CN116047296A - Method for predicting battery cut-off capacity, terminal device and storage medium - Google Patents
Method for predicting battery cut-off capacity, terminal device and storage medium Download PDFInfo
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- CN116047296A CN116047296A CN202310014469.XA CN202310014469A CN116047296A CN 116047296 A CN116047296 A CN 116047296A CN 202310014469 A CN202310014469 A CN 202310014469A CN 116047296 A CN116047296 A CN 116047296A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The application discloses a battery cut-off capacity prediction method, terminal equipment and a storage medium, and relates to the field of batteries. The method comprises the following steps: acquiring a battery temperature parameter and a battery capacity parameter of the battery; determining a battery discharge parameter and a capacity calculation parameter of the battery according to the battery temperature parameter and the battery capacity parameter; determining the discharge state of the battery according to the battery discharge parameters; determining a battery capacity calculation formula corresponding to the battery according to the discharge state; and calculating the battery cut-off capacity of the battery according to the capacity calculation parameter and the battery capacity calculation formula. The embodiment of the application aims to accurately predict the battery cut-off capacity of the terminal equipment, accurately perform early warning and reminding on the electric quantity exhaustion of the user, and improve the use experience of the terminal equipment.
Description
Technical Field
The present invention relates to the field of batteries, and in particular, to a method for predicting a cut-off capacity of a battery, a terminal device, and a storage medium.
Background
The existing terminal equipment such as a mobile phone, a computer and the like generally has the function of checking the battery cut-off capacity, and after checking the battery cut-off capacity, a user can know the residual working time of the terminal equipment conveniently, so that the terminal equipment is used reasonably.
The prior art generally estimates the cut-off capacity of the battery by using the current temperature, however, in a low temperature environment, when the terminal device starts to operate, the temperature of the battery may rise due to self-heating. According to electrochemical mechanism, the capacity and impedance of the battery change drastically in low temperature environment, and the capacity increases and the impedance decreases with increasing temperature. Therefore, if the current temperature is used to estimate the battery cut-off capacity Of the terminal device, the estimated total battery cut-off capacity (SOC) is lower, so that the error occurs in the displayed battery cut-off capacity, and the use experience Of the user is affected.
Disclosure of Invention
The application provides a prediction method of battery cut-off capacity, terminal equipment and storage medium, and aims to accurately predict the battery cut-off capacity of the terminal equipment, accurately perform early warning and reminding of electric quantity exhaustion on a user and improve the use experience of the terminal equipment.
In a first aspect, the present application provides a method for predicting a cut-off capacity of a battery, the method comprising: acquiring a battery temperature parameter and a battery capacity parameter of the battery; determining a battery discharge parameter and a capacity calculation parameter of the battery according to the battery temperature parameter and the battery capacity parameter; determining the discharge state of the battery according to the battery discharge parameters; determining a battery capacity calculation formula corresponding to the battery according to the discharge state; and calculating the battery cut-off capacity of the battery according to the capacity calculation parameter and the battery capacity calculation formula.
In a second aspect, the present application further provides a terminal device, where the terminal device includes a memory and a processor; the memory is used for storing a computer program; the processor is configured to execute the computer program and implement the method for predicting the battery cut-off capacity as described above when the computer program is executed.
In a third aspect, the present application also provides a computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to implement a method of predicting battery cut-off capacity as described above.
The application discloses a battery cut-off capacity prediction method, terminal equipment and a storage medium. Acquiring a battery temperature parameter and a battery capacity parameter of the battery; determining a battery discharge parameter and a capacity calculation parameter of the battery according to the battery temperature parameter and the battery capacity parameter; determining the discharge state of the battery according to the battery discharge parameters; determining a battery capacity calculation formula corresponding to the battery according to the discharge state; and calculating the battery cut-off capacity of the battery according to the capacity calculation parameter and the battery capacity calculation formula. Therefore, the battery cut-off capacity of the terminal equipment can be accurately predicted, and the user can be accurately warned and reminded of the electric quantity exhaustion, so that the use experience of the terminal equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic step flow diagram of a method for predicting a cut-off capacity of a battery according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of the substeps of determining a battery discharge parameter provided in an embodiment of the present application;
FIG. 3 is a schematic flow chart of the substeps of determining the discharge state of a battery according to an embodiment of the present application;
fig. 4 is an application scenario schematic diagram of a method for predicting a cut-off capacity of a battery according to an embodiment of the present application;
fig. 5 is a schematic block diagram of a structure of a terminal device provided in an embodiment of the present application;
it is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.
