CN114407726A - Method, device and equipment for correcting remaining mileage of vehicle and storage medium - Google Patents

Method, device and equipment for correcting remaining mileage of vehicle and storage medium Download PDF

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Publication number
CN114407726A
CN114407726A CN202210071358.8A CN202210071358A CN114407726A CN 114407726 A CN114407726 A CN 114407726A CN 202210071358 A CN202210071358 A CN 202210071358A CN 114407726 A CN114407726 A CN 114407726A
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battery
vehicle
current
electric quantity
remaining
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CN114407726B (en
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聂金泉
高洋洋
黄燕琴
陈晨
王敖
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Hubei University of Arts and Science
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Hubei University of Arts and Science
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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
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • 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
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • 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

Abstract

The invention discloses a method, a device, equipment and a storage medium for correcting remaining mileage of a vehicle, and belongs to the technical field of automobiles. The current temperature and the current electric quantity of a battery in the vehicle are detected in real time in the running process of the vehicle; preheating the battery when the current temperature is smaller than a preset temperature threshold; determining the temperature range of the current temperature, and determining correction parameters according to the temperature range; and obtaining the target electric quantity according to the correction parameters, accurately estimating the energy state of the battery, and calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to dynamically correct the remaining mileage of the vehicle according to the current temperature of the battery and improve the accuracy of calculating the remaining mileage.

Description

Method, device and equipment for correcting remaining mileage of vehicle and storage medium
Technical Field
The invention relates to the technical field of automobiles, in particular to a method, a device, equipment and a storage medium for correcting remaining mileage of a vehicle.
Background
At present, the remaining mileage of a pure electric vehicle is estimated mainly by acquiring an Energy State (SOE) of a power battery, however, an SOE result output by a power battery management system usually has an error, which easily causes inaccuracy of the remaining mileage estimation, and in addition, when a vehicle driving condition, accessory power and a vehicle State change greatly or when a vehicle just enters a driving State and Energy consumption sample points are few, the average Energy consumption fluctuation of the vehicle is large, the remaining mileage estimation result is easily unstable, so that the future driving Energy consumption estimation of the vehicle is inaccurate, the judgment of the remaining mileage is inaccurate, and finally, an error of a predicted value of the driving mileage of the vehicle is caused, and the mileage anxiety of a passenger is caused.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for correcting the remaining mileage of a vehicle, and aims to solve the technical problem that the calculation of the remaining mileage of an electric vehicle in the prior art is inaccurate.
In order to achieve the above object, the present invention provides a remaining mileage correcting method for a vehicle, the method comprising the steps of:
detecting the current temperature and the current electric quantity of a battery in the vehicle in real time in the running process of the vehicle;
preheating the battery when the current temperature is smaller than a preset temperature threshold;
determining the temperature range of the current temperature, and determining correction parameters according to the temperature range;
obtaining target electric quantity according to the correction parameters;
and calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
Optionally, the determining a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range includes:
determining a temperature range in which the current temperature is;
inquiring a preset relation mapping table according to the temperature range to obtain a corresponding energy coefficient consumed in the battery preheating process and a corresponding variable quantity coefficient of the battery discharging efficiency;
and taking the energy coefficient and the variation coefficient as correction parameters.
Optionally, before detecting the current temperature and the current electric quantity of the battery in the vehicle in real time during the running of the vehicle, the method further includes:
collecting a battery heating consumption energy sample and a battery discharging energy sample in the battery preheating process at different temperatures;
obtaining a corresponding energy coefficient consumed in the battery preheating process and a corresponding variable quantity coefficient of the battery discharging efficiency through the consumed energy of the battery and the battery discharging energy;
determining a corresponding temperature range according to the energy coefficient and the variation coefficient;
and establishing a preset mapping relation table based on the mapping relation among the temperature range, the consumed energy coefficient and the variation coefficient.
