CN112769201A - Charging method, charging device, electronic device, and readable storage medium - Google Patents

Charging method, charging device, electronic device, and readable storage medium Download PDF

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CN112769201A
CN112769201A CN202110290868.XA CN202110290868A CN112769201A CN 112769201 A CN112769201 A CN 112769201A CN 202110290868 A CN202110290868 A CN 202110290868A CN 112769201 A CN112769201 A CN 112769201A
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charging
current
battery device
voltage
battery
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CN112769201B (en
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宋可为
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • 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
    • H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application discloses a charging method, a charging device, electronic equipment and a readable storage medium, and belongs to the technical field of charging. The charging method comprises the following steps: updating the charging cutoff current after the Nth charging of the battery device; and in the (N + i) th charging process, charging the battery device by using the updated charge cut-off current, wherein N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1. By the mode, the battery device is prevented from utilizing the M value determined in the initial factory leaving process in all charging processes, the phenomenon that the battery cell of the battery device is not fully charged is prevented by updating the M value, the charging accuracy of the FFC mode is improved, and the service life of the battery device is ensured.

Description

Charging method, charging device, electronic device, and readable storage medium
Technical Field
The application belongs to the technical field of charging, and particularly relates to a charging method, a charging device, electronic equipment and a readable storage medium.
Background
At present, manufacturers have proposed various fast charging schemes in order to increase the charging speed of electronic devices. Under the condition that the electrical property and the safety performance of the battery core are not affected, the Flash Fast Charge (FFC) scheme improves the full Charge speed by increasing the Charge cut-off voltage to compensate the polarization of the battery core, and particularly greatly shortens the constant voltage Charge time under the condition of high-rate Charge.
The principle of FFC charging technology is shown in FIG. 1, the battery capacity of the electronic device is used to be close to 0%, and the charging is carried out on the batteryThe first charging, at the time of the first charging, is carried out to the cut-off voltage U0 '(i.e., C' charging section between 0 and T1) at the constant current I1 ', is carried out to the cut-off current I11' (i.e., D 'charging section between T1 and T4) at the constant voltage U0', and the charging capacity Cap1 'of the battery is recorded by a fuel gauge attached to the electronic device, and the battery voltage curve of the first charging is shown as a curve G'. The battery charge of the electronic device is discharged to approximately 0%. The battery is charged for the second time, and in the second charging, the battery is charged to a cut-off voltage U0 '(namely, a C' charging section between 0 and T1) at a constant current I1 ', is charged to a cut-off voltage U' (namely, an E 'charging section between T1 and T2) at a constant current I2', and is charged at a constant voltage U '(namely, an F' charging section between T1 and T3), and a fuel gauge attached to the electronic device records the charging capacity Cap2 'of the battery, and a battery voltage curve of the second charging is shown as a curve H'. Capacity of battery
Figure BDA0002982589690000011
When the area of the a ' region is equal to the area of the B ' region, the current corresponding to T3 is the charging cutoff current I22 ' of FFC charging, i.e., the value of M.
Wherein U '+ Δ V of U0' + U '> U0', I2 '< I1', U0 'is a conventionally known battery charge cutoff voltage, or a supplier-specified maximum cutoff voltage for charging, U' is a maximum cutoff voltage for FFC charging, Δ V is a polarization impedance compensation voltage, I1 'is smaller than a maximum current that can be supported without lithium deposition under the U0' voltage system, I2 'is smaller than a maximum current that can be supported without lithium deposition under the U' voltage system, I22 'is a charge cutoff current for FFC charging, and I11' is a conventionally known battery charge cutoff current.
In the related art, the charge cutoff current of the battery is determined by the principle, and the charge is controlled by using the M value in each charging process of the battery. However, as the number of times of charging the battery increases, the internal resistance R of the battery cell increases, and under a certain external Voltage, the Open Circuit Voltage (OCV) of the battery cell itself decreases accordingly (the Open Circuit Voltage is a difference between the positive and negative stable potentials, and the electric quantity of the battery cell is proportional to the Open Circuit Voltage), so that the battery cell may be insufficiently charged, which affects the use duration of the user.
Disclosure of Invention
An object of the embodiments of the present application is to provide a charging method, a charging device, an electronic device, and a readable storage medium, which can solve the problem in the related art that the battery is not fully charged after long-term use due to unreasonable setting of the M value for charging the FFC of the battery.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a charging method, where the charging method includes:
updating the charging cutoff current after the Nth charging of the battery device;
in the (N + i) th charging process, charging the battery device by using the updated charging cut-off current;
wherein N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1.
In a second aspect, an embodiment of the present application provides a charging device, including:
the updating unit is used for updating the charging cut-off current after the battery device is charged for the Nth time;
a charging unit for charging the battery device with the updated charge cut-off current in the N + i-th charging process;
wherein N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, where the program or instructions, when executed by the processor, implement the charging method according to the first aspect.
