Method and device for estimating remaining cruising range, vehicle and storage medium

Abstract

This invention discloses a method, apparatus, vehicle, and storage medium for estimating remaining driving range. The method includes: acquiring a first average energy consumption, current remaining battery power, and vehicle weight during the current remaining driving range estimation, and acquiring a second average energy consumption obtained from the previous remaining driving range estimation; determining a weighting factor based on the vehicle weight; weighting and summing the first average energy consumption and the second average energy consumption obtained from the previous remaining driving range estimation based on the weighting factor to obtain the second average energy consumption for the current remaining driving range estimation; and obtaining the remaining driving range for the current remaining driving range estimation based on the second average energy consumption and the current remaining battery power to obtain the current remaining driving range. Therefore, by determining the weighting factor based on the vehicle weight and performing a weighted summation based on the weighting factor to update the average energy consumption, the accuracy of remaining driving range estimation is improved, and the method is simple.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and in particular to a method, apparatus, vehicle, and storage medium for estimating remaining driving range. Background Technology

[0002] With the increasing severity of environmental pollution and energy crisis, new energy vehicles (including pure electric vehicles and hybrid electric vehicles) have become a hot topic of research and development in countries around the world. Among them, improving the accuracy of remaining driving range calculation and reducing users' range anxiety is an important issue in the application of new energy vehicles.

[0003] Currently, there are two main methods for calculating remaining driving range: one is to use vehicle parameters as input and remaining driving range as output to establish a complex functional relationship, and then calculate the remaining driving range based on the real-time parameters of the vehicle. This method requires a large amount of experimental data. The other method is to calculate the remaining driving range based on the historical average energy consumption during vehicle operation and the remaining energy. This method requires ensuring the accuracy of the historical average energy consumption estimation. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, the first objective of this invention is to propose a method for estimating remaining driving range. This method determines weighting factors based on the vehicle's mass and performs a weighted summation based on these weighting factors to update the average energy consumption. This improves the accuracy of average energy consumption estimation without requiring extensive experimental data, thus further enhancing the accuracy of remaining driving range estimation. Furthermore, the method is simple.

[0005] A second objective of this invention is to provide a computer-readable storage medium.

[0006] The third objective of this invention is to provide a device for estimating remaining driving range.

[0007] The fourth objective of this invention is to provide a vehicle.

[0008] To achieve the above objectives, a first aspect of the present invention provides a method for estimating remaining driving range, comprising the following steps: In estimating the remaining driving range, obtaining the vehicle's first average energy consumption, current remaining battery power, and vehicle weight, and obtaining the second average energy consumption obtained in the previous remaining driving range estimation; determining a weighting factor based on the vehicle weight; weighting and summing the first average energy consumption and the second average energy consumption obtained in the previous remaining driving range estimation according to the weighting factor to obtain the second average energy consumption for the current remaining driving range estimation; and obtaining the remaining driving range for the current remaining driving range estimation based on the second average energy consumption and the current remaining battery power, thereby obtaining the current remaining driving range.

[0009] According to the remaining driving range estimation method of the present invention, in the current remaining driving range estimation, the first average energy consumption within a first preset distance already traveled, the current remaining battery power, the vehicle weight, and the second average energy consumption obtained in the previous remaining driving range estimation are obtained. A weighting factor is determined based on the vehicle weight, and the first average energy consumption and the second average energy consumption obtained in the previous remaining driving range estimation are weighted and summed according to the weighting factor to obtain the second average energy consumption for the current remaining driving range estimation. Finally, the remaining driving range for the current remaining driving range estimation is obtained based on the second average energy consumption for the current remaining driving range estimation and the current remaining battery power. Thus, determining the weighting factor based on the vehicle weight and performing a weighted summation based on the weighting factor to update the average energy consumption improves the accuracy of the average energy consumption estimation, and does not require a large amount of experimental data support, thereby improving the accuracy of the remaining driving range estimation. The method is also simple.

[0010] According to one embodiment of the present invention, obtaining the first average power consumption of a vehicle includes: obtaining the discharge current and voltage of a power battery within a first preset distance traveled by the vehicle; and obtaining the average power consumption within the first preset distance based on the discharge current and voltage of the power battery, thereby obtaining the first average power consumption.