It is to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In a low temperature environment, when a terminal device such as a mobile phone, a computer, etc. starts to operate, the temperature of its battery may rise due to self-heating. According to electrochemical mechanism, the capacity and impedance of the battery change drastically in low temperature environment, and the capacity increases and the impedance decreases with increasing temperature.
Therefore, if the battery cutoff capacity (SOC) is estimated using the current temperature, the estimated overall battery cutoff capacity is made lower. We therefore need to predict the remaining capacity at the start of operation (before starting self-heating) and in operation of the device.
However, the battery is a very complex model, and the internal and external heat generation and heat exchange rates of the battery cause changes in the internal temperature and temperature distribution of the battery, and the temperature-sensitive battery parameters are affected by the temperature changes to cause changes in the internal reaction characteristics and thus changes in the heat generation power. That is, the discharge heat generation causes the battery temperature to rise, the battery temperature rise causes the impedance change, the impedance change affects the heat generation rate, and the future conditions are unknown, and it is very difficult to accurately calculate the battery temperature and the battery cutoff capacity.
Referring to fig. 1, fig. 1 is a flowchart of a method for predicting a cut-off capacity of a battery according to an embodiment of the present application. The prediction method of the battery cut-off capacity can be applied to terminal equipment such as mobile phones, computers and the like which can be used for displaying the battery cut-off capacity. The method for predicting the battery cut-off capacity can accurately predict the battery cut-off capacity of the terminal equipment, accurately perform early warning and reminding on the electric quantity exhaustion of the user, and improve the use experience of the terminal equipment.
As shown in fig. 1, the battery cut-off capacity prediction method may be applied to a terminal device, and the battery cut-off capacity prediction method includes steps S101 to S105.
S101, acquiring a battery temperature parameter and a battery capacity parameter of the battery.
The battery may be a battery of a terminal device, for example, a battery of a mobile phone or a computer. The battery temperature parameter may be used to indicate a battery temperature corresponding to a battery of the terminal device at each moment, and may specifically include a battery initial temperature and a battery discharge temperature. The battery capacity parameter may be used to represent a battery capacity corresponding to a battery of the terminal device at each moment, and may specifically include a battery initial capacity and a battery discharge capacity.
In some embodiments, the battery temperature parameter comprises a battery initial temperature and a battery discharge temperature, and the battery capacity parameter comprises a battery initial capacity and a battery discharge capacity; as the initial battery temperature, and acquiring the battery capacity in the battery standing state as the initial battery capacity; and after the battery is discharged for a preset time, acquiring the battery temperature of the battery as the battery discharge temperature, and acquiring the battery capacity of the battery as the battery discharge capacity. Therefore, the battery temperature parameter and the battery capacity parameter can be accurately obtained, so that the battery discharge parameter can be accurately calculated later.
The initial battery temperature is the battery temperature of the battery in a static state, the discharge temperature of the battery is the battery temperature of the battery after a preset discharge time period, the initial battery capacity is the battery capacity of the battery in the static state, the discharge temperature of the battery is the battery capacity of the battery after the preset discharge time period, and the preset time period can be any time period, such as 180s, and the method is not particularly limited.
Specifically, the battery state may be detected first, and if the battery is in the stationary state, the battery temperature in the stationary state of the battery at this time is obtained as the battery initial temperature, and the battery capacity in the stationary state of the battery at this time is obtained as the battery initial capacity. After the initial temperature and the initial capacity of the battery are obtained, discharging the battery by using a load, and after the battery is discharged for a preset period of time, obtaining the battery temperature at the moment of the battery as the battery discharging temperature, and obtaining the battery capacity at the moment of the battery as the battery discharging capacity.
Taking a mobile phone battery as an example, standing the mobile phone, wherein the battery state is the standing state, obtaining the battery temperature in the battery standing state as 30 degrees, taking the battery temperature as the initial battery temperature, and obtaining the battery capacity in the battery standing state as 50 percent, taking the battery capacity as the initial battery capacity. And discharging the battery by using a load, after discharging for 180 seconds, acquiring the battery temperature at the moment as 40 degrees, taking the battery temperature as the battery discharging temperature, acquiring the battery capacity at the moment as 45 percent, and taking the battery capacity as the battery discharging capacity.