Optionally, the obtaining the target electric quantity according to the correction parameter includes:
acquiring a battery index matrix, wherein the battery index matrix represents the corresponding relation between battery capacity and current;
calculating the energy consumed by preheating the battery at the last moment;
updating the battery index matrix according to the energy coefficient, the variation coefficient and the energy consumed by preheating the battery at the last moment to obtain a target battery index matrix;
and obtaining the target electric quantity according to the target battery index matrix.
Optionally, obtaining the target electric quantity according to the target battery indicator matrix includes:
determining the battery capacity and current at the current moment according to the target battery index matrix;
acquiring the electric quantity of the battery at the last moment and the integral of the current and the time at the current moment;
and obtaining the target electric quantity according to the battery capacity of the current moment, the electric quantity of the battery at the last moment and the integral of the current and the time at the current moment.
Optionally, the calculating the energy consumed by the battery for preheating at the last moment comprises:
acquiring battery parameters when the battery is preheated, wherein the battery parameters comprise: current, voltage, and resistance;
and calculating the energy consumed by the battery during preheating at the last moment according to the voltage, the current and the resistance.
Optionally, the calculating the remaining mileage of the vehicle according to the target electric quantity to implement the remaining mileage correction of the vehicle includes:
acquiring an average electric quantity consumption value of the vehicle in unit time;
and calculating the remaining driving mileage of the vehicle according to the average electric quantity consumption value and the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
Further, to achieve the above object, the present invention also provides a vehicle remaining mileage correcting apparatus including:
the detection module is used for detecting the current temperature and the current electric quantity of a battery in the vehicle in real time in the running process of the vehicle;
the heating module is used for preheating the battery when the current temperature is lower than a preset temperature threshold value;
the determining module is used for determining the temperature range of the current temperature and determining a correction parameter according to the temperature range;
the acquisition module is used for acquiring target electric quantity according to the correction parameters;
and the calculation module is used for calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
Further, to achieve the above object, the present invention also provides a vehicle remaining mileage correcting apparatus including: a memory, a processor and a vehicle remaining range correction program stored on the memory and operable on the processor, the vehicle remaining range correction program configured to implement the steps of the vehicle remaining range correction method as described above.
Further, to achieve the above object, the present invention also proposes a storage medium having stored thereon a vehicle remaining mileage correcting program which, when executed by a processor, realizes the steps of the vehicle remaining mileage correcting method as described above.
The current temperature and the current electric quantity of a battery in the vehicle are detected in real time in the running process of the vehicle; preheating the battery when the current temperature is smaller than a preset temperature threshold; determining the temperature range of the current temperature, and determining correction parameters according to the temperature range; and obtaining the target electric quantity according to the correction parameters, accurately estimating the energy state of the battery, and calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to dynamically correct the remaining mileage of the vehicle according to the current temperature of the battery and improve the accuracy of calculating the remaining mileage.
Drawings
Fig. 1 is a schematic structural diagram of a vehicle remaining mileage correction apparatus in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a first embodiment of a method for correcting remaining mileage of a vehicle according to the present invention;
FIG. 3 is a flowchart illustrating a remaining mileage correction method of a vehicle according to a second embodiment of the present invention;
FIG. 4 is a flowchart illustrating a third embodiment of a remaining mileage correction method of a vehicle according to the present invention;
FIG. 5 is a schematic overall flowchart of a remaining mileage correction method for a vehicle according to an embodiment of the present invention;
fig. 6 is a block diagram showing the construction of the first embodiment of the remaining mileage correcting apparatus for a vehicle according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle remaining mileage correction apparatus in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the vehicle remaining mileage correcting apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the remaining range correction apparatus for a vehicle, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a vehicle remaining mileage correcting program.
In the vehicle remaining mileage correcting apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the vehicle remaining mileage correcting apparatus of the present invention may be provided in the vehicle remaining mileage correcting apparatus, which calls the vehicle remaining mileage correcting program stored in the memory 1005 by the processor 1001 and executes the vehicle remaining mileage correcting method provided by the embodiment of the present invention.
