CN114976375A - Battery use termination temperature estimation method, device, vehicle and storage medium - Google Patents
Battery use termination temperature estimation method, device, vehicle and storage medium Download PDFInfo
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- CN114976375A CN114976375A CN202110969284.5A CN202110969284A CN114976375A CN 114976375 A CN114976375 A CN 114976375A CN 202110969284 A CN202110969284 A CN 202110969284A CN 114976375 A CN114976375 A CN 114976375A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- 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
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- 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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Abstract
The application provides a battery use termination temperature estimation method, a battery use termination temperature estimation device, a vehicle and a storage medium. The method comprises the following steps: acquiring the current journey information; acquiring the battery initial temperature and the environment initial temperature of the current journey; determining a battery temperature rise gain value of the current trip according to the current trip information, the battery initial temperature and the environment initial temperature; and determining the estimated value of the use termination temperature of the battery at the end of the current stroke according to the battery temperature rise gain value, the battery initial temperature and the environment initial temperature of the current stroke. This application can estimate according to this journey information, can the operating mode of this journey of self-adaptation, does not rely on special operating mode, can improve the accuracy of estimating the use termination temperature of battery.
Description
Technical Field
The present disclosure relates to the field of electric vehicles, and more particularly, to a method and an apparatus for estimating a use termination temperature of a battery, a vehicle and a storage medium.
Background
In a battery management system, the power performance that a battery can provide is related to the end-of-service temperature of the battery. The end-of-use temperature of the battery is the temperature of the battery at the end of the electric vehicle's journey. Since the battery is typically a battery pack, the temperature of the battery may be the average temperature of the battery pack. The use termination temperature of the battery is accurately estimated, so that correction coefficients in a vehicle control strategy can be reasonably set, the whole process can be smoothly controlled, and the user experience is improved.
Currently, the end-of-service temperature of a battery is typically estimated using the average temperature rise level under a particular operating condition. However, since the driving conditions are complicated and varied during actual driving, the result of estimating the end-of-use temperature of the battery using this method is not accurate.
Disclosure of Invention
The application provides a method and a device for estimating the use termination temperature of a battery, a vehicle and a storage medium, which are used for solving the problem that the estimation result of the use termination temperature of the battery is inaccurate.
In a first aspect, the present application provides a battery end-of-use temperature estimation method, including:
acquiring the current journey information;
acquiring the battery initial temperature and the environment initial temperature of the current journey;
determining a battery temperature rise gain value of the current trip according to the current trip information, the battery initial temperature and the environment initial temperature;
and determining the estimated value of the use termination temperature of the battery at the end of the current stroke according to the battery temperature rise gain value, the battery initial temperature and the environment initial temperature of the current stroke.
In one possible implementation mode, the current trip information includes a total driving mileage of the current trip, a driving mileage corresponding to each road type in the current trip, and a driving mileage corresponding to each road speed limit type in the current trip;
determining the battery temperature rise gain value of the current stroke according to the current stroke information, the battery initial temperature and the environment initial temperature, wherein the method comprises the following steps:
determining temperature rise gain values of each road type in the current journey and each road speed limit type in the current journey, which correspond to the battery initial temperature and the environment initial temperature;
determining a total temperature rise gain value of the road type in the current journey according to the total driving mileage of the current journey, the driving mileage corresponding to each road type in the current journey and the temperature rise gain value of each road type in the current journey corresponding to the battery initial temperature and the environment initial temperature;
determining a total temperature rise gain value of the road speed limit type in the journey according to the total travel mileage of the journey, the travel mileage corresponding to each road speed limit type in the journey and the temperature rise gain value of each road speed limit type in the journey corresponding to the battery initial temperature and the environment initial temperature;
and determining the battery temperature rise gain value of the current journey according to the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed limit type in the current journey.
In a possible implementation manner, the calculation formula of the total temperature rise gain value of the road type in the current trip is as follows:
wherein, K 1 The total temperature rise gain value of the road type in the current journey; l is the total driving mileage of the current journey; l is a radical of an alcohol 1i The driving mileage corresponding to the road type i in the current journey is obtained; k is a radical of formula 1i The temperature rise gain value of the road type i in the current journey corresponding to the battery initial temperature and the environment initial temperature; n is the number of the road types in the current journey;
the calculation formula of the total temperature rise gain value of the road speed limit type in the travel is as follows:
wherein, K 2 The total temperature rise gain value is the road speed limit type in the current journey; l is 2j The driving mileage corresponding to the road speed limit type j in the current journey is obtained; k is a radical of 2j The temperature rise gain value of the road speed limit type j in the current journey corresponding to the battery initial temperature and the environment initial temperature; and m is the number of the road speed limit types in the current journey.
In a possible implementation manner, determining the battery temperature rise gain value of the current trip according to the total temperature rise gain value of the road type in the current trip and the total temperature rise gain value of the road speed limit type in the current trip includes:
and summing the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed-limiting type in the current journey to obtain the battery temperature rise gain value of the current journey.