S102, determining a battery discharge parameter and a capacity calculation parameter of the battery according to the battery temperature parameter and the battery capacity parameter.
The battery discharge parameter may be used to represent the discharge efficiency of the battery, and may specifically be a temperature capacity change ratio. The capacity calculation parameter is a calculation parameter required in a battery capacity calculation formula for calculating the cutoff capacity of the battery.
In some embodiments, determining a temperature change amount of the battery according to the battery temperature parameter; determining the capacity variation of the battery according to the battery capacity parameter; and determining the temperature capacity change ratio of the battery according to the temperature change amount and the capacity change amount, and taking the temperature capacity change ratio as the battery discharge parameter. Therefore, the temperature capacity change ratio of the battery can be accurately calculated, so that the cut-off capacity of the battery can be accurately calculated later.
As shown in fig. 2, determining the battery discharge parameter may specifically include steps S1021 through S1023.
S1021, determining the temperature variation of the battery according to the battery temperature parameter; s1022, determining the capacity variation of the battery according to the battery capacity parameter; s1023, determining the temperature capacity change ratio of the battery according to the temperature change amount and the capacity change amount, and taking the temperature capacity change ratio as the battery discharge parameter.
The temperature change amount is used for representing the temperature change of the battery in an initial static state after discharging for a preset period of time; the capacity change amount is used for indicating the change of the battery capacity in the initial static state after the preset discharging time. The temperature capacity change ratio is used to represent the ratio of the temperature change amount to the capacity change amount.
Specifically, the formula for calculating the temperature capacity change ratio may be:
wherein, the liquid crystal display device comprises a liquid crystal display device,
t is the discharge temperature of the battery and T is the temperature capacity change ratio 0 T-T for initial temperature of battery 0 The SOC is the discharge capacity of the battery, and is the temperature change of the battery 0 For initial capacity of battery, SOC-SOC 0 Is the capacity variation.
Specifically, determining the temperature variation of the battery through the battery discharge temperature and the battery initial temperature; determining the capacity variation of the battery according to the discharge capacity and the initial capacity of the battery; and determining the temperature capacity change ratio of the battery according to the temperature change amount and the capacity change amount, and taking the temperature capacity change ratio as the battery discharge parameter.
Exemplary, if the battery discharge temperature is T is 40, the initial battery temperature is T 0 At 30 DEG, the temperature change of the battery, namely T-T, is determined 0 Is 10 degrees; if the discharge capacity of the battery, i.e. SIC, is 50%, the initial capacity of the battery, i.e. SOC 0 45%, the capacity change of the battery, namely SOC-SOC, is determined 0 5%; and then according to the temperature change and the capacity change, determining the temperature-capacity change ratio of the battery, namely
2.
In some embodiments, determining a discharge cutoff point of the battery, and acquiring a battery temperature of the battery at the discharge cutoff point as a target battery temperature, and acquiring a battery capacity of the battery at the discharge cutoff point as a target battery capacity; and determining a corresponding capacity calculation parameter of the battery at the target battery temperature and the target battery capacity. Therefore, the target battery temperature and the target battery capacity can be accurately determined, and corresponding capacity calculation parameters can be accurately found.
The discharging cut-off point is used for indicating the corresponding time when the discharging of the battery is finished. The target battery temperature is the battery temperature of the battery at the discharge cut-off point, and the target battery capacity is the battery capacity of the battery at the discharge cut-off point. Since the capacity calculation parameters corresponding to different battery temperatures and battery capacities are generally different, it is necessary to accurately determine the corresponding target battery temperature and target battery capacity in order to find the corresponding capacity calculation parameters at the target battery temperature and target battery capacity.
Specifically, a discharge cut-off point of a battery is determined by determining a discharge state of the battery, and a battery temperature at the moment of the battery is obtained as a target battery temperature, and a battery capacity at the moment of the battery is obtained as a target battery capacity; and obtaining the corresponding capacity calculation parameters of the battery under the target battery temperature and the target battery capacity through a table lookup or formula method according to the battery temperature parameters and the battery capacity parameters.
In some embodiments, the capacity calculation parameters include an open circuit voltage value, a current value, and a resistance value.
The open-circuit voltage value is a potential difference between two poles of the battery at the target battery temperature and the target battery capacity without discharging and opening the circuit, the current value is a current value of the battery at the target battery temperature and the target battery capacity, and the resistance value is a resistance value of the battery at the target battery temperature and the target battery capacity.