In a fourth aspect, embodiments of the present application provide a readable storage medium on which a program or instructions are stored, which when executed by a processor implement the charging method according to the first aspect.
In a fifth aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a communication interface, and the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the charging method according to the first aspect.
In the embodiment of the present application, after the battery device is charged in the FFC mode for the nth time, the charging cutoff current (i.e., M value) in the FFC mode of the battery device is updated, and further, in the charging process for the N + i time, the battery device is charged in the FFC mode using the updated M value. By the mode, the battery device is prevented from utilizing the M value determined in the initial factory leaving process in all charging processes, the phenomenon that the battery cell of the battery device is not fully charged is prevented by updating the M value, the charging accuracy of the FFC mode is improved, and the service life of the battery device is ensured.
Drawings
Fig. 1 is a schematic diagram of an FFC charging technique in the related art;
fig. 2 is a schematic flow chart of a charging method according to an embodiment of the present application;
FIG. 3 is one of the charging graphs of the charging method of the embodiment of the present application;
FIG. 4 is a second charging graph of the charging method according to the embodiment of the present application;
fig. 5 is a graph of a cyclic fading of battery capacity in the related art;
fig. 6 is a schematic block diagram of a charging device of an embodiment of the present application;
fig. 7 is a block diagram schematically illustrating a structure of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The charging method, the charging device, the electronic device, and the readable storage medium provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
An embodiment of the present application provides a charging method, as shown in fig. 2, the charging method includes:
step 202, after the battery device is charged for the Nth time, updating the charging cut-off current;
and 204, in the (N + i) th charging process, charging the battery device by using the updated charging cut-off current, wherein N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1.
In this embodiment, after the battery device is charged in the FFC mode N times, the off-state charging current (i.e., the M value) in the FFC mode of the battery device is updated, and further, in the charging process N + i times, the battery device is charged in the FFC mode using the updated M value. By the mode, the battery device is prevented from utilizing the M value determined in the initial factory leaving process in all charging processes, the phenomenon that the battery cell of the battery device is not fully charged is prevented by updating the M value, the charging accuracy of the FFC mode is improved, and the service life of the battery device is ensured.
In addition, it should be noted that, in the related art, the charge cut-off current of each battery is determined by using a plurality of fresh batteries, then the arithmetic mean value of the charge cut-off current is calculated as the M value, and the M value is used in each charging process of the battery, but due to the inconsistency of the performances of the battery cells themselves, the cut-off current M value obtained by calculating the arithmetic mean value may cause the overcharge of the battery cell with a lower capacity in the charging process, and may also cause the battery cell with a higher capacity to be insufficiently charged, which wastes the design capacity. In the embodiment of the present application, since the value M can be updated, the above problem can be avoided, and the charging accuracy can be further improved.
In the related art, when charging is performed in the FFC mode, as the number of times of charging the battery increases, in order to fully charge the battery device, the cells of the battery device need to be replenished with electricity by using a method of keeping the cutoff voltage constant to the normal cutoff current. However, the method of supplementing power may significantly increase the charging time, and sometimes the battery may be continuously charged when the mobile phone displays 100% of power. In the embodiment of the application, the value M can be updated, so that the battery cell of the battery device can still be fully charged after being charged for many times, the step of supplementing the battery is not needed, and the increase of the charging time can be avoided.
In one embodiment of the present application, updating the charge cutoff current includes: sequentially carrying out charging, discharging and flash quick charging modes on the battery device in a standard charging mode to obtain a first cut-off current; the first off current is taken as the updated charge off current.
In this embodiment, a manner of updating the M value is defined, and a step of re-determining the M value is added after every N charging times of the FFC mode of the battery device. The step of re-determining the value of M is specifically to sequentially perform charging, discharging and flash fast charging in a standard charging mode on the battery device to obtain a first off-current, and then to use the first off-current as an updated charging off-current. For example, the step of re-determining the M value is added after the 100 th, 200 th and 300 th charging cycles by taking 100 times of charging as one updating cycle, and the M value is re-determined. When the M value is updated after the 100 th charge, the battery device is charged with the updated M value in the 101 th to 200 th charges.
By the mode, the M value can be determined again in a certain period, the M value can be updated, the phenomenon that the battery cell is not fully charged after the battery device is used for a long time is prevented, and the charging accuracy of the FFC mode is improved.
In one embodiment of the present application, sequentially performing a standard charge mode charge, a discharge, and a flash fast charge mode charge on a battery device to obtain a first off current, includes: charging the battery device according to a standard charging mode, and recording a first charging capacity of the battery device under the condition that the charging current is greater than or equal to a second cutoff current; discharging the cell device; the method includes charging the battery device in a flash fast charge mode, recording a charging current of the battery device in a case where a charging capacity is equal to a first charging capacity, and regarding the charging current as a first off current.