[0011] According to one embodiment of the present invention, determining a weighting factor based on the vehicle mass includes: obtaining the change in vehicle mass; if the change in vehicle mass is less than or equal to a preset threshold, then determining the weighting factor corresponding to the first average energy consumption as a preset first weighting factor; if the change in vehicle mass is greater than the preset threshold, then determining the weighting factor corresponding to the first average energy consumption as a second weighting factor based on the change in vehicle mass.

[0012] According to one embodiment of the present invention, the greater the change in the overall vehicle mass, the greater the second weighting factor.

[0013] According to one embodiment of the present invention, when the change in vehicle mass is greater than a preset threshold, the method further includes: obtaining the mileage already driven by the vehicle after the change in vehicle mass; if the mileage already driven is less than or equal to a second preset distance, then determining the weighting factor corresponding to the first average power consumption as the second weighting factor; if the mileage already driven is greater than the second preset distance, then determining the weighting factor corresponding to the first average power consumption as the first weighting factor.

[0014] According to one embodiment of the present invention, the method further includes: obtaining historical average power consumption when the vehicle is powered on; and obtaining initial remaining driving range based on historical average power consumption and current remaining power.

[0015] According to one embodiment of the present invention, the remaining driving range is estimated once every third preset distance traveled by the vehicle, wherein the third preset distance is less than the first preset distance.

[0016] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, characterized in that the computer program, when executed by a processor, implements the steps of the above-described method for estimating remaining driving range.

[0017] According to the computer-readable storage medium of the present invention, the remaining driving range estimation method described above determines the weighting factor based on the vehicle mass and performs a weighted summation based on the weighting factor to update the average power consumption, thereby improving the accuracy of the average power consumption estimation without requiring a large amount of experimental data support, thus improving the accuracy of the remaining driving range estimation, and the method is simple.

[0018] To achieve the above objectives, a third aspect of the present invention provides a device for estimating remaining driving range, comprising: an acquisition module, configured to acquire, during the current remaining driving range estimation, a first average energy consumption of the vehicle, the current remaining battery power, and the vehicle mass, and to acquire a second average energy consumption obtained during the previous remaining driving range estimation; a first estimation module, configured to determine a weighting factor based on the vehicle mass, and to perform a weighted summation of the first average energy consumption and the second average energy consumption obtained during the previous remaining driving range estimation based on the weighting factor, to obtain the second average energy consumption for the current remaining driving range estimation; and a second estimation module, configured to acquire the remaining driving range for the current remaining driving range estimation based on the second average energy consumption and the current remaining battery power, thereby obtaining the current remaining driving range.

[0019] The remaining driving range estimation device according to an embodiment of the present invention acquires, through an acquisition module, a first average energy consumption within a first preset distance already traveled by the vehicle, the current remaining battery power, the vehicle mass, and a second average energy consumption obtained during the previous remaining driving range estimation. A first estimation module determines a weighting factor based on the vehicle mass, and then weights and sums the first average energy consumption and the second average energy consumption obtained during the previous remaining driving range estimation according to the weighting factor to obtain the second average energy consumption for the current remaining driving range estimation. Finally, a second estimation module acquires the remaining driving range for the current remaining driving range estimation based on the second average energy consumption for the current remaining driving range estimation and the current remaining battery power. Therefore, by determining the weighting factor based on the vehicle mass and performing a weighted summation based on the weighting factor to update the average energy consumption, the accuracy of the average energy consumption estimation is improved, and no large amount of experimental data is required, thereby improving the accuracy of the remaining driving range estimation. Furthermore, the method is simple.

[0020] To achieve the above objectives, a fourth aspect of the present invention provides a vehicle that includes the aforementioned remaining driving range estimation device.

[0021] According to the vehicle of the present invention, the remaining driving range estimation device described above determines the weighting factor based on the vehicle mass and performs a weighted summation based on the weighting factor to update the average energy consumption, thereby improving the accuracy of the average energy consumption estimation without requiring a large amount of experimental data, thus improving the accuracy of the remaining driving range estimation, and the method is simple.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] Figure 1 A flowchart illustrating a method for estimating remaining driving range according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram illustrating the estimation of remaining driving range according to an embodiment of the present invention;

[0025] Figure 3 This is a flowchart illustrating the second average energy consumption for estimating the remaining driving range according to another embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of a device for estimating remaining driving range according to an embodiment of the present invention. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] The following description, with reference to the accompanying drawings, outlines the method, apparatus, vehicle, and storage medium for estimating remaining driving range provided by embodiments of the present invention.

[0029] Figure 1 This is a flowchart illustrating a method for estimating remaining driving range according to an embodiment of the present invention. Figure 1 As shown, the method for estimating the remaining driving range may include the following steps:

[0030] Step S101: When estimating the remaining driving range this time, obtain the vehicle's first average energy consumption, current remaining energy and vehicle weight, and obtain the second average energy consumption obtained in the last remaining driving range estimation.

[0031] Specifically, in some embodiments, obtaining the first average energy consumption of the vehicle includes: obtaining the discharge current and voltage of the power battery within a first preset distance traveled by the vehicle; and obtaining the average energy consumption within the first preset distance based on the discharge current and voltage of the power battery, thereby obtaining the first average energy consumption. Optionally, the first average energy consumption within the first preset distance traveled by the vehicle can be estimated using an integral method. Assuming the first preset distance is L1, the first average energy consumption Q can be estimated using the following formula (1). e :

[0032]

[0033] Where I is the discharge current of the vehicle's power battery, and U is the voltage of the vehicle's power battery.

[0034] The current remaining charge (SOC) is the remaining driving range estimated at this time. The remaining charge of the power battery can be obtained from the power battery management system.

[0035] Vehicle mass includes the vehicle mass M recorded from the last historical data. e And the actual vehicle mass M estimated based on the vehicle dynamics model. c .

[0036] The second average energy consumption Q obtained during the last remaining driving range estimation c It can be obtained from historical records.

[0037] In some embodiments, the remaining driving range is estimated once every third preset distance traveled by the vehicle. The third preset distance is less than the first preset distance. The first preset distance can be an integer multiple or a non-integer multiple of the third preset distance, and there is no restriction here. That is to say, the estimation can be performed every shorter preset distance to ensure the timeliness of the estimation. At the same time, the first average power consumption within a longer preset distance is obtained during the estimation to ensure the accuracy of the first average power consumption estimation.

[0038] Specifically, refer to Figure 2 As shown, assuming the third preset distance is L3, the remaining driving range will be estimated every third preset distance L3. During the estimation, the first average power consumption within the nearest first preset distance L1 is calculated using the above formula (1), thereby ensuring the timeliness and accuracy of the estimation.

[0039] Step S102: Determine the weighting factor based on the overall vehicle weight.

[0040] It should be noted that the remaining driving range is related to many factors, including road conditions, driving habits, ambient temperature, and vehicle weight. Therefore, it needs to be estimated in real time based on the actual operating conditions of the vehicle. Among these factors, vehicle weight has a significant impact on the remaining driving range; the range when fully loaded and unloaded can differ by 30 kilometers or more. If the vehicle weight changes, the average energy consumption cannot be quickly corrected to the true value, leading to inaccurate predictions of the remaining driving range. Therefore, in this application, the weighting factor can be adjusted according to the vehicle weight to ensure the accuracy of the remaining driving range prediction.

[0041] In some embodiments, determining a weighting factor based on the vehicle mass includes: obtaining the change in vehicle mass; if the change in vehicle mass is less than or equal to a preset threshold, determining the weighting factor corresponding to the first average energy consumption as a preset first weighting factor; if the change in vehicle mass is greater than the preset threshold, determining the weighting factor corresponding to the first average energy consumption as a second weighting factor based on the change in vehicle mass.

[0042] Specifically, considering that the change in vehicle mass occurs when the vehicle is stationary, the change in vehicle mass can be obtained when the vehicle switches from a stationary state to a moving state. Specifically, this could be done when the vehicle is first powered on or when its speed is zero for a preset time. To obtain the change in vehicle mass, the previously recorded vehicle mass M can be read from the historical records. e And estimate the actual vehicle mass M based on the vehicle dynamics model. c Thus, the change in the total vehicle mass ΔM can be obtained, i.e., ΔM = |M e -M c |

[0043] When the change in vehicle mass ΔM is less than or equal to a preset threshold, it indicates that the change in vehicle mass is small, and the weighting factor corresponding to the first average energy consumption remains the preset first weighting factor Y1. When the change in vehicle mass ΔM is greater than the preset threshold, it indicates that the change in vehicle mass is large, which has a significant impact on the remaining driving range. Therefore, the first weighting factor Y1 is adjusted to the second weighting factor Y2 based on the change in vehicle mass. Optionally, the larger the change in vehicle mass, the larger the second weighting factor, that is, the second weighting factor Y2 increases as the change in vehicle mass ΔM increases. This can be obtained in advance through actual vehicle calibration. It should be noted that the first weighting factor Y1 and the second weighting factor Y2 are any real numbers greater than 0 and less than 1.

[0044] Furthermore, when the change in vehicle mass ΔM exceeds a preset threshold, the recorded vehicle mass M is also... e The system is updated so that the change in vehicle mass can be obtained the next time the vehicle switches from a stationary state to a moving state.

[0045] In some embodiments, when the change in vehicle mass is greater than a preset threshold, the method further includes: obtaining the mileage already driven by the vehicle after the change in vehicle mass; if the mileage already driven is less than or equal to a second preset distance, then determining the weighting factor corresponding to the first average energy consumption as the second weighting factor; if the mileage already driven is greater than the second preset distance, then determining the weighting factor corresponding to the first average energy consumption as the first weighting factor.

[0046] Specifically, when the change in vehicle mass exceeds a preset threshold, the second weighting factor Y2 is first obtained based on the change in vehicle mass. Then, the mileage already driven after the change in vehicle mass is obtained. If the mileage already driven is less than or equal to the second preset distance L2, the weighting factor corresponding to the first average energy consumption is adjusted from the first weighting factor Y1 to the second preset weighting factor Y2. Correspondingly, the weighting factor corresponding to the second average energy consumption obtained in the previous remaining driving range estimation is adjusted from (1-Y1) to (1-Y2). If the mileage already driven is greater than the second preset distance L2, the weighting factor corresponding to the first average energy consumption remains unchanged at the first weighting factor Y1. This not only makes the second average energy consumption of the remaining driving range estimation closer to the true value, but also prevents large sudden changes.

[0047] Step S103: Based on the weighting factor, the first average energy consumption and the second average energy consumption obtained in the previous remaining driving range estimation are weighted and summed to obtain the second average energy consumption for the current remaining driving range estimation.

[0048] Specifically, based on the weighting factors determined by the aforementioned vehicle mass, the first average energy consumption Q is... e The second average energy consumption Q obtained from the last remaining driving range estimate c-1 We perform a weighted summation to obtain the second average energy consumption Q for this remaining driving range estimation. c This ensures the second average energy consumption Q in the current remaining driving range estimation. c It has high accuracy. Assuming the first average energy consumption corresponds to the first weighting factor Y1, and the second average energy consumption Q obtained in the previous remaining driving range estimation... c-1 The corresponding weight is (1-Y1), so the second average energy consumption Q in this remaining driving range estimation is... c It can be calculated using the following formula (2):

[0049] Q c =Q e ×Y1+Q c-1 ×(1-Y1) (2)

[0050] It should be noted that when the weighting factor corresponding to the first average energy consumption changes from the first weighting factor Y1 to the second weighting factor Y2, the second average energy consumption Q obtained in the previous remaining driving range estimation will be...c-1 The corresponding weight also becomes (1-Y2), which is the second average energy consumption Q when calculating the estimated remaining driving range. c In formula (2), Y1 is replaced with Y2.

[0051] Furthermore, as a concrete example, refer to Figure 3 As shown, the second average energy consumption for estimating the remaining driving range may include the following steps:

[0052] Step S201: Power on the vehicle, i.e., the vehicle starts and obtains power.

[0053] Step S202, obtain the first average power consumption Q e And the previous second average power consumption Q c-1 That is, to obtain the first average power consumption Q within the first preset distance L1 that the vehicle has traveled. e And the second average energy consumption Q obtained from the last remaining driving range estimate. c-1 .

[0054] Step S203: Estimate the second average energy consumption Q for the remaining driving range using Y1. e .

[0055] Specifically, the first average energy consumption is determined by the first weighting factor Y1 corresponding to the first average energy consumption and the second average energy consumption Q at the time of the last remaining driving range estimation. c-1 The corresponding weight (1-Y1) is used to estimate the second average energy consumption Q for the remaining driving range. e Q c =Q e ×Y1+Q c-1 ×(1-Y1).

[0056] Step S204: Determine whether Me-Mc is greater than a preset threshold. If yes, proceed to step S205; otherwise, return to step S203.

[0057] Step S205: Update Y1 to Y2, that is, update the first weight factor Y1 to the second preset weight Y2.

[0058] Step S206: Determine whether the distance already traveled is greater than the second preset distance L2.

[0059] Specifically, after the vehicle's mass changes, it is determined whether the vehicle's mileage has exceeded the first preset distance L1. If so, the process returns to step S203; otherwise, step S207 is executed.

[0060] Step S207: Estimate the second average energy consumption Q for the remaining driving range using Y2. e '.

[0061] Specifically, the second weighting factor Y2 corresponding to the first average energy consumption and the second average energy consumption Q at the time of the last remaining driving range estimation are used. c-1 The corresponding weight (1-Y2) is used to estimate the second average energy consumption Q for the remaining driving range. e ', i.e. Q c '=Q e ×Y2+Q c-1 ×(1-Y2).

[0062] Step S208: Is there a power-off requirement? If so, proceed to step S209; otherwise, return to step S204.

[0063] Step S209: Store the vehicle weight and the second average power consumption.

[0064] As can be seen from the above example, the weighting factor can be determined based on the change in vehicle mass and the mileage driven after the change in vehicle mass, so as to obtain a more accurate second average energy consumption, thereby making the remaining driving range prediction more accurate.

[0065] Step S104: Based on the second average power consumption at the time of the current remaining driving range estimation and the current remaining power, obtain the remaining driving range at the time of the current remaining driving range estimation, and obtain the current remaining driving range.

[0066] Specifically, the current remaining power SOC is divided by the second average power consumption Q at the time of this remaining driving range estimation. c This will give you the remaining driving range at the time of the estimated remaining driving range, which is the current remaining driving range.

[0067] In some embodiments, the above-mentioned method for estimating the remaining driving range further includes: obtaining historical average power consumption when the vehicle is powered on; and obtaining the initial remaining driving range based on the historical average power consumption and the current remaining power.

[0068] In other words, when the vehicle is initially powered on but not yet driven, the historical average power consumption and the current remaining power can be obtained from the power battery management system. The current remaining power is divided by the historical average power consumption to obtain the initial remaining driving range. It should be noted that the historical average power consumption is the second average power consumption obtained before the vehicle was turned off, which was used to estimate the remaining driving range. The historical average power consumption is used as the second average power consumption of the previous remaining driving range estimation and substituted into the above formula (2) for weighted summation. This allows for a more accurate estimation of the second average power consumption of the remaining driving range when the vehicle is first powered on, thus making the remaining driving range estimation more accurate.

[0069] In summary, the remaining driving range estimation method according to the embodiments of the present invention determines the weighting factor based on the vehicle mass and performs a weighted summation based on the weighting factor to update the average energy consumption, thereby improving the accuracy of the average energy consumption estimation. Moreover, it does not require a large amount of experimental data support, thus improving the accuracy of the remaining driving range estimation, and the method is simple. At the same time, by updating the weighting factor in real time through the vehicle mass, the remaining driving range can be made closer to the true value when the vehicle load changes.

[0070] In some embodiments of the present invention, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the above-described method for estimating the remaining driving range.

