CN117310507B - Charging cut-off current estimation method, device, equipment and medium - Google Patents

Charging cut-off current estimation method, device, equipment and medium Download PDF

Info

Publication number
CN117310507B
CN117310507B CN202311606389.XA CN202311606389A CN117310507B CN 117310507 B CN117310507 B CN 117310507B CN 202311606389 A CN202311606389 A CN 202311606389A CN 117310507 B CN117310507 B CN 117310507B
Authority
CN
China
Prior art keywords
impedance
charging
cut
charging mode
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202311606389.XA
Other languages
Chinese (zh)
Other versions
CN117310507A (en
Inventor
罗明杰
周平
熊海峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Taisi Microelectronics Co ltd
Original Assignee
Shanghai Taisi Microelectronics Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Taisi Microelectronics Co ltd filed Critical Shanghai Taisi Microelectronics Co ltd
Priority to CN202311606389.XA priority Critical patent/CN117310507B/en
Publication of CN117310507A publication Critical patent/CN117310507A/en
Application granted granted Critical
Publication of CN117310507B publication Critical patent/CN117310507B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • 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
    • 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]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • 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]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H02J7/0049—Detection of fully charged condition
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The charge cut-off current estimation method, the device, the equipment and the medium provided by the embodiment of the invention have the following beneficial effects: by establishing an impedance relation table; when charging starts, calculating a charging cut-off current according to the first cut-off voltage, the first open-circuit voltage and the first impedance which are inquired from the impedance relation table; after the charging current reaches the charging cut-off current and the charging time is longer than the time threshold corresponding to the charging mode, after the preset standing time, calculating the second impedance at the second ambient temperature according to the first cut-off voltage, the charging cut-off current and the obtained standing battery voltage, and updating the second impedance to the impedance relation table. The invention establishes the corresponding relation of the ambient temperature, the open-circuit voltage, the charge cut-off current and the impedance, and dynamically iterates in the whole life cycle, thereby realizing the timely update of the charge cut-off current along with the state of the battery, effectively improving the estimation precision, further realizing the accurate control of the battery and ensuring the endurance capacity of the battery.