In this embodiment, the step of re-determining the value M specifically includes: firstly, charging the battery device by using a standard charging mode, and recording a first charging capacity under the condition that the charging current is greater than or equal to a second cutoff current; then, discharging the battery; and finally, charging the battery device by utilizing the FFC mode until the charging capacity is equal to the first charging capacity, recording the charging current at the moment, and taking the charging current as a first stopping current, namely obtaining a redetermined M value. Through the mode, the M value is re-determined in a certain period, so that the charging accuracy of the FFC mode is improved.
It should be noted that, when determining the first M value, the determination may also be performed by using the method for determining an M value, so as to avoid the problems that, in the related art, the cell with a lower capacity is overcharged in the charging process and the cell with a higher capacity is not fully charged due to using the arithmetic average of the charge cutoff current as the M value.
In one embodiment of the present application, charging a battery device in a standard charging mode includes: performing constant current charging on the battery device according to the first constant current until the charging voltage of the battery device is greater than or equal to a first cut-off voltage; the battery device is subjected to constant voltage charging according to the first cutoff voltage until a charging current of the battery device is greater than or equal to a second cutoff current.
In this embodiment, the charging manner of the standard charging mode is defined. Specifically, first, the battery device is subjected to constant current charging in a constant current manner at a first constant current specified by a battery supplier until a charging voltage of the battery device is greater than or equal to a first cutoff voltage; then, the battery device is subjected to constant voltage charging at the first cutoff voltage in a constant voltage manner until the charging current of the battery device is greater than or equal to the second cutoff current. Through the mode, the second cut-off current is obtained, so that basis is provided for determining the M value, the M value is updated, the phenomenon that the battery cell of the battery device is not fully charged is prevented, and the charging time is prevented from being increased.
It should be noted that the first constant current is smaller than the maximum current that can be supported without lithium deposition under a voltage system of a first cut-off voltage, which is a conventionally known battery charging cut-off voltage or a supplier-specified charging maximum cut-off voltage, and the second cut-off current is a conventionally known battery charging cut-off current.
In one embodiment of the present application, charging a battery device in a flash fast charge mode includes: performing constant current charging on the battery device according to the first constant current until the charging voltage of the battery device is greater than or equal to a first cut-off voltage; performing constant current charging on the battery device according to the second constant current until the charging voltage of the battery device is greater than or equal to a second cut-off voltage; performing constant voltage charging on the battery device according to the second cutoff voltage until the charging capacity of the battery device is equal to the first charging capacity; the first constant current is larger than the second constant current, and the first cut-off voltage is smaller than the second cut-off voltage.
In this embodiment, the charging manner of the FFC mode is defined. Specifically, first, in a constant current manner, constant current charging is performed on the battery device at a first constant current specified by a battery supplier until a charging voltage of the battery device is greater than or equal to a first cutoff voltage, and then constant current charging is performed on the battery device at a second constant current until the charging voltage of the battery device is greater than or equal to a second cutoff voltage; then, the battery device is subjected to constant voltage charging at the second cutoff voltage in a constant voltage manner until the charging capacity of the battery device is equal to the first charging capacity, whereby the first cutoff current, i.e., the newly determined value of M, can be obtained. Through the mode, the charging capacity of the battery device is equal to the first charging capacity, so that the redetermined M value is obtained, the updating of the M value is realized, the phenomenon that the battery cell of the battery device is not fully charged is prevented, and the charging time is prevented from being increased.
It should be noted that the first constant current is larger than the second constant current, the first cut-off voltage is smaller than the second cut-off voltage, the first constant current is smaller than the maximum current that can be supported without lithium deposition under the voltage system of the first cut-off voltage, the first cut-off voltage is the conventionally known battery charge cut-off voltage or the supplier-specified charge maximum cut-off voltage, the second constant current is smaller than the maximum current that can be supported without lithium deposition under the voltage system of the second cut-off voltage, and the second cut-off voltage is the maximum cut-off voltage of the FFC mode.
In a specific embodiment, a method of charging a battery device includes:
step one, when the electronic equipment is initially used, the electric quantity of the electronic equipment is used to be close to 0%.
And step two, charging a battery device of the electronic equipment in a constant-current and constant-voltage mode. Specifically, as shown in fig. 3, the battery device is charged to a first cutoff voltage U0 (i.e., a charging section between 0 and T1) with a first constant current I1 specified by the battery device supplier, and is charged to a second cutoff current I11 (i.e., a charging section between T1 and T4) at the first cutoff voltage U0 (constant voltage), and a fuel gauge attached to the electronic equipment records a first charging capacity Cap1 of the battery device. The first cutoff voltage U0 is a conventionally known battery device charge cutoff voltage, or a supplier-specified maximum cutoff voltage for charging.
Note that, as shown in fig. 3, the charging current curve in this step is a curve C, and the battery voltage curve is a curve D.
Step three, the battery device is discharged to approximately 0%.