In a possible implementation manner, after determining the estimated usage termination temperature value of the battery at the end of the current trip according to the battery temperature rise gain value, the battery starting temperature, and the environment starting temperature of the current trip, the method further includes:
acquiring an actual value of the use termination temperature of the battery at the end of the current stroke;
if the absolute value of the difference value between the estimated use termination temperature value of the battery at the end of the current stroke and the actual use termination temperature value of the battery at the end of the current stroke is larger than the preset difference value, calculating a correction coefficient of the battery temperature rise gain value according to the actual use termination temperature value of the battery at the end of the current stroke and the estimated use termination temperature value of the battery at the end of the current stroke;
and correcting the battery temperature rise gain value of the next stroke according to the correction coefficient of the battery temperature rise gain value, and determining the estimated use termination temperature value of the battery at the end of the next stroke according to the corrected battery temperature rise gain value of the next stroke.
In a possible implementation manner, the calculating a correction coefficient of the battery temperature rise gain value according to the actual value of the end-of-use temperature of the battery at the end of the current trip and the estimated value of the end-of-use temperature of the battery at the end of the current trip includes:
dividing the actual value of the use termination temperature of the battery at the end of the current stroke by the estimated value of the use termination temperature of the battery at the end of the current stroke to obtain a correction coefficient of a battery temperature rise gain value;
according to the correction coefficient of the battery temperature rise gain value, correcting the battery temperature rise gain value of the next stroke, comprising the following steps:
and multiplying the correction coefficient of the battery temperature rise gain value by the battery temperature rise gain value of the next stroke to obtain the corrected battery temperature rise gain value of the next stroke.
In a possible implementation manner, determining an estimated usage termination temperature of the battery at the end of the current trip according to the battery temperature rise gain value, the battery starting temperature, and the environment starting temperature of the current trip includes:
according to T g ＝(T h -T q ) xK, calculating to obtain the estimated value T of the use termination temperature of the battery at the end of the current journey g ；
Wherein, T h Is the ambient starting temperature; t is q Is the cell starting temperature; and K is the battery temperature rise gain value of the current stroke.
In a second aspect, the present application provides an end-of-use temperature estimation device for a battery, comprising:
the first acquisition module is used for acquiring the travel information;
the second acquisition module is used for acquiring the battery initial temperature and the environment initial temperature of the current journey;
the temperature rise gain value determining module is used for determining the battery temperature rise gain value of the current stroke according to the current stroke information, the battery initial temperature and the environment initial temperature;
and the use termination temperature estimation module is used for determining the use termination temperature estimation value of the battery at the end of the current stroke according to the battery temperature rise gain value, the battery starting temperature and the environment starting temperature of the current stroke.
In one possible implementation mode, the current trip information includes a total driving mileage of the current trip, a driving mileage corresponding to each road type in the current trip, and a driving mileage corresponding to each road speed limit type in the current trip;
the temperature rise gain value determination module is specifically configured to:
determining temperature rise gain values of each road type in the current journey and each road speed limit type in the current journey, which correspond to the battery initial temperature and the environment initial temperature;
determining a total temperature rise gain value of the road type in the current journey according to the total driving mileage of the current journey, the driving mileage corresponding to each road type in the current journey and the temperature rise gain value of each road type in the current journey corresponding to the battery initial temperature and the environment initial temperature;
determining the total temperature rise gain value of the road speed limit type in the current journey according to the total driving mileage of the current journey, the driving mileage corresponding to each road speed limit type in the current journey and the temperature rise gain value of each road speed limit type in the current journey corresponding to the battery starting temperature and the environment starting temperature;
and determining the battery temperature rise gain value of the current journey according to the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed limit type in the current journey.
In a possible implementation manner, in the temperature rise gain value determining module, a calculation formula of a total temperature rise gain value of the road type in the current trip is as follows:
wherein, K 1 The total temperature rise gain value of the road type in the current journey; l is the total mileage of the current journey; l is 1i The driving mileage corresponding to the road type i in the current journey is obtained; k is a radical of 1i The temperature rise gain value of the road type i in the current journey corresponding to the battery initial temperature and the environment initial temperature; n is the number of road types in the current journey;
the calculation formula of the total temperature rise gain value of the road speed limit type in the current journey is as follows:
wherein, K 2 The total temperature rise gain value is the road speed limit type in the current journey; l is 2j The driving mileage corresponding to the road speed limit type j in the current journey is obtained; k is a radical of formula 2j The temperature rise gain value of the road speed limit type j in the current journey corresponding to the battery initial temperature and the environment initial temperature; and m is the number of the road speed limit types in the current journey.
In one possible implementation, the temperature rise gain value determining module is further configured to:
and summing the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed-limiting type in the current journey to obtain the battery temperature rise gain value of the current journey.
In one possible implementation, the end-of-use temperature estimation device for a battery further includes a correction module;
the correction module is used for:
acquiring an actual value of the use termination temperature of the battery at the end of the current stroke;
if the absolute value of the difference value between the estimated use termination temperature value of the battery at the end of the current stroke and the actual use termination temperature value of the battery at the end of the current stroke is larger than the preset difference value, calculating a correction coefficient of the battery temperature rise gain value according to the actual use termination temperature value of the battery at the end of the current stroke and the estimated use termination temperature value of the battery at the end of the current stroke;
and correcting the battery temperature rise gain value of the next stroke according to the correction coefficient of the battery temperature rise gain value, and determining the estimated use termination temperature value of the battery at the end of the next stroke according to the corrected battery temperature rise gain value of the next stroke.
In one possible implementation, the modification module is further configured to:
dividing the actual value of the use termination temperature of the battery at the end of the current stroke by the estimated value of the use termination temperature of the battery at the end of the current stroke to obtain a correction coefficient of a battery temperature rise gain value;
and multiplying the correction coefficient of the battery temperature rise gain value by the battery temperature rise gain value of the next stroke to obtain the corrected battery temperature rise gain value of the next stroke.
In one possible implementation, the use termination temperature estimation module is specifically configured to:
according to T g ＝(T h -T q ) xK, calculating to obtain the estimated value T of the use termination temperature of the battery at the end of the current journey g ；
Wherein, T h Is the ambient starting temperature; t is q Is the cell starting temperature; and K is the battery temperature rise gain value of the current stroke.
In a third aspect, the present application provides a terminal, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for estimating the use termination temperature of a battery according to the first aspect or any one of the possible implementations of the first aspect when executing the computer program.
In a fourth aspect, embodiments of the present application provide a vehicle, including a terminal as described in the third aspect.
In a fifth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the steps of the method for estimating the usage termination temperature of a battery according to the first aspect or any one of the possible implementations of the first aspect.
The embodiment of the application provides a method, a device, a vehicle and a storage medium for estimating the use termination temperature of a battery, wherein the battery temperature rise gain value of the current trip is determined according to the current trip information, the battery initial temperature of the current trip and the environment initial temperature; the estimated value of the use termination temperature of the battery at the end of the travel is determined according to the battery temperature rise gain value of the travel, the battery initial temperature of the travel and the environment initial temperature, the estimation can be performed according to the travel information, the working condition of the travel can be self-adapted, the dependence on a special working condition is avoided, and the accuracy of estimating the use termination temperature of the battery can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a flow chart of an implementation of a method for estimating a usage termination temperature of a battery according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a use termination temperature estimation device for a battery according to an embodiment of the present application;
fig. 3 is a schematic diagram of a terminal provided in an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
To make the objects, technical solutions and advantages of the present application more clear, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, it shows a flowchart of an implementation of a method for estimating a use termination temperature of a battery according to an embodiment of the present application, where the use termination temperature is an average temperature of the battery at the end of a vehicle running; the execution subject of the method can be a terminal, and the terminal can be a vehicle-mounted terminal or a vehicle-mounted controller. The method is detailed as follows:
in S101, the present trip information is acquired.
In this embodiment, in order to estimate the use termination temperature of the battery at the end of the current trip, the current trip information is first obtained, and subsequent estimation is performed based on the current trip information, so that the working condition of the current trip can be adapted adaptively, and the accuracy of the use termination temperature of the battery at the end of the current trip is improved.
In a possible implementation manner, the current trip information may be acquired through a vehicle navigation system. And the vehicle-mounted navigation system sends the travel information to the terminal. Illustratively, before the current journey is started, the user inputs the destination of the current journey in the vehicle-mounted navigation system, and the vehicle-mounted navigation system automatically plans a route according to the starting place and the destination and determines the current journey information according to the route.
The current trip information is information that affects the temperature rise level of the battery in the current trip. The vehicle running state such as the speed, acceleration, deceleration, and the like of the vehicle, the ambient temperature, the power consumption of electric devices such as an air conditioner, and the like all affect the temperature rise of the battery. The driving habit of the driver, the road condition information in the current journey and the like can influence the running state of the vehicle, and further influence the temperature rise level of the battery.
In some embodiments, the current trip information includes a total driving mileage of the current trip, a driving mileage corresponding to each road type in the current trip, and a driving mileage corresponding to each road speed limit type in the current trip.
The road type may be a highway, an urban road, or the like. The road speed limit type can be a type of 50km/h speed limit, 100km/h speed limit and the like. The road type and the road speed limit type in the current journey can be determined according to the driving route of the current journey.
For example, the traveled mileage corresponding to each road type in the current trip may include the traveled mileage on a highway and the traveled mileage on an urban road in the current trip. The traveled mileage corresponding to each road speed limit type in the current trip may include the traveled mileage on a road section with a speed limit of 50km/h and the traveled mileage on a road section with a speed limit of 100km/h, etc. in the current trip.
In S102, the battery start temperature and the environment start temperature of the present trip are acquired.
In the present embodiment, a Battery Management System (BMS) may collect the temperature of the battery and the ambient temperature in which the battery is located in real time. When the current journey starts, the acquired battery temperature is the battery initial temperature of the current journey, and the acquired environment temperature of the battery is the environment initial temperature of the current journey. And the battery management system sends the acquired battery initial temperature and the acquired environment initial temperature of the current trip to the terminal. The battery starting temperature is an average value of temperatures of a plurality of positions of the battery at the beginning of the current journey.
In one possible implementation, the battery start temperature and the ambient start temperature of the current trip may be collected by a temperature sensor.
In S103, the battery temperature rise gain value of the current trip is determined according to the current trip information, the battery start temperature, and the environment start temperature.
During the running of the vehicle, the temperature of the battery changes. In this embodiment, the change can be characterized by a battery temperature rise gain value. The battery temperature rise gain value of the current trip is related to the current trip information, the battery starting temperature and the environment starting temperature, so that the battery temperature rise gain value of the current trip can be determined according to the current trip information, the battery starting temperature and the environment starting temperature.
In some embodiments, the S103 may include:
determining a temperature rise gain value of each road type in the current journey and a temperature rise gain value of each road speed limit type in the current journey, which correspond to the battery initial temperature and the environment initial temperature;
determining a total temperature rise gain value of the road type in the current journey according to the total driving mileage of the current journey, the driving mileage corresponding to each road type in the current journey and the temperature rise gain value of each road type in the current journey corresponding to the battery initial temperature and the environment initial temperature;
determining the total temperature rise gain value of the road speed limit type in the current journey according to the total driving mileage of the current journey, the driving mileage corresponding to each road speed limit type in the current journey and the temperature rise gain value of each road speed limit type in the current journey corresponding to the battery starting temperature and the environment starting temperature;
and determining the battery temperature rise gain value of the current journey according to the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed limit type in the current journey.
In this embodiment, each road type corresponds to a temperature rise gain value that is affected by the battery start temperature and the environment start temperature. Each road speed limit type corresponds to a temperature rise gain value which is influenced by the initial temperature of the battery and the initial temperature of the environment.
For example, the first table may store correspondence relationships of the battery start temperature, the environment start temperature, the road type, and the temperature rise gain value. According to the battery starting temperature of the current trip, the environment starting temperature of the current trip and each road type included in the current trip, the temperature rise gain value of each road type in the current trip can be obtained from the first table.
The second table may store a correspondence of a battery start temperature, an environment start temperature, a road speed limit type, and a temperature rise gain value. And obtaining the temperature rise gain value of each road speed limit type in the current journey from the second table according to the battery starting temperature of the current journey, the environment starting temperature of the current journey and each road speed limit type included in the current journey.
The first table and the second table may be obtained according to a pre-training. For example, the first table and the second table may be obtained by performing fitting training using a least square method based on a calculation formula of an estimated value of the use termination temperature of the battery according to a training sample set. The training sample set may include a plurality of training samples, and each training sample may include a battery start temperature, an environment start temperature, an actual value of a use end temperature of the battery, trip information of the trip, and the like.
Based on the total driving mileage of the current trip, the driving mileage corresponding to each road type in the current trip, and the temperature rise gain value of each road type in the current trip corresponding to the battery starting temperature and the environment starting temperature, the total temperature rise gain value of the road type in the current trip can be calculated; the proportion of the driving mileage corresponding to each road type in the current trip can be used as the weight coefficient of each road type, the weighted temperature rise gain value of each road type can be obtained according to the weight coefficient of each road type and the temperature rise gain value of each road type, and then the total temperature rise gain value of the road types in the current trip is obtained by summing the weighted temperature rise gain values of each road type.
Based on the total driving mileage of the current trip, the driving mileage corresponding to each road speed limit type in the current trip, and the temperature rise gain value of each road speed limit type in the current trip corresponding to the battery starting temperature and the environment starting temperature, the total temperature rise gain value of the road speed limit type in the current trip can be calculated; the weighted temperature rise gain value of each road speed limit type is obtained according to the weight coefficient of each road speed limit type and the temperature rise gain value of each road speed limit type, and then the weighted temperature rise gain value of each road speed limit type is summed to obtain the total temperature rise gain value of the road speed limit type in the current trip.
The following formula can be used for calculation.
In some embodiments, the calculation formula of the total temperature rise gain value of the road type in the current trip is as follows:
wherein, K 1 The total temperature rise gain value is the road type in the current journey; l is the total driving mileage of the current journey; l is 1i The driving mileage corresponding to the road type i in the current journey; k is a radical of 1i The temperature rise gain value of the road type i in the current journey corresponding to the battery initial temperature and the environment initial temperature; n is the number of road types in the current journey;
the calculation formula of the total temperature rise gain value of the road speed limit type in the current journey is as follows:
wherein, K 2 The total temperature rise gain value is the road speed limit type in the current journey; l is 2j The driving mileage corresponding to the road speed limit type j in the current journey; k is a radical of 2j The road in the current journey corresponding to the initial temperature of the battery and the initial temperature of the environmentThe temperature rise gain value of the speed limit type j; and m is the number of the road speed limit types in the current journey.
In this embodiment, the road types in the current trip may be numbered from 1 to n, and each road type has a corresponding mileage and temperature rise gain value. The road speed limit types in the current journey can be numbered from 1 to m, and each road speed limit type has a corresponding travel mileage and temperature rise gain value.
In some embodiments, determining the battery temperature rise gain value of the current trip according to the total temperature rise gain value of the road type in the current trip and the total temperature rise gain value of the road speed limit type in the current trip includes:
and summing the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed-limiting type in the current journey to obtain the battery temperature rise gain value of the current journey.
In this embodiment, the total temperature rise gain value of the road type in the current trip and the total temperature rise gain value of the speed-limited road type in the current trip are added to obtain the battery temperature rise gain value K in the current trip, that is, K is equal to K 1 +K 2 。
In a possible implementation manner, the determining the battery temperature rise gain value of the current trip according to the total temperature rise gain value of the road type in the current trip and the total temperature rise gain value of the road speed limit type in the current trip includes:
and carrying out weighted summation on the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed-limiting type in the current journey to obtain the battery temperature rise gain value of the current journey.
In this embodiment, the battery temperature rise gain value K ═ aK in the current trip 1 +bK 2 And a is the weight value of the total temperature rise gain value of the road type in the current journey, b is the weight value of the total temperature rise gain value of the road speed limit type in the current journey, and a + b is 1. The values of a and b can be set according to actual requirements or obtained according to training, and are not particularly limited herein.
In S104, the estimated use termination temperature of the battery at the end of the current trip is determined according to the battery temperature rise gain value, the battery start temperature, and the environment start temperature of the current trip.
