Optionally, calculate the motor drive energy ratio for each trip according to the transient parameter information corresponding to each trip, including: calculating the motor output energy and the engine output energy respectively according to the transient parameter information corresponding to each trip; calculating the motor drive energy ratio corresponding to each trip according to the motor output energy and the engine output energy.

[0007] Optionally, the calculation formula for the motor drive energy ratio is:

[0008]

[0009] where, is the label at the total duration of the th trip, represents the transmission efficiency between the power battery and the motor, represents the thermal efficiency of the engine, represents the instantaneous output power of the motor at the moment, represents the instantaneous output power of the engine at the

[0010] Optionally, perform a weighted average on the motor drive energy ratio of each trip under each driving range label to obtain the comprehensive motor drive energy ratio corresponding to each driving range label, including: calculating the weight value of each trip under each driving range label respectively; calculating the energy flow transmission and conversion ratio of each trip under each driving range label according to the weight value of each trip under each driving range label and the motor drive energy ratio corresponding to each trip; averaging the energy flow transmission and conversion ratio of each trip to obtain the comprehensive motor drive energy ratio corresponding to each driving range label.

[0011] Optionally, the calculation formula for the weight value of each trip is:

[0012]

[0013] where, represents the weight of the th trip, represents the driving mileage of the th trip.

[0014] Optionally, if the increase in the SOC (State of Charge) of the hybrid vehicle from one power-off to the next power-on exceeds the preset value, it is determined as a charging, and one trip is between two chargings.

[0015] Optionally, fitting the comprehensive motor drive energy ratio corresponding to each driving range label to obtain the pure electric utilization coefficient of the hybrid vehicle includes: fitting the comprehensive motor drive energy ratio corresponding to each driving range label using an exponential polynomial with constraints; generating the pure electric utilization coefficient of the hybrid vehicle according to the fitting result.

[0016] An embodiment of the second aspect of the present invention provides a device for constructing a pure electric utilization coefficient based on energy transmission, including: a division module for dividing the effective travel information into multiple trips with reference to the driving range labels of the hybrid vehicle and constructing a trip data set in the chronological order of the multiple trips, where the trip data set includes multiple trips and the transient parameter information corresponding to each trip; a calculation module for calculating the motor drive energy ratio of each trip according to the transient parameter information corresponding to each trip, and performing weighted averaging on the motor drive energy ratios of each trip under each driving range label to obtain the comprehensive motor drive energy ratio corresponding to each driving range label; a fitting module for fitting the comprehensive motor drive energy ratio corresponding to each driving range label to obtain the pure electric utilization coefficient of the hybrid vehicle.

[0017] Optionally, the calculation module is further configured to calculate the motor output energy and the engine output energy respectively according to the transient parameter information corresponding to each trip; calculate the motor drive energy ratio corresponding to each trip according to the motor output energy and the engine output energy.

[0018] Optionally, the calculation formula for the motor drive energy ratio is:

[0019]

[0020] where is the total duration of the th trip under the label , represents the transmission efficiency between the power battery and the motor, represents the thermal efficiency of the engine, represents the instantaneous output power of the motor at time represents the instantaneous output power of the engine at time

[0021] Optionally, the calculation module is further configured to: calculate the weight value of each trip under each driving range label respectively; calculate the energy flow transmission conversion ratio of each trip under each driving range label according to the weight value of each trip under each driving range label and the motor drive energy ratio corresponding to each trip; average the energy flow transmission conversion ratio of each trip to obtain the comprehensive motor drive energy ratio corresponding to each driving range label.

[0022] Optionally, the calculation formula for the weight value of each trip is as follows:

[0023]

[0024] wherein, represents the weight of the th trip, represents the driving mileage of the th trip.

[0025] Optionally, if the increase in the SOC (State of Charge) of the battery of the hybrid vehicle from one power-off to the next power-on exceeds a preset value, it is determined as one charging, and one trip is between two chargings.