And step four, charging the battery device, wherein during charging, the battery device is charged to a first cut-off voltage U0 (namely a charging section between 0 and T1) by using a first constant current I1, and then is charged to a second cut-off voltage U (namely a charging section between T1 and T2) by using a second constant current I2, wherein U is more than U0, further the battery device is charged at a constant voltage under the second cut-off voltage U, the current is reduced along with time, an ammeter attached to the electronic device records a second charging capacity Cap2 of the battery device, when the Cap2 is equal to Cap1, the charging is stopped (namely a charging section between T2 and T3), and the current at the moment is recorded as a first cut-off voltage I22 (namely an M value).
Note that, as shown in fig. 3, the charging current curve in this step is a curve E, and the battery voltage curve is a curve F.
And step five, after the battery device is subjected to integral multiple times of 100 th, 200 th, 300 th, 1000 th and the like, increasing the cycle of charging-discharging-charging from the step one to the step four, and re-determining the value M. For example, the first M value is determined by the curves C, D, E and F, and the first M value is used for charging from the 2 nd to the 100 th times. After the 100 th charge, the second determination of the M value is performed, specifically, (1) the first charge capacity Cap1 of the battery device is determined using the above-described method; (2) discharging the battery device; (3) the battery pack is charged to a first cut-off voltage U0 (i.e., a charging section between 0 and T1 ') using a first constant current I1, and then charged to a second cut-off voltage U (i.e., a charging section between T1 ' and T2 ') using a second constant current I2, wherein U > U0, and further charged at a constant voltage at the second cut-off voltage U, and the current decreases with time, and a fuel gauge attached to the electronic device records a second charging capacity Cap2 of the battery pack, and when Cap2 is equal to Cap1, the charging is stopped (i.e., a charging section between T2 ' and T3 '), and the current at that time is recorded as a first cut-off voltage I22, i.e., a second M value. As shown in fig. 3, the charging current curve in (3) is a curve G, and the battery voltage curve is a curve H.
Further, the charging is performed with the second M value from the 101 st to the 200 th, the charging is performed with the third M value from the 201 st to the 300 th, and so on.
It should be noted that, due to the effect of the increase of the resistance of the battery device, the charging voltage V0 of the battery device reaches the first cut-off voltage U0 earlier than the previous charge-discharge-charge cycle, the capacity is reduced during the cycle, and the charging time is slightly prolonged.
Generally, the period of the value of the M value is not necessarily 100 times, and may be any integer value which is greater than or equal to 1 time after the battery device is charged for the first time after leaving a factory, or a user may adjust the value in the intelligent management system of the battery device of the electronic device by himself, and the smaller the period of the value of the M value is, the more accurate the value of the M value is charged for the next time.
In one embodiment of the present application, updating the charge cutoff current includes: acquiring the applied voltage of the battery cell, the open-circuit voltage of the battery cell, the resistance value of the first battery cell and the first resistance correction coefficient which are charged for the Nth time; and calculating the updated charging cut-off current according to the external voltage of the battery cell, the open-circuit voltage of the battery cell, the first resistance value of the battery cell and the first resistance correction coefficient.
In this embodiment, a way of updating the value of M is defined, where the value of M is re-determined after one FFC charge of the battery device for later use in the charge. Specifically, the cell applied voltage V at the nth charge is determinedwA first cell resistance value R' and a first resistance correction coefficient k, and recording the cell open-circuit voltage V within a certain time (for example, 5min) after the Nth chargingocv. Given the following formula
Figure BDA0002982589690000091
Calculating updated charge cut-off current I according to the formulawAnd obtaining a new M value. Through the mode, the M value can be recalculated after the battery device is charged by the FFC once, the M value is updated, the phenomenon that the battery cell is not fully charged after the battery device is used for a long time is prevented, and the charging accuracy of the FFC mode is improved.
It should be noted that the first resistance correction coefficient k is a resistance correction coefficient in the nth charging, the first resistance correction coefficient k may be determined according to the value M from the nth to the jth (where j is an integer greater than or equal to 1), the first cell resistance value R 'is obtained during the nth charging, and the first cell resistance value R' is a resistance under any Charge condition Of 0% to 100% State Of Charge (SOC) during the nth charging, where the State Of Charge is a ratio Of a current capacity Of the battery device to a total capacity Of the battery device in a fully charged State.
In one embodiment of the present application, further comprising: acquiring a second cell resistance value, an N + i-th charged cell external voltage and an N + i-th charged cell open-circuit voltage of the battery device in a preset charge state in the N + i-th charging process; calculating a second resistance correction coefficient according to the updated charge cut-off current, the second cell resistance value, the (N + i) th charged cell external voltage and the (N + i) th charged cell open-circuit voltage; storing the second cell resistance value and the second resistance correction coefficient; wherein a ratio of the charge capacity in the preset state of charge to the charge capacity in the full charge state is greater than 0 and less than 1.
