CN107284248B - Method and device for calculating driving range of automobile - Google Patents

Method and device for calculating driving range of automobile Download PDF

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CN107284248B
CN107284248B CN201710506026.7A CN201710506026A CN107284248B CN 107284248 B CN107284248 B CN 107284248B CN 201710506026 A CN201710506026 A CN 201710506026A CN 107284248 B CN107284248 B CN 107284248B
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driving range
calculating
upper limit
real
variation
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CN107284248A (en
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严丽娟
庞文涛
代康伟
梁海强
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Beijing Electric Vehicle Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2260/00—Operating Modes
    • B60L2260/40—Control modes
    • B60L2260/50—Control modes by future state prediction
    • B60L2260/52—Control modes by future state prediction drive range estimation, e.g. of estimation of available travel distance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
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  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides a method and a device for calculating the driving range of an automobile, wherein the method comprises the following steps: calculating the upper limit threshold of the change gradient of the driving range according to the charging current value sent by the battery management system; calculating the real-time mileage variation according to the available capacity of the battery sent by the battery management system; judging whether the real-time mileage variation is larger than the upper limit threshold of the driving mileage variation gradient; if so, calculating the driving range according to the upper limit threshold of the variation gradient of the driving range; and if the judgment result is negative, calculating the driving range according to the real-time range variation. The method and the device for calculating the driving range of the automobile can reduce the complexity of algorithm design and further reduce the complexity of testing.

Description

Method and device for calculating driving range of automobile
Technical Field
The invention relates to the technical field of automobile driving range calculation, in particular to a method and a device for calculating the automobile driving range.
Background
At present, the problems of energy consumption and environmental pollution are more and more emphasized in various countries in the world, and various products adopting clean energy are gradually released and gradually replace traditional energy consumption products. Compared with the traditional automobile which consumes gasoline or diesel oil to generate driving force, the new energy automobile adopts electric energy as driving energy, does not discharge waste gas, is accepted by markets and users, and has gradually increased output.
New energy automobiles on the market can be charged secondarily, and the charging mode generally comprises an alternating current charging mode and a direct current charging mode. In general, in a charging state, different calculation strategies are adopted to calculate the driving range according to different charging modes, and a range change gradient and a range change correction coefficient required in the calculation process also need to be adjusted according to actual conditions, so that various driving range calculation modes are generated. Not only the algorithm design process is more complicated, but also the workload of the test process is improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a method for calculating a driving range of an automobile, so as to reduce the complexity of algorithm design and further reduce the complexity of testing.
The second purpose of the invention is to provide a vehicle driving range calculating device.
A third object of the invention is to propose a computer device.
A fourth object of the invention is to propose a non-transitory computer-readable storage medium.
A fifth object of the invention is to propose a computer program product.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for calculating a driving range of an automobile, including:
calculating the upper limit threshold of the change gradient of the driving range according to the charging current value sent by the battery management system;
calculating the real-time mileage variation according to the available capacity of the battery sent by the battery management system;
judging whether the real-time mileage variation is larger than the upper limit threshold of the driving mileage variation gradient;
if so, calculating the driving range according to the upper limit threshold of the variation gradient of the driving range;
and if the judgment result is negative, calculating the driving range according to the real-time range variation.
According to the method provided by the embodiment of the invention, the upper limit threshold of the variation gradient of the driving range is calculated according to the charging current value sent by the battery management system, the real-time range variation is calculated according to the available capacity of the battery sent by the battery management system, and the smaller value of the upper limit threshold of the variation gradient of the driving range and the real-time range variation is selected to be used for calculating the driving range. The driving range can be calculated according to the charging current value and the available capacity of the battery sent by the battery management system, the alternating current charging mode or the direct current charging mode does not need to be distinguished, the algorithm is simple, the universality is high, the complexity of the algorithm design can be further reduced, and the workload of the testing process is also reduced.
In order to achieve the above object, a second aspect of the present invention provides an apparatus for calculating a driving range of an automobile, including:
the driving range change upper limit threshold calculation module is used for calculating the driving range change upper limit threshold according to the charging current value sent by the battery management system;
the real-time mileage variable quantity calculating module is used for calculating the real-time mileage variable quantity according to the available capacity of the battery sent by the battery management system;
the judging module is used for judging whether the real-time mileage variation is larger than the upper limit threshold of the driving range variation gradient;
the driving range calculating module is used for calculating the driving range according to the upper limit threshold value of the variation gradient of the driving range when the judgment result is yes;
and the driving range calculating module is also used for calculating the driving range according to the real-time range variation when the judgment result is negative.
To achieve the above object, a third embodiment of the present invention provides a computer device, including: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the method as described above.
In order to achieve the above object, a fourth aspect of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the method as described above.
In order to achieve the above object, a fifth embodiment of the present invention provides a computer program product, wherein when the instructions in the computer program product are executed by a processor, the method as described above is performed.
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.
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The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a method for calculating a driving range of an automobile according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a further method for calculating a driving range of an automobile according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating another method for calculating a driving range of an automobile according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an apparatus for calculating a driving range of an automobile according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a driving range calculating module in the vehicle driving range calculating device according to the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes an automobile driving range calculation method and apparatus according to an embodiment of the present invention with reference to the drawings.
Fig. 1 is a schematic flow chart of a method for calculating a driving range of an automobile according to an embodiment of the present invention.
In order to solve the problem, the embodiment of the invention provides a method for calculating the driving range of an automobile, so as to calculate the driving range of the automobile. The method provided by the embodiment can be realized by a driving range calculating device in a driving range controller in an automobile. As shown in fig. 1, the method for calculating the driving range of the automobile comprises the following steps:
and step 101, calculating the upper limit threshold of the change gradient of the driving range according to the charging current value sent by the battery management system.
And 102, calculating the real-time mileage variation according to the available capacity of the battery sent by the battery management system.
103, judging whether the real-time mileage variation is larger than the upper limit threshold of the driving mileage variation gradient; if yes, go to step 104; if not, go to step 105.
And 104, calculating the driving range according to the upper limit threshold of the variation gradient of the driving range.
And 105, calculating the driving range according to the real-time range variation.
In this embodiment, step 101 is to calculate the upper limit threshold of the range change gradient according to the charging current value sent by the battery management system. The upper limit threshold of the change gradient of the driving range is the maximum value of the change gradient of the driving range, and is used for limiting the increment of the driving range and avoiding the situation that the driving range is steeply increased.
Step 102 is used for calculating the real-time mileage variation according to the available capacity of the battery sent by the battery management system. The real-time mileage variation is a difference value between the real-time mileage calculated in the current period and the real-time mileage calculated in the previous period. The available capacity of the battery and the driving range have a certain corresponding relation, so that the variation of the driving range can be calculated through the available capacity of the battery.
Step 103, judging the real-time mileage variation and the upper limit threshold of the driving mileage variation gradient, and if the real-time mileage variation is smaller than the upper limit threshold of the driving mileage variation gradient, calculating the driving mileage according to the real-time mileage variation; and if the upper limit threshold value of the change gradient of the driving range is larger than the upper limit threshold value of the change gradient of the driving range, calculating the driving range according to the upper limit threshold value of the change gradient of the driving range. That is, the driving range is calculated according to the smaller value between the two values to limit the increase of the driving range and avoid the steep increase.
The specific sequence of the steps 101 and 102 is not limited, that is: step 101 may be performed before step 102 or after step 102.
According to the technical scheme adopted by the embodiment, the upper limit threshold of the change gradient of the driving range is calculated according to the charging current value sent by the battery management system, the real-time range variation is calculated according to the available capacity of the battery sent by the battery management system, and the smaller value of the upper limit threshold of the change gradient of the driving range and the real-time range variation is selected to be used for calculating the driving range. The driving range can be calculated according to the charging current value and the available capacity of the battery sent by the battery management system, the alternating current charging mode or the direct current charging mode does not need to be distinguished, the algorithm is simple, the universality is high, the complexity of the algorithm design can be further reduced, and the workload of the testing process is also reduced.
In addition, in the process of calculating the driving range, the driving range controller only needs to receive the charging current value and the available capacity of the battery sent by the battery management system, so that data transmission is carried out between the driving range controller and the battery management system through a data communication line, data of other devices do not need to be received, connection with other equipment is not needed, and the fault rate caused by poor line contact can be reduced as long as the data communication line between the driving range controller and the battery management system is firmly connected.
For clarity of the above embodiment, the present embodiment provides another method for calculating the driving range of the vehicle, which is optimized for the above embodiment, especially for the way of calculating the driving range according to the upper limit threshold of the variation gradient of the driving range. Fig. 2 is a schematic flow chart of another method for calculating the driving range of the vehicle according to the embodiment of the present invention.
As shown in fig. 2, steps 101, 102, 103 and 105 can be implemented with reference to the above-described embodiments. This embodiment optimizes the above step 104:
step 104 may be implemented by the following steps:
and 1041, acquiring the driving range base number calculated in the previous period.
And step 1042, calculating the sum of the base number of the driving range and the upper limit threshold of the variation gradient of the driving range as the driving range.
The technical scheme provided by the embodiment is executed periodically, and the driving range calculated in each period is stored and used as the driving range base number for calculating in the next period.
In this embodiment, the base number of the range calculated in the previous cycle may be read from the storage area. And then adding the base number of the driving range and the upper limit threshold of the variation gradient of the driving range to obtain the driving range.
For clarity of the above embodiment, the present embodiment provides another method for calculating the driving range of the vehicle, which is optimized for the above embodiment, especially for the way of calculating the driving range according to the upper limit threshold of the variation gradient of the driving range. Fig. 3 is a schematic flow chart of another method for calculating the driving range of the vehicle according to the embodiment of the present invention.
As shown in fig. 3, steps 101, 102, 103 and 104 can be implemented with reference to the above-described embodiments. This embodiment optimizes the above step 105:
step 105 may be implemented by the following steps:
step 1051, obtaining the base number of the driving range calculated in the previous period;
and 1052, calculating the sum of the base number of the driving range and the variable quantity of the real-time range to serve as the driving range.
The technical scheme provided by the embodiment is executed periodically, and the driving range calculated in each period is stored and used as the driving range base number for calculating in the next period.
In this embodiment, the base number of the range calculated in the previous cycle may be read from the storage area. And then adding the base number of the driving range and the variable quantity of the real-time range to obtain the driving range.
In order to clearly illustrate the above embodiment, the present embodiment provides another method for calculating the driving range of the vehicle, which is to optimize the above embodiment, in particular, the method for calculating the upper limit threshold of the variation gradient of the driving range according to the charging current value sent by the battery management system.
The range change upper-limit gradient threshold value is calculated by the following formula,
wherein D is the upper limit threshold of the variation gradient of the driving range, K is the upper limit correction coefficient of current, X is the charging current value sent by the battery management system, delta t is the charging time, and N is the unit energy consumption.
The charging time Δ t is a calculation period, that is, a time interval between two adjacent driving range calculations. The unit energy consumption N is the battery capacity consumed per kilometer. The current upper limit correction coefficient K may be set experimentally. For example: the rated current value is 80A, the actual charging current value measured through multiple experiments is 70A-100A, and the current upper limit correction coefficient K is set so that the product of the current upper limit correction coefficient K and the charging current value X is smaller than the maximum charging current value 100A.
And calculating to obtain the upper limit threshold value D of the change gradient of the driving range by adopting the formula. Of course, the embodiment provides only a specific implementation manner, and those skilled in the art may also modify the above formula to obtain other calculation formulas, and further calculate to obtain the upper limit threshold D of the range change gradient. The range-change upper-limit gradient threshold D may be obtained in other manners, and is not limited to the above formula.