[0026] Optionally, the fitting module is further configured to use an exponential polynomial with constraint conditions to fit the comprehensive motor drive energy ratio corresponding to each endurance mileage label; and generate the pure electric utilization coefficient of the hybrid vehicle according to the fitting result.

[0027] An embodiment of the third aspect of the present invention provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement the method for constructing the pure electric utilization coefficient based on energy transfer as described in the above embodiment.

[0028] An embodiment of the fourth aspect of the present invention provides a computer-readable storage medium, on which a computer program or instruction is stored, and when the computer program or instruction is executed, it is used to implement the method for constructing the pure electric utilization coefficient based on energy transfer as described in the above embodiment.

[0029] Thus, the present invention has at least the following beneficial effects:

[0030] By dividing the trip data of the hybrid vehicle in the embodiment of the present invention, each trip can be analyzed separately, so as to realize the refined management of the vehicle performance. Starting from the perspective of the vehicle's overall energy flow transmission, the corresponding motor drive energy ratio is calculated by combining the transient parameter data associated with each trip, and the motor drive energy ratio of each trip under each endurance mileage label is weighted and averaged, thereby obtaining the pure electric utilization coefficient of the hybrid vehicle, making the calculation result closer to the actual situation and more accurately reflecting the electric energy usage of the hybrid vehicle during actual driving.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, wherein:

[0033] Figure 1 A flowchart of a method for constructing a pure - electric utilization coefficient based on energy transfer according to an embodiment of the present invention;

[0034] Figure 2 An example diagram of energy transfer according to an embodiment of the present invention;

[0035] Figure 3 An example diagram of a method for constructing a pure - electric utilization coefficient for energy - flow transfer and conversion according to an embodiment of the present invention;

[0036] Figure 4 An example diagram of travel division and calculation of motor - drive energy ratio according to an embodiment of the present invention;

[0037] Figure 5 An example diagram of the motor - drive energy ratio for each travel under each endurance - mileage label according to an embodiment of the present invention;

[0038] Figure 6 An example diagram of the comprehensive motor - drive energy ratio corresponding to each endurance - mileage label according to an embodiment of the present invention;

[0039] Figure 7 A curve diagram of endurance - mileage label and pure - electric utilization coefficient according to an embodiment of the present invention;

[0040] Figure 8 A block diagram of a device for constructing a pure - electric utilization coefficient based on energy transfer according to an embodiment of the present invention;

[0041] Figure 9 A schematic structural diagram of an electronic device according to an embodiment of the present invention. Detailed implementation manners

[0042] The embodiments of the present invention are described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0043] The method, device and electronic device for constructing the pure - electric utilization coefficient based on energy transmission according to the embodiments of the present invention will be described below with reference to the accompanying drawings. Aiming at the problems mentioned in the above - mentioned background technology, the present invention provides a method for constructing the pure - electric utilization coefficient. In this method, by dividing the travel data of a hybrid vehicle, each travel can be analyzed separately, so as to realize the refined management of vehicle performance. From the perspective of the overall vehicle energy - flow transmission, the corresponding motor - drive energy ratio is calculated by combining the transient parameter data associated with each travel, and the motor - drive energy ratios of each travel under each cruising - range label are weighted and averaged, thereby obtaining the pure - electric utilization coefficient of the hybrid vehicle, making the calculation result closer to the actual situation and more accurately reflecting the electric - energy usage of the hybrid vehicle during actual driving. Thus, the problem in the related technology that the method of calculating the pure - electric utilization coefficient based on the mileage ratio ignores the possible fuel - participation situation in actual operation, resulting in an inaccurate calculation result and being unable to truly reflect the electric - energy contribution rate during the user's vehicle - using process is solved.

[0044] Specifically, Figure 1 FIG. is a schematic flowchart of a method for constructing a pure - electric utilization coefficient based on energy transmission according to an embodiment of the present invention.