In this embodiment, after the N + i-th charging is performed according to the updated M value, the second cell resistance value R ″ of the battery device in the N + i-th charging process, and the cell applied voltage V of the N + i-th charging are obtainedW' and (N + i) th charged cell open-circuit voltage Vocv'. Given the following formula
Figure BDA0002982589690000092
Wherein, IMIs the updated M value.
According to the above formula, the second resistance correction coefficient k' is calculated. Further, the second cell resistance value R ″ and the second resistance correction coefficient k' are stored to provide a basis for recalculating the M value next time, so that the update of the M value is realized, the phenomenon that the cell of the battery device is not fully charged is prevented, and the increase of the charging time is avoided.
In a specific embodiment, a method of charging a battery device includes:
step one, when the electronic equipment is initially used, the electric quantity of the electronic equipment is used to be close to 0%.
And step two, charging a battery device of the electronic equipment in a constant-current and constant-voltage mode. Specifically, as shown in fig. 4, the battery device is charged to a first cutoff voltage U0 (i.e., a charging section between 0 and T1) with a first constant current I1 specified by the battery device supplier, and is charged to a second cutoff current I11 (i.e., a charging section between T1 and T4) at the first cutoff voltage U0 (constant voltage), and a fuel gauge attached to the electronic equipment records a first charging capacity Cap1 of the battery device. The first cutoff voltage U0 is a conventionally known battery device charge cutoff voltage, or a supplier-specified maximum cutoff voltage for charging.
Note that, as shown in fig. 4, the charging current curve in this step is a curve C, and the battery voltage curve is a curve D.
Step three, the battery device is discharged to approximately 0%.
And step four, charging the battery device, wherein during charging, the battery device is charged to a first cut-off voltage U0 (namely a charging section between 0 and T1) by using a first constant current I1, and then is charged to a second cut-off voltage U (namely a charging section between T1 and T2) by using a second constant current I2, wherein U is more than U0, further the battery device is charged at a constant voltage under the second cut-off voltage U, the current is reduced along with time, an ammeter attached to the electronic device records a second charging capacity Cap2 of the battery device, when the Cap2 is equal to Cap1, the charging is stopped (namely a charging section between T2 and T3), and the current at the moment is recorded as a first cut-off voltage I22 (namely an M value).
Note that, as shown in fig. 4, the charging current curve in this step is a curve E, and the battery voltage curve is a curve F.
Step five, extracting the voltage and current of the battery device at 20% SOC to calculate R20％Recording the open-circuit voltage V of the battery cell 5min after the battery device stops chargingOCVUsing the formula VW＝VOCV+k×IM×R20％Calculating a cell resistance correction coefficient k, wherein VWApplying a voltage to the cell, IMIs the value of M.
Step six, R can be extracted in each charging process of the battery device20％And the method is used for calculating the M value of the next charging process, and the M value can be recalculated in each charging process.
Step seven, the calculated M value is used for charging the battery device in the next FFC mode, and the charging curves are shown as a curve G (charging current curve) and a curve H (battery voltage curve) in FIG. 4Song) (this process is similar to the processes of (1) to (3) in fig. 3, and will not be described again here). Due to the effect of the increase in the resistance of the battery device, the charging voltage of the battery device reaches the first cut-off voltage U0 earlier than the previous charging process, the capacity decreases during the charging process, and the area of the O region + the P region in the figure is slightly larger than the area of the Q region, but the battery device can be fully charged during each charging process. In general, R20％The resistance under any charge condition from 0% to 100% SOC can be used instead, and the k value is changed accordingly.
In the related art, with a current design of 3 times of battery capacity, a 45 ℃ cyclic fading curve of a battery core with a typical capacity of 1800mAh is shown in fig. 5, and a charging scheme is as follows:
step one, pausing for 5 min.
And step two, discharging to 3V with the current of 0.5 times of the battery capacity.
And step three, pausing for 3 min.
And step four, charging to 4.2V by using a current with 3 times of battery capacity at a constant current, charging to 4.45V by using a current with 2.2 times of battery capacity at a constant current, charging to 4.48V by using a current with 1.8 times of battery capacity at a constant current, and charging to 0.783 times of battery capacity at a constant voltage.
And step five, pausing for 5 min.
Step six, charging the battery to 0.05 times of battery capacity current at a constant voltage of 4.4V.
And step seven, pausing for 3 min.
And step eight, repeating the step two to the step seven 100 times.
And step nine, discharging the current of 0.02 time of the battery capacity to 3V.
And step ten, repeating the step eight and the step nine 5 times.
As shown in fig. 5, in the parts a and B, a power supply process is added in the FFC mode charging process of the cell, and the operation is started in the 153 th cyclic power supply process (i.e., step six is executed), so that the charging time of the battery is greatly prolonged. As shown in table 1, in the embodiment of the present application, by reconfirming the M value in the charging process, compared with the current compensation process in the related art, the charging time of the battery is shortened by more than 20% in both 300 times of charging and 500 times of charging.