Description

Charging cut-off current estimation method, device, equipment and medium
Technical Field
The present invention relates to the field of battery management, and in particular, to a method, apparatus, device, and medium for estimating a charging cutoff current.
Background
The battery quick charge is always a research hot spot in the battery management direction, and in practical application, on one hand, the quick charge is performed in a mode of increasing charging current; on one hand, the constant voltage charging process time is reduced by providing the charging voltage; more is the way to increase the charging current and provide the constant current phase charging voltage at the same time.
However, during the full life cycle of the battery, the charge cutoff current of the battery is preset in advance, whether in the fast charge mode or in the slow charge mode, which may lead to that the battery may terminate charging in advance when the battery ages, resulting in a reduced charge capacity, a less full charge condition, and a reduced battery cruising ability.
As can be seen from the above description, the current charge cutoff current of the battery cannot be accurately estimated, and how to improve the estimation accuracy of the charge cutoff current is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In order to overcome the defect of poor precision of the existing charge cut-off current estimation method, the invention provides a charge cut-off current estimation method, a device, equipment and a medium.
In order to achieve the above object, according to a first aspect of the present invention, an embodiment of the present invention provides a charge cutoff current estimation method, including the steps of:
At a reference ambient temperature, venting the battery;
filling according to a charging mode, wherein the charging mode comprises a fast charging mode and/or a slow charging mode;
standing the battery for a period of time to obtain an open-circuit voltage of a corresponding charging mode;
calculating the impedance of the corresponding charging mode according to the open circuit voltage, the cut-off voltage and the charging cut-off current of the corresponding charging mode, and establishing an impedance relation table, wherein the impedance relation table comprises the corresponding relation of the charging mode, the reference environment temperature, the open circuit voltage, the charging cut-off current and the impedance;
determining a charging mode when charging starts;
inquiring a first cut-off voltage, a first open-circuit voltage and a first impedance corresponding to a first ambient temperature in the charging mode from an impedance relation table;
calculating a charging cut-off current according to the first cut-off voltage, the first open-circuit voltage and the first impedance obtained by inquiry;
when the charging current reaches the charging cut-off current and the charging time is longer than a time threshold corresponding to the charging mode, obtaining the voltage of the stationary battery after the preset stationary time;
calculating a second impedance at a second ambient temperature according to the first cutoff voltage, the charge cutoff current and the acquired stationary battery voltage;
And updating the second impedance to a data item corresponding to both the second ambient temperature and the charging mode in the impedance relation table for charging cut-off current estimation.
Optionally, the charging cut-off current is calculated according to the first cut-off voltage and the first open-circuit voltage and the first impedance obtained by inquiry, and is calculated by the following formula:
wherein,represents the charge off-current corresponding to the charge mode,a first cut-off voltage corresponding to the charging mode is indicated,a first open circuit voltage corresponding to the charging mode is indicated,the first impedance corresponding to the charging mode is represented.
Optionally, the calculating the second impedance at the second ambient temperature according to the first cut-off voltage, the charging cut-off current and the obtained standing battery voltage is calculated by the following formula:
wherein,representing a second impedance corresponding to the charging mode,a second cut-off voltage corresponding to the charging mode is indicated,represents the charge off-current corresponding to the charge mode,the stationary battery voltage corresponding to the charging mode is indicated.
Optionally, updating the second impedance to a data item in the impedance relation table corresponding to both a second ambient temperature and a charging mode includes:
Determining a reference temperature segment of the second ambient temperature in the impedance relationship table, the reference temperature segment comprising a first reference temperature and a second reference temperature, the first reference temperature being less than the second reference temperature, the second ambient temperature being intermediate the first reference temperature and the second reference temperature;
updating the second impedance to a data item of the first reference temperature, the corresponding charging mode when the second ambient temperature is less than half of the sum of the first reference temperature and the second reference temperature;
and updating the second impedance to the data item of the second reference temperature and the corresponding charging mode when the second ambient temperature is greater than or equal to half of the first reference temperature and the second reference temperature.
According to a second aspect of the present invention, an embodiment of the present invention further provides a charging off-current estimation device, including:
the meter building module is used for emptying the battery at the reference ambient temperature; filling according to a charging mode, wherein the charging mode comprises a fast charging mode and/or a slow charging mode; standing the battery for a period of time to obtain an open-circuit voltage of a corresponding charging mode; calculating the impedance of the corresponding charging mode according to the open circuit voltage, the cut-off voltage and the charging cut-off current of the corresponding charging mode, and establishing an impedance relation table, wherein the impedance relation table comprises the corresponding relation of the charging mode, the reference environment temperature, the open circuit voltage, the charging cut-off current and the impedance;
The judging module is used for determining a charging mode when charging starts;
the query module is used for querying a first cut-off voltage, a first open-circuit voltage and a first impedance corresponding to a first environment temperature in the charging mode from an impedance relation table;
the charging cut-off current calculation module is used for calculating the charging cut-off current according to the first cut-off voltage, the first open-circuit voltage and the first impedance obtained through inquiry;
the detection module is used for obtaining the voltage of the stationary battery after the charging current reaches the charging cut-off current and the charging time is longer than the time threshold corresponding to the charging mode and the preset stationary time is passed;
the impedance calculation module is used for calculating a second impedance at a second environment temperature according to the first cut-off voltage, the charging cut-off current and the obtained standing battery voltage;
and the updating module is used for updating the second impedance into the impedance relation table, and the updating module is used for estimating the charging cut-off current according to data items corresponding to the second ambient temperature and the charging mode.
Optionally, the charge cutoff current calculation module calculates the charge cutoff current according to the following formula:
wherein,represents the charge off-current corresponding to the charge mode, A first cut-off voltage corresponding to the charging mode is indicated,a first open circuit voltage corresponding to the charging mode is indicated,the first impedance corresponding to the charging mode is represented.
Optionally, the impedance calculating module calculates the second impedance by the following formula:
wherein,representing a second impedance corresponding to the charging mode,a second cut-off voltage corresponding to the charging mode is indicated,new represents the charge cutoff current corresponding to the charge mode,the stationary battery voltage corresponding to the charging mode is indicated.
Optionally, the updating module is further configured to:
determining a reference temperature segment of the second ambient temperature in the impedance relationship table, the reference temperature segment comprising a first reference temperature and a second reference temperature, the first reference temperature being less than the second reference temperature, the second ambient temperature being intermediate the first reference temperature and the second reference temperature;