[0045] As Figure 1 shown, the method for constructing the pure - electric utilization coefficient based on energy transmission includes the following steps:

[0046] In step S101, the effective travel information is divided into multiple travels with reference to the cruising - range label of the hybrid vehicle, and a travel data set is constructed in the time sequence of the multiple travels, where the travel data set includes multiple travels and the transient parameter information corresponding to each travel.

[0047] Among them, the cruising - range label represents the pure - electric cruising range of the hybrid vehicle, and the transient parameter information includes cumulative mileage, motor torque, motor speed, engine torque, engine speed, SOC, etc.; the effective travel information is travel information with a travel mileage greater than a preset value, and the preset value can be set to 1 km.

[0048] Embodiments of the present invention can collect driving data from hybrid vehicles with different cruising - range label values. Embodiments of the present invention can use an on - vehicle diagnostic system or other monitoring devices to record various transient parameter information and travel information of hybrid vehicles during actual use.

[0049] Further, in the embodiments of the present invention, the travel is reasonably divided, and the obtained transient parameters are associated with each travel. Specifically, taking one charging event as the dividing point of the travel, if the increase in SOC from one power-off to the next power-on of the vehicle exceeds a preset threshold (such as 10%), one charging is determined, and a complete travel is between two chargings. Based on this definition, calculate the difference between each travel and the cumulative mileage at the end of the previous travel, so as to determine the actual driving mileage R of this travel. Delete the travels with a travel mileage less than 1 km. Thus, the embodiments of the present invention obtain effective travel information by removing those short trips that do not meet the conditions to ensure the accuracy of subsequent calculation results.

[0050] Further, based on the effective travel information obtained from the above embodiments, the embodiments of the present invention can use the endurance mileage label i of the hybrid vehicle as the basic unit, divide the effective travel information into multiple travels, and construct a travel data set for all travels of the hybrid vehicle in chronological order. Among them, the travel data set contains multiple travels and all associated transient parameter information (such as motor output power, engine output power, SOC change, etc.) within each travel.

[0051] In step S102, calculate the motor drive energy ratio of each travel according to the transient parameter information corresponding to each travel, and perform weighted average on the motor drive energy ratio of each travel under each endurance mileage label to obtain the comprehensive motor drive energy ratio corresponding to each endurance mileage label.

[0052] It can be understood that by calculating the motor drive energy ratio of each travel according to the transient parameter information corresponding to each travel, the embodiments of the present invention fully consider the engine thermal efficiency and the energy transmission efficiency from the battery to the motor, can more accurately reflect the electric energy usage efficiency of the vehicle under actual driving conditions, and avoid the problem that the pure electric utilization coefficient calculated in the traditional method is too high due to ignoring the start of the internal combustion engine when the actual power is sufficient but the required power is large.

[0053] In an embodiment of the present invention, calculating the motor drive energy ratio of each travel according to the transient parameter information corresponding to each travel includes: calculating the motor output energy and the engine output energy respectively according to the transient parameter information corresponding to each travel; calculating the motor drive energy ratio corresponding to each travel according to the motor output energy and the engine output energy.

[0054] Specifically, the hybrid vehicle uses the engine and the power battery as the energy sources, and the transient parameter information can only obtain the energy transmitted to the end of the energy flow. However, the embodiments of the present invention need to calculate the energy provided by the front-end sources, so the respective transmission efficiencies need to be considered, such as Figure 2As shown, the front-end energy provided by the engine is the engine output power divided by the engine thermal efficiency. The front-end energy provided by the battery is the motor output power divided by the electrical energy transmission efficiency from the battery to the motor.