The embodiment of the invention provides a method for correcting the remaining mileage of a vehicle, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the method for correcting the remaining mileage of the vehicle.
In this embodiment, the method for correcting the remaining mileage of the vehicle includes the steps of:
step S10: and detecting the current temperature and the current electric quantity of a battery in the vehicle in real time during the running process of the vehicle.
It should be understood that the execution subject of the embodiment is the vehicle remaining mileage correction control system, and other devices that can achieve the same or similar functions may also be used, and the embodiment is not limited thereto.
In the specific implementation, the current temperature of the battery determines the discharge capacity of the battery, and the discharge capacities of the battery in different temperature environments are different, so that the temperature of the battery of the vehicle needs to be monitored in real time, and the current temperature of the battery can be detected by arranging a temperature sensor on the surface of the battery. The current electric quantity of the battery refers to the current SOC (State of Charge) of the battery, and the current electric quantity of the battery can be directly obtained through a measurement electric quantity sensor on the battery.
Step S20: and when the current temperature is less than a preset temperature threshold value, preheating the battery.
It should be noted that the preset temperature threshold is a temperature threshold set by an operator in advance, for example, 5 ℃, 10 ℃, and the like, in this embodiment, the 10 ℃ is taken as an example for description, the preheating refers to low-temperature heating of the battery, when the battery is in an excessively low temperature environment, the viscosity of the electrolyte becomes high, the movement of lithium ions is hindered, the migration speed becomes slow, the insertion and extraction of the lithium ions on the surface of the negative electrode of the battery break the equilibrium state, and a part of the lithium ions is deposited on the surface of the negative electrode to cause a lithium precipitation phenomenon, thereby causing the loss of the battery capacity, and the discharged capacity is relatively reduced. The reference test temperature of a common lithium ion battery is 23 +/-5 ℃, and particularly in a cold region in winter, the electric automobile continuously runs in a low-temperature environment, and the driving range of the power battery is obviously reduced. Therefore, when the current temperature of the battery is lower than the preset temperature threshold, the battery needs to be preheated at a low temperature, so that the capacity and the discharge efficiency of the battery are improved.
Step S30: and determining the temperature range of the current temperature, and determining a correction parameter according to the temperature range.
It should be understood that, in the low temperature use of the lithium ion power battery, the energy and power characteristics are more severely attenuated, and the low temperature performance of the lithium ion power battery is characterized in that as the temperature is reduced, the impedance of the power battery is increased, the discharge voltage platform is reduced, and the terminal voltage of the battery is reduced more rapidly, so that the available capacity and power of the battery are greatly attenuated, while when the battery is heated, the battery consumes a part of energy, and meanwhile, as the battery gradually reaches the optimal discharge temperature, the discharge current of the battery is increased, and the battery capacity is changed.
According to research, the discharge capacity of the battery is reduced along with the temperature reduction under the condition of the same discharge cut-off voltage, when the temperature of the battery is increased from-15 ℃ to 0 ℃, the difference value between the discharge capacity of the battery and the standard discharge capacity can reach a, the discharge energy of the battery at 0 ℃ and-15 ℃ is different from the discharge energy of the battery at room temperature, the discharge energy of the battery at 0 ℃ and-15 ℃ is up to b, the difference distance starts to be gradually reduced along with the increase of the temperature, the discharge capacities at the ambient temperatures of 45 ℃ and 25 ℃ are relatively close, in addition, the temperature rise of the lithium ion battery during low-temperature discharge is more obvious than the temperature rise at the high temperature, and the temperature rise of the battery during discharge at the temperature of-15 ℃ to-10 ℃ is larger than the temperature rise in the range of 25 ℃ to 40 ℃. That is, the battery discharge capacity and the energy consumed by the battery temperature rise are different for different temperature ranges.
In specific implementation, correction parameters corresponding to different temperature ranges are different, and the current temperature of the battery needs to be detected in real time, the temperature range to which the battery belongs needs to be determined, and the corresponding correction parameters are obtained according to the corresponding temperature ranges.