updating the second impedance to a data item of the first reference temperature, the corresponding charging mode when the second ambient temperature is less than half of the sum of the first reference temperature and the second reference temperature;
and updating the second impedance to the data item of the second reference temperature and the corresponding charging mode when the second ambient temperature is greater than or equal to half of the first reference temperature and the second reference temperature.
According to a third aspect of the present invention, an embodiment of the present invention further provides an electronic device, including a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the charge cutoff current estimation method as in any of the above embodiments when the processor executes the computer program.
According to a fourth aspect of the present invention, an embodiment of the present invention further provides a storage medium having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, the at least one instruction, the at least one program, the set of codes, or the set of instructions being loaded and executed by a processor to implement the steps of the charge cutoff current estimation method as in any of the above embodiments.
As described above, the method, device, equipment and medium for estimating the charge cut-off current provided by the embodiment of the invention have the following beneficial effects: venting the battery by venting the battery at a reference ambient temperature; filling according to a charging mode, wherein the charging mode comprises a fast charging mode and/or a slow charging mode; standing the battery for a period of time to obtain an open-circuit voltage of a corresponding charging mode; calculating the impedance of the corresponding charging mode according to the open-circuit voltage, the charging cut-off voltage and the charging cut-off current of the corresponding charging mode, and establishing an impedance relation table, wherein the impedance relation table comprises the corresponding relation of the charging mode, the reference environment temperature, the open-circuit voltage, the charging cut-off current and the impedance; determining a charging mode when charging starts; inquiring a first cut-off voltage, a first open-circuit voltage and a first impedance corresponding to a first ambient temperature in the charging mode from an impedance relation table; calculating a charging cut-off current according to the first cut-off voltage, the first open-circuit voltage and the first impedance which are obtained through inquiry; when the charging current reaches the charging cut-off current and the charging time is longer than a time threshold corresponding to the charging mode, obtaining the voltage of the stationary battery after the preset stationary time; calculating a second impedance at a second ambient temperature according to the first cutoff voltage, the charge cutoff current and the acquired stationary battery voltage; and updating the second impedance to a data item corresponding to the second ambient temperature and the charging mode in the impedance relation table for charging cut-off current estimation. The invention establishes the corresponding relation of the ambient temperature, the open-circuit voltage, the charging cut-off current and the impedance, and dynamically and iteratively updates the battery in the whole life cycle of the battery, so that the charging cut-off current is updated timely along with the state of the battery, the calculation precision is effectively improved, the accurate control of the battery is further realized, and the cruising ability of the battery is ensured.
Drawings
Fig. 1 is a schematic flow chart of a charge cut-off current estimation method according to an embodiment of the present invention;
fig. 2 is a flow chart of a method for establishing an impedance relationship table according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating an updating method of an impedance relation table according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a charge cutoff current estimation device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware structure of an electronic device for executing a charge cutoff current estimation method according to an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Please refer to fig. 1 to 5. It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings rather than the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
The method for estimating the charge cutoff current in the embodiment of the invention can be applied to an electricity meter chip, and the terminal product of the method can be an energy storage system such as a 3C electronic system, a new energy automobile and a wind-light electric storage system, and of course, the application fields are only described by way of example, and the scheme of the invention is applicable to other scenes in which the charge cutoff current is required to be estimated and the battery charge is controlled to be ended through the charge cutoff current, and is not repeated in the embodiment of the invention.
For the sake of clarity of the description of the technical solution of the present invention, the technical background of the charging off-current is first described in the present invention, so as to facilitate understanding of the specific solution of the present invention. When the battery is charged, there are typically two charging modes, a standard charging mode, i.e., a slow charging mode as is commonly understood, and a fast charging mode.
The slow charging mode is to charge to the cut-off voltage of 4.45V by constant current of 2A current, and the constant voltage is kept until the current is less than or equal to the charge cut-off current of 0.2A as the end of charging.
The fast charging mode is to charge to 4.2V with 12.4A current constant current, keep constant voltage until the current is less than or equal to 8A, then charge to 4.3V with 8A constant current, keep constant voltage until the current is less than or equal to 6.6A, then charge to 4.4V with 6.6A constant current, keep constant voltage until the current is less than or equal to 5A, then charge to cut-off voltage 4.48V with 5A constant current, keep constant voltage until the current is less than or equal to charging cut-off current 0.8A as the end of charging.
The mobile phone can be charged quickly only by a special charger in the use process, and both quick charging and slow charging in the charging process by using different chargers can occur. The judgment for 100% full charge causes different judgment conditions. The general fuel gauge chip can provide charging current and charging voltage of the battery and full charge state to the terminal or the charger terminal for charging data request, and the charger can provide charging current according to the request data. For a new battery, the charge capacities for the above example slow and fast charge remain the same, but for an increase in the impedance of an aged battery, the battery fills with more capacity.
Of course, it should be noted that the above description of the usage scenario is only an exemplary description, and the embodiment of the present invention may also be applied to other scenarios in which the end of charging of the battery is controlled by the charging cut-off current, which is not repeated in the embodiment of the present invention.
Referring to fig. 1, a schematic flow diagram of a charge cutoff current estimation method according to an embodiment of the present invention is shown in fig. 1, where the embodiment of the present invention shows a flow of the charge cutoff current estimation method.
Step S101: and establishing an impedance relation table.
Referring to fig. 2, a flow chart of an impedance relation table establishing method according to an embodiment of the present invention is shown in fig. 2, where the embodiment of the present invention shows a flow chart of the impedance relation table establishing method.
Step S1011: at the reference ambient temperature, the battery is vented.
At the reference ambient temperature, the battery is discharged according to the standard discharging mode provided by the specification, and the battery electricity is discharged. Of course, in implementation, the temperature control device can set and maintain the environment of the battery below one or more environmental temperatures, so as to acquire data of different reference environmental temperatures.
Step S1012: the charging mode is full according to a charging mode, and the charging mode comprises a fast charging mode and/or a slow charging mode.
In a specific implementation, when the charging mode includes a fast charging mode and a slow charging mode, the relevant data in the slow charging mode may be acquired first, and of course, the charging mode may also be started first. Alternatively, when the charging modes include other charging modes, corresponding operations may be performed for each charging mode, and the embodiments of the present invention are exemplarily described in a fast charging mode and a slow charging mode.