In order to clearly illustrate the above embodiment, the present embodiment provides another method for calculating the driving range of the vehicle, which is to optimize the above embodiment, and in particular, optimize the manner of calculating the real-time range change amount according to the available capacity of the battery sent by the battery management system.
First, the available capacity of the battery sent by the battery management system in the previous period is obtained.
Then, the real-time mileage variation is calculated by the following formula,
Figure BDA0001334693820000052
wherein, Delta S is the real-time mileage variation, N is the unit energy consumption, C1Available capacity of battery, C, from battery management system0The available capacity of the battery from the battery management system in the previous period.
The unit energy consumption N is the battery capacity consumed per kilometer. After a calculation cycle, the available capacity of the battery increases compared to the previous cycle. In each calculation cycle, the available capacity of the battery sent by the battery management system is received and stored for the calculation in the next cycle.
C0Available battery capacity, C, from the battery management system of the previous cycle1The available capacity of the battery sent by the battery management system in the period is C1-C0Is the increment of the available capacity of the battery in one calculation cycle. The ratio of the increment of the available capacity of the battery to the unit energy consumption N is the real-time mileage variation delta S.
The real-time mileage variation Delta S can be calculated by adopting the formula. Of course, the embodiment provides only a specific implementation manner, and those skilled in the art may also modify the above formula to obtain other calculation formulas, and further calculate the real-time mileage variation Δ S. The real-time mileage variation Δ S may be obtained in other manners, and is not limited to the above formula.
Further, in a possible implementation manner of the embodiment of the present invention, the calculated endurance mileage may be corrected, and corresponding correction parameters are set according to different types of batteries, so that the endurance mileage can be increased more uniformly, and a steep increase is avoided.
In order to implement the embodiment, the invention further provides an automobile driving range calculating device.
Fig. 4 is a schematic structural diagram of an automobile driving range calculating device according to an embodiment of the present invention.
As shown in fig. 4, the vehicle driving range calculation apparatus includes: the system comprises a driving range change gradient upper limit threshold calculation module 11, a real-time range change amount calculation module 12, a judgment module 13 and a driving range calculation module 14.
The driving range change upper-limit gradient threshold calculation module 11 is configured to calculate the driving range change upper-limit gradient threshold according to the charging current value sent by the battery management system. The real-time mileage variation calculating module 12 is configured to calculate a real-time mileage variation according to the available capacity of the battery sent by the battery management system. The judging module 13 is configured to judge whether the real-time mileage variation is greater than an upper limit threshold of the driving range variation gradient. The driving range calculating module 14 is used for calculating the driving range according to the upper limit threshold of the variation gradient of the driving range when the judgment result is yes; and when the judgment result is negative, calculating the driving range according to the real-time range variation.
According to the technical scheme, the upper limit threshold of the change gradient of the driving range is calculated according to the charging current value sent by the battery management system, the real-time range variation is calculated according to the available capacity of the battery sent by the battery management system, and the smaller value of the upper limit threshold of the change gradient of the driving range and the real-time range variation is selected to be used for calculating the driving range. The driving range can be calculated according to the charging current value and the available capacity of the battery sent by the battery management system, the alternating current charging mode or the direct current charging mode does not need to be distinguished, the algorithm is simple, the universality is high, the complexity of the algorithm design can be further reduced, and the workload of the testing process is also reduced.
Fig. 5 is a schematic structural diagram of a driving range calculating module in the vehicle driving range calculating device according to the embodiment of the present invention. As shown in fig. 5, the driving range calculation module 14 may specifically include: a range base acquisition unit 141 and a range calculation unit 142.
The range base number obtaining unit 141 is configured to obtain a range base number calculated in a previous cycle. The range calculation unit 142 is configured to calculate a sum of the range base and the range change gradient upper limit threshold as the range.
Alternatively, the driving range calculating unit 142 is configured to calculate the sum of the driving range base and the real-time range variation as the driving range.
It should be noted that the foregoing explanation of the embodiment of the method for calculating the driving range of the vehicle also applies to the device for calculating the driving range of the vehicle of the embodiment, and details are not repeated here.
In order to implement the above embodiment, the present invention further provides another computer device, including: memory, processor and computer program stored on the memory and executable on the processor, which when executing the program, performs the method as provided above.
In order to implement the above embodiments, the present invention also proposes a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method as provided above.
To implement the above embodiments, the present invention also proposes a computer program product, wherein instructions of the computer program product, when executed by a processor, perform the method as provided above.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. 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, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (6)

1. A method for calculating the driving range of an automobile is characterized by comprising the following steps:
according to the charging current value sent by the battery management system, the charging current value is calculated according to the formula
Figure FDA0002235919980000011
Calculating the upper limit threshold of the change gradient of the driving range; wherein D is the upper limit threshold of the variation gradient of the driving range, K is the upper limit correction coefficient of the current, and X is the battery tubeThe charging current value sent by the management system, delta t is charging time, and N is unit energy consumption;
calculating the real-time mileage variation according to the available capacity of the battery sent by the battery management system;
judging whether the real-time mileage variation is larger than the upper limit threshold of the driving mileage variation gradient;
if the judgment result is yes, obtaining the base number of the driving range obtained by calculation in the previous period, and calculating the sum of the base number of the driving range and the upper limit threshold value of the variation gradient of the driving range to be used as the driving range;
if the judgment result is negative, obtaining the driving range base number calculated in the previous period; and calculating the sum of the base number of the driving range and the variable quantity of the real-time range to be used as the driving range.
2. The vehicle driving range calculation method of claim 1, wherein calculating the real-time range change amount according to the available capacity of the battery from the battery management system comprises:
acquiring the available capacity of the battery sent by the battery management system in the previous period;
according to the available capacity of the battery sent by the battery management system, the real-time mileage variation is calculated by the following formula,
Figure FDA0002235919980000012
wherein, Delta S is the real-time mileage variation, N is the unit energy consumption, C1Available capacity of battery, C, from battery management system0The available capacity of the battery from the battery management system in the previous period.
3. An automobile driving range calculation apparatus, comprising:
a driving range change gradient upper limit threshold calculation module used for calculating the charging current value sent by the battery management system according to a formula
Figure FDA0002235919980000013
Calculating the upper limit threshold of the change gradient of the driving range; d is a driving range change gradient upper limit threshold, K is a current upper limit correction coefficient, X is a charging current value sent by a battery management system, delta t is charging time, and N is unit energy consumption;
the real-time mileage variable quantity calculating module is used for calculating the real-time mileage variable quantity according to the available capacity of the battery sent by the battery management system;
the judging module is used for judging whether the real-time mileage variation is larger than the upper limit threshold of the driving range variation gradient;
the driving range calculating module is used for calculating the driving range according to the upper limit threshold value of the variation gradient of the driving range when the judgment result is yes;
the driving range calculating module is also used for calculating the driving range according to the real-time range variation when the judgment result is negative; wherein, the driving range calculation module comprises:
the driving range base number acquiring unit is used for acquiring the driving range base number calculated in the previous period;
the driving range calculating unit is used for calculating the sum of the driving range base number and the driving range change gradient upper limit threshold value to be used as the driving range;
the driving range calculation module comprises:
the driving range base number acquiring unit is used for acquiring the driving range base number calculated in the previous period;
and the driving range calculating unit is used for calculating the sum of the driving range base number and the real-time range variable quantity to be used as the driving range.
4. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of claim 1 or 2 when executing the program.
5. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the method of claim 1 or 2.
6. A computer program product in which instructions, when executed by a processor, perform the method of claim 1 or 2.
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CN109094376B (en) * 2018-08-28 2021-03-23 北京新能源汽车股份有限公司 Driving range calculation method and device
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