The use termination temperature of the battery at the end of the current trip is related to the battery temperature rise gain value of the current trip, the battery starting temperature of the current trip and the environment starting temperature of the current trip, so that the use termination temperature estimation value of the battery at the end of the current trip can be determined according to the battery temperature rise gain value of the current trip, the battery starting temperature and the environment starting temperature.
In some embodiments, the S104 may include:
according to T g ＝(T h -T q ) xK, calculating to obtain the estimated value T of the use termination temperature of the battery at the end of the current journey g ；
Wherein, T h Is the ambient starting temperature; t is q Is the cell starting temperature; and K is the battery temperature rise gain value of the current stroke.
The battery temperature rise gain value of the current trip is determined according to the current trip information, the battery initial temperature of the current trip and the environment initial temperature; the estimated value of the use termination temperature of the battery at the end of the travel is determined according to the battery temperature rise gain value of the travel, the battery initial temperature of the travel and the environment initial temperature, the estimation can be performed according to the travel information, the working condition of the travel can be self-adapted, the dependence on a special working condition is avoided, and the accuracy of estimating the use termination temperature of the battery can be improved.
In some embodiments, after S104, the method for estimating the use termination temperature of the battery may further include:
acquiring an actual value of the use termination temperature of the battery at the end of the current stroke;
if the absolute value of the difference value between the estimated use termination temperature value of the battery at the end of the current stroke and the actual use termination temperature value of the battery at the end of the current stroke is larger than the preset difference value, calculating a correction coefficient of the battery temperature rise gain value according to the actual use termination temperature value of the battery at the end of the current stroke and the estimated use termination temperature value of the battery at the end of the current stroke;
and correcting the battery temperature rise gain value of the next stroke according to the correction coefficient of the battery temperature rise gain value, and determining the estimated use termination temperature value of the battery at the end of the next stroke according to the corrected battery temperature rise gain value of the next stroke.
In this embodiment, the actual value of the end-of-use temperature of the battery at the end of the present trip may be collected by the BMS or the temperature sensor.
The absolute value of the difference between the estimated use end temperature value of the battery at the end of the current stroke and the actual use end temperature value of the battery at the end of the current stroke is calculated. If the absolute value is not larger than the preset difference value, the estimation is considered to be more accurate, and the estimation can be carried out by adopting the same method without correction in the next estimation.
If the absolute value is larger than the preset difference value, the estimation error is considered to be larger, and the correction coefficient of the battery temperature rise gain value can be calculated according to the actual value of the use termination temperature of the battery at the end of the current stroke and the estimated value of the use termination temperature of the battery at the end of the current stroke. When estimating the use termination temperature of the battery in the next trip, firstly acquiring the information of the next trip, acquiring the initial temperature and the environment initial temperature of the battery in the next trip, and determining the temperature rise gain value of the battery in the next trip according to the information of the next trip, the initial temperature and the environment initial temperature of the battery in the next trip; then according to the correction coefficient of the battery temperature rise gain value, correcting the battery temperature rise gain value of the next stroke to obtain the corrected battery temperature rise gain value of the next stroke; and finally, determining the estimated value of the use termination temperature of the battery at the end of the next stroke according to the corrected battery temperature rise gain value of the next stroke, the battery starting temperature of the next stroke and the environment starting temperature.
The preset difference value can be set according to actual requirements. For example, it may be 2 ℃.
The reason for the estimation error is related to the first table and the second table obtained by performing fitting training in the early stage. When fitting training is performed in an early stage, errors may exist in the first table and the second table obtained by fitting training due to insufficient training samples or other reasons, and therefore, errors exist in the estimation. The error is irrelevant to the current travel information, so that when the battery temperature rise gain value of the next travel is corrected, the condition that the next travel information is consistent with the current travel information does not need to be ensured.
In some embodiments, the calculating the correction coefficient of the battery temperature rise gain value according to the actual value of the end-of-use temperature of the battery at the end of the current trip and the estimated value of the end-of-use temperature of the battery at the end of the current trip includes:
and dividing the actual value of the use termination temperature of the battery at the end of the current stroke by the estimated value of the use termination temperature of the battery at the end of the current stroke to obtain a correction coefficient of the temperature rise gain value of the battery.
Correspondingly, according to the correction coefficient of the battery temperature rise gain value, the battery temperature rise gain value of the next stroke is corrected, and the method comprises the following steps:
and multiplying the correction coefficient of the battery temperature rise gain value by the battery temperature rise gain value of the next stroke to obtain the corrected battery temperature rise gain value of the next stroke.
In the present embodiment, the correction coefficient of the battery temperature increase gain value is the actual value of the end-of-use temperature of the battery at the end of the present stroke/the estimated value of the end-of-use temperature of the battery at the end of the present stroke. And the corrected battery temperature rise gain value of the next trip is the correction coefficient of the battery temperature rise gain value and the battery temperature rise gain value of the next trip.
Wherein, can also adopt another method to calculate the battery temperature rise gain value of the next journey after revising, the details are as follows:
in one possible implementation manner, the calculating a correction coefficient of the battery temperature rise gain value according to the actual value of the end-of-use temperature of the battery at the end of the current trip and the estimated value of the end-of-use temperature of the battery at the end of the current trip includes:
and calculating the absolute value of the difference value between the estimated use termination temperature value of the battery at the end of the current stroke and the actual use termination temperature value of the battery at the end of the current stroke, and dividing the absolute value by the estimated use termination temperature value of the battery at the end of the current stroke to obtain the correction coefficient of the temperature rise gain value of the battery.