TABLE 1
Figure BDA0002982589690000121
It should be noted that, in the charging method provided in the embodiment of the present application, the execution main body may be a charging device, or a control module in the charging device for executing a loading charging method. In the embodiment of the present application, a charging device executing a loading charging method is taken as an example, and the charging device provided in the embodiment of the present application is described.
An embodiment of the present application further provides a charging device 600, as shown in fig. 6, where the charging device 600 includes:
an updating unit 602, configured to update the charge cut-off current after the nth charge of the battery device;
a charging unit 604 for charging the battery device with the updated charge cut-off current in the N + i-th charging process;
wherein N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1.
In this embodiment, after the battery device is charged in the FFC mode N times, the off-state charging current (i.e., the M value) in the FFC mode of the battery device is updated, and further, in the charging process N + i times, the battery device is charged in the FFC mode using the updated M value. By the mode, the battery device is prevented from utilizing the M value determined in the initial factory leaving process in all charging processes, the phenomenon that the battery cell of the battery device is not fully charged is prevented by updating the M value, the charging accuracy of the FFC mode is improved, and the service life of the battery device is ensured.
In an embodiment of the present application, the updating unit 602 is specifically configured to: sequentially carrying out charging, discharging and flash quick charging modes on the battery device in a standard charging mode to obtain a first cut-off current; the first off current is taken as the updated charge off current.
In an embodiment of the present application, the updating unit 602 is specifically configured to: charging the battery device according to a standard charging mode, and recording a first charging capacity of the battery device under the condition that the charging current is greater than or equal to a second cutoff current; discharging the cell device; the method includes charging the battery device in a flash fast charge mode, recording a charging current of the battery device in a case where a charging capacity is equal to a first charging capacity, and regarding the charging current as a first off current.
In an embodiment of the present application, the updating unit 602 is specifically configured to: performing constant current charging on the battery device according to the first constant current until the charging voltage of the battery device is greater than or equal to a first cut-off voltage; the battery device is subjected to constant voltage charging according to the first cutoff voltage until a charging current of the battery device is greater than or equal to a second cutoff current.
In one embodiment of the present application, charging a battery device in a flash fast charge mode includes: performing constant current charging on the battery device according to the first constant current until the charging voltage of the battery device is greater than or equal to a first cut-off voltage; performing constant current charging on the battery device according to the second constant current until the charging voltage of the battery device is greater than or equal to a second cut-off voltage; performing constant voltage charging on the battery device according to the second cutoff voltage until the charging capacity of the battery device is equal to the first charging capacity; the first constant current is larger than the second constant current, and the first cut-off voltage is smaller than the second cut-off voltage.
In an embodiment of the present application, the updating unit 602 is specifically configured to: acquiring the applied voltage of the battery cell, the open-circuit voltage of the battery cell, the resistance value of the first battery cell and the first resistance correction coefficient which are charged for the Nth time; and calculating the updated charging cut-off current according to the external voltage of the battery cell, the open-circuit voltage of the battery cell, the first resistance value of the battery cell and the first resistance correction coefficient.
In an embodiment of the present application, the updating unit 602 is specifically configured to: acquiring a second cell resistance value, an N + i-th charged cell external voltage and an N + i-th charged cell open-circuit voltage of the battery device in a preset charge state in the N + i-th charging process; calculating a second resistance correction coefficient according to the updated charge cut-off current, the second cell resistance value, the (N + i) th charged cell external voltage and the (N + i) th charged cell open-circuit voltage; storing the second cell resistance value and the second resistance correction coefficient; wherein a ratio of the charge capacity in the preset state of charge to the charge capacity in the full charge state is greater than 0 and less than 1.
The charging device 600 in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The charging device 600 may be a mobile electronic device or a non-mobile electronic device. By way of example, the Mobile electronic device may be a Mobile phone, a tablet Computer, a notebook Computer, a palm top Computer, an in-vehicle electronic device, a wearable device, an Ultra-Mobile Personal Computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-Mobile electronic device may be a server, a Network Attached Storage (NAS), a Personal Computer (Personal Computer, PC), a Television (TV), a teller machine, a self-service machine, and the like, and the embodiments of the present application are not limited in particular.
The charging device 600 in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
The charging device 600 provided in the embodiment of the present application can implement each process implemented in the charging method embodiments of fig. 2 to fig. 4, and is not described here again to avoid repetition.
Optionally, an electronic device is further provided in this embodiment of the present application, and includes a processor 720, a memory 718, and a program or an instruction that is stored in the memory 718 and is executable on the processor 720, and when executed by the processor 720, the program or the instruction implements each process of the above charging method embodiment, and can achieve the same technical effect, and details are not repeated here to avoid repetition.
It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and the non-mobile electronic devices described above.
Fig. 7 is a schematic diagram of a hardware structure of an electronic device implementing an embodiment of the present application.