When the charging mode is a slow charging mode, the battery is fully charged according to the slow charging mode, the cut-off voltage in the slow charging mode is 4.45V, the constant current charging current is 2000mA, the charging cut-off current in the slow charging mode is 200mA, and the charging capacity CN_Norm is recorded.
When the charging mode is the fast charging mode, the battery is fully charged according to the fast charging mode, the charging capacity is counted until the charging capacity is CN_Norm, the charging is stopped by recording the charging cut-off current CurFastfull in the fast charging mode at the moment, wherein the charging cut-off voltage in the fast charging mode is VoltFastfull=4.48V.
Step S1013: and standing the battery for a period of time, and obtaining the open-circuit voltage of the corresponding charging mode.
In the embodiment of the present invention, the period of time for the standing may be set to 2 hours, and of course, the period of time may be set to any other range, which is not limited in the present invention.
According to the description of the above steps, the slow charge mode used before is used for charging, and then the open circuit voltage OCVFull in the slow charge mode is obtained.
Step S1014: according to the open circuit voltage, the cut-off voltage and the charge cut-off current of the corresponding charging modes, calculating the impedance of the corresponding charging modes, and establishing an impedance relation table, wherein the impedance relation table comprises the corresponding relation of the charging modes, the reference environment temperature, the open circuit voltage, the charge cut-off current and the impedance.
In practice, the impedance calculation can be obtained by the following formula.
When the charging mode is a slow charging mode, the impedance corresponding to the slow charging mode is as follows:
wherein,representing the impedance in the slow charge mode,indicating the cut-off voltage in the slow charge mode,indicating the open circuit voltage in the slow charge mode,indicating the charge off current in the slow charge mode.
In an exemplary embodiment, the reference ambient temperature is 15 ℃, the charge cutoff current in the slow charge mode is 200mA, the open circuit voltage is 4.433V, and the cutoff voltage in the slow charge mode is 4.45V, then the impedance in the slow charge mode is calculated to be 0.085 Ω.
When the charging mode is the fast charging mode, the impedance corresponding to the fast charging mode is as follows:
wherein,representing the impedance in the fast charge mode,indicating the cut-off voltage in the fast charge mode,for the open circuit voltage measured by the slow charge mode in the previous step,is the charge off current in the fast charge mode.
In an exemplary embodiment, also taking the reference environmental temperature of 15 ℃ as an example, the charge cutoff current in the fast charge mode is 0.6A as described above, the open circuit voltage is 4.433V, and the cutoff voltage in the fast charge mode is 4.48V, so that the impedance in the fast charge mode is 0.078333333 Ω.
It should be noted that, in the embodiment of the present invention, when the charging mode includes the slow charging mode and the fast charging mode, steps S1011 to S1014 are executed from the slow charging mode, then the fast charging mode is executed, steps S1011 to S1014 are repeatedly executed, if the data at different reference ambient temperatures are obtained, corresponding reference ambient temperatures are set, and the steps described above are repeatedly executed, so as to obtain the impedance relationship table at different temperatures and different charging modes. An exemplary impedance relationship table is shown in the table below, in which the open circuit voltage, the charge cutoff current, and the impedance corresponding to the fast charge mode and the slow charge mode, respectively, are shown with reference to the ambient temperature of 15 ℃, 25 ℃, and 45 ℃.
Temperature (. Degree. C.) Open circuit voltage OCVFull (V) Charging cut-off current of slow charge mode (A) Impedance of slow charge mode (omega) Fast charging mode charge cut-off current (A) Fast charge mode impedance (omega)
15 4.433 0.2 0.085 0.6 0.078333333
25 4.439 0.2 0.055 0.8 0.05125
45 4.44 0.2 0.05 0.82 0.048780488
Step S102: when charging starts, a charging mode is determined.
After the impedance relation table is established through the steps, the charging control is performed according to the impedance relation table in the life cycle of the battery.
Specifically, when the battery charging starts, a charger is connected to acquire a charging mode. And distinguishing a fast charging mode or a slow charging mode according to the charging mode, wherein the fast charging means that the communication handshake between the charging management chip and the charging power supply management chip is successful. For the judgment of the charging mode, for the application scenario of the mobile phone, the mobile phone and the charging head have some communication protocols, such as a fast charging protocol, and the mobile phone and the charging head negotiate to determine a fast charging mode or a slow charging mode. And will not be described in detail in the implementation of the present invention.
Step S103: the first cut-off voltage, the first open-circuit voltage and the first impedance corresponding to the first ambient temperature in the charging mode are looked up from an impedance relation table.
In an exemplary embodiment, the first ambient temperature is 15 ℃.
When the charging mode is a slow charging mode, the first cut-off voltage corresponding to the slow charging mode is 4.45V. By looking up the impedance relationship table, the first open circuit voltage was 4.433V and the first impedance was 0.085 Ω.
Also, for the case where the charging mode is the fast charging mode, the first cut-off voltage corresponding to the fast charging mode is 4.48V. By looking up the impedance relationship table, the first open circuit voltage was 4.433V and the first impedance was 0.078333333 Ω.
Step S104: and calculating the charging cut-off current according to the first cut-off voltage, the first open-circuit voltage and the first impedance obtained by inquiry.
Based on the data obtained in the above steps, the charge cutoff current is further calculated by the following formula:
wherein CurFull represents a charging off current corresponding to the charging mode, voltFull represents a first off voltage corresponding to the charging mode, OCVFull represents a first open circuit voltage corresponding to the charging mode, and Risfull represents a first impedance corresponding to the charging mode.
In this way, specifically to the corresponding charging mode, for the case that the charging mode is the slow charging mode, the above formula can be rewritten as:
wherein the method comprises the steps ofIndicating the charge off current in the slow charge mode,a first cut-off voltage in the slow charge mode,representing a first open circuit voltage in the slow charge mode,representing the first impedance in the slow charge mode. Also specifically, when the first ambient temperature is 15 ℃, the first cut-off voltage of the slow charging mode is 4.45V, the first open-circuit voltage in the slow charging mode is checked to obtain 4.433V, the first impedance in the slow charging mode is 0.085 Ω, and thus the charging cut-off current in the slow charging mode is calculated by substituting the formula to obtain 0.2A.
For the case where the charging mode is the fast charging mode, the above formula can be rewritten as follows:
wherein the method comprises the steps ofIndicating the charge off current in the fast charge mode,for the first cut-off voltage in the fast charge mode,representing a first open circuit voltage in the fast charge mode,representing the first impedance in the fast charge mode. Also specifically, when the first ambient temperature is 15 ℃, the first cut-off voltage of the fast charging mode is 4.48V, the first open-circuit voltage in the fast charging mode is checked to obtain 4.433V, the first impedance in the fast charging mode is 0.078333333 Ω, and thus the charging cut-off current in the fast charging mode is calculated by substituting the formula to obtain 0.6A.
Of course, in the embodiment of the present invention, the open circuit voltages of the different charging modes may be the same value, and in the embodiment of the present invention, only the distinction is made for clarity of illustration.
Step S105: and when the charging current reaches the charging cut-off current and the charging time is longer than a time threshold corresponding to the charging mode, obtaining the voltage of the stationary battery after the preset stationary time.
In the embodiment of the invention, when the charging current reaches the charging cut-off current in the step, the charging is ended, the charging time from the start of the charging to the end of the charging is counted, and after the charging time is longer than a preset time threshold, the standing operation is executed.