Correspondingly, according to the correction coefficient of the battery temperature rise gain value, the battery temperature rise gain value of the next stroke is corrected, and the method comprises the following steps:
if the estimated value of the use end temperature of the battery at the end of the current stroke is greater than the actual value of the use end temperature of the battery at the end of the current stroke, the corrected battery temperature rise gain value of the next stroke is equal to the battery temperature rise gain value of the next stroke (1-correction coefficient of the battery temperature rise gain value);
if the estimated end-of-use temperature of the battery at the end of the current stroke is smaller than the actual end-of-use temperature of the battery at the end of the current stroke, the corrected battery temperature rise gain value in the next stroke is equal to the battery temperature rise gain value in the next stroke (1+ correction coefficient of the battery temperature rise gain value).
According to the embodiment, the battery temperature rise gain value of the next stroke can be corrected according to the correction coefficient of the battery temperature rise gain value, and the accuracy of the estimated value of the use termination temperature of the battery is further improved.
The accuracy of the battery end-of-use temperature estimate depends on factors such as current, battery start temperature, ambient temperature, and mileage of the trip. The mileage of the current trip is an important factor for estimating the use termination temperature of the battery, and the self-adaptive estimation of the temperature can be realized.
The method and the device can perform online estimation on the temperature change under different driving conditions on any planned driving route, further estimate the use termination temperature of the battery under the driving conditions of different roads and traffic environments, and are beneficial to other control strategies to make strategies according to the use termination temperature.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The following are apparatus embodiments of the present application, and for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 2 is a schematic structural diagram of a device for estimating a use termination temperature of a battery according to an embodiment of the present application, and for convenience of description, only a portion related to the embodiment of the present application is shown, and details are as follows:
as shown in fig. 2, the battery use end temperature estimation device 30 includes: a first acquisition module 31, a second acquisition module 32, a temperature rise gain value determination module 33 and an end of use temperature estimation module 34.
A first obtaining module 31, configured to obtain the current trip information;
a second obtaining module 32, configured to obtain a battery start temperature and an environment start temperature of the current trip;
the temperature rise gain value determining module 33 is configured to determine a battery temperature rise gain value of the current trip according to the current trip information, the battery starting temperature, and the environment starting temperature;
and the use termination temperature estimation module 34 is configured to determine an estimated use termination temperature of the battery at the end of the current trip according to the battery temperature rise gain value, the battery starting temperature, and the environment starting temperature of the current trip.
According to the embodiment of the application, the temperature rise gain value of the battery in the current trip is determined according to the trip information, the battery initial temperature in the current trip and the environment initial temperature through the temperature rise gain value determining module; and the use termination temperature estimation module determines the use termination temperature estimated value of the battery at the end of the travel according to the battery temperature rise gain value of the travel, the battery initial temperature of the travel and the environment initial temperature, can estimate according to the travel information, can self-adapt to the working condition of the travel, does not depend on special working conditions, and can improve the accuracy of estimating the use termination temperature of the battery.
In one possible implementation mode, the current trip information includes a total driving mileage of the current trip, a driving mileage corresponding to each road type in the current trip, and a driving mileage corresponding to each road speed limit type in the current trip;
the temperature rise gain value determining module 33 is specifically configured to:
determining temperature rise gain values of each road type in the current journey and each road speed limit type in the current journey, which correspond to the battery initial temperature and the environment initial temperature;
determining a total temperature rise gain value of the road type in the current journey according to the total driving mileage of the current journey, the driving mileage corresponding to each road type in the current journey and the temperature rise gain value of each road type in the current journey corresponding to the battery initial temperature and the environment initial temperature;
determining the total temperature rise gain value of the road speed limit type in the current journey according to the total driving mileage of the current journey, the driving mileage corresponding to each road speed limit type in the current journey and the temperature rise gain value of each road speed limit type in the current journey corresponding to the battery starting temperature and the environment starting temperature;
and determining the battery temperature rise gain value of the current journey according to the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed limit type in the current journey.
In a possible implementation manner, in the temperature rise gain value determining module 33, a calculation formula of a total temperature rise gain value of the road type in the current trip is:
wherein, K 1 The total temperature rise gain value of the road type in the current journey; l is the total driving mileage of the current journey; l is 1i The driving mileage corresponding to the road type i in the current journey is obtained; k is a radical of 1i The temperature rise gain value of the road type i in the current journey corresponding to the battery initial temperature and the environment initial temperature; n is the number of road types in the current journey;
the calculation formula of the total temperature rise gain value of the road speed limit type in the current journey is as follows:
wherein, K 2 The total temperature rise gain value is the road speed limit type in the current journey; l is 2j The driving mileage corresponding to the road speed limit type j in the current journey is obtained; k is a radical of 2j The temperature rise gain value of the road speed limit type j in the current journey corresponding to the battery initial temperature and the environment initial temperature; and m is the number of the road speed limit types in the current journey.
In a possible implementation, the temperature rise gain value determining module 33 may be further configured to:
and summing the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed-limiting type in the current journey to obtain the battery temperature rise gain value of the current journey.
In one possible implementation, the battery end-of-use temperature estimation device 30 may further include: and a correction module.
The correction module may be configured to:
acquiring an actual value of the use termination temperature of the battery at the end of the current stroke;
if the absolute value of the difference value between the estimated use termination temperature value of the battery at the end of the current stroke and the actual use termination temperature value of the battery at the end of the current stroke is larger than the preset difference value, calculating a correction coefficient of the battery temperature rise gain value according to the actual use termination temperature value of the battery at the end of the current stroke and the estimated use termination temperature value of the battery at the end of the current stroke;
and correcting the battery temperature rise gain value of the next stroke according to the correction coefficient of the battery temperature rise gain value, and determining the estimated use termination temperature value of the battery at the end of the next stroke according to the corrected battery temperature rise gain value of the next stroke.
In one possible implementation, the modification module may be further configured to:
dividing the actual value of the use termination temperature of the battery at the end of the current stroke by the estimated value of the use termination temperature of the battery at the end of the current stroke to obtain a correction coefficient of a battery temperature rise gain value;
and multiplying the correction coefficient of the battery temperature rise gain value by the battery temperature rise gain value of the next stroke to obtain the corrected battery temperature rise gain value of the next stroke.
In one possible implementation, the use termination temperature estimation module 34 is specifically configured to:
according to T g ＝(T h -T q ) xK, calculating to obtain the estimated value T of the use termination temperature of the battery at the end of the current journey g ；
Wherein, T h Is the ambient starting temperature; t is q Is the cell starting temperature; and K is the battery temperature rise gain value of the current stroke.
The present application further provides a computer program product having a program code, which when executed in a corresponding processor, controller, computing device or terminal, performs the steps of any of the above-described embodiments of the method for estimating a use termination temperature of a battery, such as S101 to S104 shown in fig. 1. Those skilled in the art will appreciate that the methods presented in the embodiments of the present application and the apparatus pertaining thereto may be implemented in various forms of hardware, software, firmware, special purpose processors, or a combination thereof. The special-purpose processor may include an Application Specific Integrated Circuit (ASIC), a Reduced Instruction Set Computer (RISC), and/or a Field Programmable Gate Array (FPGA). The proposed method and apparatus are preferably implemented as a combination of hardware and software. The software is preferably installed as an application program on a program storage device. It is typically a machine based computer platform having hardware such as one or more Central Processing Units (CPU), a Random Access Memory (RAM), and one or more input/output (I/O) interfaces. An operating system is also typically installed on the computer platform. The various processes and functions described herein may either be part of an application program or part of it may be executed by an operating system.
Fig. 3 is a schematic diagram of a terminal according to an embodiment of the present application. As shown in fig. 3, the terminal 4 of this embodiment includes: a processor 40, a memory 41 and a computer program 42 stored in said memory 41 and executable on said processor 40. The processor 40, when executing the computer program 42, implements the steps in the above-described respective battery use termination temperature estimation method embodiments, such as S101 to S104 shown in fig. 1. Alternatively, the processor 40, when executing the computer program 42, implements the functions of the modules/units in the device embodiments described above, such as the modules/units 31 to 34 shown in fig. 2.
Illustratively, the computer program 42 may be partitioned into one or more modules/units, which are stored in the memory 41 and executed by the processor 40 to implement the scheme provided herein. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 42 in the terminal 4. For example, the computer program 42 may be divided into the modules/units 31 to 34 shown in fig. 2.
The terminal 4 may be a vehicle-mounted terminal or a vehicle-mounted controller or other computing device. The terminal 4 may include, but is not limited to, a processor 40, a memory 41. Those skilled in the art will appreciate that fig. 3 is merely an example of a terminal 4 and is not intended to be limiting of terminal 4, and may include more or fewer components than those shown, or some components in combination, or different components, e.g., the terminal may also include input-output devices, network access devices, buses, etc.
The Processor 40 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the terminal 4, such as a hard disk or a memory of the terminal 4. The memory 41 may also be an external storage device of the terminal 4, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) and the like provided on the terminal 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the terminal 4. The memory 41 is used for storing the computer program and other programs and data required by the terminal. The memory 41 may also be used to temporarily store data that has been output or is to be output.
Corresponding to the terminal 4, the embodiment of the present application further provides a vehicle, which includes the terminal 4.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. For the specific working processes of the units and modules in the system, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above may be implemented by a computer program, which may be stored in a computer readable storage medium and used by a processor to implement the steps of the embodiments of the method for estimating the end-of-use temperature of each battery. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier signal, telecommunications signal, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
Furthermore, features of the embodiments shown in the drawings of the present application or of the various embodiments mentioned in the present description are not necessarily to be understood as embodiments independent of each other. Rather, each feature described in one example of one embodiment can be combined with one or more other desired features from other embodiments to yield yet further embodiments, which are not described in text or with reference to the accompanying drawings.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (10)
1. A battery end-of-use temperature estimation method, comprising:
obtaining the current journey information;
acquiring the battery initial temperature and the environment initial temperature of the current journey;
determining a battery temperature rise gain value of the current trip according to the current trip information, the battery initial temperature and the environment initial temperature;
and determining the estimated value of the use termination temperature of the battery at the end of the current stroke according to the battery temperature rise gain value of the current stroke, the battery starting temperature and the environment starting temperature.