[0055] In the embodiments of the present invention, the energy output by the motor in a single trip can be represented by EMDR (Electric Motor Drive Ratio), which is the ratio of the energy output by the motor to the energy provided by the engine and the power battery, and the calculation formula is:

[0056]

[0057] Wherein, is the label at the total duration of the th trip, represents the transmission efficiency between the power battery and the motor, represents the thermal efficiency of the engine, represents the instantaneous output power of the motor at the moment, represents the instantaneous output power of the engine at the

[0058] Wherein, for each time point in each trip , the instantaneous motor torque and the instantaneous motor speed are used to calculate the instantaneous output power of the motor:

[0059]

[0060] Wherein, for each time point in each trip , the instantaneous engine torque and the instantaneous engine speed are used to calculate the instantaneous output power of the engine:

[0061]

[0062] In the formula: represents the instantaneous torque of the motor at the moment, represents the instantaneous torque of the engine at the moment; represents the instantaneous speed of the motor at the moment, represents the instantaneous speed of the engine at the moment.

[0063] In an embodiment of the present invention, the weighted average of the motor drive energy ratios of each trip under each driving range label is calculated to obtain the comprehensive motor drive energy ratio corresponding to each driving range label, including: calculating the weight value of each trip under each driving range label respectively; calculating the energy flow transmission and conversion ratio of each trip under each driving range label according to the weight value of each trip under each driving range label and the motor drive energy ratio corresponding to each trip; averaging the energy flow transmission and conversion ratios of each trip to obtain the comprehensive motor drive energy ratio corresponding to each driving range label.

[0064] In the embodiment of the present invention, there are multiple trips under the same rated driving range label, so the same driving range label corresponds to multiple motor drive energy ratios. To obtain the comprehensive motor drive ratio of all trips under the same label theoretically, individual weights should be assigned to the motor drive energy ratios of each trip.

[0065] In the calculation of the motor drive energy ratio, each trip is divided based on charging, and each charging behavior is equal. This means that regardless of the trip length, each charging is considered equally important. However, from the perspective of energy utilization efficiency, the longer the trip mileage, the lower the mileage benefit obtained from this charging. Therefore, in the embodiment of the present invention, the weight of the trip should be inversely proportional to the trip mileage, that is, the longer the trip mileage, the smaller its weight. Such a weight distribution can more accurately reflect the contribution of different trips to the overall energy efficiency, thereby optimizing the calculation of the motor drive energy ratio.

[0066] Calculate the reciprocal of each trip mileage under the hybrid vehicle and perform a normalization process to represent that the calculation formula for the weight of each trip is as follows. The sum of the weights of all trips with label is 1.

[0067]

[0068] Wherein, represents the weight of the th trip, represents the th trip mileage.

[0069] Furthermore, in the embodiment of the present invention, the energy flow transmission and conversion ratio of each trip under each driving range label is calculated according to the weight value of each trip under each driving range label and the motor drive energy ratio corresponding to each trip, and the formula is .

[0070] Finally, to obtain the comprehensive motor drive energy ratio corresponding to each driving range label, the embodiments of the present invention need to average the energy flow transmission and conversion ratios of all trips under the same label to obtain the comprehensive motor drive energy ratio corresponding to each driving range label , which can accurately reflect the efficiency of electric energy use during the actual driving of the vehicle under different driving range labels. The formula is as follows:

[0071]

[0072] In step S103, the comprehensive motor drive energy ratio corresponding to each driving range label is fitted to obtain the pure electric utilization coefficient of the hybrid vehicle.

[0073] In some embodiments, fitting the comprehensive motor drive energy ratio corresponding to each driving range label to obtain the pure electric utilization coefficient of the hybrid vehicle includes: fitting the comprehensive motor drive energy ratio corresponding to each driving range label by using an exponential polynomial with constraint conditions; generating the pure electric utilization coefficient of the hybrid vehicle according to the fitting result.

[0074] It can be understood that the embodiments of the present invention can select an exponential polynomial with constraints as the fitting function. This function needs to satisfy the following two main constraint conditions:

[0075] Constraint condition 1: The expression of the exponential polynomial is:

[0076] Among them, the fitting parameters to be determined include , , not exceeding 10.

[0077] Constraint condition 2: It is required that the curve corresponding to the expression of the fitted exponential polynomial maintains a monotonically increasing property throughout the domain, and when = 0, = 0; = When, = 1.