[0071] According to the computer-readable storage medium of the present invention, the remaining driving range estimation method described above determines the weighting factor based on the vehicle mass and performs a weighted summation based on the weighting factor to update the average power consumption, thereby improving the accuracy of the average power consumption estimation without requiring a large amount of experimental data support, thus improving the accuracy of the remaining driving range estimation, and the method is simple.

[0072] Figure 4 This is a schematic diagram of a device for estimating remaining driving range according to an embodiment of the present invention. Figure 4 As shown, the remaining driving range estimation device 100 includes: an acquisition module 110, a first estimation module 120, and a second estimation module 130.

[0073] The acquisition module 110 is used to acquire the vehicle's first average energy consumption, current remaining battery power, and vehicle weight during the current remaining driving range estimation, and to acquire the second average energy consumption obtained during the previous remaining driving range estimation; the first estimation module 120 is used to determine a weighting factor based on the vehicle weight, and to perform a weighted sum of the first average energy consumption and the second average energy consumption obtained during the previous remaining driving range estimation based on the weighting factor, to obtain the second average energy consumption during the current remaining driving range estimation; the second estimation module 120 is used to acquire the remaining driving range during the current remaining driving range estimation based on the second average energy consumption during the current remaining driving range estimation and the current remaining battery power, so as to obtain the current remaining driving range.

[0074] In some embodiments, the acquisition module 110 is specifically used to: acquire the discharge current and voltage of the power battery within a first preset distance traveled by the vehicle; and acquire the average power consumption within the first preset distance based on the discharge current and voltage of the power battery to obtain a first average power consumption.

[0075] In some embodiments, the first estimation module 120 is specifically used to: obtain the change in vehicle mass; if the change in vehicle mass is less than or equal to a preset threshold, determine the weighting factor corresponding to the first average power consumption as a preset first weighting factor; if the change in vehicle mass is greater than the preset threshold, determine the weighting factor corresponding to the first average power consumption as a second weighting factor based on the change in vehicle mass.

[0076] In some embodiments, the greater the change in vehicle mass, the larger the second weighting factor.

[0077] In some embodiments, the first estimation module 120 is specifically used to: obtain the mileage driven by the vehicle after the change in vehicle weight; if the mileage driven is less than or equal to a second preset distance, determine the weighting factor corresponding to the first average power consumption as the second weighting factor; if the mileage driven is greater than the second preset distance, determine the weighting factor corresponding to the first average power consumption as the first weighting factor.

[0078] In some embodiments, the acquisition module 110 is further configured to: acquire historical average power consumption when the vehicle is powered on; and acquire initial remaining driving range based on historical average power consumption and current remaining power.

[0079] In some embodiments, the remaining driving range is estimated every third preset distance traveled by the vehicle, wherein the third preset distance is less than the first preset distance.

[0080] It should be noted that the description of the remaining driving range estimation device in this application is similar to the description of the remaining driving range estimation method in this application, and will not be repeated here.

[0081] The remaining driving range estimation device according to an embodiment of the present invention acquires, through an acquisition module, a first average energy consumption within a first preset distance already traveled by the vehicle, the current remaining battery power, the vehicle mass, and a second average energy consumption obtained during the previous remaining driving range estimation. A first estimation module determines a weighting factor based on the vehicle mass, and then weights and sums the first average energy consumption and the second average energy consumption obtained during the previous remaining driving range estimation according to the weighting factor to obtain the second average energy consumption for the current remaining driving range estimation. Finally, a second estimation module acquires the remaining driving range for the current remaining driving range estimation based on the second average energy consumption for the current remaining driving range estimation and the current remaining battery power. Therefore, by determining the weighting factor based on the vehicle mass and performing a weighted summation based on the weighting factor to update the average energy consumption, the accuracy of the average energy consumption estimation is improved, and no large amount of experimental data is required, thereby improving the accuracy of the remaining driving range estimation. Furthermore, the method is simple.

[0082] In some embodiments of the present invention, a vehicle is also provided, including the aforementioned remaining driving range estimation device.