Specifically, when the charging mode is the slow charging mode, a time threshold TimeNormThreshold corresponding to the slow charging mode may be preset. When the charging mode is the fast charging mode, a time threshold TimeFastThreshol corresponding to the fast charging mode may be preset. In a preferred embodiment, the time threshold of the slow charge mode, timeNormToreshold, and the time threshold of the fast charge mode, timeFastThreshold, are the time constants that allow the battery polarization reaction to complete.
After the battery charging current reaches the charging cut-off current of the corresponding mode and the charging time period is longer than the time threshold of the corresponding mode, the battery is allowed to stand for a preset standing time, which may be set to 2 hours, and the standing battery voltage VoltSam is obtained by measurement.
Step S106: and calculating a second impedance at a second ambient temperature according to the first cut-off voltage, the charging cut-off current and the obtained standing battery voltage.
In specific implementation, the current ambient temperature is obtained, and the second ambient temperature is used for representing, and the formulas of the calculated impedance of different modes at the second ambient temperature can be uniformly described as the following modes:
wherein,representing a second impedance corresponding to the charging mode,a second cut-off voltage corresponding to the charging mode is indicated, Represents the charge off-current corresponding to the charge mode,the stationary battery voltage corresponding to the charging mode is indicated.
Specifically, when the charging mode is the slow charging mode, the following formula may be rewritten specifically:
wherein,is the most recently calculated second impedance in the slow charge mode,is the second cut-off voltage in the slow charge mode, in this case the first cut-off voltage and the second cut-off voltage may be the same value of 4.45V according to the specification of the battery,is the rest battery voltage in the slow charge mode measured in the above step such as an aged battery value of 4.42V,the charging cut-off current in the slow charge mode calculated in the above step is 0.2A, so that substituting the above formula can obtain the updated second impedance corresponding to the slow charge mode to be 0.15Ω.
Also, for the case where the charge mode is the fast charge mode, the formula is expressed as follows:
wherein,is the most recently calculated second impedance in the fast charge mode,is the second cut-off voltage in the fast charge mode, in this case the first cut-off voltage and the second cut-off voltage may be the same value of 4.48V according to the specification of the battery,is the rest battery voltage in the fast charge mode measured in the above step such as an aged battery value of 4.4V, The charging cut-off current in the fast charging mode calculated in the above step is 0.6A, so that substituting the above formula can obtain the updated second impedance corresponding to the fast charging mode to be 0.13 Ω.
Step S107: and updating the second impedance to data items corresponding to the second environment temperature and the charging mode in the impedance relation table for charging cut-off current estimation.
And updating the second impedance under the second ambient temperature calculated in the step S106 into an impedance relation table, so that the impedance relation table is refreshed according to the steps after each charging, and the accuracy of the next charging cut-off current estimation is ensured through continuous iteration.
Referring to fig. 3, a flowchart of an impedance relation table updating method according to an embodiment of the present invention is shown in fig. 3, where the embodiment of the present invention shows a process of updating an impedance relation table.
Step S1061: determining a reference temperature segment of the second ambient temperature in the impedance relationship table, the reference temperature segment comprising a first reference temperature and a second reference temperature, and the first reference temperature being less than the second reference temperature, the second ambient temperature being intermediate the first reference temperature and the second reference temperature.
In an exemplary embodiment, also taking the impedance relation table determined in step S101 as an example, when the second ambient temperature is 21 ℃, the reference temperature segment is determined to be 15 ℃ to 25 ℃, including the first reference temperature 15 ℃, the second reference temperature 25 ℃, and the second ambient temperature belongs to the range of the reference temperature segment, that is, is between the first reference temperature and the second reference temperature.
Step S1062: and updating the second impedance to the data item of the first reference temperature and the corresponding charging mode when the second ambient temperature is less than half of the sum of the first reference temperature and the second reference temperature.
According to the description of the above steps, when the second ambient temperature is 16 ℃, it is also within the reference temperature range 15-25 ℃, i.e. between the first reference temperature 15 ℃ and the second reference temperature 25 ℃. Further calculating half of the sum of the first reference temperature and the second reference temperature, namely 20 ℃, if the second ambient temperature is smaller than the value of 20 ℃, the impedance corresponding to the second ambient temperature is set to the data item corresponding to the first reference temperature of 15 ℃, meanwhile, as the impedance relation table comprises two charging modes, the specific updating of the data corresponding to the slow charging mode or the data corresponding to the fast charging mode depends on the charging mode in which the second impedance is located according to the steps. Also in this example, if the second impedance is calculated in the slow charge mode, the data is updated to the impedance data item in the slow charge mode at the first reference temperature; if the second impedance is calculated in the fast recharge mode, the data is updated to the impedance data item in the fast recharge mode at the first reference temperature.
Step S1063: and updating the second impedance to the data item of the second reference temperature and the corresponding charging mode when the second ambient temperature is greater than or equal to half of the sum of the first reference temperature and the second reference temperature.
Similar to the above steps, when the second ambient temperature, for example, 21 ℃ is greater than the sum of the first reference temperature 15 ℃ and the second reference temperature 25 ℃, the second impedance at the second ambient temperature is updated to the data item corresponding to the second reference temperature 25 ℃, specifically to the slow charge mode corresponding data or the fast charge mode corresponding data, and the description of the above steps is also referred to, and will not be repeated herein.
As can be seen from the description of the above embodiments, the method for estimating the charging cut-off current according to the embodiments of the present invention is to empty the battery at the reference ambient temperature; filling according to a charging mode, wherein the charging mode comprises a fast charging mode and/or a slow charging mode; standing the battery for a period of time to obtain an open-circuit voltage of a corresponding charging mode; calculating the impedance of the corresponding charging mode according to the open-circuit voltage, the charging cut-off voltage and the charging cut-off current of the corresponding charging mode, and establishing an impedance relation table, wherein the impedance relation table comprises the corresponding relation of the charging mode, the reference environment temperature, the open-circuit voltage, the charging cut-off current and the impedance; determining a charging mode when charging starts; inquiring a first cut-off voltage, a first open-circuit voltage and a first impedance corresponding to a first ambient temperature in the charging mode from an impedance relation table; calculating a charging cut-off current according to the first cut-off voltage, the first open-circuit voltage and the first impedance which are obtained through inquiry; when the charging current reaches the charging cut-off current and the charging time is longer than a time threshold corresponding to the charging mode, obtaining the voltage of the stationary battery after the preset stationary time; calculating a second impedance at a second ambient temperature according to the first cutoff voltage, the charge cutoff current and the acquired stationary battery voltage; updating the second impedance to a data item in the impedance relation table corresponding to a second ambient temperature for use in charge cutoff current estimation. The invention establishes the corresponding relation of the ambient temperature, the open-circuit voltage, the charging cut-off current and the impedance, and dynamically and iteratively updates the battery in the whole life cycle of the battery, so that the charging cut-off current is updated timely along with the state of the battery, the calculation precision is effectively improved, the accurate control of the battery is further realized, and the cruising ability of the battery is ensured.