[0078] The embodiments of the present invention determine the pure electric utilization coefficient under any driving range label by fitting the comprehensive motor drive energy ratio corresponding to each driving range label with the above exponential polynomial with constraint conditions. Thus, from the perspective of energy, it accurately describes the electric energy use situation during the actual driving of the vehicle, providing a new perspective for the energy efficiency evaluation of hybrid vehicles.

[0079] The method for constructing the pure electric utilization coefficient based on energy transfer according to the embodiments of the present invention divides the travel data of a hybrid vehicle, enabling each section of the travel to be analyzed separately, thereby achieving refined management of vehicle performance. From the perspective of the overall vehicle energy flow transmission, the corresponding motor drive energy ratio is calculated by combining the transient parameter data associated with each travel. The motor drive energy ratios of each travel under each cruising range label are weighted and averaged, and then the pure electric utilization coefficient of the hybrid vehicle is obtained, making the calculation result closer to the actual situation and more accurately reflecting the electric energy usage of the hybrid vehicle during actual driving. Thus, it solves the problem that in the related art, the method of calculating the pure electric utilization coefficient based on the mileage ratio ignores the possible fuel participation in actual operation, resulting in inaccurate calculation results and being unable to truly reflect the electric energy contribution rate of the user during the vehicle usage process.

[0080] In summary, from the overall vehicle energy flow transmission process, from the perspective of energy, that is, the ratio of the electric energy output by the motor to the total energy output by the engine and the battery, the embodiments of the present invention propose a new method for calculating the pure electric utilization coefficient. The aim is to accurately describe the electric energy usage of the vehicle during actual driving from a new perspective. This method not only enriches the current calculation means of the pure electric utilization coefficient but also provides a new perspective for the energy efficiency evaluation of hybrid vehicles, promoting technological innovation and development. The following details the method for constructing the pure electric utilization coefficient based on energy transfer according to the embodiments of the present invention with a specific example, as Figure 3 shown as follows:

[0081] Step 1: The on-vehicle device monitors and records the usage data of actual vehicle users, including transient parameters such as cumulative mileage, motor torque, motor speed, engine torque, engine speed, and SOC. Specifically, in the embodiments of the present invention, 300 hybrid vehicles with rated cruising range label values of 48 - 235 km are randomly selected, including sedan, SUV, and MPV models. The cruising range label values i include 48, 55, 120, and 235 respectively, and the on-vehicle device monitors and records the usage data of actual vehicle users, including transient parameters such as cumulative mileage, motor torque, motor speed, engine torque, engine speed, and SOC. Part of the data for Travel 1 is shown in Table 1 below.

[0082] Table 1

[0083]

[0084] Step 2: Travel division. If the SOC increase value from one power-off to the next power-on of the vehicle exceeds 10, determine one charging, and the period between two chargings is one travel. Based on this definition, as Figure 4As shown, calculate the difference between each trip and the cumulative mileage at the end of the previous trip to determine the actual driving mileage R of this trip. Delete trips with a trip mileage less than 1 km. In the sample, the driving mileage of trip 1 is 34 km. A total of 7964 trips are obtained. Based on the obtained valid trip information, using the endurance mileage label value i as the basic unit, construct 4 groups of trip datasets in chronological order , , , , including 252 trips, including 756 trips, including 6427 trips, including 529 trips. Each trip information contains all transient parameter information within the trip and the cumulative mileage of the trip.

[0085] Step 3: Calculate the motor drive energy ratio for each trip through the motor output power and the engine output power, and considering the engine thermal efficiency and energy transmission efficiency, as Figure 5 shown by the multiple scatter points in, the calculation formula is:

[0086]

[0087] represents the transmission efficiency from the power battery output to the motor output, taking an average value of 0.8; represents the engine thermal efficiency, taking an average value of 0.4.

[0088] Label value = 48 for 252 trips of = [1, 0.8, 0.7, 0.5,..., 1];

[0089] Label value = 55 for 756 trips of = [0.7, 0.9, 0.3, 0.4,..., 1];

[0090] Label value = 120 for 6427 trips of = [1, 1, 1, 0.3,..., 0.9];

[0091] Label value = 235 for 529 trips of = [1, 1, 1, 0.5,..., 0.3].

[0092] Calculate the reciprocal of each trip mileage under each label and standardize it.

[0093] Label value = Weight of 252 trips with a value of 48, = [0.00381921, 0.00373562, 0.00367253, 0.00369563, ..., 0.00381465], and the sum of all values is 1;

[0094] Label value = Weight of 756 trips with a value of 55 = [0.00133456, 0.00136487, 0.00103209, 0.00113633, ..., 00139343], and the sum of all values is 1;

[0095] Label value = Weight of 6427 trips with a value of 120 = [0.000153343, 0.000159241, 0.000159987, 0.000138574, ..., 0.000158764], and the sum of all values is 1;

[0096] Label value = Weight of 529 trips with a value of 235 = [0.0018903, 0.0019544, 0.0017364, 0.00125433, ..., 0.00088463], and the sum of all values is 1;

[0097] Step 4: By taking the weighted average of the motor drive energy ratios for each trip under each driving range label, obtain the comprehensive motor drive energy ratio corresponding to each driving range label , as Figure 6 shown.

[0098] The calculated label value = Comprehensive motor drive energy ratio with a value of 48 is 0.3701,

[0099] The calculated label value = Comprehensive motor drive energy ratio with a value of 55 is 0.4070,

[0100] The calculated label value = Comprehensive motor drive energy ratio with a value of 120 is 0.6279,

[0101] The calculated label value = Comprehensive motor drive energy ratio with a value of 235 is 0.7867.

[0102] Step 5: Obtain the pure - electric driving range label and the comprehensive motor - drive energy proportion distribution, and obtain the general expression of the pure - electric utilization coefficient curve through constrained exponential fitting. Specifically, in the embodiment of the present invention, based on the comprehensive motor - drive energy proportion distribution, each label can be fitted through constrained exponential polynomial fitting of the comprehensive motor - drive energy proportion for calculating the test - chamber test results.

[0103] The following two constraint conditions should be satisfied:

[0104] Constraint condition 1: The structure of the curve expression is: .

[0105] The fitting parameters to be determined include , , not exceeding 10.

[0106] Constraint condition 2: It is required that the fitted curve maintains the property of being monotonically increasing within the entire domain, and when = 0, = 0; = when, = 1.

[0107] Therefore, in the embodiment of the present invention, the fitting parameters can be calculated by combining the above - mentioned data to obtain being 1500, being 15, being - 14, being - 636, being 5954, being - 25101, being 60379, being - 87515, being 75517, being - 35744, being 7160, and then the target curve of the driving range and the pure - electric utilization coefficient can be obtained, as shown in Figure 7 .

[0108] Secondly, a pure - electric utilization coefficient construction device based on energy transmission according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0109] Figure 8 is a block - diagram schematic of the pure - electric utilization coefficient construction device based on energy transmission according to an embodiment of the present invention.

[0110] As shown in Figure 8As shown, the device 10 for constructing the pure electric utilization coefficient based on energy transfer includes: a partitioning module 100, a calculation module 200, and a fitting module 300.

[0111] Among them, the partitioning module 100 is used to divide the effective travel information into multiple trips with reference to the endurance mileage label of the hybrid vehicle, and construct a trip data set in the chronological order of the multiple trips. The trip data set includes multiple trips and the transient parameter information corresponding to each trip; the calculation module 200 is used to calculate the motor drive energy ratio of each trip according to the transient parameter information corresponding to each trip, and perform weighted averaging on the motor drive energy ratio of each trip under each endurance mileage label to obtain the comprehensive motor drive energy ratio corresponding to each endurance mileage label; the fitting module 300 is used to fit the comprehensive motor drive energy ratio corresponding to each endurance mileage label to obtain the pure electric utilization coefficient of the hybrid vehicle.

[0112] In an embodiment of the present invention, the calculation module 200 is further used to calculate the motor output energy and the engine output energy respectively according to the transient parameter information corresponding to each trip; calculate the motor drive energy ratio corresponding to each trip according to the motor output energy and the engine output energy.

[0113] In an embodiment of the present invention, the calculation formula for the motor drive energy ratio is:

[0114]

[0115] Among them, is the label under the total duration of the nth trip, represents the transmission efficiency between the power battery and the motor, represents the thermal efficiency of the engine, represents the instantaneous output power of the motor at the moment, represents the instantaneous output power of the engine at the

[0116] In an embodiment of the present invention, the calculation module 200 is further used to: calculate the weight value of each trip under each endurance mileage label respectively; calculate the energy flow transmission and conversion ratio of each trip under each endurance mileage label according to the weight value of each trip under each endurance mileage label and the motor drive energy ratio corresponding to each trip; average the energy flow transmission and conversion ratio of each trip to obtain the comprehensive motor drive energy ratio corresponding to each endurance mileage label.

[0117] In an embodiment of the present invention, the calculation formula for the weight value of each trip is:

[0118]

[0119] Among them, represents the weight of the th trip, represents the driving mileage of the th trip.

[0120] In an embodiment of the present invention, if the increase in the state of charge (SOC) of the battery of a hybrid vehicle from one power-off to the next power-on exceeds a preset value, it is determined as one charging, and one trip is between two chargings.

[0121] In an embodiment of the present invention, the fitting module 300 is further configured to use an exponential polynomial with constraint conditions to fit the comprehensive motor drive energy ratio corresponding to each cruising range label; and generate the pure electric utilization coefficient of the hybrid vehicle according to the fitting result.

[0122] It should be noted that the foregoing explanation of the embodiment of the method for constructing the pure electric utilization coefficient based on energy transfer also applies to the device for the method for constructing the pure electric utilization coefficient based on energy transfer in this embodiment, and will not be elaborated here.

[0123] Figure 9 The following is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. The electronic device may include:

[0124] A memory 901, a processor 902, and a computer program stored on the memory 901 and executable on the processor 902.

[0125] When the processor 902 executes the program, it implements the method for constructing the pure electric utilization coefficient based on energy transfer provided in the foregoing embodiment.

[0126] Furthermore, the electronic device further includes:

[0127] A communication interface 903 for communication between the memory 901 and the processor 902.

[0128] The memory 901 is used to store a computer program executable on the processor 902.

[0129] The memory 901 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0130] If the memory 901, the processor 902, and the communication interface 903 are implemented independently, the communication interface 903, the memory 901, and the processor 902 can be interconnected via a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 9 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0131] Optionally, in specific implementation, if the memory 901, the processor 902, and the communication interface 903 are integrated on a single chip, the memory 901, the processor 902, and the communication interface 903 can communicate with each other through an internal interface.

[0132] The processor 902 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0133] The embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the above method for constructing a pure electric utilization coefficient based on energy transfer is implemented.

[0134] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0135] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0136] Any process or method description shown in a flowchart or described otherwise herein can be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of the present invention includes additional implementations, where functions may be executed in a substantially simultaneous manner or in an order opposite to that shown or discussed, according to the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0137] It should be understood that various parts of the present invention can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays, field programmable gate arrays, etc.

[0138] Those of ordinary skill in the art of the present technology can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0139] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for constructing a pure electric utilization coefficient based on energy transfer, characterized in that Including the following steps: Dividing the effective trip information into multiple trips with reference to the cruising range label of the hybrid vehicle, and constructing a trip data set according to the time sequence of the multiple trips, wherein the trip data set includes multiple trips and transient parameter information corresponding to each trip; Calculating the motor drive energy ratio of each trip according to the transient parameter information corresponding to each trip, and performing weighted averaging on the motor drive energy ratios of each trip under each cruising range label to obtain the comprehensive motor drive energy ratio corresponding to each cruising range label; Fitting the comprehensive motor drive energy ratio corresponding to each cruising range label to obtain the pure electric utilization coefficient of the hybrid vehicle; The calculating the motor drive energy ratio of each trip according to the transient parameter information corresponding to each trip includes: calculating the motor output energy and the engine output energy respectively according to the transient parameter information corresponding to each trip; calculating the motor drive energy ratio corresponding to each trip according to the motor output energy and the engine output energy, wherein the calculation formula of the motor drive energy ratio is: Among them, is the label the total duration of the th trip, represents the transmission efficiency between the power battery and the motor, represents the thermal efficiency of the engine, represents the instantaneous output power of the motor at time represents the instantaneous output power of the engine at time.

2. The construction method of the pure electric utilization coefficient based on energy transmission according to claim 1, characterized in that The performing weighted averaging on the motor drive energy ratios of each trip under each cruising range label to obtain the comprehensive motor drive energy ratio corresponding to each cruising range label includes: Calculating the weight value of each trip under each cruising range label respectively; Calculating the energy flow transmission and conversion ratio of each trip under each cruising range label according to the weight value of each trip under each cruising range label and the motor drive energy ratio corresponding to each trip; Averaging the energy flow transmission and conversion ratio of each trip to obtain the comprehensive motor drive energy ratio corresponding to each cruising range label.

3. The method for constructing the pure electric utilization coefficient based on energy transmission according to claim 2, wherein the calculation formula of the weight value of each trip is: Among them, Indicates the weight of the th trip, Indicates the driving mileage of the th trip.

4. The method for constructing the pure electric utilization coefficient based on energy transmission according to claim 1, if the increase value of the SOC (State of Charge) of the battery of the hybrid vehicle from one power-off to the next power-on exceeds a preset value, it is determined as one charging, and one trip is between two chargings.

5. The method for constructing the pure electric utilization coefficient based on energy transmission according to claim 1, fitting the comprehensive motor drive energy ratio corresponding to each cruising range label to obtain the pure electric utilization coefficient of the hybrid vehicle, includes: Using an exponential polynomial with constraint conditions to fit the comprehensive motor drive energy ratio corresponding to each cruising range label; Generating the pure electric utilization coefficient of the hybrid vehicle according to the fitting result.

6. A device for constructing a pure electric utilization coefficient based on energy transmission, characterized in that, Including: A dividing module, configured to divide the effective trip information into multiple trips with reference to the cruising range label of the hybrid vehicle, and construct a trip data set according to the time sequence of the multiple trips, wherein the trip data set includes multiple trips and transient parameter information corresponding to each trip; A calculation module, configured to calculate the motor drive energy ratio of each driving cycle according to the transient parameter information corresponding to each driving cycle, and perform weighted averaging on the motor drive energy ratio of each driving cycle under each driving range label to obtain the comprehensive motor drive energy ratio corresponding to each driving range label; A fitting module, configured to fit the comprehensive motor drive energy ratio corresponding to each driving range label to obtain the pure electric utilization coefficient of the hybrid vehicle; The calculation module is further configured to: calculate the motor output energy and the engine output energy respectively according to the transient parameter information corresponding to each driving cycle; calculate the motor drive energy ratio corresponding to each driving cycle according to the motor output energy and the engine output energy, wherein the calculation formula of the motor drive energy ratio is: Among them, is the label the total duration of the th trip, represents the transmission efficiency between the power battery and the motor, represents the thermal efficiency of the engine, indicates the instantaneous output power of the motor at time indicates the instantaneous output power of the engine at time 7. An electronic device, characterized in that, including: A memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the program to implement the method for constructing a pure electric utilization coefficient based on energy transfer according to any one of claims 1-5.

8. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instruction is executed, the method for constructing a pure electric utilization coefficient based on energy transfer according to any one of claims 1-5 is implemented.

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