The electronic device 700 includes, but is not limited to: radio unit 702, network module 704, audio output unit 706, input unit 708, sensor 710, display unit 712, user input unit 714, interface unit 716, memory 718, and processor 720.
Those skilled in the art will appreciate that the electronic device 700 may also include a power supply (e.g., a battery) for powering the various components, which may be logically coupled to the processor 720 via a power management system to perform functions such as managing charging, discharging, and power consumption via the power management system. The electronic device structure shown in fig. 7 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is omitted here.
The processor 720 is configured to update the charge cut-off current after the nth charge of the battery device, and charge the battery device with the updated charge cut-off current in the (N + i) th charge, where N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1.
In this embodiment, after the battery device is charged in the FFC mode N times, the off-state charging current (i.e., the M value) in the FFC mode of the battery device is updated, and further, in the charging process N + i times, the battery device is charged in the FFC mode using the updated M value. By the mode, the battery device is prevented from utilizing the M value determined in the initial factory leaving process in all charging processes, the phenomenon that the battery cell of the battery device is not fully charged is prevented by updating the M value, the charging accuracy of the FFC mode is improved, and the service life of the battery device is ensured.
In an embodiment of the present application, the processor 720 is specifically configured to: sequentially carrying out charging, discharging and flash quick charging modes on the battery device in a standard charging mode to obtain a first cut-off current; the first off current is taken as the updated charge off current.
In an embodiment of the present application, the processor 720 is specifically configured to: charging the battery device according to a standard charging mode, and recording a first charging capacity of the battery device under the condition that the charging current is greater than or equal to a second cutoff current; discharging the cell device; the method includes charging the battery device in a flash fast charge mode, recording a charging current of the battery device in a case where a charging capacity is equal to a first charging capacity, and regarding the charging current as a first off current.
In an embodiment of the present application, the processor 720 is specifically configured to: performing constant current charging on the battery device according to the first constant current until the charging voltage of the battery device is greater than or equal to a first cut-off voltage; the battery device is subjected to constant voltage charging according to the first cutoff voltage until a charging current of the battery device is greater than or equal to a second cutoff current.
In one embodiment of the present application, charging a battery device in a flash fast charge mode includes: performing constant current charging on the battery device according to the first constant current until the charging voltage of the battery device is greater than or equal to a first cut-off voltage; performing constant current charging on the battery device according to the second constant current until the charging voltage of the battery device is greater than or equal to a second cut-off voltage; performing constant voltage charging on the battery device according to the second cutoff voltage until the charging capacity of the battery device is equal to the first charging capacity; the first constant current is larger than the second constant current, and the first cut-off voltage is smaller than the second cut-off voltage.
In an embodiment of the present application, the processor 720 is specifically configured to: acquiring the applied voltage of the battery cell, the open-circuit voltage of the battery cell, the resistance value of the first battery cell and the first resistance correction coefficient which are charged for the Nth time; and calculating the updated charging cut-off current according to the external voltage of the battery cell, the open-circuit voltage of the battery cell, the first resistance value of the battery cell and the first resistance correction coefficient.
In an embodiment of the present application, the processor 720 is specifically configured to: acquiring a second cell resistance value, an N + i-th charged cell external voltage and an N + i-th charged cell open-circuit voltage of the battery device in a preset charge state in the N + i-th charging process; calculating a second resistance correction coefficient according to the updated charge cut-off current, the second cell resistance value, the (N + i) th charged cell external voltage and the (N + i) th charged cell open-circuit voltage; storing the second cell resistance value and the second resistance correction coefficient; wherein a ratio of the charge capacity in the preset state of charge to the charge capacity in the full charge state is greater than 0 and less than 1.
It should be understood that, in the embodiment of the present application, the radio frequency unit 702 may be used for transceiving information or transceiving signals during a call, and in particular, receiving downlink data of a base station or sending uplink data to the base station. Radio frequency unit 702 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
The network module 704 provides wireless broadband internet access to the user, such as helping the user send and receive e-mails, browse web pages, and access streaming media.
The audio output unit 706 may convert audio data received by the radio frequency unit 702 or the network module 704 or stored in the memory 718 into an audio signal and output as sound. Also, the audio output unit 706 may provide audio output related to a specific function performed by the electronic apparatus 700 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 706 includes a speaker, a buzzer, a receiver, and the like.
The input unit 708 is used to receive audio or video signals. The input Unit 708 may include a Graphics Processing Unit (GPU) 7082 and a microphone 7084, and the Graphics processor 7082 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 712, or stored in the memory 718 (or other storage medium), or transmitted via the radio frequency unit 702 or the network module 704. The microphone 7084 may receive sound and may be capable of processing the sound into audio data, and the processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 702 in the case of a phone call mode.
The electronic device 700 also includes at least one sensor 710, such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, a light sensor, a motion sensor, and others.