[0083] According to the vehicle of the present invention, the remaining driving range estimation device described above determines the weighting factor based on the vehicle mass and performs a weighted summation based on the weighting factor to update the average energy consumption, thereby improving the accuracy of the average energy consumption estimation without requiring a large amount of experimental data, thus improving the accuracy of the remaining driving range estimation, and the method is simple.

[0084] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0085] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0086] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0088] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0089] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled 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 estimating remaining driving range, characterized in that, Includes the following steps: In this remaining driving range estimation, the vehicle's first average energy consumption, current remaining battery power, and vehicle weight are obtained, and the second average energy consumption obtained in the previous remaining driving range estimation is also obtained. The weighting factor is determined based on the overall vehicle weight. The second average energy consumption for the current remaining driving range estimation is obtained by weighting and summing the first average energy consumption and the second average energy consumption obtained in the previous remaining driving range estimation according to the weighting factor. Based on the second average power consumption at the time of the current remaining driving range estimation and the current remaining power, the remaining driving range at the time of the current remaining driving range estimation is obtained, and the current remaining driving range is obtained. The step of determining the weighting factor based on the vehicle mass includes: obtaining the change in vehicle mass; if the change in vehicle mass is less than or equal to a preset threshold, then determining the weighting factor corresponding to the first average power consumption as a preset first weighting factor; if the change in vehicle mass is greater than the preset threshold, then determining the weighting factor corresponding to the first average power consumption as a second weighting factor based on the change in vehicle mass.

2. The method for estimating remaining driving range according to claim 1, characterized in that, The acquisition of the vehicle's first average energy consumption includes: Obtain the discharge current and voltage of the power battery within the first preset distance traveled by the vehicle; The average power consumption within the first preset distance is obtained based on the discharge current and voltage of the power battery, so as to obtain the first average power consumption.

3. The method for estimating remaining driving range according to claim 1, characterized in that, The greater the change in the overall vehicle mass, the larger the second weighting factor.

4. The method for estimating remaining driving range according to claim 1 or 3, characterized in that, When the change in the overall vehicle weight exceeds the preset threshold, the method further includes: Obtain the vehicle's mileage after the change in overall vehicle weight; If the mileage already traveled is less than or equal to the second preset distance, then the weighting factor corresponding to the first average power consumption is determined to be the second weighting factor; If the mileage already traveled is greater than the second preset distance, then the weighting factor corresponding to the first average power consumption is determined to be the first weighting factor.

5. The method for estimating remaining driving range according to claim 1, characterized in that, The method further includes: When the vehicle is powered on, the historical average power consumption is obtained; The initial remaining driving range is obtained based on the historical average power consumption and the current remaining power.

6. The method for estimating remaining driving range according to claim 2, characterized in that, The remaining driving range is estimated every third preset distance the vehicle travels, wherein the third preset distance is less than the first preset distance.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method for estimating the remaining driving range as described in any one of claims 1 to 6.

8. A device for estimating remaining driving range, characterized in that, include: The acquisition module is used to acquire the vehicle's first average energy consumption, current remaining battery power, and vehicle weight when estimating the remaining driving range for the current time, and to acquire the second average energy consumption obtained from the previous remaining driving range estimation. The first estimation module is used to determine a weighting factor based on the vehicle mass, and to obtain the second average energy consumption for the current remaining driving range estimation by weighted summing of the first average energy consumption and the second average energy consumption obtained in the previous remaining driving range estimation based on the weighting factor. The second estimation module is used to obtain the remaining driving range at the time of the current remaining driving range estimation based on the second average power consumption and the current remaining power, so as to obtain the current remaining driving range. The step of determining the weighting factor based on the vehicle mass includes: obtaining the change in vehicle mass; if the change in vehicle mass is less than or equal to a preset threshold, then determining the weighting factor corresponding to the first average power consumption as a preset first weighting factor; if the change in vehicle mass is greater than the preset threshold, then determining the weighting factor corresponding to the first average power consumption as a second weighting factor based on the change in vehicle mass.

9. A vehicle, characterized in that, Includes the remaining driving range estimation device as described in claim 8.

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