Step S40: and obtaining the target electric quantity according to the correction parameters.
It should be understood that the target electric quantity is a corrected electric quantity of the battery, the correction parameters may include an energy coefficient consumed in a battery heating process, a variation coefficient of battery discharge efficiency with temperature rise, and the like, when the temperature ranges are different, the energy coefficient and the variation coefficient in the correction parameters are also different, and the current electric quantity of the battery may be corrected by the correction parameters to obtain the corrected electric quantity of the battery.
Step S50: and calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
In specific implementation, after the corrected electric quantity of the battery is obtained, the remaining driving mileage of the vehicle can be calculated through the corrected electric quantity of the battery to obtain the accurate mileage of the vehicle which can be driven in the remaining state, and the electric quantity of the battery is updated through the current temperature of the battery, so that the remaining mileage of the vehicle is dynamically corrected and estimated based on the updated electric quantity of the battery.
In the embodiment, the current temperature and the current electric quantity of a battery in the vehicle are detected in real time in the running process of the vehicle; preheating the battery when the current temperature is smaller than a preset temperature threshold; determining the temperature range of the current temperature, and determining correction parameters according to the temperature range; and obtaining the target electric quantity according to the correction parameters, accurately estimating the energy state of the battery, and calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to dynamically correct the remaining mileage of the vehicle according to the current temperature of the battery and improve the accuracy of calculating the remaining mileage.
Referring to fig. 3, fig. 3 is a flowchart illustrating a remaining mileage correcting method for a vehicle according to a second embodiment of the present invention.
Based on the first embodiment, the step S30 of the method for correcting remaining mileage of a vehicle according to the present embodiment specifically includes:
step S301: determining a temperature range in which the current temperature is located.
It should be understood that, according to a large number of previous experiments and observations, the temperature of the battery is divided into three ranges, i.e., an ultra-low temperature ranging from-15 ℃ to-10 ℃, a low temperature ranging from 0 ℃ to 10 ℃, and an optimum temperature ranging from 10 ℃ to 30 ℃.
After the current temperature of the battery is obtained through the temperature sensor, the temperature range where the current temperature is located can be determined according to the current temperature value of the battery, for example, the current temperature of the battery is-5 ℃, and then the current temperature can be determined to belong to ultralow temperature.
Step S302: and inquiring a preset relation mapping table according to the temperature range to obtain the corresponding energy coefficient consumed in the battery preheating process and the variation coefficient of the battery discharging efficiency.
It should be noted that the preset relationship mapping table is a corresponding relationship table between the temperature range and the energy coefficient and the variation coefficient, which is established after the user collects a large number of temperature samples and the corresponding discharge efficiency data and energy consumption data of the battery according to the previous period.
Further, before step S10, a preset mapping table may be established according to the collected different temperatures, where: collecting a battery heating consumption energy sample and a battery discharging energy sample in the battery preheating process at different temperatures; obtaining a corresponding energy coefficient consumed in the battery preheating process and a corresponding variable quantity coefficient of the battery discharging efficiency through the consumed energy of the battery and the battery discharging energy; determining a corresponding temperature range according to the energy coefficient and the variation coefficient; and establishing a preset mapping relation table based on the mapping relation among the temperature range, the consumed energy coefficient and the variation coefficient.
It should be understood that, when the battery is preheated, the energy consumed during heating at different temperatures and the discharge efficiency are different, so that the energy samples consumed during preheating the battery at different temperatures and the discharge energy samples can be collected, and the energy coefficient eta consumed during preheating the battery can be obtained through the energy consumed during heating the battery and the energy discharged by the batteryiAnd a coefficient of variation λ of battery discharge efficiency with temperature risejDifferent energy coefficient ηiAnd coefficient of variation λjThe corresponding temperatures are different, and the energy coefficient eta can be usediAnd coefficient of variation λjDetermining corresponding temperature range, and calculating energy coefficient eta according to the temperature rangeiAnd coefficient of variation λjThe mapping relationship between them establishes a preset mapping relationship table, as shown in table 1, where table 1 is the preset mapping relationship table, where η1And λ1Corrected parameter, η, for the temperature of the battery at ultra-low temperatures2And λ2Is a correction parameter, eta, at low temperature of the battery3And λ3The corrected parameter is the temperature of the battery at the proper temperature.