From the above description of the method embodiments, it will be clear to those skilled in the art that the present invention may be implemented by means of software plus necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on this understanding, the technical solution of the present invention may be embodied essentially or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: read Only Memory (ROM), random Access Memory (RAM), magnetic or optical disks, and the like.
An embodiment of the present invention provides a non-volatile computer storage medium storing computer-executable instructions that can perform the charge cutoff current estimation method in any of the above-described method embodiments.
Corresponding to the embodiment of the charge cut-off current estimation method provided by the invention, the invention also provides a charge cut-off current estimation device.
Referring to fig. 4, a schematic structural diagram of a charge cutoff current estimation device according to an embodiment of the present invention is shown, where the device includes:
a table building module 11 for emptying the battery at a reference ambient temperature; filling according to a charging mode, wherein the charging mode comprises a fast charging mode and/or a slow charging mode; standing the battery for a period of time to obtain an open-circuit voltage of a corresponding charging mode; according to the open circuit voltage, the cut-off voltage and the charge cut-off current of the corresponding charging modes, calculating the impedance of the corresponding charging modes, and establishing an impedance relation table, wherein the impedance relation table comprises the corresponding relation of the charging modes, the reference environment temperature, the open circuit voltage, the charge cut-off current and the impedance.
A judging module 12 for determining a charging mode when charging is started.
A query module 13, configured to query, from an impedance relation table, a first cutoff voltage, a first open-circuit voltage, and a first impedance corresponding to a first ambient temperature in the charging mode;
the charge cut-off current calculation module 14 is configured to calculate a charge cut-off current according to the first cut-off voltage, the first open-circuit voltage obtained by the query, and the first impedance;
The detection module 15 is configured to obtain a voltage of the stationary battery after a preset stationary time elapses after the charging current reaches a charging cutoff current and the charging time is longer than a time threshold corresponding to the charging mode;
an impedance calculation module 16 for calculating a second impedance at a second ambient temperature based on the first cutoff voltage, the charge cutoff current, and the acquired stationary battery voltage;
an updating module 17, configured to update the second impedance to a data item corresponding to a second ambient temperature in the impedance relation table, for use in charging off-current estimation.
Alternatively, the charge cutoff current calculation module 14 calculates the charge cutoff current by the following formula:
wherein,represents the charge off-current corresponding to the charge mode,a first cut-off voltage corresponding to the charging mode is indicated,a first open circuit voltage corresponding to the charging mode is indicated,the first impedance corresponding to the charging mode is represented.
Optionally, the impedance calculation module 16 calculates the second impedance by the following formula:
wherein,representing a second impedance corresponding to the charging mode,a second cut-off voltage corresponding to the charging mode is indicated,represents the charge off-current corresponding to the charge mode, The stationary battery voltage corresponding to the charging mode is indicated.
Optionally, the updating module 17 is further configured to determine a reference temperature segment of the second ambient temperature in the impedance relation table, where the reference temperature segment includes a first reference temperature and a second reference temperature, and the first reference temperature is less than the second reference temperature, and the second ambient temperature is between the first reference temperature and the second reference temperature; updating the second impedance to a data item of the first reference temperature, the corresponding charging mode when the second ambient temperature is less than half of the sum of the first reference temperature and the second reference temperature; and updating the second impedance to the data item of the second reference temperature and the corresponding charging mode when the second ambient temperature is greater than or equal to half of the first reference temperature and the second reference temperature.
Fig. 5 is a schematic hardware structure of an electronic device for performing a charge cutoff current estimation method according to an embodiment of the present invention, as shown in fig. 5, where the device includes:
one or more processors 510 and a memory 520, one processor 510 being illustrated in fig. 5.
The apparatus for performing the charge cutoff current estimation method may further include: an input device 530 and an output device 540.
The processor 510, memory 520, input device 530, and output device 540 may be connected by a bus or other means, for example in fig. 5.
The memory 520 is a non-volatile computer readable storage medium, and may be used to store a non-volatile software program, a non-volatile computer executable program, and a module, such as program instructions/modules corresponding to the charge cutoff current estimation method in the embodiment of the present invention (for example, the table building module 11, the judging module 12, the query module 13, the charge cutoff current calculating module 14, the detecting module 15, the impedance calculating module 16, and the updating module 17 shown in fig. 4). The processor 510 executes various functional applications of the server and data processing by running non-volatile software programs, instructions and modules stored in the memory 520, i.e., implements the charge cutoff current estimation method of the above-described method embodiment.
Memory 520 may include a storage program area that may store an operating system, at least one application program required for functionality, and a storage data area; the storage data area may store data created from the use of the processing device of the charge cut-off current estimation, and the like. In addition, memory 520 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 520 may optionally include memory located remotely from processor 510, which may be connected to the processing means for charge cutoff current estimation via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 530 may receive input numeric or character information and generate key signal inputs related to user settings and function control of the processing device for charge cutoff current estimation. The output 540 may include a display device such as a display screen.
The one or more modules are stored in the memory 520 that, when executed by the one or more processors 510, perform the charge cutoff current estimation method in any of the method embodiments described above.
The product can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. Technical details not described in detail in this embodiment may be found in the methods provided in the embodiments of the present invention.
The electronic device of the embodiments of the present invention exists in a variety of forms including, but not limited to:
(1) A mobile communication device: such devices are characterized by mobile communication capabilities and are primarily aimed at providing voice, data communications. Such terminals include: smart phones (e.g., iPhone), multimedia phones, functional phones, and low-end phones, etc.
(2) Ultra mobile personal computer device: such devices are in the category of personal computers, having computing and processing functions, and generally also having mobile internet access characteristics. Such terminals include: PDA, MID, and UMPC devices, etc., such as iPad.
(3) Portable entertainment device: such devices may display and play multimedia content. The device comprises: audio, video players (e.g., iPod), palm game consoles, electronic books, and smart toys and portable car navigation devices.
(4) And (3) a server: the configuration of the server includes a processor, a hard disk, a memory, a system bus, and the like, and the server is similar to a general computer architecture, but is required to provide highly reliable services, and thus has high requirements in terms of processing capacity, stability, reliability, security, scalability, manageability, and the like.