The display unit 712 is used to display information input by the user or information provided to the user. The display unit 712 may include a display panel 7122, and the display panel 7122 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
The user input unit 714 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic device. Specifically, the user input unit 714 includes a touch panel 7142 and other input devices 7144. Touch panel 7142, also referred to as a touch screen, may collect touch operations by a user on or near it. The touch panel 7142 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 720, receives a command from the processor 720, and executes the command. Other input devices 7144 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
Further, the touch panel 7142 may be overlaid on the display panel 7122, and when the touch panel 7142 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 720 to determine the type of the touch event, and then the processor 720 provides a corresponding visual output on the display panel 7122 according to the type of the touch event. The touch panel 7142 and the display panel 7122 may be provided as two separate components or may be integrated into one component.
The interface unit 716 is an interface through which an external device is connected to the electronic apparatus 700. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 716 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the electronic apparatus 700 or may be used to transmit data between the electronic apparatus 700 and the external device.
Memory 718 may be used to store software programs as well as various data. The memory 718 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, and the like), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Additionally, the memory 718 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 volatile solid-state storage device.
Processor 720 performs various functions of electronic device 700 and processes data by executing or executing software programs and/or modules stored in memory 718, as well as invoking data stored in memory 718, thereby providing an overall monitoring of electronic device 700. Processor 720 may include one or more processing units; preferably, the processor 720 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above charging method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, the processor is configured to run a program or an instruction, implement each process of the above charging method embodiment, and achieve the same technical effect, and for avoiding repetition, the details are not repeated here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A method of charging, comprising:
updating the charging cutoff current after the Nth charging of the battery device;
in the (N + i) th charging process, charging the battery device by using the updated charging cut-off current;
wherein N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1.
2. The charging method according to claim 1, wherein the updating the charge cutoff current includes:
sequentially carrying out charging, discharging and flash rapid charging in a standard charging mode on the battery device to obtain a first cut-off current;
the first off current is taken as the updated charge off current.
3. The charging method according to claim 2, wherein said sequentially performing a standard charge mode charge, a discharge and a flash fast charge mode charge on the battery device to obtain a first off current comprises:
charging the battery device according to the standard charging mode, and recording a first charging capacity of the battery device under the condition that the charging current is greater than or equal to a second cutoff current;
discharging the cell arrangement;
charging the battery device in the flash fast charge mode, recording a charging current of the battery device in a case where a charging capacity is equal to the first charging capacity, and regarding the charging current as the first off current.
4. The charging method of claim 3, wherein said charging said battery device in said standard charging mode comprises:
carrying out constant current charging on the battery device according to a first constant current until the charging voltage of the battery device is greater than or equal to a first cut-off voltage;
and carrying out constant voltage charging on the battery device according to the first cut-off voltage until the charging current of the battery device is greater than or equal to the second cut-off current.
5. The charging method according to claim 3, wherein said charging the battery device in the flash fast charge mode comprises:
carrying out constant current charging on the battery device according to a first constant current until the charging voltage of the battery device is greater than or equal to a first cut-off voltage;
performing constant current charging on the battery device according to a second constant current until the charging voltage of the battery device is greater than or equal to a second cut-off voltage;
performing constant voltage charging on the battery device according to a second cutoff voltage until the charging capacity of the battery device is equal to the first charging capacity;
wherein the first constant current is greater than the second constant current, and the first off-voltage is less than the second off-voltage.
6. The charging method according to claim 1, wherein the updating the charge cutoff current includes:
acquiring the applied voltage of the battery cell, the open-circuit voltage of the battery cell, the resistance value of the first battery cell and the first resistance correction coefficient which are charged for the Nth time;
and calculating the updated charging cut-off current according to the battery cell external voltage, the battery cell open-circuit voltage, the first battery cell resistance value and the first resistance correction coefficient.
7. The charging method according to claim 6, further comprising:
acquiring a second cell resistance value, an N + i-th charged cell external voltage and an N + i-th charged cell open-circuit voltage of the battery device in a preset charge state in the N + i-th charging process;
calculating a second resistance correction coefficient according to the updated charge cut-off current, the second cell resistance value, the (N + i) th charged cell external voltage and the (N + i) th charged cell open-circuit voltage;
storing the second cell resistance value and the second resistance correction coefficient;
wherein a ratio of the charge capacity in the preset state of charge to the charge capacity in the fully charged state is greater than 0 and less than 1.
8. A charging device, comprising:
the updating unit is used for updating the charging cut-off current after the battery device is charged for the Nth time;
a charging unit for charging the battery device with the updated charge cut-off current in an N + i-th charging process;
wherein N is an integer greater than or equal to 1, and i is an integer greater than or equal to 1.
9. An electronic device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the charging method of any one of claims 1 to 7.
10. A readable storage medium on which a program or instructions are stored, the program or instructions, when executed by a processor, implementing the charging method according to any one of claims 1 to 7.
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