TABLE 1 Preset mapping relationship Table
ηi λj
Ultra-low temperatures -15℃－-10℃ η1 λ1
Low temperature 0℃－10℃ η2 λ2
Suitable temperature 10℃－30℃ η3 λ3
Step S303: and taking the energy coefficient and the variation coefficient as correction parameters.
It should be noted that, after the preset mapping table is established according to the temperature range, the energy coefficient and the variation coefficient in different temperature ranges can be obtained, and the energy coefficient and the variation coefficient are used as the correction parameters.
The embodiment determines the temperature range of the current temperature; inquiring a preset relation mapping table according to the temperature range to obtain a corresponding energy coefficient consumed in the battery preheating process and a corresponding variable quantity coefficient of the battery discharging efficiency; and taking the energy coefficient and the variation coefficient as correction parameters, and obtaining different correction parameters through the condition that the battery is at different temperatures, so that the current electric quantity of the battery can be calculated more accurately.
Referring to fig. 4, fig. 4 is a flowchart illustrating a remaining mileage correcting method of a vehicle according to a third embodiment of the present invention.
Based on the first and second embodiments, step S40 of the third embodiment of the method for correcting remaining mileage of a vehicle according to the present invention specifically includes:
step S401: and acquiring a battery index matrix, wherein the battery index matrix represents the corresponding relation between the battery capacity and the current.
It should be understood that, due to different temperatures, the correction parameters will change, and different correction parameters will affect all indexes of the battery performance, so the index data of the battery can be generated into a battery index matrix, the battery index matrix has the capacity of the battery, the voltage of the battery, the current of the battery and the resistance of the battery, a battery index matrix A is generated according to the battery indexes of the capacity, the voltage, the current and the resistance, and a battery index matrix A is generated according to the battery indexes of the capacity, the voltage, the current and the resistance
Figure BDA0003482657280000091
V is the battery voltage, I is the battery current, C is the battery capacity, and R is the battery resistance.
Step S402: and calculating the energy consumed by preheating the battery at the last moment.
In a specific implementation, the energy consumed by the battery for preheating at the last time is energy consumption of the battery itself when the current temperature of the battery is lower than a preset temperature threshold, in the battery preheating process, the battery itself may consume a part of energy, and the part of energy should not participate in estimation of the remaining energy of the battery, because the energy consumed in heating is different due to different heating methods and heating times, the energy consumed in the battery preheating process needs to be calculated and updated in real time, in the battery preheating process, a battery parameter during battery preheating can be obtained, wherein the battery parameter includes: current, voltage, and resistance; calculating the energy consumed by preheating the battery at the last moment according to the voltage, the current and the resistance, as shown in the following formula 1, wherein the energy consumed by preheating the battery at the last moment is calculated as follows:
Q＝∫I2rdt +. Integral (IU) (t) dt (formula 1)
In formula 1, Q is energy consumed by preheating the battery at a previous time, I is current when the battery is heated, R is resistance when the battery is heated, and U is voltage when the battery is heated. By the above formula 1, the energy consumed by the battery itself in the preheating process at the last moment can be obtained.
Step S403: and updating the battery index matrix through the energy coefficient, the variation coefficient and the energy consumed by preheating the battery at the last moment to obtain a target battery index matrix.
It should be understood that the target battery index matrix is an index matrix obtained by updating the battery index matrix according to the current temperature range of the battery and the correction parameters, and the correction parameters can update the battery performance to obtain the target battery index matrix, and the specific calculation process is as follows:
B＝λjA-ηiq (formula 2)
In formula 2, B is the target cell index matrix, λjFor coefficient of variation, A is the cell index matrix, ηiFor energy factor, Q is the energy consumed by the battery to preheat at the previous time.
Step S404: and obtaining the target electric quantity according to the target battery index matrix.
It should be noted that the target electric quantity is an electric quantity obtained by updating the current electric quantity of the battery, that is, the current electric quantity is updated by the energy consumed in the battery heating process, so as to obtain the target electric quantity. Updating the battery parameters in the battery indexes by the formula 2 to obtain the corrected battery parameters and obtain a target battery index matrix.
Further, the step of obtaining the target current according to the target battery index matrix is as follows: determining the battery capacity and current at the current moment according to the target battery index matrix; acquiring the electric quantity of the battery at the last moment and the integral of the current and the time at the current moment; and obtaining the target electric quantity according to the battery capacity of the current moment, the electric quantity of the battery at the last moment and the integral of the current and the time at the current moment. The calculation process of the target electric quantity is as follows:
Figure BDA0003482657280000101
in formula 3, SOC (k) is the target electric quantity of the battery, SOC (k-1) is the last electric quantity of the battery, I × δ t is the integral of the current and time at the present time, C is the battery capacity at the present time, and the target electric quantity of the battery is calculated by formula 3.
It should be understood that, when the target electric quantity of the battery is obtained, the remaining driving mileage of the vehicle can be calculated according to the target electric quantity, and then the average electric quantity consumption value of the vehicle in unit time can be obtained; and calculating the remaining driving mileage of the vehicle according to the average electric quantity consumption value and the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
It should be noted that the average power consumption value of the vehicle in a unit time refers to an average value obtained by calculating the power consumption value of the vehicle in a period of time according to the battery capacity at the current time, and the remaining mileage of the vehicle is calculated as follows:
Figure BDA0003482657280000102
in equation 4, L is the remaining mileage of the vehicle, SOC (k) is the target electric quantity of the battery, SOCavgThe remaining driving mileage of the vehicle can be calculated according to the formula 4, and the calculation is accurate and quick.
In the embodiment, a battery index matrix is obtained, and the battery index matrix represents the corresponding relation between the battery capacity and the current; calculating the energy consumed by preheating the battery at the last moment; updating the battery index matrix according to the energy coefficient, the variation coefficient and the energy consumed by preheating the battery at the last moment to obtain a target battery index matrix; and obtaining the target electric quantity according to the target battery index matrix. The target electric quantity is obtained by calculating the energy consumed by heating the battery and estimating the residual energy of the battery again according to the energy consumed by heating, the residual mileage of the vehicle is corrected in real time through the target electric quantity, and the residual mileage of the vehicle is accurately calculated.
As shown in fig. 5, fig. 5 is a schematic overall flow chart of the vehicle remaining mileage correction method according to the present invention. The temperature of the battery is detected in real time through a temperature sensor, whether the current temperature of the battery is smaller than a preset temperature threshold value by 10 ℃ or not is judged, when the temperature of the battery is smaller than 10 ℃, a battery preheating system is started to preheat the battery, the temperature of the battery is continuously detected in the heating process, in the battery preheating process, the consumed energy of the battery in the heating process is calculated through parameters of current, voltage and resistance in the heating process, the temperature range of the battery is determined according to the temperature of the battery, the change of the battery discharging efficiency is calculated through the temperature range, and corresponding correction parameters are obtained. And correcting the current electric quantity of the battery through the correction parameters to obtain a target electric quantity, calculating the remaining mileage of the vehicle according to the target electric quantity, and outputting a calculation result. The battery capacity is updated by considering the temperature and the energy consumed by heating the battery, so that the accuracy of calculating the remaining mileage of the vehicle is improved.
Referring to fig. 6, fig. 6 is a block diagram illustrating a configuration of a first embodiment of a remaining mileage correcting apparatus for a vehicle according to the present invention.
As shown in fig. 6, a remaining mileage correction apparatus for a vehicle according to an embodiment of the present invention includes:
the detection module 10 is used for detecting the current temperature and the current electric quantity of a battery in the vehicle in real time in the running process of the vehicle.
And the heating module 20 is configured to preheat the battery when the current temperature is less than a preset temperature threshold.
And the determining module 30 is configured to determine a temperature range in which the current temperature is located, and determine a correction parameter according to the temperature range.
And the obtaining module 40 is used for obtaining the target electric quantity according to the correction parameter.
And the calculating module 50 is used for calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
In the embodiment, the current temperature and the current electric quantity of a battery in the vehicle are detected in real time in the running process of the vehicle; preheating the battery when the current temperature is smaller than a preset temperature threshold; determining the temperature range of the current temperature, and determining correction parameters according to the temperature range; and obtaining the target electric quantity according to the correction parameters, accurately estimating the energy state of the battery, and calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to correct the remaining mileage of the vehicle and improve the accuracy of calculating the remaining mileage.
In an embodiment, the determining module 30 is further configured to determine a temperature range in which the current temperature is located; inquiring a preset relation mapping table according to the temperature range to obtain a corresponding energy coefficient consumed in the battery preheating process and a corresponding variable quantity coefficient of the battery discharging efficiency; and taking the energy coefficient and the variation coefficient as correction parameters.
In an embodiment, the detection module 10 is further configured to collect samples of consumed energy of battery heating and samples of discharged energy of battery during the battery preheating process at different temperatures; obtaining a corresponding energy coefficient consumed in the battery preheating process and a corresponding variable quantity coefficient of the battery discharging efficiency through the consumed energy of the battery and the battery discharging energy; determining a corresponding temperature range according to the energy coefficient and the variation coefficient; and establishing a preset mapping relation table based on the mapping relation among the temperature range, the consumed energy coefficient and the variation coefficient.
In an embodiment, the obtaining module 40 is further configured to obtain a battery indicator matrix, where the battery indicator matrix represents a corresponding relationship between battery capacity and current; calculating the energy consumed by preheating the battery at the last moment; updating the battery index matrix according to the energy coefficient, the variation coefficient and the energy consumed by preheating the battery at the last moment to obtain a target battery index matrix; and obtaining the target electric quantity according to the target battery index matrix.
In an embodiment, the obtaining module 40 is further configured to determine the battery capacity and the current at the current moment according to the target battery indicator matrix; acquiring the electric quantity of the battery at the last moment and the integral of the current and the time at the current moment; and obtaining the target electric quantity according to the battery capacity of the current moment, the electric quantity of the battery at the last moment and the integral of the current and the time at the current moment.
In an embodiment, the obtaining module 40 is further configured to obtain a battery parameter when the battery is preheated, where the battery parameter includes: current, voltage, and resistance; and calculating the energy consumed by the battery during preheating at the last moment according to the voltage, the current and the resistance.
In an embodiment, the calculating module 50 is further configured to obtain an average power consumption value of the vehicle per unit time; and calculating the remaining driving mileage of the vehicle according to the average electric quantity consumption value and the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
Further, to achieve the above object, the present invention also provides a vehicle remaining mileage correcting apparatus including: a memory, a processor and a vehicle remaining range correction program stored on the memory and operable on the processor, the vehicle remaining range correction program configured to implement the steps of the vehicle remaining range correction method as described above.
Since the vehicle remaining mileage correcting device adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
Furthermore, an embodiment of the present invention further provides a storage medium, in which a vehicle remaining mileage correcting program is stored, and the vehicle remaining mileage correcting program, when executed by a processor, implements the steps of the vehicle remaining mileage correcting method as described above.
Since the storage medium adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not elaborated in the embodiment may refer to the method for correcting the remaining mileage of the vehicle provided by any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A remaining mileage correcting method for a vehicle, comprising:
detecting the current temperature and the current electric quantity of a battery in the vehicle in real time in the running process of the vehicle;
preheating the battery when the current temperature is smaller than a preset temperature threshold;
determining the temperature range of the current temperature, and determining correction parameters according to the temperature range;
obtaining target electric quantity according to the correction parameters;
and calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
2. The vehicle remaining mileage correction method according to claim 1, wherein the determining a temperature range in which the current temperature is, and determining a correction parameter based on the temperature range, comprises:
determining a temperature range in which the current temperature is;
inquiring a preset relation mapping table according to the temperature range to obtain a corresponding energy coefficient consumed in the battery preheating process and a corresponding variable quantity coefficient of the battery discharging efficiency;
and taking the energy coefficient and the variation coefficient as correction parameters.
3. The method for correcting the remaining mileage of a vehicle according to claim 1, wherein before detecting the current temperature and the current amount of electricity of the battery in the vehicle in real time during the running of the vehicle, the method further comprises:
collecting a battery heating consumption energy sample and a battery discharging energy sample in the battery preheating process at different temperatures;
obtaining a corresponding energy coefficient consumed in the battery preheating process and a corresponding variable quantity coefficient of the battery discharging efficiency through the consumed energy of the battery and the battery discharging energy;
determining a corresponding temperature range according to the energy coefficient and the variation coefficient;
and establishing a preset mapping relation table based on the mapping relation among the temperature range, the consumed energy coefficient and the variation coefficient.
4. The method for correcting the remaining mileage of a vehicle according to claim 2, wherein the obtaining of the target electric quantity based on the correction parameter includes:
acquiring a battery index matrix, wherein the battery index matrix represents the corresponding relation between battery capacity and current;
calculating the energy consumed by preheating the battery at the last moment;
updating the battery index matrix according to the energy coefficient, the variation coefficient and the energy consumed by preheating the battery at the last moment to obtain a target battery index matrix;
and obtaining the target electric quantity according to the target battery index matrix.
5. The method for correcting remaining vehicle mileage according to claim 4, wherein the obtaining a target electric quantity according to the target battery index matrix includes:
determining the battery capacity and current at the current moment according to the target battery index matrix;
acquiring the electric quantity of the battery at the last moment and the integral of the current and the time at the current moment;
and obtaining the target electric quantity according to the battery capacity of the current moment, the electric quantity of the battery at the last moment and the integral of the current and the time at the current moment.
6. The vehicle remaining mileage correction method according to claim 4, wherein the calculating of the energy consumed by the battery for preheating at a time includes:
acquiring battery parameters when the battery is preheated, wherein the battery parameters comprise: current, voltage, and resistance;
and calculating the energy consumed by the battery during preheating at the last moment according to the voltage, the current and the resistance.
7. The vehicle remaining range correction method according to any one of claims 1 to 6, wherein the calculating the remaining range of the vehicle according to the target electric quantity to achieve the correction of the vehicle remaining range includes:
acquiring an average electric quantity consumption value of the vehicle in unit time;
and calculating the remaining driving mileage of the vehicle according to the average electric quantity consumption value and the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
8. A remaining mileage correcting device for a vehicle, characterized by comprising:
the detection module is used for detecting the current temperature and the current electric quantity of a battery in the vehicle in real time in the running process of the vehicle;
the heating module is used for preheating the battery when the current temperature is lower than a preset temperature threshold value;
the determining module is used for determining the temperature range of the current temperature and determining a correction parameter according to the temperature range;
the acquisition module is used for acquiring target electric quantity according to the correction parameters;
and the calculation module is used for calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to realize the correction of the remaining mileage of the vehicle.
9. A remaining mileage correcting apparatus for a vehicle, characterized by comprising: a memory, a processor, and a vehicle remaining range correction program stored on the memory and operable on the processor, the vehicle remaining range correction program configured to implement the vehicle remaining range correction method of any one of claims 1 to 7.
10. A storage medium having a vehicle remaining-mileage correcting program stored thereon, which when executed by a processor implements a vehicle remaining-mileage correcting method according to any one of claims 1 to 7.
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