(5) Other electronic devices with data interaction function.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, with reference to the description of method embodiments in part. The apparatus and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A charge cutoff current estimation method, characterized by comprising:
at a reference ambient temperature, venting the battery;
filling according to a charging mode, wherein the charging mode comprises a fast charging mode and/or a slow charging mode;
standing the battery for a period of time to obtain an open-circuit voltage of a corresponding charging mode;
calculating the impedance of the corresponding charging mode according to the open circuit voltage, the cut-off voltage and the charging cut-off current of the corresponding charging mode, and establishing an impedance relation table, wherein the impedance relation table comprises the corresponding relation of the charging mode, the reference environment temperature, the open circuit voltage, the charging cut-off current and the impedance;
determining a charging mode when charging starts;
inquiring a first cut-off voltage, a first open-circuit voltage and a first impedance corresponding to a first ambient temperature in the charging mode from an impedance relation table;
calculating a charging cut-off current according to the first cut-off voltage, the first open-circuit voltage and the first impedance obtained by inquiry;
when the charging current reaches the charging cut-off current and the charging time is longer than a time threshold corresponding to the charging mode, obtaining the voltage of the stationary battery after the preset stationary time;
calculating a second impedance at a second ambient temperature according to the first cutoff voltage, the charge cutoff current and the acquired stationary battery voltage;
Updating the second impedance to data items in the impedance relationship table corresponding to both a second ambient temperature and a charging mode for charge cutoff current estimation, including determining a reference temperature segment of the second ambient temperature in the impedance relationship table, the reference temperature segment including a first reference temperature and a second reference temperature, the first reference temperature being less than the second reference temperature, the second ambient temperature being intermediate the first reference temperature and the second reference temperature; updating the second impedance to a data item of the first reference temperature, the corresponding charging mode when the second ambient temperature is less than half of the sum of the first reference temperature and the second reference temperature; and updating the second impedance to the data item of the second reference temperature and the corresponding charging mode when the second ambient temperature is greater than or equal to half of the sum of the first reference temperature and the second reference temperature.
2. The method for estimating a charge cutoff current according to claim 1, wherein the charge cutoff current is calculated from the first cutoff voltage and the first open-circuit voltage, the first impedance obtained by the query, and is calculated by the following formula:
；
Wherein,indicates the charge cut-off current corresponding to the charge mode, +.>A first cut-off voltage corresponding to the charging mode, < >>Indicating a first open-circuit voltage corresponding to the charging mode, ">The first impedance corresponding to the charging mode is represented.
3. The charge cutoff current estimation method according to claim 1 or 2, wherein the second impedance at the second ambient temperature is calculated from the first cutoff voltage, the charge cutoff current, and the obtained stationary battery voltage, by the following formula:
；
wherein,second impedance representing charging mode>A second cut-off voltage corresponding to the charging mode, < >>Indicates the charge cut-off current corresponding to the charge mode, +.>Representing a stationary battery voltage corresponding to the charging mode; wherein the first cut-off voltage and the second cut-off voltage are cut-off voltages determined according to a battery specification.
4. A charge cutoff current estimation device, characterized by comprising:
the meter building module is used for emptying the battery at the reference ambient temperature; filling according to a charging mode, wherein the charging mode comprises a fast charging mode and/or a slow charging mode; standing the battery for a period of time to obtain an open-circuit voltage of a corresponding charging mode; calculating the impedance of the corresponding charging mode according to the open circuit voltage, the cut-off voltage and the charging cut-off current of the corresponding charging mode, and establishing an impedance relation table, wherein the impedance relation table comprises the corresponding relation of the charging mode, the reference environment temperature, the open circuit voltage, the charging cut-off current and the impedance;
The judging module is used for determining a charging mode when charging starts;
the query module is used for querying a first cut-off voltage, a first open-circuit voltage and a first impedance corresponding to a first environment temperature in the charging mode from an impedance relation table;
the charging cut-off current calculation module is used for calculating the charging cut-off current according to the first cut-off voltage, the first open-circuit voltage and the first impedance obtained through inquiry;
the detection module is used for obtaining the voltage of the stationary battery after the charging current reaches the charging cut-off current and the charging time is longer than the time threshold corresponding to the charging mode and the preset stationary time is passed;
the impedance calculation module is used for calculating a second impedance at a second environment temperature according to the first cut-off voltage, the charging cut-off current and the obtained standing battery voltage;
an updating module, configured to update the second impedance to a data item in the impedance relation table corresponding to both a second ambient temperature and a charging mode for charging cutoff current estimation, including determining a reference temperature segment of the second ambient temperature in the impedance relation table, the reference temperature segment including a first reference temperature and a second reference temperature, the first reference temperature being less than the second reference temperature, the second ambient temperature being between the first reference temperature and the second reference temperature; updating the second impedance to a data item of the first reference temperature, the corresponding charging mode when the second ambient temperature is less than half of the sum of the first reference temperature and the second reference temperature; and updating the second impedance to the data item of the second reference temperature and the corresponding charging mode when the second ambient temperature is greater than or equal to half of the sum of the first reference temperature and the second reference temperature.
5. The charge cutoff current estimation device according to claim 4, wherein the charge cutoff current calculation module calculates the charge cutoff current by the following formula:
；
wherein,indicates the charge cut-off current corresponding to the charge mode, +.>A first cut-off voltage corresponding to the charging mode, < >>Indicating a first open-circuit voltage corresponding to the charging mode, ">The first impedance corresponding to the charging mode is represented.
6. The charge cutoff current estimation device according to claim 4 or 5, wherein the impedance calculation module calculates the second impedance by the following formula:
；
wherein,second impedance representing charging mode>A second cut-off voltage corresponding to the charging mode, < >>Indicates the charge cut-off current corresponding to the charge mode, +.>Representing a stationary battery voltage corresponding to the charging mode; wherein the first cut-off voltage and the second cut-off voltage are cut-off voltages determined according to a battery specification.
7. An electronic device comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the charge cut-off current estimation method according to any one of claims 1 to 3 when the computer program is executed.
8. A computer-readable storage medium, characterized in that at least one section of program is stored in the storage medium, which is loaded and executed by a processor to realize the steps of the charge cutoff current estimation method according to any one of claims 1 to 3.
CN202311606389.XA 2023-11-29 2023-11-29 Charging cut-off current estimation method, device, equipment and medium Active CN117310507B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311606389.XA CN117310507B (en) 2023-11-29 2023-11-29 Charging cut-off current estimation method, device, equipment and medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311606389.XA CN117310507B (en) 2023-11-29 2023-11-29 Charging cut-off current estimation method, device, equipment and medium