Specifically, the open-circuit voltage value, the current value and the resistance value of the battery corresponding to the target battery temperature and the target battery capacity can be obtained through a table look-up or formula method.
S103, determining the discharge state of the battery according to the battery discharge parameters.
Wherein the discharge state is used for indicating that the battery temperature of the battery is changed faster or the battery capacity of the battery is changed faster, and the discharge state can comprise a first discharge state and a second discharge state. The battery discharge parameter may include a temperature capacity change ratio for representing a ratio of a temperature change amount to a capacity change amount.
In some embodiments, if the temperature capacity change ratio is a non-positive number, determining a discharge state of the battery to be a first discharge state; and if the temperature capacity change ratio is positive, determining that the discharge state of the battery is a second discharge state. The discharge state of the battery can thus be accurately determined, so that the corresponding battery capacity calculation formula can be accurately determined later.
As shown in fig. 3, determining the discharge state of the battery may include steps S1031 to S1033, in particular.
S1031, determining whether the temperature capacity change ratio is a non-positive number; s1032, if the temperature capacity change ratio is a non-positive number, determining that the discharge state of the battery is a first discharge state; and S1033, if the temperature capacity change ratio is positive, determining that the discharge state of the battery is a second discharge state.
The first discharging state is used for indicating that the ambient temperature drop rate is faster than the battery temperature rise rate, and the second discharging state is used for indicating that the ambient temperature drop rate is slower than the battery temperature rise rate. Different discharging states can be calculated through different battery capacity calculation formulas, so that the accuracy of the calculated battery cut-off capacity is ensured.
For example, if the temperature capacity change ratio is a negative number, it may be determined that the discharge state of the battery is a first discharge state, at which time the current battery temperature may be used to estimate the battery cut-off capacity. If the temperature capacity change ratio is zero, it may be determined that the discharge state of the battery is a first discharge state, at which time the current battery temperature may be used to estimate the battery cutoff capacity. If the temperature capacity change ratio is a positive number, it may be determined that the discharge state of the battery is the discharge state of the first map, and the current battery temperature and temperature capacity change ratio may be used to estimate the battery cut-off capacity.
S104, determining a battery capacity calculation formula corresponding to the battery according to the discharge state.
The battery capacity calculation formula is used for calculating the battery cutoff capacity of the battery, and different discharge states correspond to different battery capacity calculation formulas, so that the accuracy of the calculated battery cutoff capacity can be ensured.
In some embodiments, if the discharge state of the battery is the first discharge state, the battery capacity calculation formula corresponding to the battery is u=ocv (SOC, T) -i×r (SOC, T); if the discharge state of the battery is the second discharge state, the battery capacity calculation formula corresponding to the battery is u=ocv (SOC, t+Δt) -i×r (SOC, t+Δt).
Wherein U is a cut-off voltage value, OCV (SOC, T) is an open circuit voltage value at the target battery temperature and the target battery capacity, I is a current value at the target battery temperature and the target battery capacity, and R (SOC, T) is a resistance value at the target battery temperature and the target battery capacity; delta T is the predicted change in temperature.
Specifically, if the temperature capacity change ratio is negative or zero, the rate of decrease of the ambient temperature is faster than the rate of increase of the battery temperature at this time, and thus the discharge state of the battery can be determined to be the first discharge state, the current battery temperature can be used to estimate the battery cutoff capacity at this time, that is, u=ocv (SOC, T) -i×r (SOC, T) can be used to estimate the battery cutoff capacity.
If the temperature capacity change ratio is positive, the ambient temperature decrease rate is slower than the battery temperature increase rate at this time, and thus the discharge state of the battery can be determined to be the second discharge state, and the current battery temperature and temperature capacity change ratio can be used to estimate the battery cutoff capacity at this time, that is, u=ocv (SOC, t+Δt) -i×r (SOC, t+Δt).
For example, if it is determined that the discharge state of the battery is the first discharge state, it is determined that the battery capacity calculation formula corresponding to the battery is u=ocv (SOC, T) -i×r (SOC, T), and the found corresponding capacity calculation parameter is substituted into the battery capacity calculation formula to perform calculation. Similarly, if the discharge state of the battery is determined to be the second discharge state, determining that the battery capacity calculation formula corresponding to the battery is u=ocv (SOC, t+Δt) -i×r (SOC, t+Δt), and substituting the found corresponding capacity calculation parameter into the battery capacity calculation formula to perform calculation.
S105, calculating the battery cut-off capacity of the battery according to the capacity calculation parameter and the battery capacity calculation formula.
The battery cut-off capacity is the capacity corresponding to the actual battery power consumption, and because of the battery loss or aging and other reasons, the capacity corresponding to the actual battery power consumption is not 0%, i.e. the battery is not powered off until the capacity reaches 0%, but is powered off when the capacity is 10% or 20%, so that the present application needs to accurately find the capacity corresponding to the actual battery power consumption, so that the early warning of the power consumption of the user can be accurately and early performed.
Specifically, the found capacity calculation parameters can be substituted into the corresponding battery capacity calculation formulas to perform iterative calculation, so that the battery cut-off capacity of the battery can be accurately obtained.
In some embodiments, based on a preset target value searching algorithm, performing iterative computation on the battery capacity calculation formula according to the capacity calculation parameter to obtain the battery cut-off capacity of the battery. Therefore, the battery cut-off capacity of the battery can be accurately obtained through iterative calculation.
The target value searching algorithm may comprise any suitable mathematical algorithm such as a dichotomy.
Specifically, based on a preset target value searching algorithm, the capacity calculation parameter and the multiple different battery cut-off capacities are substituted, so that iterative calculation is continuously performed on the battery capacity calculation formula until the calculated voltage value meets the corresponding voltage cut-off condition.
By way of example, based on a preset target value searching algorithm, the capacity calculation parameter and a plurality of different battery cut-off capacities are substituted, so that iterative calculation is continuously performed on the battery capacity calculation formula until the calculated voltage value is smaller than or equal to the cut-off voltage.
For example, if the discharge state of the battery is the first discharge state, the battery capacity calculation formula corresponding to the battery is determined to be u=ocv (SOC, T) -i×r (SOC, T), if the substituted battery cutoff capacity is 30%, and the found corresponding capacity calculation parameter is substituted into the battery capacity calculation formula to calculate, so as to obtain u=ocv (30%, T) -i×r (30%, T) =3050 mV, and if the cutoff voltage is 3000mV, the cutoff voltage is greater than the calculated voltage value, so that the battery cutoff capacity is 30% and does not satisfy the voltage cutoff condition, and therefore, iterative calculation is further required until the calculated voltage value is less than or equal to the cutoff voltage.
Exemplary, if the discharge state of the battery is the second discharge state, determining the battery corresponding to the batteryThe capacity calculation formula is u=ocv (SOC, t+Δt) -i×r (SOC, t+Δt), the cut-off capacity of the substituted battery is predicted to be 20%, and the found corresponding capacity calculation parameter is substituted into the battery capacity calculation formula to calculate, thereby calculating
If the cutoff voltage is 3000mV, the cutoff voltage is exactly equal to the calculated voltage value, so that the battery cutoff capacity is 20% satisfying the voltage cutoff condition, and thus the battery cutoff capacity is 20%. Therefore, the battery cut-off capacity of the battery is not 0%, but 20%, and the battery cut-off capacity can be utilized to early warn the user of electric quantity exhaustion in advance, and the battery cut-off capacity can be converted.
As shown in fig. 4, the method for predicting the cut-off capacity of the battery provided in the embodiment of the present application may be applied to the application environment shown in fig. 2. The application environment includes a terminal device 110 and a server 120, where the terminal device 110 may communicate with the server 120 through a network. Specifically, the server 120 acquires a battery temperature parameter and a battery capacity parameter of the battery in the terminal device 110; determining a battery discharge parameter and a capacity calculation parameter of the battery according to the battery temperature parameter and the battery capacity parameter; determining the discharge state of the battery according to the battery discharge parameters; determining a battery capacity calculation formula corresponding to the battery according to the discharge state; and calculating the battery cut-off capacity of the battery according to the capacity calculation parameter and the battery capacity calculation formula, and transmitting the corresponding battery cut-off capacity to the terminal equipment 110. The server 120 may be an independent server, or may be a cloud server that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (Content Delivery Network, CDN), and basic cloud computing services such as big data and artificial intelligence platforms. The terminal device 110 may be, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, a smart speaker, a smart watch, etc. The terminal and the server may be directly or indirectly connected through wired or wireless communication, which is not limited herein.
Referring to fig. 5, fig. 5 is a schematic block diagram of a terminal device according to an embodiment of the present application. As shown in fig. 5, the terminal device 200 includes one or more processors 201 and a memory 202, and the processors 201 and the memory 202 are connected by a bus, such as an I2C (Inter-integrated Circuit) bus.
Wherein the one or more processors 201, working individually or together, are adapted to perform the steps of the method for predicting the cut-off capacity of a battery provided by the above embodiments.
Specifically, the processor 201 may be a Micro-controller Unit (MCU), a central processing Unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP), or the like.
Specifically, the Memory 202 may be a Flash chip, a Read-Only Memory (ROM) disk, an optical disk, a U-disk, a removable hard disk, or the like.
The processor 201 is configured to execute a computer program stored in the memory 202, and implement the steps of the method for predicting the battery cut-off capacity provided in the above embodiment when the computer program is executed.
The processor 201 is for example configured to run a computer program stored in the memory 202 and when said computer program is executed to implement the steps of:
acquiring a battery temperature parameter and a battery capacity parameter of the battery; determining a battery discharge parameter and a capacity calculation parameter of the battery according to the battery temperature parameter and the battery capacity parameter; determining the discharge state of the battery according to the battery discharge parameters; determining a battery capacity calculation formula corresponding to the battery according to the discharge state; and calculating the battery cut-off capacity of the battery according to the capacity calculation parameter and the battery capacity calculation formula.
In some embodiments, the battery temperature parameter comprises a battery initial temperature and a battery discharge temperature, and the battery capacity parameter comprises a battery initial capacity and a battery discharge capacity; the processor is configured to, when implementing the acquiring the battery temperature parameter and the battery capacity parameter of the battery, implement: acquiring a battery temperature in the battery standing state as the battery initial temperature, and acquiring a battery capacity in the battery standing state as the battery initial capacity; and after the battery is discharged for a preset time, acquiring the battery temperature of the battery as the battery discharge temperature, and acquiring the battery capacity of the battery as the battery discharge capacity.
In some embodiments, the processor, when implementing the determining the battery discharge parameter of the battery according to the battery temperature parameter and the battery capacity parameter, is configured to implement: determining the temperature variation of the battery according to the battery temperature parameter; determining the capacity variation of the battery according to the battery capacity parameter; and determining the temperature capacity change ratio of the battery according to the temperature change amount and the capacity change amount, and taking the temperature capacity change ratio as the battery discharge parameter.
In some embodiments, the processor, when implementing the determining the discharge state of the battery according to the battery discharge parameter, is configured to implement: if the temperature capacity change ratio is a non-positive number, determining that the discharge state of the battery is a first discharge state; and if the temperature capacity change ratio is positive, determining that the discharge state of the battery is a second discharge state.
In some embodiments, the processor, when implementing the determining the capacity calculation parameter of the battery according to the battery temperature parameter and the battery capacity parameter, is configured to implement: determining a discharge cut-off point of the battery, acquiring the battery temperature of the battery at the discharge cut-off point as a target battery temperature, and acquiring the battery capacity of the battery at the discharge cut-off point as a target battery capacity; and determining a corresponding capacity calculation parameter of the battery at the target battery temperature and the target battery capacity.
In some embodiments, the capacity calculation parameters include an open circuit voltage value, a current value, and a resistance value.
In some embodiments, when implementing the battery capacity calculation formula corresponding to the battery according to the discharge state determination, the processor is configured to implement: if the discharge state of the battery is the first discharge state, the battery capacity calculation formula corresponding to the battery is u=ocv (SOC, T) -i×r (SOC, T); if the discharge state of the battery is the second discharge state, the battery capacity calculation formula corresponding to the battery is u=ocv (SOC, t+Δt) -i×r (SOC, t+Δt); wherein U is a cut-off voltage value, OCV (SOC, T) is an open circuit voltage value at the target battery temperature and the target battery capacity, I is a current value at the target battery temperature and the target battery capacity, and R (SOC, T) is a resistance value at the target battery temperature and the target battery capacity; delta T is the predicted change in temperature.
In some embodiments, the processor, when implementing the calculating the battery cutoff capacity of the battery according to the capacity calculation parameter and the battery capacity calculation formula, is configured to implement: and carrying out iterative computation on the battery capacity calculation formula according to the capacity calculation parameters based on a preset target value searching algorithm to obtain the battery cut-off capacity of the battery.
The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, the computer program comprises program instructions, and the processor executes the program instructions to realize the method for predicting the cut-off capacity of any battery provided by the embodiment of the application.
The computer readable storage medium may be an internal storage unit of the computer device according to the foregoing embodiment, for example, a hard disk or a memory of the computer device. The computer readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like, which are provided on the computer device.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method for predicting the cut-off capacity of a battery, the method comprising:
acquiring a battery temperature parameter and a battery capacity parameter of the battery;
determining a battery discharge parameter and a capacity calculation parameter of the battery according to the battery temperature parameter and the battery capacity parameter;
determining the discharge state of the battery according to the battery discharge parameters;
determining a battery capacity calculation formula corresponding to the battery according to the discharge state;
and calculating the battery cut-off capacity of the battery according to the capacity calculation parameter and the battery capacity calculation formula.
2. The method of claim 1, wherein the battery temperature parameter comprises a battery initial temperature and a battery discharge temperature, and the battery capacity parameter comprises a battery initial capacity and a battery discharge capacity; the obtaining the battery temperature parameter and the battery capacity parameter of the battery comprises the following steps:
acquiring a battery temperature in the battery standing state as the battery initial temperature, and acquiring a battery capacity in the battery standing state as the battery initial capacity;
and after the battery is discharged for a preset time, acquiring the battery temperature of the battery as the battery discharge temperature, and acquiring the battery capacity of the battery as the battery discharge capacity.
3. The method of claim 1, wherein said determining a battery discharge parameter of said battery based on said battery temperature parameter and said battery capacity parameter comprises:
determining the temperature variation of the battery according to the battery temperature parameter;
determining the capacity variation of the battery according to the battery capacity parameter;
and determining the temperature capacity change ratio of the battery according to the temperature change amount and the capacity change amount, and taking the temperature capacity change ratio as the battery discharge parameter.
4. A method according to claim 3, wherein said determining the discharge state of the battery based on the battery discharge parameter comprises:
if the temperature capacity change ratio is a non-positive number, determining that the discharge state of the battery is a first discharge state;
and if the temperature capacity change ratio is positive, determining that the discharge state of the battery is a second discharge state.
5. The method of claim 1, wherein said determining a capacity calculation parameter of said battery based on said battery temperature parameter and said battery capacity parameter comprises:
determining a discharge cut-off point of the battery, acquiring the battery temperature of the battery at the discharge cut-off point as a target battery temperature, and acquiring the battery capacity of the battery at the discharge cut-off point as a target battery capacity;
and determining a corresponding capacity calculation parameter of the battery at the target battery temperature and the target battery capacity.
6. The method of claim 5, wherein the capacity calculation parameters include an open circuit voltage value, a current value, and a resistance value.
7. The method of claim 1, wherein determining a battery capacity calculation formula corresponding to the battery according to the discharge state comprises:
if the discharge state of the battery is the first discharge state, the battery capacity calculation formula corresponding to the battery is u=ocv (SOC, T) -i×r (SOC, T);
if the discharge state of the battery is the second discharge state, the battery capacity calculation formula corresponding to the battery is u=ocv (SOC, t+Δt) -i×r (SOC, t+Δt);
wherein U is a cut-off voltage value, OCV (SOC, T) is an open circuit voltage value at the target battery temperature and the target battery capacity, I is a current value at the target battery temperature and the target battery capacity, and R (SOC, T) is a resistance value at the target battery temperature and the target battery capacity; delta T is the predicted change in temperature.
8. The method according to claim 1, wherein the calculating the battery cutoff capacity of the battery according to the capacity calculation parameter and the battery capacity calculation formula includes:
and carrying out iterative computation on the battery capacity calculation formula according to the capacity calculation parameters based on a preset target value searching algorithm to obtain the battery cut-off capacity of the battery.
9. A terminal device, characterized in that the terminal device comprises a memory and a processor;
the memory is used for storing a computer program;
the processor is configured to execute the computer program and implement the method for predicting the battery cut-off capacity according to any one of claims 1 to 8 when the computer program is executed.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, causes the processor to implement the method of predicting the battery cut-off capacity according to any one of claims 1 to 8.
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| CN117347869B (en) * | 2023-12-04 | 2024-03-01 | 深圳三晖能源科技有限公司 | Data analysis method and device for energy storage battery management system, electronic equipment and medium |
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