2. The method for estimating the use termination temperature of the battery according to claim 1, wherein the current trip information includes a total traveled mileage of the current trip, a traveled mileage corresponding to each road type of the current trip, and a traveled mileage corresponding to each road speed limit type of the current trip;
determining a battery temperature rise gain value of the current trip according to the current trip information, the battery starting temperature and the environment starting temperature, comprising:
determining temperature rise gain values of each road type in the current journey and each road speed limit type in the current journey, which correspond to the battery starting temperature and the environment starting temperature;
determining a total temperature rise gain value of the road type in the current journey according to the total driving mileage of the current journey, the driving mileage corresponding to each road type in the current journey, and the temperature rise gain value of each road type in the current journey corresponding to the battery starting temperature and the environment starting temperature;
determining a total temperature rise gain value of the road speed limit type in the current journey according to the total travel mileage of the current journey, the travel mileage corresponding to each road speed limit type in the current journey and the temperature rise gain value of each road speed limit type in the current journey corresponding to the battery initial temperature and the environment initial temperature;
and determining the battery temperature rise gain value of the current journey according to the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed limit type in the current journey.
3. The battery use termination temperature estimation method according to claim 2, wherein the calculation formula of the total temperature rise gain value of the road type in the current trip is:
wherein, K 1 The total temperature rise gain value of the road type in the current journey is obtained; l is the total driving mileage of the journey; l is 1i The driving mileage corresponding to the road type i in the current journey is obtained; k is a radical of 1i The temperature rise gain value of the road type i in the current journey corresponding to the battery initial temperature and the environment initial temperature is obtained; n is the number of road types in the current journey;
the calculation formula of the total temperature rise gain value of the road speed limit type in the current journey is as follows:
wherein, K 2 The total temperature rise gain value of the road speed limit type in the current journey is obtained; l is 2j The driving mileage corresponding to the road speed limit type j in the current journey; k is a radical of 2j The temperature rise gain value of the road speed limit type j in the current journey corresponding to the battery starting temperature and the environment starting temperature; and m is the number of the road speed limit types in the current journey.
4. The method for estimating the use termination temperature of the battery according to claim 2, wherein the determining the battery temperature rise gain value for the current trip according to the total temperature rise gain value for the road type in the current trip and the total temperature rise gain value for the speed limit type for the road in the current trip comprises:
and summing the total temperature rise gain value of the road type in the current journey and the total temperature rise gain value of the road speed-limiting type in the current journey to obtain the battery temperature rise gain value of the current journey.
5. The method for estimating usage termination temperature of a battery according to claim 1, further comprising, after determining the estimated usage termination temperature of the battery at the end of the current trip based on the gain value of the battery temperature rise of the current trip, the battery start temperature, and the environment start temperature:
acquiring an actual value of the use termination temperature of the battery at the end of the current stroke;
if the absolute value of the difference value between the estimated use termination temperature value of the battery at the end of the current stroke and the actual use termination temperature value of the battery at the end of the current stroke is greater than the preset difference value, calculating a correction coefficient of a battery temperature rise gain value according to the actual use termination temperature value of the battery at the end of the current stroke and the estimated use termination temperature value of the battery at the end of the current stroke;
and correcting the battery temperature rise gain value of the next stroke according to the correction coefficient of the battery temperature rise gain value, and determining the estimated use termination temperature value of the battery at the end of the next stroke according to the corrected battery temperature rise gain value of the next stroke.
6. The method for estimating the use end temperature of the battery according to claim 5, wherein the calculating the correction coefficient of the battery temperature rise gain value based on the actual value of the use end temperature of the battery at the end of the present trip and the estimated value of the use end temperature of the battery at the end of the present trip includes:
dividing the actual value of the use ending temperature of the battery at the end of the current stroke by the estimated value of the use ending temperature of the battery at the end of the current stroke to obtain a correction coefficient of a battery temperature rise gain value;
according to the correction coefficient of the battery temperature rise gain value, correcting the battery temperature rise gain value of the next stroke, comprising the following steps of:
and multiplying the correction coefficient of the battery temperature rise gain value by the battery temperature rise gain value of the next stroke to obtain the corrected battery temperature rise gain value of the next stroke.
7. The method for estimating the use termination temperature of a battery according to any one of claims 1 to 6, wherein the determining the estimated use termination temperature of the battery at the end of the current trip based on the battery temperature rise gain value of the current trip, the battery start temperature, and the environment start temperature includes:
according to T g ＝(T h -T q ) xK, calculating to obtain the estimated value T of the use termination temperature of the battery at the end of the current journey g ；
Wherein, T h Is the ambient starting temperature; t is q Is the cell starting temperature; and K is the battery temperature rise gain value of the current stroke.
8. An end-of-use temperature estimation device for a battery, comprising:
the first acquisition module is used for acquiring the travel information;
the second acquisition module is used for acquiring the battery initial temperature and the environment initial temperature of the current journey;
the temperature rise gain value determining module is used for determining a battery temperature rise gain value of the current stroke according to the current stroke information, the battery initial temperature and the environment initial temperature;
and the use termination temperature estimation module is used for determining the use termination temperature estimation value of the battery at the end of the current stroke according to the battery temperature rise gain value of the current stroke, the battery starting temperature and the environment starting temperature.
9. A vehicle, characterized in that the vehicle comprises a terminal; the terminal comprises a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method for estimating the use termination temperature of a battery according to any of the above claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the end-of-use temperature estimation method of a battery according to any one of claims 1 to 7 above.
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