Publications (2)

Publication Number Publication Date
CN117310507A CN117310507A (en) 2023-12-29
CN117310507B true CN117310507B (en) 2024-03-29

Family

ID=89281520

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311606389.XA Active CN117310507B (en) 2023-11-29 2023-11-29 Charging cut-off current estimation method, device, equipment and medium

Country Status (1)

Country Link
CN (1) CN117310507B (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107342608A (en) * 2017-06-30 2017-11-10 宁德时代新能源科技股份有限公司 Battery charging method, device, equipment and storage medium
CN107431369A (en) * 2015-04-08 2017-12-01 英特尔公司 System, method and apparatus for adaptive battery charging
CN109642828A (en) * 2016-08-24 2019-04-16 高通股份有限公司 Technique middle-end (MOL) metal resistor temperature sensor for the local temperature sensing of active semiconductor regions in integrated circuit (IC)
CN110797601A (en) * 2019-11-26 2020-02-14 Oppo广东移动通信有限公司 Charging control method, charging control device, terminal device and storage medium
CN111183561A (en) * 2018-09-12 2020-05-19 Oppo广东移动通信有限公司 Charging control method and device, electronic equipment and computer readable storage medium
CN111406353A (en) * 2018-09-29 2020-07-10 Oppo广东移动通信有限公司 Quick charging method and device for battery, equipment to be charged and charging system
CN112769201A (en) * 2021-03-18 2021-05-07 维沃移动通信有限公司 Charging method, charging device, electronic device, and readable storage medium
CN115200191A (en) * 2022-07-20 2022-10-18 广东万颗子智控科技有限公司 Air conditioner control method and device, storage medium and electronic equipment
CN116053622A (en) * 2022-10-25 2023-05-02 欣旺达电动汽车电池有限公司 Charging remaining time calculation method, electric automobile and storage medium
CN116315294A (en) * 2022-12-20 2023-06-23 万向一二三股份公司 Self-heating method of power battery and battery management system
CN116454432A (en) * 2023-05-23 2023-07-18 国民技术股份有限公司 Charging and discharging method, device, equipment and storage medium
CN116613865A (en) * 2023-07-18 2023-08-18 广东电网有限责任公司东莞供电局 Battery quick-charging method, battery energy storage system and energy storage power station
CN116885824A (en) * 2023-08-15 2023-10-13 Oppo广东移动通信有限公司 Charging method, device, apparatus, storage medium, and program product

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023015501A1 (en) * 2021-08-11 2023-02-16 宁德时代新能源科技股份有限公司 Charging current testing method and apparatus, and charging testing system

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107431369A (en) * 2015-04-08 2017-12-01 英特尔公司 System, method and apparatus for adaptive battery charging
CN109642828A (en) * 2016-08-24 2019-04-16 高通股份有限公司 Technique middle-end (MOL) metal resistor temperature sensor for the local temperature sensing of active semiconductor regions in integrated circuit (IC)
CN107342608A (en) * 2017-06-30 2017-11-10 宁德时代新能源科技股份有限公司 Battery charging method, device, equipment and storage medium
CN111183561A (en) * 2018-09-12 2020-05-19 Oppo广东移动通信有限公司 Charging control method and device, electronic equipment and computer readable storage medium
CN111406353A (en) * 2018-09-29 2020-07-10 Oppo广东移动通信有限公司 Quick charging method and device for battery, equipment to be charged and charging system
CN110797601A (en) * 2019-11-26 2020-02-14 Oppo广东移动通信有限公司 Charging control method, charging control device, terminal device and storage medium
CN112769201A (en) * 2021-03-18 2021-05-07 维沃移动通信有限公司 Charging method, charging device, electronic device, and readable storage medium
CN115200191A (en) * 2022-07-20 2022-10-18 广东万颗子智控科技有限公司 Air conditioner control method and device, storage medium and electronic equipment
CN116053622A (en) * 2022-10-25 2023-05-02 欣旺达电动汽车电池有限公司 Charging remaining time calculation method, electric automobile and storage medium
CN116315294A (en) * 2022-12-20 2023-06-23 万向一二三股份公司 Self-heating method of power battery and battery management system
CN116454432A (en) * 2023-05-23 2023-07-18 国民技术股份有限公司 Charging and discharging method, device, equipment and storage medium
CN116613865A (en) * 2023-07-18 2023-08-18 广东电网有限责任公司东莞供电局 Battery quick-charging method, battery energy storage system and energy storage power station
CN116885824A (en) * 2023-08-15 2023-10-13 Oppo广东移动通信有限公司 Charging method, device, apparatus, storage medium, and program product

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
State of health diagnosis model for lithium ion batteries based on real-time impedance and open circuit voltage parameters identification method;Yingzhi Cui;Energy;第647-656页 *
锂离子电池脉冲充电策略研究及表征分析;陈立铎;《储能科学与技术》;第8卷(第6期);第1182-1189页 *

Also Published As

Publication number Publication date
CN117310507A (en) 2023-12-29

Similar Documents

Publication Publication Date Title
CN108646190B (en) Method, device and equipment for estimating residual charging time of battery
CN111812531B (en) Battery state detection method, device and storage medium
US11927640B2 (en) Method for acquiring information about state of battery on basis of voltage change amount of battery during charging, and electronic device for supporting same
CN117741448B (en) Rechargeable battery state of charge estimation method, device, equipment and medium
CN107611507B (en) Update method, device and the mobile terminal of battery parameter
WO2015143992A1 (en) Method and apparatus for calculating remaining charging time, and mobile device
CN113111508B (en) Evaluation method, device and server for consistency of battery cells
US20170195067A1 (en) Method and electronic device for measuring battery capacity of mobile communication terminal equipment
CN115616421A (en) Battery state of health estimation method, system, equipment and medium
CN111740464A (en) Battery power compensation method, device, equipment and readable storage medium
CN112946482A (en) Battery voltage estimation method, device, equipment and storage medium based on model
US11397213B2 (en) Method, controlling unit and electronic charging arrangement for determining state of charge of a battery during charging of the battery
CN110518666B (en) Battery charging parameter generation method, battery charging method, storage medium and electronic device
CN116840699B (en) Battery health state estimation method and device, electronic equipment and medium
CN113381479A (en) Charging method and device and electronic equipment
CN107436410A (en) A kind of electric quantity controlling method, device, equipment and storage medium
CN117310507B (en) Charging cut-off current estimation method, device, equipment and medium
CN112698229A (en) Short-circuit current detection method and device, readable storage medium and electronic equipment
CN116908701A (en) Battery capacity calibration method, device and equipment
CN111157907B (en) Detection method and device, charging method and device, electronic device and storage medium
CN115792665A (en) Method and device for determining residual capacity of battery, electronic equipment and storage medium
CN106772092A (en) Charging current based on acquisition for mobile terminal cell voltage sets system and method
CN117526529B (en) Charging control method and device, electronic equipment and medium
CN114889491B (en) Hybrid battery control method and device, storage medium and electronic device
CN114938044B (en) Method, device, equipment and medium for determining SOC (state of charge) during trickle charge of vehicle battery

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant