CN114407726B - Vehicle remaining mileage correction method, device, equipment and storage medium - Google Patents

Vehicle remaining mileage correction method, device, equipment and storage medium Download PDF

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CN114407726B
CN114407726B CN202210071358.8A CN202210071358A CN114407726B CN 114407726 B CN114407726 B CN 114407726B CN 202210071358 A CN202210071358 A CN 202210071358A CN 114407726 B CN114407726 B CN 114407726B
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battery
vehicle
current
energy
electric quantity
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CN114407726A (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

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a vehicle remaining mileage correction method, device, equipment and storage medium, and belongs to the technical field of automobiles. The invention detects the current temperature and the current electric quantity of the battery in the vehicle in real time in the running process of the vehicle; when the current temperature is smaller than a preset temperature threshold value, preheating the battery; determining a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range; and obtaining a 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

Vehicle remaining mileage correction method, device, equipment 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 the residual mileage of a vehicle.
Background
At present, the estimation of the residual mileage of the pure electric vehicle is mainly achieved by acquiring the Energy State of a power battery (SOE), however, the SOE result output by a power battery management system usually has errors, which easily cause the inaccuracy of the residual mileage estimation.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a vehicle remaining mileage correcting method, device, equipment and storage medium, 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 vehicle remaining mileage correcting method, comprising the steps of:
detecting the current temperature and the current electric quantity of a battery in a vehicle in real time in the running process of the vehicle;
when the current temperature is smaller than a preset temperature threshold value, preheating the battery;
determining a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range;
obtaining a 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 driving mileage of the vehicle.
Optionally, the determining the temperature range in which the current temperature is located, determining the correction parameter according to the temperature range, includes:
determining 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.
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 according to the consumed energy of the battery and the battery discharging energy;
determining a corresponding temperature range through 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 variable quantity 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 the battery capacity and the current;
calculating the energy consumed by preheating at the last moment of the battery;
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;
and obtaining the target electric quantity according to the target battery index matrix.
Optionally, the obtaining the target electric quantity according to the target battery index matrix includes:
determining the battery capacity and the 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 current and time at the current moment;
and obtaining the target electric quantity according to the battery capacity at the current moment, the electric quantity at the last moment of the battery and the integral of the current and time at the current moment.
Optionally, the calculating the energy consumed by preheating the battery at a time includes:
obtaining battery parameters during preheating of the battery, wherein the battery parameters comprise: current, voltage and resistance;
and calculating the energy consumed by preheating the battery at one moment according to the voltage, the current and the resistance.
Optionally, the calculating the remaining driving range of the vehicle according to the target electric quantity to implement the remaining driving range 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 driving mileage of the vehicle.
In addition, in order to achieve the above object, the present invention also provides a vehicle remaining mileage correcting apparatus, comprising:
the detection module is used for detecting the current temperature and the current electric quantity of the 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 smaller than a preset temperature threshold value;
the determining module is used for determining a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range;
the acquisition module is used for acquiring the 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 driving mileage of the vehicle.
In addition, in order to achieve the above object, the present invention also proposes a vehicle remaining mileage correcting apparatus including: a memory, a processor, and a vehicle remaining mileage modification program stored on the memory and operable on the processor, the vehicle remaining mileage modification program configured to implement the steps of the vehicle remaining mileage modification method as described above.
In addition, in order 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, implements the steps of the vehicle remaining mileage correcting method as described above.
The invention detects the current temperature and the current electric quantity of the battery in the vehicle in real time in the running process of the vehicle; when the current temperature is smaller than a preset temperature threshold value, preheating the battery; determining a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range; and obtaining a 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 diagram of a vehicle remaining mileage correcting apparatus in a hardware running environment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a vehicle mileage correcting method according to a first embodiment of the present invention;
FIG. 3 is a flowchart of a second embodiment of a vehicle mileage correcting method according to the present invention;
FIG. 4 is a flowchart of a third embodiment of a vehicle mileage correcting method according to the present invention;
FIG. 5 is a schematic general flow chart of an embodiment of a vehicle mileage correcting method according to the present invention;
fig. 6 is a block diagram showing the construction of a first embodiment of the vehicle mileage correcting apparatus according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a vehicle remaining mileage correcting device in a hardware running 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 (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further 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 high-speed random access Memory (Random Access Memory, RAM) Memory or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the configuration shown in fig. 1 does not constitute a limitation of the vehicle remaining mileage correcting apparatus, and may include more or less components than those illustrated, or may combine certain components, or may be a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a vehicle remaining mileage correcting program may be included in the memory 1005 as one type of storage medium.
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 in the vehicle remaining mileage correcting apparatus of the present invention may be provided in the vehicle remaining mileage correcting apparatus, which invokes the vehicle remaining mileage correcting program stored in the memory 1005 through 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 vehicle remaining mileage correcting method, referring to fig. 2, fig. 2 is a flow chart of a first embodiment of the vehicle remaining mileage correcting method of the invention.
In this embodiment, the vehicle remaining mileage correcting method includes the following steps:
step S10: during the running process of the vehicle, the current temperature and the current electric quantity of the battery in the vehicle are detected in real time.
It should be understood that the execution body of the present embodiment is a vehicle remaining mileage correction control system, and may be other devices that can implement the same or similar functions, which is not limited in this embodiment.
In a specific implementation, the current temperature of the battery determines the discharge capacity of the battery, and the discharge capacities of the battery are different in different temperature environments, 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 through a temperature sensor arranged on the surface of the battery. The current electric quantity of the battery refers to the current State of Charge (SOC) of the battery, and the current electric quantity of the battery can be obtained directly through a measurement electric quantity sensor on the battery.
Step S20: and preheating the battery when the current temperature is smaller than a preset temperature threshold value.
It should be noted that, the preset temperature threshold is a temperature threshold set by a worker in advance, for example, 5 ℃, 10 ℃, and the like, and the embodiment uses 10 ℃ as an example to illustrate that the battery is heated at a low temperature, and when the battery is in an environment with too low temperature, the viscosity of the electrolyte is increased, the movement of lithium ions is blocked, the migration speed is slow, the intercalation and deintercalation of lithium ions on the surface of the negative electrode of the battery break the equilibrium state, and a part of lithium ions are deposited on the surface of the negative electrode to cause the phenomenon of lithium precipitation, so that the capacity loss of the battery is caused, and the discharged capacity is relatively reduced. The reference test temperature of the common lithium ion battery is 23+/-5 ℃, and particularly in the alpine region in winter, the electric automobile continuously runs in a low-temperature environment, and the driving mileage of the power battery can be obviously reduced. Therefore, when the current temperature of the battery is less 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 a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range.
It should be understood that in low temperature use of a lithium ion power battery, the energy and power characteristics decay more severely, the low temperature performance of the battery is shown by that as the temperature decreases, the impedance of the power battery increases, the discharge voltage plateau decreases, and the terminal voltage of the battery decreases faster, resulting in a large decay in available capacity and power, while when the battery heats up, the battery consumes a portion of the energy, and at the same time, as the battery gradually reaches the optimal discharge temperature, its discharge current increases, and the battery power changes accordingly.
It is found that under the same discharge cut-off voltage condition, the discharge capacity of the battery can be reduced along with the reduction of temperature, when the battery is increased from-15 ℃ to 0 ℃, the difference between the discharge energy of the battery and the standard discharge capacity can reach a, the discharge energy of the battery at 0 ℃ and the discharge energy of the battery at-15 ℃ are different from the discharge energy of the battery at room temperature, the discharge energy of the battery at 0 ℃ is higher than the discharge energy of the battery at-15 ℃ and the discharge energy of the battery at-15 ℃ reaches b, the gap starts to be gradually reduced along with the increase of temperature, the discharge capacities of the battery at 45 ℃ and the environment temperature of 25 ℃ are relatively close, in addition, the temperature rise of the lithium ion battery at low temperature discharge is more obvious than the temperature rise of the battery at-15 ℃ to-10 ℃ in the discharge process, and the temperature rise of the battery at the discharge process is more than the temperature rise of the battery at 25 ℃ to 40 ℃. That is, the battery discharge capacity is different from the energy consumed by the battery to heat up for different temperature ranges.
In a specific implementation, the correction parameters corresponding to different temperature ranges are also different, the current temperature of the battery needs to be detected in real time, the temperature range to which the current temperature belongs is 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 the electric quantity after the battery is corrected, the correction parameters can include an energy coefficient consumed in the battery heating process, a variation coefficient of the battery discharging efficiency along with the 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 can be corrected through the correction parameters, so that the electric quantity after the battery is corrected.
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 driving mileage of the vehicle.
In a 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 an accurate remaining driving mileage of the vehicle, 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 the battery in the vehicle are detected in real time in the running process of the vehicle; when the current temperature is smaller than a preset temperature threshold value, preheating the battery; determining a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range; and obtaining a 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 second embodiment of a vehicle remaining mileage correcting method according to the present invention.
Based on the above-mentioned first embodiment, the step S30 of the vehicle remaining mileage correcting method of the present embodiment specifically includes:
step S301: and determining the temperature range in which the current temperature is located.
It should be understood that according to a great deal of experiments and observations in the early stage, the temperature of the battery is divided into three ranges, namely ultralow temperature and low temperature suitable temperature, the ultralow temperature range is-15 ℃ to-10 ℃, the low temperature range is 0 ℃ to 10 ℃, and the temperature suitable temperature range is 10 ℃ to 30 ℃.
After the current temperature of the battery is obtained through the temperature sensor, the temperature range of the current temperature can be determined according to the current temperature value of the battery, for example, the current temperature of the battery is-5 ℃, and the current temperature can be determined to be ultra-low temperature.
Step S302: and 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 variation coefficient of the battery discharging efficiency.
It should be noted that, the preset relation mapping table is a corresponding relation table between the established temperature range and the energy coefficient and the variation coefficient after the user collects a large number of temperature samples and corresponding discharge efficiency data and consumption energy data of the battery according to the previous period.
Further, before step S10, a preset mapping table may be established according to different temperatures, and the following are: 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 according to the consumed energy of the battery and the battery discharging energy; determining a corresponding temperature range through 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 variable quantity coefficient.
It should be understood that the energy consumed by the battery during the preheating at different temperatures and the discharge efficiency are different, so that the energy sample consumed by the battery during the preheating at different temperatures and the discharge energy sample can be collected, and the energy coefficient eta consumed during the preheating process of the battery can be obtained by the energy consumed by the battery during the heating and the energy discharged by the battery i And a variation coefficient lambda of the battery discharge efficiency with temperature rise j Different energy coefficients eta i And a coefficient of variation lambda j The corresponding temperatures are different, and the energy coefficient eta can be used i And a coefficient of variation lambda j Determining the corresponding temperature range and according to the temperature range and the energy coefficient eta i Coefficient of variation lambda j The mapping relation between the two is established into a preset mapping relation table, as shown in table 1, table 1 is the preset mapping relation table, wherein eta 1 And lambda (lambda) 1 Is the correction parameter eta when the temperature of the battery is at ultra-low temperature 2 And lambda (lambda) 2 Is a correction parameter, eta, of the battery when the temperature is low 3 And lambda (lambda) 3 Is a correction parameter when the temperature of the battery is at an appropriate temperature.
TABLE 1 preset mapping table
η i λ j
Ultralow temperature -15℃－-10℃ η 1 λ 1
Low temperature 0℃－10℃ η 2 λ 2
Suitable for temperature 10℃－30℃ η 3 λ 3
Step S303: and taking the energy coefficient and the variation coefficient as correction parameters.
It should be noted that, after the preset mapping relation 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 correction parameters.
The embodiment determines the 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, and obtaining different correction parameters through the fact 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 third embodiment of a vehicle remaining mileage correcting method according to the present invention.
Based on the first and second embodiments, the step S40 of the third embodiment of the vehicle remaining mileage correcting method 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, since the temperature is different, the correction parameters will also change, and different correction parameters will affect all the indicators of the battery performance, the indicator data of the battery can be generated into a battery indicator matrix, and the battery indicator matrix A are generated according to the battery indicators of the capacity, the voltage, the current and the resistance, wherein the battery indicator matrix includes the capacity of the battery, the voltage of the battery, the current of the battery and the resistanceV is the battery voltage, I is the battery current, C is the battery capacity, and R is the battery resistance.
Step S402: the energy consumed by preheating the battery at the previous time is calculated.
In a specific implementation, when the current temperature of the battery is lower than a preset temperature threshold, the energy consumed by preheating the battery is the energy consumed by the battery itself, and in the preheating process of the battery, the battery itself consumes a part of energy, and the part of energy should not participate in the residual energy estimation of the battery, and because the heating method and the heating time are different, the consumed energy in the heating process is also different, so that the consumed energy in the preheating process of the battery needs to be calculated and updated in real time, and in the preheating process of the battery, the battery parameters in the preheating process of the battery can be obtained, wherein the battery parameters include: current, voltage and resistance; the energy consumed by preheating the battery at one moment is calculated according to the voltage, the current and the resistance, as shown in the following formula 1, and the energy consumed by preheating the battery at one moment is calculated as follows:
Q＝∫I 2 rdt++ IU (t) dt (formula 1)
In formula 1, Q is the energy consumed by preheating the battery at one time, I is the current when the battery is heated, R is the resistance when the battery is heated, and U is the voltage when the battery is heated. The energy consumed by the battery itself in the preheating process at one time can be obtained by the above equation 1.
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 updated according to the current temperature range of the battery and the correction parameters, the correction parameters can update the battery performance to obtain the target battery index matrix, and the specific calculation process is as follows in formula 2:
B＝λ j A-η i q (2)
In the formula 2, B is a target battery index matrix lambda j A is battery index matrix, eta, which is the coefficient of variation i And Q is the energy consumed by preheating the battery at one moment, and is the energy coefficient.
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 after updating the current electric quantity of the battery, that is, the energy consumed in the battery heating process updates the current electric quantity to obtain the target electric quantity. Updating the battery parameters in the battery indexes by the formula 2 to obtain 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 the 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 current and time at the current moment; and obtaining the target electric quantity according to the battery capacity at the current moment, the electric quantity at the last moment of the battery and the integral of the current and time at the current moment. The calculation process of the target electric quantity is as follows:
in the formula 3, the SOC (k) is the target electric quantity of the battery, the electric quantity of the SOC (k-1) at the last time of the battery, i×δt is the integral of the current and time at the current time, C is the battery capacity at the current time, and the target electric quantity of the battery is obtained through the formula 3.
It should be understood that, after 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 driving 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 moment, and the remaining mileage calculation process of the vehicle is as follows formula 4:
in equation 4, L is the remaining mileage of the vehicle, SOC (k) is the target power of the battery, and SOC avg The 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, wherein the battery index matrix represents the corresponding relation between the battery capacity and the current; calculating the energy consumed by preheating at the last moment of the battery; 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; and obtaining the target electric quantity according to the target battery index matrix. The energy consumed by the self heating of the battery is calculated, the residual energy of the battery is estimated again according to the energy consumed by the self heating, the target electric quantity is obtained, the real-time correction of the residual mileage of the vehicle is realized through the target electric quantity, and the calculation of the residual mileage of the vehicle is accurate.
Fig. 5 is a schematic overall flow chart of the vehicle remaining mileage correcting method according to the present invention, as shown in fig. 5. The temperature sensor is used for detecting the temperature of the battery in real time, judging whether the current temperature of the battery is lower than a preset temperature threshold value of 10 ℃, when the temperature of the battery is lower than 10 ℃, starting a battery preheating system, preheating the battery, continuously detecting the temperature of the battery in the heating process, calculating the consumed energy of the battery in the heating process by obtaining the parameters of current, voltage and resistance in the heating process, determining the temperature range of the battery according to the temperature of the battery, and calculating the change of the discharge efficiency of the battery through the temperature range to obtain corresponding correction parameters. And correcting the current electric quantity of the battery through the correction parameters to obtain target electric quantity, calculating the remaining mileage of the vehicle according to the target electric quantity, and outputting a calculation result. The temperature and the energy consumed by the self heating of the battery are considered, so that the electric quantity of the battery is updated, and the accuracy of calculating the remaining mileage of the vehicle is improved.
Referring to fig. 6, fig. 6 is a block diagram showing the construction of a first embodiment of the vehicle mileage correcting apparatus according to the present invention.
As shown in fig. 6, the vehicle remaining mileage correcting apparatus according to the embodiment of the present invention includes:
the detection module 10 is used for detecting the current temperature and the current electric quantity of the battery in the vehicle in real time during the running process of the vehicle.
And the heating module 20 is used for preheating the battery when the current temperature is smaller than a preset temperature threshold value.
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 an obtaining module 40, configured to obtain a 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 driving mileage of the vehicle.
In the embodiment, the current temperature and the current electric quantity of the battery in the vehicle are detected in real time in the running process of the vehicle; when the current temperature is smaller than a preset temperature threshold value, preheating the battery; determining a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range; and obtaining a 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 the calculation of 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 one embodiment, the detection module 10 is further configured to collect a battery heating consumption energy sample and a battery discharging energy sample 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 according to the consumed energy of the battery and the battery discharging energy; determining a corresponding temperature range through 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 variable quantity coefficient.
In an embodiment, the obtaining module 40 is further configured to obtain a battery indicator matrix, where the battery indicator matrix represents a correspondence between a battery capacity and a current; calculating the energy consumed by preheating at the last moment of the battery; 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; 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 a battery capacity and a current at a current time according to the target battery indicator matrix; acquiring the electric quantity of the battery at the last moment and the integral of current and time at the current moment; and obtaining the target electric quantity according to the battery capacity at the current moment, the electric quantity at the last moment of the battery and the integral of the current and 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 preheating the battery at one moment according to the voltage, the current and the resistance.
In one embodiment, the calculating module 50 is further configured to obtain an average power consumption value of the vehicle in a 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 driving mileage of the vehicle.
In addition, in order to achieve the above object, the present invention also proposes a vehicle remaining mileage correcting apparatus including: a memory, a processor, and a vehicle remaining mileage modification program stored on the memory and operable on the processor, the vehicle remaining mileage modification program configured to implement the steps of the vehicle remaining mileage modification method as described above.
The vehicle remaining mileage correcting device adopts all the technical schemes of all the embodiments, so that the vehicle remaining mileage correcting device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium is stored with a vehicle remaining mileage correcting program, and the vehicle remaining mileage correcting program realizes the steps of the vehicle remaining mileage correcting method when being executed by a processor.
Because the storage medium adopts all the technical schemes of all the embodiments, the storage medium has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted here.
It should be understood that the foregoing is illustrative only and is not limiting, and that in specific applications, those skilled in the art may set the invention as desired, and the invention is not limited thereto.
It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.
In addition, technical details not described in detail in the present embodiment may refer to the vehicle remaining mileage correction method provided in any embodiment of the present invention, which is not described herein.
Furthermore, it should 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 one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (8)

1. The vehicle remaining mileage correcting method is characterized by comprising the following steps:
detecting the current temperature and the current electric quantity of a battery in a vehicle in real time in the running process of the vehicle;
when the current temperature is smaller than a preset temperature threshold value, preheating the battery;
determining a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range;
obtaining a target electric quantity according to the correction parameters;
calculating the remaining driving mileage of the vehicle according to the target electric quantity so as to realize the correction of the remaining driving mileage of the vehicle;
before detecting the current temperature and the current electric quantity of the battery in the vehicle in real time in the running process of the vehicle, the method further comprises the following steps:
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 battery discharging efficiency according to the consumed energy and battery discharging energy of the battery;
determining a corresponding temperature range through the energy coefficient and the variation coefficient;
establishing a preset mapping relation table based on the mapping relation among the temperature range, the consumed energy coefficient and the variable quantity coefficient;
the obtaining the target electric quantity according to the correction parameters comprises the following steps:
acquiring a battery index matrix, wherein the battery index matrix represents the corresponding relation between the capacity and the current of a battery, the battery index matrix is generated according to battery index data, and the battery index data comprises the capacity, the voltage, the current and the resistance of the battery;
calculating the energy consumed by preheating at the last moment of the battery;
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;
and obtaining the target electric quantity according to the target battery index matrix.
2. The vehicle remaining mileage correcting method of claim 1, wherein the determining the temperature range in which the current temperature is located, determining the correction parameter based on the temperature range, includes:
determining 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.
3. The vehicle remaining mileage correcting method of claim 1, wherein the obtaining the target electric quantity according to the target battery index matrix includes:
determining the battery capacity and the 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 current and time at the current moment;
and obtaining the target electric quantity according to the battery capacity at the current moment, the electric quantity at the last moment of the battery and the integral of the current and time at the current moment.
4. The vehicle remaining mileage correcting method of claim 1, wherein calculating the energy consumed by preheating the battery at a time includes:
obtaining battery parameters during preheating of the battery, wherein the battery parameters comprise: current, voltage and resistance;
and calculating the energy consumed by preheating the battery at one moment according to the voltage, the current and the resistance.
5. The vehicle remaining mileage correcting method according to any one of claims 1 to 4, wherein the calculating the remaining mileage of the vehicle based on the target electric quantity to achieve the vehicle remaining mileage correction 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 driving mileage of the vehicle.
6. A vehicle remaining mileage correcting apparatus, characterized by comprising:
the detection module is used for detecting the current temperature and the current electric quantity of the 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 smaller than a preset temperature threshold value;
the determining module is used for determining a temperature range in which the current temperature is located, and determining a correction parameter according to the temperature range;
the acquisition module is used for acquiring the target electric quantity according to the correction parameters;
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 driving mileage of the vehicle;
the detection module is also used for collecting battery heating consumption energy samples and battery discharging energy samples 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 battery discharging efficiency according to the consumed energy and battery discharging energy of the battery; determining a corresponding temperature range through the energy coefficient and the variation coefficient; establishing a preset mapping relation table based on the mapping relation among the temperature range, the consumed energy coefficient and the variable quantity coefficient;
the acquisition module is further used for acquiring a battery index matrix, the battery index matrix represents the corresponding relation between the capacity and the current of the battery, the battery index matrix is generated according to battery index data, and the battery index data comprise the capacity, the voltage, the current and the resistance of the battery; calculating the energy consumed by preheating at the last moment of the battery; 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; and obtaining the target electric quantity according to the target battery index matrix.
7. A vehicle remaining mileage correcting apparatus, 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 5.
8. A storage medium having stored thereon a vehicle remaining mileage correcting program which, when executed by a processor, implements the vehicle remaining mileage correcting method according to any one of claims 1 to 5.
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